CN220188693U - Online monitoring device for protective layer protector - Google Patents
Online monitoring device for protective layer protector Download PDFInfo
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- CN220188693U CN220188693U CN202321682756.XU CN202321682756U CN220188693U CN 220188693 U CN220188693 U CN 220188693U CN 202321682756 U CN202321682756 U CN 202321682756U CN 220188693 U CN220188693 U CN 220188693U
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- Prior art keywords
- resistor
- operational amplifier
- protector
- alarm
- leakage current
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- 230000001012 protector Effects 0.000 title claims abstract description 50
- 239000011241 protective layer Substances 0.000 title claims abstract description 18
- 238000012806 monitoring device Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 20
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to the technical field of online monitoring, in particular to an online monitoring device for a protective layer protector, which comprises a comprehensive monitoring unit and a plurality of online monitors, wherein the comprehensive monitoring unit is connected with the online monitors through an RS485 bus, and the online monitors respectively collect leakage current and discharge action times of the protective layer protector through a leakage current collecting circuit and a discharge action monitoring circuit and alarm through an alarm circuit. The utility model is connected between the grounding end of the cable sheath protector and the ground in a penetrating way, the over-leakage current acquisition circuit and the discharge action monitoring circuit record the action times and the leakage current of the cable sheath protector, so that the problem of non-fine detection by naked eyes or other methods is avoided, the relative change trend of the performance of the sheath protector can be accurately monitored on line, and the alarm circuit can automatically alarm when gaps or non-strict sealing occurs to the sheath protector. Real-time monitoring data, alarm information, historical data, statistical information and the like.
Description
Technical Field
The utility model relates to the technical field of online monitoring, in particular to an online monitoring device for a protective layer protector.
Background
At present, a zinc oxide piezoresistor or a zinc oxide valve plate is generally adopted as a protective element in a cable sheath voltage limiter in the market, and in the long-term operation process, the insulation performance is gradually reduced due to internal damp or valve plate aging caused by the fact that the equipment is not tightly sealed under the open air condition. In this case, the full current and the resistive current of the device are significantly increased, and thus a series of problems such as voltage instability occur. In addition, when overvoltage or power frequency short circuit occurs, the zinc oxide valve plate can be thermally broken and damaged. Companies have made targeted developments for the above problems. In the prior art, the sheath voltage limiter can only be maintained by simple visual inspection, such as porcelain bushing decontamination, whether the surface has cracks or periodic tests. The fault of the voltage limiter of the cable sheath is difficult to be found in time by naked eyes in the fine inspection mode; if the fault cable sheath voltage limiter cannot be found and replaced in time, the cable line is burnt, and the property loss and the safety problem of equipment operation maintenance personnel can be caused to pose a great threat. Therefore, the utility model develops the online detection device of the sheath protector on the basis of safety, which is used for preventing the problems that the damage of some fine parts which cannot be observed by naked eyes or other methods causes the burning of a cable line or threatens the personal safety of operation maintenance personnel due to the loss of the protection of the voltage limiter of the cable sheath, and the personnel cannot be kept beside the equipment at any time. The utility model can monitor and record the leakage current and the discharge action of the cable sheath protector in real time, can protect the sheath protector in advance, and reduces the threat to personnel safety in the operation and maintenance work.
Disclosure of Invention
The utility model aims to solve the defects in the background technology by providing an on-line monitoring device for a protective layer protector.
The technical scheme adopted by the utility model is as follows:
the online monitoring device comprises a comprehensive monitoring unit and a plurality of online monitors, wherein the comprehensive monitoring unit is connected with the online monitors through an RS485 bus, and the online monitors respectively collect leakage current and discharge action times of the protective layer protector through a leakage current collecting circuit and a discharge action monitoring circuit and alarm through an alarm circuit.
As a preferred technical scheme of the utility model: the on-line monitor is installed between the grounding end of the protective layer protector and the ground in a penetrating way through a penetrating type structure.
As a preferred technical scheme of the utility model: the comprehensive monitoring unit periodically collects collected data of the online monitor.
As a preferred technical scheme of the utility model: the leakage current acquisition circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a second diode, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a first operational amplifier; the first resistor first end and the second resistor first end are connected with the grounding end of the protective layer protector, the first resistor second end and the second resistor second end are connected with the third resistor first end, the first diode anode, the sixth resistor first end, the first capacitor first end and the seventh resistor first end, the third resistor second end is respectively connected with the fourth resistor first end and the ground, the first diode cathode is connected with the second diode cathode, the second diode anode is connected with the fourth resistor second end and the second resistor first end, the fifth resistor second end is connected with the sixth resistor second end, the first capacitor second end and the ground, the seventh resistor second end is connected with the first operational amplifier input end, the first operational amplifier output end is connected with the eighth resistor first end, and the eighth resistor second end is connected with the RS485 bus.
As a preferred technical scheme of the utility model: the discharge action monitoring circuit comprises a ninth resistor, a coil sensor, a tenth resistor, a second operational amplifier, an eleventh resistor, a twelfth resistor, a third operational amplifier, a second capacitor, a thirteenth resistor and a numerical comparator; the ninth resistor is connected with the power supply at the first end, the ninth resistor is connected with the first end of the coil sensor and the first end of the tenth resistor, the second end of the tenth resistor is connected with the first input end of the second operational amplifier and the first end of the eleventh resistor, the second input end of the second operational amplifier is connected with the power supply, the second end of the eleventh resistor is connected with the second operational amplifier output end and the first end of the twelfth resistor, the second end of the twelfth resistor is connected with the first input end of the third operational amplifier and the first end of the first capacitor, the second input end of the third operational amplifier is connected with the power supply, the second end of the second capacitor is connected with the first end of the third operational amplifier output end and the first end of the thirteenth resistor, and the second end of the thirteenth resistor is connected with the first input end of the numerical comparator.
As a preferred technical scheme of the utility model: and a second input end of the numerical comparator inputs a system threshold of the action times through the comprehensive monitoring unit.
As a preferred technical scheme of the utility model: the alarm circuit comprises a fourteenth resistor, a first alarm lamp, a fifteenth resistor and a first alarm, wherein the first end of the fourteenth resistor and the first end of the fifteenth resistor are connected with the output end of the leakage current acquisition circuit and the output end of the discharge action monitoring circuit, the second end of the fourteenth resistor is connected with the anode of the first alarm lamp, the second end of the fifteenth resistor is connected with the first end of the first alarm lamp, and the cathode of the first alarm lamp and the second end of the first alarm lamp are grounded.
Compared with the prior art, the online monitoring device for the protective layer protector has the beneficial effects that:
according to the online monitoring device for the sheath protector, disclosed by the utility model, the over-leakage current acquisition circuit and the discharge action monitoring circuit record the action times and the leakage current of the cable sheath protector. The operation condition of all the sheath protectors can be detected, the problem of unreliability of naked eyes or other detection methods is avoided, the relative change trend of the performance of the sheath protectors can be accurately monitored on line, the cable protector is installed between the grounding end of the cable sheath protector and the ground in a penetrating way, and an alarm circuit is used for automatically alarming when gaps or sealing of the sheath protector are not strict. Real-time monitoring data, alarm information, historical data, statistical information and the like.
Drawings
FIG. 1 is a block diagram of an apparatus according to a preferred embodiment of the present utility model;
FIG. 2 is a leakage current collection circuit diagram of a preferred embodiment of the present utility model;
FIG. 3 is a diagram of a discharge action monitoring circuit according to a preferred embodiment of the present utility model;
FIG. 4 is a block diagram of an application of the on-line monitoring device of another preferred embodiment;
fig. 5 is a signal connection diagram of a voltage detection circuit according to another preferred embodiment.
Detailed Description
It should be noted that, under the condition of no conflict, the embodiments of the present embodiments and features in the embodiments may be combined with each other, and the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and obviously, the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the preferred embodiment of the utility model provides an online monitoring device for a protective layer protector, which comprises a comprehensive monitoring unit and a plurality of online monitors, wherein the comprehensive monitoring unit is connected with the online monitors through an RS485 bus, and the online monitors respectively collect leakage current and discharge action times of the protective layer protector through a leakage current collecting circuit and a discharge action monitoring circuit and alarm through an alarm circuit.
The on-line monitor is installed between the grounding end of the protective layer protector and the ground in a penetrating way through a penetrating type structure.
The comprehensive monitoring unit periodically collects collected data of the online monitor.
The leakage current acquisition circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a second diode, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a first operational amplifier; the first resistor first end and the second resistor first end are connected with the grounding end of the protective layer protector, the first resistor second end and the second resistor second end are connected with the third resistor first end, the first diode anode, the sixth resistor first end, the first capacitor first end and the seventh resistor first end, the third resistor second end is respectively connected with the fourth resistor first end and the ground, the first diode cathode is connected with the second diode cathode, the second diode anode is connected with the fourth resistor second end and the second resistor first end, the fifth resistor second end is connected with the sixth resistor second end, the first capacitor second end and the ground, the seventh resistor second end is connected with the first operational amplifier input end, the first operational amplifier output end is connected with the eighth resistor first end, and the eighth resistor second end is connected with the RS485 bus.
The discharge action monitoring circuit comprises a ninth resistor, a coil sensor, a tenth resistor, a second operational amplifier, an eleventh resistor, a twelfth resistor, a third operational amplifier, a second capacitor, a thirteenth resistor and a numerical comparator; the ninth resistor is connected with the power supply at the first end, the ninth resistor is connected with the first end of the coil sensor and the first end of the tenth resistor, the second end of the tenth resistor is connected with the first input end of the second operational amplifier and the first end of the eleventh resistor, the second input end of the second operational amplifier is connected with the power supply, the second end of the eleventh resistor is connected with the second operational amplifier output end and the first end of the twelfth resistor, the second end of the twelfth resistor is connected with the first input end of the third operational amplifier and the first end of the first capacitor, the second input end of the third operational amplifier is connected with the power supply, the second end of the second capacitor is connected with the first end of the third operational amplifier output end and the first end of the thirteenth resistor, and the second end of the thirteenth resistor is connected with the first input end of the numerical comparator.
And a second input end of the numerical comparator inputs a system threshold of the action times through the comprehensive monitoring unit.
The alarm circuit comprises a fourteenth resistor, a first alarm lamp, a fifteenth resistor and a first alarm, wherein the first end of the fourteenth resistor and the first end of the fifteenth resistor are connected with the output end of the leakage current acquisition circuit and the output end of the discharge action monitoring circuit, the second end of the fourteenth resistor is connected with the anode of the first alarm lamp, the second end of the fifteenth resistor is connected with the first end of the first alarm lamp, and the cathode of the first alarm lamp and the second end of the first alarm lamp are grounded.
In this embodiment, referring to fig. 1, the online monitor of the sheath protector is used as a sensor of the whole system, and is installed together with the sheath protector, and is installed between the grounding end of the sheath protector and the ground in a penetration way, so as to automatically alarm when a gap or a seal of the sheath protector is not strict. Real-time monitoring data, alarm information, historical data, statistical information and the like. The change trend of leakage current can be intelligently monitored. The online monitor of the sheath protector consists of a comprehensive monitoring unit and a plurality of online monitors (sensors). Referring to fig. 2, the integrated monitoring unit and the on-line monitor are connected through an RS485 bus, and leakage current and action times of the cable sheath protector are respectively monitored in real time through a leakage current acquisition circuit and a discharge action monitoring circuit.
Referring to fig. 2, the leakage current collection circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a second diode D2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a first operational amplifier A1; the first end of the first resistor R1R and the first end of the second resistor R2 are connected with the grounding end of the protective layer protector, the second end of the first resistor R1 and the second end of the second resistor R2 are connected with the first end of the third resistor R3, the anode of the first diode D1, the first end of the sixth resistor R6, the first end of the first capacitor C1 and the first end of the seventh resistor R7, the second end of the third resistor R3 is respectively connected with the first end of the fourth resistor R4 and the ground, the cathode of the first diode D1 is connected with the cathode of the second diode D2, the anode of the second diode D2 is connected with the second end of the fourth resistor and the first end of the second resistor R2, the second end of the fifth resistor R5 is connected with the second end of the sixth resistor R6, the second end of the first capacitor C1 and the ground, the second end of the seventh resistor R7 is connected with the input end of the first operational amplifier A1, the output of the first operational amplifier A1 is connected with the first end of the eighth resistor R8, and the eighth resistor R8 is connected with the RS 485.
Referring to fig. 3, the discharge action monitoring circuit includes a ninth resistor R9, a coil sensor L, a tenth resistor R10, a second operational amplifier A2, an eleventh resistor R11, a twelfth resistor R12, a third operational amplifier A3, a second capacitor C2, a thirteenth resistor R13, and a numerical comparator; the first end of the ninth resistor R9 is connected with a power supply, the second end of the ninth resistor R9 is connected with the first end of the coil sensor L and the first end of the tenth resistor R10, the second end of the tenth resistor R10 is connected with the first input end of the second operational amplifier A2 and the first end of the eleventh resistor R11, the second input end of the second operational amplifier A2 is connected with the first end of the twelfth resistor R12, the second end of the twelfth resistor R12 is connected with the first input end of the third operational amplifier A3 and the first end of the first capacitor C1, the second input end of the third operational amplifier A3 is connected with the power supply, the second end of the second capacitor C2 is connected with the first end of the third operational amplifier A3 and the first end of the thirteenth resistor R13, and the second end of the thirteenth resistor R13 is connected with the first input end of the numerical comparator.
The alarm circuit comprises a fourteenth resistor R14, a first alarm lamp LED1, a fifteenth resistor R15 and a first alarm B1, wherein the first end of the fourteenth resistor R14 and the first end of the fifteenth resistor R15 are connected with the second end of the eighth resistor R8 and the output end of the numerical comparator, the second end of the fourteenth resistor R14 is connected with the anode of the first alarm lamp LED1, the second end of the fifteenth resistor R15 is connected with the first end of the first alarm B1, and the cathode of the first alarm lamp LED1 and the second end of the first alarm B1 are grounded.
And when the leakage current acquisition circuit and the discharge action monitoring circuit respectively reach the leakage current and the discharge action reaching the action frequency system threshold value, alarming is carried out through the alarm circuit.
The comprehensive monitoring unit is used as a monitoring background of the system, periodically collects leakage current and action frequency data of each sensor, and analyzes the collected data:
when the fundamental and third harmonic values of the leakage current are greater than the set threshold values, it is indicated that the components inside the cable sheath protector have aged and need to be replaced.
When the fundamental wave of the leakage current is larger than the set threshold value, the device inside the cable sheath protector is broken down or wetted, and the device needs to be replaced.
And when the value of the discharge times is larger than the threshold value set by the system, giving early warning information.
In addition, the user can judge whether the cable sheath protector starts to age or not through inquiring historical data of leakage current and through the change trend of the historical data. The online monitor for the sheath protector is an intelligent instrument taking a high-performance microprocessor as a core, can monitor and record leakage current and discharge actions of the cable sheath protector in real time, and is communicated with background monitoring equipment through an RS485 bus, and the communication protocol is MODBUS.
In one embodiment, referring to fig. 4 and 5, a ground wire of the grounding cabinet of the on-line monitor is designed with 6 connection incoming wires and 6 incoming wires are reserved. The leakage current and the discharge action times of the ground cabinet are respectively acquired through a leakage current acquisition circuit and a discharge action monitoring circuit of the on-line monitor, the on-line monitoring unit is used as a system unit, the running state of the system unit is monitored in real time, and signals are transmitted to a control center in real time to carry out comprehensive judgment. The signals are directly connected into the IO board, the IO board carries out signal processing, the conditioned signals are sent into the control board to be collected and converted into digital signals, and intelligent judgment processing is carried out.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The utility model provides a sheath protector on-line monitoring device, includes comprehensive monitoring unit and a plurality of on-line monitor, its characterized in that: the comprehensive monitoring unit is connected with the online monitor through an RS485 bus, and the online monitor respectively collects leakage current and discharge action times of the protective layer protector through a leakage current collecting circuit and a discharge action monitoring circuit and alarms through an alarm circuit.
2. The sheath protector on-line monitoring device of claim 1, wherein: the on-line monitor is installed between the grounding end of the protective layer protector and the ground in a penetrating way through a penetrating type structure.
3. The sheath protector on-line monitoring device of claim 1, wherein: the comprehensive monitoring unit periodically collects collected data of the online monitor.
4. The sheath protector on-line monitoring device of claim 1, wherein: the leakage current acquisition circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a second diode, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor and a first operational amplifier; the first resistor first end and the second resistor first end are connected with the grounding end of the protective layer protector, the first resistor second end and the second resistor second end are connected with the third resistor first end, the first diode anode, the sixth resistor first end, the first capacitor first end and the seventh resistor first end, the third resistor second end is respectively connected with the fourth resistor first end and the ground, the first diode cathode is connected with the second diode cathode, the second diode anode is connected with the fourth resistor second end and the second resistor first end, the fifth resistor second end is connected with the sixth resistor second end, the first capacitor second end and the ground, the seventh resistor second end is connected with the first operational amplifier input end, the first operational amplifier output end is connected with the eighth resistor first end, and the eighth resistor second end is connected with the RS485 bus.
5. The sheath protector on-line monitoring device of claim 1, wherein: the discharge action monitoring circuit comprises a ninth resistor, a coil sensor, a tenth resistor, a second operational amplifier, an eleventh resistor, a twelfth resistor, a third operational amplifier, a second capacitor, a thirteenth resistor and a numerical comparator; the ninth resistor is connected with the power supply at the first end, the ninth resistor is connected with the first end of the coil sensor and the first end of the tenth resistor, the second end of the tenth resistor is connected with the first input end of the second operational amplifier and the first end of the eleventh resistor, the second input end of the second operational amplifier is connected with the power supply, the second end of the eleventh resistor is connected with the second operational amplifier output end and the first end of the twelfth resistor, the second end of the twelfth resistor is connected with the first input end of the third operational amplifier and the first end of the first capacitor, the second input end of the third operational amplifier is connected with the power supply, the second end of the second capacitor is connected with the first end of the third operational amplifier output end and the first end of the thirteenth resistor, and the second end of the thirteenth resistor is connected with the first input end of the numerical comparator.
6. The online sheath protector monitoring device of claim 5, wherein: and a second input end of the numerical comparator inputs a system threshold of the action times through the comprehensive monitoring unit.
7. The sheath protector on-line monitoring device of claim 1, wherein: the alarm circuit comprises a fourteenth resistor, a first alarm lamp, a fifteenth resistor and a first alarm, wherein the first end of the fourteenth resistor and the first end of the fifteenth resistor are connected with the output end of the leakage current acquisition circuit and the output end of the discharge action monitoring circuit, the second end of the fourteenth resistor is connected with the anode of the first alarm lamp, the second end of the fifteenth resistor is connected with the first end of the first alarm lamp, and the cathode of the first alarm lamp and the second end of the first alarm lamp are grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321682756.XU CN220188693U (en) | 2023-06-29 | 2023-06-29 | Online monitoring device for protective layer protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321682756.XU CN220188693U (en) | 2023-06-29 | 2023-06-29 | Online monitoring device for protective layer protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220188693U true CN220188693U (en) | 2023-12-15 |
Family
ID=89110703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321682756.XU Active CN220188693U (en) | 2023-06-29 | 2023-06-29 | Online monitoring device for protective layer protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220188693U (en) |
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2023
- 2023-06-29 CN CN202321682756.XU patent/CN220188693U/en active Active
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