An anti-blocking method and device for pneumatically conveying concrete mortar

Abstract

The invention discloses an anti-blocking pipe method and device for pneumatically conveying concrete mortar, which mainly includes a material bin, a conveying pump, a conveying pipe, an air pressure sensor and a controller. The material bin holds the concrete mortar material, and the conveying pump pumps the material from the silo to the beginning of the conveying pipe. There is an air supply pipe at the beginning, and the air supply pipe inputs high-pressure gas to blow the material out through the conveying pipe. Get real-time working gas pressure. During normal feeding, the material in the conveying pipe is uniform, the working air pressure is basically constant, and the air pressure increases sharply when it is blocked. The controller reads the data of the air pressure sensor, and automatically judges the blockage according to the relationship between the real-time air pressure and the pressure threshold of the blocked gas. When blockage occurs, the controller controls to increase the air supply pressure, reduce the material pumping volume, and clear the pipeline until the working air pressure is within the normal range. When the working air pressure continues to be higher than the blocked gas pressure threshold, the controller automatically shuts down the delivery pump, and all the gas is used to dredge the pipeline.

Description

technical field [0001] The invention relates to the technical field of conveying mortar concrete, in particular to an anti-blocking pipe method and device for pneumatically conveying concrete mortar suitable for construction engineering, mining engineering and decoration engineering. Background technique [0002] Concrete reinforcement plays an important role in the fields of construction engineering, mining engineering and even decoration engineering. It only needs to mix cement, sand, stone, etc. with water in advance, and spray it directly on the surface to be sprayed after being transported for a certain distance. The sprayed materials High strength and even distribution. The whole equipment has simple process and is easy to operate. At present, concrete transportation usually adopts pumping method, that is, hydraulic power is used to transport concrete to a certain distance through the delivery cylinder, but this method has the following problems: (1) When the material...

AI Technical Summary

Problems solved by technology

At present, concrete transportation usually adopts pumping method, that is, hydraulic power is used to transport concrete to a certain distance through the delivery cylinder, but this method has the following problems: (1) When the material ratio is not well controlled, pipe blockage is prone to occur; ( 2) It is difficult to clean the pipe wall, and usually needs to be cleaned with a lot of water

However, in view of the fact that the delivery pipe is opaque, the material delivery cannot be seen with the naked eye, so the realization of the above anti-clogging pipe delivery method faces the following difficulties: ① How to judge the blockage location in time: the delivery pipe is opaque, and the blockage is difficult to judge, let alone in time judge

② How to unclog in a timely and effective manner: Even if the clogging location is found, there is no effective way to unclog it, and secondary clogging still occurs frequently, that is, the delivery pump is still continuously discharging material, resulting in a rapid increase in the distance of the clogged pipe, and the mortar or concrete is not as dry. The material can be dredged under heavy impact, and the degree of hardening of the mortar concrete increases over time, and the difficulty of dredging is significantly improved

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