High-stability parallel double-gate-plate gate valve

A high-stability, double-gate technology, used in sliding valves, valve devices, engine components, etc., can solve problems such as affecting the performance and service life of valves, large vibration amplitude of sealing discs, and reducing valve service life, etc., to achieve eddy current The effect of reducing shock and vibration, improving sealing performance, and prolonging service life

Inactive Publication Date: 2019-03-22
TINGYU GRP ZHEJIANG FLUID CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The parallel double gate valves on the market now, 1. Because the wedge-shaped block of the valve core is inside and outside, the outer diameter of the contact with the back of the sealing disc is too large, and the parallelism requirement is too high to affect the sealing performance. 2. The structure is too loose and the block is swollen. There is no supporting point on the back. During the opening process, the eddy current is generated when the medium passes through the valve, which causes the sealing plate to be impacted by the medium and vibrates too much, causing the sealing surface of the sealing plate to collide with the sealing surface of the valve seat, resulting in damage to the sealing surface and reducing the valve’s performance. service life
[0003] In the face of the many unstable factors mentioned above, which affect the performance and service life of the valve, according to the urgent needs of users, we have newly developed and designed a high-stability parallel double gate valve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: A kind of high-stability parallel double disc gate valve, such as figure 1 , figure 2 and image 3 As shown, it includes a bonnet 1 and a valve body 2, the bonnet 1 is fixedly connected to the top of the valve body 2, the valve body 2 is provided with a valve core structure, the valve core structure includes a valve stem 3, the One end of the valve stem 3 is threadedly connected with a wedge block 5 through a threaded gland 4, and a split ring 6 is arranged between the wedge block 5 and the threaded gland 4. The wedge block 5 includes a tapered surface 7 inside the wedge block 5, The wedge block 5 is provided with an expanding block 8 inside the wedge block 5 and attached to the conical surface 7, and the side of the expanding block 8 is attached to the conical surface. The expansion block 8 is connected with a sealing disc 9, the bottom of the wedge block 5 is pierced with a limit shaft 10 connected with the wedge block 5, the bottom of the valve body ...

Embodiment 2

[0042] The difference with embodiment 1 is:

[0043] The sides of the two sealing discs facing away from each other are coated with a wear-resistant composite layer. According to parts by weight, the wear-resistant composite layer includes 20 parts of silicon oxide ceramics, 20 parts of silicon carbide, 20 parts of quartz, and 55 parts of vanadium iron powder , 63 parts of ferrochromium powder, 55 parts of ferromolybdenum powder, 75 parts of ferrosilicon powder, 75 parts of ferromanganese powder, 7 parts of high elastic iron powder, 6 parts of vanadium powder, and medium carbon steel as the base material of the matrix. The thickness of the grinding compound layer is set to 4mm.

[0044]The silicon oxide ceramics, silicon carbide, quartz, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, high elastic iron powder and vanadium powder are all screened to 200-300 mesh.

[0045] The wear-resistant composite layer uses 30 p...

Embodiment 3

[0052] The difference with embodiment 1 is:

[0053] The sides of the two sealing discs facing away from each other are coated with a wear-resistant composite layer. According to parts by weight, the wear-resistant composite layer includes 30 parts of silicon oxide ceramics, 30 parts of silicon carbide, 30 parts of quartz, and 60 parts of vanadium iron powder , 65 parts of ferrochromium powder, 60 parts of ferromolybdenum powder, 80 parts of ferrosilicon powder, 80 parts of ferromanganese powder, 10 parts of high-elastic iron powder, 10 parts of vanadium powder, and medium carbon steel as the base material of the matrix. The thickness of the grinding compound layer is set to 4mm.

[0054] The silicon oxide ceramics, silicon carbide, quartz, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, high elastic iron powder and vanadium powder are all screened to 200-300 mesh.

[0055] The wear-resistant composite layer uses 4...

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Abstract

The invention relates to a high-stability parallel double-gate-plate gate valve. The high-stability parallel double-gate-plate gate valve comprises a valve deck, a valve body and a valve element structure; the valve element structure comprises a valve rod, a wedge-shaped block, a thread pressing sleeve and an opposite opening ring; the wedge-shaped block comprises a conical face located in the wedge-shaped block; expanding blocks are arranged in the wedge-shaped block, and are connected with sealing disks; the wedge-shaped block is provided with a limiting shaft in a penetrating manner; and the bottom of the valve body is fixedly connected with a cushion block. The cushion block can limit the positions of the two sealing disks when being closed in place, and then the reliability and stability of sealing are improved. The high-stability parallel double-gate-plate gate valve has the beneficial effects of being high in stability, capable of saving force during pushing and long in servicelife.

Description

technical field [0001] The invention relates to the technical field of gate valves, in particular to a high-stability parallel double-disc gate valve. Background technique [0002] The parallel double gate valves on the market now, 1. Because the wedge-shaped block of the valve core is inside and outside, the outer diameter of the contact with the back of the sealing disc is too large, and the parallelism requirement is too high to affect the sealing performance. 2. The structure is too loose and the block is swollen. There is no supporting point on the back. During the opening process, the eddy current is generated when the medium passes through the valve, which causes the sealing plate to be impacted by the medium and vibrates too much, causing the sealing surface of the sealing plate to collide with the sealing surface of the valve seat, resulting in damage to the sealing surface and reducing the valve’s performance. service life. [0003] Faced with the many unstable fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/02F16K3/314B22D19/08
CPCF16K3/02B22D19/085F16K3/314
Inventor 潘叶雷徐胜发
Owner TINGYU GRP ZHEJIANG FLUID CONTROL EQUIP
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