Before pumping concrete, why should we pump pipe-wetting mortar first?

Pumping concrete, every machine, has its principle.

Before pumping concrete, the pipeline must be lubricated with cement mortar configured according to regulations.

The cement slurry wets the pipeline to wet and lubricate it, to prevent the concrete from sticking to the pipeline and washing it, and to check whether the pipeline is unblocked.

The concrete steps of wetting the pipeline before pumping concrete are as follows: ① water is injected into the pump pipe, and the amount of water injected is about 25% of the volume of the pump pipe; (2) The length of the inner seal section of the pump pipe is about 1m, which is mainly used to drive away the excess water in the front section; (3) injecting cement mortar into the pump pipe, and the grouting amount is 30% of the volume of the pump pipe; (4) conveying concrete.

When the pump pumps concrete after the pipeline is wet, it is always necessary to observe the pump pressure, make preparations for operation, calculate the concrete pouring amount, and at the same time direct the operator to keep in touch with the on-site pouring personnel during the process. In the process of pipeline wetting, the joints between pipelines should be inspected, and the sealing ring at the joints of leaking pipelines should be replaced in time to prevent slurry leakage.

After the completion of concrete, concrete pumps and pipes should be cleaned in time. Improper cleaning method of pump pipe can easily lead to pipeline blockage. If the concrete pump or pipeline is not cleaned, a large amount of sand and gravel will remain, causing unnecessary pipeline blockage and serious losses in the next concrete transportation construction.

This is to test whether there is any blockage inside, and take out the dry slag by the way.

A machine for continuously conveying concrete along a pipeline by pressure. It consists of a pump body and a conveying pipe. According to the structure, it is divided into piston type, extrusion type and hydraulic diaphragm type. The pump body is installed on the automobile chassis, and then it is equipped with a telescopic or flexible distribution rod to form a pump truck.

Concrete pump truck is transformed from the chassis of truck, equipped with motion and power transmission device, pumping and mixing device, distribution device and other auxiliary devices.

The power of the concrete pump truck transfers the power of the engine to the hydraulic pump group or the rear axle through the power transfer box, and the hydraulic pump pushes the piston to drive the concrete pump to work. Then, the concrete is transported to a certain height and distance by using the placing boom and conveying pipe on the pump car.

Before pouring ingots or steel castings, the pouring site should be carefully inspected to eliminate hidden dangers of accidents, and the steel drums should be inspected. If the machine is out of order, the lining is burned to a thickness exceeding the specified thickness, and the plug brick does not match the nozzle brick, it should be stopped.

When checking the inner wall of ingot mould or steel drum, 36V safe voltage lamp must be used. After the steel drum is hoisted to the bottom of the tapping trough, it is not allowed to work in the drum. If inspection is needed, the steel drum must be hoisted out of the steel trough.

Intestines are not lubricated and constipation is easy.