CN215981087U

CN215981087U - Novel vacuum valve

Info

Publication number: CN215981087U
Application number: CN202122359709.9U
Authority: CN
Inventors: 李玉祥; 高连彪; 邵岩风; 姚世明
Original assignee: Dongguan Dong Jin Machinery Co ltd
Current assignee: Dongguan Dong Jin Machinery Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-03-08
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses a novel vacuum valve, which comprises a valve body, wherein a sealing seat is arranged in the valve body to divide the valve body into a cylinder chamber and a buffer chamber, two sides of the valve body are respectively communicated with the buffer chamber and are provided with a first fluid channel and a second fluid channel in parallel, and the central line of the first fluid channel and the central line of the second fluid channel are not in the same straight line; the sealing seat is provided with a valve core in a penetrating way, a piston fixedly connected with the valve core is arranged in the cylinder chamber, a first leakage-proof structure is arranged between the outer side surface of the piston and the inner wall surface of the cylinder chamber, the valve core is provided with a second leakage-proof structure, and a third leakage-proof structure and a fourth leakage-proof structure are arranged on the inner wall surface and the outer side surface of the sealing seat respectively corresponding to the valve core and the valve body. The valve body is independently divided and provided with the buffer chamber, so that the internal fluid pressure of the valve body is reduced, the extrusion of fluid to the valve core is reduced, and the first leakage-proof structure, the second leakage-proof structure, the third leakage-proof structure and the fourth leakage-proof structure are combined to prevent the fluid from leaking in the valve body and prolong the service life of the valve body.

Description

Novel vacuum valve

Technical Field

The utility model relates to the field of control of pipeline conveying systems, in particular to a novel vacuum valve.

Background

The valve has different requirements according to the type and the application, and mainly has the performances of sealing, strength, regulation, circulation, opening and closing and the like. In addition to the basic parameters and properties, the properties of the fluid, including the phase (gas, liquid), corrosivity, viscosity, toxicity, flammability, explosiveness, precious and rare degree, radioactivity, etc., are also considered when designing and selecting the valve. The vacuum valve is a device for controlling the flow rate, pressure and flow direction of fluid, and is a control component in a pipeline conveying system, the fluid to be controlled can be liquid, gas or a gas-liquid mixture, and the market demand for the valve is increasing.

However, although the existing commonly used vacuum valve has the advantages of improved pneumatic valve sealing performance, simplified structure space and reduced production cost, the existing vacuum valve still has the problems of poor sealing performance, leakage risk, inconvenient maintenance and the like caused by complex structure, easy falling and damage of a sealing element, so that the product quality is reduced. Furthermore, in order to solve the problems of poor sealing performance, complex structure, inconvenient maintenance and the like caused by easy falling and damage of the sealing element, high-quality, high-efficiency and high-automation production is realized, so that the traditional vacuum valve is improved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical problem, the utility model discloses a novel vacuum valve.

The technical scheme adopted by the utility model for realizing the purpose is as follows:

a novel vacuum valve comprises a valve body and a control cylinder connected with the valve body, wherein a sealing seat is arranged inside the valve body to divide the valve body into a cylinder chamber and a buffer chamber, two sides of the valve body are respectively communicated with the buffer chamber and are provided with a first fluid channel and a second fluid channel in parallel, and the central line of the first fluid channel and the central line of the second fluid channel are not in the same straight line;

a valve core used for blocking the communication between the buffer chamber and the second fluid channel is arranged through the sealing seat, a piston fixedly connected with the valve core is arranged in the cylinder chamber, a first leakage-proof structure is arranged between the outer side surface of the piston and the inner wall surface of the cylinder chamber, the valve core is provided with a second leakage-proof structure used for sealing a gap between the valve core and the buffer chamber, and a third leakage-proof structure and a fourth leakage-proof structure are arranged on the inner wall surface and the outer side surface of the sealing seat respectively corresponding to the valve core and the valve body.

In the novel vacuum valve, the outer side surface of the piston is annularly provided with a first sealing ring fixing seat, and a first sealing ring which is arranged in the first sealing ring fixing seat in an interference manner with the cylinder chamber is arranged in the first sealing ring fixing seat.

Foretell novel vacuum valve, wherein the case includes integrated into one piece's case body and push rod, the case body set up in the surge chamber, the push rod run through set up in the seal receptacle, in correspond on the case body center on the surge chamber with second fluid channel's intercommunicating pore is provided with second sealing washer fixing base, be provided with in the second sealing washer fixing base with the second sealing washer of surge chamber interference setting.

In the novel vacuum valve, the sealing seat is provided with a gasket fixing seat around the push rod, and a teflon gasket abutted against the valve core body is arranged in the gasket fixing seat.

In the novel vacuum valve, the inner wall surface of the sealing seat surrounds the push rod and is at least provided with two groups of third sealing ring fixing seats, and third sealing rings arranged in the third sealing ring fixing seats in interference with the push rod are arranged in the third sealing ring fixing seats.

The novel vacuum valve is characterized in that at least two groups of fourth sealing ring fixing seats are arranged on the outer side surface of the sealing seat in a surrounding mode, and fourth sealing rings arranged in an interference mode with the buffer chamber and/or the air cylinder chamber are arranged in the fourth sealing ring fixing seats.

The novel vacuum valve is characterized in that a sealing fixing table is arranged in the valve body in a surrounding mode around the cylinder chamber, a sealing seat corresponds to the sealing fixing table, a sealing clamping concave table is arranged on the sealing seat in a matched mode, and a fourth sealing ring fixing seat is arranged on the outer side face of the sealing seat and/or the outer side face of the sealing clamping concave table in a surrounding mode.

The novel vacuum valve is characterized in that the contact surfaces of the sealing seat and the piston are parallel to each other.

In the novel vacuum valve, the first fluid channel and the second fluid channel are respectively provided with the inlet and the outlet, and the first fluid channel and the second fluid channel are respectively communicated with the valve body.

The utility model has the beneficial effects that: the valve core is driven to move up and down by controlling the piston, so that the communication or blocking control of the buffer chamber and the second fluid channel is realized, namely the opening or closing operation of the vacuum valve is realized, and the control of the fluid flow is further realized; the buffer chamber is independently divided and arranged, so that the internal fluid pressure of the valve body is effectively reduced, the extrusion of fluid on the valve core is reduced, and the first leakage-proof structure, the second leakage-proof structure, the third leakage-proof structure and the fourth leakage-proof structure are combined and arranged, so that the fluid is effectively prevented from leaking in the valve body, the service life of a product is prolonged, and the leakage risk is reduced; in addition, the vacuum valve is simple in structure, and the convenience in maintenance and repair is greatly improved.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention.

Detailed Description

The present invention is further illustrated by the following specific examples, which are intended to make the technical solutions of the present invention easier to understand and master, and are not intended to limit the present invention.

Example (b): referring to fig. 1 to 2, the novel vacuum valve provided by this embodiment includes a valve body 1 and a control cylinder connected to the valve body 1, a seal seat 4 is disposed inside the valve body 1 to divide the valve body into a cylinder chamber and a buffer chamber, a first fluid passage 51 and a second fluid passage 52 are disposed on two sides of the valve body 1 and respectively communicated with the buffer chamber in parallel, and a center line of the first fluid passage 51 and a center line of the second fluid passage 52 are not on the same straight line;

a valve core 3 for blocking the communication between the buffer chamber and the second fluid channel 52 is arranged through the seal seat 4, a piston 2 fixedly connected with the valve core 3 is arranged in the cylinder chamber, a first leakage-proof structure is arranged between the outer side surface of the piston 2 and the inner wall surface of the cylinder chamber, the valve core 3 is provided with a second leakage-proof structure for sealing the gap between the valve core 3 and the buffer chamber, and a third leakage-proof structure and a fourth leakage-proof structure are arranged on the inner wall surface and the outer side surface of the seal seat 4 respectively corresponding to the valve core 3 and the valve body 1.

