Automatic air compensation device

Abstract

Disclosed is an automatic air compensation device. An auxiliary piston cavity, a main piston cavity and a connecting rod cavity are formed in a valve body, and the auxiliary piston cavity is communicated with the main piston cavity through the connecting rod cavity and is internally provided with an auxiliary piston; a connecting rod is mounted in the connecting rod cavity, a main piston is arranged in the main piston cavity, the two ends of the connecting rod can be in contact with the auxiliary piston and the main piston, and the area of the auxiliary piston is smaller than the area of the main piston; the main piston cavity is divided into a front cavity body and a rear cavity body through the main piston, an annular groove is formed in the periphery of the front end of the connecting rod cavity, and the annular cavity is communicated with the connecting rod cavity and the auxiliary piston cavity; the auxiliary piston can seal the front end of the annular groove, an air scattering hole is formed in the connecting rod, and the rear end of the air scattering hole is communicated with the rear cavity body; and the number of inside ventilation pipelines is small, a pipeline between an air inlet and an air outlet of the device is a straight pipeline, the airflow resistance is greatly reduced, and therefore the air blowing blockage removing effect is better.

Description

technical field [0001] The invention relates to an automatic air replenishing device suitable for a pneumatic material conveying system. Background technique [0002] In the granular material conveying system widely used in thermal power, metallurgy, chemical industry and other fields, there is a problem that the material often blocks the pipe. The method for solving the above problems is mostly to install a high-pressure gas blowing valve connected with the compressed air pipeline on the material delivery pipeline. When the pipe is blocked, the device instantly fills a large amount of high-pressure gas into the conveying pipe to blow away the blocked material and make the pipe unblocked. The existing blowing aid valves all need an independent detection device to detect the phenomenon of material blockage and increase the pressure in time, and to control the blowing of high-pressure gas to remove the blockage. However, the existing detection devices have the following defi...

AI Technical Summary

Problems solved by technology

However, the existing detection devices have the following deficiencies: 1. They are all composed of complex and expensive electrical components, and their cost is high. In addition, the electrical components are not suitable for the harsh working conditions of the particle material conveying system, and the failure rate Extremely high; 2. The ventilation pipeline is exposed to the outside of the valve body. During use, the exposed pipeline is often aged or damaged and cannot supply air normally; 3. The number of ventilation pipelines is large and interlaced, making it difficult to manufacture and costly. High, poor running stability

Therefore, the existing high-pressure gas-assisted blowing valve cannot meet the actual use needs of users

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