Concrete conveying pump hydraulic system maintenance

April 17th, 2012 by admin | Permalink

Concrete  pump hydraulic system maintenance

Concrete pumping is the use of pipeline transportation of concrete equipment, used for transporting concrete and reinforced concrete building structure offers widely applied in the construction of tall buildings or high rise, the Bridge and tunnel construction. Methods of delivery of concrete, can reduce costs and save time building, regulate the construction site.
Machine wings through the study of the concrete pump in the use of technology in the process of change, in the limit has not been reached before wear or breakage of mechanical parts and perform the jobs necessary maintenance and repair, you can extend the life of concrete pumps and eliminate hazards, accident prevention, ensuring the smooth progress of pumping operations.
Below, in the framework of Yongda technician experience must focus in the use of concrete delivery pump maintenance and overhaul of parts and content summary, for the wing to guide operations and customer use.
The company’s wing production of concrete pumps, for example, the hydraulic system of the valve consists of the main hydraulic system pump, distribution system, mixing oil and lubrication systems, oil systems into four parts . On maintenance and repair of hydraulic systems is the goal of maintaining the concrete pump, includes the following several points:

1. Hydraulic oil is the means of power transfer, softeners and coolant, when selected, taking into account the working conditions on the perimeter of the hydraulic system and the role of hydraulic oil, should have a viscosity adequate, good lubricity and good oxidation resistance and good clean sex.
Normal temperature of hydraulic oil to 20 ¡æ ~ 60 ¡æ, high limit temperature of 70 ℃.
Hydraulic oil, best when coupled with hydraulic oil so that the land in the hydraulic oil with engine oil: oil line as much as possible, to avoid new and old oil. After oil, first rinse with an accumulation of low viscosity hydraulic oil in the system and the hydraulic oil must contain preservatives to prevent rust from metal surfaces after heat oil.
Oil pump, oil engine fails after removing hydraulic oil maintenance must be replaced.
All aspects of the management and use of hydraulic oil to prevent oil pollution. Battery hydraulic oil should be placed individually, with tarpaulin covers to prevent dust and waterproof, and the gun must be loaded to prevent formation of condensation.
Oil filter main hydraulic system, oil filter must frequently check for blockage, found nearly all the oil filters to clean or replace the filter element.

2. hydraulic oil tank
The main cause of pollution of the hydraulic oil tank:
A. dust from construction site.
B fuel tank. small hydraulic oil before entering the pump once again did not receive sufficient rainfall.
C. least amount of hydraulic oil and the corresponding increase of the rotational frequency, pollutants increase in the hydraulic system of the grinding.
Hydraulic oil tank in the oil mesh filter tubes to be cleaned on a regular basis on the head to ensure that the oil pump can inhale enough hydraulic oil.

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Concrete pump gate valve problems that need attention in the course of

April 17th, 2012 by admin | Permalink

Concrete pump gate valve problems that need attention in the course of
Concrete-type distribution valve gate valve concrete pump, absorption of coarse material is strong, so a wider application. But due to the use and maintenance of life different service gate valve have many differences, even if the pump was pumping concrete 20000m3, but also are working and concrete pump, pumping 10,003 and then replace the door or even replacing the valve door while. In our experience, to extend the life of the gate valve, should be concerned with the following several points.

(1) master gate valve concrete pump type by using conditions and according to strictly apply the rules of
Gate valve door when working directly on the pipeline in the shearing of the concrete, although the door is made of high wear resistance, high strength parts, but can not afford the enormous impact, So do not let the iron bars, super hard stones and other debris fell into the hopper to prevent the broken door. In addition, door gate valve when pumping concrete for high rise buildings suffer from any back pressure inside the concrete pipe, allowing door to increased wear, difficult directional control valve gate. So try not to use the transmission gate valve over 60 million concrete buildings, extend the life of gate valve.

(2) the timely maintenance of gate valve concrete pump, maintaining the smooth flow of road lube oil
Because the door seal material of Taoist valve and consumes relatively more fat, if the road should always check the lubricating oil free, such as blocking, time must be after pumping concrete to avoid injury to the guide bar. Finished concrete pump must be discharged after completion for a while at a time, until the maximum points of lubrication grease and residual approach until the mortar compresses.

