CN116499651A - Sealed cylinder barrel device - Google Patents
Sealed cylinder barrel device Download PDFInfo
- Publication number
- CN116499651A CN116499651A CN202310266973.9A CN202310266973A CN116499651A CN 116499651 A CN116499651 A CN 116499651A CN 202310266973 A CN202310266973 A CN 202310266973A CN 116499651 A CN116499651 A CN 116499651A
- Authority
- CN
- China
- Prior art keywords
- sealing flange
- sealing
- spacer bush
- cavity
- cylinder device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 123
- 125000006850 spacer group Chemical group 0.000 claims abstract description 59
- 238000012360 testing method Methods 0.000 claims abstract description 55
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 5
- 239000011737 fluorine Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 230000007547 defect Effects 0.000 description 6
- 239000012857 radioactive material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a sealed cylinder barrel device, which comprises a first sealing flange, a second sealing flange, a cylinder barrel main body, a first spacer bush, a second spacer bush, a test piece to be tested and a gas flowmeter; the cylinder barrel main body is arranged between the first sealing flange and the second sealing flange, and the first sealing flange and the second sealing flange are oppositely arranged and are connected through the fastening component; the first spacer bush and the second spacer bush are hollow, and the first spacer bush, the test piece to be tested and the second spacer bush are sequentially arranged in the cylinder barrel main body to form a first cavity and a second cavity; pressure gas enters the first cavity through the first sealing flange; the gas flowmeter is connected with the second cavity through the second sealing flange so as to detect whether pressure gas exists in the second cavity. The invention realizes the sealing performance of the steel plate of the test containment by using the sealing cylinder device.
Description
Technical Field
The invention relates to the field of nuclear power plant protection equipment, in particular to a sealed cylinder barrel device.
Background
The containment, the nuclear reactor containment, is the outermost building of the pressurized water reactor that serves to control and limit the diffusion of radioactive materials out of the reactor to protect the public from the radioactive materials. The containment is the last barrier of nuclear power plant to prevent radioactive material leakage, and its gas tightness is of great importance to personnel dose control, and the steel sheet is as the important component part of containment, and the leakproofness of test steel sheet can provide the reference for testing the leakproofness of whole containment.
Therefore, how to test the sealing performance of the steel plate of the containment vessel is a technical problem that a person skilled in the art needs to solve at present.
Disclosure of Invention
The object of the invention is therefore to provide a sealed cylinder device for testing the sealing properties of steel plates of a containment vessel
In order to achieve the above object, the present invention provides the following technical solutions:
a sealed cylinder barrel device comprises a first sealing flange, a second sealing flange, a cylinder barrel main body, a first spacer, a second spacer, a test piece to be tested and a gas flowmeter;
the cylinder barrel main body is arranged between the first sealing flange and the second sealing flange, and the first sealing flange and the second sealing flange are oppositely arranged and are connected through the fastening component;
the first spacer bush and the second spacer bush are hollow, and the first spacer bush, the test piece to be tested and the second spacer bush are sequentially arranged in the cylinder barrel main body to form a first cavity and a second cavity;
pressure gas enters the first cavity through the first sealing flange; the gas flowmeter is connected with the second cavity through the second sealing flange so as to detect whether pressure gas exists in the second cavity.
Optionally, in the sealed cylinder device described above, the first sealing flange is provided with an air inlet hole, and the pressure gas enters the first cavity through an air inlet pipe that is communicated with the air inlet hole; and/or the number of the groups of groups,
the second sealing flange is provided with an air outlet hole, and the gas flowmeter is connected with the second cavity through an air outlet pipe communicated with the air outlet hole so as to detect whether pressure gas exists in the second cavity.
Optionally, in the sealed cylinder device described above, a spacer is provided between the test piece to be tested and the second spacer.
Alternatively, in the above sealed cylinder device, the number of shims is two, and the two shims are arranged in superposition.
Optionally, in the sealed cylinder device, a first groove is formed on a connection surface of the first spacer bush and the test piece to be tested, and a first sealing ring is arranged in the first groove.
Optionally, in the sealed cylinder device described above, the first sealing flange and/or the second sealing flange is provided with a second groove, and a second sealing ring is provided in the second groove to fill a gap between the first sealing flange and/or the second sealing flange and the cylinder body; and/or the number of the groups of groups,
the first spacer bush is provided with a second groove, and a second sealing ring is arranged in the second groove so as to fill a gap between the first spacer bush and the cylinder barrel main body.
Optionally, in the sealed cylinder device described above, the outer diameter of the second sealing ring is larger than the outer diameter of the first sealing ring; and/or the number of the groups of groups,
the first sealing ring and the second sealing ring are fluorine rubber O-shaped sealing rings.
Optionally, in the sealed cylinder device described above, the fastening assembly includes a support shaft and a fastening nut screw-fitted with the support shaft, and the first sealing flange and the second sealing flange are provided with fixing holes penetrating the support shaft.
Optionally, in the sealed cylinder device described above, the number of support shafts is four.
Optionally, in the sealed cylinder device, the sealed cylinder device further includes a support seat disposed at an outer side of the cylinder body, the support seat is provided with a through hole, and the support shaft passes through the through hole to connect the first sealing flange and the second sealing flange.
The cylinder barrel body is arranged between the first sealing flange and the second sealing flange, and the first sealing flange and the second sealing flange are connected and locked through a fastening assembly, so that the first spacer bush, the test piece to be tested and the second spacer bush in the cylinder barrel body are tightly pressed to form a sealing space, and gas leakage is prevented. Pressure gas enters the first cavity through the first sealing flange, and if the gas flowmeter connected with the second cavity has an indication, the defect of the test piece to be tested is indicated; and if the gas flowmeter connected with the second cavity does not detect the pressure gas, the tightness of the test piece to be tested is good.
The sealed cylinder barrel device provided by the invention supports testing of the steel plates in the local area in the containment, is easy to replace different steel plates, and can meet the diversified requirements of the containment on the steel plate tightness test, thereby guaranteeing the integrity and safety of the containment structure; the fund and time cost of the tightness test is reduced, the complexity of the tightness test is reduced, and the operation is convenient. The invention provides a feasible experimental approach for guaranteeing the structural integrity of the containment and for exploring the influence mechanism of the structural integrity of the steel plate on the containment tightness.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a sealed cylinder device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first sealing flange according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a first sealing flange according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a first spacer disclosed in an embodiment of the present invention;
FIG. 5 is a schematic view of a gasket according to an embodiment of the present invention;
FIG. 6 is a schematic view of a second sealing flange according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a second sealing flange according to an embodiment of the present invention;
FIG. 8 is an exploded view of a sealed cylinder device according to an embodiment of the present invention;
FIG. 9 is an overall block diagram of a sealed cylinder device according to an embodiment of the present invention;
the meaning of the various reference numerals in fig. 1 to 9 is as follows:
100 is a cylinder barrel body;
201 is a first sealing flange; 2011 is an air inlet hole; 2012 is a fixing hole; 202 is a second sealing flange; 2021 is an air outlet; 2022 is a spare hole; 203 is a first cavity; 204 is a second cavity;
301 is a first spacer; 302 is a second spacer;
400 is a test piece to be tested;
500 is a gasket;
601 is a first seal ring; 602 is a second seal ring;
701 is a supporting shaft; 702 is an air inlet pipe; 703 is an air outlet pipe; 704 is a supporting seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 9 in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without novel efforts, are intended to fall within the scope of this invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top surface", "bottom surface", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limitations of the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the sealed cylinder device disclosed by the invention comprises a first sealing flange 201, a second sealing flange 202, a cylinder body 100, a first spacer 301, a second spacer 302, a test piece 400 to be tested and a gas flowmeter; the cylinder barrel main body 100 is arranged between a first sealing flange 201 and a second sealing flange 202, and the first sealing flange 201 and the second sealing flange 202 are oppositely arranged and connected through a fastening assembly; the first spacer bush 301 and the second spacer bush 302 are hollow, and the first spacer bush 301, the test piece 400 to be tested and the second spacer bush 302 are sequentially arranged in the cylinder barrel main body 100 to form a first cavity 203 and a second cavity 204; pressurized gas enters the first cavity 203 through the first sealing flange 201; the gas meter is connected to the second chamber 204 via a second sealing flange 202 to detect the presence of pressurized gas in the second chamber 204.
The sealed cylinder device provided by the invention comprises a first sealing flange 201, a second sealing flange 202, a cylinder body 100, a first spacer 301, a second spacer 302, a test piece 400 to be tested and a gas flowmeter, wherein the cylinder body 100 is arranged between the first sealing flange 201 and the second sealing flange 202, and the first sealing flange 201 and the second sealing flange 202 are connected and locked through a fastening assembly, so that the first spacer 301, the test piece 400 to be tested and the second spacer 302 which are positioned in the cylinder body 100 are tightly pressed to form a sealing space, and gas leakage is prevented. Pressure gas enters the first cavity 203 through the first sealing flange 201, and if the gas flowmeter connected with the second cavity 204 has an indication, the defect of the test piece 400 to be tested is indicated; if the gas flow meter connected to the second cavity 204 does not detect the pressure gas, the tightness of the test piece 400 to be tested is good.
The test piece 400 to be tested is a steel plate having the same specification as the steel plate in the containment vessel. Defects that may be present in the steel sheet are typically self-contained defects such as welds or inclusions, or fatigue cracks that occur in the steel sheet under pressure. And the pressure of the first chamber 203 in the sealed cylinder device needs to simulate the pressure in the actual containment. In general, the maximum pressure in the containment vessel at the time of the pressure test was 0.58MPa, so the maximum pressure of the pressure gas was set to 0.58MPa in the present invention.
The sealed cylinder device provided by the invention supports the test piece 400 to be tested in a local area in the test containment, and is easy to replace different test pieces 400 to be tested, so that the diversified requirements of the containment on the tightness test of the test piece 400 to be tested can be met, and the integrity and safety of the containment structure are ensured; the fund and time cost of the tightness test is reduced, the complexity of the tightness test is reduced, and the operation is convenient. The invention provides a feasible experimental approach for guaranteeing the structural integrity of the containment, and for ascertaining the influence mechanism of the structural integrity of the test piece 400 to be tested on the containment tightness.
As shown in fig. 2 and 3, an air inlet 2011 is formed at the center of the first sealing flange 201. The air inlet pipe 702 is communicated with the first cavity 203 through an air inlet 2011, and pressure air enters the first cavity 203 through the air inlet pipe 702. In order to avoid leakage of pressure gas from the gap between the air inlet pipe 702 and the air inlet hole 2011, a sealing ring is sleeved outside the air inlet pipe 702 so as to fill the gap between the air inlet pipe 702 and the air inlet hole 2011 and ensure the air tightness of the first cavity 203.
As shown in fig. 6 and 7, the second sealing flange 202 is provided with an air outlet hole 2021, the air outlet pipe 703 is communicated with the second cavity 204 through the air outlet hole 2021, and in order to avoid leakage of pressure gas from a gap between the air outlet pipe 703 and the air outlet hole 2021, a sealing ring is sleeved outside the air outlet pipe 703 to fill the gap between the air inlet pipe 702 and the air inlet hole 2011.
If the test piece 400 to be tested has a defect, the pressure gas in the first cavity 203 reaches the second cavity 204 through the defect of the test piece 400 to be tested, and then flows through the gas flowmeter through the gas outlet pipe 703, so that the gas flowmeter generates an indication, and the tightness test of the test piece 400 to be tested is completed. The second sealing flange 202 is further provided with a spare opening 2022, so that the sealing cylinder device meets more test requirements, for example, the strain of the test piece 400 to be tested is measured in a test, and the strain gauge wiring can be arranged through the spare opening 2022.
The test piece 400 to be tested is arranged between the first spacer bush 301 and the second spacer bush 302, and in order to ensure the tightness between the test piece 400 to be tested and the first spacer bush 301 and the second spacer bush 302, a gasket 500 is arranged between the test piece 400 to be tested and the second spacer bush 302, and the shape of the gasket 500 is shown in fig. 5.
Further, in order to make the test piece 400 to be tested fully fit with the first spacer 301 and the second spacer 302, the number of the spacers 500 is two, and the two spacers 500 are overlapped.
As shown in fig. 4, a first groove is formed on the connection surface between the first spacer 301 and the test piece 400 to be tested, and a first sealing ring 601 is disposed in the first groove to fill a gap between the first spacer 301 and the test piece 400 to be tested, so as to ensure the air tightness of the first cavity 203, and avoid leakage of pressure gas from the gap between the test piece 400 to be tested and the first spacer 301, thereby ensuring the accuracy of the tightness measurement of the test piece 400 to be tested. It should be noted that the size of the first groove is adapted to the size of the first sealing ring 601 to ensure the air tightness of the first cavity 203.
Further, as shown in fig. 3, the first sealing flange 201 is provided with a second groove, and a second sealing ring 602 is disposed in the second groove to fill a gap between the first sealing flange 201 and the cylinder body 100, so as to improve the air tightness of the whole device. Also, as shown in fig. 4 and 7, a second groove is formed on the contact surface of the first spacer 301 and the second sealing flange 202 with the cylinder body 100, and the second seal ring 602 is disposed in the second groove. Because the second chamber 204 is not pressurized, no sealing is required between the second spacer 302 and the cylinder body 100.
As fluorine atoms are introduced into the fluorine rubber serving as a raw material of the sealing ring, the fluorine rubber has good heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance. In one embodiment of the present invention, therefore, a fluorine rubber O-ring is used as the first seal 601 and the second seal 602. And the outer diameter of the second seal ring 602 is set to be larger than the outer diameter of the first seal ring 601. The first seal 601 may be provided with an outer diameter of 70mm and the second seal 602 with an outer diameter of 80mm.
The first sealing flange 201 and the second sealing flange 202 are oppositely arranged and are connected through a fastening assembly, and in order to ensure that the connection between the first sealing flange 201 and the second sealing flange 202 is tight, the fastening assembly comprises a support shaft 701 and a fastening nut in threaded fit with the support shaft 701, and the first sealing flange 201 and the second sealing flange 202 are provided with fixing holes 2012 penetrating through the support shaft 701. The support shaft 701 passes through the fixing hole 2012 to be in threaded fit with the fastening nut, connects and fastens the first sealing flange 201 and the second sealing flange 202, and tightens the fastening nut to compress the first spacer 301, the test piece 400 to be tested and the second spacer 302, thereby ensuring the air tightness of the whole device.
Further, in order to make the connection of the first sealing flange 201 and the second sealing flange 202 more secure, the number of support shafts 701 is set to four.
To optimize the above solution, a support seat 704 is provided on the outside of the cylinder body 100, the support seat 704 being located between the first sealing flange 201 and the second sealing flange 202. The support shaft 701 passes through the through hole of the support seat 704 to connect the first sealing flange 201 and the second sealing flange 202, so that the connection between the first sealing flange 201 and the second sealing flange 202 is more stable, and the stability of the whole device is improved.
It should be noted that the present invention may be used in the field of nuclear power plant protection equipment or other fields. Other fields are any field other than the field of nuclear power plant protection equipment. The above is only an example and does not limit the field of application of the sealed cylinder device provided by the invention.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The sealing cylinder device is characterized by comprising a first sealing flange (201), a second sealing flange (202), a cylinder body (100), a first spacer bush (301), a second spacer bush (302), a test piece (400) to be tested and a gas flowmeter;
the cylinder barrel main body (100) is arranged between the first sealing flange (201) and the second sealing flange (202), and the first sealing flange (201) and the second sealing flange (202) are oppositely arranged and are connected through a fastening component;
the first spacer bush (301) and the second spacer bush (302) are hollow, and the first spacer bush (301), the test piece (400) to be tested and the second spacer bush (302) are sequentially arranged in the cylinder barrel main body (100) to form a first cavity (203) and a second cavity (204);
-pressure gas enters the first cavity (203) through the first sealing flange (201); the gas flow meter is connected to the second chamber (204) via the second sealing flange (202) to detect the presence of the pressure gas in the second chamber (204).
2. The sealed cylinder device according to claim 1, characterized in that the first sealing flange (201) is provided with an air inlet hole (2011), and that pressurized air enters the first chamber (203) through an air inlet pipe (702) communicating with the air inlet hole (2011); and/or the number of the groups of groups,
the second sealing flange (202) is provided with an air outlet hole (2021), and the air flowmeter is connected with the second cavity (204) through an air outlet pipe (703) communicated with the air outlet hole (2021) so as to detect whether pressure air exists in the second cavity (204).
3. A sealed cylinder device according to claim 1, characterized in that a spacer (500) is arranged between the test piece (400) to be tested and the second spacer (302).
4. A sealed cylinder device according to claim 3, characterized in that the number of shims (500) is two, two shims (500) being arranged in superposition.
5. The sealed cylinder device according to claim 1, characterized in that the connection surface of the first spacer bush (301) and the test piece (400) to be tested is provided with a first groove, in which a first sealing ring (601) is arranged.
6. The sealed cylinder device according to claim 5, characterized in that the first sealing flange (201) and/or the second sealing flange (202) are provided with a second groove, in which a second sealing ring (602) is arranged to fill the gap between the first sealing flange (201) and/or the second sealing flange (202) and the cylinder body (100); and/or the number of the groups of groups,
the first spacer bush (301) is provided with a second groove, and a second sealing ring (602) is arranged in the second groove so as to fill a gap between the first spacer bush (301) and the cylinder barrel main body (100).
7. The sealed cylinder device according to claim 6, characterized in that the outer diameter of the second sealing ring (602) is larger than the outer diameter of the first sealing ring (601); and/or the number of the groups of groups,
the first sealing ring (601) and the second sealing ring (602) are fluorine rubber O-shaped sealing rings.
8. The sealed cylinder device according to claim 1, characterized in that the fastening assembly comprises a support shaft (701) and a fastening nut in threaded engagement with the support shaft (701), the first sealing flange (201) and the second sealing flange (202) being provided with a fixing hole through the support shaft (701).
9. Sealed cylinder device according to claim 8, characterized in that the number of support shafts (701) is four.
10. The sealed cylinder device as claimed in claim 8, further comprising a support seat (704) arranged outside the cylinder body (100), the support seat (704) being provided with a through hole through which the support shaft (701) passes to connect the first sealing flange (201) and the second sealing flange (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310266973.9A CN116499651A (en) | 2023-03-14 | 2023-03-14 | Sealed cylinder barrel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310266973.9A CN116499651A (en) | 2023-03-14 | 2023-03-14 | Sealed cylinder barrel device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116499651A true CN116499651A (en) | 2023-07-28 |
Family
ID=87319154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310266973.9A Pending CN116499651A (en) | 2023-03-14 | 2023-03-14 | Sealed cylinder barrel device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116499651A (en) |
-
2023
- 2023-03-14 CN CN202310266973.9A patent/CN116499651A/en active Pending
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