CN105003701A - Pressure maintaining valve with variable opening pressure - Google Patents
Pressure maintaining valve with variable opening pressure Download PDFInfo
- Publication number
- CN105003701A CN105003701A CN201510480902.4A CN201510480902A CN105003701A CN 105003701 A CN105003701 A CN 105003701A CN 201510480902 A CN201510480902 A CN 201510480902A CN 105003701 A CN105003701 A CN 105003701A
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- CN
- China
- Prior art keywords
- cylinder
- pressure
- end housing
- safety valve
- core bar
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention discloses a pressure maintaining valve with variable opening pressure. The pressure maintaining valve includes a working end housing, a pressure source end housing, sealing rubber rings, a core rod, an inclined rubber stopper, a safety valve and a high pressure gas cylinder, wherein the working end housing is fixedly connected with the pressure source end housing; the other end of the pressure source end housing is fixedly connected with a safety valve; the safety valve is fixedly connected with the high pressure gas cylinder; the sealing rubber rings are arranged at the end, positioned in the pressure source end housing, of the core rod; the inclined rubber stopper is arranged at the end, positioned in the working end housing, of the core rod. The pressure maintaining valve with variable opening pressure provided by the invention adopts the principle that the external pressure of the safety valve core rod is equal to the internal pressure of the safety valve core rod; such a safety valve does not rely on the deformation of a part to bear the pressure, so that the metal fatigue problem does not exist; the pressure maintaining valve is simple in structure and convenient to install, and the variation range of the opening pressure value is wide.
Description
Technical field
The invention belongs to valve, particularly relate to the pressure maintaining valve that a kind of cracking pressure is variable.
Background technique
Combustion characteristic under different pressure atmosphere is the important indicator of propellant agent, study the combustion characteristic under different pressure atmosphere of propellant agent in the lab, conventional method is lighted by propellant agent to study in seal container, but a large amount of gas can be produced during propellant combustion, pressure in container is changed, cause propellant agent burning not in a reservoir to be that constant voltage is burnt by force, this makes experimental result bigger error.What Zhao Zhibo adopted in " NEPE high-energy propellant coagulates the specificity analysis of phase products of combustion " literary composition is, the basis of the stable-pressure combustion room of Liu Peijin design is allowed the pressure surge in firing chamber reduce by the method for draining pressure release, but the pressure of firing chamber still can change when propellant agent is in burning.
Traditional safety valve, owing to not having external pressure and interior pressure balanced, causes safety valve to be almost be all bear external force by a certain structure, and this just causes the cracking pressure of safety valve or non-adjustable, or adjustable scope is than little.As diaphragm type common on market and spring diaphragm type pressure maintaining valve.The cracking pressure of the pressure maintaining valve of diaphragm type is general all non-adjustable, and the pressure valve cracking pressure regulation range of spring is limited, in addition, regulates the safety valve of cracking pressure easily to make parts fatigue fracture, cause potential safety hazard for this by part distortion.China Patent No. is 201410616038.1 disclose a kind of safety valve, uses many springs in its scheme adopted.This safety valve structure is complicated, is not suitable in test processing use.China Patent No. is 201420084076.2 disclose a kind of New-type safety valve, also belongs to Direct spring loaded safety valve, adopt the safety valve of above-mentioned spring due to the rigidity of spring limited, this safety valve can not in large scope the cracking pressure of regulation safety valve.When test solid propellant burns at various pressures, the pressure range of firing chamber can change larger, to frequently change when adopting cracking pressure to change smaller pressure maintaining valve, easy moving combustion chamber in the process that replacing safety valve is tightened, like this will again to light, and conventional efficient is low.
Summary of the invention
The object of the present invention is to provide the pressure maintaining valve that a kind of cracking pressure is variable, the problem that common opening pressure of safety valve range is little.
The technical solution realizing the object of the invention is: the pressure maintaining valve that a kind of cracking pressure is variable, comprises working end housing, pressure source end housing, sealing rubber ring, core bar, inclined-plane rubber stopper, safety valve and gas cylinder; Described working end housing and pressure source end housing are connected, the other end and the safety valve of pressure source end housing are connected, safety valve and gas cylinder are connected, core bar one end is arranged on in the housing of working end, the other end is arranged in pressure source end housing, one end that core bar is positioned at pressure source end housing is provided with sealing rubber ring, and core bar one end be arranged in the housing of working end is provided with inclined-plane rubber stopper.
