What are the tips for using concrete pumps when operating

When operating the concrete pump, you must pay attention to the following tips about the hose!

1. Before the start of pumping, the operator of the hose communicates well with the pump opening personnel, the bending radius of the front hose should be greater than 1m, and the operator is not allowed to stand at the outlet of the pipe to prevent the concrete from suddenly spraying out and hurting people.

2. The hose of the concrete mixer pump should be fixed and solid. It is strictly forbidden to bend the hose of the agitator pump to avoid the hose**. This is also one of the reasons why the mixing pump is blocked, when the pipeline is blocked, when pumping after treatment, the end of the soft joint will swing rapidly, and the concrete may be sprayed instantaneously, and the staff must not approach the hose.

3. Pay attention to standing in the corner of the building when operating the hose of the concrete mixer pump, because the hose is soft, there may be shaking or concrete spraying when pumping concrete, which may lead to the danger of falling.

The above is the precautions for the operation of the hose of the concrete mixer pump, and Taurus Heavy Work is a responsible mixer pump manufacturer, for all the equipment after delivery, will arrange a special person to conduct one-on-one door-to-door training to help customers master the construction skills and related precautions as soon as possible.

When concrete is pumped, what are the requirements for concrete.

When concrete is pumped, what are the requirements for concrete? Hello, happy to answer your <>. When the pro-concrete is pumped, what are the requirements for the concreteThe requirements for the mix ratio of the pumped concrete are as follows:

The ratio of the maximum particle size of coarse aggregate to the diameter of the conveying pipe: the pumping height is less than 50 meters, the gravel should not be greater than 1:3, and the pebble should not be greater than 1:

The pumping height is 50-100 meters, and it is advisable to be at 1:3 1:4; When the pumping height is more than 100 meters, it should be at 1:

4~1：5；Fine aggregate should be medium sand, and the sand passing through the sieve hole should not be less than 15%; The relative pressure of the mixture is not more than 40% of the water secretion S10; Concrete slump selection values for different pumping heights: the pumping height is less than 30 meters, and the slump is 100-140mm; The pumping height is 30-60 meters, and the slump is 140-160mm; The pumping height is 60-100 meters, and the slump is 160-180mm; The pumping height is more than 100 meters, and the slump is 180-200mm; The water-cement ratio should be; The sand rate is 38%-45%; The minimum cement dosage is 300kgm3.

When the concrete starts to be pumped, it should be kept running at a slow speed, and the pump pressure should not exceed 20MPa and the operation of each part should be maintained, and the pumping should be carried out at normal speed after confirming that everything is normal. When pumping concrete downward, the angle between the perpendicular line and the pipeline should not be less than 120 to prevent the concrete from being blocked due to the formation of empty sections due to the fall of its own weight. High-strength concrete should be pumped into the pump within 1 2 initial setting time, and poured before the initial setting, to maintain continuous pumping, in order to maintain the continuity of pumping, reduce the pumping speed if necessary.

If the pump is stopped for 15 minutes, the pump should be turned on every 5 minutes, and in order to prevent the concrete segregation in the hopper, the hopper agitator should be started at the same time as the reverse and forward rotation. If the pump is stopped for 45 minutes, the pump should be flushed. 1.

The joints of cast-in-place components designed according to different strength grades must follow the principle that low-grade concrete cannot flow into high-grade concrete parts during construction. The construction joints of the two types of concrete should be left in the low-strength grade component and a distance from the edge of the high-strength grade component2The concrete should meet the needs of pouring strength, ensure that the concrete pump can work continuously, and ensure that it does not know to produce cracks intermittently.

3.The conveying pipeline should be straight, the turning should be slow, and the joints should be tight. If the pipe is inclined downward, there should be a horizontal pipe with a length greater than 15m at the outlet of the pump, and the pump port should be emptied to prevent blockage caused by mixed air.

4.Before pumping, lubricate the inner wall of the conveying pipe with an appropriate amount of cement mortar of the same composition as the concrete. When the concrete is segregated or the pumping interval is expected to exceed 45 minutes, the remaining concrete in the pipe should be immediately rinsed with pressurized water or other methods.

When pumping, there should always be enough concrete in the receiving hopper to prevent the intake of air from forming a blockage. Hope mine can help you <>

Do you have any other questions?

What are the measures for the safe use of concrete pumps in building construction? Oozing tremor.

The concrete pumps used in the project mainly include HBT80 ground pumps and automobile pumps.

1) The concrete pipe fixing device is used to fix the conveyor pipe on the cement floor and wall, and the installation height is about 250mm away from the floor or wall, which can be determined according to the actual construction situation; The base plate is fastened with 4 expansion screws of M20 90.

2) Check all parts of the pump body, oil circuit system and electrical system before the shift, and start the pump after everything is normal.

3) Ensure that the attached wall connection between the pipe joint and the vertical section is firm and reliable, and check the tightness of the bolt frequently to prevent accidents caused by loosening.

