CN110131477A - A kind of multi-level throttle labyrinth decompression valve - Google Patents
A kind of multi-level throttle labyrinth decompression valve Download PDFInfo
- Publication number
- CN110131477A CN110131477A CN201910455730.3A CN201910455730A CN110131477A CN 110131477 A CN110131477 A CN 110131477A CN 201910455730 A CN201910455730 A CN 201910455730A CN 110131477 A CN110131477 A CN 110131477A
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- China
- Prior art keywords
- spool
- spring
- sliding sleeve
- shell
- low pressure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- 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
-
- 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 present invention proposes a kind of multi-level throttle labyrinth decompression valve, including spring shield, shell and lower cover, the upper end of spring shield is equipped with adjusting nut, adjustment spring is equipped between adjusting nut and spool, reset spring is equipped between spool and lower cover, spool is located in sliding sleeve, sliding sleeve is immobilized in the shell, shell forms the high pressure chest of inlet and outlet, adapter cavity is formed in spool, shell and sliding sleeve form low pressure chamber I, low pressure chamber II is formed in lower cover and spool, the upper restriction for being connected to low pressure chamber I and adapter cavity is correspondingly provided on sliding sleeve and spool, the middle restriction for being connected to high pressure chest and adapter cavity is correspondingly provided on sliding sleeve and spool, spool is equipped with the lower restriction of connection low pressure chamber II and adapter cavity.Advantages of the present invention: pressure adjusts smooth, accurate；Improve the anti-interference ability of valve；Structure is simple, easy to maintenance, and the service life is long；Reduce the cavitation erosion risk of level-one throttling High Pressure Difference；Feedback medium pressure is sensitiveer, and precision is higher.
Description
Technical field
The present invention relates to pressure reducing valves, particularly relate to a kind of multi-level throttle labyrinth decompression valve.
Background technique
Multi-level throttle labyrinth decompression valve is that inlet pressure is down to the outlet of needs by manually adjusting disc spring loading force
Pressure, and, using the energy of medium itself, outlet pressure can be made to automatically keep a certain opposite when inlet pressure and flow are changed
Stationary value.
The pressure reducing valve generally used now is generally level-one throttling, and flap is taper or planar shaped.Under low pressure drop, level-one
The pressure reducing valve of throttling has good using effect, but is easy to produce cavitation erosion under high pressure drop and leads to throttling element premature breakdown.Therefore
It is used in series for two or more pressure reducing valves are commonly used under high pressure drop, to reach exit pressure drop to needing pressure and to stablize
The purpose of operation.But the operating cost of system and the multiple of product failure and unstability are increased in this way.
Summary of the invention
The present invention proposes a kind of multi-level throttle labyrinth decompression valve, and it is excessive in a choke pressure drop to solve existing pressure reducing valve
When, it is also easy to produce the problem of cavitation erosion leads to throttling element premature breakdown.
The technical scheme of the present invention is realized as follows: a kind of multi-level throttle labyrinth decompression valve, including spring shield, shell
And lower cover, the upper end of spring shield are equipped with adjusting nut, adjustment spring, spool and lower cover are equipped between adjusting nut and spool
Between be equipped with reset spring, the spool is located in sliding sleeve, and sliding sleeve is immobilized in the shell, and shell forms the height imported and exported
Chamber is pressed, forms adapter cavity in spool, shell and sliding sleeve form low pressure chamber I, form low pressure chamber II, sliding in lower cover and spool
It covers and is correspondingly provided with the upper restriction for being connected to low pressure chamber I and adapter cavity on spool, be correspondingly provided on sliding sleeve and spool and be connected to height
The middle restriction of chamber and adapter cavity is pressed, spool is equipped with the lower restriction of connection low pressure chamber II and adapter cavity.
Damping cavity is formed in the sliding sleeve, sliding sleeve is equipped with the throttle orifice of connection low pressure chamber I and damping cavity.
Adjustment spring is equipped between the adjusting nut and diaphragm unit, diaphragm unit connect with spool, sliding sleeve and
Diaphragm unit forms damping cavity, and the diaphragm of diaphragm unit is fixed in spring shield.
The diaphragm of the diaphragm unit is located between spring shield and shell.
The diaphragm unit includes that spring base, U-shaped diaphragm and fulcrum bearing, spring base are contacted with adjustment spring, spring base
It is connect with fulcrum bearing, one end of U-shaped diaphragm is located between spring base and fulcrum bearing, and the other end of U-shaped diaphragm is fixed on spring shield
Interior, fulcrum bearing is connect with spool.
