Device for testing air tightness of four-way valve

Abstract

The invention discloses a device for testing the air tightness of a four-way valve. A cylinder body of a cylinder is fixedly connected with a rack; a piston rod is fixedly connected with an elevating mechanism; the elevating mechanism is in sliding fit with a guide track of the rack so as to make linear reciprocated movement; a space for accommodating the four-way valve is arranged between a pressing plane and a rising plane of the elevating mechanism; the elevating mechanism is used for respectively applying action forces with opposite directions to the wall of a main tube along the radial direction of the main tube of the four-way valve through the pressing plane and the rising plane; four plugging columns are fixed on the rack; and the head parts of the four plugging columns are respectively provided with sealing heads for sealing nozzles of branch tubes of the four-way valve correspondingly; and a limiting rod is fixed on the rack and can be used for preventing the piston rod from moving continuously along the original direction while the sealing heads of the four plugging columns accomplish the sealing to the nozzles of the branch tubes of the four-way valve. With the adoption of the device, the labor cost can be reduced, and the measuring efficiency can be increased.

Description

technical field [0001] The invention relates to a four-way valve air-tightness test device, in particular to a four-way valve air-tightness test device in the automatic production process of the four-way valve. Background technique [0002] Four-way valve, hydraulic valve term, is a control valve with four ports. The four-way valve is an indispensable part of refrigeration equipment. Its working principle is that when the solenoid valve coil is in a power-off state, the pilot slide valve moves left under the drive of the compression spring on the right side, and the high-pressure gas enters the capillary tube and then enters the piston chamber at the right end. On the one hand, the gas in the piston chamber at the left end is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the left, so that the exhaust pipe is connected to the connecting pipe of the outdoor unit, and the other two connecting pipes are...

AI Technical Summary

Problems solved by technology

[0004] 1. Low 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;

[0005] 2. The test 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;

[0006] 3. Most pilot valve air tightness test devices require an operator for each station, which has high labor costs and low production efficiency, and is not suitable for large-scale production;

[0007] 4. Although the material of the valve body is made of copper, the water inspection will still cause a certain degree of corrosion to the valve body, thus affecting the life of the product;

[0008] 5. 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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