CN117782469A - High-temperature valve platform test device and method - Google Patents
High-temperature valve platform test device and method Download PDFInfo
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- CN117782469A CN117782469A CN202311750993.XA CN202311750993A CN117782469A CN 117782469 A CN117782469 A CN 117782469A CN 202311750993 A CN202311750993 A CN 202311750993A CN 117782469 A CN117782469 A CN 117782469A
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- 238000012360 testing method Methods 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000010998 test method Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The application discloses a high-temperature valve platform test device and a high-temperature valve platform test method, and relates to the technical field of diesel engines. High temperature valve platform test device includes: an air supply unit; the feeding port of the pressurizing unit is communicated with the air supply unit; the feeding hole of the heating unit is communicated with the discharging hole of the pressurizing unit; the feed inlet of the sealing test unit is communicated with the feed inlet of the pressurizing unit; the first butterfly valve is arranged between the feed inlet of the sealing test unit and the discharge outlet of the air supply unit; the testing station is used for installing the high-temperature valve to be tested so that the high-temperature valve to be tested is respectively communicated with the feed inlet of the sealing testing unit and the discharge outlet of the heating unit. In this way, the environment of the diesel engine is simulated through the pressurizing unit and the heating unit, the high-temperature valve to be tested is installed at the testing station, and the tightness of the high-temperature valve to be tested is tested through the sealing testing unit.
Description
Technical Field
The application relates to the technical field of diesel engines, in particular to a high-temperature valve platform test device and a high-temperature valve platform test method.
Background
The high-temperature valve is used as a core part of an adjustable supercharging control system in a marine diesel engine, and the performance of the high-temperature valve directly influences the flow and energy of gas in an air inlet and exhaust pipeline, so that the efficiency of a turbocharger and the performance of the diesel engine are influenced. Therefore, in order to ensure performance metrics of a diesel engine, the sealing level of the high temperature valve at high temperature must ensure that the turbocharger does not idle and the energy loss cannot be excessive. For this reason, a bench test is required for the high temperature valve to check the tightness of the high temperature valve.
However, the conventional pressure test is mostly adopted in the conventional platform test of the high-temperature valve, and the tightness of the high-temperature valve in the high-temperature and high-pressure environment cannot be checked.
Disclosure of Invention
The embodiment of the application provides a high-temperature valve platform test device, which simulates the environment of a diesel engine through a pressurizing unit and a heating unit, installs a high-temperature valve to be tested at a test station, tests the tightness of the high-temperature valve to be tested through a sealing test unit, and solves the problem that the platform test in the prior art mostly adopts a conventional pressure test and cannot check the tightness of the high-temperature valve under the high-temperature and high-pressure environment; the embodiment of the application also provides a high-temperature valve platform test method.
The embodiment of the application provides a high temperature valve platform test device, include:
an air supply unit;
the feeding port of the pressurizing unit is communicated with the air supply unit;
the feed inlet of the heating unit is communicated with the discharge outlet of the pressurizing unit;
the feed inlet of the sealing test unit is communicated with the discharge outlet of the heating unit, and the feed inlet of the sealing test unit is communicated with the feed inlet of the pressurizing unit;
the first butterfly valve is arranged between the feed inlet of the sealing test unit and the discharge outlet of the air supply unit;
the testing station is used for installing a high-temperature valve to be tested, so that the high-temperature valve to be tested is respectively communicated with the feed inlet of the sealing testing unit and the discharge outlet of the heating unit.
In some embodiments, the air supply unit includes:
a booster pump;
the first air storage tank is communicated with the booster pump;
the second butterfly valve is arranged between the discharge port of the first air storage tank and the feed inlet of the pressurizing unit.
In some embodiments, the seal testing unit comprises:
the feeding port of the second air storage tank is communicated with the discharging port of the heating unit;
the pressure relief valve is arranged between the feed inlet of the second air storage tank and the test station;
and the third butterfly valve is arranged between the pressure relief valve and the testing station.