Specifically, the piston 2 is controlled to drive the valve core 3 to move up and down so as to realize communication or blocking control of the buffer chamber and the second fluid channel 52, namely opening or closing operation of the vacuum valve, and further realize control of fluid flow; the buffer chamber is independently divided and arranged, so that the internal fluid pressure of the valve body 1 is effectively reduced, the extrusion of fluid on the valve core 3 is reduced, and the first leakage-proof structure, the second leakage-proof structure, the third leakage-proof structure and the fourth leakage-proof structure are combined and arranged, so that the leakage of the fluid in the valve body 1 is effectively avoided, the service life of a product is prolonged, and the leakage risk is reduced; in addition, the vacuum valve is simple in structure, and the convenience in maintenance and repair is greatly improved.

Preferably, a first sealing ring fixing seat is annularly arranged on the outer side surface of the piston 2, and a first sealing ring 21 which is arranged in an interference manner with the cylinder chamber is arranged in the first sealing ring fixing seat; preferably, the piston 2 is in clearance fit with the cylinder chamber, and the first sealing ring 21 can be a combined C-shaped sealing ring, so as to improve the sealing performance between the piston 2 and the cylinder chamber and avoid leakage risk.

Preferably, the valve element 3 includes an integrally formed valve element body and a push rod, the valve element body is disposed in the buffer chamber, the push rod is disposed in the seal seat 4 in a penetrating manner, a second seal ring fixing seat is disposed on the valve element body and correspondingly surrounds the buffer chamber and the communication hole of the second fluid channel 52, a second seal ring 31 disposed in an interference manner with the buffer chamber is disposed in the second seal ring fixing seat, and the second seal ring 31 may be a T-shaped seal ring, so as to improve the sealing performance between the valve element body and the buffer chamber and avoid leakage risk.

Furthermore, a gasket fixing seat is arranged on the sealing seat 4 around the push rod, and a teflon gasket 41 abutting against the valve core body is arranged in the gasket fixing seat.

Preferably, at least two groups of third sealing ring fixing seats are arranged on the inner wall surface of the sealing seat 4 around the push rod, and a third sealing ring 42 which is arranged in an interference manner with the push rod is arranged in each third sealing ring fixing seat; preferably, the push rod is in clearance fit with the seal holder 4, and the third seal ring 42 can be a PDR type seal ring, so as to improve the seal property between the seal holder 4 and the push rod, and avoid leakage risk.

Preferably, at least two groups of fourth sealing ring fixing seats are arranged around the outer side surface of the sealing seat 4, and fourth sealing rings 43 which are arranged in an interference manner with the buffer chamber and/or the cylinder chamber are arranged in the fourth sealing ring fixing seats; the fourth sealing ring 43 may be an O-ring to improve the sealing performance between the sealing seat 4 and the buffer chamber and/or the cylinder chamber, thereby avoiding leakage risk.

Furthermore, a sealing fixing table is annularly arranged in the valve body 1 around the cylinder chamber, a sealing clamping concave table is adaptively arranged on the sealing seat 4 corresponding to the sealing fixing table, and the fourth sealing ring fixing seat is annularly arranged on the outer side surface of the sealing seat 4 and/or the sealing clamping concave table; preferably, the sealing seat 4 is in clearance fit with the cylinder chamber, and the sealing fixing table and the sealing clamping concave table are locked and arranged, so that the structural reliability of the vacuum valve is improved.

Further, the contact surfaces of the sealing seat 4 and the piston 2 are parallel to each other, and the contact surfaces of the sealing seat 4 and the piston 2 are parallel to each other, so that the sealing performance inside the valve body 1 is further improved, and the leakage risk is reduced.

Further, a flow inlet and a flow outlet are respectively arranged through the valve body 1 and communicated with the first fluid channel 51 and the second fluid channel 52, and O-rings are respectively arranged around the flow inlet and the flow outlet.

The working principle is as follows: when the novel vacuum valve does not work, the piston 2 drives the valve core 3 to be attached to the sealing chamber, namely the vacuum valve is closed, and fluid cannot pass through the vacuum valve;

when the novel vacuum valve starts to work, the piston 2 drives the valve core 3 to be attached to the sealing seat 4, namely, the vacuum valve is opened, and fluid can pass through the vacuum valve.

The valve core is driven to move up and down by controlling the piston, so that the communication or blocking control of the buffer chamber and the second fluid channel is realized, namely the opening or closing operation of the vacuum valve is realized, and the control of the fluid flow is further realized; the buffer chamber is independently divided and arranged, so that the internal fluid pressure of the valve body is effectively reduced, the extrusion of fluid on the valve core is reduced, and the first leakage-proof structure, the second leakage-proof structure, the third leakage-proof structure and the fourth leakage-proof structure are combined and arranged, so that the fluid is effectively prevented from leaking in the valve body, the service life of a product is prolonged, and the leakage risk is reduced; in addition, the vacuum valve is simple in structure, and the convenience in maintenance and repair is greatly improved.

The foregoing is merely a preferred embodiment of the utility model and is not intended to limit the utility model in any manner. Those skilled in the art can make many possible variations and modifications to the utility model using the above disclosed technical means and teachings, or can modify equivalent embodiments with equivalent variations, without departing from the scope of the utility model. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention should be covered by the protection scope of the present invention without departing from the contents of the technical scheme of the present invention.

Claims

1. A novel vacuum valve is characterized by comprising a valve body and a control cylinder connected with the valve body, wherein a sealing seat is arranged in the valve body to divide the valve body into a cylinder chamber and a buffer chamber, two sides of the valve body are respectively communicated with the buffer chamber and are provided with a first fluid channel and a second fluid channel in parallel, and the central line of the first fluid channel and the central line of the second fluid channel are not in the same straight line;

2. The novel vacuum valve as claimed in claim 1, wherein a first sealing ring fixing seat is annularly arranged on the outer side surface of the piston, and a first sealing ring which is arranged in an interference manner with the cylinder chamber is arranged in the first sealing ring fixing seat.

3. The vacuum valve as claimed in claim 2, wherein the valve element includes a valve element body and a push rod, the valve element body is disposed in the buffer chamber, the push rod is disposed in the seal seat, a second seal ring fixing seat is disposed on the valve element body corresponding to a communication hole surrounding the buffer chamber and the second fluid channel, and a second seal ring disposed in interference with the buffer chamber is disposed in the second seal ring fixing seat.

4. The novel vacuum valve as claimed in claim 3, wherein a gasket fixing seat is disposed on the sealing seat around the push rod, and a Teflon gasket is disposed in the gasket fixing seat and abuts against the valve core body.

5. The novel vacuum valve as claimed in claim 4, wherein the inner wall surface of the sealing seat is provided with at least two groups of third sealing ring fixing seats around the push rod, and a third sealing ring which is arranged in the third sealing ring fixing seats in an interference manner with the push rod is arranged in the third sealing ring fixing seats.

6. The novel vacuum valve as claimed in claim 5, wherein at least two sets of fourth sealing ring fixing seats are arranged around the outer side surface of the sealing seat, and fourth sealing rings arranged in the fourth sealing ring fixing seats in interference with the buffer chamber and/or the cylinder chamber are arranged in the fourth sealing ring fixing seats.

7. The novel vacuum valve as claimed in claim 6, wherein the valve body is provided with a sealing fixing platform around the cylinder chamber, the sealing seat is provided with a sealing and clamping concave platform corresponding to the sealing and fixing platform, and the fourth sealing ring fixing seat is annularly arranged on the outer side surface of the sealing seat and/or the sealing and clamping concave platform.

8. The novel vacuum valve as claimed in claim 7, wherein the contact surfaces of the sealing seat and the piston are parallel to each other.

9. The novel vacuum valve as claimed in claim 8, wherein a flow inlet and a flow outlet are provided through the valve body and connected to the first fluid passage and the second fluid passage, respectively.