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Soft sealing gate valve

A technology of soft sealing and gate valves, applied in the direction of sliding valves, valve details, valve devices, etc., can solve the problems of reducing the service life of gate valves, increasing the wear of valve plates, and reversing gate valves, so as to achieve simple and convenient disassembly and assembly operations and improve the use of The effect of improving the life and usability

Active Publication Date: 2020-04-17
GUOWEI VALVE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are still some deficiencies in the existing soft-sealed gate valves. First, the valve plate and the valve cavity often slide and rub against each other, which increases the wear of the valve plate and causes a gap between the valve plate and the valve cavity, which affects the soft seal. The tightness of the gate valve; secondly, most of the gate valves are assembled structures, the assembly process is complicated, and it is not convenient for the disassembly and maintenance management of the valve plate; finally, most of the soft-sealed gate valves realize the switch of the gate valve through the rotation of the bonnet, and the valve stem is used for a long time , there is a slight looseness, which will cause the gate valve to reverse, which will make the valve plate move, affect the sealing inside the gate valve, and reduce the service life of the gate valve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see Figure 1-3 , a soft-sealed gate valve, including a valve casing 1, the inner cavity of the valve casing 1 is a T-shaped structure, and a valve plate 4 is arranged inside the valve casing 1. In the closed state, the valve plate 4 is located at the intersection of the horizontal end and the vertical end of the valve casing 1. , and the movement direction of the valve plate 4 is the vertical direction of the valve housing 1, the top of the valve plate 4 is connected with a sealing plug 9, and the outer wall of the sealing plug 9 is sequentially embedded with a third rubber pad 11 and a second rubber pad 11 from bottom to top. Pad 10, the inner side of the valve housing 1 is provided with a sealing ring 7, the inner diameter of the sealing ring 7 is equal to the outer diameter of the lower end surface of the sealing plug 9, the outer wall of the sealing ring 7 is provided with a first rubber pad 8, the vertical section of the sealing plug 9 The cross-section is an inve...

Embodiment 2

[0030] see Figure 1-3 , the top of the sealing plug 9 is equipped with a valve stem 12, and the valve stem 12 is connected with the inner side of the valve housing 1 by threading, and has a self-locking function according to the thread, which ensures the stability of the valve stem 12 being screwed up and down, and the valve plate 4 The outer diameter is smaller than the inner diameter of the valve casing 1 at the thread, so that the valve plate 4 can slide out of the valve casing 1 along the vertical end of the valve casing 1, realizing quick disassembly of the soft-sealed gate valve.

[0031] The difference from Example 1 and Example 2 is that

Embodiment 3

[0033] see figure 1 and image 3 , the top of the valve stem 12 is equipped with a rotary cap 2, the side end surface of the rotary cap 2 is connected to the rotary rod 3 through the pin shaft rotation, the pin shaft is between the interference fit and the transition fit, and the rotary rod 3 is connected with the upper insert 13 and the lower insertion rod 14, the outer wall of the valve casing 1 is provided with an upper slot 15 and a lower slot 16.

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Abstract

The invention discloses a soft sealing gate valve. The soft sealing gate valve comprises a valve shell, wherein a valve plate is arranged inside the valve shell, a sealing plug is connected to the topof the valve plate, and third rubber pads and second rubber pads are sequentially arranged on the outer wall of the sealing plug from bottom to top in an embedded mode; and sealing rings are arrangedon the inner side of the valve shell, and first rubber pads are arranged on the outer walls of the sealing rings in a wrapping mode. According to the soft sealing gate valve, the sealing plug is arranged on the top of the valve plate, a valve rod is arranged on the top of the sealing plug, and during downward movement of the valve plate, the sealing rings abut against the third rubber pads on theouter wall of the sealing plug and are clamped in grooves of the third rubber pads; and when the third rubber pads are damaged, the valve plate can continue to slide down, and the sealing rings abutagainst the second rubber pads and are clamped in grooves of the second rubber pads, so that the sealing stability of the soft sealing gate valve is achieved, and the service life of the soft sealinggate valve is prolonged..

Description

technical field [0001] The invention relates to the technical field of soft-sealed gate valves, in particular to soft-sealed gate valves. Background technique [0002] Soft-sealed gate valve, industrial valve, the opening and closing part of the soft-sealed gate valve is a gate, the direction of movement of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled. [0003] However, there are still some deficiencies in the existing soft-sealed gate valves. First, the valve plate and the valve cavity often slide and rub against each other, which increases the wear of the valve plate and causes a gap between the valve plate and the valve cavity, which affects the soft seal. The tightness of the gate valve; secondly, most of the gate valves are assembled structures, the assembly process is complicated, and it is not convenient for the disassembly and maintenance management of the valve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/02F16K3/30F16K25/00F16K31/50F16K27/04
CPCF16K3/0227F16K3/0272F16K25/00F16K31/50F16K27/044
Inventor 洪振鹏牟全文李晓龙
Owner GUOWEI VALVE MFG CO LTD
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