Ball valve sealing test machine

Abstract

The invention discloses a ball valve sealing test machine and aims to provide the ball valve sealing test machine which is convenient to operate, has high-accuracy test result and can guarantee that two pipe ends of a ball valve are prevented from being damaged by clamping. The ball valve sealing test machine comprises an air feeding pump, an air pressure sensor, a main frame, two push cylinders, two side frames, a main end cover and a secondary end cover, wherein the two push cylinders are respectively arranged on the side frames, a piston rod of one push cylinder is connected with the main end cover, a piston rod of the other push cylinder is connected with the secondary end cover, the main end cover is provided with a main elastic sealing ring pad, the secondary end cover is provided with a secondary elastic sealing ring board, and the main end cover is provided with a main cover air hole. The ball valve sealing test machine is advantaged in that, sealing and avoidance of damage to the ball valve can be guaranteed through positioning and clamping the ball valve in position, an adaptively-adjustable sealing structure is realized, the sealing effect during high-pressure detection can be strengthened, the ball valve sealing test machine has an auxiliary positioning structure, the end cover can be prevented from backspacing, the push cylinders are protected, the sealing effect is improved, and stability of the detection process is maintained.

Description

technical field [0001] The invention belongs to the technical field of ball valve airtightness testing, in particular to a ball valve airtightness testing machine. Background technique [0002] Ball valves are commonly used opening and closing parts for gas or liquid circulation. They are used in different occasions and have different sealing requirements. Therefore, they need to be tested for sealing before leaving the factory, otherwise there will be greater safety hazards. [0003] In the prior art, when testing a ball valve, a gasket or a sealing ring is usually placed on the outside of both ends of the ball valve, and at the same time, a force-applying device such as a jack or a hydraulic cylinder is used to clamp the two ends of the ball valve, so that the gasket or sealing ring and the ball valve are two The end is sealed, and the whole sealed ball valve is immersed in water, and then compressed gas is passed into the ball valve to test its sealing performance. [00...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned test method has the following disadvantages: 1. The operation process is complicated, and the weight of the frame is relatively heavy. It is necessary to immerse the frame in water with the help of external equipment, and the installation of the ball valve is also relatively troublesome; 2. The ball valve is sealed by pressing down the plate with a jack And when the sealing ring is placed outside the two ends of the ball valve and clamped on both ends of the ball valve by a hydraulic cylinder for sealing, the strength of both is difficult to control. The seal of the part is not reliable, which will affect the accuracy of the test and cause misjudgment of quality. If the force of pressing down or clamping is excessive, the ball valve will be deformed, causing the end surface (pipe end) of the ball valve to be uneven, thus making the ball valve It cannot form a seal with the pressure plate, which will lead to misjudgment of quality. In addition, if the force of pressing down or clamping is excessive, the ball valve may be directly damaged

Images