(3) adjusting the clearance
Gate valve on the cylinder, temporary accommodation while traveling, the two set screws, can be used to position the door to prevent the impact of the tower upper and lower seats, delaying its wear. Door after wear, the gaps between the door and seat, you can adjust the door cylinder piston valve to adjust the distance between the beam and the piston stroke to eliminate the gap, the normal object usage the screw.

(4) the timely repair
After a period of time after the use of gate valves, appear on the upper and lower seats deep dents, electrode patches available at that time, the grinding and grinding until you can continue using it. After prolonged use, the door will taper off, thin, if you wish to continue using the hand wheel door fixed so that its line with the valve seat and the divisions and adjust the clearance between shell and copper on shelves, long periods. Because of hydraulic cylinders piston-cylinder-gate valve, prolonged use may cause oil temperature is too high, causing damage to the seals on the piston, resulting in the inability of the valve seat. At the moment, please replace the seals on the piston.

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How to choose the right mortar pump

April 17th, 2012 by admin | Permalink

How to choose the right mortar pump

Petroleum, chemical industry play a very important position in the national economy as a key for the mortar pump devices have been increasingly of concern. Due to chemical characteristics of the media and confused, coupled with maintenance and equipment energy consumption on the demand growth environment from time to time, as a manufacturer of consumer chemical products, how to stop pump selection Chemical? Focused attention to what? And … is very important. Separation and characteristics of products related to chemical companies over the choice of standard chemical pump is a brief review, hoping to benefit customers in the broad categories of work better.
A selection of reference in accordance with the mortar pump:
(A), the pump is based on the following selection methods:
pumps 1, entry to the application for admission means (such as “acid concentrated sulfuric acid, concentrated nitric acid”), highly corrosive, flammable media, pollution-free environment – the choice of any magnetic drive, such that the “series CQB magnetic force pump, pump series IMD magnetic force, need to suck – the choice of magnetic force pump ZMD series;
2, IHF centrifugal pump and centrifugal pump high FSB speed, small size, light weight, high efficiency, pulse-free flow is structurally simple, large, perfusion, stable performance, easy operation and maintenance and other characteristics, as work without a special request, the better – selection of centrifugal pumps;
Chemical pumps of medium 3, containing solids inlet, parts of convection – mortar pump during use of wear resistant materials for the best selection of objects, UHB-ZK resistant to rot resistant geniuses UHBWPE wear plastic high strength mortar pump again, this is a modification of polyethylene ultra high molecular weight (more than $ 5 million). Plastic, it has excellent wear resistance, experimental, its abrasion resistance is much higher than stainless steel and impact resistance and creep resistance and excellent corrosion resistance (F4), there is no common properties such as adhesion;
4, when the average level below the pump when the pump sucks-FZB for shouldelect, as necessary to satisfy the tight-optional magnetic characteristics ZMD self-priming pump.
Selection of plastic pumps of fluoride should consider the following questions:
1, corrosion problems: a long time, corrosion is a chemical equipment against one of the most headaches, slightly rough and slight damage to your equipment, is formed and raised serious accidents. According to statistics, about 60% is due to corrosion damage of chemical equipment and chemical pump selection must first of all pay attention to the selection of scientists. Generally, there is a misunderstanding, that stainless steel is “universal intelligence” regardless of what the media and environmental conditions are required to stainless steel, it is a risk. Some common chemical media following about the selection of points:
1) sulfate: media as a highly corrosive sulfuric acid is the widespread use of important industrial raw materials. The sulfuric acid corrosion of materials of the difference of different concentration and temperature is large, concentrations above 80%, the temperature is less than 80 degrees centigrade of concentrated sulfuric acid and has the best corrosion resistance of the carbon steel and cast iron, but it is not the right high speed activity of sulfuric acid, does not apply as the valve on the pump information; ordinary stainless steel 304 ( 0Cr18Ni9), 316 (0Cr18Ni12Mo2Ti) for sulfuric acid is also useful is limited. Inlet valves to pump sulfuric acid are usually high-silicon iron (molding and processing problems), high alloyed stainless steel (alloy, 20th), manufacture, but the process is difficult and expensive, so as not to be optimistic. Plastic alloy fluoride is good performance of resistance to sulfuric acid, is the discussion of Organic Chemistry Chinese Academy of Sciences in Shanghai by the patent information, I Yu 1985 introduced technology patents, all of first with its development of society and consumer resistance to chemical corrosion pump, by actual examination of CAS proved, has not currently apply now the temperature range within a species can the media with chemical product response and pump used fluoride doubled (F46) is a more economical choice.
2) hydrochloric acid: corrosion resistance, hydrochloric acid and metallic materials are not more (including all kinds of stainless steel materials), high-silicon iron containing molybdenum is only available for 50 ° C, the hydrochloride 30%. Information metals and instead, the vast majority of non-metallic materials have good corrosion resistance to hydrochloric acid, is packed with a rubber pump and pump (such as engineering plastics, fluoride, etc..) Is the best choice for admission to hydrochloric acid.
3) nitric acid: General more metal in nitric acid in the corrosion is destroyed Blaster, stainless steel is wider application information of resistance to nitric acid, at room temperature Xia any concentration of Nitric acid is a good corrosion resistance of sexual value to one’s with MO (like 316 and 316 L) stainless steel in nitric acid corrosion resistance is sex not only no better than the general stainless steel ( as 304 and 321), and that sometimes. The nitric acid at high temperature, generally with fluorine plastic alloys.
4) acetic acid: this is one of the most corrosive substances, organic acids and general steel corrosion in serious concentration and temperature of acetic acid, acetic acid resistance of stainless steel is excellent information , 316 stainless steel with molybdenum can also be applied to steam at high temperature and dilute acetic acid. The high temperature corrosion of a high concentration of acetic acid or other media demanding request, the choice of the pump alloy or stainless steel high fluorine plastic. CQB fluorinated magnetic force pump, IMD, IHF fluorine lining magnetic lined pumps, centrifugal pumps FSB fluorine alloy centrifugal pumps and so on.
5), caustic soda (sodium hydroxide): general corrosion is not very strong, but alkaline solutions have a regular crystal, hence the choice of hardware configuration silicone seal mechanical pump graphite lined 169 IHF centrifugal and FSB fluorine alloy centrifugal pump.
6), ammonia (ammonium hydroxide): most metallic and nonmetallic in liquid ammonia and corrosion aqueous ammonia (ammonium hydroxide) is very low, as the application of alloy Copper and copper should not be. Admission of products most suitable for ammonia and ammonia. Fluorinated magnetic force pump, centrifugal pumps of fluorine plastics can be used to ensure long term stability.
7) salt water (sea water): carbon steel in the solution and the corrosion rate of sodium chloride is not too high in water, salt water, maintenance of regular paint, all kinds Stainless steel also has a corrosion rate of very low average, but it can cause due to the chlorine ion from corrosion, usually made of 316 stainless steel is a good thing.
8) Class and Class alcohol ketone, ester class and class of ether: common media class of alcohol is methanol and ethanol and ketone media class c glycol and alcohol, have the acetone and ketone d, Ester-class media various esters, methyl ester and b,, medium-class ether and ether, ether and ether, they Sexual fundamental corrosion is not solid and can select general selection stainless steel, Shi also has more selection according to media ownership and related actions reasonable. Also of note is a ketone, ester, ether on a variety of rubber is dissolved in choosing a sealant prevents errors.
There are many other media can not be introduced one by one here, in short, when the material is not freely and knowingly, should check the materials or create a more mature experience.
2, seal the problem is no escape from the pursuit of chemical material, it is this demand that contributed to the application of magnetic force pump expansion. Really no escape from but still have a long way to go, for example insulating magnetic pump bites of life issues, problems of information, problem static sealing of ideas and so on. Now introduce some simple sealing are as follows:
1) how seal: seal static, usually as a stamp seal with two kinds of ring and ring SEAL SEAL and type application o ring wider and the seal dynamic, rarely used chemical pump packing seal, seal machines mainly, seal machines and end surface of single and double surface type and end balanced and unbalanced type min, balanced type of media applies high pressure seal Yu (usually means the pressure is higher at 1.0MPa), double end machines surface main seal for high temperature and crystal and easy to stick with particles and toxic volatile media, double-mechanical seal end should be injected in liquid waterproofing isolated, its normal that the average pressure 0.07 ~ 0.1MPa, maintenance of a mechanical seal device of the single-end complex face, do not need to participate in the coolant isolation, moderate price and other benefits, c is the chemical used is generally a dynamic seal in the pump.
2) seal information: chemical pump seal static magnetic background information used fluoro rubber, special status information used only four poly fluoride; machinery seal ring hybrid configuration over Key information is not carbide and carbide mill on best, price is high when both no difference in hardness does not make sense, so much better accordance with characteristics different media perspective, I seal machinery company to provide CTI has four fluoride (basic configuration) and CIS CIS and alumina ceramic four fluoride and CIS on the alumina ceramic, cemented carbide and asks users to choose configurations carbide.
Problem 3, viscosity: medium viscosity effect on pump performance is great, when the viscosity increases, lifting the pump curve landed, head and flow with the optimal condition of land, with increased power and therefore ineffective. General admission to sample the water when the performance parameters, must stop when admission to the viscous media conversion (conversion of the correction factor of different viscosity are in the accompanying table). Pump high viscosity mud mortar, paste and classes thin fluid intake, selection initiative, UHB-ZK decay of mortar pump resistant to wear I can be applied to an environment with sticky or corrosive particles.
Second selection criterion pump: Institute of Design in the design, when the equipment is installed, make sure that the performance parameters and the utility and select the type of pump to pump.
This option must first pump the selection of varieties and start to what criteria to choose the pump? According to what?
1, the type of selected pump-specific performance and installation, pressure, temperature, flow, lift NPSH, suction process parameters as requested;
required and 2 correspond to the characteristics of media requests, the admission of flammable and toxic media or precious easy explosion of the pump shaft seal applications or solid no leaks on the pump as a pump magnetic drive (no axis sealing, insulation type used indirect magnetic drive), on admission of sexual media corrosion of the pump parts inquiries convection sexual information used to resist corrosion, such as pump corrosion resistance of plastic fluoride at admission with the media of solid particles of the pump parts request convection used wear information necessary shaft seal used with Shi own washing liquid;
3, the machine asks the ideas of high noise, low vibration small;
4, exact calculation of the supply pump in the capital.

