CN113437603A - Triangular electricity testing grounding method and device for contact network - Google Patents
Triangular electricity testing grounding method and device for contact network Download PDFInfo
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- CN113437603A CN113437603A CN202110608862.2A CN202110608862A CN113437603A CN 113437603 A CN113437603 A CN 113437603A CN 202110608862 A CN202110608862 A CN 202110608862A CN 113437603 A CN113437603 A CN 113437603A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-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
- H01R4/58—Electrically-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
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a triangular electricity testing grounding method and a triangular electricity testing grounding device for a contact network, which comprises the steps of 100, selecting a grounding point along a track along a line direction on a contact network strut to be grounded, carrying out electricity testing detection on the grounding point of the track, and selectively installing a track grounding wire on the grounding point according to a track detection result; 200, mounting the other end of the track grounding wire on a special contact net hanging device, and limiting the minimum included angle between the track grounding wire and the track grounding wire after adjusting the track grounding wire; 300, selecting an operation point along the reverse line direction of the rail at the contact net support, connecting a rail grounding wire with the contact net support by using a hanging device at the operation point by an operator, and setting an adjusting mechanism on the hanging device to limit an included angle between the rail grounding wire and the rail grounding wire, so that a certain distance can be kept between the rail grounding wire and the rail when the rail grounding wire is hung on the contact net upright post by using the hanging device.
Description
Technical Field
The invention relates to the technical field of rail transit contact networks, in particular to a triangular electricity testing grounding method and device for a contact network.
Background
In the field of rail transit, places such as a locomotive service section servicing yard, a motor train section overhaul warehouse, a vehicle section overhaul warehouse, a passenger service station overhaul warehouse, a subway vehicle section overhaul warehouse and the like are all provided with electrified railway contact networks, and before roof servicing, overhaul, equipment maintenance and other work, operations such as disconnecting switch brake disconnection, electricity testing, residual electricity release, grounding and the like need to be executed.
According to the traditional electricity testing grounding method, after an electricity testing grounding worker of a contact network arrives at the site, a steel rail is ground at a support of the contact network needing to be hung with a grounding wire, the grounding end of the grounding wire is connected, and after no electricity is tested, an insulating boot and an insulating glove are worn well to be hung, but the following problems exist in the operation mode:
(1) the grounding end of the grounding wire is generally arranged near the position where the strut is perpendicular to the steel rail, the grounding point is close to the strut of the contact net, and if the equipment is not completely powered off, large electric arc and voltage are easily generated when the grounding wire is grounded, and certain potential safety hazards exist.
(2) Because the grounding end and the support of the conventional grounding wire are perpendicular to the steel rail in the grounding process, the phenomenon that the grounding wire touches the human body is easy to occur in the process of lifting the grounding wire by an operator.
Disclosure of Invention
The invention aims to provide a triangular electricity testing grounding method and a triangular electricity testing grounding device for a contact network, which are used for solving the problems that the grounding point is too close to the operation distance and the grounding line is easy to get an electric shock in a vertical lifting mode in the prior art.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
a triangular electricity testing grounding method and a triangular electricity testing grounding device for a contact network comprise the following steps:
100, selecting a grounding point along the track direction from a contact net support needing grounding, carrying out electricity testing detection on the track grounding point, and selectively installing a track grounding wire on the grounding point according to a track detection result;
200, mounting the other end of the track grounding wire on a special contact net hanging device, and limiting the minimum included angle between the track grounding wire and the track grounding wire after adjusting the track grounding wire;
and 300, selecting an operation point along the reverse line direction of the track on the contact net support, connecting a track grounding wire with the contact net support by using a hanging device at the operation point by an operator, and forming three endpoints of a triangular electricity testing grounding method by a track grounding point, a contact net support connection point and the operator.
