CN117267384A - Overcurrent cut-off valve for liquefied gas tank and liquefied gas tank - Google Patents

Overcurrent cut-off valve for liquefied gas tank and liquefied gas tank Download PDF

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Publication number
CN117267384A
CN117267384A CN202311462030.XA CN202311462030A CN117267384A CN 117267384 A CN117267384 A CN 117267384A CN 202311462030 A CN202311462030 A CN 202311462030A CN 117267384 A CN117267384 A CN 117267384A
Authority
CN
China
Prior art keywords
reset
valve body
sealing
liquefied gas
seal
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
Application number
CN202311462030.XA
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Chinese (zh)
Inventor
王振涛
马忠华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Duotian Valve Co ltd
Original Assignee
Ningbo Duotian Valve Co ltd
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.)
Filing date
Publication date
Application filed by Ningbo Duotian Valve Co ltd filed Critical Ningbo Duotian Valve Co ltd
Priority to CN202311462030.XA priority Critical patent/CN117267384A/en
Publication of CN117267384A publication Critical patent/CN117267384A/en
Pending legal-status Critical Current

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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
    • 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
    • F16K1/14—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 with ball-shaped valve member
    • 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
    • F16K1/30—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 specially adapted for pressure containers
    • 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
    • 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
    • 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

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

The application relates to the valve field of liquefied gas jar, especially relates to an overcurrent trip valve for liquefied gas jar, include: a main valve body, the inside of which is formed with a liquefied gas channel; the air inlet pipe is arranged at the air inlet end of the main valve body and is connected with the air outlet end of the liquefied gas tank, and the pipe wall is provided with an air inlet hole; the plugging bulge is formed in the main valve body; the sealing ball is arranged in the main valve body, is positioned between the air inlet pipe and the blocking protrusion and is used for being matched with the blocking protrusion to seal the liquefied gas channel; the opening and closing assembly is used for opening or closing the liquefied gas channel; and the reset component is positioned at the side end of the main valve body and is used for pushing away the sealing ball attached to the plugging protrusion. When the liquefied gas tank overflows, the overcurrent cut-off valve in the application is matched with the plugging bulge by utilizing the sealing ball to close the liquefied gas channel inside the main valve body, so that the overcurrent cut-off of the valve of the liquefied gas tank is completed, and after the fault is eliminated, the valve is re-opened by the reset component so as to recover the normal use of the overcurrent cut-off valve.

Description

Overcurrent cut-off valve for liquefied gas tank and liquefied gas tank
Technical Field
The application relates to the field of valves of liquefied gas tanks, in particular to an overcurrent stop valve for a liquefied gas tank and the liquefied gas tank.
Background
The liquefied gas tank is a storage tank for storing liquefied gas, has high pressure when the liquefied gas exists in the storage tank, and can cause explosion when the liquefied gas is slightly misoperated, thus belonging to special equipment.
The valve body of the common liquefied gas tank in the market at present mainly is a closed valve, namely a common rotary butterfly valve, when the valve body is used, the valve body needs to be rotated to be opened and closed, if the closed valve or a subsequent pipeline or a user end fails in the use process of the liquefied gas tank, the leakage phenomenon of the liquefied gas tank can be caused, namely the overcurrent phenomenon can occur when the liquefied gas passes through the valve body, but the current closed valve does not have the overcurrent cutting function, the liquefied gas in the liquefied gas tank can continuously flow out, and the public safety is further endangered.
Disclosure of Invention
In order to enable the valve for the liquefied gas tank to have an overcurrent cutoff function, when a closed valve on the liquefied gas tank or a subsequent pipeline breaks down, the liquefied gas tank is prevented from continuously leaking, and the use safety of the liquefied gas tank is improved.
In a first aspect, the application provides an overcurrent cut-off valve for a liquefied gas tank, which adopts the following technical scheme:
an excess flow shutoff valve for a liquefied gas tank, comprising:
a main valve body, the inside of which is formed with a liquefied gas channel;
the air inlet pipe is arranged at the air inlet end of the main valve body, the air outlet end of the air inlet pipe is communicated with the liquefied gas channel, the air inlet end of the air inlet pipe is connected with the air outlet end of the liquefied gas tank, and the pipe wall of the air inlet pipe is provided with an air inlet hole;
the plugging bulge is formed in the main valve body;
the sealing ball is arranged in the main valve body, is positioned between the air inlet pipe and the blocking protrusion and is used for being matched with the blocking protrusion to seal the liquefied gas channel;
the opening and closing assembly is positioned at the top of the main valve body, communicated with the inside of the main valve body and used for opening and closing the liquefied gas channel; and
and the reset assembly is positioned at the side end of the main valve body, is communicated with the inner part of the main valve body and is used for pushing away the sealing ball attached to the plugging protrusion.
Preferably, the sealing ball is a rubber sealing ball, the reset assembly comprises a reset valve body connected with the main valve body, a bottom sealing assembly arranged at the bottom of the reset valve body, a reset spring arranged in the reset valve body, a reset valve rod penetrating through the reset valve body, and a reset pressing sheet arranged in the reset valve body and used for limiting the reset valve rod, the reset spring and the bottom sealing assembly are respectively sleeved on the reset valve rod, and two ends of the reset spring are respectively abutted with the bottom sealing assembly and the reset valve rod.
Preferably, the bottom sealing assembly comprises a bottom sealing ring and a bottom sealing flat gasket, the bottom sealing flat gasket is positioned between the reset spring and the bottom sealing ring, the inner ring of the bottom sealing ring and the inner ring of the bottom sealing flat gasket are in contact sealing with the reset valve rod, and the outer ring of the bottom sealing ring and the outer ring of the bottom sealing flat gasket are in contact sealing with the inner wall of the reset valve body.
Preferably, the reset assembly further comprises a reset sealing assembly sleeved on the reset valve rod, and the reset sealing assembly is positioned between the reset pressing sheet and the reset valve rod.
Preferably, the reset seal assembly comprises a reset seal ring and a reset seal flat pad which are sleeved on the reset valve rod, the reset valve rod is provided with a reset seal groove, the reset seal ring is positioned in the reset seal groove, the reset seal flat pad is positioned between the reset valve rod and the reset pressing sheet, the inner ring of the reset seal ring and the inner ring of the reset seal flat pad are in contact seal with the reset valve rod, and the outer ring of the reset seal ring and the outer ring of the reset seal flat pad are in contact seal with the inner wall of the reset valve body.
Preferably, one end of the reset valve rod, which is far away from the sealing ball, is provided with a reset gland.
Preferably, the reset valve body is perpendicular to the main valve body.
Preferably, the sealing ball is a steel ball, a steel ball sealing assembly is arranged in the main valve body, the steel ball sealing assembly is located between the plugging protrusion and the sealing ball and is attached to the plugging protrusion, the reset valve body is obliquely arranged on the main valve body, and the reset valve body is obliquely arranged towards one side far away from the air inlet pipe.
Preferably, the steel ball sealing assembly comprises a steel ball sealing flat pad attached to the plugging bulge and a steel ball sealing ring sleeved on the steel ball sealing flat pad, wherein the steel ball sealing ring is positioned between the steel ball sealing flat pad and the main valve body, and the inner wall and the outer wall of the steel ball sealing flat pad are respectively in contact sealing with the outer wall of the steel ball sealing flat pad and the inner wall of the main valve body.
In a second aspect, the present application provides a liquefied gas tank, which adopts the following technical scheme:
the liquefied gas tank comprises the overcurrent cut-off valve for the liquefied gas tank.
In summary, the present application includes the following beneficial technical effects:
1. when the liquefied gas tank overflows, the overcurrent cut-off valve in the application is matched with the plugging bulge by utilizing the sealing ball to close the liquefied gas channel inside the main valve body, so that the overcurrent cut-off of the valve of the liquefied gas tank is completed, and after the fault is eliminated, the valve is re-opened by the reset component so as to recover the normal use of the overcurrent cut-off valve.
2. This application is through at reset valve body's internally mounted bottom seal assembly and reset seal assembly to improved reset valve body's sealing performance, when utilizing reset valve rod to promote the sealing ball, reset valve body is difficult for taking place to reveal, and bottom seal assembly and reset seal assembly all are by sealing flat pad and sealing pad two-layer seal constitution, thereby have further improved reset valve body's sealing performance.
3. According to the sealing device, the sealing assembly is arranged in the main valve body, the sealing ball is matched with the sealing assembly to complete sealing of the liquefied gas channel in the main valve body, so that when the liquefied gas tank overflows, the sealing ball cuts off the overflow of the liquefied gas channel, and the overflow cutting performance of the overflow cutting valve and the sealing performance of the main valve body are improved.
Drawings
Fig. 1 is a schematic diagram of the full-section structure of embodiment 1 of the present application.
Fig. 2 is an enlarged schematic view of the portion a in fig. 1.
Fig. 3 is a schematic diagram of the full-section structure of embodiment 2 of the present application.
Reference numerals illustrate: 1. a main valve body; 11. a liquefied gas passage; 12. plugging the bulge; 2. an air inlet pipe; 21. an air inlet hole; 3. a sealing ball; 4. an opening and closing assembly; 41. an on-off switch; 42. an opening and closing plate; 43. opening and closing the block; 44. opening and closing the sealing block; 5. a reset assembly; 51. resetting the valve body; 511. resetting the groove; 52. a bottom seal assembly; 521. a bottom sealing ring; 522. a bottom sealing flat gasket; 53. a return spring; 54. resetting the valve rod; 541. a limit protrusion; 542. resetting the sealing groove; 55. resetting the seal assembly; 551. resetting the sealing ring; 552. resetting the sealing flat gasket; 56. resetting and tabletting; 57. resetting the gland; 6. a steel ball sealing assembly; 61. sealing the steel ball with a flat gasket; 62. and a steel ball sealing ring.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses an overcurrent cut-off valve for a liquefied gas tank.
Example 1:
referring to fig. 1, the overcurrent cutoff valve includes a main valve body 1, an intake pipe 2, a blocking protrusion 12, a sealing ball 3, an opening and closing assembly 4, and a reset assembly 5.
The main valve body 1 is cast, and a liquefied gas channel 11 is formed in the main valve body 1.
One end of the air inlet pipe 2 is fixedly arranged at the air inlet end of the main valve body 1, the other end of the air inlet pipe 2 is fixedly connected with the air outlet pipe of the liquefied gas tank, the air outlet end of the air inlet pipe 2 is communicated with the liquefied gas channel 11, the air inlet end of the air inlet pipe 2 is communicated with the air outlet end of the liquefied gas tank, the air inlet pipe 2 can also be the air outlet pipe of the liquefied gas tank, the main valve body 1 and the air inlet pipe 2 are detachably and fixedly connected, and the detachable and fixedly connected comprises but is not limited to plug-in connection, clamping connection or threaded threads, and in the embodiment, the main valve body 1 and the air inlet pipe 2 are connected through the threaded connection. Air inlet holes 21 are formed in the pipe walls of the two sides of the air outlet of the air inlet pipe 2, wherein the number of the air inlet holes 21 can be a plurality of.
Referring to fig. 1, a blocking protrusion 12 is formed inside a main valve body 1, a through hole for passing liquefied gas is formed in the blocking protrusion 12, and the blocking protrusion 12 and the main valve body 1 are integrally formed.
The sealing ball 3 is placed in the main valve body 1, and the sealing ball 3 is located between the air inlet pipe 2 and the plugging protrusion 12, in this embodiment, the sealing ball 3 is a rubber sealing ball made of rubber, and the sealing ball 3 is used for fitting to the plugging protrusion 12 to complete the sealing of the liquefied gas channel 11. In other embodiments, the sealing ball 3 may also be made of other flexible materials with sealing function.
Referring to fig. 1, the opening and closing assembly 4 includes an opening and closing switch 41, an opening and closing plate 42, an opening and closing block 43 and an opening and closing sealing block 44, the opening and closing switch 41 is rotatably connected to the main valve body 1, the opening and closing switch 41 includes an opening and closing valve rod and an opening and closing valve cover disposed on the opening and closing valve rod, the opening and closing valve rod is rotatably connected to the main valve body 1, a first clamping groove is disposed on the opening and closing valve rod, the opening and closing block 43 is threadably connected to the main valve body 1, the opening and closing block 43 is disposed between the blocking protrusion 12 and the opening and closing switch 41, a second clamping groove is disposed on the opening and closing block 43, the opening and closing plate 42 is disposed between the opening and closing valve rod and the opening and closing block 43, and two ends of the opening and closing plate 42 are disposed in the first clamping groove and the second clamping groove respectively, and a bottom of the opening and closing plate 42 is supported on the opening and closing block 43. The opening and closing sealing block 44 is located between the plugging protrusion 12 and the opening and closing block 43, and the opening and closing sealing block 44 can be abutted against the plugging protrusion 12 so as to seal the liquefied gas channel 11.
When the liquefied gas sealing device is used, the opening and closing switch 41 is screwed, the opening and closing valve rod drives the opening and closing block 43 to rotate through the opening and closing plate 42, then the opening and closing block 43 can extrude the opening and closing sealing block 44, so that the opening and closing sealing block 44 is abutted to the sealing and closing protrusion 12 to seal the liquefied gas channel 11, when the liquefied gas sealing device is opened, the opening and closing valve rod drives the opening and closing block 43 to reverse through the reversing and closing switch 41 through the opening and closing plate 42, the opening and closing block 43 does not extrude the opening and closing sealing block 44 any more and is separated from the opening and closing sealing block 44, the opening and closing sealing block 44 is separated from the sealing and closing protrusion 12 under the action force of liquefied gas, and therefore the liquefied gas channel 11 is opened, and the liquefied gas can enter a pipeline through the liquefied gas channel 11.
Referring to fig. 1 and 2, the reset assembly 5 includes a reset valve body 51, a bottom seal assembly 52, a reset spring 53, a reset valve stem 54, a reset seal assembly 55, a reset pressure tab 56, and a reset pressure cap 57.
The reset valve body 51 is provided at a side end of the main valve body 1, and the reset valve body 51 is integrally connected with the main valve body 1. A reset groove 511 is formed in the reset valve body 51. In the present embodiment, the reset valve body 51 is perpendicular to the main valve body 1.
Referring to fig. 2, the bottom sealing assembly 52 is disposed at the bottom of the inner reset groove 511 of the reset valve body 51 and is disposed near the main valve body 1, the bottom sealing assembly 52 includes a bottom sealing ring 521 and a bottom sealing flat pad 522, the bottom sealing ring 521 is disposed at the bottom of the reset groove 511 of the reset valve body 51, the bottom sealing ring 521 may be an O-ring, and the bottom sealing flat pad 522 is disposed on the bottom sealing flat pad 522.
Referring to fig. 2, the reset spring 53 is disposed inside the reset valve body 51, the reset valve rod 54 is disposed inside the reset valve body 51 in a penetrating manner, the reset valve rod 54 is perpendicular to the main valve body 1, the reset valve rod 54 passes through the reset spring 53 and the bottom sealing assembly 52, that is, the reset spring 53 is sleeved on the reset valve rod 54, the reset spring 53 is disposed between the reset valve rod 54 and the bottom sealing assembly 52, and the bottom sealing ring 521 and the bottom sealing flat pad 522 are sleeved on the reset valve rod 54. The reset valve rod 54 is formed with a limit protrusion 541, and the reset spring 53 is located between the reset valve rod 54 and the bottom seal assembly 52.
When in use, two ends of the reset spring 53 are respectively abutted against the limit protrusion 541 and the bottom sealing flat pad 522 on the reset valve rod 54, and the reset spring 53 is used for providing elastic force for the reset valve rod 54 so that the reset valve rod 54 can be reset in the reset valve body 51. The inner ring of the bottom sealing ring 521 and the inner ring of the bottom sealing flat pad 522 are both in contact seal with the reset valve rod 54, and the outer ring of the bottom sealing ring 521 and the outer ring of the bottom sealing flat pad 522 are both in contact seal with the inner wall of the reset valve body 51.
Referring to fig. 2, the reset seal assembly 55 is mounted on the reset valve rod 54, the reset seal assembly 55 is located on one side of the reset valve rod 54, which is far away from the reset spring 53, of the clothes limiting protrusion 541, the reset seal assembly 55 comprises a reset seal ring 551 and a reset seal flat pad 552, the reset valve rod 54 is provided with a reset seal groove 542, the reset seal ring 551 is sleeved in the reset seal groove 542, the reset seal ring 551 can be an O-type seal ring, and the reset seal flat pad 552 is sleeved on the reset valve rod 54. When in use, the inner ring of the reset sealing ring 551 and the inner ring of the reset sealing flat gasket 552 are in contact sealing with the reset valve rod 54, and the outer ring of the reset sealing ring 551 and the outer ring of the reset sealing flat gasket 552 are in contact sealing with the inner wall of the reset valve body 51.
The reset pressing piece 56 is arranged in the reset valve body 51, the reset pressing piece 56 is sleeved on the reset valve rod 54, a limiting part for limiting the reset pressing piece 56 is formed on the reset valve body 51, and the limiting part limits the reset pressing piece 56.
Referring to fig. 2, a reset gland 57 is mounted and fixed to an end of the reset valve stem 54 remote from the main valve body 1, wherein the reset gland 57 may be threadedly coupled to the reset valve stem 54.
When the overcurrent cutoff valve is used, the reset gland 57 is pressed to enable the reset valve rod 54 to push the sealing ball 3 so as to enable the sealing ball 3 to be separated from the plugging protrusion 12, so that the overcurrent cutoff valve can be used normally, and the reset valve rod 54 pushes the sealing ball 3 away from the plugging protrusion 12 and then resets under the elastic force of the reset spring 53.
Referring to fig. 1 and 2, in the process of using the overcurrent cut-off valve, the liquefied gas channel 11 in the main valve body 1 is opened by screwing the on-off switch 41 of the on-off assembly 4, liquefied gas in the liquefied gas tank enters the liquefied gas channel 11 through the air inlet hole 21 on the air inlet pipe 2 and is then discharged through the blocking boss 12 and the air outlet end of the main valve body 1, when the overcurrent cut-off valve fails, the liquefied gas leaks and overflows, the sealing ball 3 in the main valve body 1 is blown up by the liquefied gas and is propped against the blocking boss 12, the sealing ball 3 seals the liquefied gas channel 11 through contact with the blocking boss 12, so that continuous leakage of the liquefied gas is avoided, and then the liquefied gas channel 11 is sealed by screwing the on-off switch 41 of the on-off assembly 4. After the fault is removed, the reset gland 57 of the reset assembly 5 is pressed to enable the reset valve rod 54 to push the sealing ball 3, so that the sealing ball 3 is separated from the plugging protrusion 12, and the overcurrent cutoff valve can be restored to normal use.
Example 2:
referring to fig. 3, the difference between this embodiment and embodiment 1 is that the sealing ball 3 is a steel ball, and the main valve body 1 is further provided with a steel ball sealing component 6 inside, the steel ball sealing component 6 is located between the plugging protrusion 12 and the sealing ball 3, and the steel ball sealing component 6 is attached to the plugging protrusion 12, and the steel ball sealing component 6 is used to cooperate with the sealing ball 3 to seal the liquefied gas channel.
Specifically, the steel ball sealing assembly 6 includes a steel ball sealing flat pad 61 and a steel ball sealing ring 62, the steel ball sealing ring 62 is attached to the plugging bulge 12, the steel ball sealing flat pad 61 is attached to the plugging bulge 12, the steel ball sealing ring 62 is sleeved on the steel ball sealing flat pad 61, the steel ball sealing ring 62 can be an O-shaped sealing ring, when in use, the outer wall of the steel ball sealing flat pad 61 is in contact sealing with the inner wall of the main valve body 1, the inner wall of the steel ball sealing ring 62 is in contact sealing with the outer wall of the steel ball sealing flat pad 61, and the outer wall of the steel ball sealing ring 62 is in contact sealing with the inner wall of the main valve body 1.
Because the steel ball sealing flat gasket 61 and the steel ball sealing ring 62 are flexible sealing members, in the use process, if the sealing ball 3 is extruded onto the steel ball sealing flat gasket 61, the steel ball sealing flat gasket 61 and the steel ball sealing ring 62 are easily damaged when the sealing ball 3 is pushed by the reset valve rod 54 perpendicular to the main valve body 1, so that the tightness of the steel ball sealing flat gasket 61 and the steel ball sealing ring 62 is affected, in order to solve the technical problem, the reset valve body 51 is obliquely arranged, specifically, the reset valve body 51 is obliquely arranged with the main valve body 1, the reset valve body 51 is obliquely arranged towards one side far away from the air inlet pipe 2, and preferably, the included angle between the reset valve body 51 and the main valve body 1 is 50-80 degrees.
The embodiment of the application also discloses a liquefied gas tank, which comprises the overcurrent cutoff valve for the liquefied gas tank disclosed in the embodiment 1 or the embodiment 2.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. An overcurrent cutoff valve for a liquefied gas tank, comprising:
a main valve body, the inside of which is formed with a liquefied gas channel;
the air inlet pipe is arranged at the air inlet end of the main valve body, the air outlet end of the air inlet pipe is communicated with the liquefied gas channel, the air inlet end of the air inlet pipe is connected with the air outlet end of the liquefied gas tank, and the pipe wall of the air inlet pipe is provided with an air inlet hole;
the plugging bulge is formed in the main valve body;
the sealing ball is arranged in the main valve body, is positioned between the air inlet pipe and the plugging bulge and is used for being matched with the plugging bulge to seal the liquefied gas channel;
the opening and closing assembly is positioned at the top of the main valve body, communicated with the inside of the main valve body and used for opening or closing the liquefied gas channel; and
and the reset assembly is positioned at the side end of the main valve body, is communicated with the inner part of the main valve body and is used for pushing away the sealing ball attached to the plugging protrusion.
2. The overcurrent cutoff valve for the liquefied gas tank as set forth in claim 1, wherein the sealing ball is a rubber sealing ball, the reset assembly comprises a reset valve body connected with the main valve body, a bottom sealing assembly arranged at the bottom of the reset valve body, a reset spring arranged in the reset valve body, a reset valve rod arranged in the reset valve body in a penetrating manner, and a reset pressing sheet arranged in the reset valve body and used for limiting the reset valve rod, the reset spring and the bottom sealing assembly are respectively sleeved on the reset valve rod, and two ends of the reset spring are respectively abutted with the bottom sealing assembly and the reset valve rod.
3. The excess flow shutoff valve for a liquefied gas tank as claimed in claim 2, wherein the bottom sealing assembly comprises a bottom sealing ring and a bottom sealing flat gasket, the bottom sealing flat gasket is positioned between the return spring and the bottom sealing ring, an inner ring of the bottom sealing ring and an inner ring of the bottom sealing flat gasket are both in contact sealing with the return valve rod, and an outer ring of the bottom sealing ring and an outer ring of the bottom sealing flat gasket are both in contact sealing with an inner wall of the return valve body.
4. The excess flow shutoff valve for a liquefied gas tank as claimed in claim 2, wherein the reset assembly further comprises a reset seal assembly sleeved on the reset valve rod, the reset seal assembly being positioned between the reset pressing sheet and the reset valve rod.
5. The overcurrent cutoff valve for the liquefied gas tank as set forth in claim 4, wherein the reset seal assembly comprises a reset seal ring and a reset seal flat pad which are sleeved on the reset valve rod, the reset valve rod is provided with a reset seal groove, the reset seal ring is positioned in the reset seal groove, the reset seal flat pad is positioned between the reset valve rod and the reset pressing piece, the inner ring of the reset seal ring and the inner ring of the reset seal flat pad are both in contact seal with the reset valve rod, and the outer ring of the reset seal ring and the outer ring of the reset seal flat pad are both in contact seal with the inner wall of the reset valve body.
6. The excess flow shutoff valve for a liquefied gas cylinder as claimed in claim 2, wherein a return gland is provided at an end of the return valve rod remote from the sealing ball.
7. An excess flow shutoff valve for a liquefied gas tank as claimed in any one of claims 2 to 6, wherein the return valve body is perpendicular to the main valve body.
8. The excess flow shutoff valve for a liquefied gas tank as claimed in any one of claims 2 to 6, wherein the sealing ball is a steel ball, a steel ball sealing assembly is provided in the main valve body, the steel ball sealing assembly is located between the plugging protrusion and the sealing ball and is attached to the plugging protrusion, the reset valve body is obliquely arranged on the main valve body, and the reset valve body is obliquely arranged towards a side far away from the gas inlet pipe.
9. The excess flow shutoff valve for liquefied gas storage tanks of claim 8 wherein the steel ball sealing assembly comprises a steel ball sealing flat pad attached to the plugging protrusion and a steel ball sealing ring sleeved on the steel ball sealing flat pad, the steel ball sealing ring is positioned between the steel ball sealing flat pad and the main valve body, and the inner wall and the outer wall of the steel ball sealing flat pad are respectively in contact sealing with the outer wall of the steel ball sealing flat pad and the inner wall of the main valve body.
10. A liquefied gas tank comprising an overcurrent cutoff valve for a liquefied gas tank according to any one of claims 1 to 9.
CN202311462030.XA 2023-11-03 2023-11-03 Overcurrent cut-off valve for liquefied gas tank and liquefied gas tank Pending CN117267384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311462030.XA CN117267384A (en) 2023-11-03 2023-11-03 Overcurrent cut-off valve for liquefied gas tank and liquefied gas tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311462030.XA CN117267384A (en) 2023-11-03 2023-11-03 Overcurrent cut-off valve for liquefied gas tank and liquefied gas tank

Publications (1)

Publication Number Publication Date
CN117267384A true CN117267384A (en) 2023-12-22

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Family Applications (1)

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CN202311462030.XA Pending CN117267384A (en) 2023-11-03 2023-11-03 Overcurrent cut-off valve for liquefied gas tank and liquefied gas tank

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