WO2013170749A1 - 低温绝热气瓶安全阀 - Google Patents

低温绝热气瓶安全阀 Download PDF

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Publication number
WO2013170749A1
WO2013170749A1 PCT/CN2013/075643 CN2013075643W WO2013170749A1 WO 2013170749 A1 WO2013170749 A1 WO 2013170749A1 CN 2013075643 W CN2013075643 W CN 2013075643W WO 2013170749 A1 WO2013170749 A1 WO 2013170749A1
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WO
WIPO (PCT)
Prior art keywords
valve
spring
flap
valve body
adjusting nut
Prior art date
Application number
PCT/CN2013/075643
Other languages
English (en)
French (fr)
Inventor
鲁卫国
王凯鹿
Original Assignee
丹阳市飞轮气体阀门有限公司
Priority date (The priority date 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 date listed.)
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Application filed by 丹阳市飞轮气体阀门有限公司 filed Critical 丹阳市飞轮气体阀门有限公司
Priority to US14/396,059 priority Critical patent/US9464763B2/en
Publication of WO2013170749A1 publication Critical patent/WO2013170749A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • 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
    • 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
    • F16K17/0413—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 in the form of closure plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased
    • Y10T137/7929—Spring coaxial with valve

Definitions

  • the utility model relates to the technical field of valve structures, in particular to a low temperature insulated gas cylinder safety valve.
  • the opening pressure changes, if the opening pressure of the safety valve is high, it will cause the pipeline on the low-temperature motor vehicle LNG welding insulated cylinder to rupture, the natural gas will A large number of leaks, there is a serious risk of causing an accident, if the safety valve opening pressure is low, it will cause energy loss.
  • the object of the present invention is to provide a low temperature insulated gas cylinder safety valve.
  • the safety valve is especially suitable for liquefied natural gas welding insulated gas cylinders for vehicles, welded insulated gas cylinders and low temperature pipeline heat conduction pressure relief applications to ensure the safe operation of pressure vessels and pressure pipelines.
  • a low temperature insulated gas cylinder safety valve comprising a valve body, the valve body comprising an intake air flow passage, a valve seat, a slide rail, a valve core and a spring disposed inside the valve body
  • An air inlet connection thread is disposed on an outer wall of the air inlet end, an air outlet end of the valve body is mounted with an adjustment nut, and the adjustment nut is provided with an adjustment nut vent hole, and the spring is mounted on the adjustment nut and has a row
  • a valve assembly is disposed in the valve body cavity below the spring bracket, and the valve assembly is composed of a valve core, a guide ring mounted on the outer wall of the valve core, a positioning steel ball and a valve flap.
  • the spool is provided with a spool vent, and a spring bracket with a vent is disposed on the positioning steel ball, the valve flap is located on the valve seat, and the valve flap is closely matched with the valve seat.
  • valve flap of the present invention is a circular arc-shaped valve flap, and the circular arc-shaped valve flap is closely matched with the valve seat.
  • the guide ring of the present invention is a Teflon guide ring, and two Teflon guide rings are disposed on the outer wall of the valve core.
  • the center of the spring, the spring bracket, the positioning steel ball, the valve core and the valve flap of the present invention are on the same center line.
  • the utility model relates to a liquefied natural gas welding insulated gas cylinder and a welded insulated gas cylinder for a low-temperature motor vehicle, which ensures the safe operation of the liquefied natural gas welding insulated gas cylinder and the welded thermal insulation gas cylinder for the low-temperature motor vehicle, and effectively reduces the possibility of occurrence of a malignant accident.
  • the utility model has the advantages of stability, repeatability and sealing performance of the discharge pressure (opening pressure) and the returning pressure (closing pressure), and plays a role of pressure protection to improve the liquefied natural gas welding insulated gas cylinder and the welding heat insulating gas for the motor vehicle.
  • the safety of the bottle, the safety valve structure is tight, not easy to damage, and the safety is high.
  • the safety valve is provided with a guiding mechanism of the moving part, that is, the safety valve has two tetrafluoroethylene guiding rings added on the outer surface of the valve core, thereby reducing the valve core and the slide rail. The friction between the two also ensures the temperature factor of thermal expansion and contraction.
  • the safety valve is provided with a central positioning mechanism of the moving part, that is, the safety valve is provided with a spring bracket and a positioning steel ball in the valve core thereof, and the spring, the spring bracket, the positioning steel ball, the valve core,
  • the center of the valve flap is on the same centerline, which acts as the center of the valve flap and the valve seat.
  • the utility model can solve the defects of the existing safety valve, and in order to ensure the reliability and sealing performance of the safety valve, the guiding mechanism of the moving component is set, and in order to ensure the stability and repeatability of the safety valve action, the central positioning of the moving component is set.
  • the organization has played an overpressure safety protection function to avoid major accidents and solve the problem of energy waste.
  • the improvement of the guiding mechanism and the design of the central positioning mechanism make the structure reasonable and the safety performance high.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
  • a low temperature insulated gas cylinder safety valve includes a valve body 1 including an intake air passage 3 disposed therein. , the valve seat 4, the slide 6, the valve core 7 and the spring 13, the outer wall of the intake end of the valve body 1 is provided with an inlet connection thread 2, and the outlet end of the valve body 1 is provided with an adjustment nut 14,
  • the adjusting nut 14 is provided with an adjusting nut venting hole 16
  • the spring 13 is mounted between the adjusting nut 14 and the spring bracket 11 with the venting opening 12
  • the valve body cavity below the spring bracket 11 is installed in the valve body cavity
  • the valve assembly is composed of a valve core 7, a Teflon guide ring 8 mounted on the outer wall of the valve core 7, a positioning steel ball 10 and a valve flap 5, and the outer wall of the valve core 7 is provided with two phases A Teflon guide ring 8.
  • the spool 7 is provided with a spool vent 9 , and a spring bracket 11 with a vent 12 is disposed on the positioning ball 10 , the flap 5 is seated on the valve seat 4 , the flap 5 and the valve seat 4 close cooperation.
  • the valve flap 5 of the present invention is a circular arc-shaped valve flap, and the circular arc-shaped valve flap is closely matched with the valve seat 4.
  • the center of the spring 13, the spring bracket 11, the positioning steel ball 10, the valve core 7, and the valve flap 5 of the present invention are on the same center line.
  • the natural gas enters the valve body 1 through the pipeline from the intake runner 3, and when the pressure of the cylinder of the liquefied natural gas welded insulated cylinder of the low temperature vehicle reaches the safety valve opening pressure (discharge pressure), the natural gas pressure pushes the valve flap 5 moving upwards away from the valve seat 4, reaching the opening height of the full opening, at which time the valve flap 5 pushes the valve core 7, the valve core 7 pushes the positioning steel ball 10, the spring bracket 11 at the same central position, and the spring bracket 11 compresses the spring 13,
  • the Teflon guide ring 8 can reduce the friction between the spool 7 and the slide 6, and the natural gas enters the valve body 1 through the intake passage 3, the spool vent hole 9, and the vent hole 12 on the spring bracket 11.
  • the natural gas is discharged through the adjusting nut vent hole 16 to reduce the pressure of the inner cylinder of the low temperature motorized liquefied natural gas welding insulated cylinder.
  • the liner pressure drops to the relief valve closing pressure value (return pressure)
  • the spring 13 pushes the spring bracket 11 at the same center position, the positioning ball 10 and the spool 7, so that the valve flap 5 is restored to the valve seat 4, With the safety valve in the closed position, the gas that seals the bladder is no longer discharged.

Landscapes

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

Abstract

一种低温绝热气瓶安全阀，包括阀体（1），所述阀体包括设置在其内部的进气流道（3）、阀座（4）、滑道（6）、阀芯（7）和弹簧（13），所述阀体（1）的进气端的外壁上设置有进气口连接螺纹（2），所述阀体（1）的出气端安装有调节螺母（14），所述调节螺母（14）上设置有调节螺母排气孔（16），所述弹簧（13）安装在调节螺母（14）与带有排气孔（12）的弹簧支架（11）间，所述弹簧支架（11）下方的阀体内腔内安装有活门组合件，所述活门组合件由阀芯（7）、安装在阀芯（7）外壁上的导向环（8）、定位钢珠（10）和阀瓣（5）组成，所述阀芯（7）上设置有阀芯排气孔（9），带有排气孔（12）的弹簧支架设置在定位钢珠（10）上，所述阀瓣（5）坐落在阀座（4）上，阀瓣（5）与阀座（4）紧密配合。该安全阀排放压力和回座压力的稳定性、重复性、密封性好、结构紧固、不易损坏、安全性高。

Description

低温绝热气瓶安全阀 技术领域
本实用新型涉及阀门结构技术领域，特别是一种低温绝热气瓶安全阀。
 背景技术
目前，随着工业不断发展，出现天然气汽车，其在车体上设置天然气钢瓶，向汽车提供天然气作为能源，瓶装天然气容量小，满足不了汽车长距离运行，而低温机动车用液化天然气焊接绝热气瓶的具有容量大、使用时间长、液体充装快等优点，其缺点为低温机动车用液化天然气焊接绝热气瓶本身存在日蒸发率以及机动车在运行中颠簸容易造成气瓶内胆压力增高，所以安装安全阀，目前的安全阀在开启动作几次后开启压力发生变化，如果安全阀的开启压力偏高会引起低温机动车用液化天然气焊接绝热气瓶上的管路破裂，天然气将会大量泄漏，还会存在酿成事故的严重风险，如果安全阀的开启压力偏低会造成能源的损失。
为了解决上述问题，设计出一种排放压力（开启压力）和回座压力（关闭压力）稳定性、重复性好，而且结构紧固，不易损坏、安全性能好的安全阀成为本领域的研究亮点。
 技术问题
为克服上述同类技术存在的不足，本实用新型的目的是提供一种低温绝热气瓶安全阀。该安全阀特别适用于机动车用液化天然气焊接绝热气瓶、焊接绝热气瓶和低温管道热传导泄压应用，保证压力容器及压力管道的安全运行。
技术解决方案
本实用新型的技术方案是：一种低温绝热气瓶安全阀，包括阀体，所述阀体包括设置在其内部的进气流道、阀座、滑道、阀芯和弹簧，所述阀体的进气端的外壁上设置有进气口连接螺纹，所述阀体的出气端安装有调节螺母，所述调节螺母上设置有调节螺母排气孔，所述弹簧安装在调节螺母与带有排气孔的弹簧支架间，所述弹簧支架下方的阀体内腔内安装有活门组合件，所述活门组合件由阀芯、安装在阀芯外壁上的导向环、定位钢珠和阀瓣组成，所述阀芯上设置有阀芯排气孔，带有排气孔的弹簧支架设置在定位钢珠上，所述阀瓣坐落在阀座上，阀瓣与阀座紧密配合。
作为优选技术方案，本实用新型的所述阀瓣为圆弧形阀瓣，所述圆弧形阀瓣与阀座紧密配合。
作为优选技术方案，本实用新型的所述导向环为聚四氟乙烯导向环，所述阀芯外壁上相间设置有两个聚四氟乙烯导向环。
作为优选技术方案，本实用新型的所述弹簧、弹簧支架、定位钢珠、阀芯、阀瓣的中心在同一中心线上。
 有益效果
本实用新型的有益效果是：
本实用新型用于低温机动车用液化天然气焊接绝热气瓶和焊接绝热气瓶，保证低温机动车用液化天然气焊接绝热气瓶和焊接绝热气瓶的安全运行，有效减少恶性事故发生的可能性。
本实用新型其排放压力（开启压力）和回座压力（关闭压力）的稳定性、重复性、密封性非常好，起到压力保护作用，提高机动车用液化天然气焊接绝热气瓶和焊接绝热气瓶的安全性，该安全阀结构紧固，不易损坏，安全性高。
为了确保安全阀动作可靠性和密封性，安全阀设有运动部件的导向机构，即该安全阀在其阀芯外表面增设了2只四氟乙烯导向环，这样可减少阀芯与滑道之间的摩擦力，也确保了热胀冷缩的温度因素。
为了确保安全阀动作的稳定性和重复性，安全阀设置运动部件中心定位机构，即该安全阀在其阀芯内设置了弹簧支架与定位钢珠，且弹簧、弹簧支架、定位钢珠、阀芯、阀瓣的中心在同一中心线上，这样起到阀瓣与阀座的中心定位作用，当阀瓣在阀座上方升启时能确保其面积不变。
本实用新型能解决现用安全阀存在的不足，为了确保安全阀动作可靠性和密封性，设置了运动部件的导向机构，为了确保安全阀动作的稳定性和重复性，设置了运动部件中心定位机构，起到了超压安全保护作用，从而避免重大事故发生，解决能源的浪费问题。导向机构的改进和中心定位机构的设计，使其结构合理，安全性能高。
 附图说明
图1是本实用新型实施例1的结构示意图。
本发明的实施方式
下面结合具体实施例，进一步阐述本实用新型。应理解，这些实施例仅用于说明本实用新型而不用于限制本实用新型的范围。此外应理解，在阅读了本实用新型讲授的内容之后，本领域技术人员可以对本实用新型作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。
参照附图1，提出本实用新型的具体实施例1，如图1所示，一种低温绝热气瓶安全阀，包括阀体1，所述阀体1包括设置在其内部的进气流道3、阀座4、滑道6、阀芯7和弹簧13，所述阀体1的进气端的外壁上设置有进气口连接螺纹2，所述阀体1的出气端安装有调节螺母14，所述调节螺母14上设置有调节螺母排气孔16，所述弹簧13安装在调节螺母14与带有排气孔12的弹簧支架11间，所述弹簧支架11下方的阀体内腔内安装有活门组合件，所述活门组合件由阀芯7、安装在阀芯7外壁上的聚四氟乙烯导向环8、定位钢珠10和阀瓣5组成，所述阀芯7外壁上相间设置有两个聚四氟乙烯导向环8。所述阀芯7上设置有阀芯排气孔9，带有排气孔12的弹簧支架11设置在定位钢珠10上，所述阀瓣5坐落在阀座4上，阀瓣5与阀座4紧密配合。本实用新型的所述阀瓣5为圆弧形阀瓣，所述圆弧形阀瓣与阀座4紧密配合。
本实用新型的所述弹簧13、弹簧支架11、定位钢珠10、阀芯7、阀瓣5的中心在同一中心线上。
本实用新型使用中，天然气通过管道从进气流道3进入阀体1内部，当低温机动车用液化天然气焊接绝热气瓶内胆压力达到安全阀开启压力（排放压力）时，天然气压力推动阀瓣5向上移动离开阀座4，达到全启的开启高度，此时阀瓣5推动阀芯7，阀芯7在同一个中心位置上推动定位钢珠10、弹簧支架11，弹簧支架11压缩弹簧13，聚四氟乙烯导向环8可以减少阀芯7与滑道6之间的摩擦力，天然气通过进气流道3、阀芯排气孔9和弹簧支架11上的排气孔12进入阀体1，最后通过调节螺母排气孔16将天然气排出，降低低温机动车液化天然气焊接绝热气瓶内胆压力。当内胆压力降至安全阀关闭压力值时（回座压力），弹簧13推动在同一中心位置上的弹簧支架11、定位钢珠10和阀芯7，使阀瓣5恢复到阀座4上，使安全阀处于关闭的位置，密封住内胆的气体不再排出。
以上所述仅为本实用新型的优选实施例，并非因此而限制本实用新型的专利范围，凡是利用本实用新型说明书及附图内容所作的等效结构变换，或直接或间接运用在其他相关的技术领域，均同理包括在本实用新型的专利保护范围内。

Claims (4)

  1. 一种低温绝热气瓶安全阀，其特征在于：包括阀体，所述阀体包括设置在其内部的进气流道、阀座、滑道、阀芯和弹簧，所述阀体的进气端的外壁上设置有进气口连接螺纹，所述阀体的出气端安装有调节螺母，所述调节螺母上设置有调节螺母排气孔，所述弹簧安装在调节螺母与带有排气孔的弹簧支架间，所述弹簧支架下方的阀体内腔内安装有活门组合件，所述活门组合件由阀芯、安装在阀芯外壁上的导向环、定位钢珠和阀瓣组成，所述阀芯上设置有阀芯排气孔，带有排气孔的弹簧支架设置在定位钢珠上，所述阀瓣坐落在阀座上，阀瓣与阀座紧密配合。
  2. 根据权利要求1所述的低温绝热气瓶安全阀，其特征在于：所述阀瓣为圆弧形阀瓣，所述圆弧形阀瓣与阀座紧密配合。
  3. 根据权利要求2所述的低温绝热气瓶安全阀，其特征在于：所述导向环为聚四氟乙烯导向环，所述阀芯外壁上相间设置有两个聚四氟乙烯导向环。
  4. 根据权利要求1、2或3所述的低温绝热气瓶安全阀，其特征在于：所述弹簧、弹簧支架、定位钢珠、阀芯、阀瓣的中心在同一中心线上。
PCT/CN2013/075643 2012-05-16 2013-05-15 低温绝热气瓶安全阀 WO2013170749A1 (zh)

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