 

Henan Oriental Construction Machinery Co., Ltd. is a state-designated manufacturer and exporter of Road and Building construction machineries since 1989, We are the manufacturer ,supplier&exporter of semi-automatic and full-automatic dry mortar mixing plants,large and medium size of concrete mixing plants,all kinds of concrete mixers and cement silos,Rotary dryer Series,Mortar Spraying and Pump.

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Mud pump failure causes and solutions

April 17th, 2012 by admin | Permalink

Mud pump failure causes and solutions

Mud pump failure causes and solutions
Mud pump failure: pump non-absorbent
Reason: insufficient perfusion diversion can not be discharged air pump, the suction pipe leak liner and impeller clearance
Approach: continuous perfusion diversion, reflect on the pipeline whether leak, conditioning impeller and front liner clearance
Mud pump failure: pump Sheung Shui slow
Reason: the former liner and impeller clearance, water pipes can not be sealed air, emptying full
Approach: the gap conditioning, conditioning water pipe, the device vacuum installation
Mud pump failure: water pressure, flow
Reason: pump air impeller and front liner gap separation of the party is not closed tight, the impeller or liner wear
Approach: emptying the gas pump, the conditioning gap, conditioning the separation of party control friction plate gap, the change in the impeller or lining
Mud pump failure: pump vibration
Reason: the pump shaft and the diesel engine (or motor) differences between the heart, refuses to accept the balance impeller, bearing damage
Approach: conditioning concerted degree impeller for balancing test, the change in bearing
Mud pump failure: impeller journal wear
Reason: high-pressure pump head, packing dislocation, the heart of the shaft and the rear cover differences
Approach: change than mud pumps lift the high-pressure pump, change the packing, conditioning concerted
Mud pump failure: pump wear
Reason: the construction of the (larger) far walks interval, long water pipeline
Approach: to change the battlefield and add the afterburner unit, to shorten the length of the inlet pipe to reduce the cavitation

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The effect of fly ash in cement concrete pump

April 17th, 2012 by admin | Permalink

The effect of fly ash in cement concrete pump

Fly ash cement concrete pump hand has three basic effects, morphological effects, effects of volcanic ash and little overall effect. Control of these three effects to the favorable direction, Treasury waste, improving the performance of concrete.
(1) the effect of the form
Morphological effect of fly ash, mainly refers to the shape of fly ash particles, weights, surface characteristics such as the effects of roughness in concrete. Effect of microsphere particles of fly ash may play the ball, reduce friction and increase liquidity in the concrete mixing plants. Less density of fly ash cement, equivalent alternative can increase the volume of sludge to improve the degree of lubrication for coarse and fine aggregates, is conducive to improving the fluidity of the concrete mixture. In addition, can also increase the homogeneity of the concrete, coherent and water retention.
Lower fly ash containing granules of irregular and more porous carbon is not burned and lead to increased demand for water and water retention worse, have a negative effect on the concrete.
(2) the effects of volcanic ash (activity effect)
Fly ash is mixed mineral assets. Fly ash containing alumina and amorphous silica are the activity of silica and alumina, which can be produced by the hydration reaction of cement hydration of calcium hydroxide and water (hydration reaction, also known under the name of the secondary reaction), generated by the hydraulic characteristics, such as hydrates of calcium silicate hydrates and calcium aluminate fill the capillary pores. These hydration products, the same force, the calcium silicate hydrates in particular, the hydration reaction low 28 D, especially in 7 days, the D 28 clear step by step at a later time. The finer the fly ash, the smaller particles, higher activity, the higher the hydration reaction, the higher the temperature of the hydration reaction with a faster growing stronger. When the temperature is below 05 stops the hydration reaction, slow development of force.
After the effects of volcanic ash improves concrete strength, resistance to a time not later than the concrete mixed with fly ash and more over the age difference. The earlier less load capacity requirements engineering can use his strength when he 60 d, 90 d, 180 d.
(3) the effect of microaggregates
Pearl ash high intensity, it fills the spaces between the cement particles, reduces the capillary pores and plays a role in micro-framework. Continuous hydration, not the products of hydration hydration of fly ash and fly ash increasing bond strength of the core, which is conducive to improving the effects of micro-aggregates of fly ash.
In addition to these three fundamental effects, a fly ash also has many other effects, such as the immune response (inhibiting the effect of alkali aggregate reaction, the effect of improving the corrosion resistance), reduced the thermal effect (cooling effect), pumping effect, but these effects can not be separated by three effects above base.

Henan Oriental Construction Machinery Co., Ltd. is a state-designated manufacturer and exporter of Road and Building construction machineries since 1989, We are the manufacturer ,supplier&exporter of semi-automatic and full-automatic dry mortar mixing plants,large and medium size of concrete mixing plants,all kinds of concrete mixers and cement silos,Rotary dryer Series,Mortar Spraying and Pump.

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Concrete pumps, mortar pumps, Cox troubleshooting

April 17th, 2012 by admin | Permalink

Concrete pumps, mortar pumps, Cox troubleshooting

What will become of the concrete pump sucks in air
Concrete pumping is strictly prohibited in the process of pumping air required a good seal.Therefore, the construction units in the building should pay attention to when checking the tightness of the linked site.
Because in the process of pumping concrete into the air in the tube is not good and concrete mix, is not uniformly distributed, or how many others, can easily cause vapor lock. And boarding agent in air is a tiny air bubbles in the concrete mix evenly in the material, plays a lubricating effect, may decrease the strength of concrete, concrete delivery. Inhalation of the amount of air a hopper is out of control and comparison of air is compressed material that could collapse the piston at work, but feeding tubes in the concrete flow is slow and even to stop, long prone to clogging, air-boarding is interested in joining agents to join the air is small uniform distribution, for the transportation of concrete.
After the flight of the concrete pump causes the pump pressure has not been improved so that the concrete is difficult to be delivered to the specified height.

Pumps, hydraulic pumps grout mortar grouting pump causes noise solutions
1) be dirt blocking the filter of the pump does not the oil filter: clean clean the oil filter to remove dirt.
2) petroleum, oil-absorbing position is too high, oil suction tubes exposed surface area: oil, reducing oil absorption.
3) not on either side of the pump and pump and covered with mats of paper; perpendicular to the pump and pump cover seal, when the rotating air: pumps and pump cover joins the pad paper; Emery on flat pump, pump and pump cover for vertical error is 0.005 mm, fixing pump and pump cover, there is no leakage.
4) motor and pump shaft coupling different hearts, twisted friction: adjustment of the concentricity of the pump and motor coupling so that the error does not exceed 0.2 mm.
5) precision gear pump commitment is not enough research on gear accuracy of the machine.
6) skeleton oil seal off the shaft of the pump, the pump does not seal, replace the oil pump shaft seal qualified.

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How to extend the concrete pump life slide valve

April 17th, 2012 by admin | Permalink

How to extend the concrete pump life slide valve

Concrete pump mounted slant 7, use of slide valve damage premature problems frequently encountered in the process, mainly for: damaged parts of the valve stems slide, stem is irregular and variable depth of the axial grooved rod motion, upper and lower do not reach the required location, can not carry the rod while serious map. Revision must stop at that time, or even replace the valve stem or valve assembly, being not only directly affects the concrete pumping work. After the disintegration of the overall performance of slide valve: nylon seal seriously damaged, damaged stuffed with concrete blocks of sand, small, or even a small Peter fat supply pipes taken at the top.
The analysis, there may be a slide valve damage are factors:
① irregular lubrication system operation
② (start of the race before or after the workload is not enough),
③ the poor quality of the lubricating grease;
④poor quality concrete slide valve
⑤ himself poor; injuries slide valve
⑥ More easily slide valve damage caused by factors that mainly lubrication system failure and malfunction.

Main slide valve box grease lubrication system, filters, grease, grease pump, valve and damper tubes of lubricating greases and other components. The key elements are the grease dispensing valve.
Lack of lubrication system Slide valve is lubrication points can not be requested or poor lubrication lubrication, but poor specific lubrication point, the valve must also be observed distribution of fat on the valve and the display indicating the valve Security, if necessary, to release all observation lubrication points of interface you want. A dispensing valve is composed of lubricant dispensing valve and safety valve, as shown in Figure 2. Its role is to assign the lease of grease grease gun supplied. When a tube of grease cap is at the top of mortars, display bar will extend from the valve, the abnormal fat. Also fitted with a tap in the spectacle of the valve, lipid peroxidation in the normal case for cycles 1, show an action, if the display is not a movement of said valve dysfunction. Lubrication pipes and lubrication characteristics points are not reversed.

Henan Oriental Construction Machinery Co., Ltd. is a state-designated manufacturer and exporter of Road and Building construction machineries since 1989, We are the manufacturer ,supplier&exporter of semi-automatic and full-automatic dry mortar mixing plants,large and medium size of concrete mixing plants,all kinds of concrete mixers and cement silos,Rotary dryer Series,Mortar Spraying and Pump.

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High pressure grouting machine machine parts, accessories Note

April 17th, 2012 by admin | Permalink

High pressure grouting machine machine parts, accessories Note

Accessories of machine grout
Grout guns, high pressure hoses (7.5 m/15 m), butter, repair kits, filling nozzle.

Mechanical parts, high pressure grouting machine
pipe pressure of 5 m high, group, switch t-handle valve wrench, head of butter, seal, vacuum pump, pressure gauge, repair kit, drilling, etc..
Special Notice
1, when starting the machine, you must first open the tap, beginning after the engine when machine is on, you must first open the engine, turn off the valve after, otherwise easily lead to the explosion and damage to the machine and so on.

2, when the molding machine high pressure when working pressures up to 200 kg, must be stopped, otherwise easily lead to construction of concrete split and jeopardize safety.

3, the molding machine at high pressure against the pressure test of water (available, such as oil, pressure test cooking oil), to verify if the machine before using the normal relaxation, jointsare tight, there is no screw no leaks. Check after construction.

4, construction personnel must wear eye protection, protective equipment like rubber gloves, if there is more than one hour and the time does not use the machine, must be clean.

Cracks in the construction of materials, beams, columns, reinforcing plates.
Attention
A) rating to ensure the accuracy of pipeline to connect before you press the power connections are secure.
B) test the machine cycle, after you confirm that everything works, then the suction tube into the grout paste bin (Note barrels of size should be based).
C) emptying the machine, until it all started when the size, then start grouting.
D) a complete grout grouting machine must be cleaned to avoid grout curing grout.
E) outer molding machine WIPE clean grout take part head to clean.
F) injections when it is flammable, explosive liquid, notes used in well ventilated areas and eliminate all ignition sources.
G) high voltage spray can cause the mud in the human body, when the grout, staff must wear protective goggles, coveralls and wearing rubber gloves. When not at work, to disable the trigger insurance sales; keep the hole from the gun nozzle clean grout to stop or start when the interview should be the relief of pressure, do not use less than machine parts maximum working pressure grouting; Child prohibits the use of the machine.

Henan Oriental Construction Machinery Co., Ltd. is a state-designated manufacturer and exporter of Road and Building construction machineries since 1989, We are the manufacturer ,supplier&exporter of semi-automatic and full-automatic dry mortar mixing plants,large and medium size of concrete mixing plants,all kinds of concrete mixers and cement silos,Rotary dryer Series,Mortar Spraying and Pump.

