CN204300481U - With the Pilot operated safety valve that individual gas sources controls - Google Patents
With the Pilot operated safety valve that individual gas sources controls Download PDFInfo
- Publication number
- CN204300481U CN204300481U CN201420674121.XU CN201420674121U CN204300481U CN 204300481 U CN204300481 U CN 204300481U CN 201420674121 U CN201420674121 U CN 201420674121U CN 204300481 U CN204300481 U CN 204300481U
- Authority
- CN
- China
- Prior art keywords
- valve
- pilot
- pressure
- knock out
- gas sources
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Safety Valves (AREA)
Abstract
The utility model provides a kind of Pilot operated safety valve controlled with individual gas sources, and it comprises main valve and pilot valve; Knock out drum is between pilot valve and individual gas sources, and pressure transducer is between knock out drum and pilot valve; Knock out drum and pilot valve, knock out drum are with individual gas sources, be all connected by pipeline between knock out drum with pressure transducer; The pipeline that knock out drum is connected with individual gas sources arranges reduction valve and safety check; The gas of individual gas sources enters in knock out drum by pipeline, and the gas of knock out drum enters pilot valve bottom chamber by pipeline by the valve shaft of pilot valve.The utility model, by independent stable clean bleed pressure is introduced pilot valve and main valve air chamber, solves the problem of filter medium clogging pilot valve inner flow passage, and the impact that the fluctuation of pipeline internal pressure produces valve performance, expands the Applicable scope of Pilot operated safety valve.
Description
Technical field
The utility model relates to a kind of Pilot operated safety valve for pressure system overpressure protection, is specifically related to a kind of Pilot operated safety valve controlled with individual gas sources.
Background technique
Pilot operated safety valve utilizes pilot valve control bound to open and close, and conventional Pilot operated safety valve has the features such as resistance to high back pressure, large discharge, high pressure and mounting point be compact.Permissible working pressure is close to the Set pressure of safety valve, and performance of safety valve and Lift be not by the impact of back pressure, and less superpressure just can make main valve reach rapidly and entirely open state.Wherein modulating type pilot valve is as the high-end product in pilot valve product, there is the ratio with the increase (minimizing) of system overpressure value and open (closedown), thus reduce the loss of product and the outstanding feature of noise, be the main trend of petroleum chemical industry.
Normal containing oil gas in petroleum chemical industry, dielectric viscosity is high, and it is normal containing a large amount of particulate contamination, MEDIA FLOW very easily causes the channel blockage in pilot valve in safety valve pressure inlet tube line process due to temperature reduction, modulation type pilot valve even can be caused time serious normally to work, the limited speed and high viscosity medium is released in air chamber, also can affect the performance of safety valve under to a certain degree.In addition, there is fluctuation in the working pressure of pipeline, or under the pressure of safety valve outlet line has the operating mode of acute variation, the sealability of safety valve can be affected or cause the abnormal take-off of safety valve.Safety valve, as the core protective barrier of whole industrial system, cannot normally to be opened or opening process slowly all will cause huge potential safety hazard, so it is very necessary to design a kind of Pilot operated safety valve being applicable to this operating mode.
Summary of the invention
The purpose of this utility model is to provide a kind of Pilot operated safety valve controlled with individual gas sources, to solve the pilot valve inner flow passage blocking that traditional modulation formula pilot valve produces in the larger medium of viscosity and the problem of corroding.