As a preferred aspect of the present invention, in step 100,
the mode of selecting the grounding point on the track is as follows: taking the track as a coordinate axis and taking the currently operated contact net support as an original point, wherein the distance between the grounding point of the contact net support and the contact net support on the track coordinate axis is more than 1000 mm;
the judgment mode of electroscopy detection is as follows: polishing the selected track grounding point, and testing the track by using an electricity testing device to ensure that no current exists on the track;
the pattern mode of the grounding wire and the track is as follows: the rail clamp structure of the grounding wire is arranged at the grinding position of the grounding point of the rail, so that the grounding wire and the rail can be fully electrically conducted.
As a preferred aspect of the present invention, in step 300, the operation points on the track are selected by:
and selecting an operating point at one side of the currently operated contact net support column far away from the grounding point, wherein the distance between the operating point and the contact net support column is more than 1000mm, and the distance between the operating point and the grounding point of the contact net support column is more than 2000 mm.
As a preferable aspect of the present invention, in step 300, the angles of the hanging device during the operation process are: the top end and the tail end of the hanging device are divided into two end points, a main structure of the hanging device is arranged between the two end points, the main structure of the hanging device always keeps certain drooping by taking the end point of the top end as an original point, the included angle range between the main structure of the hanging device and a horizontal line is 60-75 degrees, and the maximum included angles between the track ground wire and the hanging device and the track are not more than 75 degrees;
the track grounding point, the contact net support post wiring point and the operating point form an isosceles triangle.
As a preferred embodiment of the present invention, in step 200, the hanging device limits, by its own structure, an included angle between the track ground line and the hanging device to be the maximum remaining included angle between the track ground line and the track in the isosceles triangle, that is, the included angle between the hanging device and the track ground line is always greater than 30 °.
In order to solve the above technical problems, the present invention further provides the following technical solutions:
a grounding device comprises a track grounding wire connected with a track and a hanging device used for connecting the track grounding wire with a contact net support, wherein the hanging device consists of an operating rod structure, a contact net connecting structure, a grounding wire connecting structure and an included angle limiting structure,
the operating rod structure is used for an operator to hold and control the contact net connecting structure to be connected with a contact net upright post;
the contact net connecting structure is used for connecting a contact net column and the grounding wire connecting structure;
the grounding wire joint structure is connected with a track grounding wire in a rotating manner and is used for electrically conducting the track grounding wire and the contact net joint structure;
the included angle limiting structure is used for adjusting and limiting a minimum included angle between the operating rod structure and the grounding wire joint structure.
As a preferable scheme of the invention, the operating rod structure comprises an insulating rod, a base movable buckling piece movably buckled with the contact net joint structure is installed at the front end of the insulating rod, and a rubber handle for holding and preventing skidding is installed at the tail part of the insulating rod.
As a preferred scheme of the present invention, the contact net connection structure includes a clip base for mounting the base movable fastener and the ground wire connection structure, a contact net clip for connecting an inclined wire on a contact net column is mounted at a top end of the clip base, and the contact net clip cooperates with the clip base to provide gravitational potential energy tending to a vertical state to automatically clamp the inclined wire on the contact net column.
As a preferable aspect of the present invention, the ground wire connection structure includes an insulating radial arm rotatably connected to the clip base, and a ground wire mounting seat mounted on the insulating radial arm for mounting a rail ground wire and electrically connecting the rail ground wire to the insulating radial arm, and a conductive metal strip electrically connecting the insulating radial arm is mounted on the ground wire mounting seat.
