CN106907495B

CN106907495B - Low-temperature gas recovery valve

Info

Publication number: CN106907495B
Application number: CN201710194185.8A
Authority: CN
Inventors: 刘元磊
Original assignee: Rhodalex Valve Shanghai Co Ltd
Current assignee: Rhodalex Valve Shanghai Co Ltd
Priority date: 2017-03-28
Filing date: 2017-03-28
Publication date: 2019-12-10
Anticipated expiration: 2037-03-28
Also published as: CN106907495A

Abstract

The invention discloses a low-temperature recycled gas valve which comprises a valve body and a valve core sealed at an outlet of the valve body, wherein a spring seat is arranged in the valve body in a sliding manner, the valve core is arranged on the spring seat, a gland nut is arranged in the valve body and below the spring seat, a spring is arranged between the spring seat and the gland nut, a valve seat is arranged between the valve core and the spring seat, an inner conical surface sealing structure is arranged on the valve seat, and a cambered surface sealing structure matched with the inner conical surface sealing structure is arranged at the outlet of the valve body. The invention has good sealing effect, not only avoids wasting resources, but also effectively improves the safety performance of operators, and is not easy to leak.

Description

Low-temperature gas recovery valve

Technical Field

The invention relates to the technical field of valves, in particular to a low-temperature gas recovery valve.

Background

The natural gas is divided into compressed natural gas and liquefied natural gas according to the storage form, the main components of the natural gas are methane, a small amount of ethane, propane and other components, the boiling point of the natural gas is-162 ℃, the melting point of the natural gas is-182 ℃, and the ignition point of the natural gas is 650 ℃. The natural gas has small molecular weight, low viscosity and strong permeability, is easy to leak and diffuse, and the low-temperature valve plays an extremely important role in the safe and reliable operation of the system in devices such as production, receiving, transportation, gasification and the like, wherein the gas return port is a connecting part for recovering gas.

The valve used for the low-temperature gas return port in the prior art has poor sealing effect, and cannot be effectively sealed after gas recovery is finished, so that resource loss is caused, and the personal safety of operators is seriously threatened, thereby bringing great inconvenience to users.

However, in view of the defects in the prior art, it is necessary for researchers to develop a low-temperature recycled gas valve which has a reasonable design, a simple structure and a good sealing effect, avoids resource waste, effectively improves the safety performance of operators, and is not easy to leak.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide the low-temperature recycled gas valve which is reasonable in design, simple in structure, good in sealing effect, capable of avoiding resource waste, effectively improving the safety performance of operators and not prone to leakage.

In order to solve the technical problems, the invention adopts the following technical scheme:

The valve is characterized in that a valve seat is arranged between the valve core and the spring seat, an inner conical surface sealing structure is arranged on the valve seat, and a cambered surface sealing structure matched with the inner conical surface sealing structure is arranged at the outlet of the valve body.

In a preferred embodiment of the invention, a circular arc chamfer is arranged at the vertex angle where the inner conical surface sealing structure is matched with the cambered surface sealing structure.

In a preferred embodiment of the invention, the included angle between the tangent of the intersection point of the cambered surface sealing structure and the arc chamfer and the axis of the valve body is 47-52 degrees.

In a preferred embodiment of the invention, the included angle between the tangent of the intersection point of the cambered surface sealing structure and the arc chamfer and the axis of the valve body is 48 degrees.

In a preferred embodiment of the invention, barb structures are respectively arranged on the upper end surface and the lower end surface of the spring seat and the valve core matched with the valve seat.

In a preferred embodiment of the present invention, at least one arc surface structure sliding along the inner wall of the valve body is distributed in the circumferential direction of the spring seat.

In a preferred embodiment of the present invention, snap pins are respectively disposed on both sides of the middle portion of the valve body in a radial direction, and snap sleeves are sleeved on the snap pins.

