CN109838597A - A kind of anti-back pressure spring Fall lift safety valve - Google Patents
A kind of anti-back pressure spring Fall lift safety valve Download PDFInfo
- Publication number
- CN109838597A CN109838597A CN201910302493.7A CN201910302493A CN109838597A CN 109838597 A CN109838597 A CN 109838597A CN 201910302493 A CN201910302493 A CN 201910302493A CN 109838597 A CN109838597 A CN 109838597A
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- valve
- pressure
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- flap
- sealing surface
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- 238000007789 sealing Methods 0.000 claims abstract description 40
- 238000009434 installation Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 abstract description 10
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Safety Valves (AREA)
- Lift Valve (AREA)
Abstract
The present invention relates to a kind of anti-back pressure spring Fall lift safety valves, including valve body, flap, valve seat, valve deck, valve rod, spring pressure setting device, flap lower end surface center has and the mutually matched sealing surface of valve seat, valve body import channel and valve rod are concentric, exit passageway center line and valve rod central axis；It is characterized in that being connected on the upside of sealing surface of seat with valve body import channel, it is connected on the downside of sealing surface of seat with valve outlet channel, circular passage is constituted between sealing surface of seat excircle and valve body import channel inner round wall, the annular lower end surface on the outside of valve clack sealing surface and the circular passage constitute pressure chamber.For flap without back pressure, valve outlet in-passage pressure fluctuation does not influence the set-pressure value of spring pressure setting device, and flap cracking pressure is equal to set-pressure, has many advantages, such as that opening accurate, pressure stablizes, good to the protective value of pressure vessel or pipeline.
Description
Technical field
The invention belongs to valve field more particularly to a kind of spring loaded safety valves.
Background technique
Spring loaded safety valve is widely used in the pressure-control valve of pressure vessel, pipeline, structure include valve body, flap,
Valve deck, valve rod, pressure setting device, the pressure setting device use spring arrangement.As notification number is CN203500596U
Spring loaded safety valve, the hard soft double matter sealing structures of flap, it is mainly by being fitted to the intracorporal valve seat of safety valve, being oriented to valve pocket, anti-
The combined type flap that punch plate and flap inner shaft, flap housing connect into is constituted, and is closed in the hard of combined type flap bottom face built-up welding
Golden bulge loop and embedded male seal washer form strict hard, soft double matter sealing auxiliary structures with valve seat top end face respectively, utilize
Hard sealing stops air-flow, can extenuate and wash away corrosion function to soft seal, to enhancing sealing pair resistance to erosion anti-cavitation ability
There is positive effect with sealing and anti-leakage performance is improved.The valve body import channel of existing spring loaded safety valve is located under sealing surface of seat
Side, exit passageway are located on the upside of sealing surface of seat, when valve body import channel media pressure is greater than spring set-pressure, push valve
Valve opens release pressure pipeline or container inner pressure, protects the safety of pressure pipeline or container.But this spring loaded safety valve
Valve body outlet end is used in there are when back pressure operating condition, back pressure and spring in valve outlet pipeline jointly generate downwards flap
Pressure leads to the cracking pressure of this spring loaded safety valve not since the easy fluctuation of pressure in valve outlet pipeline is unstable
Stablize, and when back pressure is larger causes flap that cannot open, safeguard protection performance is poor.
Summary of the invention
The present invention is directed to disadvantage of the existing technology, and providing a kind of valve outlet pipeline pressure does not influence spring adjusting pressure
Power, cracking pressure is stable, accurate, the good anti-back pressure spring Fall lift safety valve of safeguard protection performance.
Technical solution of the present invention includes valve body, flap, valve seat, valve deck, valve rod, spring pressure setting device, under flap
End face center have with the mutually matched sealing surface of valve seat, valve body import channel and valve rod are concentric, exit passageway center line and valve
Bar central axis；It is characterized in that being connected on the upside of sealing surface of seat with valve body import channel, go out on the downside of sealing surface of seat with valve body
The connection of mouthful channel, constitutes circular passage between sealing surface of seat excircle and valve body import channel inner round wall, outside valve clack sealing surface
The annular lower end surface and the circular passage of side constitute pressure chamber.
Preferably, valve outlet channel is mutually passed through with valve seat outlet flow and is connect, valve seat outlet flow center line and valve body into
Mouth channel centerline is overlapped.
Preferably, guide sleeve, flap periphery and guide sleeve inner round wall are installed between valve body upper surface and valve deck lower end surface
Between dynamic sealing cooperation, valve deck is fixedly connected with the valve body by double-threaded screw.
Preferably, sealing installation position-arresting disk between guide sleeve upper surface and valve deck.
The present invention is with the advantages of prior art ratio: valve outlet channel is located on the downside of sealing surface of seat, is closing shape
Under state, flap does not influence the set-pressure value of spring pressure setting device, flap without back pressure, valve outlet in-passage pressure fluctuation
Cracking pressure is equal to set-pressure, opens accurate, pressure and stablizes, good to the protective value of pressure vessel or pipeline.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
Anti- back pressure spring Fall lift safety valve as shown in Figure 1, including valve body 1, flap 5, valve seat 4, valve deck 10, valve rod 8,
Spring pressure setting device, 5 lower end surface center of flap have and the mutually matched sealing surface of valve seat 4,1 intake channel of valve body and valve
Bar 8 is concentric, exit passageway center line and 8 central axis of valve rod；It is characterized in that logical with 1 import of valve body on the upside of 4 sealing surface of valve seat
Road connection is connected on the downside of valve seat 4 sealing surface with 1 exit passageway of valve body, when the unlatching of flap 5, medium from side on 4 sealing surface of valve seat to
Circulation is released on the downside of 4 sealing surface of valve seat, i.e., medium flows on the outside of 4 sealing surface of valve seat, outflow, valve on the inside of 4 sealing surface of valve seat
For valve 5 without back pressure, the pressure oscillation in 1 exit passageway of valve body does not influence the setting value of pressure of spring set-pressure, 4 sealing surface of valve seat
Circular passage 2, annular lower end surface and institute on the outside of 5 sealing surface of flap are constituted between 1 intake channel inner round wall of excircle and valve body
It states circular passage 2 and constitutes pressure chamber, is i.e. the outside diameter of flap 5 is greater than its sealing surface diameter, in 5 periphery of flap and sealing surface
Diameter has an annular lower end surface, 1 intake channel pressure medium of valve body act on the annular lower end surface of flap 5 to flap 5 generate to
On thrust, when 1 intake channel pressure medium of valve body reaches spring set-pressure, flap 5 unlatching release in container or pipeline
Pressure protects container or pipe safety.
1 exit passageway of valve body is passed through with 4 outlet flow of valve seat, 3 phase and is connect, 4 outlet flow center line of valve seat and 1 import of valve body
Channel centerline is overlapped.
Guide sleeve 6 is installed between 10 lower end surface of 1 upper surface of valve body and valve deck, 5 periphery of flap and 6 inner round wall of guide sleeve it
Between dynamic sealing cooperate, valve deck 10 is fixedly connected by double-threaded screw 7 with valve body 1, is equipped between 6 lower end surface of guide sleeve and valve body 1
Gasket.
Sealing installation position-arresting disk 9, limits the Lift of flap 5 between 6 upper surface of guide sleeve and valve deck 10.
Spring pressure setting device is made of spring 11, upper spring seat, lower spring cup and adjusting nut 12, and spring 11 is installed
Between upper spring seat and lower spring cup, adjusting nut 12 is threadably mounted on valve deck 10, and 8 lower end of valve rod presses against the back of flap 5
Face center, these belong to well-known technique, are not described in detail.
Claims (4)
1. a kind of anti-back pressure spring Fall lift safety valve, including valve body (1), flap (5), valve seat (4), valve deck (10), valve rod
(8), spring pressure setting device, flap (5) lower end surface center have with valve seat (4) mutually matched sealing surface, valve body (1) into
Mouth channel and valve rod (8) are concentric, valve body (1) exit passageway center line and valve rod (8) central axis；It is characterized in that valve seat (4)
It is connected to, is connected on the downside of valve seat (4) sealing surface with valve body (1) exit passageway, valve seat with valve body (1) intake channel on the upside of sealing surface
(4) circular passage (2) are constituted between sealing surface excircle and valve body (1) intake channel inner round wall, on the outside of flap (5) sealing surface
Annular lower end surface and the circular passage (2) constitute pressure chamber.
2. anti-back pressure spring Fall lift safety valve according to claim 1, it is characterized in that valve body (1) exit passageway and valve seat
(4) outlet flow (3) mutually passes through connection, and valve seat (4) outlet flow center line is overlapped with valve body (1) intake channel center line.
3. anti-back pressure spring Fall lift safety valve according to claim 1 or 2, it is characterized in that valve body (1) upper surface and valve
It covers between (10) lower end surface and guide sleeve (6) is installed, dynamic sealing cooperates between flap (5) periphery and guide sleeve (6) inner round wall, valve
Lid (10) is fixedly connected by double-threaded screw (7) with valve body (1).
4. anti-back pressure spring Fall lift safety valve according to claim 1 or 2, it is characterized in that guide sleeve (6) upper surface with
Sealing installation position-arresting disk (9) between valve deck (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910302493.7A CN109838597A (en) | 2019-04-16 | 2019-04-16 | A kind of anti-back pressure spring Fall lift safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910302493.7A CN109838597A (en) | 2019-04-16 | 2019-04-16 | A kind of anti-back pressure spring Fall lift safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109838597A true CN109838597A (en) | 2019-06-04 |
Family
ID=66887062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910302493.7A Pending CN109838597A (en) | 2019-04-16 | 2019-04-16 | A kind of anti-back pressure spring Fall lift safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109838597A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757422A (en) * | 2021-08-16 | 2021-12-07 | 北京航天石化技术装备工程有限公司 | Safety valve for low-temperature and low-pressure working condition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204127411U (en) * | 2014-09-10 | 2015-01-28 | 天正阀门有限公司 | Differential pressure type safety valve |
| CN204553958U (en) * | 2015-02-03 | 2015-08-12 | 浙江双泰阀门有限公司 | Back pressure automatic adjuster spring formula safety valve |
| CN204961942U (en) * | 2015-09-14 | 2016-01-13 | 天正阀门有限公司 | External pressure formula relief valve |
| CN206175747U (en) * | 2016-10-25 | 2017-05-17 | 永一阀门集团有限公司 | Diaphragm formula low pressure relief valve |
-
2019
- 2019-04-16 CN CN201910302493.7A patent/CN109838597A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204127411U (en) * | 2014-09-10 | 2015-01-28 | 天正阀门有限公司 | Differential pressure type safety valve |
| CN204553958U (en) * | 2015-02-03 | 2015-08-12 | 浙江双泰阀门有限公司 | Back pressure automatic adjuster spring formula safety valve |
| CN204961942U (en) * | 2015-09-14 | 2016-01-13 | 天正阀门有限公司 | External pressure formula relief valve |
| CN206175747U (en) * | 2016-10-25 | 2017-05-17 | 永一阀门集团有限公司 | Diaphragm formula low pressure relief valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757422A (en) * | 2021-08-16 | 2021-12-07 | 北京航天石化技术装备工程有限公司 | Safety valve for low-temperature and low-pressure working condition |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190604 |