CN214699217U

CN214699217U - Straight-through plane sealing stop valve with pressure relief function

Info

Publication number: CN214699217U
Application number: CN202120277924.1U
Authority: CN
Inventors: 胡艳亮; 吴燕; 荣新起; 杨杰; 杨威; 李吉庆; 刘杨; 郑学鹏
Original assignee: Xinjiang Xitai Petroleum Equipment Co ltd
Current assignee: Xinjiang Xitai Petroleum Equipment Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-11-12
Anticipated expiration: 2031-02-01

Abstract

The utility model relates to the technical field of valves, a take direct type plane seal stop valve of pressure release function, reset piece and case including direct type stop valve body, pretension screw rod, elasticity. The utility model has the advantages of reasonable and compact structure, when the through stop valve body closes completely, after entrance point fluidic pressure increases to the certain degree, make case promotion elasticity reset, make inlet channel and decompression chamber intercommunication, make the entrance point and the exit end intercommunication of through stop valve body then, make the fluid pressure release of entrance point, after pressure reduction, elasticity resets and promotes the case and remove downwards and seal the inlet channel, the entrance point and the exit end of making the through stop valve body cut off, can avoid the through stop valve body under the condition of closing, the anterior pipeline of through stop valve body or the impaired phenomenon of device superpressure when the medium pressure of import rises, and the safety is realized, and is labor-saving, and is simple and convenient, high efficiency characteristics.

Description

Straight-through plane sealing stop valve with pressure relief function

Technical Field

The utility model relates to the technical field of valves, a take direct plane seal stop valve of pressure release function.

Background

The straight-through plane sealing stop valve with the pressure relief function is mainly applied to the fields of industry, agriculture, heating and heat supply, oil extraction and chemical industry, is matched with a manual, pneumatic or electric actuating mechanism, has the function of switching on and off a pipeline, and can ensure that the front end of the regulating valve is not overpressured. The existing stop valve does not have a pressure relief function generally, and when the stop valve is closed, the pressure of a medium at an inlet is increased, so that a pipeline or a device at the front part of the regulating valve is over-pressurized, and even damaged.

Disclosure of Invention

The utility model provides a take direct type plane seal stop valve of pressure release function has overcome above-mentioned prior art not enough, and it can effectively solve current direct type stop valve under the condition of closing, the anterior pipeline of direct type stop valve or the problem of device superpressure damage even that exist when the medium pressure of import rises.

The technical scheme of the utility model is realized through following measure: a straight-through type plane sealing stop valve with a pressure relief function comprises a straight-through type stop valve body, a pre-tightening screw, an elastic reset piece and a valve core, wherein a horizontal sealing surface of a valve body of the straight-through type stop valve body and a horizontal sealing surface of a valve clack of the straight-through type stop valve body form a plane sealing pair of the straight-through type stop valve body, a pressure relief cavity is arranged in the valve clack of the straight-through type stop valve body, a plurality of liquid outlet channels which are communicated with an outlet end of the straight-through type stop valve body are uniformly distributed on the side wall of the pressure relief cavity at intervals along the circumferential direction, a liquid inlet channel communicated with an inlet end of the straight-through type stop valve body is arranged on the inner wall of the lower end of the pressure relief cavity, the liquid inlet channel is vertically arranged, the upper end of the valve core is hermetically installed at the upper end of a valve rod of the straight-through type stop valve body, an installation hole with the upper end of the pressure relief cavity is arranged in the installation hole, and the pre-tightening screw is hermetically and fixedly installed at the upper end above the straight-through type stop valve body, an elastic reset piece is arranged between the lower end of the pre-tightening screw and the upper side of the valve core.

The following are further optimization or/and improvement of the technical scheme of the utility model:

the inner wall of the lower end of the pressure relief cavity can be a sealing surface, and the lower side of the valve core is in sealing contact with the sealing surface.

The mounting hole can comprise a threaded section, a sealing section, a first limiting section and a second limiting section which are sequentially communicated from top to bottom and have the inner diameter which is sequentially increased from top to bottom, the outer side of the upper portion of the pre-tightening screw rod is in threaded connection with the threaded section, the outer side of the middle portion of the pre-tightening screw rod is in sealing contact with the inner wall of the sealing section, the outer side of the lower portion of the pre-tightening screw rod is in sealing contact with the inner wall of the first limiting section, a gasket sleeved in the second limiting section is installed at the lower end of the pre-tightening screw rod, and the lower end of the gasket is installed together with the upper end of the elastic reset piece.

The elastic reset piece can be a compression spring, a lower boss sleeved on the inner side of the lower portion of the compression spring is fixed in the center of the upper end of the valve core, the inner side of the upper portion of the compression spring is sleeved on the outer side of the lower end of the pre-tightening screw, the upper end of the compression spring is abutted against the lower end of the washer, a locknut is screwed on the outer side of the upper end of the pre-tightening screw corresponding to the upper end of the valve rod of the straight-through stop valve body, and the upper end of the pre-tightening screw is of a square or hexagonal structure.

And a plurality of sealing rings are arranged between the outer side of the middle part of the pre-tightening screw rod and the inner wall of the sealing section and between the outer side of the lower part of the pre-tightening screw rod and the inner wall of the first limiting section at intervals up and down.

Wear-resisting rings can be arranged on the sealing surface, the lower side of the valve core, the horizontal sealing surface of the valve clack of the straight-through stop valve body and the horizontal sealing surface of the valve body of the straight-through stop valve body.

The center of the lower end of the valve cover of the straight-through stop valve body can be provided with a mounting groove, and a fixing sleeve coaxially sleeved on the outer side of the valve rod of the straight-through stop valve body is tightly sleeved in the mounting groove.

The utility model has the advantages of reasonable and compact structure, when the through stop valve body closes completely, after entrance point fluidic pressure increases to the certain degree, make case promotion elasticity reset, make inlet channel and decompression chamber intercommunication, make the entrance point and the exit end intercommunication of through stop valve body then, make the fluid pressure release of entrance point, after pressure reduction, elasticity resets and promotes the case and remove downwards and seal the inlet channel, the entrance point and the exit end of making the through stop valve body cut off, can avoid the through stop valve body under the condition of closing, the anterior pipeline of through stop valve body or the impaired phenomenon of device superpressure when the medium pressure of import rises, and the safety is realized, and is labor-saving, and is simple and convenient, high efficiency characteristics.

Drawings

Fig. 1 is a schematic sectional view of the preferred embodiment of the present invention.

The codes in the figures are respectively: the stop valve comprises a straight-through stop valve body 1, a pre-tightening screw rod 2, a compression spring 3, a valve core 4, a lower boss 5, a gasket 6, a valve body 7, a locknut 8, a valve cover 9, a valve rod 10, a valve clack 11, a fixing sleeve 12, a sealing gasket 13, a sealing ring 14, a filler 15, a pressure relief cavity 16, a liquid inlet channel 17, a liquid outlet channel 18, a first limiting section 19, a second limiting section 20, an inlet end 21 and an outlet end 22.

Detailed Description

The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.

In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention will be further described with reference to the following examples and drawings:

as shown in attached figure 1, the straight-through type plane sealing stop valve with the pressure relief function comprises a straight-through type stop valve body 1, and comprises a pre-tightening screw rod 2, an elastic reset piece and a valve core 4, wherein a horizontal sealing surface of a valve body 7 of the straight-through type stop valve body 1 and a horizontal sealing surface of a valve clack 11 of the straight-through type stop valve body 1 form a plane sealing pair of the straight-through type stop valve body 1, a pressure relief cavity 16 is arranged in the valve clack 11 of the straight-through type stop valve body 1, a plurality of liquid outlet channels 18 which are communicated with an outlet end 22 of the straight-through type stop valve body 1 are circumferentially and uniformly distributed at intervals on the side wall of the pressure relief cavity 16, a liquid inlet channel 17 communicated with an inlet end 21 of the straight-through type stop valve body 1 is arranged on the inner wall of the lower end of the pressure relief cavity 16, the liquid inlet channel 17 is vertically arranged, the valve core 4 is hermetically arranged at the upper end, a mounting hole communicated with the upper end of the pressure relief cavity 16 is arranged in the center of a valve rod 10 of the straight-through type stop valve body 1, the mounting hole is internally and fixedly provided with a pre-tightening screw rod 2 with the upper end positioned above the straight-through stop valve body 1 in a sealing way, and an elastic reset piece is arranged between the lower end of the pre-tightening screw rod 2 and the upper side of the valve core 4.

According to requirements, the straight-through stop valve body 1 is a known straight-through stop valve, the valve body 7, the valve cover 9, the valve rod 10, the valve clack 11, the packing gland and the pre-tightening screw rod 2 of the straight-through stop valve body 1 can be made of carbon steel or stainless steel with corresponding temperature-resistant grade according to requirements, a graphite composite gasket can be used as a sealing gasket 13 between the valve cover 9 and the valve body 7 of the straight-through stop valve body 1, a graphite packing or an asbestos-graphite composite packing can be used as a packing 15 of the straight-through stop valve body 1, a brass nut or other nuts with lubricating materials can be used as a valve rod 10 nut of the straight-through stop valve body 1, a manual or electric actuating mechanism can be installed on the valve cover 9 of the straight-through stop valve body 1, the upper end of the valve rod 10 of the straight-through stop valve body 1 is connected with an actuating part of an actuator, and the valve is opened and closed. In the use, when through stop valve body 1 closes completely, after entrance point 21 fluidic pressure increases to a certain extent, make case 4 promote elasticity reset piece, make inlet channel 17 and pressure release chamber 16 intercommunication, make entrance point 21 and the exit end 22 intercommunication of through stop valve body 1 then, make the fluid pressure release of entrance point 21, after pressure reduction, elasticity reset piece promotes case 4 and moves down and sealed inlet channel 17, make entrance point 21 and the exit end 22 of through stop valve body 1 cut off, can avoid through stop valve body 1 under the condition of closing, the impaired phenomenon of straight through stop valve body 1 front portion pipeline or device superpressure when the medium pressure of import rises, the utility model discloses rational in infrastructure and compact, convenient to use has safety, laborsaving, simple and convenient, efficient characteristics.

The straight-through plane sealing stop valve with the pressure relief function can be further optimized or/and improved according to actual requirements:

as shown in figure 1, the inner wall of the lower end of the pressure relief cavity 16 is a sealing surface, and the lower side of the valve core 4 is in sealing contact with the sealing surface.

The sealing surface is a horizontal surface as required. In the use process, through the arrangement, the fluid at the inlet end 21 of the straight-through type stop valve body 1 can apply vertical upward pressure on the valve core 4, so that the valve core 4 moves up and down, and the arrangement of the pre-tightening screw rod 2, the elastic reset piece and the valve core 4 is also convenient.

As shown in the attached drawing 1, the mounting hole comprises a threaded section, a sealing section, a first limiting section 19 and a second limiting section 20 which are sequentially communicated from top to bottom and have inner diameters which are sequentially increased from top to bottom, the outer side of the upper part of the pre-tightening screw rod 2 is in threaded connection with the threaded section, the outer side of the middle part of the pre-tightening screw rod 2 is in sealing contact with the inner wall of the sealing section, the outer side of the lower part of the pre-tightening screw rod 2 is in sealing contact with the inner wall of the first limiting section 19, a gasket 6 sleeved in the second limiting section 20 is installed at the lower end of the pre-tightening screw rod 2, and the lower end of the gasket 6 is installed together with the upper end of the elastic reset piece.

According to requirements, the outer diameter of the gasket 6 is larger than the inner diameter of the first limiting section 19. In the use, the upper portion outside spiro union of pretension screw rod 2 is in the screw thread section, can make it reciprocate in the mounting hole through rotating pretension screw rod 2 to adjust the tight power of support between elasticity piece and the case 4 that resets, then adjust pressure release pressure, packing ring 6 reciprocates in spacing section 20 of second and can prevent that elasticity piece that resets from warping too big and inefficacy.

As shown in the attached figure 1, the elastic reset piece is a compression spring 3, a lower boss 5 sleeved on the inner side of the lower part of the compression spring 3 is fixed in the center of the upper end of a valve core 4, the inner side of the upper part of the compression spring 3 is sleeved on the outer side of the lower end of a pre-tightening screw rod 2, the upper end of the compression spring is abutted against the lower end of a gasket 6, a locknut 8 is screwed on the outer side of the upper end of the pre-tightening screw rod 2 corresponding to the upper end position of a valve rod 10 of the straight-through stop valve body 1, and the upper end of the pre-tightening screw rod 2 is of a square or hexagonal structure.

According to the demand, the elastic reset piece can be a cylindrical spring, a belleville spring or a grinding tool spring made of high-temperature-resistant stainless steel or spring steel, the lower boss 5 and the valve core 4 are integrally arranged, and the center of the upper end of the pre-tightening screw rod 2 can also be provided with an inner hexagonal groove. In the use, can play the direction restraint effect to compression spring 3 through setting up boss 5 down, prevent to take place the skew inefficacy at the pressure release in-process, packing ring 6 can increase 2 lower extremes of pretension screw and compression spring 3's area of contact, improves the reliability in the use, and locknut 8 can be adjusted well the pressure release pressure at pretension screw 2 and then plays locking effect.

As shown in fig. 1, a plurality of sealing rings 14 are vertically spaced between the outer side of the middle of the pre-tightening screw 2 and the inner wall of the sealing section and between the outer side of the lower part of the pre-tightening screw 2 and the inner wall of the first limiting section 19.

The sealing ring 14 may be any known sealing ring, such as a viton O-ring, as desired. In the use process, through the arrangement, the sealing performance between the mounting hole and the pre-tightening screw rod 2 can be enhanced, and fluid is prevented from leaking from the liquid inlet channel 17, the pressure relief cavity 16 and the mounting hole.

As shown in fig. 1, wear-resistant rings are arranged on the sealing surface, the lower side of the valve core 4, the horizontal sealing surface of the valve clack 11 of the straight-through stop valve body 1 and the horizontal sealing surface of the valve body 7 of the straight-through stop valve body 1.

The wear ring may be formed by spray welding an alloy, as desired. In the use process, through the arrangement, the service life of the valve core 4 and the straight-through type stop valve body 1 can be prolonged.

As shown in the attached figure 1, a mounting groove is arranged in the center of the lower end of a valve cover 9 of the straight-through stop valve body 1, and a fixing sleeve 12 coaxially sleeved outside a valve rod 10 of the straight-through stop valve body 1 is tightly sleeved in the mounting groove.

According to the requirement, the material of the fixed sleeve 12 can be aluminum alloy or brass or a graphite copper sleeve, so that the lubricity between the valve rod 10 of the straight-through stop valve body 1 and the fixed sleeve 12 can be improved when the valve rod moves up and down.

Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.

Claims

1. A straight-through type plane sealing stop valve with a pressure relief function comprises a straight-through type stop valve body, and is characterized by further comprising a pre-tightening screw rod, an elastic reset piece and a valve core, wherein a horizontal sealing surface of a valve body of the straight-through type stop valve body and a horizontal sealing surface of a valve clack of the straight-through type stop valve body form a plane sealing pair of the straight-through type stop valve body, a pressure relief cavity is arranged in the valve clack of the straight-through type stop valve body, a plurality of liquid outlet channels which are communicated with an outlet end of the straight-through type stop valve body are circumferentially and uniformly distributed at intervals on the side wall of the pressure relief cavity, a liquid inlet channel communicated with an inlet end of the straight-through type stop valve body is arranged on the inner wall of the lower end of the pressure relief cavity, the liquid inlet channel is vertically arranged, the valve core is hermetically installed at the upper end of the valve rod of the straight-through type stop valve body, an installation hole communicated with the upper end of the pressure relief cavity is arranged in the center of the valve rod of the straight-through type stop valve body, and fixedly installed in a sealing manner, an elastic reset piece is arranged between the lower end of the pre-tightening screw and the upper side of the valve core.

2. A straight-through plane sealing stop valve with pressure relief function as claimed in claim 1, wherein the inner wall of the lower end of the pressure relief chamber is a sealing surface, and the lower side of the valve core is in sealing contact with the sealing surface.

3. The straight-through plane sealing stop valve with the pressure relief function according to claim 1 or 2, wherein the mounting hole comprises a threaded section, a sealing section, a first limiting section and a second limiting section which are sequentially communicated from top to bottom and have inner diameters which are sequentially increased from top to bottom, the outer side of the upper part of the pre-tightening screw rod is screwed in the threaded section, the outer side of the middle part of the pre-tightening screw rod is in sealing contact with the inner wall of the sealing section, the outer side of the lower part of the pre-tightening screw rod is in sealing contact with the inner wall of the first limiting section, a gasket sleeved in the second limiting section is mounted at the lower end of the pre-tightening screw rod, and the lower end of the gasket is mounted with the upper end of the elastic reset piece.

4. A straight-through plane sealing stop valve with a pressure relief function as claimed in claim 3, characterized in that the elastic reset member is a compression spring, a lower boss sleeved on the inner side of the lower part of the compression spring is fixed at the center of the upper end of the valve core, the inner side of the upper part of the compression spring is sleeved on the outer side of the lower end of the pre-tightening screw rod, the upper end of the compression spring is abutted against the lower end of the washer, a locknut is screwed on the outer side of the upper end of the pre-tightening screw rod corresponding to the upper end position of the valve rod of the straight-through stop valve body, and the upper end of the pre-tightening screw rod is of a square or hexagonal structure.

5. A straight-through plane sealing stop valve with a pressure relief function as claimed in claim 3, wherein a plurality of sealing rings are arranged at intervals up and down between the outer side of the middle part of the pre-tightening screw rod and the inner wall of the sealing section and between the outer side of the lower part of the pre-tightening screw rod and the inner wall of the first limiting section.

6. A straight-through plane sealing stop valve with a pressure relief function as claimed in claim 4, wherein a plurality of sealing rings are arranged at intervals up and down between the outer side of the middle part of the pre-tightening screw rod and the inner wall of the sealing section and between the outer side of the lower part of the pre-tightening screw rod and the inner wall of the first limiting section.

7. A through plane sealing stop valve with pressure relief function according to claim 2, 4, 5 or 6, characterized in that wear-resistant rings are arranged on the sealing surface, the lower side of the valve core, the horizontal sealing surface of the valve clack of the through stop valve body and the horizontal sealing surface of the valve body of the through stop valve body.

8. A through type plane sealing stop valve with pressure relief function as claimed in claim 3, characterized in that wear-resistant rings are provided on the sealing surface, on the lower side of the valve core, on the horizontal sealing surface of the valve clack of the through type stop valve body and on the horizontal sealing surface of the valve body of the through type stop valve body.

9. A straight-through plane sealing stop valve with pressure relief function as claimed in claim 1, 2, 4, 5, 6 or 8, wherein the center of the lower end of the valve cover of the straight-through stop valve body is provided with a mounting groove, and a fixing sleeve coaxially sleeved on the outer side of the valve rod of the straight-through stop valve body is tightly sleeved in the mounting groove.

10. A straight-through plane sealing stop valve with pressure relief function as claimed in claim 3, wherein the center of the lower end of the valve cover of the straight-through stop valve body is provided with a mounting groove, and a fixing sleeve coaxially sleeved on the outer side of the valve rod of the straight-through stop valve body is tightly sleeved in the mounting groove.