CN221097589U - Self-closing liquid taking valve of liquefied petroleum gas intrinsically safe mechanical linkage - Google Patents
Self-closing liquid taking valve of liquefied petroleum gas intrinsically safe mechanical linkage Download PDFInfo
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- CN221097589U CN221097589U CN202322693949.1U CN202322693949U CN221097589U CN 221097589 U CN221097589 U CN 221097589U CN 202322693949 U CN202322693949 U CN 202322693949U CN 221097589 U CN221097589 U CN 221097589U
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- 239000007788 liquid Substances 0.000 title claims abstract description 29
- 239000003915 liquefied petroleum gas Substances 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 60
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000009471 action Effects 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 5
- 238000009423 ventilation Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000003209 petroleum derivative Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 11
- 238000013461 design Methods 0.000 description 4
- 238000001802 infusion Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The utility model provides a liquefied petroleum gas intrinsic safety mechanical linkage self-closing liquid taking valve, which comprises a valve body, valve body one side is provided with the gas outlet, still including setting up the self-closing mechanism in the valve body, self-closing mechanism includes the mount pad, the movable rod, the elastic component, inlet piece and first sealing member, mount pad and inlet piece are installed on the valve body, movable rod one end movable mounting is on the mount pad, the elastic component suit is on the movable rod, and set up between mount pad and inlet piece, be provided with the air inlet on the inlet piece, air inlet and gas outlet intercommunication, first sealing member sets up the other end at the movable rod. According to the utility model, the self-closing mechanism is arranged on the liquid taking valve, when the pressure difference between the inside and the outside of the valve body is too large, the first sealing element closes the air inlet under the pushing action of the outside pressure, and the air inlet element compresses the elastic element under the pushing action of the outside pressure, so that the liquid taking valve is ensured to be in a sealing state, the leakage of petroleum gas is prevented, the dangerous substances are prevented from leaking to the surrounding environment, and the use safety of the liquid taking valve is improved.
Description
Technical Field
The utility model relates to the technical field of fuel gas supply equipment, in particular to an intrinsic safety mechanical linkage self-closing liquid taking valve for liquefied petroleum gas.
Background
The Chinese patent document No. CN111981322A discloses a pressurized transportation system of liquefied petroleum gas in 11 months and 24 days in 2020, which comprises a plunger pump, wherein a liquid inlet end of the plunger pump is connected with a liquid inlet pipeline leading to a storage tank, and a filter and an inlet stop valve are sequentially connected in series; the liquid outlet end of the plunger pump is connected with a liquid delivery pipeline leading to a downstream user, and is connected with an outlet stop valve and a check valve in series, and the rear end of the liquid delivery pipeline, which is positioned at the installation position of the check valve, is provided with a pressure transmitter; the front end of the infusion pipeline, which is positioned at the installation position of the outlet stop valve, is provided with a pulse damper; a pressure balance pipeline is connected between the air return port of the plunger pump and the storage tank; a safety reflux branch is connected between the liquid inlet pipeline and the infusion pipeline, and a safety reflux valve is connected in series; a flow regulating branch is connected between the infusion pipeline and the storage tank, and a flow regulating valve and a stop valve for flow control are serially connected in front of and behind the infusion pipeline; the liquefied petroleum gas pressurizing and conveying system is characterized in that a stop valve (namely a liquid taking valve) for flow control is arranged between a liquid conveying pipeline and a storage tank and is responsible for controlling the outflow of liquefied petroleum gas in the storage tank, but the stop valve for flow control has the risk of leakage of petroleum gas and has potential safety hazard.
In addition, liquefied Petroleum Gas (LPG) is an important energy source widely used in industry and home, however, intrinsic safety and self-closing leak-free property of a liquid-taking valve have been the key points of research and development due to the special properties of the liquefied petroleum gas.
Therefore, further improvements are needed.
Disclosure of utility model
The utility model aims to provide an intrinsic safety mechanical linkage self-closing liquid taking valve for liquefied petroleum gas, which has the advantages of simple structure, no leakage, safety, reliability and strong practicability, and overcomes the defects in the prior art.
According to this purpose design a liquefied petroleum gas intrinsic safety mechanical linkage self-closing liquid taking valve, including the valve body, valve body one side is provided with gas outlet, its characterized in that: the self-closing mechanism comprises a mounting seat, a movable rod, an elastic piece, an air inlet piece and a first sealing piece, wherein the mounting seat and the air inlet piece are arranged on the valve body; when the pressure difference between the inside and the outside of the valve body is too small, the first sealing element opens the air inlet under the action of the elastic force of the elastic element, when the pressure difference between the inside and the outside of the valve body is too large, the first sealing element closes the air inlet under the pushing action of the outside pressure, and the air inlet element compresses the elastic element under the pushing action of the outside pressure.
The valve body is internally provided with a ventilation cavity which is communicated with the air inlet; the second sealing element contacts with the inner wall of the valve body when the valve rod moves downwards to cut off the ventilation cavity and the air outlet, and is separated from the inner wall of the valve body when the valve rod moves upwards to enable the ventilation cavity to be communicated with the air outlet.
The second sealing element is movably arranged above the self-closing mechanism; after the air inlet is closed, and when the valve rod drives the second sealing element to move downwards, the second sealing element ejects the first sealing element through the movable rod so as to open the air inlet.
The bottom of the valve body is provided with an air inlet cavity, the self-closing mechanism is positioned in the air inlet cavity, one end of the air inlet cavity is communicated with the air inlet through an air inlet piece, and the other end of the air inlet cavity is communicated with the air outlet cavity through a mounting seat.
The valve body is characterized by further comprising a rotating piece arranged outside the valve body, the rotating piece is arranged at the other end of the valve rod, the valve rod is in threaded fit with the valve body, and the valve rod is driven to move up and down in the valve body when the rotating piece rotates.
When the first sealing element opens the air inlet, a gap is reserved between the first sealing element and the air inlet, the gap is communicated with the air inlet, and a medium enters the air inlet through the gap.
The other end of the movable rod passes through the air inlet piece and then is connected with the first sealing piece.
The valve body comprises a valve seat and an upper shell which are connected with each other, the self-closing mechanism and the second sealing piece are arranged in the valve seat, the valve rod penetrates through the upper shell and then stretches into the valve seat, and the air outlet is arranged on the valve seat.
The valve body is made of copper material.
The first seal is made of polytetrafluoroethylene material.
According to the utility model, the self-closing mechanism is arranged on the liquid taking valve, when the flowing speed of fluid is in a normal working range and the pressure difference between the interior and the exterior of the valve body is too small, the first sealing element opens the air inlet under the elastic action of the elastic element, when the flowing speed of fluid is too high and the pressure difference between the interior and the exterior of the valve body is too large, the first sealing element closes the air inlet under the pushing action of the external pressure, and the air inlet element compresses the elastic element under the pushing action of the external pressure, so that the liquid taking valve is ensured to be in a sealing state, the leakage of petroleum gas is prevented, the dangerous substances are prevented from leaking to the surrounding environment, and the use safety of the liquid taking valve is improved.
Drawings
FIG. 1 is a cross-sectional view of a liquid-taking valve in a state where a self-closing mechanism is cut off in an embodiment of the present utility model.
FIG. 2 is a cross-sectional view of an opened state of a liquid-taking valve according to an embodiment of the present utility model.
FIG. 3 is a cross-sectional view of a liquid-taking valve in a closed state according to an embodiment of the present utility model.
FIG. 4 is a schematic diagram showing the overall structure of a liquid-taking valve according to an embodiment of the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
Referring to fig. 1-4, the intrinsically safe mechanical linkage self-closing liquid taking valve for liquefied petroleum gas comprises a valve body 1, wherein an air outlet 2 is formed in one side of the valve body 1, the self-closing valve further comprises a self-closing mechanism arranged in the valve body 1, the self-closing mechanism comprises a mounting seat 3, a movable rod 4, an elastic piece 5, an air inlet piece 6 and a first sealing piece 7, the elastic piece 5 is a spring, the first sealing piece 7 is a sealing gasket, the mounting seat 3 and the air inlet piece 6 are mounted on the valve body 1, one end of the movable rod 4 is movably mounted on the mounting seat 3, the elastic piece 5 is sleeved on the movable rod 4 and is arranged between the mounting seat 3 and the air inlet piece 6, an air inlet 16 is formed in the air inlet piece 6, the air inlet 16 is communicated with the air outlet 2, and the first sealing piece 7 is arranged at the other end of the movable rod 4.
As shown in fig. 2, the elastic member 5 of the self-closing mechanism adopts the design of a hooke-type material spring, and is used for ensuring that the valve body 1 can automatically keep closed and sealed (overcurrent protection) under the condition that the pressure difference is overlarge due to the too fast flow rate; in this design, the spring is arranged inside the bottom end of the valve body 1, and the spring is used for generating an elastic force to keep the self-closing mechanism at the bottom end of the valve body 1 in an open state; when the flow speed of the fluid is in the normal working range and the pressure difference between the inside and the outside of the valve body 1 is too small, the pressure difference formed by the pressure difference is insufficient to exceed the spring force (Fn >. DELTA.P, the force Fn of the object given by the spring; the pressure difference DeltaP) and is insufficient to compress the spring, the first sealing element 7 opens the air inlet 16 under the action of the elastic force of the elastic element 5 (the elastic force acts on the first sealing element 7 through the movable rod 4), so that the self-closing mechanism is in an open state, and the fluid can enter the valve body 1; as shown in fig. 1, when the flow speed of the fluid is too high and the pressure difference between the interior and the exterior of the valve body 1 is too large, the pressure difference formed by the pressure difference exceeds the spring force (Δp > Fn), the first sealing element 7 closes the air inlet 16 under the pushing action of the external pressure, so that the self-closing mechanism is in a closed state, and the air inlet element 6 compresses the elastic element 5 under the pushing action of the external pressure, so that the liquid taking valve is in a sealed state, and the fluid cannot enter the valve body 1.
Meanwhile, the self-closing mechanism is also a flow limiting device, and the flow rate of the fluid is limited by adjusting the opening degree of the self-closing mechanism; when the pressure inside and outside the valve body 1 is balanced, that is, the internal pressure is equal to the external pressure, the opening degree of the flow restriction device (self-closing mechanism) (that is, the gap 12 between the first sealing member 7 and the air intake member 6) is maximum, and the flow rate can reach the theoretical maximum value; when the internal pressure of the valve body 1 is gradually increased, namely the pressure difference between the inside and the outside is gradually increased, the opening of the flow limiting device is gradually reduced, and the flow rate is correspondingly reduced; when the internal pressure of the valve body 1 is far greater than the external pressure and the pressure difference between the inside and the outside is greater than the spring force, the opening of the flow limiting device gradually becomes smaller until the valve body is closed, and the medium flow is correspondingly smaller until the medium flow becomes zero (when the medium flow becomes zero, the valve body is in a closed state).
The valve body 1 is internally provided with a ventilation cavity 10, and the ventilation cavity 10 is communicated with an air inlet 16; the second sealing member 9 contacts the inner wall of the valve body 1 to shut off the ventilation chamber 10 and the air outlet 2 (as shown in fig. 3) when the valve stem 8 moves downward, and the second sealing member 9 is separated from the inner wall of the valve body 1 to communicate the ventilation chamber 10 and the air outlet 2 (as shown in fig. 2) when the valve stem 8 moves upward.
The second sealing element 9 is movably arranged above the self-closing mechanism; after the air inlet 16 is closed and when the valve rod 8 drives the second sealing element 9 to move downwards, the second sealing element 9 ejects the first sealing element 7 through the movable rod 4 so as to open the air inlet 16; specifically, when the self-closing mechanism is started or the flow limiting device is closed (as shown in fig. 1), the hand wheel is required to be rotated clockwise to close the valve body 1, when the valve body 1 is closed, fluid is cut off, so that pressure difference cannot be formed between the inside and the outside, the second sealing element 9 in the valve body 1 can push the self-closing mechanism (the first sealing element 7) downwards (as shown in fig. 3), and at the moment, the valve body 1 can be started to be used normally by rotating the hand wheel anticlockwise to open the valve body 1 (as shown in fig. 2).
The bottom of the valve body 1 is provided with an air inlet cavity 11, the self-closing mechanism is positioned in the air inlet cavity 11, one end of the air inlet cavity 11 is communicated with an air inlet 16 through an air inlet piece 6, the other end of the air inlet cavity is communicated with an air vent cavity 10 through a mounting seat 3, and the mounting seat 3 is provided with a through hole which is communicated with the air inlet cavity 11 and the air vent cavity 10.
The rotary piece 13 is arranged outside the valve body 1, the rotary piece 13 is arranged at the other end of the valve rod 8, the valve rod 8 is in threaded fit with the valve body 1, the valve rod 8 is driven to move up and down in the valve body 1 when the rotary piece 13 rotates, the rotary piece 13 is a hand wheel, the air inlet 16 and the air outlet 2 form a 90-degree right angle with each other, and a medium enters from bottom to top; when the hand wheel is rotated clockwise as shown in fig. 3, the valve rod 8 drives the second sealing element 9 to move vertically downwards until the second sealing element contacts with the inner wall of the valve body 1, the valve is closed, and the fluid is cut off and cannot flow out; when the hand wheel is rotated anticlockwise as shown in fig. 2, the valve rod 8 drives the second sealing member 9 to move vertically upwards gradually away from the inner wall of the valve body 1, the valve is opened, and fluid can flow out through the air outlet 2.
When the first sealing member 7 opens the air inlet 16, a gap 12 is left between the first sealing member 7 and the air inlet 6, the gap 12 is communicated with the air inlet 16, and a medium enters the air inlet 16 through the gap 12.
The other end of the movable rod 4 passes through the air inlet piece 6 and is connected with the first sealing piece 7.
One end of the valve stem 8 is provided with a valve flap 17 and the second seal 9 is provided on the valve flap 17.
The valve body 1 comprises a valve seat 14 and an upper shell 15 which are connected with each other, the self-closing mechanism and the second sealing piece 9 are arranged in the valve seat 14, the valve rod 8 penetrates through the upper shell 15 and then stretches into the valve seat 14, the air outlet 2 is arranged on the valve seat 14, and the ventilation cavity 10 and the air inlet cavity 11 are arranged in the valve seat 14.
The valve body 1 is made of copper material which has good corrosion resistance and high and low temperature resistance so as to cope with the special properties of liquefied petroleum gas; the total length of the valve body 1 is 135mm, the nominal diameter DN20 and the minimum diameter 15.8mm, and a 3/4' NPT screw thread connection mode is adopted.
The first seal 7 is made of polytetrafluoroethylene material.
The liquid taking valve is a key component applied to small storage tank equipment in a rural micro-pipe network, is responsible for controlling the outflow of liquefied petroleum gas in a storage tank, belongs to a part of a small storage tank gas supply system, and is a valve with long service life, high sealing reliability, intrinsic safety and flow control and self-closing protection functions.
When liquid in the storage tank enters the forced gasification pipeline assembly through the liquefied petroleum gas intrinsic safety mechanical linkage self-closing liquid taking valve, the self-closing mechanism can automatically close and cut off liquid outflow through mechanical linkage even if a valve hand wheel is in an open state for safety after the liquid exceeds a set flow rate; when the set flow rate or other parameters are in a safe range, the intrinsic safety valve is in an open state, allows the medium to flow through, and ensures that the system operates in the safe range by sensing and monitoring medium-critical parameters of the fluid, such as pressure or flow rate; when the system parameter is monitored to be in the safety threshold value of the set range, the working mechanism of the intrinsic safety valve is not triggered; when the system parameter is monitored to exceed the safety threshold value in the set range, the working mechanism of the intrinsic safety valve is triggered, the medium is prevented from continuing to flow by the quick closing of the spring, zero leakage is achieved in the closed state, and the dangerous substances are prevented from leaking to the surrounding environment.
In addition, the liquefied petroleum gas intrinsically safe mechanical linkage self-closing liquid taking valve has simple and reliable structure, does not need external energy or a control system, has high reliability and is not easy to fail, so as to reduce the possibility of failure and leakage; the design of closing and opening by a spring is adopted, so that the valve is automatically closed or manually operated to open and close when the flow speed is too high; the sealing structure is precisely designed and machined to ensure a complete seal in the off state.
The foregoing is a preferred embodiment of the utility model showing and describing the general principles, features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing description merely illustrates the principles of the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a liquefied petroleum gas intrinsic safety mechanical linkage self-closing liquid valve, includes valve body (1), and valve body (1) one side is provided with gas outlet (2), its characterized in that: the self-closing mechanism is arranged in the valve body (1), and comprises a mounting seat (3), a movable rod (4), an elastic piece (5), an air inlet piece (6) and a first sealing piece (7), wherein the mounting seat (3) and the air inlet piece (6) are arranged on the valve body (1), one end of the movable rod (4) is movably arranged on the mounting seat (3), the elastic piece (5) is sleeved on the movable rod (4) and is arranged between the mounting seat (3) and the air inlet piece (6), an air inlet (16) is arranged on the air inlet piece (6), the air inlet (16) is communicated with the air outlet (2), and the first sealing piece (7) is arranged at the other end of the movable rod (4); when the pressure difference between the inside and the outside of the valve body (1) is too small, the first sealing piece (7) opens the air inlet (16) under the elastic action of the elastic piece (5), when the pressure difference between the inside and the outside of the valve body (1) is too large, the first sealing piece (7) closes the air inlet (16) under the pushing action of the outside pressure, and the air inlet piece (6) compresses the elastic piece (5) under the pushing action of the outside pressure.
2. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of claim 1, wherein: the valve further comprises a valve rod (8) and a second sealing element (9) which are movably arranged in the valve body (1), the second sealing element (9) is arranged at one end of the valve rod (8), a ventilation cavity (10) is arranged in the valve body (1), and the ventilation cavity (10) is communicated with the air inlet (16); the second sealing piece (9) contacts with the inner wall of the valve body (1) when the valve rod (8) moves downwards so as to cut off the ventilation cavity (10) and the air outlet (2), and the second sealing piece (9) is separated from the inner wall of the valve body (1) when the valve rod (8) moves upwards so as to enable the ventilation cavity (10) to be communicated with the air outlet (2).
3. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of claim 2, wherein: the second sealing piece (9) is movably arranged above the self-closing mechanism; after the air inlet (16) is closed and when the valve rod (8) drives the second sealing piece (9) to move downwards, the second sealing piece (9) ejects the first sealing piece (7) through the movable rod (4) so as to open the air inlet (16).
4. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of claim 2, wherein: the bottom of the valve body (1) is provided with an air inlet cavity (11), the self-closing mechanism is positioned in the air inlet cavity (11), one end of the air inlet cavity (11) is communicated with an air inlet (16) through an air inlet piece (6), and the other end of the air inlet cavity is communicated with an air vent cavity (10) through a mounting seat (3).
5. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of claim 2, wherein: the valve is characterized by further comprising a rotating piece (13) arranged outside the valve body (1), wherein the rotating piece (13) is arranged at the other end of the valve rod (8), the valve rod (8) is in threaded fit with the valve body (1), and the valve rod (8) is driven to move up and down in the valve body (1) when the rotating piece (13) rotates.
6. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of claim 1, wherein: when the first sealing piece (7) opens the air inlet (16), a gap (12) is reserved between the first sealing piece (7) and the air inlet piece (6), the gap (12) is communicated with the air inlet (16), and a medium enters the air inlet (16) through the gap (12).
7. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of claim 1, wherein: the other end of the movable rod (4) passes through the air inlet piece (6) and is connected with the first sealing piece (7).
8. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of claim 2, wherein: the valve body (1) comprises a valve seat (14) and an upper shell (15) which are connected with each other, the self-closing mechanism and the second sealing piece (9) are arranged in the valve seat (14), the valve rod (8) penetrates through the upper shell (15) and then stretches into the valve seat (14), and the air outlet (2) is arranged on the valve seat (14).
9. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of any one of claims 1-8, wherein: the valve body (1) is made of copper material.
10. The liquefied petroleum gas intrinsically-safe mechanical linkage self-closing liquid-taking valve of any one of claims 1-8, wherein: the first seal (7) is made of polytetrafluoroethylene material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322693949.1U CN221097589U (en) | 2023-10-08 | 2023-10-08 | Self-closing liquid taking valve of liquefied petroleum gas intrinsically safe mechanical linkage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322693949.1U CN221097589U (en) | 2023-10-08 | 2023-10-08 | Self-closing liquid taking valve of liquefied petroleum gas intrinsically safe mechanical linkage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221097589U true CN221097589U (en) | 2024-06-07 |
Family
ID=91318240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322693949.1U Active CN221097589U (en) | 2023-10-08 | 2023-10-08 | Self-closing liquid taking valve of liquefied petroleum gas intrinsically safe mechanical linkage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221097589U (en) |
-
2023
- 2023-10-08 CN CN202322693949.1U patent/CN221097589U/en active Active
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