Ball valve testing device

Abstract

The invention discloses a ball valve testing device. The ball valve testing device is convenient to operate, the accuracy of a testing result is high, and it can be guaranteed that two pipe ends of a ball valve are not likely to be damaged under clamping. The ball valve device comprises an air supply pump, an air pressure sensor, a main rack, two pushing plate air cylinders, two lateral racks, a main end cover and an auxiliary end cover. The two pushing plate air cylinders are arranged on the two lateral racks respectively, a piston rod of one pushing plate air cylinder is connected with the main end cover, and a piston rod of the other pushing plate air cylinder is connected with the auxiliary end cover. A main elastic seal ring gasket is arranged on the main end cover, an auxiliary elastic seal ring plate is arranged on the auxiliary end cover, and a main cover air hole is formed in the main end cover. The ball valve testing device has the advantages that the ball valve is positioned and clamped in place, seal performance can be guaranteed, and the ball valve will not be damaged under claming; a self-adaptation adjusting seal structure is arranged, so that the sealing effect is improved in high-air-pressure detection; an auxiliary positioning structure is arranged, in this way, end cover retreat can be avoided, the pushing plate air cylinders can be protected, the sealing effect can be improved, and stability in detection can be maintained.

Description

technical field [0001] The invention belongs to the technical field of ball valve air tightness testing, and in particular relates to a ball valve testing device. 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. [000...

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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

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