CN116380362A - Main control room can stay district boundary bunched cable shutoff sealing performance test device - Google Patents
Main control room can stay district boundary bunched cable shutoff sealing performance test device Download PDFInfo
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- CN116380362A CN116380362A CN202310148462.7A CN202310148462A CN116380362A CN 116380362 A CN116380362 A CN 116380362A CN 202310148462 A CN202310148462 A CN 202310148462A CN 116380362 A CN116380362 A CN 116380362A
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- 238000007789 sealing Methods 0.000 title claims abstract description 49
- 238000011056 performance test Methods 0.000 title claims description 16
- 238000012360 testing method Methods 0.000 claims abstract description 118
- 239000003566 sealing material Substances 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 12
- 238000002474 experimental method Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 description 16
- 230000000694 effects Effects 0.000 description 11
- 229920001296 polysiloxane Polymers 0.000 description 11
- 239000000463 material Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- 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
- G01M3/28—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2838—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for cables
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- 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
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- Monitoring And Testing Of Nuclear Reactors (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a device for testing plugging sealing performance of a bunch of cables at the boundary of a habitable area of a main control room, which is characterized by comprising a test assembly, a detection assembly, a pressurizing assembly, a connecting assembly and a plugging assembly, wherein the cables penetrate through the test assembly, the detection assembly is arranged on the test assembly so as to detect the pressure in the test assembly, the pressurizing assembly is connected with an experiment cavity through the connecting assembly so as to pressurize the test assembly, and the plugging assembly is arranged in the test assembly so as to plug gaps of holes of the cables penetrating through the test assembly. Therefore, the device can detect insufficient and easily generated leakage points in the plugging process of the bunched cable holes in the current nuclear power station, and meanwhile, the device can be used for carrying out multiple test comparison to obtain the type of sealing material to be adopted for plugging the gaps when the cables pass through the holes.
Description
Technical Field
The invention relates to the field of pressure gradient tests of nuclear island area cable holes and ventilation systems, in particular to a device for testing plugging and sealing performance of bunched cables at a habitable area boundary of a main control room.
Background
In the process of executing the negative pressure/positive pressure gradient test of the nuclear island factory building, the holes which are plugged are found to be leaked to different degrees, so that the establishment of positive/negative pressure of the factory building is affected, and the place where the leakage is most serious generally occurs in the holes of the electrical instrument through which the bundled cables pass. The holes are commonly formed in areas where a large number of control cables and power cables penetrate through the periphery of a containment ring corridor, a safety factory building, a nuclear auxiliary factory building, a fuel factory building, a main control room and the like, and the range is wide and the number of the holes is large.
In order to treat the blocking of the holes when the boundary of the factory building is established, ensure the tightness of the blocking, reduce the difficulty of leakage point investigation in the later stage when the pressure gradient test of the nuclear island factory building and the test of master control room leakage and the like are executed, quantitative test is needed to be carried out on the existing blocking process of the bundle of cables before the holes are blocked on site, whether the leakage rate of the holes blocked by adopting the existing blocking process meets the requirement of the pressure gradient test is verified, and the point generating leakage is optimized in advance.
At present, the blocking effect of a bundle of cable holes mainly passes through a whole pressure test of a factory building in the field of nuclear power plants, such as a CTT test (containment performance test) of a reactor factory building, an OCTT test of a reactor ring gallery and a pressure gradient test of each nuclear auxiliary and safety factory building, and is characterized in that the whole pressing is carried out on the boundary of the existing blocking completion, the test pressure is higher, leakage points are found, and then the leakage points are treated one by one. However, for plants or areas where the whole pressure test cannot be performed, such as the main control room area and the peripheral plants, the sealing performance verification cannot be performed by using the pressure test for the boundary plugging effect.
In addition, aiming at the sealing performance verification method of the bunched cable hole plugging material, the plugging material manufacturer mainly applies a drainage bubble method air tightness test to carry out a pressure air tightness test on a single pipeline, and only aims at verifying the sealing performance of the sealing material. However, such holes through various size types of cables for bundles of cables do not allow for quantitative assessment of the leakage.
In order to ensure that the boundary sealing performance can meet the design requirement, the sealing performance of the plugging method of holes penetrating through more cables in the holes needs to be evaluated.
Disclosure of Invention
The invention aims to solve the technical problem of providing a plugging sealing performance test device for bunched cables at the boundary of a residence area of a main control room.
