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Novel dual-sealing type dome valve

A dome valve and double-sealing technology, which is applied to valve devices, cocks including cut-off devices, engine components, etc., can solve the problems of airbag life not reaching the renewal effect, inconvenient production and maintenance, and increased wear and tear of sealing parts, etc. problems, achieve good sealing, reliable performance and life, and increase the effect of service life

Active Publication Date: 2017-09-26
JIANGSU GEN DE POWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the airbag seal needs gas to expand to achieve the fit with the spherical surface, the inherent factors determine that the material and life of the airbag cannot reach the renewal effect of using industrial and mining (the airbag wears out, and the soft material is easy to weaken and break in a high temperature environment), Even if the airbag is made of fluorine rubber, the medium in the pipeline is particulate matter, so it is easy to wash and damage the airbag
Due to the severe industrial and mining conditions in many places in the power plant, the airbag type soft-sealed dome valves currently on the market have a short service life during use, and the airbag needs to be replaced in a short period, which is very inconvenient for production and maintenance.
[0003] The application CN201610229392.8 file submitted by the inventor described a dome valve. A clamped sealing part is arranged between the piston of the dome valve and the sealing gland. The sealing part clamped between the two is in conflict with the valve core to achieve sealing, and the sealing part is sealed with a hard gasket (such as engineering plastics), which has more reliable performance and life than traditional sealing, but this material is compared to metal The material is more prone to wear, and when the dome valve is from the closed position to the open position, the exhaust of the existing dome valve and the opening of the ball valve are synchronized, which is easy to damage the sealing surface, and the air pressure in the piston makes the sealing parts There is a conflicting pressure with the spool, which will increase the wear of the sealing parts, thereby reducing their life

Method used

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  • Novel dual-sealing type dome valve
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  • Novel dual-sealing type dome valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] like figure 1 as shown, figure 1 A schematic diagram of the main structure of a new double-sealed dome valve is shown. Dome valves are often used on pipelines and tanks for gas-solid two-phase injection or transportation to achieve cut-off or shut-off functions. The new double-sealed dome valve in this embodiment includes a valve body 100, a valve core 200 disposed inside the valve body 100, an annular valve seat 300, and a valve cover 400 disposed on the valve seat 300 , wherein, the spool 200 is fixedly connected with the rotating shaft part 500 through screws, and the rotating shaft part 500 drives the spool 200 to move through rotation so as to realize the opening or closing of the new double-sealed dome valve. In order to better realize the sealing of the new double-sealed dome valve, see figure 2 and image 3 , in this embodiment, the new double-sealed dome valve also includes a gland 600, one end of which is fixedly connected to the valve cover 400 by screws...

Embodiment 2

[0041] like Figure 5 and Image 6 shown, and see Figure 1 ~ Figure 4 , the novel double-sealed dome valve in this embodiment, which includes a valve body 100, a valve core 200 disposed inside the valve body 100, an annular valve seat 300, and a valve disposed on the valve seat 300 The cover 400, wherein the valve core 200 is fixedly connected with the rotating shaft part 500 through screws, and the rotating shaft part 500 drives the valve core 200 to move through rotation so as to realize the opening or closing of the new double-sealed dome valve. Here, in order to better realize the opening and closing of the new type double-sealed dome valve, the rotating shaft component 500 includes an upper rotating shaft 501 and a lower rotating shaft 502, and the upper rotating shaft 501 and the lower rotating shaft 502 are connected to the valve core 200 through a rotating arm plate 503 , so as to drive the movement of the spool 200 . In order to better realize the sealing of the n...

Embodiment 3

[0046] like Figure 5 and Image 6 shown, and see Figure 1 ~ Figure 4 , the novel double-sealed dome valve in this embodiment, which includes a valve body 100, a valve core 200 disposed inside the valve body 100, an annular valve seat 300, and a valve disposed on the valve seat 300 The cover 400, wherein the valve core 200 is fixedly connected with the rotating shaft part 500 through screws, and the rotating shaft part 500 drives the valve core 200 to move through rotation so as to realize the opening or closing of the new double-sealed dome valve. Here, in order to better realize the opening and closing of the new type double-sealed dome valve, the rotating shaft component 500 includes an upper rotating shaft 501 and a lower rotating shaft 502, and the upper rotating shaft 501 and the lower rotating shaft 502 are connected to the valve core 200 through a rotating arm plate 503 , so as to drive the movement of the spool 200 . In order to better realize the sealing of the n...

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PUM

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Abstract

A novel dual-sealing type dome valve comprises a valve body, a valve element, a valve seat and a valve deck and further comprises a gland, a sealing assembly and an air source channel. One end of the gland is connected with the valve deck, and the other end exceeds the inner side face of the valve deck so that a limiting face can be formed, then the other end of the gland extends downwards to abut against the outer end face of the valve element when the dome valve is closed, and a sealing channel is formed. The sealing assembly comprises a piston and a sealing gland. The piston and the sealing gland are arranged in the sealing channel and can move in the sealing channel. The air source channel extends from an opening of the valve deck to the sealing channel so that an air inlet and outlet channel can be formed. The novel dual-sealing type dome valve has the beneficial effects that sealing is achieved by adopting a metal material, thus, compared with traditional sealing, the performance is more reliable, and the service life is longer. Control is achieved through an air source, air in the piston is exhausted preferentially, the valve can be opened after the pressure between the valve element and the piston is reduced, abrasion due to opening of the valve is reduced, the service life of the valve is prolonged, the maintenance period is further shortened, and energy sources are saved.

Description

technical field [0001] The invention belongs to the technical field of valve bodies and relates to a novel double-sealed dome valve. Background technique [0002] Ordinary ball valve sealing mainly depends on the pre-tightening force or fluid pressure, the valve seat and the ball are pressed tightly and the elastic-plastic deformation of the valve seat material is achieved to achieve sealing. Because the valve body and ball are made of metal materials, and the valve seat is made of soft non-metallic materials, when this type of ball valve is used in cold and hot working environments, due to the different materials of the valve seat and the valve body, the thermal expansion and contraction are inconsistent, which is easy Cause leakage of the ball valve or valve opening and closing failure during operation. The dome valve is the most effective material conveying valve that can open and close quickly in the world. It is also the most widely used and most effective key valve in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/20
CPCF16K5/0605F16K5/0689F16K5/201F16K5/205
Inventor 俞爱华俞杰梅一开
Owner JIANGSU GEN DE POWER EQUIP CO LTD
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