The spool is cylindrical valve spool.
Plane bearing is equipped between the adjusting nut and adjustment spring.
The entrance of the shell is connected with inlet union, and the exit of shell is connected with outlet connection.
Described is slidably located between spring shield and shell.
Key point explanation of the invention:
A) increase plane bearing at adjustment spring, smooth when adjusting pressure, noiseless in adjustment process support ring and adjusts bullet
Without opposite sliding between spring, adjusting feel is light, and it is more accurate to adjust pressure；
B) using U-shaped diaphragm unit as pressure feedback element, stroke is bigger, mambrane tension is smaller, outlet pressure variation response
It is sensitiveer；
C) spool uses column structure, and medium is carried out from the high pressure chest of pressure reducing valve input end by restriction among adjusting spool
The adapter cavity for entering adjusting spool after level-one throttling is born above and below since the upper and lower area of the cylindrical space of adapter cavity is identical
Fluid pressure, which is cancelled out each other, reaches balance, therefore orifice size is not influenced by inlet pressure variation；Medium passes through regulating valve again
Enter the low pressure chamber of pressure reducing valve outlet end after the upper and lower throttle orifice two-step throttle of core.The gross area in upper and lower two-step throttle hole and centre
The gross area of level-one restriction is identical, and two-stage choke pressure is close, i.e. the basic mean allocation of the total choke pressure of pressure reducing valve, controls
Flow stream velocity；In addition all circumferential average arrangement of the restriction of upper, middle and lower, eliminates lateral force.
D) damping structure is increased, more reasonable structure is made, improves the impact resistance of valve, makes the more steady of outlet pressure
Fixed, precision is higher, improves the anti-interference ability of valve.
Advantages of the present invention:
A) increase plane bearing transition between adjusting nut and adjustment spring, adjust pressure smooth, accurate；
B) damping cavity is increased in low pressure chamber, improves the impact resistance of valve, makes the more stable of outlet pressure, precision is more
Height improves the anti-interference ability of valve；
C) adjusting pressuring valve core uses column structure, is easier to realize the balance by pressure medium, improves the interference performance of anti-medium pressure,
Structure is simple simultaneously, and easy to maintenance, the service life is long；
D) multi-level throttle is realized in single restricting element, reduces the cavitation erosion risk of level-one throttling High Pressure Difference, while reducing body
Product, reduces cost；
E) pressure feedback is carried out using U-shaped diaphragm, mambrane tension is smaller, and feedback medium pressure is sensitiveer, and precision is higher.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is schematic structural view of the invention.
Fig. 2 is diaphragm component structure diagram of the present invention.
Fig. 3 is pressure regulation throttle schematic diagram of the present invention.
In figure: 1- adjusting nut, 2- locking nut, 3- plane bearing, 4- spring shield, 5- adjustment spring, 6- diaphragm unit,
7- sliding sleeve, 8- spool, 9- shell, 10- inlet union, 11- reset spring, 12- lower cover, 13- outlet connection；61- spring
Seat, 62-U shape diaphragm, 63- clamp nut, 64- fulcrum bearing, 65- sealing ring；A- high pressure chest, B- adapter cavity, C1- low pressure chamber I,
C2- low pressure chamber II, D- damping cavity；Restriction in J1-, the upper restriction of J2-, restriction under J3-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 1 to 3, a kind of multi-level throttle labyrinth decompression valve, including spring shield 4, shell 9, inlet union 10, under
The internal screw thread of end cap 12 and outlet connection 13,4 lower end of spring shield is connect with the external screw thread of 9 upper end of shell, shell 9 and lower cover 12
It is bolted, the import of shell 1 is threadedly coupled with inlet union 10, and the outlet of shell 1 is threadedly coupled with outlet connection 13.
The upper end of spring shield 4 is threadedly coupled with adjusting nut 1, and utilizes locking nut 2 by spring shield 4 and adjusting nut 1
Locking is equipped with plane bearing 3 between adjusting nut 1 and adjustment spring 5, the other end of adjustment spring 5 is contacted with diaphragm unit 6,
Diaphragm unit 6 is connect with spool 8, and spool 8 is located in sliding sleeve 7, and the diaphragm of sliding sleeve 7 and diaphragm unit 6 is pressed on spring
Between cover 4 and shell 9, reset spring 11 is equipped between spool 8 and lower cover 12.
The high pressure chest A of inlet and outlet is formed in shell 9, forms adapter cavity B in spool 8, and shell 9 and sliding sleeve 7 form low pressure
Low pressure chamber IIC2 is formed in chamber IC1, lower cover 12 and spool 8, spool 8 uses column construction, corresponds on sliding sleeve 7 and spool 8
Upper restriction J2 equipped with connection low pressure chamber IC1 and adapter cavity B, be correspondingly provided on sliding sleeve 7 and spool 8 be connected to high pressure chest A with
The middle restriction J1 of adapter cavity B, spool 8 are equipped with the lower restriction J3 of connection low pressure chamber IIC2 and adapter cavity B.Sliding sleeve 7 with
Diaphragm unit 6 forms damping cavity D, and sliding sleeve 7 is equipped with the throttle orifice of connection low pressure chamber IC1 and damping cavity D.
Diaphragm unit 6 includes spring base 61, U-shaped diaphragm 62 and fulcrum bearing 63, and spring base 61 is contacted with adjustment spring 5, bullet
Spring abutment 61 is connect by clamp nut 63 with fulcrum bearing 63, and one end of U-shaped diaphragm 62 is located between spring base 61 and fulcrum bearing 63,
The other end of U-shaped diaphragm 62 is pressed between spring shield 4 and shell 9, and sealing ring is equipped between spring base 61 and U-shaped diaphragm 62
65, fulcrum bearing 63 is connect with spool 8.
Working principle of the present invention
As shown in Figure 1, valve is in free state, adjustment spring is in non-compressed state, and cylindrical valve spool is in return spring force
Under effect, it is sealed with sliding sleeve.By manually adjusting adjusting nut, the load of adjustment spring is adjusted by plane bearing
Power is transmitted to cylindrical valve spool, reset spring by diaphragm unit, moves down cylindrical valve spool, to change cylindrical valve and cunning
The orifice size of dynamic inner room, makes valve local resistance change.By changing the orifice size at position, make the stream of medium particle
Speed and kinetic energy change, and different pressure drops are caused, thus the pressure for reaching and keeping outlet side different.To high-pressure medium
It is decompressed to required low pressure, to meet the needs of system.
As shown in figure 3, when adjusting cylindrical valve spool downwards and sliding the orifice size of inner room, from the height of inlet union entrance
Pressure medium enters adapter cavity by middle restriction from high pressure chest, carries out first order expenditure and pressure；Medium in adapter cavity passes through column
The upper and lower restriction of shape spool and sliding sleeve two sides reaches required outlet into low pressure chamber after carrying out two-step throttle decompression
Pressure, by outlet connection into dirty pipe-line system.The medium in low pressure chamber enters resistance by the throttle orifice on sliding sleeve simultaneously
Buddhist nun's chamber is applied on sensing element diaphragm unit, feeds back the variation of outlet pressure, and the presence of damping cavity improves the anti-of valve
The stability of impact, low pressure chamber outlet pressure improves the anti-interference ability of valve.
The features of the present invention
A) saving design
In the throttling part of pressure reducing valve, use column so that flap keep horizontal direction balance while, in vertical direction
Good balance is kept, the complete equipilibrium by pressure medium is realized, makes shadow of the restricting element not by import and export pressure oscillation
It rings, improves the precision of pressure reducer；Elastic element only corresponds to the outlet pressure of two-step throttle simultaneously, can improve decompression valve outlet pressure
Stability, reduce and design and manufacture cost.
It can be realized two-stage throttling, to depressurize in the case of solving the problems, such as high pressure drop, slow down hydraulic blow, avoid
Cavitation occurs, and reduces noise, the decompression being also adapted in the case of low pressure drop.
B) design (U-shaped diaphragm unit) of pressure feedback structure
, stroke bigger U-shaped diaphragm unit smaller using rigidity can effectively improve the precision of product as pressure feedback part.
C) damping cavity
Damping cavity configuration is devised at low pressure chamber, is reduced impact of the variation of outlet pressure to sensing element (diaphragm), is used
Mouthful pressure it is more stable, precision is higher, improves the anti-interference ability of valve.
D) pressure regulating mechanism designs
Increase plane bearing between adjusting nut and adjustment spring, adjusts pressure smooth, accurate；Adjustment process is prevented simultaneously
Relative rotation between middle adjustment spring and spring base, to guarantee reliability and the service life of product.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of multi-level throttle labyrinth decompression valve, including spring shield (4), shell (9) and lower cover (12), spring shield (4)
Upper end is equipped with adjusting nut (1), and adjustment spring (5), spool (8) and lower cover are equipped between adjusting nut (1) and spool (8)
(12) reset spring (11) are equipped between, it is characterised in that: the spool (8) is located in sliding sleeve (7), and sliding sleeve (7) is solid
It is scheduled in shell (9), shell (9) forms the high pressure chest (A) of inlet and outlet, forms adapter cavity (B) in spool (8), shell (9) and sliding
Move set (7) and form low pressure chamber I(C1), lower cover (12) and spool (8) interior formation low pressure chamber II(C2), sliding sleeve (7) and spool
(8) connection low pressure chamber I(C1 is correspondingly provided on) and adapter cavity (B) upper restriction (J2), sliding sleeve (7) and spool (8) on pair
It should be equipped with the middle restriction (J1) of connection high pressure chest (A) and adapter cavity (B), spool (8) is equipped with connection low pressure chamber II(C2) and
The lower restriction (J3) of adapter cavity (B).
2. the multi-level throttle labyrinth decompression valve according to requiring 1, it is characterised in that: form resistance in the sliding sleeve (7)
Buddhist nun's chamber (D), sliding sleeve (7) be equipped with connection low pressure chamber I(C1) and damping cavity (D) throttle orifice.
3. the multi-level throttle labyrinth decompression valve according to requiring 2, it is characterised in that: the adjusting nut (1) and diaphragm
Adjustment spring (5) are equipped between component (6), diaphragm unit (6) is connect with spool (8), sliding sleeve (7) and diaphragm unit (6) shape
At damping cavity (D), the diaphragm of diaphragm unit (6) is fixed in spring shield (4).
4. the multi-level throttle labyrinth decompression valve according to requiring 3, it is characterised in that: the diaphragm of the diaphragm unit (6) is set
Between spring shield (4) and shell (9).
5. the multi-level throttle labyrinth decompression valve according to requiring 3, it is characterised in that: the diaphragm unit (6) includes bullet
Spring abutment (61), U-shaped diaphragm (62) and fulcrum bearing (63), spring base (61) are contacted with adjustment spring (5), spring base (61) and bearing
Seat (63) connection, one end of U-shaped diaphragm (62) is located between spring base (61) and fulcrum bearing (63), U-shaped diaphragm (62) it is another
End is fixed in spring shield (4), and fulcrum bearing (63) is connect with spool (8).
6. the multi-level throttle labyrinth decompression valve according to requiring 1, it is characterised in that: the spool (8) is cylindrical valve spool.
7. the multi-level throttle labyrinth decompression valve according to requiring 1, it is characterised in that: the adjusting nut (1) and adjusting
Plane bearing (3) are equipped between spring (5).
8. the multi-level throttle labyrinth decompression valve according to requiring 1, it is characterised in that: the entrance of the shell (1) connects
It is connected to inlet union (10), the exit of shell (1) is connected with outlet connection (13).
9. the multi-level throttle labyrinth decompression valve according to requiring 1, it is characterised in that: the sliding sleeve (7) is located at spring
It covers between (4) and 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 true CN110131477A (en) | 2019-08-16 |
| CN110131477B CN110131477B (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910455730.3A Active CN110131477B (en) | 2019-05-29 | 2019-05-29 | Multistage throttle labyrinth relief pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110131477B (en) |
Cited By (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 |
| CN112524113A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Hydraulic pressure stabilizing 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 |
| CN113944790A (en) * | 2021-08-26 | 2022-01-18 | 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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| 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 |
| US20020079003A1 (en) * | 2000-10-04 | 2002-06-27 | Scampini Daniel Charles | Straight through flow cage-type valve |
| 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 |
| 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 |
| 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 |
-
2019
- 2019-05-29 CN CN201910455730.3A patent/CN110131477B/en active Active
Patent Citations (8)
| 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 |
| US20020079003A1 (en) * | 2000-10-04 | 2002-06-27 | Scampini Daniel Charles | Straight through flow cage-type valve |
| 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 |
| 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 |
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| 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 |
Cited By (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 |
| CN112524113A (en) * | 2020-11-30 | 2021-03-19 | 重庆红江机械有限责任公司 | Hydraulic pressure stabilizing valve |
| CN113944790A (en) * | 2021-08-26 | 2022-01-18 | 北京宇航系统工程研究所 | High-temperature pressure reducing valve for solid attitude control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110131477B (en) | 2021-07-23 |
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