In some embodiments, the seal testing unit further comprises a pressure testing subunit for detecting pressure within the second air reservoir.
In some embodiments, the heating unit includes a plurality of heat sources in communication in sequence.
In some embodiments, further comprising:
and a plurality of first temperature sensors, one of which is arranged in each heat source.
In some embodiments, further comprising:
the second temperature sensor is arranged between the discharge hole of the heating unit and the testing station.
In some embodiments, further comprising:
the first pressure sensor is arranged between the discharge port of the pressurizing unit and the feed port of the heating unit.
In some embodiments, further comprising:
the second pressure sensor is arranged between the discharge hole of the heating unit and the testing station.
Correspondingly, the embodiment of the application also provides a high-temperature valve platform test method, which comprises the following steps:
controlling a gas supply unit to supply gas;
controlling a pressurizing unit to pressurize the gas;
controlling a heating unit to heat the gas;
the first butterfly valve, the second butterfly valve, the third butterfly valve and the high-temperature valve to be tested are controlled to be opened and closed, so that test working conditions are realized;
and controlling a sealing test unit to test the tightness of the high-temperature valve to be tested based on the test working condition.
In some embodiments, controlling the opening and closing of the first butterfly valve and the high temperature valve to be tested, implementing a test condition, including:
and closing the third butterfly valve, opening the first butterfly valve and the second butterfly valve, and enabling the gas to pass through the gas supply unit, the pressurizing unit, the heating unit and the high-temperature valve to be tested in sequence to realize an internal circulation working condition.
In some embodiments, the first butterfly valve and the high temperature valve to be tested are controlled to be opened and closed, so as to realize test working conditions, and the method further comprises:
and opening the second butterfly valve and the third butterfly valve, closing the first butterfly valve and the high-temperature valve to be tested, and enabling the gas to pass through the gas supply unit, the pressurizing unit and the heating unit in sequence and then to be stable and motionless, so as to realize a closed working condition.
In some embodiments, based on the test conditions, controlling a seal test unit to test the tightness of the high temperature valve to be tested includes:
controlling a second gas storage tank to receive the gas based on the test working condition;
and controlling a pressure testing subunit to test the pressure in the second air storage tank so as to test the tightness of the high-temperature valve to be tested.
Compared with the prior art, the high temperature valve platform test device of this application embodiment includes: an air supply unit; the feeding port of the pressurizing unit is communicated with the air supply unit; the feeding hole of the heating unit is communicated with the discharging hole of the pressurizing unit; the feed inlet of the sealing test unit is communicated with the feed inlet of the pressurizing unit; the first butterfly valve is arranged between the feed inlet of the sealing test unit and the discharge outlet of the air supply unit; the testing station is used for installing the high-temperature valve to be tested so that the high-temperature valve to be tested is respectively communicated with the feed inlet of the sealing testing unit and the discharge outlet of the heating unit. Therefore, the environment of the diesel engine is simulated through the pressurizing unit and the heating unit, the high-temperature valve to be tested is installed at the test station, the tightness of the high-temperature valve to be tested is tested through the sealing test unit, and the problem that the tightness of the high-temperature valve in the high-temperature and high-pressure environment cannot be checked due to the fact that the conventional pressure test is adopted in the platform test in the prior art is solved.
It can be appreciated that compared with the prior art, the high-temperature valve platform test method provided by the embodiment of the application has all the technical features and beneficial effects of the high-temperature valve platform test device, and is not repeated herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, 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 schematic structural diagram of a high-temperature valve platform test device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an air supply unit in a high-temperature valve platform test device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a seal testing unit in a high-temperature valve platform testing device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a heating unit of a high-temperature valve platform test device according to an embodiment of the present application.
Reference numerals: 100-an air supply unit; 110-a booster pump; 120-a first air storage tank; 130-a second butterfly valve; 200-pressurizing units; 300-a heating unit; 310-heat source; 320—a first temperature sensor; 400-sealing the test unit; 410-a second air reservoir; 420-a pressure release valve; 430-a third butterfly valve; 440-a pressure test subunit; 500-a first butterfly valve; 600-testing station; 610-high temperature valve to be tested; 700-a second temperature sensor; 800-a first pressure sensor; 900-second pressure sensor.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The applicant finds that the tightness of the conventional high-temperature valve is checked by adopting a conventional pressure test in the conventional platform test of the high-temperature valve, and the tightness under the high-temperature and high-pressure environment condition cannot be reflected; in addition, the tightness under the high temperature condition can be checked in a high temperature furnace mode at present, however, the high temperature form and the circulating medium of the high temperature furnace are different from those of the pipeline, the real state of the high temperature valve on the diesel engine cannot be truly simulated, the flowing state is generally difficult to enable the valve of the test section to simultaneously reach the target working condition before and after, manual adjustment is often required, and the test cost is high.
In view of this, an embodiment of the present application provides a high temperature valve platform test device, please refer to fig. 1, and fig. 1 illustrates a schematic structural diagram of the high temperature valve platform test device provided in the embodiment of the present application. The first embodiment of the present application provides a high temperature valve platform test device, which comprises a gas supply unit 100, a pressurizing unit 200, a heating unit 300, a sealing test unit 400, a first butterfly valve 500 and a test station 600; wherein a feed port of the pressurizing unit 200 is communicated with the air supply unit 100; the feed inlet of the heating unit 300 is communicated with the discharge outlet of the pressurizing unit 200; the feed port of the seal test unit 400 is communicated with the discharge port of the heating unit 300, and the feed port of the seal test unit 400 is communicated with the feed port of the pressurizing unit 200; the first butterfly valve 500 is disposed between the feed port of the seal test unit 400 and the discharge port of the air supply unit 100; the test station 600 is used for installing the high temperature valve 610 to be tested, so that the high temperature valve 610 to be tested is respectively communicated with the feed inlet of the sealing test unit 400 and the discharge outlet of the heating unit 300. In this embodiment, the supercharging unit 200 may be a high-temperature and high-pressure centrifugal fan. It will be appreciated that the air supply unit 100, the pressurizing unit 200, the heating unit 300, the seal testing unit 400, the first butterfly valve 500, and the testing station 600 are in communication via pipes. Thus, the environment of the diesel engine is simulated through the pressurizing unit 200 and the heating unit 300, the high-temperature valve 610 to be tested is installed at the test station 600, the tightness of the high-temperature valve 610 to be tested is tested through the seal test unit 400, and the problem that the tightness of the high-temperature valve in the high-temperature and high-pressure environment cannot be checked due to the fact that the conventional pressure test is adopted in the platform test in the prior art is solved.
Referring to fig. 2, fig. 2 illustrates a schematic structural diagram of an air supply unit in a high-temperature valve platform test device according to an embodiment of the present application; in some embodiments, the air supply unit 100 includes a booster pump 110, a first air tank 120, and a second butterfly valve 130; wherein the first air tank 120 is communicated with the booster pump 110; the second butterfly valve 130 is disposed between the discharge port of the first air tank 120 and the feed port of the pressurizing unit 200. In this embodiment, the first air storage tank 120 stores air, the booster pump 110 is used for first boosting the air in the first air storage tank 120, and the second butterfly valve 130 is used for controlling the air in the first air storage tank 120 to enter and exit, so that the air supply flow of the high-temperature valve platform test device is ensured.
Referring to fig. 3, fig. 3 illustrates a schematic structural diagram of a seal testing unit in a high-temperature valve platform testing device according to an embodiment of the present application; in some embodiments, the seal testing unit 400 includes a second air reservoir 410, a pressure relief valve 420, and a third butterfly valve 430; wherein, the feed inlet of the second air storage tank 410 is communicated with the discharge outlet of the heating unit 300; the pressure release valve 420 is arranged between the feed inlet of the second air storage tank 410 and the test station 600; a third butterfly valve 430 is disposed between the pressure relief valve 420 and the test station 600. Specifically, the second gas tank 410 serves to receive gas, and in particular, when the high temperature valve 610 to be tested is closed, if gas still enters the second gas tank 410, it is indicated that there is a problem in the tightness of the high temperature valve 610 to be tested. In addition, the pressure release valve 420 in the embodiment of the present application is used for pressure release and deflation of the second air storage tank 410, and the third butterfly valve 430 is used for controlling the communication and closing of the pipeline, so as to control the switching of the test working conditions.
Further, in order to more intuitively reflect the tightness of the high temperature valve 610 to be tested, the sealing test unit 400 further includes a pressure test subunit 440, where the pressure test subunit 440 is configured to detect the pressure in the second air tank 410, so as to obtain the pressure change condition of the air in the sealing test unit 400 in real time, thereby effectively detecting and evaluating the tightness of the high temperature valve 610 to be tested, and improving the accuracy and reliability of the test.
Referring to fig. 4, fig. 4 is a schematic structural diagram illustrating a heating unit of a high-temperature valve platform test device according to an embodiment of the present disclosure; in some embodiments, the heating unit 300 includes a plurality of heat sources 310 sequentially communicated to progressively heat the gas such that the temperature of the gas is progressively increased to simulate the actual conditions in a high temperature environment, thereby more accurately evaluating the performance and reliability of the high temperature valve 610 to be tested; meanwhile, the heating intensity of different areas can be adjusted according to specific requirements so as to meet different testing requirements of the high-temperature valve 610 to be tested.
To enhance control of the heating effect of the heat source 310, in some embodiments, the heating unit 300 further includes: the plurality of first temperature sensors 320, one first temperature sensor 320 is disposed in each heat source 310 to monitor the temperature of the heat source 310 in real time, and precisely control the heating process, thereby improving the control capability of the heating effect of the heat source 310 and improving the accuracy and reliability of the test.
In some embodiments, the high temperature valve platform test apparatus further comprises a second temperature sensor 700, the second temperature sensor 700 being disposed between the outlet of the heating unit 300 and the test station 600. Specifically, the second temperature sensor 700 is disposed before the test station 600, and after the high temperature valve 610 to be tested is installed in the test station 600, the second temperature sensor 700 is disposed before the high temperature valve 610 to be tested, thereby measuring the temperature of the gas before the high temperature valve 610 to be tested to determine the test condition.
To further ensure that the test conditions simulate the high temperature and high pressure conditions of a diesel engine, in some embodiments, the high temperature valve platform test apparatus further includes a first pressure sensor 800, where the first pressure sensor 800 is disposed between the discharge port of the pressurizing unit 200 and the feed port of the heating unit 300. For measuring the pressure of the gas after passing through the pressurizing unit 200 before entering the heating unit 300.
Similarly, in some embodiments, the high temperature valve platform test apparatus further comprises a second pressure sensor 900, the second pressure sensor 900 being disposed between the outlet of the heating unit 300 and the test station 600. After the high temperature valve 610 to be tested is installed into the test station 600, the second pressure sensor 900 is disposed between the discharge port of the heating unit 300 and the high temperature valve 610 to be tested to measure the pressure of the gas before the high temperature valve 610 to be tested, thereby determining the test condition, and simultaneously, the pressure test subunit 440 detects the tightness of the high temperature valve 610 to be tested.
Accordingly, a second embodiment of the present application provides a high temperature valve platform test method, including:
step S1, controlling the gas supply unit 100 to supply gas;
step S2, controlling the pressurizing unit 200 to pressurize the gas;
step S3, controlling the heating unit 300 to heat the gas;
step S4, the high-temperature valve 610 to be tested is installed at the testing station 600, so that the high-temperature valve 610 to be tested is respectively communicated with the feed inlet of the sealing testing unit 400 and the discharge outlet of the heating unit 300;
and S5, controlling the opening and closing of the first butterfly valve 500, the second butterfly valve 130, the third butterfly valve 430 and the high-temperature valve 610 to be tested, and realizing the test working condition. Specifically, in step S5, the opening and closing of the first butterfly valve 500 and the high temperature valve 610 to be tested are controlled, so as to implement a test condition, including: the third butterfly valve 430 is closed, the first butterfly valve 500 and the second butterfly valve 130 are opened, and the gas sequentially passes through the gas supply unit 100, the pressurizing unit 200, the heating unit 300 and the high temperature valve 610 to be tested, so that an internal circulation condition is realized. Alternatively, step S5 further includes: the second butterfly valve 130 and the third butterfly valve 430 are opened, the first butterfly valve 500 and the high-temperature valve 610 to be tested are closed, and the gas is stabilized after passing through the gas supply unit 100, the pressurizing unit 200 and the heating unit 300 in sequence, so that a closed working condition is realized.
Step S6, based on the test conditions, the sealing test unit 400 is controlled to test the tightness of the high temperature valve 610 to be tested.
In some embodiments, step S6, based on the test conditions, controls the seal test unit 400 to test the tightness of the high temperature valve 610 to be tested, including: controlling the second gas reservoir 410 to receive gas based on the test conditions; the control pressure test subunit 440 tests the pressure in the second air tank 410 to test the tightness of the high temperature valve 610 to be tested.
Specifically, when the test condition is an internal circulation condition, the present application may test the action life of the high temperature valve 610 to be tested by switching the high temperature valve 610 to be tested, whether the switch is stuck, whether different intensities can be resisted, and whether the switch can be turned off and turned on rapidly in an emergency. When the test condition is a closed condition, the tightness of the high temperature valve 610 to be tested is determined by comparing the pressures of the second pressure sensor 900 and the pressure testing subunit 440.
Thus, the environment of the diesel engine is simulated through the pressurizing unit 200 and the heating unit 300, the high-temperature valve 610 to be tested is installed at the test station 600, the tightness of the high-temperature valve 610 to be tested is tested through the seal test unit 400, and the problem that the tightness of the high-temperature valve in the high-temperature and high-pressure environment cannot be checked due to the fact that the conventional pressure test is adopted in the platform test in the prior art is solved.
The above describes in detail a high-temperature valve platform test device and a method provided by the embodiment of the present application, and specific examples are applied to describe the principle and implementation of the present application, where the description of the above embodiment is only used to help understand the technical solution and core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (13)
1. A high temperature valve platform test device, comprising:
a gas supply unit (100);
the feeding port of the pressurizing unit (200) is communicated with the air supply unit (100);
the feed inlet of the heating unit (300) is communicated with the discharge outlet of the pressurizing unit (200);
the feed inlet of the sealing test unit (400) is communicated with the discharge outlet of the heating unit (300), and the feed inlet of the sealing test unit (400) is communicated with the feed inlet of the pressurizing unit (200);
the first butterfly valve (500) is arranged between the feed inlet of the sealing test unit (400) and the discharge outlet of the air supply unit (100);
the test station (600) is used for installing a high-temperature valve (610) to be tested, so that the high-temperature valve (610) to be tested is respectively communicated with a feed inlet of the sealing test unit (400) and a discharge outlet of the heating unit (300).
2. The high temperature valve bench test device according to claim 1, wherein said air supply unit (100) comprises:
a booster pump (110);
a first air tank (120), the first air tank (120) being in communication with the booster pump (110);
the second butterfly valve (130), second butterfly valve (130) set up in between the discharge gate of first gas holder (120) and the feed inlet of booster unit (200).
3. The high temperature valve platform test device according to claim 1, wherein the seal test unit (400) comprises:
the feed inlet of the second air storage tank (410) is communicated with the discharge outlet of the heating unit (300);
the pressure release valve (420) is arranged between the feed inlet of the second air storage tank (410) and the test station (600);
and a third butterfly valve (430), the third butterfly valve (430) being disposed between the pressure relief valve (420) and the test station (600).
4. A high temperature valve bench test apparatus according to claim 3, characterized in that said seal testing unit (400) further comprises a pressure testing sub-unit (440), said pressure testing sub-unit (440) for detecting the pressure in said second air reservoir (410).
5. The high temperature valve platform test apparatus according to claim 1, wherein the heating unit (300) comprises a plurality of heat sources (310) which are sequentially communicated.
6. The high temperature valve platform test device according to claim 5, wherein the heating unit (300) further comprises:
-a plurality of first temperature sensors (320), one of said first temperature sensors (320) being arranged in each of said heat sources (310).
7. The high temperature valve platform test apparatus of claim 1, further comprising:
and the second temperature sensor (700) is arranged between the discharge hole of the heating unit (300) and the testing station (600).
8. The high temperature valve platform test apparatus of claim 1, further comprising:
the first pressure sensor (800) is arranged between the discharge port of the pressurizing unit (200) and the feed port of the heating unit (300).
9. The high temperature valve platform test apparatus of claim 1, further comprising:
and the second pressure sensor (900) is arranged between the discharge hole of the heating unit (300) and the testing station (600).
10. A high temperature valve plateau test method, comprising:
controlling the gas supply unit (100) to supply gas;
controlling a pressurizing unit (200) to pressurize the gas;
controlling a heating unit (300) to heat the gas;
installing a high-temperature valve (610) to be tested on a test station (600) so that the high-temperature valve (610) to be tested is respectively communicated with a feed inlet of a sealing test unit (400) and a discharge outlet of a heating unit (300);
the first butterfly valve (500), the second butterfly valve (130), the third butterfly valve (430) and the high-temperature valve (610) to be tested are controlled to be opened and closed, so that test working conditions are realized;
and controlling a sealing test unit (400) to test the tightness of the high-temperature valve (610) to be tested based on the test working condition.
11. The high temperature valve platform test method according to claim 10, wherein controlling the opening and closing of the first butterfly valve (500) and the high temperature valve (610) to be tested, to achieve the test conditions, comprises:
and closing the third butterfly valve (430), opening the first butterfly valve (500) and the second butterfly valve (130), and enabling the gas to pass through the gas supply unit (100), the pressurizing unit (200), the heating unit (300) and the high-temperature valve (610) to be tested in sequence to realize an internal circulation working condition.
12. The high temperature valve platform test method according to claim 10, wherein the opening and closing of the first butterfly valve (500) and the high temperature valve (610) to be tested are controlled to realize a test condition, further comprising:
the second butterfly valve (130) and the third butterfly valve (430) are opened, the first butterfly valve (500) and the high-temperature valve (610) to be tested are closed, and the gas passes through the gas supply unit (100), the pressurizing unit (200) and the heating unit (300) in sequence and then is stable and motionless, so that a closed working condition is realized.
13. The high temperature valve platform test method according to claim 12, wherein controlling a seal test unit (400) to test the tightness of the high temperature valve (610) to be tested based on the test conditions comprises:
controlling a second gas reservoir (410) to receive the gas based on the test conditions;
a control pressure testing subunit (440) tests the pressure within the second air reservoir (410) to test the tightness of the high temperature valve (610) to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311750993.XA CN117782469A (en) | 2023-12-18 | 2023-12-18 | High-temperature valve platform test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311750993.XA CN117782469A (en) | 2023-12-18 | 2023-12-18 | High-temperature valve platform test device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117782469A true CN117782469A (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311750993.XA Pending CN117782469A (en) | 2023-12-18 | 2023-12-18 | High-temperature valve platform test device and method |
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| Country | Link |
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| CN (1) | CN117782469A (en) |
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2023
- 2023-12-18 CN CN202311750993.XA patent/CN117782469A/en active Pending
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