In a preferred embodiment of the present invention, a flange is welded to an outer circumferential surface of a lower portion of the valve body, and a plurality of mounting holes are opened in the flange.

In a preferred embodiment of the present invention, the valve seat is made of polychlorotrifluoroethylene material.

Compared with the prior art, the valve seat is arranged between the valve core and the spring seat, the inner conical surface sealing structure is arranged on the valve seat, and the cambered surface sealing structure matched with the inner conical surface sealing structure is arranged at the outlet of the valve body, so that the sealing performance of the valve is effectively improved by adopting the structure, the waste of resources is avoided, and the safety performance of operators is also effectively improved; and the other end face is respectively provided with a barb structure on the upper end face and the lower end face of the spring seat, the valve core and the valve seat, the barb structures are utilized to effectively improve the stability between the valve seat and the spring seat and between the valve seat and the valve core, and the sealing effect of the valve is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is an enlarged view of fig. 1 at a.

fig. 4 is an enlarged view of fig. 1 at B.

Fig. 5 is an enlarged view of fig. 1 at C.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Referring to fig. 1 to 5, there is shown a low temperature recovery gas valve including a valve body 100 and a valve cartridge 200 sealed at an outlet 110 thereof.

An outlet 110 for recovered gas is formed in the upper end of the valve body 100, an inlet 120 for recovered gas is formed in the lower end of the valve body 100, a spring seat 300 is slidably disposed in the valve body 100, the valve spool 200 is disposed on the spring seat 300, a gland nut 400 is disposed in the valve body 100 and below the spring seat 300, the gland nut 400 is disposed in the valve body 100 through a retainer ring 700, a spring 500 is disposed between the spring seat 300 and the gland nut 400, the upper end of the spring 500 is disposed on the spring seat 300, and the lower end of the spring 500 is disposed on the gland nut 400.

The valve seat 600 is arranged between the valve core 200 and the spring seat 300, the inner conical surface sealing structure 610 is arranged on the valve seat 600, the cambered surface sealing structure 130 matched with the inner conical surface sealing structure 610 is arranged on the outlet 110 of the valve body 100, and the sealing performance of the valve is effectively improved through the effective combination of the inner conical surface sealing structure 610 and the cambered surface sealing structure 130.

the arc chamfer 611 is arranged at the vertex angle where the inner conical surface sealing structure 610 is matched with the arc sealing structure 130, the included angle between the tangent of the intersection point where the arc sealing structure 130 is matched with the arc chamfer 611 and the axis of the valve body 100 is 47-52 degrees, when the included angle between the tangent of the intersection point where the arc 131 of the arc sealing structure 130 is matched with the arc chamfer 611 and the axis of the valve body 100 is 47-52 degrees, the sealing performance of the valve can be effectively improved, and in the embodiment, the included angle between the tangent of the intersection point where the arc 131 of the arc sealing structure 130 is matched with the arc chamfer 611 and the axis of the valve body 100 is 48 degrees.

The valve seat 600 is made of polychlorotrifluoroethylene, and can better solve the problem of low-temperature leakage due to the low-temperature shrinkage of the main sealing gasket made of polychlorotrifluoroethylene, by matching with the external conical surface sealing structure 130.

The valve core 200 is provided with the plane step 220, the plane step 220 and the end face 132 of the outer conical surface sealing structure 130 are in clearance fit with each other by 0.5-1mm, when the sealing part of the valve has serious failure, the two planes are in contact with each other and have a certain leakage stopping effect, and low-temperature gas is prevented from splashing to hurt operators after use.

The protruding metal step 320 of spring holder 300 is contacted with the cooperation of case 200 to keep having 0.3mm oppression volume, stop the condition that influences sealing effect by too big and valve seat 600 deformation that produces of assembly torsion, and be equipped with barb structure 320, 210 on spring holder 300, case 200 and the upper and lower terminal surface of valve seat 600 complex respectively, barb structure 320, 210 set up the effectual sealing effect that increases this valve.

