CN111725637A - Handle type low-voltage grounding rod - Google Patents

Handle type low-voltage grounding rod Download PDF

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Publication number
CN111725637A
CN111725637A CN202010398245.XA CN202010398245A CN111725637A CN 111725637 A CN111725637 A CN 111725637A CN 202010398245 A CN202010398245 A CN 202010398245A CN 111725637 A CN111725637 A CN 111725637A
Authority
CN
China
Prior art keywords
handle
rod
spring
insulating
grounding
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
CN202010398245.XA
Other languages
Chinese (zh)
Inventor
廖奉怡
罗福健
周子皓
胡耀方
陈浩昆
卢伟斌
陈晓
刘瑞强
伍敬文
林文涛
欧阳璇
潘颖瑜
张薇
梅仲涛
李杰聪
关倩莹
詹振宇
谭润开
黄钊能
吴柏涛
张开轩
陈锦彪
李浩成
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.)
Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
Original Assignee
Guangdong Power Grid Co Ltd
Foshan Power Supply Bureau of Guangdong Power Grid Corp
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 Guangdong Power Grid Co Ltd, Foshan Power Supply Bureau of Guangdong Power Grid Corp filed Critical Guangdong Power Grid Co Ltd
Priority to CN202010398245.XA priority Critical patent/CN111725637A/en
Publication of CN111725637A publication Critical patent/CN111725637A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12End pieces terminating in an eye, hook, or fork
    • H01R11/14End pieces terminating in an eye, hook, or fork the hook being adapted for hanging on overhead or other suspended lines, e.g. hot line clamp
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28Clamped connections, spring connections
    • H01R4/48Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4854Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
    • H01R4/4863Coil spring
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66Connections with the terrestrial mass, e.g. earth plate, earth pin
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B3/00Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear

Abstract

The invention provides a handle type low-voltage grounding rod which comprises a handle, an insulating rod, an insulating cylinder, a metal component, a movable clamping piece, a buckling plate and a pressing piece, wherein the handle is arranged on the insulating rod; the insulating cylinder is axially provided with a through hole, the insulating rod penetrates through the through hole, and two ends of the insulating rod extend out of the insulating cylinder; one side of the metal component is provided with a through hole, and one end of the insulating rod penetrates through the through hole of the metal component and is connected with the movable clamping piece; a grounding part is arranged outside the metal component; the handle is fixed on one end of the insulating cylinder, which is far away from the metal component, and is also connected with the pressing sheet; the pressing sheet is arranged in the insulating cylinder, the pressing sheet is provided with a hole, and the insulating rod penetrates through the hole of the pressing sheet; one end of the buckle plate is connected with the handle, the buckle plate is provided with a hole, and the insulating rod penetrates through the hole of the buckle plate. According to the handle type low-voltage grounding rod provided by the invention, the insulating rod is moved by opening and closing the handle, so that the movable clamping piece is controlled to gradually compress the grounding circuit, the closing speed is effectively accelerated, the positioning of a metal member is easier to control, the operation is more convenient, and the working efficiency is increased.

Description

Handle type low-voltage grounding rod
Technical Field
The invention relates to the field of electric power overhaul, in particular to a handle type low-voltage grounding rod.
Background
The low-voltage grounding rod is a safety tool for preventing personal injury caused by reverse power transmission when low-voltage equipment and a low-voltage line are overhauled in a power failure mode. In the old low-voltage grounding rod, metal is constructed on the top of an insulating rod and connected with a grounding wire, an operating part is arranged at the bottom of the insulating rod, and during operation, the operating part of the insulating rod is rotated to control the tightness of a metal component, so that the metal component is in close contact with maintenance equipment or lines, and the grounding purpose is achieved.
Because the weight of the metal component of the old low-voltage grounding rod is heavier at the top of the insulating rod, and the weight of the operation part is lighter, the gravity center of the old low-voltage grounding rod deviates to the top, the operation part of the insulating rod needs to be rotated by two hands during grounding operation, the position of the metal component is difficult to fix during grounding operation, and great labor and time are needed for completing the operation every time. And the metal component has to rotate the insulating rod for about 5 circles every 1 cm of opening and closing stroke, so the operation is slow.
Disclosure of Invention
The invention provides a convenient handle type low-voltage grounding rod for overcoming at least one defect in the prior art.
The present invention aims to solve the above technical problem at least to some extent.
The invention aims to solve the problems of inconvenient and time-consuming operation of the existing low-voltage grounding rod so as to improve the working efficiency.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a handle type low-voltage grounding rod is characterized by comprising a handle, an insulating rod, an insulating cylinder, a metal component, a movable clamping piece, a buckling plate and a pressing piece; the insulation cylinder is axially provided with a through hole, the insulation rod penetrates through the through hole, and two ends of the insulation rod extend out of the insulation cylinder; one side of the metal component is provided with a through hole, and one end of the insulating rod penetrates through the through hole of the metal component and is connected with the movable clamping piece; a grounding part is arranged outside the metal component; the handle is fixed on one end of the insulating cylinder, which is far away from the metal component, and is also connected with the pressing sheet; the pressing sheet is arranged inside the insulation cylinder, the pressing sheet is provided with a hole, and the insulation rod penetrates through the hole of the pressing sheet; one end of the buckle plate is connected with the handle, the buckle plate is provided with a hole, and the insulating rod penetrates through the hole of the buckle plate.
When in operation, a worker holds the handle with one hand and holds the insulating cylinder with the other hand, so that the problem of unstable gravity center of the old grounding rod is solved, and the metal member is easier to position. The pressing sheet is driven by a worker to move back and forth through the back and forth movable handle, when the pressing sheet moves forward, the pressing sheet is contacted with the insulating rod and drives the insulating rod to move forward, and at the moment, the insulating rod is loosened by the pinch plate; when the pressing sheet moves backwards, the insulating rod can be loosened without generating acting force, and the insulating rod is prevented from moving backwards by the buckle plate fastening the insulating rod; when the insulating rod moves forwards, the movable clamping piece is driven to move, and the movable clamping piece and the metal component fasten a circuit to be grounded so as to achieve the purpose of grounding; when the maintenance is finished, the insulating rod can move backwards only by opening the pinch plate. Through above-mentioned working method, the insulator spindle removes when moving to a direction to the handle, and the insulator spindle is motionless when moving to another direction to the handle, and the removal of insulator spindle all drives the corresponding removal of activity clamping piece at every turn, so both steerable activity clamping piece compress tightly the ground connection step by step, and is easy and simple to handle.
Further, the handle comprises a movable part and a fixed part; the fixing part is fixed on the insulating cylinder and is also connected with one end of the pinch plate; the movable part is connected with the fixed part and the lower end of the pressing sheet. Through setting up fixed part and movable part, make things convenient for personnel's operation more.
Furthermore, a guide convex strip is arranged in the metal component, and a groove matched with the guide convex strip is arranged on the movable clamping piece. The movable clamping piece slides according to the guide convex strip, and the movement track is fixed and is easier to control.
Further, the grounding part comprises a grounding bolt, a grounding nut and a grounding through hole, the grounding bolt penetrates through the grounding through hole to be matched with the grounding nut, and the ground wire is fixed on the outer side of the metal component through the bolt and the nut.
Further, the handle is also provided with a first spring which is a compression spring; one end of the first spring is connected with the fixed part, and the other end of the first spring is connected with the movable part. When the handle is closed and the hand is loosened, the movable part is opened by the elasticity of the first spring, manual operation is not needed, and the use is convenient.
Furthermore, the handle type low-voltage grounding rod also comprises a second spring and a fixed baffle piece which are arranged in the insulating cylinder, wherein the second spring is a compression spring; the insulating rod penetrates through the second spring; one end of the second spring is connected with the pressing sheet, and the other end of the second spring is connected with the fixed baffle; the fixed separation blade is fixed inside the insulating cylinder. When the handle is held tightly, the movable part of the handle drives the pressing sheet to move, and the pressing sheet generates a certain included angle with the vertical direction due to the pressure of the lower end of the pressing sheet on the movable part and presses the insulating rod to move forwards; when the handle is released, the movable part moves backwards, the pressure on the pressing sheet disappears, and the pressing sheet returns to the vertical state and moves backwards due to the elastic force of the second spring.
Furthermore, the handle type low-voltage grounding rod also comprises a third spring, wherein the third spring is a compression spring; one end of the third spring is connected with the pinch plate, and the other end of the third spring is connected with the fixing part. When the insulating rod moves forwards, the pinch plate can compress the third spring and loosen the insulating rod; when the insulating rod stops moving forwards, the buckle plate has a tendency of rotating because of the elastic force of the third spring and generates a force for fastening the insulating rod, so that the insulating rod cannot move backwards; if the third spring is compressed by pressing the buckle plate all the time, the insulating rod can move backwards, and the use process is convenient.
Furthermore, the insulating rod is made of glass fiber reinforced plastic epoxy resin materials, and is high in pressure resistance and strength.
Furthermore, the insulating cylinder outside is provided with the handle, conveniently carries.
Furthermore, the grounding nut is a locknut, so that the grounding wire is prevented from loosening.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
according to the handle type low-voltage grounding rod, the insulating rod is moved through the opening and closing of the handle, so that the movable clamping pieces are controlled to gradually compress the grounding circuit, and the closing speed is effectively accelerated; compared with the traditional rotary grounding rod, the rotary grounding rod greatly shortens the operation time, is easier to control the positioning of metal components, is more convenient to operate, and increases the working efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a low-voltage ground rod in the prior art, wherein the reference numbers: 01-operation part, 02-insulating rod, 03-insulating cylinder, 04-metal component, 041-grounding place, 05-movable clamping piece.
Fig. 2 is a schematic structural diagram of a low-voltage ground rod according to an embodiment of the present invention, wherein the left direction in the figure is the front direction.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
Fig. 2 shows a handle type low-voltage ground rod provided by the invention, which comprises a handle 1, an insulating rod 2, an insulating cylinder 3, a metal component 4, a movable clamping piece 5, a buckle plate 6 and a pressing piece 7; the insulation cylinder 3 is axially provided with a through hole, the insulation rod 2 penetrates through the through hole, and two ends of the insulation rod extend out of the insulation cylinder 3; one side of the metal component 4 is provided with a through hole, and one end of the insulating rod 2 passes through the through hole of the metal component 4 and is connected with the movable clamping piece 5; a grounding part 41 is arranged outside the metal component 4; the handle 1 is fixed on one end of the insulating cylinder 3 far away from the metal component 4, and the handle 1 is also connected with the pressing sheet 7; the pressing sheet 7 is arranged inside the insulating cylinder 3, the pressing sheet 7 is provided with a hole, and the insulating rod 2 penetrates through the hole of the pressing sheet 7; one end of the buckle plate 6 is connected with the handle 1, the buckle plate 6 is provided with a hole, and the insulating rod 2 penetrates through the hole of the buckle plate 6.
Wherein, the handle 1 comprises a movable part 11 and a fixed part 12; the fixing part 12 is fixed on the insulating cylinder 3; the movable part 11 is connected with the fixed part 12, and the movable part 11 is also connected with the pressing sheet 7. When in operation, a worker grasps the handle 1 by one hand and supports the insulating cylinder 3 by the other hand, so that the problem of unstable gravity center of the old grounding rod is solved, and the metal component 4 is easier to position; the worker drives the pressing sheet 7 to move forwards and backwards by holding and loosening the movable part 11, when the pressing sheet 7 moves forwards, the pressing sheet can be in contact with the insulating rod 2 and drives the insulating rod 2 to move forwards, and at the moment, the pinch plate 6 loosens the insulating rod; when the pressing sheet 7 moves backwards, the insulating rod 2 can be loosened to generate no acting force on the pressing sheet, and the buckle plate 6 fastens the insulating rod 2 to prevent the insulating rod 2 from moving backwards; when the insulating rod 2 moves forwards, the movable clamping piece 5 is driven to move forwards, and the movable clamping piece 5 and the metal component 4 fasten a line to be grounded so as to achieve the purpose of grounding; when the overhaul is finished, the insulating rod 2 can move backwards only by pressing the buckle plate 6 to loosen the insulating rod 2. Through above-mentioned working method, insulator spindle 2 moves forward when holding movable part 11 tightly, and insulator spindle 2 is motionless when loosening movable part 11, and the removal of insulator spindle 2 all drives the corresponding removal of activity clamping piece 5 at every turn, so both steerable activity clamping piece 5 compresses tightly the ground connection circuit step by step, and is easy and simple to handle.
The ground 41 includes a ground bolt, a ground nut, and a ground through hole, and the ground bolt passes through the ground through hole to cooperate with the ground nut to connect a ground wire. The ground wire is fixed to the outer side of the metal member by a bolt and a nut.
In addition, the handle 1 is also provided with a first spring 13, and the first spring 13 is a compression spring; one end of the first spring 13 is connected to the fixed portion 12, and the other end is connected to the movable portion 11. When the handle 1 is closed and the hand is loosened, the movable part 11 is opened by itself due to the elastic force of the first spring 13, and the movable part is opened without manual operation, so that the use is convenient.
In addition, the grounding rod of the embodiment further comprises a second spring 8 and a fixed baffle 9 which are installed inside the insulating cylinder 3, wherein the second spring 8 is a compression spring; the insulating rod 2 penetrates through the second spring 8; one end of the second spring 8 is connected with the pressing sheet 7, and the other end of the second spring is connected with the fixed blocking sheet 9; the fixed baffle plate 9 is fixed inside the insulating cylinder 3. When the handle 1 is held tightly, the movable part 11 of the handle 1 drives the pressing sheet 7 to move, a certain included angle is formed between the lower end of the pressing sheet 7 and the vertical direction under the pressure of the movable part 11, and the insulating rod 2 is pressed to move forwards; when the handle 1 is released, the contact portion of the movable portion 11 with the pressing piece 7 moves backward, the pressing force on the pressing piece 7 disappears, and the pressing piece 7 returns to the vertical state due to the elastic force of the second spring 8 and moves backward.
In addition, the ground rod of the present embodiment further includes a third spring 10, and the third spring 10 is a compression spring; one end of the third spring 10 is connected with the pinch plate 6, and the other end is connected with the fixing part 12. When the insulating rod 2 moves forwards, the buckle plate 6 can compress the third spring 10 and loosen the insulating rod 2; when the insulating rod 2 stops moving forwards, the buckle 6 has a tendency of rotating because of the elasticity of the third spring 10 and generates a force for fastening the insulating rod 2, so that the insulating rod 2 cannot move backwards; if the third spring 10 is compressed by pressing the buckle plate 6 all the time, the insulating rod 2 can move backwards, and the use process is convenient.
According to the handle type low-voltage grounding rod provided by the embodiment, the insulating rod 2 is moved through the opening and closing of the handle 1, so that the movable clamping pieces 5 are controlled to gradually compress a grounding circuit, and the closing speed is effectively accelerated; compared with the traditional rotary grounding rod, the operation time is greatly shortened, and the positioning of the metal component 4 is easier to control, so that the operation is more convenient, and the working efficiency is increased.
Example 2
The embodiment is further optimized and defined on the basis of the embodiment as follows:
wherein, the inside direction sand grip that is equipped with of metal component 4, be equipped with on the activity clamping piece 5 with direction sand grip complex groove. The movable clamping piece 5 slides according to the guide convex strip, and the movement track is fixed and is easier to control.
Wherein, the insulating rod 2 adopts glass steel epoxy resin material, withstand voltage and intensity are high.
In addition, the insulating cylinder 3 is externally provided with a handle, so that the insulating cylinder is convenient to carry.
Wherein, the ground nut is locknut, prevents that the earth connection is not hard up.
The same or similar reference numerals correspond to the same or similar parts;
the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A handle type low-voltage grounding rod is characterized by comprising a handle (1), an insulating rod (2), an insulating cylinder (3), a metal component (4), a movable clamping piece (5), a buckling plate (6) and a pressing plate (7); a through hole is axially formed in the insulating cylinder (3), the insulating rod (2) penetrates through the through hole, and two ends of the insulating rod extend out of the insulating cylinder (3); one side of the metal component (4) is provided with a through hole, and one end of the insulating rod (2) passes through the through hole of the metal component (4) and is connected with the movable clamping piece (5); a grounding part (41) is arranged outside the metal component (4); the handle (1) is fixed on one end of the insulating cylinder (3) far away from the metal component (4), and the handle (1) is also connected with the pressing sheet (7); the pressing sheet (7) is arranged inside the insulating cylinder (3), the pressing sheet (7) is provided with a hole, and the insulating rod (2) penetrates through the hole of the pressing sheet (7); one end of the buckle plate (6) is connected with the handle (1), the buckle plate (6) is provided with a hole, and the insulating rod (2) penetrates through the hole of the buckle plate (6).
2. Handle-type low-voltage grounding rod according to claim 1, characterized in that said handle (1) comprises a mobile part (11) and a fixed part (12); the fixing part (12) is fixed on the insulating cylinder (3), and the fixing part (12) is also connected with one end of the buckle plate (6); the movable part (11) is connected with the fixed part (12), and the movable part (11) is also connected with the lower end of the pressing sheet (7).
3. Handle-type low-voltage grounding rod according to claim 1, characterized in that the metal member (4) is provided with a guiding rib inside, and the movable clamping piece (5) is provided with a groove matching with the guiding rib.
4. Handle-type low-voltage grounding rod according to claim 1, characterized in that the ground (41) comprises a grounding bolt, a grounding nut and a grounding through hole, the grounding bolt passing through the grounding through hole and the grounding nut cooperate to connect the ground wire.
5. Handle-type low-voltage grounding rod according to claim 2, characterized in that the handle (1) is further provided with a first spring (13), the first spring (13) is a compression spring; one end of the first spring (13) is connected with the fixed part (12), and the other end of the first spring is connected with the movable part (11).
6. Handle-type low voltage earth rod according to claim 1, characterized in that it further comprises a second spring (8) and a fixed catch (9) mounted inside the insulating cylinder (3), said second spring (8) being a compression spring; the insulating rod (2) penetrates through the second spring (8); one end of the second spring (8) is connected with the pressing sheet (7), and the other end of the second spring is connected with the fixed baffle sheet (9); the fixed blocking piece (9) is fixed inside the insulating cylinder (3).
7. Handle-type low voltage grounding rod according to claim 1 characterized in that it further comprises a third spring (10), said third spring (10) being a compression spring; one end of the third spring (10) is connected with the pinch plate (6), and the other end of the third spring is connected with the fixing part (12).
8. Handle-type low-voltage grounding rod according to claim 1, characterized in that the insulating rod (2) is made of glass fiber reinforced plastic epoxy resin material.
9. Handle-type low-voltage grounding rod according to claim 1, characterized in that the insulating cylinder (3) is externally provided with a handle.
10. A handle low voltage grounding bar according to claim 4 wherein said grounding nut is a locknut.
CN202010398245.XA 2020-05-12 2020-05-12 Handle type low-voltage grounding rod Pending CN111725637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010398245.XA CN111725637A (en) 2020-05-12 2020-05-12 Handle type low-voltage grounding rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010398245.XA CN111725637A (en) 2020-05-12 2020-05-12 Handle type low-voltage grounding rod

Publications (1)

Publication Number Publication Date
CN111725637A true CN111725637A (en) 2020-09-29

Family

ID=72564461

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010398245.XA Pending CN111725637A (en) 2020-05-12 2020-05-12 Handle type low-voltage grounding rod

Country Status (1)

Country Link
CN (1) CN111725637A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202259757U (en) * 2011-09-23 2012-05-30 四川省电力公司乐山电业局 Improved portable grounding wire
CN102801075A (en) * 2012-08-21 2012-11-28 民权县供电局 Ground rod with mechanical locking function
CN205565026U (en) * 2016-04-07 2016-09-07 国网河北省电力公司涉县供电分公司 Machinery pressing mode drainage fastener

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202259757U (en) * 2011-09-23 2012-05-30 四川省电力公司乐山电业局 Improved portable grounding wire
CN102801075A (en) * 2012-08-21 2012-11-28 民权县供电局 Ground rod with mechanical locking function
CN205565026U (en) * 2016-04-07 2016-09-07 国网河北省电力公司涉县供电分公司 Machinery pressing mode drainage fastener

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