CN214539860U - High-voltage cable oil-filling terminal monitoring device - Google Patents
High-voltage cable oil-filling terminal monitoring device Download PDFInfo
- Publication number
- CN214539860U CN214539860U CN202022893189.5U CN202022893189U CN214539860U CN 214539860 U CN214539860 U CN 214539860U CN 202022893189 U CN202022893189 U CN 202022893189U CN 214539860 U CN214539860 U CN 214539860U
- Authority
- CN
- China
- Prior art keywords
- voltage cable
- voltage
- miniature
- compound eye
- monitoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Gas Or Oil Filled Cable Accessories (AREA)
Abstract
The utility model relates to a high-voltage cable oil-filled terminal monitoring device, which comprises two high-voltage cable oil-filled terminals, two multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, wherein the high-voltage circuit breaker is connected with a power supply side, the two cable oil-filled terminals are connected through a high-voltage cable and connected with the high-voltage circuit breaker and a user load side through a high-voltage lead; the multifunctional compound eye detection device comprises a plurality of miniature infrared probes, miniature high-definition visible light probes and miniature X-ray probes, the three miniature probes are arranged at intervals to form a compound eye structure, the two multifunctional compound eye detection devices are respectively installed at proper positions beside corresponding high-voltage cable oil filling terminals to detect the relevant working states of the high-voltage cable oil filling terminals, and the two multifunctional compound eye detection devices are respectively electrically connected with the control device to transmit monitoring signals of the miniature probes to the control device in real time. The device is favorable for monitoring the working and fault conditions of the cable oil filling terminal comprehensively and accurately in real time.
Description
Technical Field
The utility model belongs to the technical field of the electric power monitoring, concretely relates to high tension cable oil charge terminal monitoring devices.
Background
In the prior art, the monitoring scheme of the 220kV high-voltage cable oil-filled terminal mainly has the following three modes: 1) workers carry infrared and ultraviolet detection instruments respectively to detect overheating and discharging faults of the power high-voltage cable terminal; 2) installing a common visible light probe, and carrying out visual observation on the power high-voltage cable terminal; 3) and (5) power failure, and performing electrical tests such as insulation, voltage resistance, leakage, direct current resistance and the like. In the former two modes, because the monitoring means is not adaptively designed according to the structural characteristics and the operation mode of the 220kV high-voltage cable oil-filled terminal equipment, the heating and discharging faults of the 220kV high-voltage cable oil-filled terminal can be omitted or cannot be accurately detected in time in actual application, and the internal components of the high-voltage cable oil-filled terminal equipment in operation cannot be monitored in a perspective way, although the internal and external faults of the 220kV high-voltage cable oil-filled terminal equipment can be indirectly detected through a related high-voltage test, the operation can be carried out only when power failure occurs. Therefore, the existing monitoring scheme cannot meet the requirements of carrying out real-time, online and internal and external comprehensive and accurate monitoring on the 220kV high-voltage cable oil-filled terminal equipment.
Disclosure of Invention
An object of the utility model is to provide a high tension cable oil charge terminal monitoring devices, the device do benefit to real-time, comprehensive, accurately monitor the work and the fault situation at cable oil charge terminal.
In order to achieve the above object, the utility model adopts the following technical scheme: a high-voltage cable oil filling terminal monitoring device comprises two high-voltage cable oil filling terminals, two multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, wherein a primary input end of the high-voltage circuit breaker is electrically connected to a power supply side through a high-voltage wire, a primary output end of the high-voltage circuit breaker is electrically connected to an outlet hardware fitting of a first high-voltage cable oil filling terminal through the high-voltage wire, the first high-voltage cable oil filling terminal is electrically connected with a second high-voltage cable oil filling terminal through a 220kV high-voltage cable, and the outlet hardware fitting of the second high-voltage cable oil filling terminal is electrically connected to a user load side through the high-voltage wire; the multifunctional compound eye detection device comprises a plurality of miniature infrared probes, miniature high-definition visible light probes and miniature X-ray probes, wherein the three miniature probes are arranged at intervals to form a compound eye structure to form the multifunctional compound eye detection device, the two multifunctional compound eye detection devices are respectively arranged at proper positions beside corresponding high-voltage cable oil filling terminals to detect the relevant working states of the high-voltage cable oil filling terminals, the miniature infrared probes are used for detecting sudden malignant heating faults in the operation of the high-voltage cable oil filling terminals, the miniature high-definition visible light probes are used for detecting sudden malignant discharge faults and serious oil leakage in the operation of the high-voltage cable oil filling terminals, the miniature X-ray probes are used for detecting the faults of internal components of the high-voltage cable oil filling terminals, and the multifunctional compound eye detection device comprises an internal insulation wrapping tape, insulation glue and an insulation fastener which generate a large number of chemical reactions due to the serious degradation of internal insulation oil, the multifunctional compound eye detection device comprises an insulating bag belt, insulating glue, an insulating fastener, two multifunctional compound eye detection devices and a control device, wherein the insulating bag belt and the insulating glue are seriously expanded and the insulating fastener is seriously cracked, deformed and displaced, and the two multifunctional compound eye detection devices are respectively and electrically connected with the control device so as to transmit monitoring signals of all miniature probes to the control device in real time.
Furthermore, each miniature probe in the multifunctional compound eye detection device is set to be different in focal length, aperture and depth of field, so that within the respective wavelength range, the miniature probe can be used for observing the condition of the high-voltage cable oil-filled terminal in a wide-angle and comprehensive mode, the focusing probe can be used for amplifying local details of each position, and the miniature probes with different apertures and depth of field changes are used for achieving comprehensive monitoring in multiple dimensions and transmitting monitoring signals to the control device in real time.
Furthermore, the two high-voltage cable oil-filling terminals are respectively installed on the two equipment supporting rods, and the multifunctional compound eye detection device is respectively installed beside the corresponding equipment supporting rods through the installation support so as to detect the working state of the corresponding cable oil-filling terminal.
Furthermore, the high-voltage cable oil-filling terminal comprises an insulating wrapping tape, insulating glue, insulating oil, a wire outgoing rod, a stress cone, an upper sealing gland group, a lower sealing gland group, a high-strength insulating porcelain bushing, a supporting insulator and a wire outgoing hardware fitting, wherein the upper sealing gland group and the lower sealing gland group are respectively connected with the upper end and the lower end of the high-strength insulating porcelain bushing, the supporting insulator is arranged on the periphery of the lower sealing gland group, a 220kV high-voltage cable penetrates into a hollow cavity of the high-strength insulating porcelain bushing from the lower end of the lower sealing gland group and is connected with the wire outgoing rod and the stress cone, the wire outgoing rod is upwards connected with the hardware fitting wire outgoing, and the wire outgoing hardware fitting penetrates out of the upper end of the upper sealing gland group and is electrically connected with a high-voltage wire so as to be connected with the primary input end of the high-voltage circuit breaker or the load side of a user; an insulating wrapping tape and insulating glue are wrapped outside the connecting position of the 220kV high-voltage cable and the outlet rod, and insulating oil is filled in a hollow cavity of the high-strength insulating porcelain bushing.
Furthermore, the control device comprises a data processing unit and a control execution unit, wherein the data processing unit processes monitoring signal data sent by each miniature probe to obtain corresponding monitoring data and compares the corresponding monitoring data with corresponding protection setting values, and when each monitoring data exceeds the corresponding protection setting value, the control execution unit quickly trips and disconnects the high-voltage circuit breaker to isolate the 220kV high-voltage cable with a cable oil-filled terminal having a malignant fault from a power grid.
Furthermore, the output end of the multifunctional compound eye detection device is electrically connected with the input end of a data processing unit of the control device, the output end of the data processing unit is connected with the input end of the control execution unit, the output end of the control execution unit is electrically connected with a secondary control tripping circuit of the high-voltage circuit breaker, the primary working state of opening or closing of the high-voltage circuit breaker is controlled by the secondary control tripping circuit, and the secondary control tripping circuit controls the operation mechanism of the high-voltage circuit breaker to act according to an instruction sent by the control execution unit, so that the moving contact of the circuit breaker is rapidly separated from the state of close contact with the fixed contact, and the power supply is cut off.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses structure to 220kV high tension cable oil charge terminal, operational mode and self characteristics, designed one kind by a plurality of miniature infrared probe, the multi-functional compound eye detection device that miniature high definition visible light probe and miniature X ray probe are constituteed monitors and protects cable oil charge terminal, the device can the multidimension degree online, in real time, the equipment overheat at accurate monitoring 220kV high tension cable oil charge terminal, the trouble of discharging, observe its inside trouble including the perspective, thereby can in time warn the trouble hidden danger, reach the purpose of effective prevention and avoiding 220kV high tension cable oil charge terminal trouble development.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the oil filling terminal of the high-voltage cable according to the embodiment of the present invention.
Fig. 3 is a schematic diagram of an internal fault state of the oil filling terminal of the high-voltage cable according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the multifunctional compound eye detection device in the embodiment of the present invention.
Fig. 5 is a control schematic diagram of an apparatus according to an embodiment of the present invention.
In the figure: 1-a high voltage circuit breaker; 2-a first high voltage cable oil fill terminal; 3-a first multifunctional compound eye detection device; 4-220kV high-voltage cable; 5-a second high voltage cable oil fill terminal; 6-a second multifunctional compound eye detection device; 7-a support insulator; 8-lower sealing gland group; 9-insulating wrapping tape and insulating glue; 10-a stress cone; 11-high-strength insulating porcelain bushing; 12-insulating oil; 13-a wire outlet rod; 14-upper sealing gland group; 15-wire outlet hardware; 16-a device support bar; 17-a miniature infrared probe; 18-a miniature high-definition visible light probe; 19-miniature X-ray probe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the utility model provides a high-voltage cable oil-filling terminal monitoring device, which comprises two high-voltage cable oil-filling terminals, two multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, the high-voltage circuit breaker is used for connecting a power supply side and controlling the on-off of a 220kV high-voltage cable, the high-voltage cable oil-filled terminal is used for protecting and supporting the connection, transition and conversion of the 220kV high-voltage cable, the primary input end of the high-voltage circuit breaker is electrically connected to the power supply side through a high-voltage wire, the primary output end of the high-voltage circuit breaker is electrically connected to the wire outlet hardware fitting of the first high-voltage cable oil-filling terminal through the high-voltage wire, the first high-voltage cable oil-filled terminal is electrically connected with the second high-voltage cable oil-filled terminal through a 220kV high-voltage cable, and the wire outlet hardware fitting of the second high-voltage cable oil-filled terminal is electrically connected to the user load side through a high-voltage wire. As shown in fig. 4, the multi-functional compound eye detection device comprises a plurality of micro infrared probes, micro high-definition visible light probes and micro X-ray probes, wherein the three micro infrared probes are arranged at intervals to form a compound eye structure to form the multi-functional compound eye detection device, the two multi-functional compound eye detection devices are respectively installed at proper positions beside corresponding high-voltage cable oil-filled terminals to detect relevant working states of the high-voltage cable oil-filled terminals, the micro infrared probes are used for detecting sudden malignant heating faults in the operation of the high-voltage cable oil-filled terminals, the micro high-definition visible light probes are used for detecting sudden malignant discharge faults and serious oil leakage in the operation of the high-voltage cable oil-filled terminals, including oil spraying and other malignant faults, the micro X-ray probes are used for detecting faults of internal components of the high-voltage cable oil-filled terminals, including internal insulation wrapping tapes, insulation glue and insulation fasteners, which generate a large amount of chemical reactions due to serious deterioration of the internal insulation oil, the multifunctional compound eye detection device comprises an insulating bag belt, insulating glue, an insulating fastener, two multifunctional compound eye detection devices and a control device, wherein the insulating bag belt and the insulating glue are seriously expanded and the insulating fastener is seriously cracked, deformed and displaced, and the two multifunctional compound eye detection devices are respectively and electrically connected with the control device so as to transmit monitoring signals of all miniature probes to the control device in real time.
In this embodiment, the two high-voltage cable oil-filled terminals are respectively installed on the two equipment support rods, and the multifunctional compound eye detection device is respectively installed beside the corresponding equipment support rod through the installation support to detect the working state of the corresponding cable oil-filled terminal. Every miniature probe among the multi-functional compound eye detection device sets up to different focal length, diaphragm and depth of field to in its respective wavelength range, possess height simultaneously respectively, clear, far observation function, there is the miniature probe of wide angle comprehensive observation high-tension cable oil charge terminal condition in respective wavelength range promptly, have the focusing probe that amplifies to each local detail again, there is the miniature probe of different diaphragm and depth of field change in addition, reach the comprehensive monitoring of multidimension degree, and give controlling means with monitoring signal real-time transmission.
As shown in fig. 2, the high-voltage cable oil-filling terminal includes an insulating wrapping tape, an insulating glue, an insulating oil, a wire outgoing rod, a stress cone, an upper sealing gland group, a lower sealing gland group, a high-strength insulating porcelain bushing, a supporting insulator and a wire outgoing hardware, wherein the upper sealing gland group and the lower sealing gland group are respectively connected with the upper end and the lower end of the high-strength insulating porcelain bushing, the supporting insulator is arranged on the periphery of the lower sealing gland group, a 220kV high-voltage cable penetrates into a hollow cavity of the high-strength insulating porcelain bushing from the lower end of the lower sealing gland group and is connected with the wire outgoing rod and the stress cone, the wire outgoing rod is upwards connected with the wire outgoing hardware, and the wire outgoing hardware penetrates out from the upper end of the upper sealing gland group and is electrically connected with a high-voltage wire so as to be connected with a primary input end or a user load side of the high-voltage circuit breaker; an insulating wrapping tape and insulating glue are wrapped outside the connecting position of the 220kV high-voltage cable and the outlet rod, and insulating oil is filled in a hollow cavity of the high-strength insulating porcelain bushing.
As shown in fig. 5, the control device includes a data processing unit and a control execution unit, the data processing unit processes the monitoring signal data sent by each micro probe to obtain corresponding monitoring data, and the data processing unit is preset with the following protection setting values: 1) protecting and setting a temperature of sudden malignant heating fault of a cable oil filling terminal; 2) comparing series atlas protection setting values with an image of sudden malignant discharge fault discharge of a cable oil charging terminal; 3) comparing and protecting a setting value of external serious oil leakage and oil injection series maps; 4) the cable oil filling terminal bursts an X-ray series contrast map protection setting value which is seriously deformed due to internal malignant faults; the data processing unit compares the monitoring data obtained by each miniature probe with the corresponding protection setting value, and when each monitoring data exceeds the corresponding protection setting value, the control execution unit quickly trips and cuts off the power of the high-voltage circuit breaker to isolate the 220kV high-voltage cable with a cable oil-filled terminal having a malignant fault from a power grid, so that the accident is prevented from being enlarged, and meanwhile, the safety of workers and high-voltage cable equipment is protected.
The output end of the multifunctional compound eye detection device is electrically connected with the input end of a data processing unit of the control device, the output end of the data processing unit is connected with the input end of the control execution unit, the output end of the control execution unit is electrically connected with a secondary control tripping circuit of the high-voltage circuit breaker, the primary working state of opening or closing of the high-voltage circuit breaker is controlled by the secondary control tripping circuit, and the secondary control tripping circuit controls the operation mechanism of the high-voltage circuit breaker to act according to an instruction sent by the control execution unit, so that a moving contact of the circuit breaker is rapidly separated from a state of being in close contact with a fixed contact, and a power supply is cut off.
Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.
Claims (6)
1. A high-voltage cable oil filling terminal monitoring device is characterized by comprising two high-voltage cable oil filling terminals, two multifunctional compound eye detection devices, a high-voltage circuit breaker and a control device, wherein a primary input end of the high-voltage circuit breaker is electrically connected to a power supply side through a high-voltage wire, a primary output end of the high-voltage circuit breaker is electrically connected to an outlet hardware fitting of a first high-voltage cable oil filling terminal through the high-voltage wire, the first high-voltage cable oil filling terminal is electrically connected with a second high-voltage cable oil filling terminal through a 220kV high-voltage cable, and the outlet hardware fitting of the second high-voltage cable oil filling terminal is electrically connected to a user load side through the high-voltage wire; the multifunctional compound eye detection device comprises a plurality of miniature infrared probes, miniature high-definition visible light probes and miniature X-ray probes, wherein the miniature infrared probes, the miniature high-definition visible light probes and the miniature X-ray probes are arranged at intervals to form a compound eye structure to form the multifunctional compound eye detection device, the two multifunctional compound eye detection devices are respectively installed at proper positions beside corresponding high-voltage cable oil filling terminals to detect related working states of the high-voltage cable oil filling terminals, the miniature infrared probes are used for detecting sudden malignant heating faults in the operation of the high-voltage cable oil filling terminals, the miniature high-definition visible light probes are used for detecting sudden malignant discharge faults and serious oil leakage in the operation of the high-voltage cable oil filling terminals, and the miniature X-ray probes are used for detecting internal component faults of the high-voltage cable oil filling terminals and comprise internal insulation wrapping tapes, The two multifunctional compound eye detection devices are respectively and electrically connected with the control device so as to transmit monitoring signals of each miniature probe to the control device in real time.
2. The device for monitoring the oil-filled terminal of the high-voltage cable according to claim 1, wherein each micro probe in the multifunctional compound eye detection device is set to have different focal lengths, apertures and depths of field, so that within the respective wavelength range, the device has the micro probe for wide-angle overall observation of the condition of the oil-filled terminal of the high-voltage cable, the focusing probe for amplifying local details of each position, and the micro probe with different apertures and depths of field, thereby achieving multi-dimensional overall monitoring and transmitting monitoring signals to the control device in real time.
3. The device for monitoring the oil filling terminal of the high-voltage cable according to claim 1, wherein the two high-voltage cable oil filling terminals are respectively installed on two equipment support rods, and the multifunctional compound eye detection device is respectively installed beside the corresponding equipment support rod through the installation bracket so as to detect the working state of the corresponding cable oil filling terminal.
4. The high-voltage cable oil-filling terminal monitoring device according to claim 1, wherein the high-voltage cable oil-filling terminal comprises an insulating wrapping tape, insulating glue, insulating oil, a wire outgoing rod, a stress cone, an upper sealing gland group, a lower sealing gland group, a high-strength insulating porcelain bushing, a supporting insulator and a wire outgoing hardware fitting, wherein the upper sealing gland group and the lower sealing gland group are respectively connected with the upper end and the lower end of the high-strength insulating porcelain bushing, the supporting insulator is arranged on the periphery of the lower sealing gland group, a 220kV high-voltage cable penetrates into a hollow cavity of the high-strength insulating porcelain bushing from the lower end of the lower sealing gland group and is connected with the wire outgoing rod and the stress cone, the wire outgoing rod is upwards connected with the wire outgoing hardware fitting, and the wire outgoing hardware fitting penetrates out of the upper sealing gland group and is electrically connected with a high-voltage wire so as to be connected to a primary input end or a user load side of the high-voltage circuit breaker; an insulating wrapping tape and insulating glue are wrapped outside the connecting position of the 220kV high-voltage cable and the outlet rod, and insulating oil is filled in a hollow cavity of the high-strength insulating porcelain bushing.
5. The monitoring device for the oil-filled terminal of the high-voltage cable according to claim 1, wherein the control device comprises a data processing unit and a control execution unit, the data processing unit processes monitoring signal data sent by each miniature probe to obtain corresponding monitoring data and compares the corresponding monitoring data with a corresponding protection setting value, and when each monitoring data exceeds the corresponding protection setting value, the control execution unit rapidly trips a high-voltage circuit breaker to cut off the power, so that the 220kV high-voltage cable with a malignant fault at the oil-filled terminal of the cable is isolated from a power grid.
6. The device for monitoring the oil filling terminal of the high-voltage cable according to claim 5, wherein an output end of the multifunctional compound eye detection device is electrically connected with an input end of a data processing unit of the control device, an output end of the data processing unit is connected with an input end of a control execution unit, an output end of the control execution unit is electrically connected with a secondary control trip circuit of the high-voltage circuit breaker, a primary working state of opening or closing of the high-voltage circuit breaker is controlled by the secondary control trip circuit, and the secondary control trip circuit controls an operation mechanism of the high-voltage circuit breaker to act according to an instruction sent by the control execution unit, so that a moving contact of the circuit breaker is rapidly separated from a state of being in close contact with a fixed contact, and a power supply is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022893189.5U CN214539860U (en) | 2020-12-07 | 2020-12-07 | High-voltage cable oil-filling terminal monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022893189.5U CN214539860U (en) | 2020-12-07 | 2020-12-07 | High-voltage cable oil-filling terminal monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214539860U true CN214539860U (en) | 2021-10-29 |
Family
ID=78290684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022893189.5U Active CN214539860U (en) | 2020-12-07 | 2020-12-07 | High-voltage cable oil-filling terminal monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214539860U (en) |
-
2020
- 2020-12-07 CN CN202022893189.5U patent/CN214539860U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2553480B1 (en) | Improvements introduced in monitoring system of dielectric state of high voltage equipments with capacitive insulation, such as condensive bushings, current transformers, potential transformers and similar | |
| CN106771904B (en) | System and method for performing impact test on controllable lightning arrester in extra-high voltage environment based on time sequence | |
| CN204464972U (en) | A kind of arc light protective device | |
| CN106970322B (en) | Dynamic voltage-equalizing test system for quick mechanical switch of hybrid high-voltage direct-current circuit breaker | |
| CN112505507A (en) | Automatic protection device for oil-filled terminal of high-voltage cable | |
| CN214539860U (en) | High-voltage cable oil-filling terminal monitoring device | |
| CN105576621A (en) | Arc light protection method | |
| Tsuboi et al. | Energy absorption capacity of a 500 kV surge arrester for direct and multiple lightning strokes | |
| CN104007354A (en) | Whole-group test circuit and method for 10 kV zinc oxide lightning arrester and cable | |
| CN210490548U (en) | Intelligent high-voltage switch cabinet | |
| CN109509601B (en) | Zhang Bilei resistant ware assembly | |
| Kang et al. | Detection and analysis of internal abnormal heating for high voltage switchgear based on infrared thermometric technology | |
| CN111082392A (en) | Intelligent resonance comprehensive protection device and intelligent resonance elimination method thereof | |
| CN202939278U (en) | Operating mechanism console for isolating switch opening-closing bus charging current test | |
| CN112363010A (en) | Grounding line selection device and monitoring method of nuclear power station neutral point ungrounded system | |
| KR102638522B1 (en) | Blackout prevention system for substation | |
| Tatematsu et al. | Experimental study of lightning and switching surges-induced overvoltages in low-voltage control circuits | |
| Cormenzana et al. | New generation of Smart low-voltage switchgear and controlgear assembly | |
| KR20100058443A (en) | Distributor distinguished ground connection | |
| CN218919596U (en) | Intelligent GIS load switch cabinet for protecting used transformer | |
| CN210323336U (en) | Background monitoring type direct current smoothing reactor lightning arrester counter checking system device | |
| CN117092443B (en) | 10kV transformer area true type test system and true type range test method | |
| CN219678193U (en) | Box transformer monitoring device and circuit breaker | |
| CN217717966U (en) | High-low voltage ride through test system of wind generating set | |
| Pangestu et al. | Impact of line impedance on arc fault characteristics at DC low voltage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |