CN108679281A - Pulse type safety valve - Google Patents
Pulse type safety valve Download PDFInfo
- Publication number
- CN108679281A CN108679281A CN201810931252.4A CN201810931252A CN108679281A CN 108679281 A CN108679281 A CN 108679281A CN 201810931252 A CN201810931252 A CN 201810931252A CN 108679281 A CN108679281 A CN 108679281A
- Authority
- CN
- China
- Prior art keywords
- valve
- main valve
- pilot
- lid
- main
- 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.)
- Pending
Links
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
- F16K17/0433—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 vibration preventing means
-
- 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
- F16K17/10—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 auxiliary valve for fluid operation of the main valve
-
- 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
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
Abstract
The present invention relates to a kind of pulse type safety valves, including main valve, pilot valve and connecting tube；Main valve includes main valve body, main valve clack, main valve stem, main valve lid, and main valve body is internally provided with into vapour chamber, steam discharge chamber and plunger shaft, and main valve clack is placed in into vapour intracavitary；Pilot valve includes pilot valve body, pilot valve valve, guide sleeve, pilot stem, pilot valve lid, pressure setting device；It is characterized in that：Piston cylinder and piston are equipped in plunger shaft, main valve stem is made of lower valve rod and upper valve rod, and the lower end of lower valve rod is fixedly connected with main valve clack, and lower valve rod upper end is fixedly connected with the piston；Upper valve rod lower end is fixedly connected with the piston, and upper end passes through main valve lid to be connect with the pre-compressing device for covering end face mounted on main valve；Pressure setting device uses gravity regulating device.Main valve clack and main valve seat form back seal structure, when pressure medium pulse ripple, will not open main valve clack leakage, have many advantages, such as that set-pressure is stable, sealing reliability is good, small, at low cost.
Description
Technical field
The invention belongs to valve fields, more particularly, to a kind of safety valve.The present invention is suitable for the secondary steaming of temperature-decreased pressure reducer
Safety valve on steam pipe road.
Background technology
Safety valve of the existing use on temperature-decreased pressure reducer indirect steam pipeline, generally using the direct load formula safety of spring
Valve controls the size that valve clack sealing surface acts on the power of valve base sealing downwards, when the safety valve using the elastic force of spring
The pressure medium of inlet side rises, and when upward active force is more than or equal to the spring force, safety valve is opened, when the safety valve into
The pressure medium of mouth side declines, and when upward active force is less than the spring force certain value, safety valve is closed, its shortcoming is that：
When medium temperature rises, spring is easily influenced by temperature, and spring rate declines, and acts on the downward effect of valve clack sealing surface
Power reduces, and safety valve is easy to open in advance, causes set-pressure inaccurate, is easy tod produce when operating pressure is close to set-pressure value
Leakage, poor sealing performance；Moreover, in high pressure or large diameter pipeline system in use, spring is required to lead to product very slightly, very greatly
Volume is big, of high cost.
Invention content
For technological deficiency existing in the prior art, the present invention provides one kind and being used in temperature-decreased pressure reducer secondary steam pipe
On road, there is the pulse type safety valve that set-pressure is accurate, sealing performance is reliable, the bodily form is small, at low cost.
