The main points of fine stone concrete pumps pumping
The fine stone concrete pump is a special type of concrete pump. This concrete pump is widely used in floor heating projects and floor construction, so it is welcomed by the majority of construction parties. So on the construction site, what are the pumping requirements of the fine stone concrete pump? Now let’s take a closer look.
Experts pointed out: Fine stone concrete pumps have been widely used in major construction units. In order for this kind of concrete pump to be successfully constructed during construction, certain pumping requirements must be followed. For example, a screen should be installed on the pump hopper to isolate the large rocks. The screen size should match the large particle size of the concrete aggregate. There is a dedicated person to monitor, once a large piece of material is found, it should be removed in time. Specifically, its pumping requirements can start from the following points.
1 Prepare the fine stone concrete pump before pumping. Before pumping, pay attention to the concrete hydraulic pressure meter and the working conditions of each part. Generally, the outlet of the fine stone concrete pump is prone to blockage. In case of blockage, the pump should be reversed to return the blocked concrete, and then pump it after it is evenly mixed. If no effect is seen, the pump should be shut down to remove the blockage.
2 Key points during pumping During the pumping process, the concrete should be continuously supplied. If continuous feeding is not possible, the pumping speed of concrete can be slowed down. In addition, when the pump is out of joint, the pump cannot stop working. Instead, the concrete pump rotates forwards and backwards every 4-5 minutes to prevent the agglomeration or precipitation of the mixture in the pipeline. If the pumping stops for more than 45 minutes, It should be cleaned before pumping again.
When pumping concrete, keep a certain amount of concrete in the hopper continuously. This can prevent air from entering the hopper, causing the concrete to flow backwards and forming blockages. If this problem occurs, the pump needs to be reversed to make the concrete Return to the hopper and perform normal pumping when the air is out.
It is worth noting that during the pumping process, the water in the washing tank should be changed every 2 hours, and the stroke of the pump cylinder should be checked at the same time. If there is any change, it can be adjusted in time. In addition, in order to reduce the uneven wear of the inner wall of the cylinder, it is better to start a long stroke. Only when starting and when the concrete slump is small, short-distance pumping of concrete is carried out.
3 Points of vertical pumping When concrete is being transported vertically upwards, the water hammer will cause the concrete to flow backwards and the transport efficiency will decrease. The higher the transport pipe, the more obvious the phenomenon. To solve this problem, the correct solution is to set a horizontal pipe of more than 10 meters between the pump and the vertical pipe to offset the impact of the concrete falling impact; and a stop valve should be added near the discharge port of the concrete pump.
In addition, when constructing under high temperature, care should be taken to cover 2 layers of wet grass curtains on the horizontal conveying pipe to prevent sunlight, and spray water regularly to prevent the pipeline from being blocked.