A method of using a valve welding port end pressure test sealing tool
A pressure test and tooling technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of sleeve tube pressure deformation, damage to the welding joint, etc., and achieve the effect of preventing pressure deformation
Active Publication Date: 2021-02-23
CHENGDU CHENGGAO VALVE +2
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Problems solved by technology
At present, during the pressure test, the clamping force of the pressure test machine directly acts on the valve and the sleeve to clamp and seal them, which easily deforms the sleeve and damages the welding joint
Method used
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] The method for using the pressure test sealing tool at the welding port end of the valve disclosed in the present invention, wherein the pressure test sealing tool at the welding port end of the valve includes the pressure test tooling, such as figure 1 As shown, the pressure test tooling 15 includes a base plate 1 and an annular sealing plate 4, the base plate 1 is provided with a positioning through hole 11, and one end face of the sealing plate 4 is coaxially provided with a first annular groove adapted to the sleeve, sealing The other end surface of the plate 4 is coaxially provided with an annular convex neck 41, one end surface of the bottom plate 1 has an annular groove adapted to the annular convex neck 41, and the other end surface of the bottom pla...
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Abstract
The invention relates to a method for using a pressure test sealing tool at the welding port end of a valve. The pressure test tool includes a bottom plate and a sealing plate, one end of the sealing plate has an annular convex neck, the other end of the sealing plate has a first annular groove, and the bottom plate There is an annular groove with the annular convex neck on one end surface, and a first sealing ring is arranged between the annular convex neck and the bottom plate. There is a second sealing ring in the first annular groove, and the inner diameter of the second sealing ring is smaller than that of the first sealing ring. Inner diameter; the method includes the following steps: step 1, install a pressure test fixture on the two arches of the pressure test machine; step 2, make the welding end of the sleeve on the valve contact with the sealing plate of the pressure test fixture. In the present invention, the pressure generated by the difference in sealing area acts on the sleeve, and the pressure causes the second sealing ring to be squeezed to generate compression, thereby realizing sealing; the pressure generated by the difference in sealing area is several times smaller than the original clamping force, The pressure on the sleeve can be far less than the extrusion stress of the sleeve, which can effectively prevent the sleeve from being deformed.
Description
technical field [0001] The invention relates to the technical field of valves, in particular to a method for using a pressure test sealing tool at a welding port end of a valve. Background technique [0002] In chemical and petroleum production, as long as there is fluid passing through, valves will be used. The importance of valves in chemical, petroleum, nuclear power and other projects is self-evident. At present, during the pressure test, the clamping force of the pressure test machine directly acts on the valve and the sleeve to clamp and seal them, which easily deforms the sleeve and damages the welding joint. Contents of the invention [0003] The invention aims to provide a method for using the pressure test sealing tool at the welding port end of a valve, which can not only seal but also protect the welding port. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is as follows: [0005] A method for using a valve...
Claims
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IPC IPC(8): G01N3/02G01N3/08
CPCG01N3/02G01N3/08G01N2203/0003G01N2203/0019
Inventor 杨燕飞王国虎胡建曾品其
Owner CHENGDU CHENGGAO VALVE