Technical scheme of the present invention includes main valve, pilot valve and connecting tube；Main valve includes main valve body, main valve clack, main valve stem, master
Valve deck, main valve body are internally provided with into vapour chamber, steam discharge chamber and plunger shaft, are placed in main valve body lower part into vapour chamber, steam discharge chamber is placed in main valve
In the middle part of body, plunger shaft is placed in upper part of the main valve body, is equipped with main valve seat sealing surface into vapour chamber upper surface, is set between vapour chamber and steam discharge chamber
There is runner, which is connected into vapour chamber and steam discharge chamber, and main valve clack is placed in into vapour intracavitary, and main valve clack upper surface is equipped with close with main valve seat
The matched sealing surface of cover, main valve lid are fixedly mounted on the main valve body on the upside of plunger shaft, and main valve is covered equipped with pilot port；It leads
Valve includes pilot valve body, pilot valve valve, guide sleeve, pilot stem, pilot valve lid, pressure setting device, in pilot valve body snout cavity and outlet plenum
Between guide valve seat is set, pilot valve valve is located in pilot valve body outlet plenum, lower face have with the mutually matched sealing surface of guide valve seat,
Upper surface is connect by pilot stem with pressure setting device, and clearance fit between pilot stem periphery and pilot valve lid, pilot valve body goes out
Oral cavity is connected to by connecting tube with the pilot port that main valve covers；It is characterized in that：Piston cylinder and piston, piston are equipped in plunger shaft
Plunger shaft is isolated into upper piston chamber and lower piston chamber, main valve stem is made of lower valve rod and upper valve rod, the lower end of lower valve rod and master
Flap is fixedly connected, and lower valve rod upper end is fixedly connected with the piston；Upper valve rod lower end is fixedly connected with the piston, and upper end passes through main valve lid
It connect with the pre-compressing device for covering end face mounted on main valve, is connected using dynamic sealing cooperation between upper valve rod periphery and main valve lid
It connects；Pressure setting device uses gravity regulating device, including holder, connection sheet, weight and lever, connection sheet upper end to connect lever
Middle part, connection sheet lower end connect pilot stem upper end, and pedestal lower end is fixedly connected on pilot valve and covers, and one end of upper end and lever is formed
Hinged connection, weight is horizontally movable to be mounted on the lever other end.
Preferably, vapour adjuster is let out in main valve lid side equipped with connection upper piston chamber, this lets out vapour adjuster by using screw thread
The composition of the adjusting screw in steam vent is let out mounted on main valve lid.
Preferably, the pre-compressing device is made of spring and spring base, and spring base is fixedly mounted on upper valve rod upper end, bullet
Spring is covered mounted on spring base and main valve between end face.
Preferably, tubular cartridge is installed between the pilot stem and pilot valve lid, outside the tubular cartridge inner wall and pilot stem
Clearance fit between disc, pilot stem outer circle are equipped with speed limit slot.
Preferably, guide sleeve is set in pilot valve body outlet plenum, which is fixedly mounted on pilot valve body and pilot valve lid
Between, inside forms upper and lower be oriented to pilot valve valve periphery and coordinates.
The advantage of the invention is that：Using pilot valve come the open and close of control bound, have the bodily form small, at low cost, row
Measure big advantage；Main valve clack forms back seal structure with main valve seat, under the action of pressure medium, has self-sealing function,
When operating pressure generates pulse ripple close to set-pressure value, main valve clack will not be opened and leaked, sealing reliability is good；It utilizes
Releasing the time for vapour adjuster adjusting piston chamber medium is let out, the speed that main valve clack is closed is adjusted, there is blow pressure value, open
Open the good advantage of time adjustability.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode：
Pulse type safety valve as shown in Figure 1, including main valve, pilot valve and connecting tube 14；Main valve include main valve body 3, main valve clack 1,
Main valve stem, main valve lid 6, main valve body 3 are internally provided with into vapour chamber, steam discharge chamber and plunger shaft, and 3 lower part of main valve body is placed in into vapour chamber, with
Pipe-line system medium is connected to, and steam discharge chamber is placed in 3 middle part of main valve body, and plunger shaft is placed in 3 top of main valve body, is equipped with into vapour chamber upper surface
