CN112066049A - Valve inside of explosion-proof tyre - Google Patents
Valve inside of explosion-proof tyre Download PDFInfo
- Publication number
- CN112066049A CN112066049A CN202011062313.1A CN202011062313A CN112066049A CN 112066049 A CN112066049 A CN 112066049A CN 202011062313 A CN202011062313 A CN 202011062313A CN 112066049 A CN112066049 A CN 112066049A
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- core
- pressure relief
- shaft sleeve
- core rod
- sealing gasket
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- 238000007789 sealing Methods 0.000 claims abstract description 79
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/20—Check valves specially designed for inflatable bodies, e.g. tyres
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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
- F16K17/02—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
- F16K17/06—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 with special arrangements for adjusting the opening pressure
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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
- F16K25/00—Details relating to contact between valve members and seats
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses an explosion-proof tire valve inside, which comprises a core rod and a shaft sleeve, wherein a through hole is formed in the shaft sleeve; the shaft sleeve is connected to one end of the core rod; one end of the core bar, which is connected with the shaft sleeve, is provided with an air leakage channel; a mandrel is arranged in the through hole of the shaft sleeve; a pressure relief spring is arranged between the mandrel and the core rod; the core shaft is provided with a pressure relief sealing gasket, and the pressure relief sealing gasket and the core shaft jointly seal the opening part of the through hole of the shaft sleeve, which is close to the core shaft; the invention can improve the strength of the core bar and prolong the service life of the valve core; the sealing gasket can be effectively prevented from being adhered, the air escape channel is ensured to be normally opened, the tire burst phenomenon caused by abnormal pressure relief is avoided, and the running safety of the vehicle is improved; the pressure relief pressure can be conveniently adjusted, the structure is simple, and the operation is easy; can improve the sealing performance and effectively avoid the air leakage phenomenon.
Description
Technical Field
The invention relates to an explosion-proof tire valve inside, and belongs to the technical field of tire inflation and deflation.
Background
The tire is an important part of vehicles such as vehicles and the like, the safety performance of the tire is directly influenced, and the tire inner tube is used as a main component for ensuring the safety performance of the vehicles, and the requirements on the sealing performance and the performance state of the valve core are higher and higher. Due to the relationship between the road environment and the temperature change, the vehicle tire is prone to tire burst caused by increased pressure, and the tire burst is very dangerous in the case of high-speed running, so various anti-explosion valve core structures are developed along with the continuous development of the technology.
For example, US5029604 discloses a safety core for a tire valve, which has the following problems in practical use:
1. the safety core of the tire valve disclosed in the U.S. patent has the advantages that the strength of the core rod is low, the core rod is easy to deform and even break, and the spring of the safety core of the tire valve is arranged in the core rod, so that the size of the inner cavity of the core rod is increased, and the strength of the core rod is reduced.
2. When the temperature of the tire rises, the pressure relief port is easy to be adhered, so that the air leakage channel cannot be opened, the tire can not be normally relieved, and the tire burst can occur, so that traffic accidents can easily occur due to the tire burst when the vehicle runs, particularly when the vehicle runs at high speed.
3. The ball is matched with the valve seat for sealing, so that the sealing performance is poor, and air leakage is easy to generate.
In addition, the conventional common explosion-proof core capable of adjusting the pressure relief pressure generally adjusts the pressure relief pressure of the valve core through the elastic force difference of two springs, and has a complex structure and is difficult to adjust the pressure relief pressure.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
Aiming at the defects, the invention provides the valve core of the explosion-proof tire, which can improve the strength of a core rod and prolong the service life of the valve core; the sealing gasket can be effectively prevented from being adhered, the air escape channel is ensured to be normally opened, the tire burst phenomenon caused by abnormal pressure relief is avoided, and the running safety of the vehicle is improved; the pressure relief pressure can be conveniently adjusted, the structure is simple, and the operation is easy; can improve the sealing performance and effectively avoid the air leakage phenomenon.
In order to solve the technical problems, the invention adopts the following technical scheme: an explosion-proof tire valve core comprises a core rod and a shaft sleeve, wherein a through hole is formed in the shaft sleeve; the shaft sleeve is connected to one end of the core rod; one end of the core bar, which is connected with the shaft sleeve, is provided with an air leakage channel;
a mandrel is arranged in the through hole of the shaft sleeve; a pressure relief spring is arranged between the mandrel and the core rod;
the pressure relief sealing gasket is arranged on the mandrel and seals the opening of the through hole of the shaft sleeve close to the mandrel together with the mandrel.
Furthermore, an annular groove is formed in the mandrel, and a pressure relief sealing gasket is arranged in the annular groove; the pressure relief sealing gasket is in contact sealing with a sealing step arranged in the inner cavity of the shaft sleeve; and a gap is reserved between the side wall of the pressure relief sealing gasket and the inner wall of the through hole of the shaft sleeve.
Further, the air leakage channel is communicated with the inner cavity of the shaft sleeve; the air leakage channel comprises a first hole, and the first hole extends to the inside from the end face of the connecting end of the core rod and the shaft sleeve along the axis.
Furthermore, the core rod penetrates through the core body and the core cap, and a gap is formed between the core rod and the core body as well as between the core rod and the core cap; the pressure relief channel further comprises a second hole, one end of the second hole is communicated with the first hole, and the other end of the second hole is communicated with a gap between the core rod and the core body.
Furthermore, the pressure relief sealing gasket is tightly contacted with the upper side surface and/or the lower side surface of the annular groove of the mandrel and/or the bottom surface of the groove, and the part of the lower end surface of the pressure relief sealing gasket, which is far away from the axis of the mandrel, is contacted and sealed with a sealing step in the inner cavity of the shaft sleeve;
the width K of the contact surface between the lower end face of the pressure relief sealing gasket and the sealing step in the inner cavity of the shaft sleeve is 0.1-0.5 mm.
Furthermore, one end of the core rod is provided with an external thread end, and one end of the shaft sleeve is provided with an internal thread end; the external thread end is connected with the internal thread end in a screwing mode; the pressure relief pressure is adjusted by adjusting the threaded connection position between the core rod and the shaft sleeve.
Furthermore, the number of the second holes is one or more, and the second holes are perpendicular to the axis of the core rod or form a certain angle with the axis of the core rod.
Further, the diameter of the air leakage channel is 0.5-1.1 mm.
Furthermore, the core bar is sleeved with a return spring, one end of the return spring is abutted against the limiting part of the core bar, and the other end of the return spring is abutted against the core cap or a step in the core body.
Further, an air inlet sealing gasket is arranged at the lower port of the core body, the air inlet sealing gasket is sleeved on the core rod, the core rod drives the air inlet sealing gasket to move up and down, and the lower port of the core body is opened or closed.
After the technical scheme is adopted, compared with the prior art, the invention has the following advantages:
the pressure relief sealing gasket is fixed in the annular groove of the mandrel and can move along with the mandrel, the pressure relief sealing gasket is separated from the sealing step in the shaft sleeve, and gas is discharged from the side face of the pressure relief sealing gasket, so that the defect that the gas cannot be discharged from a through hole in the middle of the pressure relief sealing gasket due to the adhesion of a sealing device (a ball or a plate) and a valve seat or the sealing gasket in the prior art is overcome, and the phenomenon that the sealing gasket is adhered and cannot be subjected to pressure relief due to the increase of the air temperature of.
In the prior art, a hole for installing a pressure relief spring is arranged in a core rod, so that the side wall of the core rod is thin, the strength of the core rod is poor, and the position is easy to break after the core rod is used for a long time under the action of a return spring and the pressure relief spring, so that the valve core is failed, and the tire is deflated; the spring is arranged outside the core bar, and the air leakage channel is only arranged on the core bar, so that the strength of the core bar is improved, and the service life of the valve core is prolonged.
The invention can also effectively improve the sealing property and avoid the air leakage phenomenon.
In conclusion, the strength of the core rod can be improved, and the service life of the valve core is prolonged; the sealing gasket can be effectively prevented from being adhered, the air escape channel is ensured to be normally opened, the tire burst phenomenon caused by abnormal pressure relief is avoided, and the running safety of the vehicle is improved; the pressure relief pressure can be conveniently adjusted, the structure is simple, and the operation is easy; can improve the sealing performance and effectively avoid the air leakage phenomenon.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of the pressure relief of the present invention (with the pressure relief port closed);
FIG. 3 is a partial enlarged view of the pressure relief of the present invention (the pressure relief port is open, and the arrow in the figure indicates the flow direction of the pressure relief air flow);
FIG. 4 is a sectional view A-A in FIG. 2 (the second hole is one in number);
FIG. 5 is a sectional view A-A in FIG. 2 (the second holes are two in number);
FIG. 6 is a sectional view A-A in FIG. 2 (the second holes are three in number);
FIG. 7 is a sectional view taken along line A-A in FIG. 2 (the second holes are four in number);
in the figure, the position of the upper end of the main shaft,
1-core cap, 2-core body, 3-sealing ring, 4-return spring, 5-core rod, 51-air release channel, 511-first hole, 512-second hole, 52-external thread end, 6-air inlet sealing gasket, 7-shaft sleeve, 71-internal thread end, 72-sealing step, 73-pressure release port, 8-pressure release sealing gasket, 9-pressure release spring and 10-core shaft.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Example 1
As shown in figures 1-3, the invention provides a valve core of a run-flat tire, which comprises a core body 2, a core cap 1 and a core rod 5, wherein the core rod 5 can move up and down, the core cap 1 is arranged at one end of the core body 2, and the core rod 5 penetrates through the core body 2 and the core cap 1 and is provided with a gap with the core body 2 and the core cap 1.
The part of the core rod 5 extending out of the core body 2 is in threaded connection with a shaft sleeve 7, specifically, the end part of the core rod 5 is provided with an external thread end 52, and the upper end of the shaft sleeve 7 is provided with an internal thread end 71; the external thread end 52 is matched with the internal thread end 71 in a screwing mode, and the core rod 5 is fastened with the shaft sleeve 7.
The lower port of the core body 2 is provided with an air inlet sealing gasket 6, the air inlet sealing gasket 6 is sleeved on the core rod 5, the core rod 5 drives the air inlet sealing gasket 6 to move up and down, and the lower port of the core body 2 is opened or closed.
The core bar 5 is sleeved with a return spring 4, one end of the return spring 4 abuts against a limiting part of the core bar 5, and the limiting part of the core bar 5 is an annular table; the other end of the return spring 4 abuts on a step (not shown in the figure) in the core cap 1 or the core body 2.
A relief channel 51 is arranged in the core rod 5, the relief channel 51 comprises a first hole 511 and a second hole 512, and the first hole 511 extends from the end surface of the external thread end 52 to the inner part of the core rod 5 positioned in the core body 2 part along the axis; the number of the second holes 512 is one or more; the second hole 512 is communicated with one end of the first hole 511 far away from the end face of the external thread end 52, and the second hole 512 is communicated with the gap between the core rod 5 and the core body 2.
The diameter D of the air leakage channel 51 is 0.5-1.1mm, and the requirement of product exhaust is met.
The opening of the air escape channel 51 has various modes, specifically as follows:
as shown in fig. 4, the number of the second holes 512 is one, the second holes 512 are perpendicular to or at an angle with the axis of the core rod 5, and the second holes 512 extend inward from one side of the core rod 5 to communicate with the first holes 511.
As shown in fig. 5, the number of the second holes 512 is two, two second holes 512 are arranged at 180 degrees, the second holes 512 are arranged perpendicular to the axial line of the core rod 5 or at a certain angle, and the second holes 512 extend inward from one side of the core rod 5 to communicate with the first holes 511.
As shown in fig. 6, the number of the second holes 512 is three, three second holes 512 are uniformly arranged along the circumferential direction of the core rod 5, the included angle between the axes of two adjacent second holes 512 is 120 °, each second hole 512 is arranged perpendicular to or at a certain angle with the axis of the core rod 5, and the second holes 512 extend inwards from one side of the core rod 5 to be communicated with the first holes 511.
As shown in fig. 7, the number of the second holes 512 is four, four second holes 512 are uniformly arranged along the circumferential direction of the core rod 5, an included angle between the axes of two adjacent second holes 512 is 90 °, each second hole 512 is arranged perpendicular to or at a certain angle with the axis of the core rod 5, and the second holes 512 extend inwards from one side of the core rod 5 to be communicated with the first holes 511.
The number of the second holes 512 may also be five, six or more, and the specific number is subject to actual requirements.
The shaft sleeve 7 is provided with a through hole along the axis, a mandrel 10 is arranged in the through hole of the shaft sleeve 7, a pressure relief sealing gasket 8 is sleeved on the mandrel 10, specifically, the pressure relief sealing gasket 8 is fixed in an annular groove formed in the mandrel 10, the pressure relief sealing gasket 8 is in close contact with the upper side face and/or the lower side face and/or the groove bottom face of the annular groove of the mandrel 10, the pressure relief sealing gasket 8 is preferably in close contact with the upper side face, the lower side face and the groove bottom face of the annular groove of the mandrel 10, one part of the lower end face of the pressure relief sealing gasket 8, which is far away from the axis of the mandrel 10, is in contact sealing with a sealing step 72 in the inner cavity of the shaft sleeve 7; the width K of the contact surface of the lower end face of the pressure relief sealing gasket 8 and the sealing step 72 in the inner cavity of the shaft sleeve 7 is 0.1-0.5mm, and the product has stable exhaust pressure.
A pressure relief spring 9 is arranged between the mandrel 10 and the core rod 5, and two ends of the pressure relief spring 9 are respectively abutted against the end parts of the core rod 5 and the mandrel 10.
The outside cover of core 2 is equipped with sealing washer 3, sealing washer 3 is used for the valve inside and aerifys orificial sealed.
The working principle of the invention is as follows:
sealing step and the sealed pad of pressure release on the axle sleeve realize sealed under pressure release spring's effect, and when tire pressure exceeded and set for the restriction, the packing force of pressure release spring can be overcome to atmospheric pressure, flows through the pressure release port of axle sleeve for gaseous the automatic action of disappointing of high pressure is accomplished through the passageway of disappointing, and when atmospheric pressure dropped to normal numerical value, pressure release spring played the effect of compressing tightly once more, realizes the sealed of sealed step and the sealed terminal surface of pad of pressure release.
When the invention is inflated, the inflation pipe orifice of the motor vehicle is butted with the core cap to press the core rod to move downwards, so that the lower port of the core body and the upper port of the shaft sleeve are opened, and gas enters the tire.
The pressure relief sealing gasket is fixed in the annular groove of the mandrel and can move along with the mandrel, the pressure relief sealing gasket is separated from the sealing step in the shaft sleeve, and gas is discharged from the side face of the pressure relief sealing gasket, so that the defect that the gas cannot be discharged from a through hole in the middle of the pressure relief sealing gasket due to the adhesion of a sealing device (a ball or a plate) and a valve seat or the sealing gasket in the prior art is overcome, and the phenomenon that the sealing gasket is adhered and cannot be subjected to pressure relief due to the increase of the air temperature of.
In the prior art, a hole for installing a pressure relief spring is arranged in a core rod, so that the side wall of the core rod is thin, the strength of the core rod is poor, and the position is easy to break after the core rod is used for a long time under the action of a return spring and the pressure relief spring, so that the valve core is failed, and the tire is deflated; the spring is arranged outside the core bar, and the air leakage channel is only arranged on the core bar, so that the strength of the core bar is improved, and the service life of the valve core is prolonged.
The shaft sleeve and the core rod are in threaded connection, the pressure relief pressure can be adjusted by adjusting the threaded connection position according to different conditions, the problem that the pressure relief pressure of the valve core is required to be adjusted by the elasticity difference of two springs in the conventional common explosion-proof valve core is solved, and the valve core is simple in structure and easy to operate;
in conclusion, the strength of the core rod can be improved, and the service life of the valve core is prolonged; the sealing gasket can be effectively prevented from being adhered, the air escape channel is ensured to be normally opened, the tire burst phenomenon caused by abnormal pressure relief is avoided, and the running safety of the vehicle is improved; the pressure relief pressure can be conveniently adjusted, the structure is simple, and the operation is easy; can improve the sealing performance and effectively avoid the air leakage phenomenon.
The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.
Claims (10)
1. The utility model provides a run-flat tire valve inside, includes core bar (5) and axle sleeve (7), its characterized in that: a through hole is formed in the shaft sleeve (7); the shaft sleeve (7) is connected to one end of the core rod (5); one end of the core rod (5) connected with the shaft sleeve (7) is provided with an air leakage channel (51);
a mandrel (10) is arranged in the through hole of the shaft sleeve (7); a pressure relief spring (9) is arranged between the mandrel (10) and the core rod (5);
the pressure relief sealing gasket (8) is arranged on the mandrel (10), and the pressure relief sealing gasket (8) and the mandrel (10) jointly seal an opening of the through hole of the shaft sleeve (7) close to the mandrel (10).
2. A run flat valve core as defined in claim 1, wherein: an annular groove is formed in the mandrel (10), and a pressure relief sealing gasket (8) is arranged in the annular groove; the pressure relief sealing gasket (8) is in contact sealing with a sealing step arranged in the inner cavity of the shaft sleeve (7); and a gap is reserved between the side wall of the pressure relief sealing gasket (8) and the inner wall of the through hole of the shaft sleeve (7).
3. A run flat valve core as defined in claim 1, wherein: the air release channel (51) is communicated with the inner cavity of the shaft sleeve (7); the air release channel (51) comprises a first hole (511), and the first hole (511) extends to the inside from the end face of the connecting end of the core rod (5) and the shaft sleeve (7) along the axis.
4. A run flat valve core according to claim 3, wherein: the core rod (5) penetrates through the core body (2) and the core cap (1), and a gap is formed between the core rod and the core body (2) as well as between the core rod and the core cap (1);
the pressure relief channel (51) further comprises a second hole (512), one end of the second hole (512) is communicated with the first hole (511), and the other end of the second hole is communicated with a gap between the core rod (5) and the core body (2).
5. A run flat valve core according to claim 2, wherein: the pressure relief sealing gasket (8) is tightly contacted with the upper side surface and/or the lower side surface and/or the groove bottom surface of the annular groove of the mandrel (10); the part of the lower end surface of the pressure relief sealing gasket (8) far away from the axis of the mandrel (10) is in contact sealing with a sealing step in the inner cavity of the shaft sleeve (7);
the width K of the contact surface of the lower end face of the pressure relief sealing gasket (8) and the sealing step in the inner cavity of the shaft sleeve (7) is 0.1-0.5 mm.
6. A run flat valve core as defined in claim 1, wherein: an external thread end (52) is arranged at one end of the core rod (5), and an internal thread end (71) is arranged at one end of the shaft sleeve (7); the external thread end (52) is screwed with the internal thread end (71); the pressure relief pressure is adjusted by adjusting the threaded connection position between the core rod (5) and the shaft sleeve (7).
7. A run flat valve core according to claim 4, wherein: the number of the second holes (512) is one or more, and the second holes (512) are perpendicular to the axis of the core rod (5) or form a certain angle.
8. A run flat valve core as defined in claim 1, wherein: the diameter of the air leakage channel (51) is 0.5-1.1 mm.
9. A run flat valve core according to claim 4, wherein: the core rod (5) is sleeved with a return spring (4), one end of the return spring (4) abuts against the limiting part of the core rod (5), and the other end of the return spring abuts against a step in the core cap (1) or the core body (2).
10. A run flat valve core as defined in claim 9, wherein: the lower port of the core body (2) is provided with an air inlet sealing gasket (6), the air inlet sealing gasket (6) is sleeved on the core rod (5), the air inlet sealing gasket (6) is driven by the core rod (5) to move up and down, and the lower port of the core body (2) is opened or closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011062313.1A CN112066049A (en) | 2020-09-30 | 2020-09-30 | Valve inside of explosion-proof tyre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011062313.1A CN112066049A (en) | 2020-09-30 | 2020-09-30 | Valve inside of explosion-proof tyre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112066049A true CN112066049A (en) | 2020-12-11 |
Family
ID=73683294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011062313.1A Pending CN112066049A (en) | 2020-09-30 | 2020-09-30 | Valve inside of explosion-proof tyre |
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| Country | Link |
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| CN (1) | CN112066049A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280163A (en) * | 2021-01-09 | 2021-08-20 | 高密同创气门芯有限公司 | Valve inside of explosion-proof tyre |
| CN117128346A (en) * | 2023-10-26 | 2023-11-28 | 高密同创气门芯有限公司 | Explosion-proof valve inside |
-
2020
- 2020-09-30 CN CN202011062313.1A patent/CN112066049A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280163A (en) * | 2021-01-09 | 2021-08-20 | 高密同创气门芯有限公司 | Valve inside of explosion-proof tyre |
| CN117128346A (en) * | 2023-10-26 | 2023-11-28 | 高密同创气门芯有限公司 | Explosion-proof valve inside |
| CN117128346B (en) * | 2023-10-26 | 2024-02-23 | 高密同创气门芯有限公司 | Explosion-proof valve inside |
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