CN220358490U - Signal transmission equipment and electric energy transmission equipment - Google Patents
Signal transmission equipment and electric energy transmission equipment Download PDFInfo
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- CN220358490U CN220358490U CN202321480988.7U CN202321480988U CN220358490U CN 220358490 U CN220358490 U CN 220358490U CN 202321480988 U CN202321480988 U CN 202321480988U CN 220358490 U CN220358490 U CN 220358490U
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- 230000008054 signal transmission Effects 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 claims 2
- 238000004904 shortening Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000012212 insulator Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
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Abstract
The utility model discloses electric energy and signal transmission equipment, belongs to the technical field of electric energy and signal transmission, and is used for completing extension and shortening of an electric energy transmission line and a signal line under the environment of continuous electric energy and continuous signal. According to the utility model, the first connecting device, the second connecting device and the third connecting device are arranged on the signal acquisition equipment, the first connecting wire, the second connecting wire and the third connecting wire are connected, and the second connecting wire and the third connecting wire are connected with and detached from the first connecting device, the second connecting device and the third connecting device, so that the extension and the shortening of the electric energy transmission line and the signal line are completed, and the extension and the shortening of the electric energy transmission line and the signal line are completed under the environment of continuous electric energy and signal.
Description
Technical Field
The utility model belongs to the technical field of electric energy and signal transmission, and is used for completing extension and shortening of an electric energy transmission line and a signal line under the environment of uninterrupted power and continuous signals, in particular to signal transmission equipment and electric energy transmission equipment.
Background
The transmission of signals is mainly divided into two types, namely wire transmission and wireless transmission, wherein the wire transmission can be divided into analog signal transmission, digital electric signal transmission and digital optical signal transmission, and the analog signal transmission and the digital electric signal transmission are completed through wires; power delivery refers to a manner in which power is delivered from one location to another by a power plant or source. In civil and industrial production sites, the related parameters of the site are required to be monitored, collected and transmitted in real time, the monitoring, the collection and the transmission cannot be interrupted, and meanwhile, the electric energy of equipment used in the site cannot be interrupted; however, in practice, the cables of the power supply and the signal need to be lengthened or shortened along with the change of the site, and when the cables of the power supply and the signal are lengthened or shortened at present, the cables can only be detached from the junction box, and the lengthened or shortened cables can be used for re-supplying power, monitoring and collecting recovery parameters, transmitting and transmitting electric energy after being connected.
Disclosure of Invention
The utility model aims to provide signal and electric energy transmission equipment, which solves the problem that lengthening and shortening of a power supply and a signal cable cannot be completed in a power supply and signal communication state in the related art.
In order to solve the technical problem, according to a first aspect of the present utility model, there is provided a signal transmission apparatus, including a signal acquisition apparatus, a first connection device, a second connection device and a third connection device are provided on the signal acquisition apparatus, the signal acquisition apparatus is detachably connected with the first connection device through a first connection line, the first connection device is detachably connected with the second connection device through a second connection line, the third connection device is detachably connected with the first connection device and the second connection device through a third connection line, wherein the second connection line is a relay line, the third connection line is two groups, the relay line is connected with the first connection device and the third connection device, and the extension line is connected with the third connection device and the second connection device.
The first connecting device, the second connecting device and the third connecting device respectively comprise junction boxes, conductive connecting pieces are respectively arranged in the junction boxes, the conductive connecting pieces are arranged in an insulating mode with the junction boxes, and the first connecting line, the second connecting line and the third connecting line are respectively detachably connected with the conductive connecting pieces.
Further, more than 3 threaded holes and bolts are respectively arranged on each conductive connecting piece, and the first connecting wire, the second connecting wire and the third connecting wire are detachably connected with the conductive connecting pieces through bolts in the threaded holes respectively.
The plurality of conductive connecting pieces are arranged in the junction box, and the adjacent conductive connecting pieces are insulated and separated.
According to a second aspect of the utility model, an electric energy transmission device is provided, and the electric energy transmission device comprises a power supply device, wherein a first connecting device, a second connecting device and a third connecting device are arranged on the power supply device, the power supply device is detachably connected with the first connecting device through a first connecting wire, the first connecting device is detachably connected with the second connecting device through a second connecting wire, the third connecting device is detachably connected with the first connecting device and the second connecting device through a third connecting wire respectively, the second connecting wire is a relay wire, the third connecting wires are two groups, the relay wire is connected with the first connecting device and the third connecting device, and the extension wire is connected with the third connecting device and the second connecting device.
The first connecting device, the second connecting device and the third connecting device respectively comprise junction boxes, conductive connecting pieces are respectively arranged in the junction boxes, the conductive connecting pieces are arranged in an insulating mode with the junction boxes, and the first connecting line, the second connecting line and the third connecting line are respectively detachably connected with the conductive connecting pieces.
Further, the conductive connecting piece is respectively provided with more than 3 threaded holes and bolts, and the first connecting wire, the second connecting wire and the third connecting wire are respectively connected with the conductive connecting piece through the bolts in the threaded holes.
The plurality of conductive connecting pieces are arranged in the junction box, and the adjacent conductive connecting pieces are insulated and separated.
Compared with the prior art, the utility model has the following advantages:
the signal acquisition equipment is detachably connected with the first connecting device through a first connecting wire, the first connecting device is detachably connected with the second connecting device through a second connecting wire, the first connecting device is detachably connected with the third connecting device through a third connecting wire, and the second connecting device is connected with a rear-end signal receiving end. When the signal wire is extended, the second connecting device and the third connecting device are detachably connected by using an extension wire, then the second connecting wire is detached from the wire inlet end of the second connecting device, at the moment, the first connecting device, the third connecting device and the second connecting device are sequentially connected in series, so that the first signal wire extension is completed, the second connecting wire is connected with an external connecting device, and preparation is made for the next signal wire extension; and the external connecting device is detachably connected with the wire inlet end of the third connecting device by utilizing the extension wire, then the third connecting wire is detached from the wire inlet end of the third connecting device, at the moment, the first connecting device, the external connecting device, the third connecting device and the second connecting device are sequentially connected in series, so that the second extension of the signal wire is completed, and the third connecting wire is connected with the other external connecting device to prepare for the extension of the next signal wire. The signal line shortening process is the inverse process of signal line extension, and will not be described here again.
The power supply equipment is detachably connected with the first connecting device through the first connecting wire, the first connecting device is detachably connected with the second connecting device through the second connecting wire, the first connecting device is detachably connected with the third connecting device through the third connecting wire, and the second connecting device is connected with the rear-end load. When the electric energy transmission line is extended, the second connecting device and the third connecting device are detachably connected by using the extension line, then the second connecting line is detached from the wire inlet end of the second connecting device, at the moment, the first connecting device, the third connecting device and the second connecting device are sequentially connected in series, so that the first electric energy transmission line extension is completed, and the second connecting line is connected with the external connecting device to prepare for the next electric energy transmission line extension; and the external connecting device is detachably connected with the wire inlet end of the third connecting device by utilizing the extension wire, then the third connecting wire is detached from the wire inlet end of the third connecting device, at the moment, the first connecting device, the external connecting device, the third connecting device and the second connecting device are sequentially connected in series, so that the second extension of the electric energy transmission wire is completed, and the third connecting wire is connected with the other external connecting device to prepare for the extension of the next electric energy transmission wire. The electric power transmission line shortening process is the reverse process of electric power transmission line extension, and is not described herein.
According to the utility model, each conductive connecting piece is provided with 3 or more threaded holes and bolts, so that two connecting wires are not connected to the same threaded hole and bolt at the same time during each wiring or dismounting, and the transmission line interruption during operation is avoided.
Drawings
Fig. 1 is a schematic diagram of a signal transmission device in the present embodiment;
fig. 2 is a schematic diagram of a signal transmission device after first expansion in the present embodiment;
fig. 3 is a schematic diagram of a signal transmission device after the second expansion in the present embodiment;
fig. 4 is a schematic diagram of an electric energy transmission device in the present embodiment;
fig. 5 is a schematic diagram of the power transmission device after the first expansion in the present embodiment;
fig. 6 is a schematic diagram of the power transmission device after the second expansion in the present embodiment;
in the figure, a second connecting device 1, a second connecting wire 2, a first connecting device 3, signal acquisition equipment 4, a first connecting wire 5, a third connecting wire 6, a third connecting device 7, a conductive connecting piece 8, power supply equipment 9, an external connecting device 10 a and an external connecting device 11 b are arranged.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Example 1
As shown in fig. 1 to 3, the present embodiment provides a signal transmission device, including a signal acquisition device 4, where the signal acquisition device 4 is provided with a first connection device 3, a second connection device 1 and a third connection device 7, the signal acquisition device 4 is detachably connected with the first connection device 3 through a first connection line 5, the first connection device 3 is detachably connected with the second connection device 1 through a second connection line 2, and the third connection device 7 is detachably connected with the first connection device 3 and the second connection device 1 through a third connection line 6, where the second connection line 2 is a relay line, the third connection line 6 is two groups, the connection between the first connection device 3 and the third connection device 7 is a relay line, and the connection between the third connection device 7 and the second connection device 1 is a extension line; when the signal wire needs to be extended, only two lengthened third connecting wires 6 are connected with a third connecting device 7 and a second connecting device 1 respectively, a relay wire of the third connecting wires 6 is connected with a first connecting device 3 and a second connecting device 1 respectively, then the second connecting wire 2 between the first connecting device 3 and the second connecting device 1 is detached, and signals acquired by the signal acquisition equipment 4 are sequentially transmitted to the third connecting device 7 and the second connecting device 1 through the first connecting device 3 and transmitted to the rear end, so that the extension of the signal wire is completed; when the signal is shortened, only two ends of the second connecting wire 2 are respectively connected with the first connecting device 3 and the second connecting device 1, then the two third connecting wires 6 on the third connecting device 7 are detached, the signal acquired by the signal acquisition equipment 4 is transmitted to the second connecting device 1 through the first connecting device 3 and is transmitted to the rear end, the shortening of the signal wire is completed, and the shortening of the signal wire is completed under the environment of continuous signals.
Referring to fig. 2 and 3, in the implementation, three connecting devices are respectively arranged on the signal acquisition device 4 and used for completing extension and shortening of a transmission line of the signal acquisition device 4, the three connecting devices respectively comprise a first connecting device 3, a second connecting device 1 and a third connecting device 7, the first connecting device 3 is connected with the signal acquisition device 4 through a first connecting line 5, and the connecting modes are connected in a detachable mode, so that the installation and the later disassembly are convenient; the first connecting device 3 comprises a junction box, wherein the junction box is a plastic junction box, two conductive connecting pieces 8 are arranged in the junction box, and the two conductive connecting pieces 8 are arranged in an insulating manner with the junction box and are isolated from the junction box in an insulating manner; the two conductive connecting pieces 8 are conductive copper sheets or other conductive metals, and more than 3 threaded holes are respectively arranged on the two conductive connecting pieces 8. The first connecting wire 5 is electrically connected with the signal acquisition equipment 4, and the other end of the first connecting wire 5 is connected with the wire inlet end of the junction box, namely, one end of a conductive connecting piece 8 arranged in the junction box; the second connecting device 1 is connected with the first connecting device 3 through a second connecting wire 2, and the second connecting device 1 has the same structure as the first connecting device 3; the third connecting device 7 is also the same in structure as the first connecting device 3 and the second connecting device 1; the outlet end of the second connecting device 1 is in signal connection with the rear end through a signal wire; the wire inlet end and the wire outlet end of the third connecting device 7 are respectively provided with a third connecting wire 6, the third connecting wires 6 are in two groups, two ends of one group of the third connecting wires 6 are respectively detachably connected with the wire outlet end of the first connecting device 3 and the wire inlet end of the third connecting device 7, and the third connecting wires 6 are used as relay wires; the signal acquisition equipment 4 is provided with a first connecting device 3, a second connecting device 1 and a third connecting device 7 which are connected through a first connecting wire 5, a second connecting wire 2 and a third connecting wire 6, so that signal transmission between the signal acquisition equipment 4 and the rear end is completed, and the shortening and the extension of a signal transmission line are completed by adjusting the connection and the disassembly modes of the second connecting wire 2 and the third connecting wire 6 and the first connecting device 3, the second connecting device 1 and the third connecting device 7, so that the signal transmission line is extended and shortened under the continuous signal environment.
As shown in fig. 2 and 3, when the signal line is extended, the second connecting device 1 and the third connecting device 7 are detachably connected by using the extension line, then the second connecting wire 2 is detached from the wire inlet end of the second connecting device 1, at this time, the first connecting device 5, the third connecting device 7 and the second connecting device 1 are sequentially connected in series, so as to complete the first signal line extension, and the second connecting wire 2 is connected with the external connecting device a10 to prepare for the next signal line extension; the external connecting device a10 is detachably connected with the wire inlet end of the third connecting device 7 by using an extension wire, and the third connecting wire 6 is detached from the wire inlet end of the third connecting device 7, at this time, the first connecting device 3, the external connecting device a10, the third connecting device 7 and the second connecting device 1 are sequentially connected in series, so that the second extension of the signal wire is completed, and the third connecting wire 6 is connected with the other external connecting device b11, so as to prepare for the extension of the next signal wire. The signal line shortening process is the inverse process of signal line extension, and a one-time shortening is taken as an example here: referring to fig. 2-1, the second connecting wire 2 is connected to the second connecting device 1 and the first connecting device 3, and the extension line between the second connecting device 1 and the third connecting device 7 is removed, so that the signal line is shortened.
Example 2
As shown in fig. 4 to 6, the present embodiment provides an electric energy transmission device, including a power supply device 9, where the power supply device 9 is provided with a first connection device 3, a second connection device 1 and a third connection device 7, the power supply device 9 is detachably connected with the first connection device 3 through a first connection line 5, the first connection device 3 is detachably connected with the second connection device 1 through a second connection line 2, and the third connection device 7 is detachably connected with the first connection device 3 and the second connection device 1 through a third connection line 6, where the second connection line 2 is a relay line, the third connection line 6 is two groups, the connection between the first connection device 3 and the third connection device 7 is a relay line, and the connection between the third connection device 7 and the second connection device 1 is a extension line; when the electric energy transmission line needs to be extended, only two lengthened third connecting wires 6 are connected with the third connecting device 7 and the second connecting device 1 respectively, then the second connecting wire 2 between the first connecting device 3 and the second connecting device 1 is detached, and the electric energy of the power supply equipment 9 is sequentially transmitted to the third connecting device 7 and the second connecting device 1 through the first connecting device 3 and is transmitted to the power utilization terminal for use, so that the extension of the electric energy transmission line is completed; when the power is reduced, only two ends of the second connecting wire 2 are connected with the first connecting device 3 and the second connecting device 1 respectively, then the two third connecting wires 6 connecting the third connecting device 7 and the second connecting device 1 are detached, the power supply equipment 9 transmits power to the second connecting device through the first connecting device 3 to complete power supply of the power utilization terminal, further the reduction of the power transmission line is completed, and the reduction of the power transmission line is completed under the uninterrupted power environment.
Referring to fig. 5 and 6, in the implementation, three connection devices are respectively disposed on the power supply device 9, for completing extension and shortening of the power transmission line of the power supply device 9, where the three connection devices respectively include a first connection device 3, a second connection device 1 and a third connection device 7, the first connection device 3 is connected with the power supply device 9 through the first connection line 5, and the connection manner is connected in a detachable manner, so as to facilitate installation and later disassembly; the first connecting device 3 comprises a junction box, wherein the junction box is a plastic junction box, two conductive connecting pieces 8 are arranged in the junction box, and the two conductive connecting pieces 8 are arranged in an insulating way with the junction box and are separated by an insulating space to avoid short circuit; the two conductive connecting pieces 8 are conductive copper sheets or other conductive metals, and more than 3 threaded holes are respectively arranged on the two conductive connecting pieces 8. The first connecting device 3 is connected with the second connecting device 1 through a second connecting wire 2, the outlet end of the second connecting device 1 is connected with an electric load, and the first connecting device 3 is also connected with a third connecting device 7 through a third connecting wire 6. Wherein the second connecting device 1 and the first connecting device 3 have the same structure; the third connecting device 7 has the same structure as the first connecting device 3; the third connecting wires 6 are respectively arranged on the wire inlet end and the wire outlet end of the third connecting device 7, the third connecting wires 6 are two groups, one group of the third connecting wires 6 is used as a relay wire and is detachably connected with the wire outlet end of the first connecting device 3 and the wire inlet end of the third connecting device 7 respectively, the second group of the third connecting wires 6 is an extension wire, and the extension and the shortening of the transmission wire of the power supply equipment 9 are completed by adjusting the connection modes of the second connecting wires 2 and the third connecting wires 6 with the first connecting device 3, the second connecting device 1 and the third connecting device 7, so that the extension and the shortening of the electric energy transmission wire are completed under the uninterrupted power environment.
When the electric energy transmission line on the power supply equipment 9 is extended, the second connecting device 1 and the third connecting device 7 are detachably connected by using an extension line (namely the second group of third connecting lines 6), then the second connecting line 2 is detached from the wire inlet end of the second connecting device 1, at the moment, the first connecting device 3, the third connecting device 7 and the second connecting device 1 are sequentially connected in series to finish the extension of the first electric energy transmission line, and the second connecting line 2 is connected with the external connecting device a10 to prepare for the extension of the next electric energy transmission line; the external connecting device a10 and the wire inlet end of the third connecting device 7 are detachably connected by using an extension wire, then the third connecting wire 6 is detached from the wire inlet end of the third connecting device 7, at this time, the first connecting device 3, the external connecting device a10, the third connecting device 7 and the second connecting device 1 are sequentially connected in series, the second extension of the electric energy transmission wire is completed, the third connecting wire is connected with the external connecting device b11, preparation is made for the extension of the next electric energy transmission wire, and the extension of the electric energy transmission wire is completed under the environment without power failure. The power transmission line shortening process is the reverse process of power transmission line extension, and is described herein by taking one shortening as an example: referring to fig. 5-4, the second connection wire 2 is connected to the second connection device 1 and the first connection device 3, and then the extension wire between the second connection device 1 and the third connection device 7 is removed, thereby achieving the reduction of the power transmission wire.
It is further understood that, in the above embodiment, the first connecting device 3, the second connecting device 1 and the third connecting device 7 are provided on the power supply apparatus 9 as a group, that is, when the power supply apparatus 9 needs to complete the expansion and the reduction of the power transmission line in cooperation with the first connecting device 3, the second connecting device 1 and the third connecting device 7, and needs to expand the power transmission line, only the number of the second connecting device 1 and the third connecting device 7 (i.e. the external connecting device a10 or the external connecting device b 11) needs to be increased again on the original first connecting device 3, the second connecting device 1 and the third connecting device 7, and multiple expansion is completed by adjusting the connection mode of the second connecting line 2 and the third connecting line 6; when the electric energy transmission line is shortened, the electric energy transmission line is only required to be reversely connected in an extension wiring mode, and the extension and shortening principles are the same as the above principles and are not explained here; meanwhile, the number of the conductive connecting pieces 8 positioned in the junction boxes used on the first connecting device 3, the second connecting device 1 and the third connecting device 7 can be multiple, and the number of the conductive connecting pieces 8 is matched with the ports of the electric energy transmission lines, so that the purpose of simultaneously extending and shortening the electric energy transmission lines is achieved.
With the above embodiment, it is further understood that the conductive connecting piece 8 arranged in the junction box is insulated from the junction box, so as to avoid electric leakage and short circuit, and is suitable for transmitting low-voltage energy; a ceramic insulator is arranged in the junction box, a certain interval is arranged between adjacent ceramic insulators, and a conductive connecting piece 8 is arranged on the ceramic insulator and used for completing high-voltage electric energy transmission; the ceramic insulator adopts a circuit porcelain cross arm insulator, the lower end of the circuit porcelain cross arm insulator is fixedly connected with the bottom of the junction box, the conductive connecting piece 8 is arranged on the upper part of the circuit porcelain cross arm insulator, high-voltage electric energy transmission is completed, and the wiring mode is the same as the principle and is not explained here.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (6)
1. The utility model provides a signal transmission equipment, its characterized in that, includes signal acquisition equipment, be provided with first connecting device, second connecting device and third connecting device on the signal acquisition equipment, signal acquisition equipment through first connecting wire with first connecting device can dismantle the connection, first connecting device through the second connecting wire with second connecting device can dismantle the connection, third connecting device through the third connecting wire respectively with first connecting device and second connecting device can dismantle the connection, wherein, the second connecting wire is the relay, the third connecting wire is two sets of, is the relay with first connecting device and third connecting device connection, is the extension line with third connecting device and second connecting device connection.
2. The signal transmission device according to claim 1, wherein the first connecting means, the second connecting means and the third connecting means comprise junction boxes respectively, conductive connecting members are respectively provided in the junction boxes, each of the conductive connecting members is provided with at least 3 screw holes and bolts for fixing connecting wires respectively, the conductive connecting members are arranged in an insulating manner with the junction boxes, and the first connecting wires, the second connecting wires and the third connecting wires are detachably connected with the conductive connecting members respectively through bolts in the screw holes.
3. The signal transmission device of claim 2, wherein a plurality of said conductive connectors are provided, each of said plurality of said conductive connectors being disposed within said junction box, and wherein adjacently disposed conductive connectors are spaced apart by insulation.
4. The utility model provides an electric energy transmission equipment, its characterized in that, includes power supply equipment, be provided with first connecting device, second connecting device and third connecting device on the power supply equipment, power supply equipment through first connecting wire with first connecting device can dismantle the connection, first connecting device through the second connecting wire with second connecting device can dismantle the connection, third connecting device through the third connecting wire respectively with first connecting device and second connecting device can dismantle the connection, wherein, the second connecting wire is the relay, the third connecting wire is two sets of, is the relay with first connecting device and third connecting device connection, is the extension line with third connecting device and second connecting device connection.
5. The power transmission apparatus according to claim 4, wherein the first connection means, the second connection means, and the third connection means each include a junction box, conductive connection members are provided in the junction boxes, respectively, each of the conductive connection members is provided with 3 or more screw holes and bolts, respectively, the conductive connection members are provided with the junction box in an insulating manner, and the first connection lines, the second connection lines, and the third connection lines are connected with the conductive connection members through the bolts in the screw holes, respectively.
6. The power transmission device of claim 5, wherein a plurality of said conductive connectors are provided, a plurality of said conductive connectors are provided in said junction box, and adjacently disposed conductive connectors are spaced apart from each other by insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321480988.7U CN220358490U (en) | 2023-06-12 | 2023-06-12 | Signal transmission equipment and electric energy transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321480988.7U CN220358490U (en) | 2023-06-12 | 2023-06-12 | Signal transmission equipment and electric energy transmission equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220358490U true CN220358490U (en) | 2024-01-16 |
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ID=89484630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321480988.7U Active CN220358490U (en) | 2023-06-12 | 2023-06-12 | Signal transmission equipment and electric energy transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220358490U (en) |
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2023
- 2023-06-12 CN CN202321480988.7U patent/CN220358490U/en active Active
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