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How to avoid improper use of concrete pumps wearing parts damage

April 17th, 2012 by admin | Permalink

How to avoid improper use of concrete pumps wearing parts damageConcrete pumping at work, if used correctly, could easily lead to premature damage of parts of the pump, which not only increases the cost of maintenance, severely affected production. How to improve the life of the concrete pump bearing parts, combined Explorer.1. cut the ring and glasses
Cutting ring and the glasses are a pair of closely with the relative movement of the part, both contacts are welded with a layer of wear-resistant materials, the shaft ends of the spline s-shaped nut tube, adjust the gap between the two (0.1 ~ 0.2) mm. Assembly between the s-tube and spring cutting rubber ring, cutting rings and glasses may be flexible relative motion at ease.
With prolonged use of springs lost elasticity, cutting the rings of land will glasses and rubber plates, resulting in a gap between the two increases. When the gap when> 0.7 mm, for immediate adaptation, or mortar pump will have the “gap” in. Once the mortar into the surface friction, and wear ring optical plate cut will greatly accelerate the speed.
When pumping concrete, pipe cutter ring with S-shaped swinging, swinging piece cut concrete effect, thus cutting ring wear more quickly, the output pressure of the concrete, the more severe the degree of wear of the ring of the cut. In general, cutting wear occurs primarily at the edge of the ring and the top two symmetrical parts of a 90 ° angle. Therefore, when you wear these parts of the ring cutting, will continue to be used after the rotation angle cut ring in a timely manner, this is equivalent to extend the life of the cutting ring 1 times.
Wearing glasses first occurs in the nose of the Commission, several disparities between the glasses and the ring up, wear faster. If you need to keep an eye glasses and cutting gaps between the rings, once clearance increases must tighten immediately in the form of nuts or replacement of worn parts, preventing the mortar on the friction surface. When the loss of elasticity rubber springs and need to replace quickly. Cutter ring and glasses can repair and welding electrode D507 available continue to be used later.

2. piston and the cylinder conveyor
Piston is made of polyurethane material, abrasion resistance flexible conveyor in a cylindrical cladding material. Piston cylinder lubrication between the general and transportation there are two: one self lube, pump, automatic lubrication system ADD fueling the other is a manual artificial periodic refueling requirements, lubrication system. For the automatic refueling, periodically check the oil for free, once the circuit is blocked, transport and piston cylinder will rapidly filling system manual, the operator must comply with the different working environment and regularly add lubricating oil, normally 1 / h. Remember when you come, be sure to move the piston to move toward the bottom of the vertical padding, just in the center of the piston to the reservoir for lubricating oil.
Sent process pump, operating staff also often for Operation “stifles the cylinder” piston cylinder is main oil at the end of Shi button dynamic operating points, keep 5 ~ 8 s, cavity oil added closed main oil hydraulic oil cylinder (based on to close switch machine reversing pump, also near switch near side main oil cylinder), complete with cylinders transportation of the tower, avoid the local wear of transport cylinder.
Operators must also pay special attention to water tanks, once the water is muddy or sandy water, the piston can be worn, need to change piston or increased wear of the cylinder piston and transport . If after replacing a new piston, variable turbidity of water quickly, then the transport roller is worn out and need to replace the transmission reservoir. Conditions, by measuring the diameter of the method for determining whether the transfer roller are, in general, cylinder wall thickness chrome plating only (0.2 ~ 0.25) mm, when the cylinder increases (0.45 ~ 0.55 ) when mm, need to replace the transmission reservoir.
In addition, the water temperature of the cooling water in the water tank is also very important, the water temperature is too high, will also increase the wear of the piston, the need to replaceconstant of the water in the tank of cooling water.

3. pipeline
When you take, remember to look at the pump outlet, that is to say, from front to rear, not two, in the middle.
Improper connection between the “internal forces” could easily pipe for exhausting a mixed fracture. Pipeline is completed, from machines to pump, hose, suspended, are set to prevent pipe flushing pipes and damage.
Due to the pump, closer, concrete pressure in the pipeline, plus the thickness you want to use the new outlet pipe of pump, the thin wall of the old pipes in the remote machine without pump, to improve the life of the pipe, at the same time reduce the possibility of an explosion.
For tube bending, wear away the side of the pump is the most serious, should be often used in turn to bend, extend its life.

4. discharge hole, conical tubes, valve
For hose tap, conical tubes, distribution and other related parts, once you wear layers are ground off, D507 electrode surfacing timely, can still be used for a period of time.
Due to different site conditions, such as distance, the height of the concrete level, pumping, made in different sites, cutting rings and glasses wearing parts of life vary greatly, but as the proper use and treatment, pump bearing parts of life can be significantly longer.

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Mortar pumps, mortar pumps in construction works

April 17th, 2012 by admin | Permalink

Mortar pumps, mortar pumps in construction works

Waterproof layer of cement mortar, hydrophobicity is the main use of the mortar itself to achieve impermeability waterproofing effect and density, suitable for shallow, reinforced the degree of drying overall level of requirements are not high building.
First, preparation of construction

1, Material
Cement
⑴: not below grade No. 425, Portland slag cement or Portland.
⑵ sand: cement mortar thickness and size should not exceed 3 mm related, should be treated with sand content of mud-not more than 3%.
⑶ adjuvants: oil impermeable seal, powder metals, chloride salts can also be used for sealant, or use the expansion agent and reducing agent.

Two working conditions
⑴ the basic level should be dense, rough, smooth, clean surface.
⑵ main structure for acceptance, projecting roof ladder, chimneys, parapets, pool house, computer room design and construction is complete.
⑶ own place.

Second business process
1, adding various impermeable layer of mortar sealing the sealant
⑴ grass-roots clean: base must be firm, clean and kept moist.
Effect of brush ⑵ cement: cement: dubbing = 1:0.03 (weight), coupled with water mixed with the synthetic pulp, casting on the roof, even sweeping with a broom again.
Mortar tight ⑶ depending on the design of the mixing ratio of raw materials, additives and cement sealant mixed 3% ~ 5%, mixture of good mortar fell on the roof, with an audit of the wooden yoke, the Using wood, shunping, another iron again put on the pressure.
D after 24 hours apart and brush effects of the manure, mix cement: waterproof, oil 1:0. 03. Appropriate watering.
⑸ after brushing good effect of mud, put a layer and the underlying surface waterproofing mortar with the same ratio.
Mortar tight ⑹ in person after the initial set, then brush with cement grout pigment, cement mix: 1:0 oil. 01 and the amount of water with mortar sealed tightly integrated surface in a great, compaction.

2, expansion of cement and non-shrinkage of the impermeable layer of cement mortar
⑴ base must be clean, solid and kept moist.
⑵ the mortar was mainly due to expansion and contraction-free formation of cement has good impermeability waterproofing effect, assay sample (volume) mortar cover of 0.4 ~ 0.5, with five shop-leather waterproof the same mortar.
Third, the quality standards
1, to ensure that the draft
⑴ waterproof mortar, waterproofing agents, mixing ratio of raw materials and hierarchical practices must comply with the requirements specification for the design and construction.
⑵ roof slopes should respect the design requirements.
Barrier layer impermeable to water ⑶ mortar layer between each battery must be combined with strong non-empty.
2, Tolerance
Surface roughness: 2 m walk and controls flared examiner, authorized deviation is 5 mm.
Four points of the construction of note
1, to avoid the common defect of project quality
Empty battery
1) base surface must be clean, rinse and moist but not water.
2) Brushing should be coated with cement grout with pavement, not premature coating to prevent induration dried or sup sweep water after dry cement powder grouting method to avoid sub uneven cement, rinse as ash layer dry and water too.
3) control the regularity of the grass-roots, check rule 2 m, the male and the female should not exceed 5 mm.
2, the main technical security measures
⑴ roof without a parapet around the scaffold must be higher than the fences of an M roof, and network security.
⑵ not free outside throwing debris fell on the floor, not to hurt people.
Vertical conveyor ⑶ with 1.5 m and a width of level, at the housing side railing.
3, product protection
⑴ streamline the flow of construction, avoiding premature human walking.
Note
⑵ of timely maintenance.
⑶ is not reached before the force, not to the next building process.

Henan Oriental Construction Machinery Co., Ltd. is a state-designated manufacturer and exporter of Road and Building construction machineries since 1989, We are the manufacturer ,supplier&exporter of semi-automatic and full-automatic dry mortar mixing plants,large and medium size of concrete mixing plants,all kinds of concrete mixers and cement silos,Rotary dryer Series,Mortar Spraying and Pump.

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