CN111219513A - One-level axial flow pressure reducing valve - Google Patents
One-level axial flow pressure reducing valve Download PDFInfo
- Publication number
- CN111219513A CN111219513A CN202010063589.5A CN202010063589A CN111219513A CN 111219513 A CN111219513 A CN 111219513A CN 202010063589 A CN202010063589 A CN 202010063589A CN 111219513 A CN111219513 A CN 111219513A
- Authority
- CN
- China
- Prior art keywords
- connecting pipe
- piston
- inlet connecting
- pressure reducing
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a primary axial flow pressure reducing valve.A connecting pipe at an inlet is used as a fluid introducing channel and also used as a piston supporting structure; the outlet connecting pipe extends into the valve body to form a piston cylinder body, the piston is arranged in the piston cylinder body, the outlet connecting pipe is not only used as a fluid output pipeline but also used as a piston cylinder body, the valve core is positioned in the piston and arranged at the outlet end of the inlet connecting pipe, the piston is simultaneously used as a valve core and a valve seat, and the number of parts is simplified due to the integrated design of a plurality of structural parts; the low-pressure cavity formed between the outlet connecting pipe and the piston and the outlet connecting pipe are integrally designed, so that the number of parts is reduced, and the structural design is simple; the piston is matched and sealed with a piston cylinder body formed by the inlet connecting pipe and the outlet connecting pipe, so that the valve body is not contacted with fluid and only serves as a structural part without bearing medium pressure; the size of the pressure-bearing part is reduced in design, the pressure-bearing wall thickness of parts is effectively reduced, the overall weight is reduced, and the structural weight of the pressure reducing valve is greatly reduced.
Description
Technical Field
The invention belongs to the field of fluid control, and relates to a pressure reducing valve, in particular to a primary axial flow pressure reducing valve.
Background
In the industries of aerospace, military industry, medicine and the like, stable air source pressure and stable system driving and working state are required to be ensured under the condition of changing working conditions (flow and the like). The control is generally performed using a device driven by the pressure of a fluid such as air instead of electricity. The pressure of the pressurized fluid supplied to the equipment is too high, which can lead to failure, and therefore the pressure is reduced by a pressure reducing valve to make the fluid pressure at the outlet meet the process requirements.
The basic structure of the pressure reducing valve includes a forward acting type, a reverse acting type, a forward unloading type, a reverse unloading type and a pilot type. The existing pressure reducing valve is generally composed of a valve body, a main spring, a main valve core, a valve seat, a piston, an adjusting spring and the like, all the components are independently arranged, in order to ensure local pressure, the area of the piston is generally larger than that of the valve core of the main valve, the valve body is provided with a plurality of assembling parts, all the components are independently arranged, and the space structure is not fully utilized, so that the pressure reducing valve has the defects of complex structure, large weight, large required installation space and the like under the condition of the same flow and pressure design requirements.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a primary axial flow pressure reducing valve which is simple in structure, light in weight and small in required installation space.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a primary axial flow pressure reducing valve comprises a valve body, wherein an inlet connecting pipe, a piston, a valve core and an outlet connecting pipe are sequentially arranged in the valve body;
the inlet connecting pipe extends into the valve body and is arranged between the valve body and the valve body in a sealing mode, the inlet end of the inlet connecting pipe is provided with a plunger connector, a piston is sleeved on the inlet connecting pipe and is matched with the inlet connecting pipe in a sealing mode, an adjusting spring is arranged between the piston and the inlet connecting pipe, the outlet connecting pipe extends into the valve body to form a piston cylinder body, and the piston is arranged in the piston cylinder body; the valve core is positioned in the piston and is arranged at the outlet end of the inlet connecting pipe to be matched with the outlet end to form a sealing or throttling section, the rear end of the valve core is provided with a spring seat, and a return spring is arranged between the valve core and the outlet connecting pipe through the spring seat;
under the combined action of the pressure difference at two sides of the piston and the adjusting spring and the reset spring, the piston moves left and right along with the valve core along with the pressure change, the throttle area at the outlet end of the inlet connecting pipe is adjusted to maintain the state balance of the pressure reducing valve, and the pressure reducing function is realized.
Furthermore, the plunger joint is connected with the inlet connecting pipe through threads, the outer part of the inlet connecting pipe is connected with an adjusting nut arranged in the valve body through threads, and the adjusting spring is arranged between the adjusting nut and the piston.
Furthermore, the outer side of the valve body is provided with a set screw for locking the position of the adjusting nut.
Further, the valve core is of a columnar structure, the columnar structure extends into the piston, and a limiting boss matched with the end part of the piston is arranged outside the columnar structure.
Furthermore, the end face of the valve core matched with the spring seat is a conical surface, and the spring seat is a spherical surface and is provided with a hole in the center.
Further, the adjusting spring is sleeved outside the piston.
Further, sealing rings are arranged between the plunger joint and the matching surface of the inlet connecting pipe, between the matching surface of the inlet connecting pipe and the piston and between the matching surface of the piston and the matching surface of the outlet connecting pipe.
Compared with the prior art, the invention has the following beneficial technical effects:
the inlet connecting pipe extends into the valve body, the piston is sleeved on the inlet connecting pipe and is in sealing fit with the inlet connecting pipe, and the inlet connecting pipe is used as a fluid introducing channel and also used as a piston supporting structure; the outlet connecting pipe extends into the valve body to form a piston cylinder body, the piston is arranged in the piston cylinder body, the outlet connecting pipe is not only used as a fluid output pipeline but also used as a piston cylinder body, the valve core is positioned in the piston and arranged at the outlet end of the inlet connecting pipe, the piston is simultaneously used as a valve core and a valve seat, and the number of parts is simplified due to the integrated design of a plurality of structural parts; the low-pressure cavity formed between the outlet connecting pipe and the piston and the outlet connecting pipe are integrally designed, so that the number of parts is reduced, and the structural design is simple; the piston is matched and sealed with a piston cylinder body formed by the inlet connecting pipe and the outlet connecting pipe, so that the valve body is not contacted with fluid and only serves as a structural member without bearing medium pressure. The size of the pressure-bearing part is reduced in design, the pressure-bearing wall thickness of parts is effectively reduced, the overall weight is reduced, and the structural weight of the pressure reducing valve is greatly reduced.
Furthermore, the plunger joint and the inlet connecting pipe are connected through threads, the outer portion of the inlet connecting pipe is connected with an adjusting nut arranged in the valve body through threads, the inlet connecting pipe is rotated outside the valve body to drive the adjusting nut to move, the compression amount of the adjusting nut on the adjusting spring is controlled through the inlet connecting pipe, and the state of the pressure reducing valve is controlled.
The inlet connecting pipe structure characteristics are repeatedly utilized, the inner space of the adjusting spring is repeatedly utilized, the overall dimension and the structural weight of the whole pressure reducing valve are greatly reduced, axial flow inflow and outflow of the pressure reducing valve are realized, the system installation is facilitated, the compactness of the system is improved, and the installation space is reduced.
Under the combined action of the pressure difference between two sides of the piston and the adjusting spring and the reset spring, the piston moves left and right along with the valve core along with the pressure change, the throttle area of the outlet end of the inlet connecting pipe is adjusted to maintain the state balance of the pressure reducing valve, the high-pressure gas is output in stable pressure after being throttled through the valve port of the pressure reducing valve, and the defects of large weight, multiple parts, complex structure, large required installation space and the like of the conventional pressure reducing valve are overcome.
The adjusting spring is sleeved outside the piston, the middle space of the adjusting spring is fully utilized, the inlet connecting pipe and the valve seat are placed in the middle of the spring, and the structural size of the pressure reducing valve is further reduced.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
1-outlet connection pipe; 2-a return spring; 3-a spring seat; 4-a valve core; 5-a piston; 6-adjusting the spring; 7-inlet connection pipe; 8-adjusting the nut; 9-a valve body; 10-filtering the screen; 11-a sealing ring; 12-set screws; 13-plunger joint.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention thereto.
As shown in fig. 1, the pressure reducing valve of the present invention comprises a valve body 9, wherein an inlet connection pipe 7, a piston 5, a valve core 4 and an outlet connection pipe 1 are sequentially arranged in the valve body 9 from left to right; the inlet connecting pipe 7 extends into the valve body 9 and is arranged between the valve body 9 in a sealing mode, the plunger joint 13 is installed at the inlet end of the inlet connecting pipe 7, the plunger joint 13 and the inlet connecting pipe 7 are connected through threads, a filter screen 10 is arranged between the plunger joint 13 and the inlet connecting pipe 7, and a sealing ring 11 is arranged between the plunger joint 13 and the inlet connecting pipe 7 to achieve gas sealing. The outside of the inlet connecting pipe 7 is connected with an adjusting nut 8 arranged in a valve body 9 through threads, and an adjusting spring 6 is arranged between the adjusting nut 8 and the piston 5.
The piston 5 is sleeved on the inlet connecting pipe 7 and is in sealing fit with the inlet connecting pipe 7, a sealing ring 11 is arranged between matching surfaces of the inlet connecting pipe 7 and the piston 5, an adjusting spring 6 is arranged between the piston 5 and the inlet connecting pipe 7, the outlet connecting pipe 1 extends into the valve body 9 to form a piston cylinder body, the piston 5 is arranged in the piston cylinder body, and the sealing rings 11 are arranged between matching surfaces of the piston 5 and the outlet connecting pipe 5; the valve core 4 is positioned in the piston 5 and is arranged at the outlet end of the inlet connecting pipe 7, the spring seat 3 is arranged at the rear end of the valve core 4, and the return spring 2 is arranged between the valve core 4 and the outlet connecting pipe 1 through the spring seat 3; the valve core 4 is of a columnar structure, the columnar structure extends into the piston 5, and a limiting boss matched with the end part of the piston 5 is arranged outside the columnar structure.
Under the combined action of the pressure difference between two sides of the piston 5, the adjusting spring 6 and the reset spring 2, the piston 5 moves left and right together with the valve core 4 along with the pressure change, the valve core is matched with the inner hole of the piston and the right end face, and the valve core moves along with the piston by utilizing the acting force of the reset spring. The distance between the valve core and the matching surface of the outlet end of the inlet connecting pipe is changed, so that the throttle area is controlled to maintain the state balance of the pressure reducing valve, and the pressure reducing function is realized.
In order to prevent the adjusting nut from loosening and affecting the stability of the pressure reducing valve, a set screw 12 for locking the position of the adjusting nut 8 is arranged outside the valve body 9. The end face of the valve core 4 matched with the spring seat 3 is a conical surface, the spring seat 3 is a spherical surface, the center of the spring seat is provided with a hole, the piston 5, the valve core 4 and the spring seat 3 can move along the axial line of the valve body all the time, and the work is stable and reliable.
The adjusting spring 6 is sleeved outside the piston 5, so that the layout is compact and the space is saved.
During assembly, all parts are sequentially installed from the right end of the valve body 9, and finally the outlet connecting pipe 1 is screwed, so that the assembly is simple and convenient.
The left side in the valve body is provided with a high-pressure air inlet interface, and the right side is provided with a low-pressure air outlet interface. When the upstream is not pressurized, the piston 5 moves to the right side under the action of the adjusting spring 6 until contacting with the outlet connecting pipe 1, at the moment, the piston 5 drives the valve core 4 to move rightwards to be separated from the inlet connecting pipe 7, meanwhile, the reset spring 2 is compressed, and at the moment, the reducing valve is in a full-open state.
After high-pressure gas is introduced upstream, the high-pressure gas enters a high-pressure cavity of the pressure reducing valve formed by an inner cavity of the inlet connecting pipe through the inlet connecting pipe, and the high-pressure gas enters a closed low-pressure cavity formed by the outlet connecting pipe and the piston after being throttled and reduced by the valve core 4 and a valve seat processed on the inlet connecting pipe 7. The low-pressure gas pressure acts on the piston, when the gas pressure in the low-pressure cavity rises gradually and reaches a certain value, the acting force generated by the pressure difference of the left side and the right side of the piston 5 is enough to overcome the acting force of the adjusting spring 6, so that the piston 5 moves leftwards, and meanwhile, the valve core 4 moves leftwards under the action of the reset spring 2, so that the throttling area is reduced, the gas pressure in the low-pressure cavity does not rise any more, the state balance of the pressure reducing valve is reached at the moment, and the. When the downstream flow changes to cause the gas pressure in the low-pressure cavity to fluctuate, the piston moves along with the spring force and the gas pressure, and the throttling area is changed, so that the gas pressure is stabilized in the design range.
Through rotating the inlet connecting pipe, the adjusting nut and the threads on the inlet connecting pipe are in relative transmission, the adjusting nut is controlled to move leftwards or rightwards, the compression amount of the adjusting spring is adjusted, and then the acting force of the adjusting spring on the piston is controlled. Finally, the output low-pressure gas pressure in the low-pressure cavity on the right side of the piston is controlled.
The present invention has been described in detail with reference to the above examples, and it will be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (7)
1. A one-stage axial flow pressure reducing valve is characterized in that: comprises a valve body (9), wherein an inlet connecting pipe (7), a piston (5), a valve core (4) and an outlet connecting pipe (1) are sequentially arranged in the valve body (9);
the inlet connecting pipe (7) extends into the valve body (9) and is arranged between the valve body (9) in a sealing mode, a plunger connector (13) is installed at the inlet end of the inlet connecting pipe (7), a piston (5) is sleeved on the inlet connecting pipe (7) and is matched with the inlet connecting pipe (7) in a sealing mode, an adjusting spring (6) is arranged between the piston (5) and the inlet connecting pipe (7), the outlet connecting pipe (1) extends into the valve body (9) to form a piston cylinder body, and the piston (5) is installed in the piston cylinder body; the valve core (4) is positioned in the piston (5) and is arranged at the outlet end of the inlet connecting pipe (7) to be matched with the outlet end to form a sealing or throttling section, the rear end of the valve core (4) is provided with a spring seat (3), and a return spring (2) is arranged between the valve core (4) and the outlet connecting pipe (1) through the spring seat (3);
under the combined action of the pressure difference at two sides of the piston (5), the adjusting spring (6) and the reset spring (2), the piston (5) moves left and right along with the valve core (4) along with the pressure change, and the throttle area at the outlet end of the inlet connecting pipe (7) is adjusted to maintain the state balance of the pressure reducing valve, so that the pressure reducing function is realized.
2. The primary axial flow pressure reducing valve according to claim 1, wherein: the plunger joint (13) is connected with the inlet connecting pipe (7) through threads, the outer part of the inlet connecting pipe (7) is connected with an adjusting nut (8) arranged in the valve body (9) through threads, and the adjusting spring (6) is arranged between the adjusting nut (8) and the piston (5).
3. The primary axial flow pressure reducing valve according to claim 2, wherein: and a set screw (12) for locking the position of the adjusting nut (8) is arranged on the outer side of the valve body (9).
4. A primary axial flow pressure reducing valve according to claim 1, 2 or 3, wherein: the valve core (4) is of a columnar structure, the columnar structure extends into the piston (5), and a limiting boss matched with the end part of the piston (5) is arranged outside the columnar structure.
5. A primary axial flow pressure reducing valve according to claim 1, 2 or 3, wherein: the end face of the valve core (4) matched with the spring seat (3) is a conical surface, and the spring seat (3) is spherical and is provided with a central hole.
6. A primary axial flow pressure reducing valve according to claim 1, 2 or 3, wherein: the adjusting spring (6) is sleeved outside the piston (5).
7. A primary axial flow pressure reducing valve according to claim 1, 2 or 3, wherein: and sealing rings (11) are arranged between the matching surfaces of the plunger connector (13) and the inlet connecting pipe (7), between the matching surfaces of the inlet connecting pipe (7) and the piston (5) and between the matching surfaces of the piston (5) and the outlet connecting pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010063589.5A CN111219513A (en) | 2020-01-20 | 2020-01-20 | One-level axial flow pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010063589.5A CN111219513A (en) | 2020-01-20 | 2020-01-20 | One-level axial flow pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111219513A true CN111219513A (en) | 2020-06-02 |
Family
ID=70829593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010063589.5A Pending CN111219513A (en) | 2020-01-20 | 2020-01-20 | One-level axial flow pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111219513A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664691A (en) * | 2020-12-28 | 2021-04-16 | 宁波新佳行自动化工业有限公司 | Special multi-station pressure reducing valve for air compressor |
| CN115111414A (en) * | 2022-06-29 | 2022-09-27 | 沈阳航天新光集团有限公司 | High-precision pilot pressure reducer |
| CN115264120A (en) * | 2022-07-22 | 2022-11-01 | 西北核技术研究所 | Two-way valve and damping valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4213021A (en) * | 1979-01-19 | 1980-07-15 | Aeroquip Corporation | Indicating check valve |
| CN103608744A (en) * | 2011-04-20 | 2014-02-26 | 泰思康公司 | In-line back pressure fluid regulator |
| CN105508678A (en) * | 2016-02-18 | 2016-04-20 | 杭州富阳雷讯科技咨询服务有限公司 | Novel pressure reducing valve applied to water purifier |
| CN205918959U (en) * | 2016-06-28 | 2017-02-01 | 河南航天液压气动技术有限公司 | Axial -flow type level pressure relief pressure valve |
| CN108458142A (en) * | 2017-12-22 | 2018-08-28 | 兰州空间技术物理研究所 | A kind of unidirectional relief valve suitable for pressure control in spacecraft module |
-
2020
- 2020-01-20 CN CN202010063589.5A patent/CN111219513A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4213021A (en) * | 1979-01-19 | 1980-07-15 | Aeroquip Corporation | Indicating check valve |
| CN103608744A (en) * | 2011-04-20 | 2014-02-26 | 泰思康公司 | In-line back pressure fluid regulator |
| CN105508678A (en) * | 2016-02-18 | 2016-04-20 | 杭州富阳雷讯科技咨询服务有限公司 | Novel pressure reducing valve applied to water purifier |
| CN205918959U (en) * | 2016-06-28 | 2017-02-01 | 河南航天液压气动技术有限公司 | Axial -flow type level pressure relief pressure valve |
| CN108458142A (en) * | 2017-12-22 | 2018-08-28 | 兰州空间技术物理研究所 | A kind of unidirectional relief valve suitable for pressure control in spacecraft module |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664691A (en) * | 2020-12-28 | 2021-04-16 | 宁波新佳行自动化工业有限公司 | Special multi-station pressure reducing valve for air compressor |
| CN115111414A (en) * | 2022-06-29 | 2022-09-27 | 沈阳航天新光集团有限公司 | High-precision pilot pressure reducer |
| CN115264120A (en) * | 2022-07-22 | 2022-11-01 | 西北核技术研究所 | Two-way valve and damping valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111219513A (en) | One-level axial flow pressure reducing valve | |
| CN101749465A (en) | Double-valve seat pressure-reducing valve | |
| CN109373034B (en) | High-pressure gas pressure reducing valve | |
| CN217866940U (en) | Concentrated phase booster | |
| CN210461828U (en) | Flow differential pressure setting valve | |
| CN215172564U (en) | Ultrahigh pressure reducing valve | |
| CN216588892U (en) | Aircraft engine oil pump case | |
| CN108266413B (en) | Asymmetric electro-hydrostatic actuator based on pressure selection valve | |
| CN115750361A (en) | Axial pressure balancing device | |
| CN210830637U (en) | Safety valve structure for piston type pressure reducer | |
| CN115898703A (en) | Cavitation pipe capable of adjusting flow area and flow area adjusting method thereof | |
| CN211259750U (en) | One-way interface gas circuit replacing device | |
| CN218152529U (en) | Direct-acting plug-in overflow valve capable of adjusting inlet angle in large range | |
| CN117432849A (en) | Small-sized high-pressure unloading type gas pressure reducing valve | |
| CN205013377U (en) | On -vehicle fire pump of adjustable ram pressure | |
| CN221300230U (en) | Two-stage system pressure reducing valve for high-pressure gas | |
| CN114962654A (en) | Check valve component and forced blow-off check valve | |
| CN219221378U (en) | High-reliability overpressure control safety valve | |
| CN109695754A (en) | A kind of hydraulic inlet valve | |
| CN220353990U (en) | Power control valve and hydraulic pump | |
| CN220249024U (en) | Integrated valve block | |
| CN103363280B (en) | A kind of assembling ejector | |
| CN216643182U (en) | Blow-off check valve | |
| CN217951342U (en) | Enhanced ignition control one-way valve | |
| CN211737623U (en) | Micro-flow regulating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200602 |
|
| WD01 | Invention patent application deemed withdrawn after publication |