Realize the technological scheme of the utility model object: a kind of Pilot operated safety valve controlled with individual gas sources, it comprises main valve and pilot valve, and main valve bottom is main valve flap, and top is main valve air chamber; Its pilot valve comprises valve body, and valve gap is fixed on above valve body, and valve shaft is arranged on valve body; Slide mass and piston arrange in the cavity of valve body, and the bottom of piston connects valve shaft, and the top of piston is connected with spring through slide mass; Spring to be positioned at above piston and inner at valve gap, acts directly on piston; Valve body, piston and slide mass form pilot valve upper chamber jointly; Valve body, piston and valve shaft form pilot valve lower chambers jointly; Pilot valve upper chamber and pilot valve lower chambers are separated by piston;
Pilot valve upper chamber is communicated with main valve inlet by inlet pressure pipe, and pilot valve lower chambers is communicated with main valve air chamber by air chamber pressure pipe, and the outlet of pilot valve valve body is communicated with Main valve outlet by outlet pressure pipe;
Knock out drum is between pilot valve and individual gas sources, and pressure transducer is between knock out drum and pilot valve; Knock out drum and pilot valve, knock out drum are with individual gas sources, be all connected by pipeline between knock out drum with pressure transducer; The pipeline that knock out drum is connected with individual gas sources arranges reduction valve and safety check; The gas of individual gas sources enters in knock out drum by pipeline, and the gas of knock out drum enters pilot valve bottom chamber by pipeline by the valve shaft of pilot valve.
A kind of Pilot operated safety valve controlled with individual gas sources as above, the bonnet described in it is fixed on above valve gap; Adjustment screw is arranged in valve gap top, bonnet.
A kind of Pilot operated safety valve controlled with individual gas sources as above, the valve gap described in it (is bolted and is fixed on valve body.
A kind of Pilot operated safety valve controlled with individual gas sources as above, the pressure interface of the pressure transducer described in it is connected with knock out drum.
A kind of Pilot operated safety valve controlled with individual gas sources as above, when system pressure does not reach Set pressure, system media enters in pilot valve upper chamber by inlet pressure pipe; The gas of individual gas sources reduces to required force value by reduction valve, then enters pilot valve lower chamber, main valve air chamber through knock out drum; Now pilot valve is in closed condition under spring force; The gas of individual gas sources enters in main valve air chamber through air chamber pressure pipe again after pilot valve lower chamber, and main valve flap produces downward sealing force, ensures the sealing of main valve;
When system pressure close to and when reaching Set pressure, piston upwards also cuts off the passage of individual gas sources and main valve air chamber; Pilot valve starts to discharge the pressure in main valve air chamber.Main valve flap is opened gradually, reduces system media pressure;
When system pressure drops to Reseating pressure of a safety valve, piston moves downward pilot valve and closes, and opens the passage of individual gas sources and main valve air chamber; The gas of individual gas sources reenters main valve air chamber, realizes main valve sealing;
When external individual gas sources meets accident interruption, safety check can prevent the backflow in knock out drum; Now, the gas stored in knock out drum still enters in pilot valve and main valve air chamber, ensures that safety valve still can normally work after external gas source accidental interruption;
When the pressure of external individual gas sources occur jumping or bust time, cause the pressure in knock out drum to exceed setting pressure scope, now pressure signal passes to central control chamber by pressure transducer, sends alarm signal, realizes the remote monitoring of pressure.
Effect of the present utility model is: Pilot operated safety valve described in the utility model with independently external gas source to ensure sealing and the performance of safety valve, be particularly useful for petroleum chemical industry medium-high viscosity and the mixture condition containing large granular impurity, and the operating mode that line pressure variations is larger, avoid pilot valve interior detail small flow channels by the problem of dielectric corrosion, blocking, solve the impact that pressure surge produces performance of safety valve, expand the using scope of Pilot operated safety valve.The Pilot operated safety valve controlled with individual gas sources passes through independent stable clean bleed pressure to introduce pilot valve and main valve air chamber, solve the problem of filter medium clogging pilot valve inner flow passage, and the impact that the fluctuation of pipeline internal pressure produces valve performance, expand the Applicable scope of Pilot operated safety valve.Pilot valve has independent air chamber structure, system media is isolated in outside air chamber by blocking type piston by pilot valve, pilot valve only upper piston area is identical with main valve inlet system media, and in pilot valve interior detail runner and main valve air chamber, pressure medium provides by external clean individual gas sources.