There is at least one to carry out gliding arc surface structure 310 along the inner wall of valve body in the circumference distribution of spring holder 300, adopts arc surface structure 310 can reduce the area of contact with valve body 100 when guaranteeing that there is enough direction, can effectively prevent because of the case that a small amount of moisture freezes to lead to at the inner wall can not normally actuate the emergence of phenomenon, and arc surface structure 310 is 4 in this embodiment, evenly distributed is in the week of spring holder 300.

The two sides of the middle part of the valve body 100 are respectively provided with the buckling pins 810 and 820 along the radial direction, the buckling sleeves 811 and 821 are respectively sleeved on the buckling pins 810 and 820, and the buckling pins 810 and 820 and the buckling sleeves 811 and 821 are effectively combined, so that the air return gun can be conveniently installed on the valve, and the labor intensity of operators is reduced.

The flange 900 is welded on the outer peripheral surface of the lower portion of the valve body 100, the flange 900 is provided with the plurality of mounting holes 910, and the welded connection mode is adopted, so that the production cost of the valve is effectively reduced, the processing amount is reduced, the problem of internal stress can be better reduced, the mechanical property of the material is protected, and the deformation problem caused by the large internal stress is avoided.

In conclusion, the valve seat is arranged between the valve core and the spring seat, the inner conical surface sealing structure is arranged on the valve seat, and the cambered surface sealing structure matched with the inner conical surface sealing structure is arranged at the outlet of the valve body, so that the sealing performance of the valve is effectively improved by adopting the structure, the waste of resources is avoided, and the safety performance of operators is also effectively improved; and the other end face is respectively provided with a barb structure on the upper end face and the lower end face of the spring seat, the valve core and the valve seat, the barb structures are utilized to effectively improve the stability between the valve seat and the spring seat and between the valve seat and the valve core, and the sealing effect of the valve is further improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A low-temperature recovered gas valve comprises a valve body and a valve core sealed on an outlet of the valve body, wherein a spring seat is arranged in the valve body in a sliding manner, the valve core is arranged on the spring seat, a gland nut is arranged in the valve body and below the spring seat, and a spring is arranged between the spring seat and the gland nut;

Barb structures are respectively arranged on the upper end surface and the lower end surface of the spring seat, the valve core and the valve seat;

At least one arc surface structure which slides along the inner wall of the valve body is distributed in the circumferential direction of the spring seat;

The valve core is provided with a plane step, the plane step is in clearance fit with the end face of the outer conical surface sealing structure by 0.5-1mm, when the sealing part of the valve has serious failure, the two planes are in contact and have a certain leakage stopping effect, and low-temperature gas is prevented from splashing to hurt operators after use.

2. A cryogenic recycle gas valve as claimed in claim 1, wherein: and an arc chamfer is arranged at the vertex angle where the inner conical surface sealing structure is matched with the cambered surface sealing structure.

3. A cryogenic recycle gas valve as claimed in claim 2, wherein: an included angle of 47 degrees is formed between a tangent line of an intersection point of the cambered surface sealing structure matched with the arc chamfer and the axis of the valve body

-52°。

4. A cryogenic recycle gas valve as claimed in claim 3, wherein: and the included angle between the tangent of the intersection point of the cambered surface sealing structure and the arc chamfer and the axis of the valve body is 48 degrees.

5. A cryogenic recycle gas valve as claimed in claim 1, wherein: and buckling pins are respectively arranged on two sides of the middle part of the valve body along the radial direction, and buckling sleeves are sleeved on the buckling pins.

6. A cryogenic recycle gas valve as claimed in claim 1, wherein: the outer circumferential surface of the lower part of the valve body is welded with a flange, and the flange is provided with a plurality of mounting holes.

7. A cryogenic recycle gas valve as claimed in claim 1, wherein: the valve seat is made of polychlorotrifluoroethylene materials.