As a preferred scheme of the present invention, the included angle limiting structure includes a rod external fixing sliding sleeve sleeved outside the insulating rod, the rod external fixing sliding sleeve is provided with a sliding sleeve fixing buckle for fixing the rod external fixing sliding sleeve at any position on the insulating rod, and is slidably connected with a telescopic supporting arm for movably supporting the insulating rotating arm, and the telescopic supporting arm is provided with a telescopic fixing bolt for fixing the rod external fixing sliding sleeve at any telescopic position on the sliding sleeve fixing buckle.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the adjusting mechanism is arranged on the hanging device and used for limiting the included angle between the adjusting mechanism and the track grounding wire, so that when the hanging device is used for hanging the track grounding wire on the contact net upright post, a certain distance can be kept between the adjusting mechanism and the track grounding wire and the track, and a triangular hanging mode is formed by the grounding point, the contact net upright post hanging point and the operating point, so that the condition that the grounding wire is in contact with a human body is effectively avoided, and the personal safety of grounding electricity testing operators is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a flowchart of the overall method provided in the embodiment of the present invention.
Fig. 2 is a schematic view of the whole apparatus according to the embodiment of the present invention.
The reference numerals in the drawings denote the following, respectively:
1-operating lever structure; 2-contact net connection structure; 3-a ground wire bonding structure; 4-an included angle limiting structure;
11-an insulating rod; 12-base movable fasteners; 13-a rubber grip;
21-a clip base; 22-contact net clip;
31-an insulating radial arm; 32-ground wire mount; 33-a conductive metal strip;
41-sliding sleeves are fixed outside the rods; 42-sliding sleeve fixing buckle; 43-a telescoping support arm; 44-telescopic fixing bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a triangular electricity testing grounding method and device for a contact net, which comprises the following steps:
100, selecting a grounding point along the track direction from a contact net support needing grounding, carrying out electricity testing detection on the track grounding point, and selectively installing a track grounding wire on the grounding point according to a track detection result;
in a step 100, a process is carried out,
the mode of selecting the grounding point on the track is as follows: taking the track as a coordinate axis and taking the currently operated contact net support as an original point, wherein the distance between the grounding point of the contact net support and the contact net support on the track coordinate axis is more than 1000 mm;
the judgment mode of electroscopy detection is as follows: polishing the selected track grounding point, and testing the track by using an electricity testing device to ensure that no current exists on the track;
the pattern mode of the grounding wire and the track is as follows: the rail clamp structure of the grounding wire is arranged at the grinding position of the grounding point of the rail, so that the grounding wire and the rail can be fully electrically conducted.
200, mounting the other end of the track grounding wire on a special contact net hanging device, and limiting the minimum included angle between the track grounding wire and the track grounding wire after adjusting the track grounding wire;
and 300, selecting an operation point along the reverse line direction of the track on the contact net support, connecting a track grounding wire with the contact net support by using a hanging device at the operation point by an operator, and forming three endpoints of a triangular electricity testing grounding method by a track grounding point, a contact net support connection point and the operator.
In step 300, the operation points on the track are selected by:
the method comprises the steps that an operating point is selected on one side, far away from a grounding point, of a currently operated contact net support column, the distance between the operating point and the contact net support column is larger than 1000mm, and the distance between the operating point and the grounding point of the contact net support column is larger than 2000 mm.
The angle of the hanging device in the operation process is as follows: the top end and the tail end of the hanging device are divided into two end points, a main structure of the hanging device is arranged between the two end points, the main structure of the hanging device always keeps certain degree of droop by taking the end point of the top end as an original point, the included angle range of the main structure of the hanging device and a horizontal line is 60-75 degrees, and the maximum included angles of a track grounding line and the hanging device and the track are not more than 75 degrees.
An isosceles triangle is formed by a track grounding point, a contact net support post wiring point and an operating point.
In step 200, the hanging device limits the included angle between the hanging device and the track ground wire through the structure of the hanging device, and the maximum included angle surplus between the isosceles triangle inner track ground wire and the hanging device and the track, namely the included angle between the hanging device and the track ground wire is always larger than 30 degrees.
According to the invention, the adjusting mechanism is arranged on the hanging device and used for limiting the included angle between the adjusting mechanism and the track grounding wire, so that when the hanging device is used for hanging the track grounding wire on the contact net upright post, a certain distance can be kept between the adjusting mechanism and the track grounding wire and the track, and a triangular hanging mode is formed by the grounding point, the contact net upright post hanging point and the operating point, so that the condition that the grounding wire is in contact with a human body is effectively avoided, and the personal safety of grounding electricity testing operators is ensured.
As shown in fig. 2, the present invention also includes a grounding device for the above method, which comprises a track grounding wire engaged with the track, and a hanging device for engaging the contact wire with the track grounding wire to the contact wire support, the hanging device is composed of an operating rod structure 1, a contact wire engaging structure 2, a grounding wire engaging structure 3 and an included angle limiting structure 4, wherein,
the operating rod structure 1 is used for an operator to hold and control the contact net connecting structure 2 to be connected with a contact net upright post;
the contact net connecting structure 2 is used for connecting a contact net column and a grounding wire connecting structure 3;
the grounding wire joint structure 3 is connected with a track grounding wire and rotatably connected with the contact net joint structure 2, and the grounding wire joint structure 3 is used for electrically conducting the track grounding wire and the contact net joint structure 2;
the angle limiting structure 4 is used to adjust and limit the minimum angle between the operating rod structure 1 and the ground wire bonding structure 3.
The operating rod structure 1 comprises an insulating rod 11, a base movable buckling piece 12 movably clamped with the contact net connecting structure 2 is installed at the front end of the insulating rod 11, and a rubber handle 13 used for holding and preventing skidding is installed at the tail of the insulating rod 11.
The contact net connecting structure 2 comprises a clamping buckle base 21 used for installing the base movable buckling piece 12 and the grounding wire connecting structure 3, a contact net clamping buckle 22 used for connecting an inclined wire on a contact net column is installed at the top end of the clamping buckle base 21, and the contact net clamping buckle 22 is matched with the clamping buckle base 21 to provide gravitational potential energy tending to a vertical state to automatically clamp the inclined wire on the contact net column.
The ground wire connection structure 3 includes an insulating radial arm 31 rotatably connected to the clip base 21, and a ground wire mounting seat 32 mounted on the insulating radial arm 31 for mounting a rail ground wire and electrically connecting the rail ground wire, and a conductive metal strip 33 mounted on the ground wire mounting seat 32 and electrically connecting the insulating radial arm 31.
The included angle limiting structure 4 comprises a rod external fixing sliding sleeve 41 sleeved outside the insulating rod 11, a sliding sleeve fixing buckle 42 used for fixing any position of the rod external fixing sliding sleeve 41 on the insulating rod 11, and a telescopic supporting arm 43 used for movably supporting the insulating rotary arm 31, wherein a telescopic fixing bolt 44 used for fixing any telescopic position of the rod external fixing sliding sleeve 42 on the sliding sleeve fixing buckle is installed on the telescopic supporting arm 43.
When the hanging device is used, one end of the track grounding wire installed on the track in the above steps for hanging the contact system needs to be installed on the grounding wire installation seat 32 of the grounding wire connection structure 3, so that the track grounding wire is electrically conducted with the clip base 21 and the contact system clip (22) of the contact system connection structure 2 through the grounding wire installation seat 32 and the conductive metal strip 33, and as the insulating rotary arm 31 is rotatably connected with the clip base 21, the conduction of the conductive metal strip 33 and the clip base 21 is not influenced when the insulating rotary arm 31 rotates along the clip base 21.
Then the insulation rod 11 is movably clamped on the clamping base 21 through the base movable buckling piece 12 at the front end of the insulation rod, since the operating lever structure 1 and the ground wire bonding structure 3 form two sides of a triangle on the catenary bonding structure 2, the grounding wire bonding structure 3 provides a unidirectional pulling force to the contact net bonding structure 2 during the hanging process, therefore, the base movable buckling piece 12 arranged at the front end of the insulating rod 11 is matched and clamped with the clamping buckle base 21 by utilizing the unidirectional pulling force generated by the grounding wire connecting structure 3 on the contact net connecting structure 2 until after the contact net connecting structure 2 is hung on a contact net upright post through the contact net clamping buckle 22, at this time, the operator can control the base movable fastener 12 to be separated from the clip base 21 by holding the rubber handle 13 and adjusting the engaging direction of the base movable fastener 12 at the front end of the insulating rod 11 with the clip base 21.
After the operating rod structure 1 is movably clamped with the contact net connecting structure 2, the included angle limiting structure 4 on the insulating rod 11 of the operating rod structure 1 needs to be adjusted, for limiting the minimum rotation area of the insulating radial arm 31 of the ground wire connecting structure 3, specifically, by sliding the external rod fixing sliding sleeve 41 to a proper position along the outside of the insulating rod 11, then screwing the sliding sleeve fixing buckle 42 for fixing the position thereof, and then controlling the telescopic supporting arm 43 to telescope along the external rod fixing sliding sleeve 41 toward the position of the insulating radial arm 31, and the telescopic fixing bolt 44 is tightened for fixing its position after being contracted to a proper position, so that the insulation radial arm 31 is stopped by the front end of the telescopic support arm 43 when being rotated to an included angle of approximately 30 deg. toward the insulation rod 11, the earth wire mounted on the earth wire joint structure 3 will thus remain at a certain safe distance from the operating lever structure 1 during subsequent hitching.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. A triangular electricity testing grounding method for a contact net is characterized by comprising the following steps:
100, selecting a grounding point along the track direction from a contact net support needing grounding, carrying out electricity testing detection on the track grounding point, and selectively installing a track grounding wire on the grounding point according to a track detection result;
200, mounting the other end of the track grounding wire on a special contact net hanging device, and limiting the minimum included angle between the track grounding wire and the track grounding wire after adjusting the track grounding wire;
and 300, selecting an operation point along the reverse line direction of the track on the contact net support, connecting a track grounding wire with the contact net support by using a hanging device at the operation point by an operator, and forming three endpoints of a triangular electricity testing grounding method by a track grounding point, a contact net support connection point and the operator.
2. The triangular electroscopic grounding method for the overhead line system according to claim 1, wherein in step 100,
the mode of selecting the grounding point on the track is as follows: taking the track as a coordinate axis and taking the currently operated contact net support as an original point, wherein the distance between the grounding point of the contact net support and the contact net support on the track coordinate axis is more than 1000 mm;
the judgment mode of electroscopy detection is as follows: polishing the selected track grounding point, and testing the track by using an electricity testing device to ensure that no current exists on the track;
the pattern mode of the grounding wire and the track is as follows: the rail clamp structure of the grounding wire is arranged at the grinding position of the grounding point of the rail, so that the grounding wire and the rail can be fully electrically conducted.
3. The triangular electricity testing and grounding method for the overhead line system according to claim 2, wherein in the step 300, the operation points on the track are selected in a manner that:
and selecting an operating point at one side of the currently operated contact net support column far away from the grounding point, wherein the distance between the operating point and the contact net support column is more than 1000mm, and the distance between the operating point and the grounding point of the contact net support column is more than 2000 mm.
4. The triangular electroscopic grounding method for the overhead line system according to claim 3, wherein in step 300,
the angle of the hanging device in the operation process is as follows: the top end and the tail end of the hanging device are divided into two end points, a main structure of the hanging device is arranged between the two end points, the main structure of the hanging device always keeps certain drooping by taking the end point of the top end as an original point, the included angle range between the main structure of the hanging device and a horizontal line is 60-75 degrees, and the maximum included angles between the track ground wire and the hanging device and the track are not more than 75 degrees;
the track grounding point, the contact net support post wiring point and the operating point form an isosceles triangle.
5. The triangular electroscopic grounding method for the overhead line system according to claim 4, which is characterized in that: in step 200, the hanging device is limited by its own structure to have an included angle with the track ground wire, and the track ground wire and the largest included angle surplus between the hanging device and the track in the isosceles triangle, that is, the included angle between the hanging device and the track ground wire is always greater than 30 °.
6. A grounding device applied to the triangular electroscopic grounding method of the contact net of any one of the claims 1 to 5, which comprises a track grounding wire connected with a track and a hanging device used for connecting the track grounding wire with a contact net support, and is characterized in that: the hanging device consists of an operating rod structure (1), a contact net joint structure (2), a grounding wire joint structure (3) and an included angle limiting structure (4),
the operating rod structure (1) is used for an operator to hold and control the contact net connecting structure (2) to be connected with a contact net upright post;
the contact net connecting structure (2) is used for connecting a contact net column and the grounding wire connecting structure (3);
the grounding wire joint structure (3) is connected with a track grounding wire in a rotating manner and the contact net joint structure (2), and the grounding wire joint structure (3) is used for electrically conducting the track grounding wire and the contact net joint structure (2);
the included angle limiting structure (4) is used for adjusting and limiting the minimum included angle between the operating rod structure (1) and the grounding wire joint structure (3).
7. An earthing device according to claim 6, characterized in that: the operating rod structure (1) comprises an insulating rod (11), a base movable buckling piece (12) movably clamped with the contact net connecting structure (2) is installed at the front end of the insulating rod (11), and a rubber handle (13) used for holding and preventing skidding is installed at the tail of the insulating rod (11).
8. An earthing device according to claim 7, characterized in that: the contact net connection structure (2) comprises a clamping buckle base (21) used for installing the base movable buckling piece (12) and the grounding wire connection structure (3), a contact net clamping buckle (22) used for connecting an inclined wire on a contact net stand column is installed at the top end of the clamping buckle base (21), and the contact net clamping buckle (22) is matched with the clamping buckle base (21) to provide gravitational potential energy tending to a vertical state to automatically clamp the inclined wire on the contact net stand column.
9. An earthing device according to claim 8, characterized in that: the ground wire joint structure (3) comprises an insulation rotary arm (31) rotatably connected with the clamping base (21), and a ground wire mounting seat (32) arranged on the insulation rotary arm (31) and used for mounting a track ground wire and electrically conducting with the track ground wire, and a conductive metal strip (33) electrically conducting with the insulation rotary arm (31) is arranged on the ground wire mounting seat (32).
10. A grounding device as in claim 9, wherein: contained angle limit structure (4) establish including the cover the pole external fixation sliding sleeve (41) in insulator spindle (11) outside, install on pole external fixation sliding sleeve (41) and be used for fixing it and be in insulator spindle (11) are gone up the fixed knot of sliding sleeve (42) of optional position to and sliding connection has and is used for the activity to support telescopic support arm (43) of insulating spiral arm (31), install on telescopic support arm (43) and be used for fixing it and be in sliding sleeve is fixed detains flexible fixing bolt (44) of optional flexible position on (42).
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| CN203491397U (en) * | 2013-10-15 | 2014-03-19 | 国家电网公司 | Split type alarm grounding device |
| CN204905469U (en) * | 2015-07-07 | 2015-12-23 | 国家电网公司 | Distribution lines overhauls protective earthing device |
| CN109449629A (en) * | 2018-12-20 | 2019-03-08 | 北京铁道工程机电技术研究所股份有限公司 | A kind of contact net earthing or grounding means, contact net ground connection control system and control method |
| CN209029555U (en) * | 2018-12-20 | 2019-06-25 | 北京铁道工程机电技术研究所股份有限公司 | A kind of contact net earthing or grounding means and contact net are grounded control system |
| CN209822903U (en) * | 2019-06-05 | 2019-12-20 | 孙玉璋 | Grounding device of high-voltage power transmission and transformation equipment |
| CN112421267A (en) * | 2020-10-26 | 2021-02-26 | 广东电网有限责任公司 | Variable-angle grounding wire clamp for power transmission line |
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