Accompanying drawing explanation
Fig. 1 is a kind of Pilot operated safety valve structural representation controlled with individual gas sources described in the utility model;
Fig. 2 is the pilot valve structure schematic diagram of the Pilot operated safety valve that band individual gas sources controls.
In figure: 1-main valve; 2-pilot valve; 3-knock out drum; 4-reduction valve; 5-main valve air chamber; 6-pressure transducer; 7-air chamber pressure pipe; 8-inlet pressure pipe; 9-main valve flap; 10-safety check; 11-individual gas sources; 12-outlet pressure pipe; 13-pilot valve upper chamber; 14-pilot valve lower chambers; 15-piston; 16-valve body; 17-valve shaft; 18-valve gap; 19-adjusts screw; 20-spring; 21-bonnet; 22-slide mass.
A. inlet pressure; B. knock out drum internal pressure; C. communicate with main valve air chamber; D. communicate with Main valve outlet; E. air chamber pressure; F. communicate with knock out drum; G. communicate with main valve inlet.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of Pilot operated safety valve with individual gas sources control described in the utility model is further described.
As illustrated in figs. 1 and 2, a kind of Pilot operated safety valve controlled with individual gas sources described in the utility model, it mainly comprises main valve 1, pilot valve 2, knock out drum 3, reduction valve 4, safety check 10, pressure transducer 6 and individual gas sources 11 etc.
Main valve 1 bottom is main valve flap 9, and top is main valve air chamber 5.
Pilot valve 2 comprises valve body 16, and valve gap 18 is bolted and is fixed on above valve body 16, and valve shaft 17 is arranged in valve body 16.Bonnet 21 is fixed on above valve gap 18; Adjustment screw 19 is arranged in valve gap 18 top, bonnet 21.
Slide mass 22 and piston 15 arrange in the cavity of valve body 16, and the bottom of piston 15 connects valve shaft 17, and the top of piston 15 is connected with spring 20 through slide mass 22; Spring 20 to be positioned at above piston 15 and inner at valve gap 18, acts directly on piston 15; Valve body 16, piston 15 and slide mass 22 form pilot valve upper chamber 13 jointly; Valve body 16, piston 15 and valve shaft 17 form pilot valve lower chambers 14 jointly; Pilot valve upper chamber 13 and pilot valve lower chambers 14 are separated by piston 15;
Pilot valve upper chamber 13 is communicated with main valve inlet by inlet pressure pipe 8, and pilot valve lower chambers 14 is communicated with main valve air chamber 5 by air chamber pressure pipe 7, and the outlet of pilot valve valve body 16 is communicated with Main valve outlet, as shown in G, C, D in Fig. 2 by outlet pressure pipe 12;
Knock out drum 3 is between pilot valve 2 and individual gas sources 11, and pressure transducer 6 is between knock out drum 3 and pilot valve 2; Knock out drum 3 and pilot valve 2, knock out drum 3 are with individual gas sources 11, be all connected by pipeline between knock out drum 3 with pressure transducer 6; The pipeline that knock out drum 3 is connected with individual gas sources 11 arranges reduction valve 4 and safety check 10; The gas of individual gas sources 11 enters in knock out drum 3 by pipeline, and the gas of knock out drum 3 enters in pilot valve lower chambers 14, by pipeline as shown in F, B in Fig. 2 by the valve shaft 17 of pilot valve.
The pressure interface of pressure transducer 6 is connected with knock out drum 3, and electric interfaces is connected with the electrical equipment at scene, and its effect is that pressure signal is converted into electrical signal, thus realizes the remote monitoring of pressure.According to the force value of required individual gas sources, the parameter of setting reduction valve 4 and pressure transducer 6.
When system pressure does not reach Set pressure, system media enters in pilot valve upper chamber 13 by inlet pressure pipe 8; The gas of individual gas sources reduces to required force value by reduction valve 4, then enters pilot valve lower chamber 14, main valve air chamber 5 through knock out drum 3; Now pilot valve 2 is in closed condition under spring force; The gas of individual gas sources enters in main valve air chamber 5 through air chamber pressure pipe 7 again after pilot valve lower chamber 14, and main valve flap 9 produces downward sealing force, ensures the sealing of main valve;
When system pressure close to and when reaching Set pressure, piston 15 moves upward and cuts off the passage of individual gas sources and main valve air chamber 5; Pilot valve 2 starts to discharge the pressure in main valve air chamber 5.Main valve flap 9 is opened gradually, reduces system media pressure;
When system pressure drops to Reseating pressure of a safety valve, piston 14 moves downward and impels pilot valve 2 to close, and opens the passage of individual gas sources and main valve air chamber 5; The gas of individual gas sources 11 reenters main valve air chamber 5, realizes main valve 1 and seals;
When external individual gas sources 11 meets accident interruption, safety check 10 can prevent the backflow in knock out drum 3; Now, the gas stored in knock out drum 3 still enters in pilot valve 2 and main valve air chamber 5, ensures that safety valve still can normally work after external gas source accidental interruption;
When the pressure of external individual gas sources 11 occur jumping or bust time, cause the pressure in knock out drum 3 to exceed setting pressure scope, now pressure signal passes to central control chamber by pressure transducer 6, sends alarm signal, realizes the remote monitoring of pressure.
Pilot valve 2 has independent air chamber structure: the medium of traditional modulation type Pilot operated safety valve enters pilot valve inside and main valve air chamber by main valve inlet, and namely pilot valve interior media is identical with main valve inlet system media.And adopt pilot valve of the present utility model to be isolated in outside air chamber by blocking type piston by system media, pilot valve only upper piston area is identical with main valve inlet system media, in pilot valve interior detail runner and main valve air chamber, pressure medium provides by external clean individual gas sources, avoids system media and enters pilot valve inner flow passage and produce the problems such as blocking, corrosion.
The Pilot operated safety valve of the utility model structure has Set pressure and good sealability accurately.Pilot valve induction main valve inlet place pressure, when system pressure is close to Set pressure, pilot valve internal structure starts action, cut off passage between external gas source and main valve air chamber, and pilot valve starts to discharge main valve air chamber pressure.When system pressure reaches Set pressure, main valve will be opened.The design of pilot valve special construction can ensure the action of Pilot operated safety valve accurately and reliably.Before system pressure is close to Set pressure, pilot valve does not cut off passage between bleed pressure and main valve air chamber.Even if system pressure has larger fluctuation, main valve air chamber pressure is still external gas source pressure, can keep the sealability that main valve is good.As shown in A, E in Fig. 2.
The reliability of individual gas sources.Adopt the Pilot operated safety valve of the utility model structure with annexes such as knock out drum, reduction valve, safety check and pressure transducers, ensure the reliable and stable of individual gas sources.The pressure of external gas source is often higher than the pressure needed for Pilot operated safety valve, and gas needs by just entering safety valve after reduction valve.Before valve, configure knock out drum and safety check to store the post-decompression gas of certain volume, safety check effect still can keep certain pressure in knock out drum after preventing external gas source pressure from surprisingly breaking simultaneously, makes Pilot operated safety valve regular event 3 ~ 4 times.
