CN112696514B - LNG (liquefied Natural gas) heat-insulating gas cylinder pressurization and pressure regulation valve for vehicle - Google Patents

LNG (liquefied Natural gas) heat-insulating gas cylinder pressurization and pressure regulation valve for vehicle Download PDF

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Publication number
CN112696514B
CN112696514B CN202011563275.8A CN202011563275A CN112696514B CN 112696514 B CN112696514 B CN 112696514B CN 202011563275 A CN202011563275 A CN 202011563275A CN 112696514 B CN112696514 B CN 112696514B
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China
Prior art keywords
piston
valve
valve body
sealing ring
elastic sealing
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CN202011563275.8A
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CN112696514A (en
Inventor
吴淑民
张伟鹏
罗学武
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Shanghai Figure Cryogenic Valves Co ltd
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Shanghai Figure Cryogenic Valves Co ltd
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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
    • 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
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention provides a pressurization and pressure-regulating valve for an LNG (liquefied natural gas) heat-insulation gas cylinder for a vehicle, which comprises a pressure-regulating valve main body, wherein the pressure-regulating valve main body comprises a valve body, the upper end part of the valve body is a piston body, a piston is arranged in the piston body, the piston moves up and down in the piston body, the lower end of the piston body is inserted into the lower end part of the valve body, the top of the piston body is provided with an opening, and a pressure cap is fixed at the opening of the piston body; the tail end of the piston is connected with a valve clack, the valve clack is positioned at the lower end part of the valve body, two channels are arranged on the valve body, the interior of the valve body is communicated with the exterior through the two channels, and the two channels are arranged at an inclined angle; a first elastic sealing ring is arranged between the piston and the valve body, a nut for blocking the elastic sealing ring is arranged above the first elastic sealing ring, and the nut is fixed on a gasket. The invention can further reduce the volume of the pressure regulating valve by optimizing the structure of the traditional pressure regulating valve, and the gas can enter and exit more easily through the inclined channel. The elastic sealing ring can be better fixed by adding the nut.

Description

LNG (liquefied Natural gas) heat-insulating gas cylinder pressurization and pressure regulation valve for vehicle
Technical Field
The invention relates to the field of valves, in particular to a pressurization and pressure regulation valve for an LNG (liquefied natural gas) heat-insulation gas cylinder for a vehicle.
Background
LNG is an abbreviation for Liquefied Natural Gas, english, liquefied Natural Gas. After the natural gas is purified (to remove impurities such as carbon dioxide, sulfide, heavy hydrocarbon, water and the like), the natural gas is cryogenically cooled to minus 162 ℃ under normal pressure, and the natural gas is changed from a gaseous state to a liquid state, namely liquefied natural gas, wherein the volume of the liquefied natural gas is about 1/620 of the volume of the natural gas with the same mass, and the weight of the liquefied natural gas is about 45 percent of that of water with the same volume.
The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. The safety valve is mainly used in boiler, pressure container and pipeline, and has important protection effect on human body safety and equipment operation.
In the prior art, the LNG pressure regulating valve has a complex structure and is poor in sealing performance and large in size.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a pressurization and pressure regulation valve for an LNG (liquefied natural gas) heat-insulating gas cylinder for a vehicle, which is used for solving at least one technical problem.
The technical scheme of the invention is as follows: the pressurization and pressure regulation valve for the automotive LNG heat insulation gas cylinder comprises a pressure regulation valve body and is characterized in that the pressure regulation valve body comprises a valve body, the upper end part of the valve body is a piston body, a piston is arranged in the piston body, the piston moves up and down in the piston body, the lower end of the piston body is inserted into the lower end part of the valve body, the top of the piston body is provided with an opening, and a pressure cap is fixed at the opening of the piston body;
the tail end of the piston is connected with a valve clack, the valve clack is positioned at the lower end part of the valve body, two channels are formed in the valve body, the interior of the valve body is communicated with the exterior through the two channels, and the two channels are formed in an inclined angle;
a first elastic sealing ring is arranged between the piston and the valve body, a nut for blocking the elastic sealing ring is arranged above the first elastic sealing ring, and the nut is fixed on a gasket.
The invention can further reduce the volume of the pressure regulating valve by optimizing the structure of the traditional pressure regulating valve, and the gas can enter and exit more easily through the inclined channel. The elastic sealing ring can be better fixed by adding the nut, so that the sealing property is ensured.
Preferably, a circular plate body is arranged at the top of the pressing cap, the outer diameter of the plate body is larger than that of the piston body, a cylinder is connected to the lower portion of the circular plate body and extends into the piston body, and the circular plate body is fixed above the opening.
The round plate body can limit the pressure cap.
Preferably, an annular groove is formed in the joint of the cylinder and the circular plate, the opening of the annular groove faces the inner wall of the piston body, and a sealing ring is embedded in the annular groove.
Thereby improving the sealing performance of the pressure cap and the piston body.
Preferably, the cylinder is further provided with a groove with a downward opening, and the top of the piston is provided with a protrusion matched with the groove.
The piston can be limited.
Further preferably, a second elastic sealing ring is arranged at the top of the piston, a retaining ring is arranged above the second elastic sealing ring, and a clamp spring is fixed above the retaining ring.
The invention limits the position of the second elastic sealing ring of the retainer ring and the clamp spring pair.
Preferably, the piston further comprises a piston rod, and a spring is arranged between the piston rod and the piston body.
The invention has the function of guiding the piston through the guide ring.
Further preferably, the guide ring is located below the second elastic sealing ring.
Preferably, the valve body is provided with a piston movement breathing channel, and the piston movement breathing channel is in an inclined state.
The invention can facilitate the gas to enter and exit through the inclined piston movement breathing channel.
Further preferably, the piston movement breathing passage is arranged at the lower end part of the valve body, and an opening of the piston movement breathing passage in the valve body is flush with the gasket.
Preferably, the piston rod end of the piston is provided with a through hole. Facilitating the introduction of gas into the piston chamber.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
fig. 2 is another schematic structural diagram of the present invention.
In the figure: the device comprises a valve body 1, a piston body 2, a piston 3, a pressure cap 4, a valve clack 5, a channel 6, a first elastic sealing ring 7, a nut 8, a gasket 9, a sealing ring 10, a second elastic sealing ring 11, a retainer ring 12, a snap spring 13, a guide ring 14, a spring 15 and a piston movement breathing channel 16.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-2, the pressurization and pressure-regulation valve for the vehicle LNG heat-insulation gas cylinder comprises a pressure-regulation valve body, wherein the pressure-regulation valve body comprises a valve body 1, the upper end part of the valve body is a piston body 2, a piston 3 is arranged in the piston body, the piston moves up and down in the piston body, the lower end of the piston body is inserted into the lower end part of the valve body, the top of the piston body is provided with an opening, and a pressure cap 4 is fixed at the opening of the piston body; the tail end of the piston is connected with a valve clack 5, the valve clack is positioned at the lower end part of the valve body, two channels 6 are arranged on the valve body, the interior of the valve body is communicated with the exterior through the two channels, and the two channels are arranged at an inclined angle; a first elastic sealing ring 7 is arranged between the piston and the valve body, a nut 8 for blocking the elastic sealing ring is arranged above the first elastic sealing ring, and the nut is fixed on a gasket 9.
The invention can further reduce the volume of the pressure regulating valve by optimizing the structure of the traditional pressure regulating valve, and the gas can enter and exit more easily through the inclined channel. The elastic sealing ring can be better fixed by adding the nut, so that the sealing performance is ensured.
Further preferably, the top of the pressing cap is provided with a circular plate body, the outer diameter of the plate body is larger than that of the piston body, a cylinder is connected to the lower portion of the circular plate body and extends into the piston body, and the circular plate body is fixed to the upper portion of the opening. The round plate body can limit the pressing cap.
Preferably, an annular groove is formed at the joint of the cylinder and the circular plate, the opening of the annular groove faces the inner wall of the piston body, and a sealing ring 10 is embedded in the annular groove. Thereby improving the sealing performance of the pressure cap and the piston body.
Further preferably, the cylinder is further provided with a groove with a downward opening, and the top of the piston is provided with a protrusion matched with the groove. The piston can be limited.
Further preferably, a second elastic sealing ring 11 is arranged at the top of the piston, a retainer ring 12 is arranged above the second elastic sealing ring, and a clamp spring 13 is fixed above the retainer ring. The second elastic sealing ring of the retainer ring and the clamp spring pair is limited.
Preferably, the top of the piston is further provided with a groove, the opening direction of the groove faces the inner wall of the piston body, a guide ring 14 is fixed in the groove, the piston further comprises a piston rod, and a spring 15 is arranged between the piston rod and the piston body. The invention has the function of guiding the piston through the guide ring.
Further preferably, the guide ring is located below the second elastic sealing ring.
Preferably, the valve body is provided with a piston movement breathing channel 16, and the piston movement breathing channel is in an inclined state.
The invention can facilitate the gas to enter and exit through the inclined piston movement breathing channel.
Further preferably, the piston movement breathing passage is arranged at the lower end part of the valve body, and an opening of the piston movement breathing passage in the valve body is flush with the gasket.
Preferably, the piston rod end of the piston is provided with a through hole. Facilitating the introduction of gas into the piston chamber.
The foregoing is merely a preferred embodiment of this invention and it should be noted that modifications and adaptations may occur to those skilled in the art without departing from the spirit and scope of the invention and should be considered as within the following claims.

Claims (6)

1. The pressurization and pressure regulation valve for the automotive LNG heat insulation gas cylinder comprises a pressure regulation valve body and is characterized in that the pressure regulation valve body comprises a valve body, the upper end part of the valve body is a piston body, a piston is arranged in the piston body, the piston moves up and down in the piston body, the lower end of the piston body is inserted into the lower end part of the valve body, the top of the piston body is provided with an opening, and a pressure cap is fixed at the opening of the piston body;
the tail end of the piston is connected with a valve clack, the valve clack is positioned at the lower end part of the valve body, two channels are formed in the valve body, the interior of the valve body is communicated with the exterior through the two channels, and the two channels are formed in an inclined angle;
a first elastic sealing ring is arranged between the piston and the valve body, a nut for blocking the elastic sealing ring is arranged above the first elastic sealing ring, the nut is fixed on a gasket, the gasket is connected with the valve body through threads, and the gasket presses the first elastic sealing ring against the valve body;
the top of the piston is provided with a second elastic sealing ring, a check ring is arranged above the second elastic sealing ring, a clamp spring is fixed above the check ring, the piston further comprises a piston rod, a spring is arranged between the piston rod and the piston body, and the spring is connected with the check ring in a matched manner;
the valve body is provided with a piston movement breathing passage, the piston movement breathing passage is in an inclined state, the piston movement breathing passage is inclined downwards from inside to outside, the piston movement breathing passage is arranged at the lower end part of the valve body, and the piston movement breathing passage is positioned at an opening in the valve body and flushed with the gasket.
2. The LNG insulation gas cylinder pressurization and pressure regulation valve for the vehicle as claimed in claim 1, characterized in that: the top of the pressing cap is provided with a circular plate body, the outer diameter of the plate body is larger than that of the piston body, a cylinder is connected to the lower portion of the circular plate body and extends into the piston body, and the circular plate body is fixed to the upper portion of the opening.
3. The LNG insulation gas cylinder pressurization and pressure regulation valve for the vehicle as claimed in claim 2, characterized in that: the connecting part of the cylinder and the circular plate body is provided with an annular groove, the opening of the annular groove faces the inner wall of the piston body, and a sealing ring is embedded in the annular groove.
4. The LNG insulated gas cylinder pressurization and pressure regulation valve for the vehicle as claimed in claim 3, characterized in that: the cylinder is further provided with a groove with a downward opening, and the top of the piston is provided with a bulge matched with the groove.
5. The LNG insulation gas cylinder pressurization and pressure regulation valve for the vehicle as claimed in claim 1, characterized in that: the top of the piston is also provided with a groove, the opening direction of the groove faces the inner wall of the piston body, and a guide ring is fixed in the groove.
6. The LNG insulated gas cylinder pressurization and pressure regulating valve for vehicles of claim 5, characterized in that: the guide ring is located below the second elastic sealing ring.
CN202011563275.8A 2020-12-25 2020-12-25 LNG (liquefied Natural gas) heat-insulating gas cylinder pressurization and pressure regulation valve for vehicle Active CN112696514B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011563275.8A CN112696514B (en) 2020-12-25 2020-12-25 LNG (liquefied Natural gas) heat-insulating gas cylinder pressurization and pressure regulation valve for vehicle

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Application Number Priority Date Filing Date Title
CN202011563275.8A CN112696514B (en) 2020-12-25 2020-12-25 LNG (liquefied Natural gas) heat-insulating gas cylinder pressurization and pressure regulation valve for vehicle

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CN112696514A CN112696514A (en) 2021-04-23
CN112696514B true CN112696514B (en) 2023-03-28

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* Cited by examiner, † Cited by third party
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CN1526983A (en) * 2003-03-08 2004-09-08 钮静江 Bottle valve for air respirator
US7694355B2 (en) * 2006-03-03 2010-04-13 Globe Union Industrial Corp. (Guic) Pressure vessel
CN201196270Y (en) * 2008-05-23 2009-02-18 丛爱国 Liquefied gas steel cylinder valve
JP5551037B2 (en) * 2010-09-28 2014-07-16 株式会社ディーゼルユナイテッド Gas injection valve
CN202251231U (en) * 2011-09-08 2012-05-30 江阴市长龄机械制造有限公司 Hydraulic cylinder end cover
CN202580056U (en) * 2012-04-10 2012-12-05 浙江联大阀门有限公司 Flange type hard sealing butterfly valve with flexible operation
CN204025797U (en) * 2014-08-11 2014-12-17 宁波市鄞州锦融电子有限公司 Reduction valve
CN204114274U (en) * 2014-08-28 2015-01-21 上海百图低温阀门有限公司 Fire-retardant control valve
CN204573230U (en) * 2015-03-06 2015-08-19 江西荣和特种消防设备制造有限公司 A kind of piston type decompression constant-voltage equipment
CN207145702U (en) * 2017-08-30 2018-03-27 湖北三江航天红峰控制有限公司 A kind of natural gas pneumatic stopping valve
CN110195667A (en) * 2019-04-29 2019-09-03 英嘉动力科技无锡有限公司 A kind of novel supercharger system
CN211715898U (en) * 2020-01-20 2020-10-20 弗瑞斯阀门(宁波)有限公司 Valve core of balance valve
CN211952249U (en) * 2020-04-09 2020-11-17 宁波三安制阀有限公司 Pressure reducing sealing device

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