Pilot valve air tightness testing device

Abstract

The invention discloses a pilot valve air tightness testing device, which comprises a high-pressure air inlet mechanism of a tube E, a closing mechanism of a tube S, a high-pressure air inlet mechanism of a tube C, a closing mechanism of a tube D and a stainless steel reflector. The high-pressure air inlet mechanism of the tube E, the closing mechanism of the tube S, the high-pressure air inlet mechanism of the tube C and the closing mechanism of the tube D are respectively connected with the tube E, the tube S, the tube C and the tube D of a pilot valve, and the stainless steel reflector is mounted right below the pilot valve. The pilot valve air tightness testing device is high in detection automation degree, realizes automation of sealing processes of the various tubes of the pilot valve, saves labor cost and improves testing efficiency; before air tightness is detected, a mechanical structure is used for applying force onto an O-shaped ring and leads the O-shaped ring to deform, so that the sealing effect of the various tubes is good, and testing precision is guaranteed; the stainless steel reflector is mounted and brings convenience for an operator to observe the condition of air leakage of the lower half portion of the pilot valve, and reliability of test results is improved; and the pilot valve to be detected is soaked into water or raised from the water by the mechanical structure, so that detection time is greatly shortened.

Description

technical field [0001] The invention relates to a pilot valve air tightness test device, in particular to a pilot valve air tightness test device in the automatic production process of a pilot valve. Background technique [0002] The pilot valve is one of the important components of the four-way valve. It is mainly composed of the pilot valve body, C pipe, S pipe, E pipe and D pipe. The reversing of the pilot valve drives the reversing of the four-way valve, so that the mutual conversion of cooling and heating of the refrigeration system can be realized. Whether there is leakage between the pilot valve body and the pipes (that is, whether the airtightness of the pilot valve is good) is directly related to the performance of the four-way valve and even the quality of the refrigeration system. Therefore, in the production and product factory testing of enterprises, it is very important to test the air tightness of pilot valves. The existing domestic pilot valve air tightness...

AI Technical Summary

Problems solved by technology

The existing domestic pilot valve air tightness test devices generally have the following problems: 1. Low degree of detection automation

Manually immerse the valve in water directly after ventilating the valve body during the testing process, and manual participation is required throughout the testing process; 2. The testing accuracy is low

During the testing process, due to the lack of good pressure maintenance, the gas passing into the valve body leaks when it is not immersed in water, resulting in inaccurate test results; 3. Most air tightness test devices for pilot valves require Assigning an operator to each station, the labor cost is high, the production efficiency is low, and it is not suitable for mass production; 4. Since the test process is not automated, the unskilled operation of the operator will cause the test speed to be slow

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