Claims (5)
1., with the Pilot operated safety valve that individual gas sources controls, it comprises main valve (1) and pilot valve (2), and main valve (1) bottom is main valve flap (9), and top is main valve air chamber (5); It is characterized in that:
Pilot valve (2) comprises valve body (16), and valve gap (18) is fixed on valve body (16) top, and valve shaft (17) is arranged on valve body (16); Slide mass (22) and piston (15) arrange in the cavity of valve body (16), the bottom of piston (15) connects valve shaft (17), and the top of piston (15) is connected with spring (20) through slide mass (22); Spring (20) is positioned at piston (15) top and in valve gap (18) inside, acts directly on piston (15); Valve body (16), piston (15) and slide mass (22) form pilot valve upper chamber (13) jointly; Valve body (16), piston (15) and valve shaft (17) form pilot valve lower chambers (14) jointly; Pilot valve upper chamber (13) and pilot valve lower chambers (14) are separated by piston (15);
Pilot valve upper chamber (13) is communicated with main valve inlet by inlet pressure pipe (8), pilot valve lower chambers (14) is communicated with main valve air chamber (5) by air chamber pressure pipe (7), and the outlet of pilot valve valve body (16) is communicated with Main valve outlet by outlet pressure pipe (12);
Knock out drum (3) is positioned between pilot valve (2) and individual gas sources (11), and pressure transducer (6) is positioned between knock out drum (3) and pilot valve (2); Knock out drum (3) and pilot valve (2), knock out drum (3) are with individual gas sources (11), be all connected by pipeline between knock out drum (3) with pressure transducer (6); The pipeline that knock out drum (3) is connected with individual gas sources (11) arranges reduction valve (4) and safety check (10); The gas of individual gas sources (11) enters in knock out drum (3) by pipeline, and the gas of knock out drum (3) is entered in pilot valve lower chambers (14) by the valve shaft (17) of pipeline by pilot valve.
2. a kind of Pilot operated safety valve controlled with individual gas sources according to claim 1, is characterized in that: at the fixing bonnet (21) in described valve gap (18) top; Adjustment screw (19) is arranged in valve gap (18) top, bonnet (21).
3. a kind of Pilot operated safety valve controlled with individual gas sources according to claim 1, is characterized in that: described valve gap (18) is bolted and is fixed on valve body (16).
4. a kind of Pilot operated safety valve controlled with individual gas sources according to claim 1, is characterized in that: the pressure interface of described pressure transducer (6) is connected with knock out drum (3).
5. a kind of Pilot operated safety valve controlled with individual gas sources according to claim 1, is characterized in that:
When system pressure does not reach Set pressure, system media enters in pilot valve upper chamber (13) by inlet pressure pipe (8); The gas of individual gas sources reduces to required force value by reduction valve (4), then enters pilot valve lower chamber (14), main valve air chamber (5) through knock out drum (3); Now pilot valve (2) is in closed condition under spring force; The gas of individual gas sources enters in main valve air chamber (5) through air chamber pressure pipe (7) again after pilot valve lower chamber (14), in the sealing force that the upper generation of main valve flap (9) is downward, ensures the sealing of main valve;
When system pressure close to and when reaching Set pressure, piston (15) moves upward and cuts off the passage of individual gas sources and main valve air chamber (5); Pilot valve (2) starts to discharge the pressure in main valve air chamber (5); Main valve flap (9) is opened gradually, reduces system media pressure;
When system pressure drops to Reseating pressure of a safety valve, piston (14) moves downward pilot valve (2) and closes, and opens the passage of individual gas sources and main valve air chamber (5); The gas of individual gas sources (11) reenters main valve air chamber (5), realizes main valve (1) sealing;
When external individual gas sources (11) meets accident interruption, safety check (10) can prevent the backflow in knock out drum (3); Now, the gas stored in knock out drum (3) still enters in pilot valve (2) and main valve air chamber (5), ensures that safety valve still can normally work after external gas source accidental interruption;
When the pressure of external individual gas sources (11) occur jumping or bust time, the pressure in knock out drum (3) is caused to exceed setting pressure scope, now pressure signal passes to central control chamber by pressure transducer (6), sends alarm signal, realizes the remote monitoring of pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420674121.XU CN204300481U (en) | 2014-11-05 | 2014-11-05 | With the Pilot operated safety valve that individual gas sources controls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420674121.XU CN204300481U (en) | 2014-11-05 | 2014-11-05 | With the Pilot operated safety valve that individual gas sources controls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204300481U true CN204300481U (en) | 2015-04-29 |
Family
ID=53106022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420674121.XU Withdrawn - After Issue CN204300481U (en) | 2014-11-05 | 2014-11-05 | With the Pilot operated safety valve that individual gas sources controls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204300481U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358917A (en) * | 2014-11-05 | 2015-02-18 | 北京航天动力研究所 | Pilot operated safety valve with independent gas source control |
| CN108644438A (en) * | 2018-05-29 | 2018-10-12 | 钟晓山 | A kind of pneumatic breather valve of pilot-operated type |
| CN111356873A (en) * | 2017-11-16 | 2020-06-30 | 气体运输技术公司 | Device for inerting a liquefied gas storage tank of a ship for transporting liquefied gas |
| CN113431934A (en) * | 2021-07-28 | 2021-09-24 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
-
2014
- 2014-11-05 CN CN201420674121.XU patent/CN204300481U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358917A (en) * | 2014-11-05 | 2015-02-18 | 北京航天动力研究所 | Pilot operated safety valve with independent gas source control |
| CN104358917B (en) * | 2014-11-05 | 2017-03-01 | 北京航天石化技术装备工程有限公司 | The pilot operated safety valve controlling with individual gas sources |
| CN111356873A (en) * | 2017-11-16 | 2020-06-30 | 气体运输技术公司 | Device for inerting a liquefied gas storage tank of a ship for transporting liquefied gas |
| CN111356873B (en) * | 2017-11-16 | 2022-06-21 | 气体运输技术公司 | Device for inerting a liquefied gas storage tank of a ship for transporting liquefied gas |
| CN108644438A (en) * | 2018-05-29 | 2018-10-12 | 钟晓山 | A kind of pneumatic breather valve of pilot-operated type |
| CN108644438B (en) * | 2018-05-29 | 2020-02-14 | 钟晓山 | Pilot-operated pneumatic breather valve |
| CN113431934A (en) * | 2021-07-28 | 2021-09-24 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
| CN113431934B (en) * | 2021-07-28 | 2023-01-06 | 吴江市东吴机械有限责任公司 | Pilot operated safety valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204300481U (en) | With the Pilot operated safety valve that individual gas sources controls | |
| CN203272920U (en) | Fluid adjusting device | |
| CN104358917A (en) | Pilot operated safety valve with independent gas source control | |
| CN104763371B (en) | Free downslide tubing plug and its application method can be dragged for | |
| CN203223605U (en) | Diaphragm pilot valve capable of detecting pressure and flow rate | |
| CN202327281U (en) | Membrane type pressure reducing valve | |
| CN201176863Y (en) | Pressure and flow controlled gas recovery well head safety closing device | |
| CN203500629U (en) | Piston type control gas chamber structure for safe cut-off valves | |
| CN207145722U (en) | A kind of water attack release valve | |
| CN205683710U (en) | A kind of separator for realizing gas-liquid delivery | |
| CN202371285U (en) | Diaphragm type anti-cavitation and high-pressure-difference adjustable pressure-reducing valve | |
| CN103542153B (en) | Overpressure prevention pressure-relief valve | |
| CN101625032B (en) | Special control valve for oxygen emptying | |
| CN204042454U (en) | The long-range pressure line protective gear of Pilot operated safety valve | |
| RU2548586C1 (en) | Pressure regulator module | |
| CN209725260U (en) | A kind of hole plate type throttle valve of extracting device of oil | |
| CN103511696B (en) | A kind of excess flow valve that can realize automatically reseting with zero leakage | |
| CN103353001B (en) | Booster shutoff valve | |
| CN202850944U (en) | Air discharging device of oil well casing | |
| CN106314410B (en) | Double-pipeline trailer brake valve | |
| US20170184217A1 (en) | Pressure relief device | |
| CN204312789U (en) | Gas gathering and transportation specialty control gear | |
| CN203549028U (en) | Overpressure prevention pressure reducing valve | |
| CN221257826U (en) | Pilot-operated pressure reducing valve | |
| CN203784402U (en) | Overflow protection valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150429 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |