A fully automatic slurry spraying equipment

Abstract

The invention discloses a fully automatic slurry spraying equipment and relates to the field of slurry spraying equipment. Including: automatic metering and feeding device, mixing tank, slurry discarding structure, screw pump, nozzle, control cabinet, vehicle body, automatic metering and feeding device is connected with the mixing tank through the feeding pipe, and the bottom of the mixing tank is fixedly connected with the discarding slurry structure, The slurry disposal structure communicates with the feeding port on the screw pump through the slurry outlet pipe. The feeding section of the screw pump is connected with air pipes and water pipes. The outlet section of the screw pump communicates with the slurry inlet channel of the nozzle through the slurry outlet hose. The discharge section of the pump is provided with an air jet port connected in parallel with an air pipe. The invention adopts the combination of water washing and air washing to realize automatic cleaning, reduce the blockage of the slurry pipeline of the equipment, realize automatic pulping, ensure the water-binder ratio of the slurry, adjust the spraying speed, and meet the spraying needs of different products. The separate conveying method reduces the wear of the slurry pipeline and reduces the wear of the nozzle.

Description

technical field [0001] The invention relates to a slurry spraying equipment, in particular to a fully automatic slurry spraying equipment. Background technique [0002] Prestressed steel cylinder concrete pipe (PCCP) is widely used in my country's South-to-North Water Diversion and other major water diversion and water conservancy construction projects and urban water supply network construction projects due to its large-diameter, high-pressure, deep-covered soil, and long-distance excellent characteristics. The durability of the prestressed high-strength steel wire wound on the core directly affects the structural safety of the PCCP. The national standard GB / T19685 "Prestressed Steel Cylindrical Concrete Pipe" requires spraying cement slurry with a specified water-cement ratio when winding the wire to provide the first effective protection for the surface of the steel wire. The water-to-binder ratio of the cement paste on the surface of the steel wire is 0.625, which has a ...

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Problems solved by technology

[0003] In the prior art, on-site grouting is mainly manual operation, which is time-consuming and labor-intensive, while the control of the water-binder ratio mainly depends on the experience of the operator. In addition, the low water-binder ratio is conducive to the smooth operation of the spraying system. Therefore, in actual work, the water-binder ratio lower than technical requirements

If the amount of slurry is too large at one time, the spraying cannot be guaranteed before the initial setting of the cement slurry, which will seriously affect the quality of the spraying

[0004] Generally, when cleaning, the workers directly use the water pipe to clean the mixing tank. First, it is laborious. Second, if the workers are not responsible, the cleaning will not be in place or thorough. The cleaning wastewater will be cleaned along the slurry pipeline and finally sprayed directly from the nozzle. It affects the operation of workers, and the nozzle is generally facing the concrete pipe in operation. If the residual slurry and waste water during cleaning are sprayed on the concrete pipe, it will affect the spraying quality of the pipe; the traditional straight pipe or flat pipe nozzle sprays unevenly and the atomization is not good , and the nozzle is severely worn and needs to be replaced frequently

[0005] The screw pump for conveying mud is generally a horizontal structure. There is a gap between the bottom of the delivery rod and the wall of the cylinder. The specific gravity of the mud is large, so it is easy to deposit on the wall of the cylinder. The traditional screw pump is not easy to clean. Over time, the bottom of the cylinder wall will solidify A thick layer of mud will affect the transportation of mud, and it is easy to generate mud and block the mud path

[0006] In the prior art, the grouting speed is fixed, but when the rotational speed and diameter of the concrete pipe change, the amount of grouting per unit area will change accordingly. If the same set of spraying equipment is used, the spraying quality requirements cannot be met.

[0007] In addition, in the prior art, the mixing of mud and air is premature, and the flow rate of the slurry-air mixture in the spray pipe is very fast, which causes serious wear and tear on the pipeline and nozzles, especially the nozzles need to be replaced frequently, which increases the cost of the enterprise

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