The technical scheme adopted for solving the technical problems is as follows: a main control room can reside in regional boundary bunching cable shutoff sealing performance test device, including test assembly, detection assembly, pressurization assembly, link module and shutoff assembly, the cable wears to locate the said test assembly;
the detection component is arranged on the test component to detect the pressure in the test component;
the pressurizing assembly is connected with the experiment cavity through the connecting assembly so as to pressurize the experiment assembly;
the plugging assembly is arranged in the test assembly to plug a gap of a hole of the test assembly, through which the cable passes.
In some embodiments, the test assembly comprises a blocking area and an inflation area, wherein the blocking area is arranged on two sides of the inflation area, and the blocking assembly is arranged between the blocking area and the inflation area.
In some embodiments, the inflation area is provided with an inflation interface to which the connection assembly is connected, so that the pressurizing assembly pressurizes the inflation area.
In some embodiments, the detection assembly includes a pressure gauge coupled to the inflation region to detect the pressure of the inflation region.
In some embodiments, the pressurization assembly includes an air compressor to pressurize the test assembly.
In some embodiments, the pressure gauge is electrically connected with the air compressor, so as to control the air compressor to stop running when the pressure gauge detects that the set pressure value is reached in the inflation area.
In some embodiments, the connection assembly includes a hose to connect the pressurization assembly and the test assembly.
In some embodiments, the connection assembly further comprises an isolation valve disposed on the hose.
In some embodiments, the air compressor is electrically connected to the isolation valve, so as to control the isolation valve to be closed when the pressure gauge detects that the set pressure value is reached in the inflation area.
In some embodiments, the occlusion assembly includes a sealing grid disposed between the inflation region and the occlusion region to separate the inflation region and the occlusion region.
In some embodiments, the closure assembly further comprises a sealing material that fills in a gap where the cable passes through the test assembly to seal the test assembly.
The implementation of the invention has the following beneficial effects: the device of the embodiment can be used for detecting insufficient and easily-generated leakage points in the plugging process of the bunched cable holes in the current nuclear power station, and meanwhile, the type of sealing material to be adopted for plugging the gaps when the cables pass through the holes can be obtained through multiple test and comparison by using the device of the embodiment.
According to the results of the plugging sealing performance test by using the silicones with different densities for many times, the sealing material with the grade equal to or higher than that of the silicone with the medium density must be used to meet the sealing requirement in hole plugging, and meanwhile, according to the test results of the test, a solution is provided for how to increase the sealing material to wrap the cable. For example, for a bundle of cable holes with a cable bridge, when the positions of the leakage points generated by the bridge are clear, the positions of the leakage points can be treated by using a sealing material, and the sealing effect is re-verified according to the test method, so that the final leakage rate meets the requirement, and therefore, the optimized plugging process obtained by the test device disclosed by the invention is generally adopted as a position with higher requirement on the leakage rate as the whole nuclear island region.
The pressure attenuation test is carried out on the test device, so that the maximum leakage quantity of a single hole is calculated according to the integral leakage curve of a bundle of cable holes under the sealing of medium-density silicone, and data support is provided for the subsequent indoor leakage test evaluation leakage quantity of the main control.
According to the current boundary plugging effect, the sealing effect of the bunched cable holes optimized by the test device is ideal, and positive pressure in the boundary of the main control room is easy to establish.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic structural diagram of a device for testing plugging and sealing performance of a cable bundle at a boundary of a habitable area of a main control room in an embodiment of the invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
Fig. 1 shows a test device for sealing performance of a bundle of cables at a habitable boundary of a main control room in some embodiments of the present invention, which can be used to verify the integrity and sealing performance of a pressure boundary of a nuclear island, and may include a test component 1, a detection component 2, a pressurizing component 3, a connection component 4 and a sealing component 5, where the cables are installed in the test component 1, because for a factory building or a region where an overall pressure test cannot be performed, such as a main control room region and a peripheral factory building, the sealing performance of the boundary sealing effect cannot be verified by using the overall pressure test, and at the same time, it is necessary to quantitatively evaluate the gas leakage amount of a bundle of cables, such as holes penetrating through cables of various sizes, and optimize the existing hole sealing process according to the test result, so that the leakage rate of the sealed bundle of cable holes can meet the sealing performance requirement of the design requirement, and the test device of the present invention can meet the requirement.
The detection component 2 is arranged on the test component 1 and is used for detecting the pressure in the test component 1, the leakage amount of the gas in a period of time is calculated according to the volume of the test component 1 by detecting the change of the pressure value in the test component 1 in a period of time, so that the tightness of the test component 1 is analyzed, if the leakage amount in the same time and the same volume is larger, the tightness is worse, the pressurization component 3 is connected with the test component 1 through the connection component 4, the pressurization component 3 is used for pressurizing the test component 1, and the connection component 4 is used for conveying the gas generated by the pressurization component 3 into the test component 1.
Specifically, the pressurization assembly 3 inflates the test assembly 1 to increase the pressure in the test assembly 1, the tightness of the test assembly 1 is verified through the change of the pressure in the test assembly 1 within a period of time, the connection assembly 4 is used for transmitting the gas generated by the pressurization assembly 3 to the test assembly 1, at this time, one end of the connection assembly 4 is connected with the pressurization assembly 3, the other end is connected with the test assembly 1, the pressurization assembly 3 begins to inflate in operation, the gas flows into the test assembly 1 through the connection assembly 4, and the pressure in the test assembly 1 is gradually increased.
When the pressure in the test assembly 1 reaches the requirement of carrying out the tightness test, the pressurizing assembly 3 stops to aerify to the test assembly 1, the plugging assembly 5 is arranged in the test assembly 1 and is used for plugging gaps generated on the test assembly 1 when a cable passes through the test cavity, the cable is not completely attached to holes of the test assembly 1, through which the cable passes, when the cable passes through the test assembly 1, a certain gap exists, and therefore the plugging assembly 5 is required to plug the holes, so that the tightness of the test assembly 1 is ensured, meanwhile, the plugging effect of the plugging assembly 5 can be evaluated, and when the plugging effect of the plugging assembly 5 is better, the tightness of the test assembly 1 is better.
Therefore, the device of the embodiment can detect insufficient and easily generated leakage points in the plugging process of the bunched cable holes in the current nuclear power station, and meanwhile, the type of sealing material to be adopted for plugging the gaps when the cable passes through the holes can be obtained through multiple test and comparison by using the device of the embodiment.
The test assembly 1 comprises a plugging zone 11 and an inflation zone 12 in some embodiments, that means that the test assembly is divided into the plugging zone 11 and the inflation zone 12, the plugging zone 11 is arranged at two sides of the inflation zone 12, a plugging assembly 5 is arranged between the plugging zone 11 and the inflation zone 12, specifically, the plugging assembly 5 comprises a sealing grid 51 and a sealing material, the sealing grid 51 is arranged between the plugging zone 11 and the inflation zone 12, and the plugging zone 11 and the inflation zone 12 are used for carrying out the plugging performance test smoothly.
Meanwhile, the cable sequentially passes through the first blocking area 11, the gas charging area 12 and the second blocking area 11, passes through the boundary between the blocking area 11 and the outside and the sealing grating 51 between the blocking area 11 and the gas charging area 12, and the hole on the boundary and the sealing grating 51 for the cable to pass through is not completely attached to the cable, and gaps exist between the boundary and the cable, so that blocking materials are required to block the gaps, and the tightness of the test assembly 1 is ensured.
Further, in this embodiment, the plugging material is silicone, and is divided into low-density silicone and medium-density silicone, and the two densities of silicone are used to plug the gap between the hole and the cable, so as to verify the sealing effect of the two densities of silicone, in addition, in order to accurately determine the specific position of the gas leakage point, the plugging area 11 is further filled with liquid, when the plugging performance test is performed, if there is a place that is not completely plugged, the liquid flows to the place under the effect of pressure, then seeps out of the test component 1, at this time, whether the test component leaks can be determined according to the specific seepage of the liquid, and at the same time, the specific leakage point that causes the pressure in the test component 1 to drop can be found, so as to improve the sealing performance of the test component 1, reduce the leakage amount of the gas, and finally, the whole leakage effect reaches 30Pa pressure without leakage, that is, the pressure value in the test component is stable at 30Pa.
Further, in some embodiments, the inflation area 12 is provided with an inflation interface 121, the inflation interface 121 is used for connecting the connection assembly 4, when the connection assembly 4 is connected to the inflation interface 121 and the pressurization assembly 3, gas generated by the pressurization assembly 3 can enter the inflation area 12 through the connection assembly 4 and the inflation interface 121, so that the pressure in the inflation area 12 is increased, in this embodiment, the pressure in the inflation area 12 needs to be increased to 950Pa, and the plugging sealing performance test is performed under this pressure condition, so that the pressurization assembly 3 needs to continuously pressurize the inflation area 12, so that the pressure in the inflation area 12 reaches 950Pa, and then the plugging sealing performance test is performed.
The detection assembly 2 in some embodiments comprises a pressure gauge 21, the pressure gauge 21 is connected with the charging area 12 and is used for detecting the pressure of the charging area 12, the leakage gas quantity is calculated according to the pressure change in a period of time, the sealing performance of the test assembly 1 is obtained, the smaller the leakage gas quantity is, the better the sealing performance of the test assembly 1 is, and in the embodiment, the pressure gauge 21 is a high-precision digital pressure gauge 21, so that the pressure change value in the charging area 12 can be measured more accurately.
Specifically, according to the change relation between the gas volume and the pressure in the standard state, the gas leakage Q passing through the blocking in a unit time can be calculated by measuring the pressure drop in the gas charging area 12 in a certain time, and the specific calculation process is shown in the following formula:
Q＝Ve×(ΔP/1.013×10 5 )×(60/T)
leakage rate in Q-unit time mL/(min. Pa)
Ve-compressed air charging zone 12 volume mL
Delta P-variation Pa of internal pressure per application
T-test time min
The pressurizing assembly 3 in some embodiments comprises an air compressor 31 for pressurizing the test assembly 1 to increase the pressure within the test assembly 1, in particular, the air compressor 31 is connected to the inflation area 12 via the connection assembly 4, and then the air compressor 31 is operated to generate a gas which flows through the connection assembly 4 and the inflation interface 121 into the inflation area 12. In this way, the air compressor 31 is stopped when the pressure gauge 21 detects that the pressure value of the air charging area 12 is 950Pa in this embodiment, and the air charging of the air charging area 12 is completed.
Further, the pressure gauge 21 is electrically connected with the air compressor 31, when the pressure gauge 21 detects that the set pressure value is reached in the air charging area 12, the pressure gauge 21 sends a signal to the air compressor 31 to control the air compressor 31 to stop running, so that a stable pressure value is reached in the air charging area 12, the accuracy of a plugging sealing performance test is ensured, and the sealing performance of two silicones with different densities can be accurately judged.
The connecting component 4 comprises a hose 41 in some embodiments, and is used for connecting the pressurizing component 3 and the testing component 1, specifically, one end of the hose 41 is connected with the inflation interface 121, the other end is connected with the air compressor 31, so that gas can flow from the air compressor 31 to the inflation area 12, the pressure in the inflation area 12 is increased, the plugging sealing performance test is performed, meanwhile, the placing position of the air compressor 31 can be flexibly adjusted by adopting the hose 41 to connect the inflation area 12 and the air compressor 31, because the hose 41 is made of the material characteristics, the hose 41 can be bent or compressed and extended to a certain extent, and the air compressor 31 does not need to worry about whether the placing position can influence the hose 41 or not when being placed, so that the test is more convenient, and the placing problem of equipment is not excessively worried.
Further, the connection assembly 4 further includes an isolation valve 42 in some embodiments, where the isolation valve 42 is disposed on the hose 41 and is used for separating the air charging area 12 and the air compressor 31, that is, when the air compressor 31 completes charging and then the pressure value of the air charging area 12 meets the experimental requirement, the air compressor 31 stops running at this time, and if the air charging area 12 and the air compressor 31 are not separated, it is possible that the air in the air charging area 12 will flow back into the air compressor 31, so that the pressure in the air charging area 12 is reduced, and accuracy of the plugging sealing performance test is affected.
Therefore, in order to prevent the pressure of the air charging area 12 from being reduced due to the backflow of the air in the air charging area 12, an isolation valve 42 is arranged on a hose 41 connecting the air charging area 12 and the air compressor 31, when the air charging is performed, the isolation valve 42 is opened to enable the air to flow from the air compressor 31 to the air charging area 12, and when the air charging is completed, the isolation valve 42 is closed to prevent the air in the air charging area 12 from flowing back into the air compressor 31.
Meanwhile, the air compressor 31 is electrically connected with the isolation valve 42, so that when the pressure gauge 21 detects that the set pressure value is reached in the air charging area 12, the pressure gauge 21 sends a signal to the isolation valve 42 to control the isolation valve 42 to be closed, and gas in the air charging area 12 is prevented from flowing back to the air compressor 31.
When the device is used for plugging sealing performance test, a low-density silicone plugging cable is firstly used for plugging a gap formed when passing through a test cavity, then the air compressor 31 is opened, the isolation valve 42 is opened, the air compressor 31 is inflated to the inflation area 12, when the pressure gauge 21 detects that the pressure value in the inflation area 12 is 950Pa, the air compressor 31 stops running, at the moment, the isolation valve 42 is closed, then a period of time is reserved, the value of the pressure gauge 21 is read again, and therefore the leaked air quantity is calculated.
And then, the gap formed when the medium-density silicone plugging cable passes through the test assembly 1 is used, the subsequent steps are repeated to obtain the leaked air quantity, the value of the leaked air quantity of the two tests is compared, and the sealing performance of the two sealing materials is judged.
It will be appreciated that the above technical features may be used in any combination without limitation.
The foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present invention and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the invention.
Claims (11)
1. The device for testing the plugging sealing performance of the bunched cables at the boundary of the habitable area of the main control room is characterized by comprising a testing component (1), a detecting component (2), a pressurizing component (3), a connecting component (4) and a plugging component (5), wherein the cables penetrate through the testing component (1);
the detection assembly (2) is mounted on the test assembly (1) to detect the pressure in the test assembly (1);
the pressurizing assembly (3) is connected with the test assembly (1) through the connecting assembly (4) so as to pressurize the test assembly (1);
the plugging assembly (5) is arranged in the test assembly (1) to plug a gap of a hole of the test assembly (1) through which the cable passes.
2. The device for testing plugging sealing performance of the cable bundles at the boundary of the residence zone of the main control room according to claim 1, wherein the test assembly (1) comprises a plugging zone (11) and an inflation zone (12), the plugging zone (11) is arranged at two sides of the inflation zone (12), and a plugging assembly (5) is arranged between the plugging zone (11) and the inflation zone (12).
3. The device for testing plugging and sealing performance of bundled cables at the boundary of a residence area of a main control room according to claim 2, wherein the inflation area (12) is provided with an inflation interface (121) for connecting the connection assembly (4) so as to enable the pressurizing assembly (3) to pressurize the inflation area (12).
4. The master control room habitability area boundary bundling cable plugging sealing performance test device according to claim 2, wherein the detection assembly (2) comprises a pressure gauge (21), and the pressure gauge (21) is connected with the inflation area (12) to detect the pressure of the inflation area (12).
5. The master control room habitability area boundary bundling cable plugging sealing performance testing device according to claim 4, wherein the pressurizing assembly (3) includes an air compressor (31) to pressurize the testing assembly (1).
6. The device for testing plugging and sealing performance of a cable bundle at the boundary of a residence area of a main control room according to claim 5, wherein the pressure gauge (21) is electrically connected with the air compressor (31) so as to control the air compressor (31) to stop running when the pressure gauge (21) detects that the set pressure value is reached in the inflation area (12).
7. The device for testing plugging and sealing performance of a cable bundle at the boundary of a residence area in a main control room according to claim 5, wherein the connecting assembly (4) comprises a hose (41) for connecting the pressurizing assembly (3) and the testing assembly (1).
8. The master control room habitability area boundary strapped-cable seal performance test device of claim 7, wherein the connection assembly (4) further includes an isolation valve (42), the isolation valve (42) being disposed on the hose (41).
9. The device for testing plugging and sealing performance of a cable bundle at the boundary of a residence area of a main control room according to claim 8, wherein the air compressor (31) is electrically connected with the isolation valve (42) so as to control the isolation valve (42) to be closed when the pressure gauge (21) detects that the set pressure value is reached in the inflation area (12).
10. The master control room habitability area boundary bunched cable seal property test device of claim 2, wherein the seal assembly (5) includes a seal grid (51), the seal grid (51) being disposed between the inflation area (12) and the seal area (11) to separate the inflation area (12) and the seal area (11).
11. The master control room habitability area boundary bundle cable block seal performance testing device according to claim 10, wherein the block assembly (5) further comprises a sealing material that fills in a slit where the cable passes through the test assembly (1) to seal the test assembly (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310148462.7A CN116380362A (en) | 2023-02-13 | 2023-02-13 | Main control room can stay district boundary bunched cable shutoff sealing performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310148462.7A CN116380362A (en) | 2023-02-13 | 2023-02-13 | Main control room can stay district boundary bunched cable shutoff sealing performance test device |
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| Publication Number | Publication Date |
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| CN116380362A true CN116380362A (en) | 2023-07-04 |
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|---|---|---|---|
| CN202310148462.7A Pending CN116380362A (en) | 2023-02-13 | 2023-02-13 | Main control room can stay district boundary bunched cable shutoff sealing performance test device |
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| CN (1) | CN116380362A (en) |
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- 2023-02-13 CN CN202310148462.7A patent/CN116380362A/en active Pending
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