Main valve seat sealing surface, into runner is equipped between vapour chamber and steam discharge chamber, which is connected into vapour chamber and steam discharge chamber, and main valve clack 1 is placed in
Into vapour intracavitary, 1 upper surface of main valve clack be equipped with the matched sealing surface of main valve seat sealing surface, into vapour intracavitary pressure medium push lead
Flap 1 is sealed with main valve seat sealing surface compact, can prevent 1 error starting of main valve clack from opening when pressure medium pulsing fluctuates,
Main valve lid 6 is fixedly mounted on the main valve body 3 on the upside of plunger shaft, and main valve lid 6 is equipped with pilot port；Pilot valve include pilot valve body 24,
Pilot valve is arranged between 24 snout cavity of pilot valve body and outlet plenum in pilot valve valve 23, pilot stem 21, pilot valve lid 20, pressure setting device
Seat, pilot valve valve 23 are located in 24 outlet plenum of pilot valve body, and lower face has to be led to the mutually matched sealing surface of guide valve seat, upper surface
It crosses pilot stem 21 to connect with pressure setting device, clearance fit between 21 periphery of pilot stem and pilot valve lid 20, pilot valve body 24 goes out
Oral cavity is connected to by connecting tube 14 with the pilot port on main valve lid 6；It is characterized in that：Piston cylinder 4 and piston are equipped in plunger shaft
7,7 periphery of piston coordinates with 4 internal chamber wall dynamic sealing of piston cylinder, and plunger shaft is isolated into upper piston chamber 8 and lower piston chamber by piston 7
13, main valve stem is made of lower valve rod 2 and upper valve rod 10, and the lower end of lower valve rod 2 is fixedly connected with main valve clack 1,2 upper end of lower valve rod with
Piston 7 is fixedly connected；10 lower end of upper valve rod is fixedly connected with piston 7, and upper end passes through main valve lid 6 and is mounted on 6 upper end of main valve lid
The pre-compressing device in face connects, and is connected using dynamic sealing between 10 periphery of upper valve rod and main valve lid 6；Pressure setting device
Using gravity regulating device, including holder 16, connection sheet 17, weight 18 and lever 19,17 upper end of connection sheet connects in lever 19
Portion, 17 lower end of connection sheet connect 21 upper end of pilot stem, and 16 lower end of holder is fixedly connected on pilot valve lid 20, upper end and lever 19
One end forms hinged connection, and weight 18 is horizontally movable to be mounted on 19 other end of lever, by mobile weight 18 in lever
Position on 19 adjusts set-pressure value, and locking device is equipped between weight 18 and lever 19.
Vapour adjuster 5 is let out in 6 side of main valve lid equipped with connection upper piston chamber 8, this lets out vapour adjuster 5 by being installed using screw thread
The composition of the adjusting screw in steam vent is let out in main valve lid 6.It lets out vapour adjuster 5 by adjusting letting out for medium in upper piston chamber 8 is adjusted
It puts the time, adjusts the speed that main valve clack 1 is closed.
The pre-compressing device is made of spring 9 and spring base 12, and spring base 12 is fixedly mounted on 10 upper end of upper valve rod, bullet
Spring 9 is mounted between 6 upper surface of spring base 12 and main valve lid, and protective cover 11 is arranged in spring 9 and 12 outside of spring base.
Tubular cartridge 15 is installed, 15 inner wall of tubular cartridge and pilot stem 21 between the pilot stem 21 and pilot valve lid 20
Clearance fit between periphery, 8 pressure medium of upper piston chamber are released from fit clearance between the two, and 21 outer circle of pilot stem is equipped with
Speed limit slot can reduce gas flow rate.
Guide sleeve 22 is set in 24 outlet plenum of pilot valve body, which is fixedly mounted on pilot valve body 24 and pilot valve lid
Between 20, inside forms upper and lower be oriented to 23 periphery of pilot valve valve and coordinates.
When the pressure medium in the pipe-line system is in normal pressure value, effect of the pilot valve valve 23 in gravity regulating device
Under, compress downwards with guide valve seat sealing surface fitted seal, pilot valve is closed, at the same main valve clack 1 in main valve into vapour intracavitary
Pressure medium effect under, be sealed against face pressure and tightly form sealing cooperation with main valve seat sealing surface, main valve is closed；When
When the fluctuation of pressure medium pulsing formula increases in pipe-line system, it is reacted to the thrust upward to main valve clack 1 first and increases, makes master
Flap 1 and main valve seat sealing surface self-tightening sealing avoid main valve clack 1 and pressure medium fluctuation are answered to generate to open by mistake and open phenomenon.
When the pressure medium in the pipe-line system reaches presetting set-pressure value, pilot valve valve 23 is in pressure medium
It is upwardly opened under effect, certain media enters upper piston chamber 8 from snout cavity, by outlet plenum, connecting tube 14, and piston 7 is in upper work
Lower valve rod 2 and main valve clack 1 is pushed to move down under the action of pressure medium in plug chamber 8, main valve clack 1 is opened downwards, in pipe-line system
Medium flows to steam discharge chamber from into vapour chamber, to discharge outward.
When the pressure medium in pipe-line system is returned to normal value, pilot valve valve 23 is closed in the effect of gravity regulating device
Close, the medium in upper piston chamber 8 by connecting tube 14, outlet plenum, using the gap between pilot stem 21 and pilot valve lid 20 to
Atmospheric steam exhaust makes the pressure medium in upper piston chamber 8 decline, when main valve clack 1 is more than by upward active force by downward
When active force, 1 sealing surface compact main valve seat sealing surface of main valve clack is closed.
Claims (7)
1. a kind of pulse type safety valve, including main valve, pilot valve and connecting tube（14）；Main valve includes main valve body（3）, main valve clack（1）、
Main valve stem, main valve lid（6）, main valve body（3）It is internally provided with into vapour chamber, steam discharge chamber and plunger shaft, main valve body is placed in into vapour chamber（3）Under
Portion, steam discharge chamber are placed in main valve body（3）Middle part, plunger shaft are placed in main valve body（3）Top is sealed into vapour chamber upper surface equipped with main valve seat
Face, between vapour chamber and steam discharge chamber be equipped with runner, main valve clack（1）It is placed in into vapour intracavitary, main valve clack（1）Upper surface is equipped with and main valve
The seat matched sealing surface of sealing surface, main valve lid（6）The main valve body being fixedly mounted on the upside of plunger shaft（3）On, main valve lid（6）On
Equipped with pilot port；Pilot valve includes pilot valve body（24）, pilot valve valve（23）, pilot stem（21）, pilot valve lid（20）, pressure setting device,
In pilot valve body（24）Guide valve seat, pilot valve valve are set between snout cavity and outlet plenum（23）Positioned at pilot valve body（24）In outlet plenum,
Lower face have with the mutually matched sealing surface of guide valve seat, upper surface passes through pilot stem（21）It connect, leads with pressure setting device
Valve body（24）Outlet plenum passes through connecting tube（14）With main valve lid（6）On pilot port connection；It is characterized in that：It is equipped in plunger shaft
Piston cylinder（4）And piston（7）, piston（7）Plunger shaft is isolated into upper piston chamber（8）With lower piston chamber（13）；Main valve stem is under
Valve rod（2）And upper valve rod（10）Composition, lower valve rod（2）Lower end and main valve clack（1）It is fixedly connected, lower valve rod（2）Upper end and work
Plug（7）It is fixedly connected；Upper valve rod（10）Lower end and piston（7）It is fixedly connected, upper end passes through main valve lid（6）With mounted on main valve lid
（6）The pre-compressing device of upper surface connects, upper valve rod（10）Periphery and main valve lid（6）Between using dynamic sealing be connected；
Pressure setting device uses gravity regulating device, including holder（16）, connection sheet（17）, weight（18）And lever（19）, connection
Piece（17）Upper end connects lever（19）Middle part, connection sheet（17）Lower end connects pilot stem（21）Upper end, holder（16）Lower end is fixed
It is connected to pilot valve lid（20）On, upper end and lever（19）One end formed hinged connection, weight（18）Horizontally movable peace
Mounted in lever（19）The other end.
2. pulse type safety valve according to claim 1, it is characterised in that：Main valve lid（6）Side is equipped with connection upper piston
Chamber（8）Let out vapour adjuster（5）, this lets out vapour adjuster（5）It is threadably mounted at main valve lid by using（6）Let out the adjusting spiral shell in steam vent
Nail composition.
3. pulse type safety valve according to claim 1 or 2, it is characterised in that：Pre-compressing device is by spring（9）And spring
Seat（12）Composition, spring base（12）It is fixedly mounted on upper valve rod（10）Upper end, spring（9）Mounted on spring base（12）With main valve lid
（6）Between upper surface.
4. pulse type safety valve according to claim 1 or 2, it is characterised in that：The pilot stem（21）With pilot valve lid
（20）Between tubular cartridge is installed（15）, the tubular cartridge（15）Inner wall and pilot stem（21）Clearance fit between periphery,
Pilot stem（21）Outer circle is equipped with speed limit slot.
5. pulse type safety valve according to claim 1 or 2, it is characterised in that：Pilot valve body（24）Setting is led in outlet plenum
To set（22）, the guide sleeve（22）Upper end is fixedly mounted on pilot valve body（24）With pilot valve lid（20）Between, inside and pilot valve valve
（23）Periphery forms upper and lower be oriented to and coordinates.
6. pulse type safety valve according to claim 3, it is characterised in that：The pilot stem（21）With pilot valve lid（20）It
Between tubular cartridge is installed（15）, the tubular cartridge（15）Inner wall and pilot stem（21）Clearance fit between periphery, pilot stem
（21）Outer circle is equipped with speed limit slot.
7. pulse type safety valve according to claim 3, it is characterised in that：Pilot valve body（24）Guide sleeve is set in outlet plenum
（22）, the guide sleeve（22）Upper end is fixedly mounted on pilot valve body（24）With pilot valve lid（20）Between, inside and pilot valve valve（23）Outside
Disc forms upper and lower be oriented to and coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810931252.4A CN108679281A (en) | 2018-08-15 | 2018-08-15 | Pulse type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810931252.4A CN108679281A (en) | 2018-08-15 | 2018-08-15 | Pulse type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108679281A true CN108679281A (en) | 2018-10-19 |
Family
ID=63815397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810931252.4A Pending CN108679281A (en) | 2018-08-15 | 2018-08-15 | Pulse type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108679281A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191022295A (en) * | 1910-09-26 | 1911-04-06 | Friedrich Wilhelm Halter | Improvements in Safety Valves. |
| JPH0854078A (en) * | 1994-08-11 | 1996-02-27 | Nakakita Seisakusho:Kk | Pilot type safety valve |
| CN2279488Y (en) * | 1996-08-30 | 1998-04-22 | 南京铁路分局南京给水电力段 | Micro-resistance slow-closing suction vavle |
| CN201215202Y (en) * | 2008-06-24 | 2009-04-01 | 刘克勤 | Pressure adjustable weight dropper type automatic or manual discharging pressure retaining valve |
| CN201236788Y (en) * | 2008-08-08 | 2009-05-13 | 湖南力威液压设备有限公司 | Energy-saving free side-turning type flap valve buffering mechanism |
| CN102620018A (en) * | 2012-03-29 | 2012-08-01 | 天正阀门有限公司 | High-temperature high-pressure pneumatic control automatic pressure relief valve |
| CN104235478A (en) * | 2014-09-10 | 2014-12-24 | 永一阀门集团有限公司 | Impulse safety valve |
-
2018
- 2018-08-15 CN CN201810931252.4A patent/CN108679281A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191022295A (en) * | 1910-09-26 | 1911-04-06 | Friedrich Wilhelm Halter | Improvements in Safety Valves. |
| JPH0854078A (en) * | 1994-08-11 | 1996-02-27 | Nakakita Seisakusho:Kk | Pilot type safety valve |
| CN2279488Y (en) * | 1996-08-30 | 1998-04-22 | 南京铁路分局南京给水电力段 | Micro-resistance slow-closing suction vavle |
| CN201215202Y (en) * | 2008-06-24 | 2009-04-01 | 刘克勤 | Pressure adjustable weight dropper type automatic or manual discharging pressure retaining valve |
| CN201236788Y (en) * | 2008-08-08 | 2009-05-13 | 湖南力威液压设备有限公司 | Energy-saving free side-turning type flap valve buffering mechanism |
| CN102620018A (en) * | 2012-03-29 | 2012-08-01 | 天正阀门有限公司 | High-temperature high-pressure pneumatic control automatic pressure relief valve |
| CN104235478A (en) * | 2014-09-10 | 2014-12-24 | 永一阀门集团有限公司 | Impulse safety valve |
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