4) At the same time, use the parking brake and locking brake of the pumping equipment, wedge the tires, and ensure that the water source is normal and the water tank is full of clean water.

5) Equip the cleaning supplies for the cleaning tube.

6) Keep a certain amount of concrete in the hopper during pumping, and do not empty it.

7) Clean the pump body and pipeline after stopping the conveying for the next time.

8) Pipe plugging fault treatment and prevention.

If pipe blockage occurs, its location generally appears at the horizontal section of the bend or cone pipe, especially at the elbow where the horizontal section meets the vertical pipe. The treatment method of pipe blockage is to first carry out reverse pump dredging, and other personnel use hammers to hit the pipe blockage part. If the pipe blockage is invalid, close the hydraulic gate valve first, remove the concrete in the pipe blockage after the pressure is relieved, connect the pipeline, open the hydraulic gate valve and continue pumping.

Preventive pipe blocking measures: When pumping the upper floors, the concrete slump is controlled between 180 and 220mm, and at the same time, zeolite powder can be mixed to reduce water leakage in order to prevent concrete segregation.

9) Pipe burst fault handling and prevention.

Burst pipes generally appear in pipes near the outlet end of the pump, especially at the elbow where the horizontal section meets the vertical pipe. Solution: Close the hydraulic gate valve at the vertical pipe and horizontal pipe and replace the pipe.

Precautionary measures: The slag is regularly tested with an infrared thickness gauge to detect the thickness of the horizontal section and the vertical initial section of the conveying pipe, and the thickness is less than 4mm.

10) Placing machine.

Before the installation and use of the cloth machine, all parts should be strictly inspected, and the connecting parts should be clean and free of dirt, no cracks, rust and other unsafe factors, and must be sensitive and reliable. The installation and placement of the operating platform should be stable, safe and secure, and can only be used after inspection and acceptance meet the requirements.

When pumping concrete construction, the following matters should be paid attention to in the construction:

1) The concrete pump must be guaranteed to work continuously.

2) The layout of the conveying pipeline should be as straight as possible, the turns should be few and gentle, and the pipe and pipe joints should be tight.

3) Before pumping, the inner wall of the conveying pipe should be lubricated with an appropriate amount of cement slurry or cement mortar with the same composition as the concrete.

4) When it is expected that the pumping interval time is exceeded or the concrete segregation phenomenon occurs, the remaining concrete in the pipe should be cleaned immediately with pressure water or other methods.

5) When pumping concrete, there should always be enough concrete in the receiving hopper to prevent the formation of blockage by inhaling air.

6) When transporting concrete, long-distance concrete should be transported first, so that the pipeline can be gradually dismantled with the gradual completion of concrete pouring work.

There is no big problem with continuous operation, if there is a stay phenomenon in the middle, according to the state of the concrete and the height and shape of the pump pipe, it is necessary to pump a few times from time to time to ensure the normal construction of the pump, and the pump pressure is generally about 75%, but it is still more practical.

To be honest, after a long time of pumping, I naturally have a little experience!

Specifically, it is necessary to look at the material, there are several materials that cannot be beaten, 1 The material that is too dry has reached the level that it will not flow. 2. Segregated material, material separated from cement slurry. 3. The over-mixed material of the admixture will scratch the wall and is easy to block. 4 There are too many stones.

There is also to avoid misunderstandings, not the thinner the material, the better it is to play, but to see the workability, generally the slump of the material is between 140-80mm, the material is wrapped better with each other, and it has fluidity. Do not add water all the time, as this will destroy the workability of the material.

There is also a mixer truck to turn quickly before the feeding, and the material is stirred, because there are mixer truck drivers who will add water or water to the construction site, and there are also those who listen to the drum in the middle, and the material feed trough will be segregated if the material is not opened.

The most important thing is to listen to the sound, to look at the pressure gauge, when to increase the pressure, when to reduce the pressure, when to return to the pump, it is very important to avoid emptying the pump (despise those who sleep while pumping, and don't know when it is empty).

Will listen to the sound of dismantling the pipe, if you have to dismantle it every time you block it, it is estimated that you will not be tired to death, and the plumber will beat you. It's hard for you to think about not blocking the tube once, so learn it.

There is also to remember to keep the material to maintain the pump, and cutting off the material is a taboo for blocking the pump!

Note: To be a one-to-two mortar Pumping cement mortar with the same mix ratio of other components outside the coarse aggregate inside the concrete The pumping speed should be slow first and then fast Pumping is necessary to pump continuously, if it must be interrupted, it cannot exceed the pumping requirements of the concrete When pumping concrete, the piston should maintain the maximum stroke of the operation, if the air is sucked in, it should be vertical and counter-pumping, and the hose should be connected to more than three meters when pumping.

Treatment of the problem of pumping concrete freezing pump in winter.

The exit temperature must be guaranteed;

The pumping time should be reasonably controlled, and the concrete should not be allowed to stay in the pump pipe for too long;

Empty the concrete when moving the pump;

Moisten the pump with hot water;

Insulation measures can be considered for pump tubing.