Welding ball valve test fixture and use method thereof

Abstract

The invention discloses a welding ball valve test fixture and a use method thereof. The welding ball valve test fixture comprises a chuck, wherein a stepped hole is formed in the chuck, a welding joint is inserted into the stepped hole, and an O-shaped ring in sealing fit with the welding joint is arranged on the inner wall of the stepped hole; a clamping groove is formed in the outer wall of thewelding joint, a sliding hole communicating with the stepped hole is formed in the chuck, a spring bolt is glidingly connected in the sliding hole and clamped in the clamping groove in a matched manner, and the welding joint is limited; and a driving mechanism for driving the spring bolt to move up and down is also arranged on the outer wall of the chuck. The butt joint type in the prior art is changed into a sleeving type, the welding joint is inserted into the chuck and extrudes the O-shaped ring, so that the O-shaped ring is tightly extruded and attached to the outer wall of the welding joint, sealing is completed, and the spring bolt is clamped with the clamping groove in the welding joint to limit and fix the welding joint. The whole device is easy to operate and convenient to fix, can be independently fixed by one person without assistance of tools such as a wrench and the like, is simple and efficient and saves time and labor.

Description

technical field [0001] The invention relates to the technical field of a welded ball valve test device, in particular to a welded ball valve test fixture and a use method thereof. Background technique [0002] Welded ball valves are widely used in various fields. Its superior quality and high performance stability cannot be achieved by ordinary cast steel ball valves. The service life of fully welded ball valves is much longer than that of cast steel ball valves. Fully welded ball valves are widely used in city gas , urban heating, petrochemical, shipbuilding, steel, pressure regulating stations, power plants and other pipeline equipment. As a very important part of the hydraulic pipeline installed by electromechanical valves, its quality needs to be stable and reliable. Especially in thermal pipelines, in order to avoid quality problems caused by defects such as trachoma, cracks, and poor sealing of the valve itself, it is necessary to test the valves one by one before the...

AI Technical Summary

Problems solved by technology

Especially in thermal pipelines, in order to avoid quality problems caused by defects such as trachoma, cracks, and poor sealing of the valve itself, it is necessary to test the valves one by one before the valve is installed. During the test, when the welded joint is connected to the test line Generally, the welded joint and the chuck are butted, and a sealing gasket is arranged between the welded joint and the chuck, and then the chuck and the welded joint are locked by a clamp. At present, this method has the following problems: (1) In When docking, it is not easy to ensure that the central axes of the two coincide, and the sealing gasket is easy to run around, resulting in a tight seal; (2) When assembling, two people are required to cooperate. One person supports the butt joint between the chuck and the welded joint, and the other uses the clip Locking the hoop is time-consuming and laborious, and requires the cooperation of multiple people; (3) The hoop is tightened by bolts, and tools such as wrenches are needed, which is not very convenient to operate; in addition, if the bolts are not tightened tightly, the problem of poor sealing is likely to occur ; not conducive to follow-up testing

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