CN105927742A - Pressure reducing valve for low-pressure gas - Google Patents
Pressure reducing valve for low-pressure gas Download PDFInfo
- Publication number
- CN105927742A CN105927742A CN201610534198.0A CN201610534198A CN105927742A CN 105927742 A CN105927742 A CN 105927742A CN 201610534198 A CN201610534198 A CN 201610534198A CN 105927742 A CN105927742 A CN 105927742A
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- China
- Prior art keywords
- valve
- cavity
- diaphragm
- spool
- valve body
- 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.)
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/12—Covers for housings
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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
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a pressure reducing valve for a low-pressure gas. The pressure reducing valve comprises a valve body, a valve cover, a valve core, a screw base, a pressure regulating screw rod, compressing springs and a spring base, wherein the valve core is vertically arranged in a mounting cavity; an upper cavity is formed between the top end of the mounting cavity and the valve cover; a diaphragm is arranged between the top surface of the upper cavity and the valve cover; a cavity is formed in the valve cover; the pressure regulating screw rod is in threaded connection with the top end of the cavity; the compressing springs are arranged in the cavity; a lower cavity is formed between the lower end of the valve core and the valve body; a middle cavity is formed between the upper end of the valve core and the valve body; the spring base is mounted on the valve core in a sleeving manner; the screw base is arranged between the upper cavity and the middle cavity; a through hole through which the upper cavity and the middle cavity communicate is formed in the screw base; the upper end of the valve core penetrates through the through hole to lean against the lower side surface of the diaphragm. The pressure reducing valve for the low-pressure gas disclosed by the invention adopts a film type structure, and adopts a rubber sealing manner, so that compressing amount and rubber hardness at low-pressure sealing position can be correspondingly designed; the diaphragm sealing adopts ball sealing, so that the condition that when the valve is maintained, the sealing cannot be realized is avoided.
Description
Technical field
The present invention relates to a kind of pressure-reducing valve, particularly relate to a kind of low-pressure gas pressure-reducing valve.
Background technology
The structure of CNG gas pressure reducer is complicated, and automobile accelerates air demand and requires to set greatly surge chamber, although set surge chamber, and it is a lot of that CNG fuel car expends fuel when climbing and startup, also easily causes fuel supplement not, fixes because valve self designs structure.When diaphragm is rubber, ageing of rubber and diaphragm low temperature, fragility changes greatly, acid and alkali-resistance is strong, frequently, it is low that this results in service life for fine motion of adding diaphragm in decompression process；Additionally its housing structure is complicated, and maintenance and debugging needs professional equipment.
In new clean energy vehicle field, for saving the energy, reduce the discharge of Automobile emission, new hydrogen cell automobile is proposed, require this field valve product to use pressure is high, Hydrogen Energy distance travelled of filling is suitable with regular fuel vehicle driving mileage simultaneously, and this various performance parameters resulting in raw natural gas automobile pressure-reducing valve is the most applicable.
Summary of the invention
The purpose of the present invention is that provides a kind of low-pressure gas pressure-reducing valve to solve the problems referred to above.
The present invention is achieved through the following technical solutions above-mentioned purpose:
nullA kind of low-pressure gas pressure-reducing valve，Including valve body、Valve gap、Spool、Spiral shell seat、Screw press、Compression spring and spring base，It is provided with installation cavity in described valve body，Described spool is vertically arranged in described installation cavity，Described valve gap is arranged on the upper end of described valve body，Upper chamber is formed between top and the described valve gap of described installation cavity，It is provided with diaphragm between end face and the described valve gap of described upper chamber，It is provided with cavity in described valve gap，Described screw press is threadeded with the top of described cavity，Described compression spring is arranged in described cavity，The two ends of described compression spring are fixing with the lower end of the upper side of described diaphragm and described screw press respectively to be connected，It is provided with lower chambers between lower end and the described valve body of described spool，It is provided with middle chamber between upper end and the described valve body of described spool，Described spring socket sleeve is contained on described spool，And its two ends bear against the lower end in the upper end of described spool Yu described installation cavity，Described spiral shell seat is arranged between described upper chamber with described middle chamber and fixes with described valve body and is connected，The described upper chamber of connection and the through hole of described middle chamber it is provided with in described spiral shell seat，The upper end of described spool is resisted against described diaphragm downside through described through hole，The top of described spool is resisted against the lower end of the through hole of described spiral shell seat，The through hole connected with described lower chambers it is provided with in the middle part of described spool，Air inlet and gas outlet it is provided with on described valve body，Described air inlet connects with described middle chamber，Described gas outlet connects with described upper chamber.
Specifically, it is provided with upper spring seat between upper end and the lower end of described screw press of described compression spring, it is provided with lower spring cup between lower end and the described diaphragm of described compression spring, described diaphragm is arranged between described valve body and described valve gap by described diaphragm frame, is provided with O type spring washer between described diaphragm and described lower spring cup.
Specifically, between upper end and the described diaphragm of described spiral shell seat, it is provided with gap, between lower end and the upper end of described spool of described spiral shell seat, is provided with sealing ring, between lower end and the described lower chambers of described spring base, be provided with dust ring.
Further, described pressure-reducing valve also includes screw plug, and described valve body is provided with the steam vent connected with described upper chamber, and described screw plug is arranged on the outer end of described steam vent.
Further, being set with locking nut between outer end and the described valve gap of described screw press, the outer end of described valve gap is provided with installation nut and pad.
The beneficial effects of the present invention is:
Low-pressure gas pressure-reducing valve of the present invention uses structure to be diaphragm type, the change of pressure-reducing valve outlet pressure is i.e. utilized to control with the relation such as the change of spring force line style, diaphragm compensation, seal and use rubber seal, decrement, rubber hardness at low pressure seal can be carried out corresponding design, diaphragm seal uses spherical sealed, it is to avoid valve maintenance sealing can not sealing problem.
Accompanying drawing explanation
Fig. 1 is the main sectional view of a kind of low-pressure gas pressure-reducing valve of the present invention；
Fig. 2 is the sectional view of a kind of low-pressure gas pressure-reducing valve of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
nullAs depicted in figs. 1 and 2，One low-pressure gas pressure-reducing valve of the present invention，Including valve body 18、Valve gap 20、Spool 12、Spiral shell seat 7、Screw press 1、Screw plug 10、Compression spring 5 and spring base 11，It is provided with installation cavity in valve body 18，Spool 12 is vertically arranged in installation cavity，Valve gap 20 is arranged on the upper end of valve body 18，Upper chamber 13 is formed between top and the valve gap 20 of installation cavity，It is provided with diaphragm 19 between end face and the valve gap 20 of upper chamber 13，It is provided with cavity in valve gap 20，Screw press 1 is threadeded with the top of cavity，Compression spring 5 is arranged in cavity，The two ends of compression spring 5 are fixing with the lower end of the upper side of diaphragm 19 and screw press 1 respectively to be connected，It is provided with lower chambers 16 between lower end and the valve body 18 of spool 12，It is provided with middle chamber 14 between upper end and the valve body 18 of spool 12，Spring base 11 is sleeved on spool 12，And its two ends bear against the lower end of the upper end at spool 12 and installation cavity，Spiral shell seat 7 is arranged between upper chamber 13 with middle chamber 14 and fixes with valve body 18 and is connected，Connection upper chamber 13 and the through hole of middle chamber 14 it is provided with in spiral shell seat 7，The upper end of spool 12 is resisted against diaphragm 19 downside through through hole，The top of spool 12 is resisted against the lower end of the through hole of spiral shell seat 7，The through hole connected with lower chambers 16 it is provided with in the middle part of spool 12，Air inlet 15 and gas outlet 17 it is provided with on valve body 18，Air inlet 15 connects with middle chamber 14，Gas outlet 17 connects with upper chamber 13，The steam vent connected with upper chamber 13 it is provided with on valve body 18，Screw plug 10 is arranged on the outer end of steam vent.
It is provided with upper spring seat 23 between upper end and the lower end of screw press 1 of compression spring 5, it is provided with lower spring cup 21 between lower end and the diaphragm 19 of compression spring 5, diaphragm 19 is arranged between valve body 18 and valve gap 20 by diaphragm frame 22, O type spring washer 6 it is provided with between diaphragm 19 and lower spring cup 21, it is provided with gap between upper end and the diaphragm 19 of spiral shell seat 7, it is provided with sealing ring 8 between lower end and the upper end of spool 12 of spiral shell seat 7, it is provided with dust ring 9 between lower end and the lower chambers 16 of spring base 11, it is set with locking nut 2 between outer end and the valve gap 20 of screw press 1, the outer end of valve gap 20 is provided with installation nut 3 and pad 4.
The operation principle of the present invention a kind of low-pressure gas pressure-reducing valve is as follows:
After pressure is adjusted, spool 12 under the effect of spring force, is allowed to maintain a gap with the conical surface of sealing ring 8 all the time.Gas is through air inlet 15, by the inclined hole between air inlet 15 and middle chamber 14, enters middle chamber 14 at spool 12, rapidly enters spool 12 and sealing ring 8 conical surface gap, be flowed into upper chamber 13；Meanwhile, lower chambers 16 is entered into further through the through hole on spool 12, at this moment, gas acts on diaphragm 19 and compression spring 5 at upper chamber 13 pressure, gas is under lower chambers 16 acts on the effect of the frictional force on spool 12, between spool 12 body and lumen, and the pressure balance making the upper chamber 13 of pressure-reducing valve is stable.Meet stablizing of outlet pressure.That is the change of inlet pressure can not affect the change of outlet pressure.I.e. it is arranged on the outlet pressure change of high-pressure pressure-reducing valve in Hydrogen Fuel-cell Vehicles, does not affect the change of pressure-reducing valve outlet pressure, keep upper chamber 13 pressure constant.Thus ensure that pressure-reducing valve outlet pressure is basicly stable.In order to ensure the stability of valve, increase dust ring 9 in the bottom of spool 12, and have spiracle on valve gap 20.
Technical scheme is not limited to the restriction of above-mentioned specific embodiment, and every technology deformation made according to technical scheme, within each falling within protection scope of the present invention.
Claims (5)
- null1. a low-pressure gas pressure-reducing valve，It is characterized in that: include valve body、Valve gap、Spool、Spiral shell seat、Screw press、Compression spring and spring base，It is provided with installation cavity in described valve body，Described spool is vertically arranged in described installation cavity，Described valve gap is arranged on the upper end of described valve body，Upper chamber is formed between top and the described valve gap of described installation cavity，It is provided with diaphragm between end face and the described valve gap of described upper chamber，It is provided with cavity in described valve gap，Described screw press is threadeded with the top of described cavity，Described compression spring is arranged in described cavity，The two ends of described compression spring are fixing with the lower end of the upper side of described diaphragm and described screw press respectively to be connected，It is provided with lower chambers between lower end and the described valve body of described spool，It is provided with middle chamber between upper end and the described valve body of described spool，Described spring socket sleeve is contained on described spool，And its two ends bear against the lower end in the upper end of described spool Yu described installation cavity，Described spiral shell seat is arranged between described upper chamber with described middle chamber and fixes with described valve body and is connected，The described upper chamber of connection and the through hole of described middle chamber it is provided with in described spiral shell seat，The upper end of described spool is resisted against described diaphragm downside through described through hole，The top of described spool is resisted against the lower end of the through hole of described spiral shell seat，The through hole connected with described lower chambers it is provided with in the middle part of described spool，Air inlet and gas outlet it is provided with on described valve body，Described air inlet connects with described middle chamber，Described gas outlet connects with described upper chamber.
- A kind of low-pressure gas pressure-reducing valve the most according to claim 1, it is characterized in that: between upper end and the lower end of described screw press of described compression spring, be provided with upper spring seat, it is provided with lower spring cup between lower end and the described diaphragm of described compression spring, described diaphragm is arranged between described valve body and described valve gap by described diaphragm frame, is provided with O type spring washer between described diaphragm and described lower spring cup.
- A kind of low-pressure gas pressure-reducing valve the most according to claim 1, it is characterized in that: between upper end and the described diaphragm of described spiral shell seat, be provided with gap, it is provided with sealing ring between lower end and the upper end of described spool of described spiral shell seat, between lower end and the described lower chambers of described spring base, is provided with dust ring.
- A kind of low-pressure gas pressure-reducing valve the most according to claim 1, it is characterised in that: also including screw plug, described valve body is provided with the steam vent connected with described upper chamber, described screw plug is arranged on the outer end of described steam vent.
- A kind of low-pressure gas pressure-reducing valve the most according to claim 1, it is characterised in that: being set with locking nut between outer end and the described valve gap of described screw press, the outer end of described valve gap is provided with installation nut and pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610534198.0A CN105927742B (en) | 2016-07-08 | 2016-07-08 | A kind of low-pressure gas pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610534198.0A CN105927742B (en) | 2016-07-08 | 2016-07-08 | A kind of low-pressure gas pressure reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105927742A true CN105927742A (en) | 2016-09-07 |
| CN105927742B CN105927742B (en) | 2018-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610534198.0A Active CN105927742B (en) | 2016-07-08 | 2016-07-08 | A kind of low-pressure gas pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105927742B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140667A (en) * | 2018-11-05 | 2020-05-12 | 上海气立可气动设备有限公司 | Two-section type air inlet and two-section type exhaust structure of electric control proportional valve |
| CN113864463A (en) * | 2021-09-30 | 2021-12-31 | 四川航空工业川西机器有限责任公司 | Air inlet and exhaust combined type air valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818455A (en) * | 2005-12-29 | 2006-08-16 | 周继光 | Air pressure reducer |
| CN203297704U (en) * | 2012-12-31 | 2013-11-20 | 宁波市华益气动工程有限公司 | Reducing valve used for air feeding system of natural gas driven automobile |
| CN203868441U (en) * | 2014-03-05 | 2014-10-08 | 浙江元曜阀业有限公司 | Corrugated pipe pressure-relief valve |
| US20150268672A1 (en) * | 2008-10-28 | 2015-09-24 | GM Global Technology Operations LLC | Pressure regulator for hydrogen storage system |
| CN205278479U (en) * | 2015-11-20 | 2016-06-01 | 重庆山能仪表有限公司 | Formula of relying on oneself fuel pressure regulation valve |
| CN105673900A (en) * | 2016-02-23 | 2016-06-15 | 上海井和海船用阀门有限公司 | Air reducing valve used for ships |
| CN205780945U (en) * | 2016-07-08 | 2016-12-07 | 成都航天烽火精密机电有限公司 | A kind of low-pressure gas air relief valve |
-
2016
- 2016-07-08 CN CN201610534198.0A patent/CN105927742B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818455A (en) * | 2005-12-29 | 2006-08-16 | 周继光 | Air pressure reducer |
| US20150268672A1 (en) * | 2008-10-28 | 2015-09-24 | GM Global Technology Operations LLC | Pressure regulator for hydrogen storage system |
| CN203297704U (en) * | 2012-12-31 | 2013-11-20 | 宁波市华益气动工程有限公司 | Reducing valve used for air feeding system of natural gas driven automobile |
| CN203868441U (en) * | 2014-03-05 | 2014-10-08 | 浙江元曜阀业有限公司 | Corrugated pipe pressure-relief valve |
| CN205278479U (en) * | 2015-11-20 | 2016-06-01 | 重庆山能仪表有限公司 | Formula of relying on oneself fuel pressure regulation valve |
| CN105673900A (en) * | 2016-02-23 | 2016-06-15 | 上海井和海船用阀门有限公司 | Air reducing valve used for ships |
| CN205780945U (en) * | 2016-07-08 | 2016-12-07 | 成都航天烽火精密机电有限公司 | A kind of low-pressure gas air relief valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140667A (en) * | 2018-11-05 | 2020-05-12 | 上海气立可气动设备有限公司 | Two-section type air inlet and two-section type exhaust structure of electric control proportional valve |
| CN111140667B (en) * | 2018-11-05 | 2024-05-24 | 上海气立可气动设备有限公司 | Two-section type air inlet and two-section type air exhaust structure of electric control proportional valve |
| CN113864463A (en) * | 2021-09-30 | 2021-12-31 | 四川航空工业川西机器有限责任公司 | Air inlet and exhaust combined type air valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105927742B (en) | 2018-05-18 |
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