CN220727308U - Sealing structure of high-pressure gas switching valve - Google Patents
Sealing structure of high-pressure gas switching valve Download PDFInfo
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- CN220727308U CN220727308U CN202322378798.0U CN202322378798U CN220727308U CN 220727308 U CN220727308 U CN 220727308U CN 202322378798 U CN202322378798 U CN 202322378798U CN 220727308 U CN220727308 U CN 220727308U
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- 238000007789 sealing Methods 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 16
- 230000003068 static effect Effects 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- Lift Valve (AREA)
- Multiple-Way Valves (AREA)
Abstract
The utility model relates to a high-pressure gas switching valve sealing structure, which comprises a valve seat, a shell, a valve rod and a limiting sleeve, wherein an air inlet channel is formed in the shell; the air inlet channel is kept normally communicated with the high-pressure cavity, and the high-pressure cavity is selectively communicated with the air outlet channel; a sealing rod is arranged in a sealing rod mounting hole of the valve rod, part of the sealing rod protrudes upwards out of the upper end face of the valve rod, and the side face of the sealing rod protruding out of the upper end face of the valve rod is an inner sealing surface; when the lower end face of the valve seat is contacted with the upper end face of the valve rod, the inner sealing face of the sealing rod and the outer sealing face of the lower end part of the air outlet channel form contact seal. The utility model can be opened and closed at high frequency, and can effectively avoid the damage of the sealing element in the working process.
Description
Technical Field
The utility model belongs to the technical field of high-pressure gas sealing, and particularly discloses a high-pressure gas switching valve sealing structure.
Background
Along with the transformation and upgrading of national energy structures, more and more clean energy sources are developed and utilized, and in recent years, ammonia, natural gas, hydrogen and the like are used as alternative fuels, and rapidly develop in the traffic direction. In the use process of the gas fuels, the problem of tightness of high-pressure gas is inevitably required to be solved, and the high-pressure gas seal mainly comprises a static seal and a dynamic seal, wherein the static seal comprises an axial seal, a radial seal and the like, and the dynamic seal comprises a linear reciprocating motion seal, a rotary seal and the like.
The existing switch valve is generally low in use frequency, a sealing mode adopts a conventional static seal, but the conventional static seal and dynamic seal are not suitable for actual use working conditions along with the diversification of products.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide the high-pressure gas switch valve sealing structure which is suitable for high-frequency work, can effectively avoid damage of sealing elements, and has the advantages of simple sealing structure, good reliability and good manufacturability.
According to the technical scheme provided by the utility model, the high-pressure gas switching valve sealing structure comprises a valve seat, a shell, a valve rod and a limiting sleeve, wherein the shell is fixedly connected with the limiting sleeve, an air inlet channel is formed in the shell, a valve rod mounting hole is formed in the limiting sleeve, the valve rod is arranged in the valve rod mounting hole, a limiting ring is arranged on the outer circle of the lower end of the valve rod, the valve seat is arranged in the shell above the corresponding valve rod, the valve seat can reciprocate up and down along the central axis of the valve rod, an air outlet channel is formed in the valve seat, the lower end part of the air outlet channel is in an outward expansion shape, and the inner wall of the lower end part of the air outlet channel is an outer sealing surface;
when the lower end face of the valve seat is contacted with the upper end face of the valve rod, a high-pressure cavity is defined by the valve seat, the shell, the valve rod and the limiting sleeve; the air inlet channel is kept normally communicated with the high-pressure cavity, and the high-pressure cavity is selectively communicated with the air outlet channel;
a sealing rod mounting hole is formed downwards from the upper end face of the valve rod, a sealing rod is mounted in the sealing rod mounting hole, part of the sealing rod protrudes upwards out of the upper end face of the valve rod, and the side face of the sealing rod protruding out of the upper end face of the valve rod is an inner sealing surface; when the lower end face of the valve seat is contacted with the upper end face of the valve rod, the inner sealing face of the sealing rod and the outer sealing face of the lower end part of the air outlet channel form contact seal.
Preferably, the outer sealing surface of the lower end portion of the air outlet channel is a conical surface or a spherical surface.
Preferably, the inner sealing surface on the sealing rod is a conical surface or a spherical surface.
The utility model provides a high-pressure gas switching valve seal structure, it includes disk seat, casing, valve rod and stop collar, casing and stop collar are fixed connection, have offered the air inlet channel on the casing, have offered the valve rod mounting hole on the stop collar, install the valve rod in the valve rod mounting hole, be equipped with the stop collar on the lower extreme excircle of valve rod, install the disk seat in the casing above the corresponding valve rod, the disk seat can reciprocate from top to bottom along the axis of valve rod, has offered the air outlet channel in the disk seat, the air inlet of air outlet channel is located on the lower terminal surface of disk seat;
when the lower end face of the valve seat is contacted with the upper end face of the valve rod, a high-pressure cavity is defined by the valve seat, the shell, the valve rod and the limiting sleeve; the air inlet channel is kept normally communicated with the high-pressure cavity, and the high-pressure cavity is selectively communicated with the air outlet channel;
the lower terminal surface of disk seat is around the passageway of giving vent to anger and has been seted up annular seal groove, follow the up end of valve rod has offered the sealing washer mounting groove downwards, installs the sealing washer in the sealing washer mounting groove, and the protruding high degree of depth that is greater than annular seal groove of partial sealing washer upwards protrusion valve rod, the up end of sealing washer with annular seal groove's bottom surface is the contact seal.
Preferably, the outlet passage is provided in the valve seat along the axial direction thereof.
The utility model can be opened and closed at high frequency, and can effectively avoid the damage of the sealing element in the working process. The sealing structure is simple, and the reliability and the manufacturability are good.
Drawings
Fig. 1 is a schematic view of the structure of example 1 when the valve seat is about to come into contact with the valve stem.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic view of the structure of example 1 when the valve seat is in contact with the valve stem.
Fig. 4 is an enlarged view of a portion B in fig. 3.
Fig. 5 is a schematic view of the structure of example 2 when the valve seat is about to come into contact with the valve stem.
Fig. 6 is a schematic view of the structure of example 2 when the valve seat is in contact with the valve stem.
Detailed Description
The utility model will be further illustrated with reference to specific examples.
Example 1
1-4, it includes valve base 1, body 2, valve rod 4 and stop collar 5, body 2 and stop collar 5 are fixedly connected, offer the air inlet channel 2.1 on body 2, offer the valve rod mounting hole 5.1 on stop collar 5, install valve rod 4 in the valve rod mounting hole 5.1, there are stop collars on the lower excircle of valve rod 4, install the valve base 1 in the body 2 above the corresponding valve rod 4, the valve base 1 can reciprocate up and down along the axis of the valve rod 4, offer the air outlet channel 1.1 in the valve base 1, the lower end of the air outlet channel 1.1 is the shape of expanding outwards, the lower end inner wall of the air outlet channel 1.1 is the outer seal surface 1.2;
when the lower end face of the valve seat 1 is contacted with the upper end face of the valve rod 4, a high-pressure cavity 6 is defined by the valve seat 1, the shell 2, the valve rod 4 and the limit sleeve 5; the air inlet channel 2.1 is kept normally communicated with the high-pressure cavity 6, and the high-pressure cavity 6 is selectively communicated with the air outlet channel 1.1;
a sealing rod mounting hole 4.2 is formed downwards from the upper end face of the valve rod 4, a sealing rod 30 is mounted in the sealing rod mounting hole 4.2, part of the sealing rod 30 protrudes upwards from the upper end face of the valve rod 4, the side face of the sealing rod 30 protruding from the upper end face of the valve rod 4 is an inner sealing face 30.1, and the inner sealing face 30.1 on the sealing rod 30 is in contact sealing with the outer sealing face 1.2 at the lower end of the air outlet channel 1.1.
The outer sealing surface 1.2 at the lower end part of the air outlet channel 1.1 is a conical surface or a spherical surface. The inner sealing surface 30.1 on the sealing rod 30 is a conical surface or a spherical surface.
In embodiment 1, the sealing rod 30 is made of non-metal material, the deformation of the inner sealing surface 30.1 of the sealing rod 30 is such that the sealing rod 30 is in the elastic deformation range, and the sealing rod 30 is connected with the valve rod 4 by means of threads, interference, gluing and the like; the outer circle of the valve rod 4 is matched with the valve rod mounting hole 5.1 of the limit sleeve 5 with a small clearance. The lower end face of the valve seat 1 is in contact limit with the upper end face of the valve rod 4, and at the moment, the inner sealing face of the sealing rod 30 has a small deformation and forms contact seal with the outer sealing face 1.2 at the lower end of the air outlet channel 1.1.
In the embodiment 1, the lower end surface of the valve seat 1 contacts with the upper end surface of the valve rod 4 to limit, the inner sealing surface 30.1 on the sealing rod 30 contacts with the outer sealing surface 1.2 at the lower end of the air outlet channel 1.1 to realize sealing, and in the opening state, the valve rod 4 is limited by the limiting sleeve 5, the inner sealing surface 30.1 on the sealing rod 30 is separated from the outer sealing surface 1.2 at the lower end of the air outlet channel 1.1, and high-pressure air flows out from the air outlet channel 1.1.
The working principle of example 1 is as follows:
in the initial state, the valve seat 1 moves downwards in the shell 2, the inner sealing surface 30.1 on the sealing rod 30 is in contact with the outer sealing surface 1.2 at the lower end of the air outlet channel 1.1, when the valve rod 4 reaches the bottom dead center, the lower end surface of the valve seat 1 is in contact with the upper end surface of the valve rod 4 for limiting, at the moment, a small deformation amount exists in the inner sealing surface 30.1 on the sealing rod 30, the inner sealing surface is in contact with the outer sealing surface 1.2 at the lower end of the air outlet channel 1.1 for sealing, then high-pressure gas enters the high-pressure cavity 6 from the air inlet channel 2.1, when the valve seat 1 moves upwards in the shell 2, the valve rod 4 is limited by the limiting sleeve 5, the inner sealing surface 30.1 on the sealing rod 30 is separated from the outer sealing surface 1.2 at the lower end of the air outlet channel 1.1, and the high-pressure gas flows out from the air outlet channel 1.1.
Example 2
The utility model provides a high-pressure gas switching valve seal structure, as shown in fig. 5 and 6, it includes disk seat 1, casing 2, valve rod 4 and stop collar 5, casing 2 is fixed connection with stop collar 5, offer air inlet channel 2.1 on casing 2, offer valve rod mounting hole 5.1 on stop collar 5, install valve rod 4 in valve rod mounting hole 5.1, be equipped with the stop collar on the lower extreme excircle of valve rod 4, install disk seat 1 in casing 2 above corresponding valve rod 4, disk seat 1 can reciprocate from top to bottom along the axis of valve rod 4, offer air outlet channel 1.1 in disk seat 1, the air inlet of air outlet channel 1.1 is located on the lower terminal surface of disk seat 1;
when the lower end face of the valve seat 1 is contacted with the upper end face of the valve rod 4, a high-pressure cavity 6 is defined by the valve seat 1, the shell 2, the valve rod 4 and the limit sleeve 5; the air inlet channel 2.1 is kept normally communicated with the high-pressure cavity 6, and the high-pressure cavity 6 is selectively communicated with the air outlet channel 1.1;
the lower terminal surface of disk seat 1 has offered annular seal groove 1.3 around giving vent to anger passageway 1.1, from the up end of valve rod 4 has offered sealing washer mounting groove 4.1 downwards, installs sealing washer 3 in sealing washer mounting groove 4.1, and the up end of part sealing washer 3 upwards protrusion valve rod 4, and the protrusion height of sealing washer 3 is greater than annular seal groove 1.3's degree of depth, sealing washer 3's up end with annular seal groove 1.3's bottom surface is the contact seal.
The outlet channel 1.1 is arranged in the valve seat 1 along the axial direction thereof.
In embodiment 2, the sealing ring 3 is made of rubber, and the sealing ring 3 is fixed on the valve rod 4 through a vulcanization process; the outer circle of the valve rod 4 is matched with the valve rod mounting hole 5.1 of the limit sleeve 5 with a small clearance.
In the embodiment 2, the lower end surface of the valve seat 1 contacts with the upper end surface of the valve rod 4 to limit in a sealing state, the upper end surface of the sealing ring 3 contacts with the bottom surface of the annular sealing groove 1.3 to realize sealing, the valve rod 4 is limited by the limiting sleeve 5 in an opening state of the switching valve, the upper end surface of the sealing ring 3 is separated from the bottom surface of the annular sealing groove 1.3, and high-pressure gas flows out from the gas outlet channel 1.1.
The working principle of example 2 is as follows:
in the initial state, the valve seat 1 moves downwards in the shell 2, the upper end face of the sealing ring 3 contacts with the bottom face of the annular sealing groove 1.3, after the valve rod 4 reaches the bottom dead center, the lower end face of the valve seat 1 contacts with the upper end face of the valve rod 4 to limit, at the moment, a small deformation amount exists on the upper end face of the sealing ring 3, the sealing ring contacts with the bottom face of the annular sealing groove 1.3 to seal, then high-pressure gas enters the high-pressure cavity 6 from the air inlet channel 2.1, when the valve seat 1 moves upwards in the shell 2, the valve rod 4 is limited by the limiting sleeve 5, the upper end face of the sealing ring 3 is separated from the bottom face of the annular sealing groove 1.3, and the high-pressure gas flows out from the air outlet channel 1.1.
Claims (5)
1. A high-pressure gas switching valve sealing structure is characterized in that: the valve seat comprises a valve seat (1), a shell (2), a valve rod (4) and a limit sleeve (5), wherein the shell (2) is fixedly connected with the limit sleeve (5), an air inlet channel (2.1) is formed in the shell (2), a valve rod mounting hole (5.1) is formed in the limit sleeve (5), the valve rod (4) is mounted in the valve rod mounting hole (5.1), a limit ring is arranged on the outer circle of the lower end of the valve rod (4), the valve seat (1) is mounted in the shell (2) above the corresponding valve rod (4), the valve seat (1) can reciprocate up and down along the central axis of the valve rod (4), an air outlet channel (1.1) is formed in the valve seat (1), the lower end part of the air outlet channel (1.1) is in an outward expansion shape, and the inner wall of the lower end part of the air outlet channel (1.1) is an outer sealing surface (1.2);
when the lower end face of the valve seat (1) is in contact with the upper end face of the valve rod (4), a high-pressure cavity (6) is formed by the valve seat (1), the shell (2), the valve rod (4) and the limiting sleeve (5); the air inlet channel (2.1) is kept normally communicated with the high-pressure cavity (6), and the high-pressure cavity (6) is selectively communicated with the air outlet channel (1.1);
a sealing rod mounting hole (4.2) is formed downwards from the upper end face of the valve rod (4), a sealing rod (30) is mounted in the sealing rod mounting hole (4.2), part of the sealing rod (30) protrudes upwards out of the upper end face of the valve rod (4), and the side face of the sealing rod (30) protruding out of the upper end face of the valve rod (4) is an inner sealing surface; when the lower end face of the valve seat (1) is in contact with the upper end face of the valve rod (4), the inner sealing face (30.1) of the sealing rod (30) and the outer sealing face (1.2) of the lower end part of the air outlet channel (1.1) form contact sealing.
2. The high-pressure gas switching valve sealing structure according to claim 1, characterized in that: the outer sealing surface (1.2) at the lower end part of the air outlet channel (1.1) is a conical surface or a spherical surface.
3. The high-pressure gas switching valve sealing structure according to claim 1, characterized in that: the inner sealing surface (30.1) on the sealing rod (30) is a conical surface or a spherical surface.
4. A high-pressure gas switching valve sealing structure is characterized in that: the valve seat comprises a valve seat (1), a shell (2), a valve rod (4) and a limit sleeve (5), wherein the shell (2) is fixedly connected with the limit sleeve (5), an air inlet channel (2.1) is formed in the shell (2), a valve rod mounting hole (5.1) is formed in the limit sleeve (5), the valve rod (4) is mounted in the valve rod mounting hole (5.1), a limit ring is arranged on the outer circle of the lower end of the valve rod (4), the valve seat (1) is mounted in the shell (2) above the corresponding valve rod (4), the valve seat (1) can reciprocate up and down along the central axis of the valve rod (4), an air outlet channel (1.1) is formed in the valve seat (1), and an air inlet of the air outlet channel (1.1) is positioned on the lower end face of the valve seat (1);
when the lower end face of the valve seat (1) is in contact with the upper end face of the valve rod (4), a high-pressure cavity (6) is formed by the valve seat (1), the shell (2), the valve rod (4) and the limiting sleeve (5); the air inlet channel (2.1) is kept normally communicated with the high-pressure cavity (6), and the high-pressure cavity (6) is selectively communicated with the air outlet channel (1.1);
the lower terminal surface of disk seat (1) is offered annular seal groove (1.3) around giving vent to anger passageway (1.1), follow sealing washer mounting groove (4.1) have been offered downwards to the up end of valve rod (4), install sealing washer (3) in sealing washer mounting groove (4.1), the up end of partial sealing washer (3) upwards protrusion valve rod (4), and the protrusion height of sealing washer (3) is greater than the degree of depth of annular seal groove (1.3), the up end of sealing washer (3) with the bottom surface of annular seal groove (1.3) is the contact seal.
5. The high-pressure gas switching valve sealing structure according to claim 4, wherein: the air outlet channel (1.1) is arranged in the valve seat (1) along the axial direction of the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322378798.0U CN220727308U (en) | 2023-09-01 | 2023-09-01 | Sealing structure of high-pressure gas switching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322378798.0U CN220727308U (en) | 2023-09-01 | 2023-09-01 | Sealing structure of high-pressure gas switching valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220727308U true CN220727308U (en) | 2024-04-05 |
Family
ID=90490086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322378798.0U Active CN220727308U (en) | 2023-09-01 | 2023-09-01 | Sealing structure of high-pressure gas switching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220727308U (en) |
-
2023
- 2023-09-01 CN CN202322378798.0U patent/CN220727308U/en active Active
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