CN110131477B - Multistage throttle labyrinth relief pressure valve - Google Patents
Multistage throttle labyrinth relief pressure valve Download PDFInfo
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- CN110131477B CN110131477B CN201910455730.3A CN201910455730A CN110131477B CN 110131477 B CN110131477 B CN 110131477B CN 201910455730 A CN201910455730 A CN 201910455730A CN 110131477 B CN110131477 B CN 110131477B
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- valve core
- sliding sleeve
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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
- 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
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention provides a multi-stage throttling labyrinth type pressure reducing valve which comprises a spring cover, a shell and a lower end cover, wherein an adjusting nut is arranged at the upper end of the spring cover, an adjusting spring is arranged between the adjusting nut and a valve core, a return spring is arranged between the valve core and the lower end cover, the valve core is positioned in a sliding sleeve, the sliding sleeve is fixed in the shell, a high-pressure cavity with an inlet and an outlet is formed in the shell, a transition cavity is formed in the valve core, a low-pressure cavity I is formed in the shell and the sliding sleeve, a low-pressure cavity II is formed in the lower end cover and the valve core, upper throttling ports communicating the low-pressure cavity I with the transition cavity are correspondingly arranged on the sliding sleeve and the valve core, middle throttling ports communicating the high-pressure cavity with the transition cavity are correspondingly arranged on the sliding sleeve. The invention has the advantages that: the pressure regulation is smooth and accurate; the anti-interference capability of the valve is improved; the structure is simple, the maintenance is convenient, and the service life is long; the cavitation risk of the first-stage throttling high pressure difference is reduced; the feedback medium pressure is more sensitive and the precision is higher.
Description
Technical Field
The invention relates to a pressure reducing valve, in particular to a multi-stage throttling labyrinth pressure reducing valve.
Background
The multi-stage throttling labyrinth type pressure reducing valve reduces the inlet pressure to the required outlet pressure by manually adjusting the loading force of a disc spring, and can automatically keep a certain relatively stable value of the outlet pressure by using the energy of a medium when the inlet pressure and the flow change.
The pressure reducing valve commonly used at present is generally a one-stage throttling valve, and a valve clack is conical or planar. The pressure reducing valve with the one-stage throttling function has good use effect under low pressure drop, but cavitation erosion is easily generated under high pressure drop to cause premature damage of a throttling element. Therefore, two or more pressure reducing valves are often used in series for high pressure drop, so as to achieve the purpose of reducing the outlet pressure to the required pressure and stably operating. But this increases the operating cost of the system and the incidence and instability of product failures.
Disclosure of Invention
The invention provides a multi-stage throttling labyrinth type pressure reducing valve, which solves the problem that an existing pressure reducing valve is prone to cavitation erosion to cause premature damage of a throttling piece when one-time throttling pressure drop is overlarge.
The technical scheme of the invention is realized as follows: the utility model provides a multistage throttle labyrinth relief pressure valve, includes spring housing, casing and lower end cover, and the upper end of spring housing is equipped with adjusting nut, is equipped with adjusting spring between adjusting nut and the case, is equipped with reset spring between case and the lower end cover, the case be located the slip cap, the slip cap is fixed in the casing, the casing forms the high-pressure chamber of importing and exporting, forms the transition chamber in the case, the casing forms low-pressure chamber I with the slip cap, forms low-pressure chamber II in lower end cover and the case, correspond on slip cap and the case and be equipped with the last orifice of throttling that feeds through low-pressure chamber I and transition chamber, correspond on slip cap and the case and be equipped with the well orifice of throttling that feeds through high-pressure chamber and transition chamber, be equipped with the lower orifice of feeding through low-pressure chamber II and transition chamber on the case.
A damping cavity is formed in the sliding sleeve, and a throttling hole communicated with the low-pressure cavity I and the damping cavity is formed in the sliding sleeve.
An adjusting spring is arranged between the adjusting nut and the diaphragm assembly, the diaphragm assembly is connected with the valve core, the sliding sleeve and the diaphragm assembly form a damping cavity, and the diaphragm of the diaphragm assembly is fixed in the spring cover.
