CN116053070A - Disconnecting link electricity inspection operating rod - Google Patents

Disconnecting link electricity inspection operating rod Download PDF

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Publication number
CN116053070A
CN116053070A CN202211635560.5A CN202211635560A CN116053070A CN 116053070 A CN116053070 A CN 116053070A CN 202211635560 A CN202211635560 A CN 202211635560A CN 116053070 A CN116053070 A CN 116053070A
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CN
China
Prior art keywords
rod
electroscope
knife switch
disconnecting link
insulating
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.)
Pending
Application number
CN202211635560.5A
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Chinese (zh)
Inventor
吕永达
王楚源
黄昇智
石同恒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baise Pingguo Power Supply Bureau Of Guangxi Power Grid Co ltd
Original Assignee
Baise Pingguo Power Supply Bureau Of Guangxi Power Grid Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Baise Pingguo Power Supply Bureau Of Guangxi Power Grid Co ltd filed Critical Baise Pingguo Power Supply Bureau Of Guangxi Power Grid Co ltd
Priority to CN202211635560.5A priority Critical patent/CN116053070A/en
Publication of CN116053070A publication Critical patent/CN116053070A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02Details
    • H01H21/18Movable parts; Contacts mounted thereon
    • H01H21/22Operating parts, e.g. handle
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145Indicating the presence of current or voltage
    • G01R19/155Indicating the presence of voltage
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/54Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention discloses a disconnecting link electricity test operating rod, which comprises a mounting unit and a connecting unit, wherein the mounting unit comprises an insulating rod; the electricity testing unit comprises an acousto-optic electroscope arranged on the insulating rod and an electricity testing component arranged at the top end of the insulating rod and connected with the acousto-optic electroscope; and the connecting unit comprises a connecting component arranged at the bottom end of the insulating rod. The electric operating lever is electrically connected with the acousto-optic electroscope through the electroscope conductive rod head, when the switch is used for changing a hot standby state into a cold standby state, the voltage at two sides of the disconnecting link is detected by the electroscope conductive rod head, after the fact that the voltage at two sides of the disconnecting link is not available is determined, the electroscope conductive rod head is inserted into the disconnecting link to be pulled, so that the disconnecting link is disconnected, and two works of electric inspection and disconnecting of the disconnecting link are completed through one tool.

Description

Disconnecting link electricity inspection operating rod
Technical Field
The invention relates to the technical field of power distribution systems, in particular to a disconnecting link electricity test operating rod.
Background
The existing disconnecting link switch is characterized in that the end part of a rotating shaft is connected with a metal long plate, the whole of the existing disconnecting link switch is T-shaped, two ends of the metal long plate are provided with round holes capable of being inserted, in the process of power transmission/switching operation of a power distribution system, when the switch is switched from hot standby to cold standby, the conventional operation at present is that no voltage is required to be confirmed by using an electroscope, then the disconnecting link is pulled in the round holes of the disconnecting link by using a 10kV insulating operating rod to operate and insert the disconnecting link, in the operation scene, two different tools are required to be used, one is a 10kV high-voltage electroscope, the other is a 10kV insulating operating rod, and in the same operation step, two different tools are frequently used, so that the workload of repair personnel is increased, and the working efficiency is low. Therefore, the invention provides the disconnecting link electricity test operating rod.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the invention, which should not be used to limit the scope of the invention.
In view of the above-mentioned existing when the switch is switched from hot standby to cold standby, the conventional operation at present is to firstly use an electroscope to verify that the two side knife switches are not powered on, then use a 10kV insulating operating rod to operate and pull the two side knife switches open, and in one operation step, two different tools are frequently used, so that the problem of low working efficiency is caused.
Therefore, the invention aims to provide a disconnecting link electricity testing operating rod, which aims to: the two works of electricity checking and knife switch pulling are completed through one tool.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a disconnecting link electricity test operating rod, includes, the installation unit includes the insulator spindle; the electricity testing unit comprises an acousto-optic electroscope arranged on the insulating rod and an electricity testing component arranged at the top end of the insulating rod and connected with the acousto-optic electroscope; and the connecting unit comprises a connecting component arranged at the bottom end of the insulating rod.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the electroscope conductive rod head is arranged at the end of the insulating rod and connected with the acousto-optic electroscope.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the insulating rod comprises a cylindrical rod body and a square extension rod arranged at the end part of the rod body.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the electricity testing component comprises an electricity testing component arranged at the top end of the extension rod and a fixing component arranged on the extension rod in a sliding mode.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the electricity testing component comprises a support rod, a first elastic piece, a conducting strip, a sliding rod and a second elastic piece, wherein the support rod is hinged to the top end of the extension rod, the first elastic piece is arranged between the end part of the support rod and the extension rod, the conducting strip is arranged at the other end of the support rod and connected with the acousto-optic electroscope, the sliding rod is arranged at the end part of the support rod and on the same side with the conducting strip, and the second elastic piece is arranged between the sliding rod and the support rod.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the fixed part comprises a slip ring arranged on the extension rod in a sliding manner, a support plate which is arranged on the slip ring in a rotating manner and is 90 degrees with the support rod, a third elastic piece arranged between the support plate and the extension rod, and a magnetic attraction piece arranged at the end part of the support rod.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the third elastic piece comprises a limit spring arranged at the bottom end of the supporting rod and a supporting block arranged at the end part of the limit spring and propped against the extension rod.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the magnetic attraction piece comprises an isolation cover arranged at the top end of the supporting plate, and a magnetic attraction stone which is arranged inside the isolation cover and penetrates through the isolation cover and the same side of the conducting strip.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the top end of the sliding rod is provided with a sawtooth block, the sawtooth block is inclined in surface, and the side surface of the sawtooth block is concave and is arranged on the same side as the conducting strip.
As a preferable scheme of the disconnecting link electricity testing operating rod, the invention comprises the following steps: the connecting assembly comprises a connecting piece which is arranged at the bottom end of the insulating rod and provided with threads.
The invention has the beneficial effects that: when the switch is used for changing from hot standby to cold standby, the electroscope conductive rod head is used for detecting the voltages at two sides of the disconnecting link, and after the fact that the voltages at two sides of the disconnecting link are not available is determined, the electroscope conductive rod head is inserted into the disconnecting link to be pulled, so that the disconnecting link is disconnected, and two works of electricity inspection and disconnecting of the disconnecting link are completed through a tool.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic diagram of the overall structure of a knife switch electricity testing operation rod according to the first embodiment of the invention.
Fig. 2 is a schematic diagram of the overall structure of a knife switch electroscopic operation rod according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electroscopic component of the disconnecting link electroscopic operating rod of the present invention.
Fig. 4 is a schematic diagram showing a sectional structure of a support rod of the disconnecting link electroscope operating rod of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1, for a first embodiment of the present invention, a knife switch electricity checking operation lever is provided, the device includes a mounting unit 100, an electricity checking unit 200 and a connecting unit 300, wherein the electricity checking unit 200 and the connecting component 301 are mounted on the mounting unit 100, the connecting unit 300 is externally connected with an extension rod 101b, the electricity checking unit 200 is sent to a knife switch, voltage detection is performed on two sides of the knife switch through the electricity checking unit 200, and then the knife switch is disconnected through the electricity checking unit 200.
The mounting unit 100 comprises an insulating rod 101, wherein the insulating rod 101 is made of epoxy resin;
the electricity testing unit 200 comprises an acousto-optic electroscope 201 arranged on the insulating rod 101 and an electricity testing component 202 arranged at the top end of the insulating rod 101 and connected with the acousto-optic electroscope 201; the electroscope assembly 202 includes an electroscope conductive rod head 202a disposed at the end of the insulating rod 101 and electrically connected to the acousto-optic electroscope 201, the electroscope conductive rod head 202a being 80 ° to 100 °, preferably 90 °, to the end of the insulating rod 101.
The connection unit 300 comprises a connection component 301 arranged at the bottom end of the insulating rod 101, the connection component 301 comprises a connection component 301a which is arranged at the bottom end of the insulating rod 101 and is provided with threads, the connection component 301a can be a cylinder internally provided with threads or a cylinder externally provided with threads, an insulating extension operation rod can be externally connected through the connection component 301a, and the electroscope conductive rod head 202a can be lifted to be in contact with a disconnecting link installed at a high position.
In the use process, an insulating extension operation rod can be externally connected through the connecting piece 301a, the electroscope conducting rod head 202a is lifted to be in contact with the knife switch arranged at the high position, the voltage of the knife switches at the two sides is confirmed to be absent through the electroscope conducting rod head 202a, then the electroscope conducting rod head 202a is inserted into the knife switch, and the knife switch is opened to disconnect the knife switch.
Example 2
Referring to fig. 1-4, a second embodiment of the present invention is shown, which differs from the first embodiment in that: the insulating rod 101 includes a rod body 101a having a cylindrical shape, and a square extension rod 101b provided at an end of the rod body 101 a.
The electricity testing assembly 202 comprises an electricity testing component 202b arranged at the top end of the extension rod 101b and a fixing component 202c arranged on the extension rod 101b in a sliding manner;
the electricity testing component 202b comprises a supporting rod 202b-1 hinged at the top end of the extension rod 101b, a first elastic piece 202b-2 arranged between the end part of the supporting rod 202b-1 and the extension rod 101b, a conductive piece 202b-3 arranged at the other end of the supporting rod 202b-1 and connected with the acousto-optic electroscope 201, a sliding rod 202b-4 arranged at the end part of the supporting rod 202b-1 and at the same side with the conductive piece 202b-3, and a second elastic piece 202b-5 arranged between the sliding rod 202b-4 and the supporting rod 202b-1, wherein a mounting groove is formed in the supporting rod 202b-1, the sliding rod 202b-4 and the second elastic piece 202b-5 are positioned in the mounting groove in the supporting rod 202b-1, and the second elastic piece 202b-5 can be made of a spring and a metal elastic piece;
the conductive sheet 202b-3 is wrapped around the perimeter of the support bar 202 b-1; the first elastic member 202b-2 may be made of a metal elastic sheet and a spring, and the position of the support bar 202b-1 is adjusted by the first elastic member 202b-2 to be 80 ° to 100 °, preferably 90 °, with respect to the extension bar 101b.
The fixing part 202c comprises a slip ring 202c-1 which is slidingly arranged on the extension rod 101b, a support plate 202c-2 which is square and rotationally arranged on the slip ring 202c-1 and is arranged at 90 degrees with the support rod 202b-1, a third elastic piece 202c-3 which is in fork shape at one end of the support rod 202b-1, is positioned at two sides of the slip ring 202c-1 and rotationally connected with the slip ring 202c-1 by a hinge shaft and is arranged between the support plate 202c-2 and the extension rod 101b, and a magnetic attraction piece 202c-4 which is arranged at the end part of the support rod 202 b-1;
wherein the fixing part 202c is positioned at the lowest end of the extension rod 101b when the extension rod 101b is lifted, and the conductive sheet 202b-3 in the electricity checking part 202b needs to be positioned outside the top end of the round hole of the metal plate of the knife switch when the magnetic attraction part 202c-4 in the control fixing part 202c is in contact and attraction with the metal plate of the knife switch.
The third elastic piece 202c-3 comprises a limit spring 202c-31 arranged at the bottom end of the support rod 202b-1 and a support block 202c-32 arranged at the end part of the limit spring 202c-31 and propped against the extension rod 101b, wherein the limit spring 202c-31 can enable an included angle to exist between the support plate 202c-2 and the extension rod 101b when the support plate 202c-2 and the magnetic stone 202c-42 rise along with the extension rod 101b, and the support plate 202c-2 is propped up, so that the magnetic stone 202c-42 is convenient to contact and adsorb with a metal plate of the knife switch;
the magnetic attraction piece 202c-4 comprises an isolation cover 202c-41 arranged at the top end of the support plate 202c-2, and a magnetic attraction stone 202c-42 arranged inside the isolation cover 202c-41 and penetrating through the isolation cover 202c-41 and on the same side of the conductive sheet 202b-3, wherein the end part of the magnetic attraction stone 202c-42 exceeds the side edge of the support plate 202c-2 and is positioned between the side edge of the support plate 202c-2 and the end part of the support rod 202 b-1;
the end of the magnet 202c-42 exceeds the side edge of the support plate 202c-2 and is located between the side edge of the support plate 202c-2 and the end of the support rod 202b-1, the extension rod 101b is moved to enable the magnet 202c-42 to contact and adsorb the metal plate of the knife switch, the position of the extension rod 101b is adjusted, a round hole in the metal plate of the knife switch is located below the support rod 202b-1, then the extension rod 101b is moved downwards to enable the support rod 202b-1 to contact the metal plate of the knife switch, the support rod 202b-1 is extruded to enable the support rod 202b-1 to tilt, the tilted support rod 202b-1 can be located between the metal plate of the knife switch and the extension rod 101b, and the extension rod 101b can move downwards smoothly.
The rest of the structure is the same as that of embodiment 1.
In the use process, an insulating extension operation rod can be externally connected through a connecting piece 301a, the extension rod 101b is sent to a knife switch arranged at a high position, when the two ends of the support rod 202b-1 are contacted with the two ends of the knife switch to detect whether voltage exists or not, after the voltage at the two ends is zero, the extension rod 101b is moved, so that the magnet 202c-42 is contacted and adsorbed with a metal plate of the knife switch, the position of the extension rod 101b is adjusted, a round hole on the metal plate of the knife switch is positioned below the support rod 202b-1, then the extension rod 101b is moved downwards to enable the support rod 202b-1 to be in contact with the end part of the metal plate of the knife switch, and the support rod 202b-1 is extruded to tilt, when the support rod 202b-1 is slid downwards to the round hole on the metal plate of the knife switch, the support rod 202b-1 is inserted into the round hole, the extension rod 101b is moved upwards to enable the support rod 202b-1 to be horizontal, meanwhile, the sliding rod 202b-4 is integrally inserted into the round hole, and finally the extension rod 101b is pulled downwards, the extension rod 202b is pulled downwards to be in a state to be tilted downwards, and the bottom end of the support rod 202b-4 is enabled to be in contact with the round hole, and the support rod 101b is tilted downwards, and the extension rod is rotated along with the round hole.
Wherein, the fixing part 202c can be adsorbed and fixed with the knife switch, so that the labor can be saved because the top end is heavy and unstable when the extension rod 101b is lifted; the electric inspection device is fixedly adsorbed to the disconnecting link, so that the extension rod 101b is supported, the electric inspection part 202b can be used for locating a round hole of the disconnecting link switch only by rotating the extension rod 101b at the bottom end, the problem that the extension rod 101b and the electric inspection part 202b are difficult to align with the round hole of the disconnecting link switch due to unstable lifting is avoided, the existing test eye force and arm force are very tested, the electric inspection device is fixedly adsorbed to the disconnecting link, when the electric inspection part 202b is pulled down to disconnect the disconnecting link switch, the electric inspection part 202b can be prevented from shaking and separating from the round hole of the disconnecting link switch, and the extension rod 101b can not shake due to the adsorption fixation and can only slide; the fixing member 202c and the electricity checking member 202b need to be matched to accurately insert the electricity checking member 202b into the circular hole of the knife switch.
Example 3
Referring to fig. 1-4, a third embodiment of the present invention is shown, which differs from the second embodiment in that: the top end of the sliding rod 202b-4 is provided with a sawtooth block 202b-6, the sawtooth block 202b-6 is inclined on the surface, and the side surface is concave and arranged on the same side as the conductive sheet 202 b-3;
when the knife switch is pulled, the support rod 202b-1 is inserted into the round hole, the extension rod 101b is moved upwards to enable the extruded support rod 202b-1 to be horizontal and inserted into the round hole, finally the extension rod 101b is pulled downwards, the support rod 202b-1 contacts and tilts at the bottom end of the round hole in the sliding-out state of the sliding rod 202b-4, the support rod 202b-1 and the sliding rod 202b-4 are clamped in the round hole, the saw-tooth block 202b-6 can increase the obstruction, and when the extension rod is pulled downwards, the magnetic attraction stone 202c-42 can be separated, so that the knife switch is pulled and closed smoothly.
The rest of the structure is the same as that of embodiment 2.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a disconnecting link electricity test action bars which characterized in that: comprising the steps of (a) a step of,
a mounting unit (100) including an insulating rod (101);
the electricity testing unit (200) comprises an acousto-optic electroscope (201) arranged on the insulating rod (101) and an electricity testing component (202) arranged at the top end of the insulating rod (101) and connected with the acousto-optic electroscope (201); the method comprises the steps of,
the connecting unit (300) comprises a connecting assembly (301) arranged at the bottom end of the insulating rod (101).
2. The knife switch electroscopic lever of claim 1 wherein: the electroscope assembly (202) comprises an electroscope conducting rod head (202 a) which is arranged at the end part of the insulating rod (101) and connected with the acousto-optic electroscope (201).
3. The knife switch electroscopic lever of claim 1 wherein: the insulating rod (101) comprises a cylindrical rod body (101 a) and a square extension rod (101 b) arranged at the end part of the rod body (101 a).
4. A knife switch electroscopic lever according to claim 3 and wherein: the electricity testing assembly (202) comprises an electricity testing component (202 b) arranged at the top end of the extension rod (101 b), and a fixing component (202 c) arranged on the extension rod (101 b) in a sliding mode.
5. The knife switch electroscopic lever of claim 4 wherein: the electricity testing component (202 b) comprises a supporting rod (202 b-1) hinged to the top end of the extension rod (101 b), a first elastic piece (202 b-2) arranged between the end part of the supporting rod (202 b-1) and the extension rod (101 b), a conducting strip (202 b-3) arranged at the other end of the supporting rod (202 b-1) and connected with the acousto-optic electroscope (201), a sliding rod (202 b-4) arranged at the end part of the supporting rod (202 b-1) and on the same side as the conducting strip (202 b-3), and a second elastic piece (202 b-5) arranged between the sliding rod (202 b-4) and the supporting rod (202 b-1).
6. The knife switch electroscopic lever of claim 5 wherein: the fixing part (202 c) comprises a slip ring (202 c-1) arranged on the extension rod (101 b) in a sliding manner, a support plate (202 c-2) which is arranged on the slip ring (202 c-1) in a rotating manner and is 90 degrees with the support rod (202 b-1), a third elastic piece (202 c-3) arranged between the support plate (202 c-2) and the extension rod (101 b), and a magnetic attraction piece (202 c-4) arranged at the end part of the support rod (202 b-1).
7. The knife switch electroscopic lever of claim 6 wherein: the third elastic piece (202 c-3) comprises a limit spring (202 c-31) arranged at the bottom end of the supporting rod (202 b-1), and a supporting block (202 c-32) arranged at the end part of the limit spring (202 c-31) and propped against the extension rod (101 b).
8. The knife switch electroscopic lever of claim 6 or 7 wherein: the magnetic attraction piece (202 c-4) comprises an isolation cover (202 c-41) arranged at the top end of the supporting plate (202 c-2), and a magnetic attraction stone (202 c-42) which is arranged inside the isolation cover (202 c-41) and penetrates through the isolation cover (202 c-41) to be on the same side with the conductive sheet (202 b-3).
9. The knife switch electricity test operating lever according to any one of claims 5 to 7, characterized in that: the top end of the sliding rod (202 b-4) is provided with a sawtooth block (202 b-6), the sawtooth block (202 b-6) is inclined in surface, and the side surface is concave and is on the same side as the conductive sheet (202 b-3).
10. The knife switch electricity test operating lever according to any one of claims 1 to 9, characterized in that: the connecting component (301) comprises a connecting piece (301 a) which is arranged at the bottom end of the insulating rod (101) and provided with threads.
CN202211635560.5A 2022-12-19 2022-12-19 Disconnecting link electricity inspection operating rod Pending CN116053070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211635560.5A CN116053070A (en) 2022-12-19 2022-12-19 Disconnecting link electricity inspection operating rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211635560.5A CN116053070A (en) 2022-12-19 2022-12-19 Disconnecting link electricity inspection operating rod

Publications (1)

Publication Number Publication Date
CN116053070A true CN116053070A (en) 2023-05-02

Family

ID=86119280

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211635560.5A Pending CN116053070A (en) 2022-12-19 2022-12-19 Disconnecting link electricity inspection operating rod

Country Status (1)

Country Link
CN (1) CN116053070A (en)

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