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Welding ball valve test fixture and use method thereof

A technology for testing fixtures and ball valves, which can be used in mechanical valve testing, manufacturing tools, workpiece clamping devices, etc., and can solve problems such as time-consuming, laborious, cracking, and poor sealing

Inactive Publication Date: 2020-10-23
NINGBO HUACHENG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Welding ball valve test fixture and use method thereof
  • Welding ball valve test fixture and use method thereof
  • Welding ball valve test fixture and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like Figure 1-2 As shown, at present, the welding joint 4 is connected to the test line. Generally, the welding joint 4 is docked with the chuck 1, and an O-ring 2 is arranged between the welding joint 4 and the chuck 1, and then the clamp is clamped by the clamp 3. The head 1 and the welding joint 4 are locked, considering the problems in the background technology, such as Figure 3-4 As shown, this embodiment proposes a welded ball valve test fixture, including a chuck 1, a stepped hole is opened inside the chuck 1, a welded joint 4 is inserted in the stepped hole, and a welded joint 4 is provided on the inner wall of the stepped hole to cooperate with the welded joint 4. The O-ring 2 plays a sealing role; the outer wall of the welding joint 4 is provided with a card slot 41, and the chuck 1 is provided with a slide hole communicating with the stepped hole, and a lock tongue 8 is slidably connected to the slide hole, and the lock tongue 8 cooperates with the card Co...

Embodiment 2

[0047] like Figure 5-6 As shown, on the basis of Embodiment 1, this embodiment proposes a welded ball valve test fixture, wherein the connector 5 is a bolt; the spring 91 seat 9 is also connected to the buckle 6, and the buckle 6 is provided with a through cavity. The bolt extends to the outside through the cavity; the bottom of the buckle 6 is provided with a groove 61, and the end of the seat 9 of the spring 91 is clamped in the groove 61.

[0048] The bolt is also threaded with a nut 7, the nut 7 is in contact with the end face of the seat 9 of the spring 91, and the height of the dead bolt 8 can be adjusted through the nut 7.

[0049] The present invention is designed with two different deadbolt 8 driving devices, which are ingenious in design and reasonable in structure. The designed wrench adopts the principle of leverage to save labor; the designed lifting buckle 6 is more stable when the limit is fixed; no matter what kind of driving It is very convenient to use, and...

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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...

Claims

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Application Information

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IPC IPC(8): B25B11/00G01M13/003
CPCB25B11/00G01M13/003
Inventor 王朝阳杨月红吕建苗连超燕祝云霞吕强
Owner NINGBO HUACHENG VALVE
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