CN105697831A - Safety relief valve for gas pipeline - Google Patents
Safety relief valve for gas pipeline Download PDFInfo
- Publication number
- CN105697831A CN105697831A CN201610182611.1A CN201610182611A CN105697831A CN 105697831 A CN105697831 A CN 105697831A CN 201610182611 A CN201610182611 A CN 201610182611A CN 105697831 A CN105697831 A CN 105697831A
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- CN
- China
- Prior art keywords
- valve
- valve body
- diaphragm
- pressure
- bearing disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002737 fuel gas Substances 0.000 claims description 9
- 239000011324 bead Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 37
- 238000007789 sealing Methods 0.000 description 29
- 238000009792 diffusion process Methods 0.000 description 26
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002301 combined effect Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a safety relief valve for a gas pipeline. The safety relief valve comprises a valve body, a valve cap, a diaphragm, a bearing disk, a blank cap, a spring and a pressure regulating screw, wherein the valve body is a bowl-shaped member, the edge of the valve body is provided with a flange, an air inlet is formed in the side wall of the valve body, an inner cavity of the valve body is provided with a cylindrical structure, a valve port is formed at the contact part of a cylindrical wall and the diaphragm, and an inner hole is connected with the inner cavity of the valve body and an outlet; one end of the valve cap is provided with a flange, and the other end of the valve cap is provided with a threaded hole; the flexible diaphragm is clamped between the valve body and the valve cap; the bearing disk with through holes and guide vanes is buckled on the diaphragm; a spring force acts on the bearing disk and can be regulated by the pressure regulating screw; and the blank cap can be used for preventing foreign matters from entering. When the safety relief valve is used, the air inlet is connected with a protected pipeline, and the outlet is communicated with the atmosphere; when the pressure of the pipeline exceeds the preset relief pressure, the relief valve is opened to release the pressure of the pipeline; and when the pressure of the pipeline is reduced to the relief pressure, the relief valve is closed. The safety relief valve is reliable in closing as well as high in relief speed and high precision; and found through tests, the relief speed is increased by 70%, and the precision is higher than +/-3%.
Description
Technical field
The invention belongs to gas transmission and distribution technical field, be specifically related to a kind of fuel gas pipeline Safety relief valve。
Background technology
In the transmission & distribution process of pipe gas, when the downstream no user of pressure regulator uses combustion gas, then pressure regulator can be automatically switched off, and making by the gas flow of pressure regulator is zero, and now, the downstream pipe of pressure regulator is in air-tight state；Under this sealing state, if the ambient temperature around downstream pipe occurs rising or pressure regulator to leak between upstream and downstream, then the pressure of downstream pipe can constantly raise, so that the safety of the gas equipment on downstream pipe is on the hazard, for this, need, after pressure rises to certain value, the combustion gas of downstream pipe is carried out automatic relief, to maintain the pressure of downstream pipe within safety range。
Summary of the invention
For above-mentioned situation, it is an object of the invention to provide a kind of simple in construction, fuel gas pipeline Safety relief valve with low cost, sensitive。
For reaching above-mentioned purpose, the present invention by the following technical solutions:
A kind of fuel gas pipeline Safety relief valve, it includes valve body, valve gap, diaphragm, force bearing disk, boring cover, spring, tension adjusting screw；Described valve body is circular bowl structure, its bead place is flange arrangement, within it there is a cylindrical structure bottom in chamber along axial line, on cylindrical wall, the one end by body cavity is shaped with valve mouth structure, it it is a through hole in cylinder, its one end is valve opening, is connected with body cavity, and the other end is connected with the external world as outlet；The sidewall of valve body is provided with air inlet；One end of described valve gap is disc-shaped structure, and its bead place is the flange arrangement matched with valve body, and its other end is internal thread hole structure, and disk is with internal thread hole structure on the same axis；Described diaphragm is flexible disc-shaped component, is installed between valve body and the flange of valve gap；Side spiral-lock relative with valve port on diaphragm has a circular force bearing disk, makes diaphragm between force bearing disk and valve port；Being connected firmly and seal between force bearing disk and diaphragm；Apply a suitable active force at the center of force bearing disk to valve port direction and just can cut off the runner between diaphragm and valve port, so that the inner chamber of valve body is in air-tight state；At the cross over pipe having a projection towards outlet plenum side on the center of described force bearing disk, the through hole on cross over pipe can make mutual UNICOM between outlet plenum and back pressure cavity, has the one group of quantity guide vane no less than three at cross over pipe directional spreding radially outside；Coordinating between this group guide vane and valve opening is accurate and loosen, and its effect is ensureing that motion of membrane is flexibly while, it is ensured that remains at same position when diffusion valve is closed repeatedly between valve port with diaphragm and contacts；The described external screw thread on tension adjusting screw matches with the female thread on valve gap, is installed on valve gap, and rotational pressure regulates screw can make it move up and down on valve gap；Being provided with location hole of the spring towards the side of force bearing disk on tension adjusting screw, spring is positioned and is arranged between tension adjusting screw and force bearing disk；Rotational pressure regulates screw can regulate the decrement of spring, thus regulating the size of spring force；Screwed hole port outside valve gap is provided with a boring cover in case foreign body enters。
The operation principle of diffusion valve is: when body cavity does not have fluid pressure, and the spring-force driven dual produced by spring between tension adjusting screw and force bearing disk, on force bearing disk, pushes valve port to diaphragm, makes diaphragm be close to valve port；When body cavity has certain fluid pressure time, this fluid pressure acts on produced fluid force on diaphragm, makes diaphragm have the trend departing from valve port；Under the combined effect of spring force and fluid force, between diaphragm and valve port, produce a sealing force；The spring force of diffusion valve is once set up, and the size of sealing force is dependent on the size of fluid force, namely depends on the fluid pressure of body cavity: the fluid pressure of body cavity is more big, sealing force is more little, otherwise, the fluid pressure of body cavity is more little, and sealing force is more big；When the fluid pressure of body cavity is less, sealing force is more than when can keep the minimum sealing force of sealing valve port state, and diffusion valve is at closed mode；When the fluid pressure of body cavity is gradually increasing, fluid force can become larger, and sealing force will be gradually reduced, and when sealing force is less than when can keep the minimum sealing force of sealing valve port state, diffusion valve is switched on；Along with the unlatching of diffusion valve, the fluid of body cavity is just outwards discharged by outlet plenum；In the process of discharge, due to the Venturi effect that the fluid velocity around the cross over pipe on force bearing disk produces so that back pressure cavity produces a negative pressure, so that the runner between valve port and diaphragm increases rapidly, it is ensured that diffusion valve is quick on the draw；Along with fluid constantly outwards discharges, the fluid pressure of body cavity is gradually reduced, and the flow of discharge gradually decreases, and the fluid velocity around cross over pipe reduces, and the negative pressure of back pressure cavity reduces, and the runner between valve port with diaphragm reduces rapidly until diaphragm contacts with valve port；When sealing force between diaphragm and valve port is gradually increased to keep more than the minimum sealing force of sealing valve port state, diffusion valve is just re-closing off；Guide vane makes diffusion valve contact condition between valve port and diaphragm when repeating to close stablize constant by the guide effect of valve opening, it is to avoid the impact on closing of the valve port impression on diaphragm, it is ensured that the reliability of closedown；Make diffusion valve start open fluid pressure value be exactly diffusion valve diffuse pressure；The size regulating spring force just can regulate the size diffusing force value。
Time actually used, air inlet connects protected pipeline, and outlet plenum connection is specifically diffused pipeline or is directly connected with air, and rotational pressure regulates screw, and what make diffusion valve diffuses the safety margins pressure that pressure is protected pipeline；When the pressure in protected pipeline rises to more than safety margins pressure; diffusion valve is switched on; fluid in protected pipeline just by the runner between valve port and diaphragm to specifically diffusing pipeline or directly to airborne release, make the pressure in protected pipeline decline, reach the purpose of safeguard protection；When the pressure in protected pipeline drops to below safety margins pressure, diffusion valve is just automatically switched off。
The medicine have the advantages that simple in construction, processing, installation, maintenance are convenient, are most importantly quick on the draw, close reliable, diffuse that speed is fast, diffuse precision height；Through actually used test, diffuse speed and can improve 70%, diffuse precision and be better than ± 3%。
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram
In figure, 1-valve body, 2-valve gap, 3-diaphragm, 4-force bearing disk, 5-boring cover, 6-spring, 7-tension adjusting screw。
Detailed description of the invention
The specific embodiment of the present invention is illustrated as follows in conjunction with Fig. 1:
A kind of fuel gas pipeline Safety relief valve, it includes valve body 1, valve gap 2, diaphragm 3, force bearing disk 4, boring cover 5, spring 6, tension adjusting screw 7；Described valve body 1 is circular bowl structure, its bead place is flange arrangement, within it there is a cylindrical structure bottom in chamber along axial line, on cylindrical wall, the one end by valve body 1 inner chamber is shaped with valve mouth structure, it it is a through hole in cylinder, its one end is valve opening, and with valve body 1 intracavity inter-connection, the other end is connected with the external world as outlet；One end of described valve gap 2 is disc-shaped structure, and its bead place is the flange arrangement matched with valve body 1, and its other end is internal thread hole structure, and disk is with internal thread hole structure on the same axis；Described diaphragm 3 is flexible disc-shaped component, is installed between the flange of valve body 1 and valve gap 2；Side spiral-lock relative with valve port on diaphragm 3 has a circular force bearing disk 4, being connected firmly and seal between force bearing disk 4 and diaphragm 3；Apply a suitable active force at the center of force bearing disk 4 to valve port direction and just can cut off the runner between diaphragm 3 and valve port, so that the inner chamber of valve body 1 is in air-tight state；At the cross over pipe having a projection towards outlet plenum side on the center of force bearing disk 4, the through hole on cross over pipe can make mutual UNICOM between outlet plenum and back pressure cavity, has the one group of quantity guide vane no less than three at cross over pipe directional spreding radially outside；Coordinating between this group guide vane and valve opening is accurate and loosen, and its effect is ensureing that motion of membrane is flexibly while, it is ensured that remains at same position when diffusion valve is closed repeatedly between valve port with diaphragm and contacts；The described external screw thread on tension adjusting screw 7 matches with the female thread on valve gap 2, is installed on valve gap 2, and rotational pressure regulates screw 7 can make it move up and down on valve gap 2；Be provided with location hole of the spring on tension adjusting screw 7 towards the side of force bearing disk, spring 6 is positioned and is arranged between tension adjusting screw 7 and force bearing disk 4；Rotational pressure regulates screw 7 can regulate the decrement of spring 6, thus regulating the size of spring force T；Screwed hole port outside valve gap 2 is provided with a boring cover 5 in case foreign body enters。
The operation principle of diffusion valve is: when the inner chamber of valve body 1 does not have fluid pressure, and the spring force T produced by spring 6 between tension adjusting screw 7 and force bearing disk 4 acts on force bearing disk 4, and diaphragm 3 is pushed to valve port, makes diaphragm 3 be close to valve port；When diffusion valve inner chamber has certain fluid pressure time, this fluid pressure acts on produced fluid force F on diaphragm, makes diaphragm 3 have the trend departing from valve port；Under the combined effect of spring force T and fluid force F, producing a sealing force between diaphragm 3 and valve port, it is sized to T-F；The spring force T of diffusion valve is once set up, and the size of sealing force is dependent on the size of fluid force F, namely depends on the fluid pressure of valve body 1 inner chamber: the fluid pressure of valve body 1 inner chamber is more big, sealing force is more little, otherwise, the fluid pressure of valve body 1 inner chamber is more little, and sealing force is more big；When the fluid pressure of valve body 1 inner chamber is less, sealing force is more than when can keep the minimum sealing force of sealing valve port state, and diffusion valve is at closed mode；When the fluid pressure of valve body 1 inner chamber is gradually increasing, fluid force F can become larger, and sealing force will be gradually reduced, and when sealing force is less than when can keep the minimum sealing force of sealing valve port state, diffusion valve is switched on；Along with the unlatching of diffusion valve, the fluid of valve body 1 inner chamber is just outwards discharged by outlet plenum；In the process of discharge, due to the Venturi effect that the fluid velocity around the cross over pipe on force bearing disk 4 produces so that back pressure cavity produces a negative