CN205956483U - Prevent high back pressure and vacuous guide's formula relief valve - Google Patents
Prevent high back pressure and vacuous guide's formula relief valve Download PDFInfo
- Publication number
- CN205956483U CN205956483U CN201621008779.2U CN201621008779U CN205956483U CN 205956483 U CN205956483 U CN 205956483U CN 201621008779 U CN201621008779 U CN 201621008779U CN 205956483 U CN205956483 U CN 205956483U
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- valve
- main valve
- pipeline
- main
- medium
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Abstract
The utility model discloses a prevent high back pressure and vacuous guide's formula relief valve aims at solving the phenomenon that can appear the medium refluence in current guide's relief valve use to the not enough of potential safety hazard appears. The utility model discloses an including valve body, valve gap, be equipped with the valve pocket in the valve body, be equipped with the medium import, the medium export that communicate with the valve pocket on the valve body, install the valve barrel in the valve pocket, valve barrel upper end and valve gap zonulae occludens, the intercommunication is imported with the medium to the valve barrel lower extreme, is equipped with inside convex sealing flange on the valve barrel lower extreme inner wall, and the spring is installed between main valve lamella upper end and the valve gap in the valve barrel to the sealed butt of main valve lamella lower extreme on the sealing flange upper surface, be equipped with the intercommunicating pore near the lower extreme position on the valve barrel outer wall, intercommunication entrance pressure pipe between medium import and the entrance pressure mouth constitutes the main valve air chamber between main valve lamella upper end and the valve gap in the valve barrel, the main valve air chamber with go out to be connected flowback control mechanism between the pressure mouth.
Description
Technical field
This utility model is related to a kind of relief valve, more specifically, it relates to the pilot-operated type of a kind of anti-high back pressure and vacuum
Relief valve.
Background technology
Guide's relief valve is a kind of overpressure protection apparatus, when the pressure medium of system raises, exceedes and automatically opens during setting
Open, outside discharge medium carries out release, the pressure medium in anti-locking system exceedes specified value.Guide's relief valve generally comprises master
Valve and pilot valve, the mouth that enters to press on pilot valve is connected with the medium entrance of main valve, and the air chamber above main valve clack and pilot valve go out to press mouth
Connection, under normal circumstances, entering to press mouth and press mouth to connect with going out on pilot valve, the pressure medium of system had both acted under main valve clack
Side, acts on the top of main valve clack again, because main valve clack upper plenum medium active area is more than lower dielectric active area,
Under pressure differential effect, main valve clack is closed.When in system, pressure medium is abnormal, meets or exceeds setting pressure, lead
Flap on valve is opened, and the pressure export on pilot valve is connected with row pressure mouth and outwards row pressure, and main valve clack is made in lower dielectric pressure
With under, instantaneous open, medium is discharged rapidly in a large number from the outlet of main valve, the pressure medium in system returns to normal work
After pressure, flap return on pilot valve, entering to press mouth and press mouth to connect with going out on pilot valve, main valve clack return is it is ensured that the peace of system
Entirely.But the current a lot of guide's relief valve using, the meeting when Main valve outlet pressure is more than main valve inlet pressure during use
The phenomenon that medium flows backwards occurs, thus potential safety hazard occurs.
Utility model content
This utility model overcomes during existing guide's relief valve uses and phenomenon that medium flow backwards occurs, thus going out
A kind of deficiency of existing potential safety hazard, there is provided the pilot operated safety valve of anti-high back pressure and vacuum, even if it is during using
Main valve outlet pressure is more than the phenomenon that main valve inlet pressure is also not in that medium flows backwards, it is to avoid safety because medium flows backwards
Hidden danger.
In order to solve above-mentioned technical problem, this utility model employs the following technical solutions：A kind of anti-high back pressure and vacuum
Pilot operated safety valve, including main valve, pilot valve, pilot valve is provided with into pressure mouth, goes out to press mouth, row pressure mouth, and main valve includes valve body, valve gap,
It is provided with valve pocket in valve body, valve body is provided with the medium entrance connecting with valve pocket, media outlet, valve pocket, valve pocket are installed in valve pocket
Upper end and valve gap closely connect, and valve pocket lower end is connected with medium entrance, and it is convex that valve pocket lower end inner wall is provided with inwardly projecting sealing
Edge, main valve clack lower end seals against on sealing flange upper surface, is provided with spring in valve pocket between main valve clack upper end and valve gap,
It is communicated with hole near lower end position on valve pocket outer wall；Medium entrance connects into pressure pipe with entering to press between mouth, main valve clack in valve pocket
Main valve air chamber is constituted between upper end and valve gap, main valve air chamber and go out to press and connect back to flow control mechanism between mouth, flow back controlling organization
Including piston cylinder, bypass pipe, piston cylinder two ends are connected to left joint and right connector, and left joint and right connector are connected to
Left pipeline and right pipeline, left pipeline presses mouth to connect with going out, and right pipeline is connected with media outlet, has been slidably mounted work in piston cylinder
Plug, bypass pipe one end is connected with piston cylinder, and the other end is connected with main valve air chamber.
When the pilot operated safety valve of anti-high back pressure and vacuum uses, under normal circumstances, entering to press mouth and going out pressure on pilot valve
Mouthful connection, medium is by entering pressure pipe, left pipeline enters and promotes piston to move right closing right pipeline in piston cylinder, make bypass pipe with
Left pipeline connects, and medium reaches main valve air chamber, and the pressure medium of system had both acted on the lower section of main valve clack, and acted on main valve clack again
Top, because main valve clack upper plenum medium active area is more than lower dielectric active area, make in pressure differential and spring
With under, main valve clack is closed.When in system, pressure medium is abnormal, meets or exceeds setting pressure, the valve on pilot valve
Lobe is opened, and the pressure export on pilot valve connect with row pressure mouth and outside row pressure, enters to press mouth and goes out to press mouth and isolate, main valve clack is in lower section
Under pressure medium effect, instantaneous unlatching, medium is discharged rapidly in a large number from the media outlet of main valve, the pressure medium in system is extensive
After arriving normal operating pressure again, flap return on pilot valve, entering to press mouth and press mouth to connect with going out on pilot valve, main valve clack return,
Ensure that the safety of system.When main valve media outlet pressure is more than main valve medium entrance pressure（As high back pressure or main valve medium
Import vacuum）, medium flows into piston cylinder from right pipeline and promotes piston to be moved to the left, and closes left pipeline, right pipeline and bypass pipe
Connection, medium flow field enters main valve air chamber, and gas pressure, in main valve clack upper end, promotes main valve clack to move down closing main valve, prevents out
Existing medium flows backwards phenomenon, it is to avoid potential safety hazard because medium flows backwards.
Preferably, main valve clack upper end liftable is adjusted is connected with spring protection post.When main valve is opened, main valve clack moves upwards
After momentum is excessive, spring protection post upper end is supported on valve gap, prevents spring from irreversible plasticity by excessive condensation and becomes
Shape.
Preferably, spring protection post is bolt, bolt lower end is threaded on main valve clack, and bolt outer wall connects lock
Jack panel, locking nut is connected to main valve clack upper end.With bolt as spring protection post, lift adjustment is convenient, and locking nut makes
The connection of spring protection post is more steady.When main valve clack dismounting, spring protection post can facilitate main valve clack as pulling point
Dismounting.
Preferably, left joint and right connector all include adapter sleeve, lock sleeve, adapter sleeve the inner is threaded in piston cylinder
End, adapter sleeve outer end is provided with the little round platform hole of outer imperial palace, and left pipeline and right pipeline end outer wall have all been tightly sleeved sealing
Set, two lock sleeves are socketed in left pipeline and right pipeline respectively, and the sealing shroud end in left pipeline and left pipeline is arranged at a left side
The adapter sleeve outer end round platform in the hole of side, the sealing shroud end in right pipeline and right pipeline is arranged at the adapter sleeve outer end circle on right side
Platform in the hole, adapter sleeve outer side wall is provided with accumulator tank, and lock sleeve is threaded on the outer wall of adapter sleeve outer end, sealing shroud outer end
It is connected on lock sleeve inner bottom surface.
Left pipeline, right pipeline is connected with piston cylinder makes, and first adapter sleeve the inner is close-coupled at piston cylinder end, Ran Hou
Socket lock sleeve, sealing shroud in left pipeline and right pipeline, left pipeline end are plugged in the round platform hole of left side adapter sleeve, by the right side
Pipe end is plugged in the round platform hole of right side adapter sleeve, lock sleeve is threaded on the outer wall of adapter sleeve outer end, lock sleeve
Promote sealing shroud to move inward while moving inward, and make adapter sleeve outer end inside pinch seal set, thus realizing left joint
Joint is tightly connected with left pipeline, right connector and right pipeline.The left joint of this structure setting and right connector are easy to connect, close
Envelope property is good.
Preferably, being connected with sealing bulge loop on main valve clack lower surface, sealing flange upper surface is provided with curved upwards
Raised abutment ring, abutment ring is abutted with sealing bulge loop.The setting connecing ring increased sealing flange and seals close between bulge loop
Sealing property.
Preferably, main valve upper end is provided with installing hole, valve pocket upper end outer wall is closely welded with locating ring, locating ring is tight
It is socketed in installation in the hole, valve gap is connected to installing hole upper end, is provided with sealing ring between locating ring upper end outward flange and valve gap, fixed
The spigot surface that position ring is outward-dipping setting from the bottom up near lower end outer wall.When valve pocket is installed by locating ring and installing hole it
Between realize location and installation, improve the installation accuracy of valve pocket, make valve pocket use process more reliable.The setting of spigot surface is just
Installing hole is inserted when valve pocket is installed.
Preferably, being provided with loss of weight chamber in the middle of main valve clack, loss of weight chamber lower end is connected with medium entrance.Being provided with of lightening hole
Beneficial to material-saving, reduces cost.
Compared with prior art, the beneficial effects of the utility model are：The pilot operated safety valve of anti-high back pressure and vacuum exists
Even if during use, Main valve outlet pressure is also not in the phenomenon that medium flows backwards more than main valve inlet pressure, it is to avoid because being situated between
Matter flows backwards and potential safety hazard.
Brief description
Fig. 1 is a kind of structural representation of the present utility model；
Fig. 2 is the structural representation of backflow controlling organization of the present utility model；
In figure：1st, main valve, 2, pilot valve, 3, enter to press mouth, 4, go out to press mouth, 5, valve body, 6, valve gap, 7, valve pocket, 8, medium entrance,
9th, media outlet, 10, valve pocket, 11, sealing flange, 12, spring, 13, intercommunicating pore, 14, enter pressure pipe, 15, main valve air chamber, 16, live
Plug tube, 17, bypass pipe, 18, left joint, 19, right connector, 20, left pipeline, 21, right pipeline, 22, piston, 23, spring protection post,
24th, locking nut, 25, adapter sleeve, 26, lock sleeve, 27, round platform hole, 28, sealing shroud, 29, sealing bulge loop, 30, abutment ring, 31,
Installing hole, 32, locating ring, 33, spigot surface, 34, loss of weight chamber.
Specific embodiment
Below by specific embodiment, and combine accompanying drawing, the technical solution of the utility model is made further specifically to retouch
State：
Embodiment：A kind of anti-high back pressure and the pilot operated safety valve of vacuum（Referring to accompanying drawing 1, accompanying drawing 2）, including main valve 1, lead
Valve 2, pilot valve is provided with into pressure mouth 3, goes out to press mouth 4, row pressure mouth, and main valve includes valve body 5, valve gap 6, is provided with valve pocket 7, valve body in valve body
It is provided with the medium entrance 8 connecting with valve pocket, media outlet 9, medium entrance is arranged on valve body lower end, and media outlet is arranged on valve
Body right-hand member, is provided with vertically arranged valve pocket 10 in valve pocket, valve pocket upper end and valve gap closely connect, valve pocket lower end and medium entrance
Connection, valve pocket lower end inner wall is provided with inwardly projecting sealing flange 11, and main valve clack lower end seals against in sealing flange upper table
On face, spring 12 is installed between main valve clack upper end and valve gap in valve pocket, main valve clack upper end liftable adjusts and is connected with spring guarantor
Guard post 23.Spring protection post is bolt, and bolt lower end is threaded on main valve clack, and bolt outer wall connects locking nut 24,
Locking nut is connected to main valve clack upper end.Sealing bulge loop 29 is connected with main valve clack lower surface, sealing flange upper surface is provided with
Curved raised abutment ring 30 upwards, abutment ring is abutted with sealing bulge loop.It is provided with loss of weight chamber 34, under loss of weight chamber in the middle of main valve clack
End is connected with medium entrance.Main valve upper end is provided with installing hole 31, and valve pocket upper end outer wall is closely welded with locating ring 32, locating ring
It is tightly sleeved and in the hole is being installed, valve gap is connected to installing hole upper end, is provided with sealing between locating ring upper end outward flange and valve gap
Circle, the spigot surface 33 that locating ring is outward-dipping setting from the bottom up near lower end outer wall.Near lower end position on valve pocket outer wall
It is communicated with hole 13；Medium entrance connects into pressure pipe 14 with entering to press between mouth, constitute in valve pocket between main valve clack upper end and valve gap
Main valve air chamber 15, main valve air chamber and go out to press and connect back to flow control mechanism between mouth, backflow controlling organization includes piston cylinder 16, bypass
Pipe 17, piston cylinder two ends are connected to left joint 18 and right connector 19, and left joint and right connector are connected to left pipeline 20
With right pipeline 21, left pipeline presses mouth to connect with going out, and right pipeline is connected with media outlet, has been slidably mounted piston in piston cylinder
22, bypass pipe one end is connected with piston cylinder, and the other end is connected with main valve air chamber.Left joint and right connector all include adapter sleeve 25,
Lock sleeve 26, adapter sleeve the inner is threaded in piston cylinder end, and adapter sleeve outer end is provided with the little round platform hole of outer imperial palace 27, Zuo Guan
All it has been tightly sleeved sealing shroud 28, two lock sleeves are socketed in left pipeline and right pipeline respectively on road and right pipeline end outer wall,
Sealing shroud end in left pipeline and left pipeline is arranged at the adapter sleeve outer end round platform in the hole in left side, in right pipeline and right pipeline
Sealing shroud end be arranged at the adapter sleeve outer end round platform in the hole on right side, adapter sleeve outer side wall is provided with accumulator tank, locking
External threading is connected on the outer wall of adapter sleeve outer end, and sealing shroud outer end is connected on lock sleeve inner bottom surface.
When the pilot operated safety valve of anti-high back pressure and vacuum uses, under normal circumstances, entering to press mouth and going out pressure on pilot valve
Mouthful connection, medium is by entering pressure pipe, left pipeline enters and promotes piston to move right closing right pipeline in piston cylinder, make bypass pipe with
Left pipeline connects, and medium reaches main valve air chamber, and the pressure medium of system had both acted on the lower section of main valve clack, and acted on main valve clack again
Top, because main valve clack upper plenum medium active area is more than lower dielectric active area, make in pressure differential and spring
With under, main valve clack is closed.When in system, pressure medium is abnormal, meets or exceeds setting pressure, the valve on pilot valve
Lobe is opened, and the pressure export on pilot valve connect with row pressure mouth and outside row pressure, enters to press mouth and goes out to press mouth and isolate, main valve clack is in lower section
Under pressure medium effect, instantaneous unlatching, medium is discharged rapidly in a large number from the media outlet of main valve, the pressure medium in system is extensive
After arriving normal operating pressure again, flap return on pilot valve, entering to press mouth and press mouth to connect with going out on pilot valve, main valve clack return,
Ensure that the safety of system.When main valve media outlet pressure is more than main valve medium entrance pressure（As high back pressure or main valve medium
Import vacuum）, medium flows into piston cylinder from right pipeline and promotes piston to be moved to the left, and closes left pipeline, right pipeline and bypass pipe
Connection, medium flow field enters main valve air chamber, and gas pressure, in main valve clack upper end, promotes main valve clack to move down closing main valve, prevents out
Existing medium flows backwards phenomenon, it is to avoid potential safety hazard because medium flows backwards.
Embodiment described above is one kind of the present utility model preferably scheme, not this utility model is made any
Pro forma restriction, also has other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (7)
1. the pilot operated safety valve of a kind of anti-high back pressure and vacuum, including main valve, pilot valve, pilot valve be provided with into pressure mouth, go out to press mouth,
Row pressure mouth, is characterized in that, main valve includes valve body, valve gap, is provided with valve pocket in valve body, and valve body is provided with the medium connecting with valve pocket and enters
Mouth, media outlet, are provided with valve pocket, valve pocket upper end and valve gap closely connect, and valve pocket lower end is connected with medium entrance, valve in valve pocket
Set lower end inner wall is provided with inwardly projecting sealing flange, and main valve clack lower end seals against on sealing flange upper surface, valve pocket
Spring is installed between interior main valve clack upper end and valve gap, valve pocket outer wall is communicated with hole near lower end position；Medium entrance with
Enter to press and connect into pressure pipe between mouth, in valve pocket between main valve clack upper end and valve gap constitute main valve air chamber, main valve air chamber with go out to press mouth
Between connect back to flow control mechanism, backflow controlling organization includes piston cylinder, bypass pipe, and piston cylinder two ends are connected to left joint
And right connector, left joint and right connector be connected to left pipeline and right pipeline, and left pipeline presses mouth to connect with going out, right pipeline and Jie
Matter outlet, has been slidably mounted piston in piston cylinder, bypass pipe one end is connected with piston cylinder, and the other end is with main valve air chamber even
Logical.
2. the pilot operated safety valve of anti-high back pressure according to claim 1 and vacuum, is characterized in that, main valve clack upper end can rise
Falling tone section is connected with spring protection post.
3. the pilot operated safety valve of anti-high back pressure according to claim 2 and vacuum, is characterized in that, spring protection post is spiral shell
Bolt, bolt lower end is threaded on main valve clack, and bolt outer wall connects locking nut, and locking nut is connected on main valve clack
End.
4. the pilot operated safety valve of anti-high back pressure according to claim 1 and vacuum, is characterized in that, left joint and right connector
All include adapter sleeve, lock sleeve, adapter sleeve the inner is threaded in piston cylinder end, adapter sleeve outer end is provided with the little circle of outer imperial palace
All it has been tightly sleeved sealing shroud, two lock sleeves are socketed in left pipeline and the right side respectively on platform hole, left pipeline and right pipeline end outer wall
On pipeline, the sealing shroud end in left pipeline and left pipeline be arranged at left side adapter sleeve outer end round platform in the hole, right pipeline and
Sealing shroud end in right pipeline is arranged at the adapter sleeve outer end round platform in the hole on right side, and adapter sleeve outer side wall is provided with recovery
Groove, lock sleeve is threaded on the outer wall of adapter sleeve outer end, and sealing shroud outer end is connected on lock sleeve inner bottom surface.
5. the pilot operated safety valve of the anti-high back pressure according to Claims 1-4 any one and vacuum, is characterized in that, main
Sealing bulge loop is connected with flap lower surface, sealing flange upper surface is provided with curved raised abutment ring upwards, abutment ring
Abut with sealing bulge loop.
6. the pilot operated safety valve of the anti-high back pressure according to Claims 1-4 any one and vacuum, is characterized in that, main
Valve upper end is provided with installing hole, and valve pocket upper end outer wall is closely welded with locating ring, and locating ring is tightly sleeved is installing in the hole, valve gap
It is connected to installing hole upper end, sealing ring is installed between locating ring upper end outward flange and valve gap, locating ring near lower end outer wall is
The spigot surface of outward-dipping setting from the bottom up.
7. the pilot operated safety valve of the anti-high back pressure according to Claims 1-4 any one and vacuum, is characterized in that, main
It is provided with loss of weight chamber, loss of weight chamber lower end is connected with medium entrance in the middle of flap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621008779.2U CN205956483U (en) | 2016-08-30 | 2016-08-30 | Prevent high back pressure and vacuous guide's formula relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621008779.2U CN205956483U (en) | 2016-08-30 | 2016-08-30 | Prevent high back pressure and vacuous guide's formula relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205956483U true CN205956483U (en) | 2017-02-15 |
Family
ID=57979107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621008779.2U Expired - Fee Related CN205956483U (en) | 2016-08-30 | 2016-08-30 | Prevent high back pressure and vacuous guide's formula relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205956483U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355573A (en) * | 2017-09-09 | 2017-11-17 | 罗浮阀门集团有限公司 | Double control run-in index safety valve |
| CN107366766A (en) * | 2017-09-09 | 2017-11-21 | 罗浮阀门集团有限公司 | Double control angie type safety valve |
| CN107576052A (en) * | 2017-09-25 | 2018-01-12 | 江阴市南丰科技有限公司 | A kind of firing equipment for Chemical Manufacture |
| CN109373001A (en) * | 2018-12-20 | 2019-02-22 | 明珠阀门集团有限公司 | A kind of forging isolated form vacuum trigger valve |
-
2016
- 2016-08-30 CN CN201621008779.2U patent/CN205956483U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355573A (en) * | 2017-09-09 | 2017-11-17 | 罗浮阀门集团有限公司 | Double control run-in index safety valve |
| CN107366766A (en) * | 2017-09-09 | 2017-11-21 | 罗浮阀门集团有限公司 | Double control angie type safety valve |
| CN107576052A (en) * | 2017-09-25 | 2018-01-12 | 江阴市南丰科技有限公司 | A kind of firing equipment for Chemical Manufacture |
| CN109373001A (en) * | 2018-12-20 | 2019-02-22 | 明珠阀门集团有限公司 | A kind of forging isolated form vacuum trigger valve |
| CN109373001B (en) * | 2018-12-20 | 2024-04-12 | 明珠阀门集团有限公司 | Forging isolation type vacuum starting valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 Termination date: 20210830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |