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Fixed ball valve

A technology of ball valves and ball seats, which is applied in the field of assembly structure of ball seats and seat rings, can solve the problems of partial wear and sealing performance of sealing surfaces, decline, etc., achieve stable pressure relief points, improve processability and assembly, and ensure strength Effect

Active Publication Date: 2019-09-17
KITZ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in either case, where the fluid is at high pressure, with Figure 14 Similarly, the ball seat elastically deforms in the opening direction, and the contact with the ball valve body changes from surface contact to line contact, which may cause partial wear on the sealing surface and reduce the sealing performance

Method used

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  • Fixed ball valve
  • Fixed ball valve
  • Fixed ball valve

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Embodiment Construction

[0091] Hereinafter, embodiments of the fixed ball valve of the present invention will be described based on the drawings. exist figure 1 In , one embodiment of the fixed ball valve of the present invention is shown as the valve open state, in image 3 in, means figure 1 The J-J sectional view of , that is, the central cross-sectional view of the fixed ball valve of the present invention.

[0092] figure 1 The fixed ball valve (hereinafter referred to as the valve body 10) has a valve body 11, a ball 12, a valve stem 13, a seat ring 14, and a ball seat 15. High-pressure fluid with the use of the case.

[0093] The valve body 11 has an annular valve body 20 and annular caps 21 , 21 on both sides, which are made of carbon steel or stainless steel, and are integrated with bolts and nuts 22 .

[0094] In the valve body 11, a ball 12 is rotatably provided via a valve stem 13 composed of an upper valve stem 13a and a lower valve stem 13b, and seat rings 14 are provided on both ...

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PUM

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Abstract

A seat ring (14) equipped with a ball seat (15) is arranged on one or both of the ball (12) with a through hole (12a) in the valve body (11), and the ball (12) passes through the valve The rod (13) is provided rotatably, and the ball seat (15) is fitted in a fitting groove (32) formed on the race (14) in a state of being free from jumping out. For the remaining pressure caused by the abnormal pressure increase in the chamber (35) when it is fully closed or fully opened, the seat (14) is turned in the opposite direction to the ball (12) by the self-tightening force utilizing this pressure Move, and push the ball seat (15) to the ball (12) side with the remaining pressure flowing into the back side of the ball seat (15) in the assembly groove (32), through the inner circumference of the ball seat (15) The communication part (40) between the surface (27) and the assembly groove (32) releases pressure into the flow path.

Description

technical field [0001] The present invention relates to a fixed ball valve, and specifically relates to an assembly structure of a ball seat and a seat ring capable of exhibiting high sealing performance against high-pressure fluid. Background technique [0002] A fixed ball valve is known as a valve particularly suitable for high-pressure fluids, and is generally configured as follows: a ball seat as a valve seat is fitted to the valve body while being held by a seat ring, and the ball seat is pushed toward the valve body by the rebound force of a coil spring. The valve body bounces in the direction, is pushed through the ball seat, and the fluid is closed with the primary side (upstream side) ball seat. [0003] In this way, when the ball seat and the seat ring are separated, the structure that prevents the ball seat from falling off from the seat ring is adopted. There are male threads on the body, and the sealing ring is installed on the seat through these female thread...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/06
CPCF16K5/0678F16K5/202F16K5/0689F16K5/201F16K27/067F16K5/06
Inventor 船渡正澄风间正裕
Owner KITZ CORP