CN211852920U

CN211852920U - Middle-opening safety valve

Info

Publication number: CN211852920U
Application number: CN202020277941.0U
Authority: CN
Inventors: 姚辉
Original assignee: Shanghai Afs Valve Co ltd
Current assignee: Shanghai Afs Valve Co ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-11-03
Anticipated expiration: 2030-03-09

Abstract

The utility model provides a middle-opening safety valve, which comprises a valve body, wherein an axial accommodating space is arranged in the valve body, and two ends of the axial accommodating space are respectively provided with an air outlet; the spring is arranged in the valve body and can axially extend and retract in the valve body; the valve clack assembly is arranged in the axial accommodating space; the valve clack assembly comprises a valve clack and a sealing element, wherein two ends of the valve clack are respectively provided with a groove, a through hole is formed between the two grooves, so that the bottoms of the two grooves are communicated, one groove is arranged at one end of the spring and used for accommodating the spring to form a spring seat, and the other groove is used for inserting and inserting the sealing element; the sealing member is a part with an inverted T-shaped cross section, the sealing member is inserted into the groove, the upper end of the sealing member penetrates into the groove from the through hole to be in contact with one end of the spring, and the lower end part of the sealing member is located outside the groove and can be inserted into the first air outlet. The utility model discloses can make the valve clack open the height can open between opening a little and opening entirely and open normally, and the operation is stable.

Description

Middle-opening safety valve

Technical Field

The utility model relates to an industrial valve specifically, relates to a well open formula relief valve.

Background

The safety valve of the air compressor is an automatic pressure relief protection device opened by inlet static pressure, and is a safety device arranged for preventing explosion caused by overhigh pressure under abnormal conditions in equipment and a container. Because the safety valve technology is more and more applied to various industries, the performance of the original traditional safety valve is continuously improved, and the development of new safety valve products which meet the market requirements is not easy. The existing safety valve has the problem that the requirement on the height of the opening valve clack of the safety valve between micro opening and full opening cannot be met, the requirement that the safety valve can be made into a two-stage action and a proportional action cannot be met, and the market requirement cannot be met far away.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a well formula safety valve that opens realizes that the valve clack is opened highly between opening a little and opening entirely, and opens normally, and the operation is stable.

In order to achieve the above object, the present invention provides a middle opening safety valve, including:

the valve body is internally provided with an axial accommodating space, two ends of the axial accommodating space of the valve body are respectively provided with a first air outlet and a second air outlet, the first air outlet is used for connecting an equipment pipeline, and the second air outlet is used for connecting external exhaust gas;

the spring is arranged in the axial accommodating space of the valve body and can axially extend and retract in the axial accommodating space of the valve body;

the valve clack assembly is arranged in the axial accommodating space of the valve body; the valve clack assembly comprises a valve clack and a sealing element, wherein a first groove and a second groove are respectively arranged at two ends of the valve clack, a through hole is formed between the first groove and the second groove, so that the first groove is communicated with the bottom of the second groove, the first groove is arranged at one end of the spring and used for accommodating the spring to form a spring seat, and the second groove is used for inserting the sealing element; the sealing element is a part with an inverted T-shaped cross section, the upper end of the sealing element is a vertical part, the lower end of the sealing element is a horizontal part, the sealing element is inserted into the second groove, the vertical part of the sealing element is inserted into the second groove and penetrates into the first groove from the through hole to be contacted with one end of the spring, the upper part of the horizontal part of the sealing element is inserted into the second groove, and the lower part of the horizontal part is positioned outside the second groove and can be inserted into the first air outlet to plug the first air outlet.

Preferably, an adjusting nut is further arranged in the axial accommodating space of the valve body, and the adjusting nut is arranged at one end of the spring and is located at the second air outlet and used for adjusting the setting pressure required to be set in the valve body.

Preferably, the external thread of the adjusting nut and the inner wall of the axial accommodating space of the valve body are fixed through thread glue.

Preferably, the sealing element is a polytetrafluoroethylene sealing element.

Preferably, a nut is arranged at one end, close to the second air outlet, of the valve body, the nut is connected to the outside of the valve body through an internal thread, and an external pipeline is connected with the second air outlet through the nut.

Preferably, a gasket is arranged between the nut and the valve body, so that a sealing structure is formed between the nut and the valve body.

Preferably, the first air outlet is of an annular slope structure, so that the sealing element can be inserted into the first air outlet conveniently.

Compared with the prior art, the utility model discloses at least one kind's beneficial effect as follows has:

1. in the structure of the utility model, the valve clack in the valve clack component is connected with the sealing element into a whole, the cross section of the sealing element is in an inverted T-shaped structure, and the sealing element and the first gas outlet form a splicing structure, so that the opening height of the valve clack can be between micro-opening and full-opening and the valve clack can be normally opened, and the operation is stable; the valve clack is provided with the first groove to form a spring seat which can play a role in buffering; the whole structure is simple.

2. In the above structure of the utility model, the polytetrafluoroethylene sealing element is adopted, so that the safety valve can operate normally and stably at the working temperature below-40 ℃, and can be applied to refrigeration equipment (i.e. in a refrigerant working condition) and used as an overpressure protection device of the equipment, thereby avoiding the overpressure faced by a refrigeration system at any time, and automatically closing the safety valve after pressure relief, and reducing the loss of the coolant as much as possible; the composite material also has the advantages of low temperature resistance, corrosion resistance, stable performance, sealing performance, directional recovery and the like.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of a structure of the valve flap and the sealing member according to a preferred embodiment of the present invention;

the numbers in the figures are indicated as: 1 is a valve body, 2 is a sealing element, 3 is a valve clack, 4 is a spring, 5 is an adjusting nut, 6 is a gasket, 7 is a nut, 31 is a first groove, 32 is a second groove, 33 is a through hole, 101 is a first air outlet, and 102 is a second air outlet.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Referring to fig. 1, a schematic structural diagram of an open type safety valve according to a preferred embodiment of the present invention is shown, which includes a valve body 1, a spring 4 and a valve flap 3.

An axial accommodating space is formed inside the valve body 1, a first air outlet 101 and a second air outlet 102 are respectively arranged at two ends of the axial accommodating space, wherein the first air outlet 101 is used for connecting an equipment pipeline (which can be used for connecting an air compressor pipeline), and the second air outlet 102 is used for connecting external exhaust gas. The gas in the equipment pipeline can enter the axial accommodating space of the valve body 1 from the first gas outlet 101 and finally is discharged to the outside from the second gas outlet 102.

The spring 4 is arranged in the axial accommodating space of the valve body 1, is arranged along the axial direction of the axial accommodating space, and can extend and retract along the axial direction in the axial accommodating space.

The valve flap 3 assembly is arranged on the first air outlet 101, is used for blocking the first air outlet 101, and can open or close the first air outlet 101.

The valve clack assembly is arranged in the axial accommodating space of the valve body 1. Referring to fig. 2, the valve flap assembly includes a valve flap 3 and a sealing member 2, two ends of the valve flap 3 are respectively provided with a first groove 31 and a second groove 32, a through hole 33 is formed between the first groove 31 and the second groove 32, so that the bottoms of the first groove 31 and the second groove 32 are communicated, the first groove 31 is disposed at one end of a spring 4, and is used for accommodating the spring 4 to form a spring seat, so that one end of the spring 4 is disposed in the first groove 31. The second groove 32 is used to receive a seal. The sealing element 2 is a part with an inverted T-shaped cross section, the upper end of the sealing element 2 is a vertical part, and the lower end of the sealing element 2 is a horizontal part. The sealing element 2 is inserted into the second recess 32. The vertical part of the sealing element 2 is inserted from the second groove 32 and penetrates into the first groove 31 from the through hole 33, the end part of the vertical part is contacted with one end of the spring 4, the upper part of the horizontal part of the sealing element is inserted into the second groove 32, and the lower part of the horizontal part of the sealing element is positioned outside the second groove 32 and can be inserted into the first air outlet 101. When the gas pressure in the air compressor pipeline is larger than the set pressure value, the gas pressure is larger than the spring force, the sealing element is jacked up to open the first gas outlet 101, the gas enters the axial accommodating space of the valve body 1 from the first gas outlet 101, and finally the gas is discharged to the outside of the valve body 1 from the second gas outlet 102.

In the embodiment, the axial receiving space of the valve body 1 is a cylindrical receiving space. The valve flap 3 fits tightly with the inner diameter of the axial receiving space of the valve body 1. 316 stainless steel can be adopted as the material of the valve body 1.

In other partially preferred embodiments, an adjusting nut 5 is further disposed in the axial accommodating space of the valve body 1, and the adjusting nut 5 is disposed at one end of the spring 4, located at the second air outlet 102, and is used for adjusting a setting pressure to be set in the valve body 1. The external thread of the adjusting nut 5 is fixed with the inner wall of the valve body 1 through thread glue. (fixing with thread glue after the factory inspection is qualified).

In other partially preferred embodiments, a nut 7 is arranged at one end of the valve body 1 close to the second air outlet 102, the nut 7 is connected to the outside of the valve body through an internal thread, and an external exhaust pipeline is connected with the second air outlet through the nut 7.

In other partially preferred embodiments, a gasket 6 is arranged between the nut 7 and the valve body 1, so that a sealing structure is formed between the nut 7 and the valve body 1.

In other preferred embodiments, first outlet port 101 is an annular ramp structure to facilitate insertion of a seal into first outlet port 101.

All the parts used in the present application can adopt standard parts or common technologies if not detailed, and can be purchased from the market, the specific connection mode of each part can adopt conventional means such as bolts, rivets and welding, etc. which are mature in the prior art, the machinery, parts and electrical equipment all adopt conventional models in the prior art, the circuit connection adopts conventional connection modes in the prior art, and the method is easy to realize for the technicians in the field, and no specific description is given here.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims

1. A mid-open safety valve, comprising:

2. The open-center type safety valve according to claim 1, wherein an adjusting nut is further disposed in the axial receiving space of the valve body, the adjusting nut is disposed at one end of the spring and located at the second air outlet for adjusting a set pressure to be set in the valve body.

3. The open-center safety valve according to claim 2, wherein the external thread of the adjusting nut is fixed to the inner wall of the axial receiving space of the valve body by thread glue.

4. The valve of claim 1, wherein the seal is a teflon seal.

5. The middle-open safety valve according to any one of claims 1 to 4, wherein a nut is provided at an end of the valve body adjacent to the second gas outlet, the nut is connected to the outside of the valve body through an internal thread, and an external pipe is connected to the second gas outlet through the nut.

6. The open-center safety valve according to claim 5, wherein a gasket is provided between the nut and the valve body, so that a sealing structure is formed between the nut and the valve body.

7. The mid-open safety valve defined in any one of claims 1-4, wherein the first outlet port is of annular ramp configuration to facilitate insertion of the seal member into the first outlet port.