The diaphragm of the diaphragm assembly is arranged between the spring cover and the shell.
The diaphragm assembly comprises a spring seat, a U-shaped diaphragm and a supporting seat, the spring seat is in contact with the adjusting spring, the spring seat is connected with the supporting seat, one end of the U-shaped diaphragm is arranged between the spring seat and the supporting seat, the other end of the U-shaped diaphragm is fixed in the spring cover, and the supporting seat is connected with the valve core.
The valve core is a cylindrical valve core.
And a plane bearing is arranged between the adjusting nut and the adjusting spring.
The inlet of the shell is connected with an inlet joint, and the outlet of the shell is connected with an outlet joint.
The sliding sleeve is arranged between the spring cover and the shell.
Key points of the invention are illustrated:
a) the plane bearing is added at the position of the adjusting spring, so that the pressure is adjusted smoothly and noiselessly, relative sliding between the supporting ring and the adjusting spring is avoided in the adjusting process, the adjusting hand feeling is light, and the pressure is adjusted more accurately;
b) the U-shaped diaphragm assembly is used as a pressure feedback element, so that the stroke is larger, the diaphragm rigidity is smaller, and the response of outlet pressure change is more sensitive;
c) the valve core adopts a columnar structure, medium enters the transition cavity of the regulating valve core after being subjected to primary throttling from the high-pressure cavity at the inlet end of the pressure reducing valve through the middle throttling port of the regulating valve core, and the upper area and the lower area of the cylindrical space of the transition cavity are the same, so that the fluid pressure borne by the upper part and the lower part are mutually offset to achieve balance, and the throttling area is not influenced by the change of the inlet pressure; the medium enters a low-pressure cavity at the outlet end of the reducing valve after secondary throttling through upper and lower throttling holes of the regulating valve core. The total area of the upper and lower secondary orifices is the same as that of the middle primary throttling orifice, and the two-stage throttling pressure is similar, namely the total throttling pressure of the reducing valve is basically distributed evenly, so that the flow speed is controlled; in addition, the upper throttling openings, the middle throttling openings and the lower throttling openings are all arranged annularly and evenly, and the lateral force is eliminated.
d) The damping structure is added, the structure is more reasonable, the impact resistance of the valve is improved, the outlet pressure is more stable, the precision is higher, and the anti-interference capability of the valve is improved.
The invention has the advantages that:
a) a plane bearing is added between the adjusting nut and the adjusting spring for transition, so that the pressure adjustment is smooth and accurate;
b) the damping cavity is added on the low-pressure cavity, so that the impact resistance of the valve is improved, the outlet pressure is more stable, the precision is higher, and the anti-interference capability of the valve is improved;
c) the pressure regulating valve core adopts a columnar structure, so that the balance of medium pressure is easier to realize, the interference resistance of medium pressure is improved, and meanwhile, the pressure regulating valve core is simple in structure, convenient to maintain and long in service life;
d) multi-stage throttling is realized in a single throttling element, the cavitation risk of high pressure difference of the first-stage throttling is reduced, the size is reduced, and the cost is reduced;
e) the U-shaped diaphragm is adopted for pressure feedback, the diaphragm is lower in rigidity, the feedback medium pressure is more sensitive, and the precision is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of a diaphragm assembly according to the present invention.
FIG. 3 is a schematic diagram of the pressure regulating throttling status of the present invention.
In the figure: 1-adjusting nut, 2-locking nut, 3-plane bearing, 4-spring cover, 5-adjusting spring, 6-diaphragm component, 7-sliding sleeve, 8-valve core, 9-shell, 10-inlet joint, 11-reset spring, 12-lower end cover, 13-outlet joint; 61-a spring seat, 62-a U-shaped diaphragm, 63-a compression nut, 64-a supporting seat and 65-a sealing ring; a-a high pressure cavity, B-a transition cavity, C1-a low pressure cavity I, C2-a low pressure cavity II, D-a damping cavity; j1-middle orifice, J2-upper orifice, J3-lower orifice.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 to 3, the multi-stage throttling labyrinth pressure reducing valve comprises a spring cover 4, a housing 9, an inlet joint 10, a lower end cover 12 and an outlet joint 13, wherein internal threads at the lower end of the spring cover 4 are connected with external threads at the upper end of the housing 9, the housing 9 and the lower end cover 12 are connected through bolts, an inlet of the housing 1 is in threaded connection with the inlet joint 10, and an outlet of the housing 1 is in threaded connection with the outlet joint 13.
The upper end and the adjusting nut 1 threaded connection of spring housing 4 to utilize lock nut 2 to lock spring housing 4 and adjusting nut 1, be equipped with flat bearing 3 between adjusting nut 1 and the adjusting spring 5, adjusting spring 5's the other end and the contact of diaphragm subassembly 6, diaphragm subassembly 6 is connected with case 8, case 8 is established in sliding sleeve 7, sliding sleeve 7 and diaphragm subassembly 6's diaphragm all compresses tightly between spring housing 4 and casing 9, be equipped with reset spring 11 between case 8 and the lower end cover 12.
A high-pressure cavity A of an inlet and an outlet is formed in a shell 9, a transition cavity B is formed in a valve core 8, a low-pressure cavity IC1 is formed by the shell 9 and a sliding sleeve 7, a low-pressure cavity IIC2 is formed in a lower end cover 12 and the valve core 8, the valve core 8 adopts a cylindrical structure, an upper throttling port J2 communicated with the low-pressure cavity IC1 and the transition cavity B is correspondingly arranged on the sliding sleeve 7 and the valve core 8, a middle throttling port J1 communicated with the high-pressure cavity A and the transition cavity B is correspondingly arranged on the sliding sleeve 7 and the valve core 8, and a lower throttling port J3 communicated with the low-pressure cavity IIC2 and the transition cavity B is arranged on the valve core 8. The sliding sleeve 7 and the diaphragm assembly 6 form a damping cavity D, and a throttling hole for communicating the low-pressure cavity IC1 with the damping cavity D is formed in the sliding sleeve 7.
The diaphragm assembly 6 comprises a spring seat 61, a U-shaped diaphragm 62 and a supporting seat 63, the spring seat 61 is in contact with the adjusting spring 5, the spring seat 61 is connected with the supporting seat 63 through a compression nut 63, one end of the U-shaped diaphragm 62 is arranged between the spring seat 61 and the supporting seat 63, the other end of the U-shaped diaphragm 62 is compressed between the spring cover 4 and the shell 9, a sealing ring 65 is arranged between the spring seat 61 and the U-shaped diaphragm 62, and the supporting seat 63 is connected with the valve core 8.
Working principle of the invention
As shown in figure 1, the valve is in a free state, the adjusting spring is in a non-compression state, and the cylindrical valve core is sealed with the sliding sleeve under the action of the force of the return spring. The loading force of the adjusting spring is adjusted through the manual adjusting nut and the plane bearing, and is transmitted to the cylindrical valve core and the reset spring through the diaphragm assembly, so that the cylindrical valve core moves downwards, the throttling area between the cylindrical valve and the sliding sleeve is changed, and the local resistance of the valve is changed. By changing the throttle area of the part, the flow speed and the kinetic energy of medium particles are changed to cause different pressure drops, thereby achieving and maintaining different pressures at the outlet side. Thereby decompressing the high-pressure medium to the required low pressure to meet the requirements of the system.
As shown in fig. 3, when the throttle area between the cylindrical valve core and the sliding sleeve is adjusted downwards, the high-pressure medium entering from the inlet joint enters the transition cavity from the high-pressure cavity through the middle throttle port to perform the first-stage throttling decompression; the medium in the transition cavity passes through the upper throttling port and the lower throttling port on the two sides of the cylindrical valve core and the sliding sleeve, is subjected to secondary throttling and pressure reduction, enters the low-pressure cavity to reach the required outlet pressure, and enters the lower pipeline system through the outlet connector. Meanwhile, a medium in the low-pressure cavity enters the damping cavity through the throttling hole in the sliding sleeve, acts on the sensitive element diaphragm assembly, feeds back the change of the outlet pressure, and improves the impact resistance of the valve and the stability of the outlet pressure of the low-pressure cavity and the anti-interference capability of the valve due to the existence of the damping cavity.
