CN108443511A - A kind of adjustable axial sealer of sealed pressure - Google Patents
A kind of adjustable axial sealer of sealed pressure Download PDFInfo
- Publication number
- CN108443511A CN108443511A CN201810472062.0A CN201810472062A CN108443511A CN 108443511 A CN108443511 A CN 108443511A CN 201810472062 A CN201810472062 A CN 201810472062A CN 108443511 A CN108443511 A CN 108443511A
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- Prior art keywords
- component
- elastic seal
- seal ring
- valve
- pressurising
- Prior art date
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- 238000001514 detection method Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 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
- 210000002445 nipple Anatomy 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of adjustable axial sealers of sealed pressure, including the first component and second component to be sealed, and axial seal component, the seal assembly includes the elastic seal ring for having hollow cavity, the pressurising pipe extended radially outward from the outside circumference of the elastic seal ring, the tube chamber of the pressurising pipe is connected with the hollow cavity of the elastic seal ring, the pressurising pipe extends outward to form the first branch pipe and the second branch pipe, the nozzle of first branch pipe is connected with the supercharging device for being filled with pressurising medium in the hollow cavity to the elastic seal ring, the first valve is equipped between first branch pipe and the supercharging device, the nozzle of second branch pipe is equipped with the second valve of unilaterally connected air.By being filled with pressurising medium in the hollow cavity to elastic seal ring or discharging the pressurising medium of part, enable to elastic seal ring elasticity adjustable, the holding first component is reliable and stable with second component axial seal.
Description
Technical field
The present invention relates to a kind of adjustable axial sealers of sealed pressure.
Background technology
Often exist in large scale vessel flange, pipe flange sealing applications in fields such as oil, chemical industry and nuclear powers
It is deformed not between each element of seal nipple caused by temperature fluctuation, pressure oscillation and unlike material difference linear expansion coefficient
Coordinate, simultaneously because the factors such as sealing structure assembly and dimensional tolerance or error cause, Sealing Stress lacks or sealing element is over-pressed
Conquassation, leads to sealing leak.
Invention content
The object of the present invention is to provide a kind of adjustable axial sealers of sealed pressure, so that close at sealing station
It is constant in the range of setting to seal stress, it is ensured that the reliability of axial seal between component.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of adjustable axial sealer of sealed pressure,
Including the first component and second component to be sealed, and it is used for axial seal between the first component and the second component
Seal assembly, the seal assembly includes the elastic seal ring for having hollow cavity, the both sides shaft end of the elastic seal ring
Portion respectively with the shaft end of the first component, the second component shaft end between form in sealing contact, the sealing group
Part further includes the pressurising pipe extended radially outward from the outside circumference of the elastic seal ring, the tube chamber of the pressurising pipe and institute
The hollow cavity for stating elastic seal ring is connected, and the pressurising pipe extends outward to form the first branch pipe and the second branch pipe, institute
The nozzle for stating the first branch pipe is connected with supercharging for being filled with pressurising medium in from the hollow cavity to the elastic seal ring
Device, is equipped with the first valve between first branch pipe and the supercharging device, the nozzle of second branch pipe is equipped with the second valve
Door, when second valve is opened described in the second branch pipe towards unilaterally connected outside the pressurising pipe.
Preferably, the seal assembly includes multiple elastic seal rings of coaxial inner conductor setting, adjacent two
Connected by the connecting tube that radially extends between the elastic seal ring, the two neighboring elastic seal ring it is described hollow
Inner cavity is connected by the tube chamber of the connecting tube.
Further, the connecting tube and the adjacent two integrally formed settings of elastic seal ring.
Further, the connecting tube has more of one or circumferentially spaced, alternatively, the connecting tube is around institute
State annular dowel made of the axial line rotation of elastic seal ring.
Preferably, the pressurising pipe is wholely set with the elastic seal ring, the pressurising Guan Youyi roots or circumferentially between
Every more of distribution.
Preferably, the supercharging device includes constant-pressure tank, the outlet of the constant-pressure tank when first valve is opened with
The first branch pipe connection.
Preferably, first valve, second valve are automatic stop valve.
Preferably, the seal assembly further includes the pressure sensing for measuring the pressurising pipe intraluminal pressure medium
Device and intelligent pressure regulating device, signal connects between the intelligent pressure regulating device and the pressure sensor, and in the pressure
Control is opened first valve, is more than in the pressure medium value when pressure medium value of sensor measurement is less than setting range
Second valve is opened in control when setting range.
Preferably, it is provided between the shaft end of the first component and the shaft end of the second component for accommodating
The annular storage tank of elastic seal ring is stated, the elastic seal ring is housed in the annular storage tank and forms described first
Axial seal connection between part and the second component.
Further, the axial sealer further includes leak detection component, wherein the shaft end of the first component
It is additionally provided between the shaft end of the second component and draws leakage hole, the leak detection with what the annular storage tank was connected
Component include draw the leak-off connection of leakage hole, the leak detection tube being connected to the leak-off connection by third valve described in connection, and with institute
The leakage detector of leak detection tube connection is stated, temperature sensor and pressure sensor are additionally provided on the leak detection tube.
Due to the application of the above technical scheme, the present invention has following advantages compared with prior art：The sealing of the present invention
The axial sealer of pressure adjustable waits for the axial seal group being arranged between the first component and second component of axial seal connection
In part use elastic seal ring, by be arranged pressurising pipe can be filled with into the hollow cavity of elastic seal ring pressurising medium or
Discharge the pressurising medium of part so that elastic seal ring elasticity is adjustable, this makes the axial seal component either meet with temperature
When the factors such as degree fluctuation, compression shock, material deformation cause Sealing Stress variation at sealing station, elastic seal ring
Sealing Stress can be adjusted to a constant range, keep the stabilization of axial seal between the first component and second component can
It leans on.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of the axial seal component of embodiment 1；
Attached drawing 2 is the structural schematic diagram of the axial sealer for the axial seal component for being equipped with embodiment 1；
Attached drawing 3 is the portions A enlarged diagram in attached drawing 2；
Attached drawing 4 is the structural schematic diagram of the axial seal component of embodiment 2；
Attached drawing 5 is the structural schematic diagram of the axial sealer for the axial seal component for being equipped with embodiment 2；
Attached drawing 6 is the portions B enlarged diagram in attached drawing 5；
Attached drawing 7 is structural schematic diagram when adding leak detection component on the basis of attached drawing 5；
Attached drawing 8 is the portions C enlarged diagram in attached drawing 7；
Attached drawing 9 is another remodeling mounting structure of the axial sealer of attached drawing 2；
Attached drawing 10 is another remodeling mounting structure of the axial sealer of attached drawing 7；
Wherein：1, elastic seal ring；2, pressurising pipe；21, the first branch pipe；22, the second branch pipe；3, the first valve；4, the second valve；
5, pressure sensor；6, constant-pressure tank；7, intelligent pressure regulating device；8, pressure gauge；9, connecting tube；10, pressurising medium；20, the first gold medal
Belong to ring；30, the second becket；40, third becket；
11, leak-off connection；12, third valve；13, leak detection tube；14, leakage detector；15, temperature sensor；16, pressure sensing
Device；17, pressure gauge；100, the first component；101, draw leakage hole；200, second component；201, annular storage tank；202, connectivity slot.
Specific implementation mode
Technical scheme of the present invention is further elaborated with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
Axial seal component shown in Figure 1 comprising the elastic seal ring 1 with hollow cavity, the elastic seal ring 1
Both sides shaft end is respectively used to be formed between the component of connection to be sealed in sealing contact.The seal assembly further includes that own elasticity is close
The pressurising pipe 2 that the outside circumference of seal 1 extends radially outward, the hollow cavity of the tube chamber and elastic seal ring 1 of the pressurising pipe 2
It is connected, pressurising pipe 2 extends outwardly and forms the first branch pipe 21 and the second branch pipe 22, and the nozzle of the first branch pipe 21, which is connected with, to be used for
It is filled with the supercharging device of pressurising medium 10 into the tube chamber of pressurising pipe 2, first is equipped between the first branch pipe 21 and the supercharging device
Valve 3, the nozzle of the second branch pipe 22 is equipped with the second valve 4, and when which opens, the second branch pipe 22 is towards outside pressurising pipe 2
Portion's unilaterally connected.
In this way, when pressure medium is not up to sets requirement in the hollow cavity of elastic seal ring 1, by opening the first valve
Door 3, can be filled with pressurising medium into pressurising pipe 2, so that the pressure medium in elastic seal ring 1 increases；When elasticity is close
It, can will be in elastic seal ring 2 by opening the second valve 4 when pressure medium is more than sets requirement in the hollow cavity of seal 1
Medium discharge a part and realize pressure release so that elastic seal ring 1 keeps good between the component of connection to be sealed
Good seal operation state.
Specifically, shown in Figure 1, pressurising pipe 2 can be set as one in the way of the present embodiment, may be set to be
Circumferentially spaced more, the pressurising pipe 2 are wholely set with elastic seal ring 1.Elastic seal ring 1 may be used metal or
Nonmetallic materials are made, it is preferred to use and it is nonmetallic, such as rubber.The section of elastic seal ring 1 preferably uses O-shaped.
Supercharging device includes constant-pressure tank 6, and the outlet of the constant-pressure tank 6 is connected to when the first valve 3 is opened with the first branch pipe 21,
The pressurising medium in constant-pressure tank 6 is filled with the first branch pipe 21 when the first valve 3 is opened, to increase in elastic seal ring 1
The pressure of medium in empty inner cavity.
In the present embodiment, what 3 and second valve 4 of above-mentioned first valve used is automatic stop valve.The seal assembly is also
Include the pressure sensor 5 for measuring pressure medium in 2 tube chamber of pressurising pipe, for monitoring 1 hollow cavity of elastic seal ring
The pressure of middle medium, to know the sealing state of elastic seal ring 1.
The seal assembly further includes intelligent pressure regulating device 7, and signal connects between the intelligent pressure regulating device 7 and pressure sensor 5
It connects, and can accordingly control opening for the first valve 3 and the second valve 4 according to the pressure medium value that pressure sensor 5 detects
It opens and closes, so that the pressure medium in 2 hollow cavity of elastic seal ring is maintained in setting range.Specifically, when pressure
Control opens the first valve 3 and supplements supercharging into pressurising pipe 2 when the pressure medium value that force snesor 5 measures is less than setting range
Medium, when the pressure medium value that pressure sensor 5 measures is more than setting range control open the second valve 4 and by pressurising pipe
Pressurising medium in 2 discharges a part.
Above-mentioned pressurising medium can be liquid or gas, it is preferred to use inert gas, such as nitrogen.
It is shown in Figure 2, it is used for the axial sealer between two components for the axial seal component of the embodiment, also
I.e. a kind of adjustable axial sealer of sealed pressure comprising the first component 100 to be sealed and second component 200, and
Seal assembly for axial seal between the above-mentioned first component 100 and second component 200.In the present embodiment, the first component 100
It is end flanges to be all made of with second component 200, and elastic seal ring 1 is arranged in the first component 100 with being extruded in an axial direction
Between shaft end and the shaft end of second component 200, and the both sides shaft end of elastic seal ring 1 respectively with the first component 100
Shaft end, second component 200 shaft end between formed it is in sealing contact.
It is specially that annular storage tank 201 is offered on the shaft end of second component 200 herein shown in Fig. 2, Fig. 3,
Elastic seal ring 1 is housed in the annular storage tank 201, upper shaft end keep out on the lower face of the first component 100 and
Form the sealed connection between the first component 100 and second component 200.
In this way, when because the factors such as temperature fluctuation, compression shock, material deformation cause sealing at sealing station to answer
When power changes, pressure sensor 5 detects that the variation of pressure medium in the elastic seal ring 1, intelligent pressure regulating device 7 just can obtain
The pressure medium value that pressure force snesor 5 detects, and the first valve 3 or the second valve are accordingly controlled according to the pressure medium value
The open and close of door 4 so that the stress of elastic seal ring 1 is constant in a certain range.
Embodiment 2
Axial seal component shown in Figure 4, the main distinction is compared with the axial seal component of embodiment 1, this is close
Sealing assembly includes two elastic seal rings 1 of coaxial inner conductor setting, by radially extending between two elastic seal rings 1
Connecting tube 9 connects, and the hollow cavity of two elastic seal rings 1 is connected by the tube chamber of connecting tube 9.In other embodiments
In, elastic seal ring 1 may be set to be three or more of coaxial inner conductor setting, between adjacent two elastic seal rings 1
It is connected to and in communication with by connecting tube 9.
In the present embodiment, connecting tube 9 and adjacent two elastic seal rings 1 use integrally formed setting, and connecting tube 9 can be with
Being set as one, either circumferentially spaced more or connecting tube 9 are to be rotated around the axial line of elastic seal ring 1
Annular dowel.
Referring to Fig. 5, axial sealer shown in fig. 6, by the axial seal component of attached drawing 4 for the first component 100 with
When axial seal between second component 200, open up that there are two annular storage tanks 201 to accommodate two respectively on second component 200
A elastic seal ring 1 is further opened with connectivity slot 202 between two annular storage tanks 201, and connecting tube 9 is threaded through the connectivity slot 202
In.When applying the first component 100 and second component 200 with axial pressing force, two elastic seal rings 1 are compressed in an axial direction
Axial seal connection between the two is formed between the first component and second component 200.
Embodiment 3
Shown in Fig. 7, Fig. 8, the axial sealer of the present embodiment is also additionally arranged leak detection group on the basis of embodiment 2
Part specifically offers on the first component 100 and draws leakage hole 101, this draws leakage hole 101 and is connected with annular storage tank 201, leaks
Detection components include that the leak-off connection 11 of leakage hole 101, the leak detection tube 13 being connected to leak-off connection 11 by third valve 12 are drawn in connection, with
And the leak detection dress device 14 being connect with leak detection tube 13.Temperature sensor 15, pressure sensor 16 are additionally provided on leak detection tube 13
And pressure gauge 17.When seal failure at elastic seal ring 1 causes leakage, the medium of leakage will draw through drawing the entrance of leakage hole 101
Fistulae 11, when opening third valve 12, the medium of leakage will reach leakage detector 14 through leak detection tube 13, to know leakage
Data.
Embodiment 4
Shown in Figure 9, the present embodiment and the set-up mode of embodiment 1 are essentially identical, differ only in the present embodiment and pass through
First becket 20 and the second becket 30 are set between the first component 100 and second component 200 so that the first becket 20
Annular storage tank is formed between the second becket 30 and is used to place elastic seal ring 1, that is, forms the diameter to elastic seal ring 1
To limit, when the first component 100 is compacted in an axial direction with second component 200,30 quilt of the first becket 20 and the second becket
Fixed limit is between the first component 100 and second component 200.
Embodiment 5
Shown in Figure 10, the present embodiment and the set-up mode of embodiment 3 are essentially identical, differ only in the present embodiment and pass through
First becket 20, the second becket 30 and third becket 40 are set between the first component 100 and second component 200, made
Form two annular storage tanks between three and be accordingly placed in for two elastic seal rings 1, and opened on third becket 40
It is penetrated for connecting tube 9 equipped with connectivity slot, is formed and the radial direction of elastic seal ring 1 is limited, when the first component 100 and second component
200 when being compacted in an axial direction, and the first becket 20, the second becket 30 and third becket 40 are fixed limit at first
Between part 100 and second component 200.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of adjustable axial sealer of sealed pressure, including the first component and second component to be sealed, and be used for
The seal assembly of axial seal between the first component and the second component, it is characterised in that：The seal assembly includes
Elastic seal ring with hollow cavity, the both sides shaft end of the elastic seal ring shaft end with the first component respectively
Portion, the second component shaft end between formed in sealing contact, the seal assembly further includes from the elastic seal ring
The pressurising pipe that outside circumference extends radially outward, the tube chamber of the pressurising pipe and the hollow cavity of the elastic seal ring
It is connected, the pressurising pipe extends outward to form the first branch pipe and the second branch pipe, and the nozzle of first branch pipe, which is connected with, to be used for
The supercharging device of pressurising medium, first branch pipe and the supercharging are filled with into the hollow cavity of the elastic seal ring
The first valve is equipped between device, the nozzle of second branch pipe is equipped with the second valve, when second valve is opened described in the
Two branch pipes are towards unilaterally connected outside the pressurising pipe.
2. the adjustable axial sealer of sealed pressure according to claim 1, it is characterised in that：The seal assembly packet
Multiple elastic seal rings of coaxial inner conductor setting are included, by radially prolonging between adjacent two elastic seal rings
The hollow cavity of the connecting tube connection stretched, the two neighboring elastic seal ring is connected by the tube chamber of the connecting tube
It is logical.
3. the adjustable axial sealer of sealed pressure according to claim 2, it is characterised in that：The connecting tube and phase
Two adjacent integrally formed settings of elastic seal ring.
4. the adjustable axial sealer of sealed pressure according to claim 2, it is characterised in that：The connecting tube has one
Root or circumferentially spaced more, alternatively, the connecting tube is made of axial line rotation around the elastic seal ring
Annular dowel.
5. the adjustable axial sealer of sealed pressure according to claim 1, it is characterised in that：The pressurising pipe and institute
It states elastic seal ring to be wholely set, the pressurising Guan Youyi roots or circumferentially spaced more.
6. the adjustable axial sealer of sealed pressure according to claim 1, it is characterised in that：The supercharging device packet
Constant-pressure tank is included, the outlet of the constant-pressure tank is connected to when first valve is opened with first branch pipe.
7. the adjustable axial sealer of sealed pressure according to claim 1, it is characterised in that：First valve,
Second valve is automatic stop valve.
8. the adjustable axial sealer of sealed pressure according to claim 1, it is characterised in that：The seal assembly is also
Include the pressure sensor and intelligent pressure regulating device for measuring the pressurising pipe intraluminal pressure medium, the intelligence is adjusted
Signal connects between pressure device and the pressure sensor, and the pressure medium value measured in the pressure sensor is less than setting
First valve, control opening second valve when the pressure medium value is more than setting range are opened in control when range
Door.
9. according to the adjustable axial sealer of claim 1 to 8 any one of them sealed pressure, it is characterised in that：It is described
The annular for accommodating the elastic seal ring is provided between the shaft end of the first component and the shaft end of the second component
Storage tank, the elastic seal ring be housed in the annular storage tank and formed the first component and the second component it
Between axial seal connection.
10. the adjustable axial sealer of sealed pressure according to claim 9, it is characterised in that：The axial seal
Device further includes leak detection component, wherein between the shaft end of the first component and the shaft end of the second component also
Be provided with the leakage hole that draws being connected with the annular storage tank, the leak detection component include draw leakage hole described in connection draw leakage
Pipe, the leak detection tube that is connected to the leak-off connection by third valve, and the leakage detector that is connect with the leak detection tube, it is described
Temperature sensor and pressure sensor are additionally provided on leak detection tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810472062.0A CN108443511A (en) | 2018-05-17 | 2018-05-17 | A kind of adjustable axial sealer of sealed pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810472062.0A CN108443511A (en) | 2018-05-17 | 2018-05-17 | A kind of adjustable axial sealer of sealed pressure |
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| Publication Number | Publication Date |
|---|---|
| CN108443511A true CN108443511A (en) | 2018-08-24 |
Family
ID=63204567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810472062.0A Pending CN108443511A (en) | 2018-05-17 | 2018-05-17 | A kind of adjustable axial sealer of sealed pressure |
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| Country | Link |
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| CN (1) | CN108443511A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426036A (en) * | 2018-05-17 | 2018-08-21 | 苏州宝骅密封科技股份有限公司 | A kind of adjustable apex combustion seal of sealed pressure |
| CN108443509A (en) * | 2018-05-17 | 2018-08-24 | 苏州宝骅密封科技股份有限公司 | A kind of elastic seal assembly |
| CN113279877A (en) * | 2021-05-28 | 2021-08-20 | 一汽解放汽车有限公司 | Seal gasket and engine |
| CN117450347A (en) * | 2023-12-18 | 2024-01-26 | 山东东信塑胶科技有限公司 | Chemical industry is with compound ABR pipe and sealing connection structure thereof |
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| CN108426036A (en) * | 2018-05-17 | 2018-08-21 | 苏州宝骅密封科技股份有限公司 | A kind of adjustable apex combustion seal of sealed pressure |
| CN108443509A (en) * | 2018-05-17 | 2018-08-24 | 苏州宝骅密封科技股份有限公司 | A kind of elastic seal assembly |
| CN108426036B (en) * | 2018-05-17 | 2024-10-15 | 苏州宝骅密封科技股份有限公司 | Radial sealing device with adjustable sealing pressure |
| CN113279877A (en) * | 2021-05-28 | 2021-08-20 | 一汽解放汽车有限公司 | Seal gasket and engine |
| CN117450347A (en) * | 2023-12-18 | 2024-01-26 | 山东东信塑胶科技有限公司 | Chemical industry is with compound ABR pipe and sealing connection structure thereof |
| CN117450347B (en) * | 2023-12-18 | 2024-03-19 | 山东东信塑胶科技有限公司 | Chemical industry is with compound ABR pipe and sealing connection structure thereof |
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