pressure, so that the runner between valve port and diaphragm increases rapidly, it is ensured that diffusion valve is quick on the draw；Along with fluid constantly outwards discharges, the fluid pressure of valve body 1 inner chamber is gradually reduced, and the flow of discharge gradually decreases, and the fluid velocity around cross over pipe reduces, and the negative pressure of back pressure cavity reduces, and the runner between valve port with diaphragm reduces rapidly until diaphragm contacts with valve port；When sealing force between diaphragm 3 and valve port is gradually increased to keep more than the minimum sealing force of sealing valve port state, diffusion valve is just re-closing off；Guide vane makes diffusion valve contact condition between valve port and diaphragm when repeating to close stablize constant by the guide effect of valve opening, it is to avoid the impact on closing of the valve port impression on diaphragm, it is ensured that the reliability of closedown；Make diffusion valve start open fluid pressure value be exactly diffusion valve diffuse pressure；The size regulating spring force T just can regulate the size diffusing force value。
Claims (4)
1. a fuel gas pipeline Safety relief valve, it includes valve body (1), valve gap (2), diaphragm (3), force bearing disk (4), boring cover (5), spring (6), tension adjusting screw (7)；It is characterized in that valve body (1) is for circular bowl structure, its bead place is flange arrangement, within it there is a cylindrical structure bottom in chamber along axial line, on cylindrical wall, the one end by valve body (1) inner chamber is shaped with valve mouth structure, it it is a through hole in cylinder, its one end and valve body (1) intracavity inter-connection, the other end is connected with the external world as outlet；The sidewall of valve body (1) is provided with air inlet；One end of valve gap (2) is disc-shaped structure, and its bead place is the flange arrangement matched with valve body (1), and its other end is internal thread hole structure, and disk is with internal thread hole structure on the same axis；Diaphragm (3) is flexible disc-shaped component, is installed between the flange of valve body (1) and valve gap (2)；A circular force bearing disk (4) is had in the upper side spiral-lock relative with valve port of diaphragm (3)；At the cross over pipe having a projection towards outlet plenum side on the center of force bearing disk (4), through hole on cross over pipe can make mutual UNICOM between outlet plenum and back pressure cavity, has the one group of quantity guide vane no less than three at cross over pipe directional spreding radially outside。
2. the fuel gas pipeline Safety relief valve according to claims 1, it is characterized in that the external screw thread that tension adjusting screw (7) is matched by female thread thereon and on valve gap (2) is arranged on valve gap (2), turning adjusting screw (7) can make it move up and down on valve gap (2)；The center of tension adjusting screw (7) is being provided with a location hole of the spring towards the orientation of force bearing disk (4)。
3. the fuel gas pipeline Safety relief valve according to claims 1 or 2, it is characterised in that spring (6) by hole, the location location and installation on tension adjusting screw (7) between tension adjusting screw (7) and force bearing disk (4)。
4. the fuel gas pipeline Safety relief valve according to claims 1 or 2, it is characterised in that be provided with a boring cover (5) on the screwed hole port in valve gap (2) outside。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610182611.1A CN105697831A (en) | 2016-03-21 | 2016-03-21 | Safety relief valve for gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610182611.1A CN105697831A (en) | 2016-03-21 | 2016-03-21 | Safety relief valve for gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105697831A true CN105697831A (en) | 2016-06-22 |
Family
ID=56232982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610182611.1A Withdrawn CN105697831A (en) | 2016-03-21 | 2016-03-21 | Safety relief valve for gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105697831A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2414266Y (en) * | 2000-03-20 | 2001-01-10 | 张宏业 | Clapper type check valve |
| CN201177076Y (en) * | 2008-03-28 | 2009-01-07 | 张良灿 | One way valve for energy-saving air conditioner |
| CN104930229A (en) * | 2015-06-12 | 2015-09-23 | 浙江春晖智能控制股份有限公司 | Safety relief valve for fuel gas pipeline |
-
2016
- 2016-03-21 CN CN201610182611.1A patent/CN105697831A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2414266Y (en) * | 2000-03-20 | 2001-01-10 | 张宏业 | Clapper type check valve |
| CN201177076Y (en) * | 2008-03-28 | 2009-01-07 | 张良灿 | One way valve for energy-saving air conditioner |
| CN104930229A (en) * | 2015-06-12 | 2015-09-23 | 浙江春晖智能控制股份有限公司 | Safety relief valve for fuel gas pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160622 |
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| WW01 | Invention patent application withdrawn after publication |