Features of the invention
a) Throttle design
The throttling part of the pressure reducing valve is columnar, so that the valve clack keeps balance in the horizontal direction and keeps good balance in the vertical direction at the same time, complete balance under medium pressure is realized, the throttling element is not influenced by inlet and outlet pressure fluctuation, and the precision of the pressure reducing valve is improved; meanwhile, the elastic element only corresponds to the outlet pressure of the secondary throttling, so that the stability of the outlet pressure of the pressure reducing valve can be improved, and the design and manufacturing cost is reduced.
The two-stage throttling can be realized, so that the problem of pressure reduction under the condition of high pressure drop is solved, the hydraulic impact is slowed down, the cavitation is avoided, the noise is reduced, and the two-stage throttling can also be suitable for pressure reduction under the condition of low pressure drop.
b) Design of pressure feedback structure (U-shaped diaphragm component)
The U-shaped diaphragm assembly with smaller rigidity and larger stroke is used as a pressure feedback piece, so that the precision of the product can be effectively improved.
c) Damping chamber
The damping cavity structure is designed at the low-pressure cavity, so that the impact of the change of the outlet pressure on a sensitive element (diaphragm) is reduced, the outlet pressure is more stable, the precision is higher, and the anti-interference capability of the valve is improved.
d) Pressure regulating structure design
A plane bearing is added between the adjusting nut and the adjusting spring, so that the pressure adjustment is smooth and accurate; meanwhile, relative rotation between the adjusting spring and the spring seat in the adjusting process is prevented, so that the reliability and the service life of the product are ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides a multistage throttle labyrinth relief pressure valve, includes spring housing (4), casing (9) and lower end cover (12), and the upper end of spring housing (4) is equipped with adjusting nut (1), is equipped with between adjusting nut (1) and case (8) adjusting spring (5), is equipped with reset spring (11), its characterized in that between case (8) and lower end cover (12): the valve core (8) is positioned in the sliding sleeve (7), the sliding sleeve (7) is fixed in the shell (9), the shell (9) forms a high-pressure cavity (A) of an inlet and an outlet, a transition cavity (B) is formed in the valve core (8), the shell (9) and the sliding sleeve (7) form a low-pressure cavity I (C1), a lower end cover (12) and the valve core (8) form a low-pressure cavity II (C2), the sliding sleeve (7) and the valve core (8) are correspondingly provided with an upper throttling port (J2) for communicating the low-pressure cavity I (C1) with the transition cavity (B), the sliding sleeve (7) and the valve core (8) are correspondingly provided with a middle throttling port (J1) for communicating the high-pressure cavity (A) with the transition cavity (B), and the valve core (8) is provided with a lower port (J3) for communicating the low-pressure cavity II (C2) with the transition cavity (B);
an inner convex edge clamped with the diaphragm assembly is arranged on the spring cover;
the diaphragm assembly (6) comprises a spring seat (61), a U-shaped diaphragm (62) and a supporting seat (63), the spring seat (61) is in contact with the adjusting spring (5), the spring seat (61) is connected with the supporting seat (63), one end of the U-shaped diaphragm (62) is arranged between the spring seat (61) and the supporting seat (63), the other end of the U-shaped diaphragm (62) is fixed in the spring cover (4), and the supporting seat (63) is connected with the valve core (8);
a damping cavity (D) is formed in the sliding sleeve (7), and a throttling hole for communicating the low-pressure cavity I (C1) and the damping cavity (D) is formed in the sliding sleeve (7);
adjusting spring (5) is arranged between adjusting nut (1) and diaphragm assembly (6), diaphragm assembly (6) is connected with valve core (8), sliding sleeve (7) and diaphragm assembly (6) form damping cavity (D), and the diaphragm of diaphragm assembly (6) is fixed in spring cover (4).
2. The multi-stage throttling labyrinth pressure reducing valve according to claim 1, characterized in that: the diaphragm of the diaphragm component (6) is arranged between the spring cover (4) and the shell (9).
3. The multi-stage throttling labyrinth pressure reducing valve according to claim 1, characterized in that: the valve core (8) is a cylindrical valve core.
4. The multi-stage throttling labyrinth pressure reducing valve according to claim 1, characterized in that: and a plane bearing (3) is arranged between the adjusting nut (1) and the adjusting spring (5).
5. The multi-stage throttling labyrinth pressure reducing valve according to claim 1, characterized in that: the inlet of the shell (9) is connected with an inlet joint (10), and the outlet of the shell (9) is connected with an outlet joint (13).
6. The multi-stage throttling labyrinth pressure reducing valve according to claim 1, characterized in that: the sliding sleeve (7) is arranged between the spring cover (4) and the shell (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455730.3A CN110131477B (en) | 2019-05-29 | 2019-05-29 | Multistage throttle labyrinth relief pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455730.3A CN110131477B (en) | 2019-05-29 | 2019-05-29 | Multistage throttle labyrinth relief pressure valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110131477A CN110131477A (en) | 2019-08-16 |
| CN110131477B true CN110131477B (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910455730.3A Active CN110131477B (en) | 2019-05-29 | 2019-05-29 | Multistage throttle labyrinth relief pressure valve |
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| CN (1) | CN110131477B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985471A (en) * | 2019-12-25 | 2020-04-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Safe air-proof hole integrated sliding valve |
| CN112682548A (en) * | 2020-11-23 | 2021-04-20 | 河南航天液压气动技术有限公司 | Pressure reducing valve and pressure regulating method thereof |
| CN112524113B (en) * | 2020-11-30 | 2023-04-14 | 重庆红江机械有限责任公司 | Hydraulic pressure stabilizing valve |
| CN113944790B (en) * | 2021-08-26 | 2023-06-06 | 北京宇航系统工程研究所 | High-temperature pressure reducing valve for solid attitude control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0487163A1 (en) * | 1990-11-23 | 1992-05-27 | NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. | Improved pressure reduction valve for gas |
| US5615708A (en) * | 1995-10-23 | 1997-04-01 | Fisher Controls International, Inc. | Flow control valve with non-plugging multi-stage valve trim |
| CN1752498A (en) * | 2005-10-14 | 2006-03-29 | 中国人民解放军总后勤部油料研究所 | Pressure reducing valve and method thereof |
| CN201661740U (en) * | 2010-01-20 | 2010-12-01 | 浙江三方控制阀股份有限公司 | Self-operated internal feedback miniature reducing valve |
| CN104879540A (en) * | 2014-09-24 | 2015-09-02 | 杭州春江阀门有限公司 | Pressure reducing valve with valve closing function |
| CN205136798U (en) * | 2015-11-03 | 2016-04-06 | 天津精通控制仪表技术有限公司 | Multi stage decompression maze cage type adjusting valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020079003A1 (en) * | 2000-10-04 | 2002-06-27 | Scampini Daniel Charles | Straight through flow cage-type valve |
| CN201196280Y (en) * | 2008-05-07 | 2009-02-18 | 常州市科信燃气设备有限公司 | Cutting valve of gas pressure regulator |
-
2019
- 2019-05-29 CN CN201910455730.3A patent/CN110131477B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0487163A1 (en) * | 1990-11-23 | 1992-05-27 | NUOVOPIGNONE INDUSTRIE MECCANICHE E FONDERIA S.p.A. | Improved pressure reduction valve for gas |
| US5615708A (en) * | 1995-10-23 | 1997-04-01 | Fisher Controls International, Inc. | Flow control valve with non-plugging multi-stage valve trim |
| CN1752498A (en) * | 2005-10-14 | 2006-03-29 | 中国人民解放军总后勤部油料研究所 | Pressure reducing valve and method thereof |
| CN201661740U (en) * | 2010-01-20 | 2010-12-01 | 浙江三方控制阀股份有限公司 | Self-operated internal feedback miniature reducing valve |
| CN104879540A (en) * | 2014-09-24 | 2015-09-02 | 杭州春江阀门有限公司 | Pressure reducing valve with valve closing function |
| CN205136798U (en) * | 2015-11-03 | 2016-04-06 | 天津精通控制仪表技术有限公司 | Multi stage decompression maze cage type adjusting valve |
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| CN110131477A (en) | 2019-08-16 |
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