Described working end housing comprises the first cylinder, the second cylinder and the 3rd cylinder that connect successively, first cylinder is identical with the second barrel bore, first outside diameter of cylinder is less than the external diameter of the second cylinder, second cylinder is identical with the 3rd outside diameter of cylinder, the internal diameter of the second cylinder is less than the internal diameter of the 3rd cylinder, and the step surface of the inwall intersection of the second cylinder and the 3rd cylinder is First terrace;
Described pressure source end housing comprises the 4th cylinder, the 5th cylinder and the 6th cylinder that connect successively, 4th cylinder is identical with the 5th outside diameter of cylinder, the internal diameter of the 4th cylinder is greater than the internal diameter of the 5th cylinder, 5th outside diameter of cylinder is greater than the 6th outside diameter of cylinder, and the internal diameter of the 5th cylinder is not more than the internal diameter of the 6th cylinder; The other end of the 6th cylinder is connected with safety valve, and safety valve is connected with gas cylinder again.
3rd cylinder of described working end housing and the 4th cylinder of pressure source end housing are connected, and the stack shell of the 3rd cylinder between the 4th cylinder and the second cylinder has several exhaust ports.
Described core bar comprises cylindrical shaft and U-shaped verge ring, is provided with at least one ring annular groove in one end of shaft, and sealing rubber ring is arranged in described annular groove, and the shaft the other end is provided with positioning ring; Positioning ring coordinates with First terrace, realizes core bar axially locating, and the one end with annular groove is arranged in the 5th cylinder; Positioning ring is positioned at the 3rd cylinder, and on the surface of contact of positioning ring and shaft, and be provided with inclined-plane rubber stopper near the side of end, several U-shaped verge rings are uniformly distributed circumferentially on shaft, and the projection of U-shaped verge ring has through hole; Be arranged in the 3rd cylinder with U-shaped verge ring shaft, U-shaped verge ring end face and the 3rd cylinders contact, prevent core bar from radially wobbling.
The diameter of the shaft of described core bar equals the internal diameter of the 5th cylinder.
Compared with prior art, its remarkable advantage is in the present invention: (1) structure is simple, easy for installation; (2) cracking pressure value regulation range is wide.
Accompanying drawing explanation
Fig. 1 is the general illustration of the variable pressure maintaining valve of a kind of cracking pressure of the present invention.
Fig. 2 is the structural representation of the working end shell of the variable pressure maintaining valve of a kind of cracking pressure of the present invention.
Fig. 3 is the structural representation of the pressure source housing of the variable pressure maintaining valve of a kind of cracking pressure of the present invention.
Fig. 4 is the structural representation of the core bar of the variable pressure maintaining valve of a kind of cracking pressure of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Composition graphs 1 ~ Fig. 4, the pressure maintaining valve that a kind of cracking pressure is variable, comprises working end housing 1, pressure source end housing 2, sealing rubber ring 3, core bar 4, inclined-plane rubber stopper 5, safety valve 6, gas cylinder 7.Described working end housing 1 and pressure source end housing 2 are connected, the other end and the safety valve 6 of pressure source end housing 2 are connected, safety valve 6 and gas cylinder 7 are connected, core bar 4 one end is arranged on in working end housing 1, the other end is arranged in pressure source end housing 2, one end that core bar 4 is positioned at pressure source end housing 2 is provided with sealing rubber ring 3, and core bar 4 one end be arranged in working end housing 1 is provided with inclined-plane rubber stopper 5.
Working end housing 1 comprises the first cylinder, the second cylinder and the 3rd cylinder that connect successively, first cylinder is identical with the second barrel bore, first outside diameter of cylinder is less than the external diameter of the second cylinder, second cylinder is identical with the 3rd outside diameter of cylinder, the internal diameter of the second cylinder is less than the internal diameter of the 3rd cylinder, and the step surface of the inwall intersection of the second cylinder and the 3rd cylinder is First terrace.
Pressure source end housing 2 comprises the 4th cylinder, the 5th cylinder and the 6th cylinder that connect successively, 4th cylinder is identical with the 5th outside diameter of cylinder, the internal diameter of the 4th cylinder is greater than the internal diameter of the 5th cylinder, 5th outside diameter of cylinder is greater than the 6th outside diameter of cylinder, and the internal diameter of the 5th cylinder is not more than the internal diameter of the 6th cylinder.The other end of the 6th cylinder is connected by joint with safety valve 6, and safety valve 6 is connected with gas cylinder 7 again.
3rd cylinder of working end housing 1 and the 4th cylinder of pressure source end housing 2 are connected.The stack shell of the 3rd cylinder between the 4th cylinder and the second cylinder has several exhaust ports,
Core bar 4 comprises cylindrical shaft and U-shaped verge ring 4-3, is provided with at least one ring annular groove 4-2 in one end of shaft, and sealing rubber ring 3 is arranged in described annular groove 4-2, and the shaft the other end is provided with positioning ring 4-1.Positioning ring 4-1 coordinates with First terrace, and realize core bar 4 axially locating, the one end with annular groove 4-2 is arranged in the 5th cylinder.Positioning ring 4-1 is positioned at the 3rd cylinder, on the surface of contact of positioning ring 4-1 and shaft, and is provided with inclined-plane rubber stopper 5 near the side of end, prevents positioning ring 4-1 from directly contacting with First terrace, and play seal action.Be arranged in the 3rd cylinder with U-shaped verge ring 4-3 shaft, U-shaped verge ring 4-3 end face and the 3rd cylinders contact, prevent core bar 4 from radially wobbling.Several U-shaped verge rings 4-3 is uniformly distributed circumferentially on shaft, the projection of U-shaped verge ring 4-3 has through hole, the effect of described through hole is, if the 3rd cylinder and the 4th cylinders contact section have air, core bar 4 moves to the 4th cylindrical direction, U-shaped verge ring 4-3 compresses air wherein, and air passes from the through hole U-shaped verge ring 4-3, discharges through exhaust port.
The diameter of shaft equals the internal diameter of the 5th cylinder.
Embodiment 1
The pressure maintaining valve that cracking pressure is variable, comprises working end housing 1, pressure source end housing 2, sealing rubber ring 3, core bar 4, inclined-plane rubber stopper 5, safety valve 6 and gas cylinder 7.Described working end housing 1 and pressure source end housing 2 are connected, the other end and the safety valve 6 of pressure source end housing 2 are connected, safety valve 6 and gas cylinder 7 are connected, core bar 4 one end is arranged on in working end housing 1, the other end is arranged in pressure source end housing 2, one end that core bar 4 is positioned at pressure source end housing 2 is provided with sealing rubber ring 3, and core bar 4 one end be arranged in working end housing 1 is provided with inclined-plane rubber stopper 5.
Working end housing 1 comprises the first cylinder, the second cylinder and the 3rd cylinder that connect successively, first cylinder is identical with the second barrel bore, first outside diameter of cylinder is less than the external diameter of the second cylinder, second cylinder is identical with the 3rd outside diameter of cylinder, the internal diameter of the second cylinder is less than the internal diameter of the 3rd cylinder, and the step surface of the inwall intersection of the second cylinder and the 3rd cylinder is First terrace.First cylinder outer wall is provided with outside thread, is connected with firing chamber.3rd cylinder outer wall is provided with outside thread.
Pressure source end housing 2 comprises the 4th cylinder, the 5th cylinder and the 6th cylinder that connect successively, 4th cylinder is identical with the 5th outside diameter of cylinder, the internal diameter of the 4th cylinder is greater than the internal diameter of the 5th cylinder, and the 5th outside diameter of cylinder is greater than the 6th outside diameter of cylinder, and the internal diameter of the 5th cylinder is less than the internal diameter of the 6th cylinder.6th cylinder outer wall is provided with screw thread, is connected by joint with safety valve 6, and safety valve 6 is connected with gas cylinder 7 again.4th cylinder outer wall is provided with screw thread, coordinates be fixedly connected with the outside thread of the 3rd cylinder.
On the stack shell of the 3rd cylinder between the 4th cylinder and the second cylinder, circumferentially symmetry has 4 exhaust ports,
Core bar 4 comprises cylindrical shaft and four U-shaped verge ring 4-3, is provided with two ring annular groove 4-2 in one end of shaft, and two sealing rubber rings 3 are separately positioned in described annular groove 4-2, and the shaft the other end is provided with positioning ring 4-1.Positioning ring 4-1 is positioned at the 3rd cylinder, and positioning ring 4-1 coordinates with First terrace, realizes core bar 4 axially locating.One end with annular groove 4-2 is arranged in the 5th cylinder.On the surface of contact of positioning ring 4-1 and shaft, and be provided with inclined-plane rubber stopper 5 near the side of end, prevent positioning ring 4-1 from directly contacting with First terrace, and play seal action.Four U-shaped verge ring 4-3 are uniformly distributed circumferentially on shaft, and two vertical projections of U-shaped verge ring 4-3 have the through hole communicated.Be arranged in the 3rd cylinder with U-shaped verge ring 4-3 shaft, U-shaped verge ring 4-3 end face and the 3rd cylinders contact, prevent core bar 4 from radially wobbling.
The diameter of shaft equals the internal diameter of the 5th cylinder.
Working procedure is as follows:
First cylinder of working end housing 1 is screwed in by screw thread and needs, in the airtight firing chamber of voltage stabilizing, to open gas cylinder 7.
Suppose that the internal diameter of the second cylinder is R
1, the internal diameter of the 5th cylinder is R
2, the steady pressure value of the needs of airtight firing chamber is P
1, according to pressure balance formula, the pressure of safety valve 6 is adjusted to P
1(R
1)
2/ (R
2)
2.
First in firing chamber, a certain amount of gas is passed into, the pressure in firing chamber is made to be P1, light propellant agent, along with the burning of propellant agent, propellant agent discharges a large amount of gas, pressure in firing chamber is greater than P1, now bonding force suffered by core bar 4 is uneven, because the pressure in firing chamber is high, core bar 4 moves to the direction away from working end housing 1 first cylinder, now inclined-plane rubber stopper 5 and first step emaciated face from, gap is produced between inclined-plane rubber stopper 5 and First terrace, gas in firing chamber enters the 3rd cylinder by described gap, discharge from the exhaust port the 3rd cylinder, along with the discharge of the gas in firing chamber, Pressure Drop in firing chamber most P
1, now bonding force balance suffered by core bar 4, initial position got back to by core bar 4, inclined-plane rubber stopper 5 contacts again with First terrace, gap between inclined-plane rubber stopper 5 and First terrace disappears, and the gas in firing chamber is not to outward leakage, and the pressure in firing chamber is maintained P
1, a pressure adjustment process completes.
Claims (4)
1. the pressure maintaining valve that cracking pressure is variable, is characterized in that: comprise working end housing (1), pressure source end housing (2), sealing rubber ring (3), core bar (4), inclined-plane rubber stopper (5), safety valve (6) and gas cylinder (7); Described working end housing (1) and pressure source end housing (2) are connected, the other end and the safety valve (6) of pressure source end housing (2) are connected, safety valve (6) and gas cylinder (7) are connected, core bar (4) one end is arranged on in working end housing (1), the other end is arranged in pressure source end housing (2), one end that core bar (4) is positioned at pressure source end housing (2) is provided with sealing rubber ring (3), and core bar (4) one end be arranged in working end housing (1) is provided with inclined-plane rubber stopper (5).
2. the pressure maintaining valve that cracking pressure according to claim 1 is variable, it is characterized in that: described working end housing (1) comprises the first cylinder, the second cylinder and the 3rd cylinder that connect successively, first cylinder is identical with the second barrel bore, first outside diameter of cylinder is less than the external diameter of the second cylinder, second cylinder is identical with the 3rd outside diameter of cylinder, the internal diameter of the second cylinder is less than the internal diameter of the 3rd cylinder, and the step surface of the inwall intersection of the second cylinder and the 3rd cylinder is First terrace;
Described pressure source end housing (2) comprises the 4th cylinder, the 5th cylinder and the 6th cylinder that connect successively, 4th cylinder is identical with the 5th outside diameter of cylinder, the internal diameter of the 4th cylinder is greater than the internal diameter of the 5th cylinder, 5th outside diameter of cylinder is greater than the 6th outside diameter of cylinder, and the internal diameter of the 5th cylinder is not more than the internal diameter of the 6th cylinder; The other end of the 6th cylinder is connected with safety valve (6), and safety valve (6) is connected with gas cylinder (7) again;
3rd cylinder of described working end housing (1) and the 4th cylinder of pressure source end housing (2) are connected, and the stack shell of the 3rd cylinder between the 4th cylinder and the second cylinder has several exhaust ports.
3. the pressure maintaining valve that cracking pressure according to claim 1 and 2 is variable, it is characterized in that: described core bar (4) comprises cylindrical shaft and U-shaped verge ring (4-3), at least one ring annular groove (4-2) is provided with in one end of shaft, sealing rubber ring (3) is arranged in described annular groove (4-2), and the shaft the other end is provided with positioning ring (4-1); Positioning ring (4-1) coordinates with First terrace, and realize core bar (4) axially locating, the one end with annular groove (4-2) is arranged in the 5th cylinder; Positioning ring (4-1) is positioned at the 3rd cylinder, positioning ring (4-1) is with on the surface of contact of shaft, and being provided with inclined-plane rubber stopper (5) near the side of end, several U-shaped verge rings (4-3) are uniformly distributed circumferentially on shaft, and the projection of U-shaped verge ring (4-3) has through hole; Be arranged in the 3rd cylinder with U-shaped verge ring (4-3) shaft, U-shaped verge ring (4-3) end face and the 3rd cylinders contact, prevent core bar (4) from radially wobbling.
4. the pressure maintaining valve that cracking pressure according to claim 3 is variable, is characterized in that: the diameter of the shaft of described core bar (4) equals the internal diameter of the 5th cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510480902.4A CN105003701B (en) | 2015-08-03 | 2015-08-03 | A kind of variable pressure maintaining valve of Opening pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510480902.4A CN105003701B (en) | 2015-08-03 | 2015-08-03 | A kind of variable pressure maintaining valve of Opening pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105003701A true CN105003701A (en) | 2015-10-28 |
| CN105003701B CN105003701B (en) | 2017-09-22 |
Family
ID=54376489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510480902.4A Expired - Fee Related CN105003701B (en) | 2015-08-03 | 2015-08-03 | A kind of variable pressure maintaining valve of Opening pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105003701B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930800A (en) * | 2018-07-12 | 2018-12-04 | 上海海事大学 | A kind of filling of bulky grain high pressure is shut off flow-limiting valve |
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| CN101675282A (en) * | 2007-05-01 | 2010-03-17 | 海德里尔美国制造业有限责任公司 | Pressure relief valve and method for subsea components |
| CN202100784U (en) * | 2011-06-15 | 2012-01-04 | 毛孟其 | Membrane type pressure retaining valve |
| CN102445311A (en) * | 2010-10-15 | 2012-05-09 | 安徽中科智能高技术有限责任公司 | Gas-adjustable flow meter |
| CN203571137U (en) * | 2013-10-17 | 2014-04-30 | 成霖企业股份有限公司 | Pressure maintaining valve |
| US20140124062A1 (en) * | 2012-11-05 | 2014-05-08 | Magna Steyr Fahrzeugtechnik Ag & Co Kg | Valve assembly for pressure storage vessel |
| CN203730866U (en) * | 2014-03-04 | 2014-07-23 | 杨骏鹏 | Two-way air pressure control valve |
| CN204188356U (en) * | 2014-11-18 | 2015-03-04 | 新昌县讯为自动化设备有限公司 | Tube Sheet of Heat Exchanger pipeline leakage stopping pick-up unit |
| CN204900956U (en) * | 2015-08-03 | 2015-12-23 | 南京理工大学 | Changeable surge damping valve of cracking pressure |
-
2015
- 2015-08-03 CN CN201510480902.4A patent/CN105003701B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2703948Y (en) * | 2004-05-14 | 2005-06-08 | 雷铨业 | Automatic-closing pressure-regulating valve |
| CN101675282A (en) * | 2007-05-01 | 2010-03-17 | 海德里尔美国制造业有限责任公司 | Pressure relief valve and method for subsea components |
| CN102445311A (en) * | 2010-10-15 | 2012-05-09 | 安徽中科智能高技术有限责任公司 | Gas-adjustable flow meter |
| CN202100784U (en) * | 2011-06-15 | 2012-01-04 | 毛孟其 | Membrane type pressure retaining valve |
| US20140124062A1 (en) * | 2012-11-05 | 2014-05-08 | Magna Steyr Fahrzeugtechnik Ag & Co Kg | Valve assembly for pressure storage vessel |
| CN203571137U (en) * | 2013-10-17 | 2014-04-30 | 成霖企业股份有限公司 | Pressure maintaining valve |
| CN203730866U (en) * | 2014-03-04 | 2014-07-23 | 杨骏鹏 | Two-way air pressure control valve |
| CN204188356U (en) * | 2014-11-18 | 2015-03-04 | 新昌县讯为自动化设备有限公司 | Tube Sheet of Heat Exchanger pipeline leakage stopping pick-up unit |
| CN204900956U (en) * | 2015-08-03 | 2015-12-23 | 南京理工大学 | Changeable surge damping valve of cracking pressure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930800A (en) * | 2018-07-12 | 2018-12-04 | 上海海事大学 | A kind of filling of bulky grain high pressure is shut off flow-limiting valve |
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| Publication number | Publication date |
|---|---|
| CN105003701B (en) | 2017-09-22 |
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Granted publication date: 20170922 Termination date: 20190803 |