A portable temporary grounding hanging loop below 35 kV and its usage method

Abstract

The present invention provides a portable temporary earthing hanging loop for voltages below 35 kV, which includes an inverted L-shaped clamping plate and an insulating column arranged at the lower end of the L-shaped clamping plate. A double-tongue wire clamp is arranged below the L-shaped clamping plate. A chute is arranged vertically along the inner side of the L-shaped clamping plate. The right side of the double-tongue wire clamp is slidably arranged on the chute vertically. Connecting columns are arranged on both sides of the middle of the upper end of the double-tongue wire clamp. A direction-adjusting tensioning wheel is arranged on the side wall of the L-shaped clamping plate on the right side of the connecting column. A supporting wheel is arranged at the upper end of the corner of the L-shaped clamping plate. A wire winder is arranged at the lower end of the insulating column. One end of an insulating rope is fixedly connected to the connecting column, and the other end of the insulating rope passes through the direction-adjusting tensioning wheel and the supporting wheel in sequence and is wound on the wire winder. The present invention realizes two wire hanging methods, has universality, is simple to operate, can be applied to different power mechanisms to be hung with wires, and avoids the "false hanging" state.

Description

Technical Field

[0001] The present invention relates to the technical field of earthing suspension loops, in particular to a portable temporary earthing suspension loop for voltages below 35 kV and its usage method. Background Art

[0002] A temporary earthing wire is a safety short-circuit device that needs to be connected before equipment or lines are powered off and before maintenance in the power industry. It is a safety protection tool used to prevent sudden power-on and avoid harm to maintenance personnel or equipment. It is usually used in conjunction with an earthing loop. The earthing loop is configured on the distribution line. When the line needs to be grounded, the temporary earthing wire is connected to the earthing loop. However, most lines do not have enough earthing loops, or the equipment to be maintained does not meet the requirements for safety distances. For example, for the lower terminals of disconnecting switches and drop fuses, the main line power of the upper level needs to be cut off, expanding the scope of power outage.

[0003] The power connection clips of existing temporary earthing wires are of a single type of clamp, such as a single screw compression type, a single tongue compression type, etc. The screw compression type is suitable for indoor equipment, such as maintenance in substations, etc. For outdoor distribution lines (overhead), insulated wires are mostly used, and the tongue compression type is more convenient to use. During a single maintenance operation, maintenance personnel often need to use temporary earthing wires with different connection methods according to the situation, so they need to carry more tools. Moreover, when using the existing screw compression type for connection, for equipment with a certain height, high-altitude operations are required. Summary of the Invention

[0004] The present invention provides a portable temporary earthing suspension loop for voltages below 35 kV and its usage method, which realizes two wire hanging methods, has versatility, is simple to operate, can be applied to different power mechanisms to be wired, and avoids the "false hanging" state.

[0005] The technical solution of the present invention is realized as follows: A portable temporary earthing suspension loop for voltages below 35 kV includes an inverted L-shaped clamping plate and an insulating column arranged at the lower end of the L-shaped clamping plate. A double-tongue wire clamp is arranged below the L-shaped clamping plate. A chute is arranged vertically along the inner side of the L-shaped clamping plate. The right side of the double-tongue wire clamp is slidably arranged vertically on the chute. Connecting columns are arranged on both sides of the middle of the upper end of the double-tongue wire clamp. A steering tensioning wheel is arranged on the side wall of the L-shaped clamping plate on the right side of the connecting column. A supporting wheel is arranged at the upper end of the corner of the L-shaped clamping plate. A wire winder is arranged at the lower end of the insulating column. One end of an insulating rope is fixedly connected to the connecting column, and the other end of the insulating rope passes through the steering tensioning wheel and the supporting wheel in sequence and is wound on the wire winder.

[0006] Further, the wire winder includes two wire blocking discs arranged at the lower end of the insulating column. A rotating cylinder is arranged between the two wire blocking discs. One end of the rotating cylinder extends out of the wire blocking disc and is provided with a check mechanism and a driving mechanism. The check mechanism includes a ratchet wheel fixed on the rotating cylinder. A positioning rod is arranged on the wire blocking disc on one side of the ratchet wheel. One end of the positioning rod is provided with a check ratchet pawl cooperating with the ratchet wheel, and the other end slides through the wire blocking disc and is provided with a limiting block. An elastic member is sleeved on the positioning rod between the limiting block and the wire blocking disc. A limiting rod is arranged on the wire blocking disc on one side of the check ratchet pawl, and a return spring is arranged between the limiting rod and the check ratchet pawl.

[0007] Further, a tension sensor for detecting the tension of the insulating rope and a warning mechanism connected to the tension sensor are arranged on the insulating column above the rotating cylinder.

[0008] Further, the driving mechanism is a rotating handle connected to the rotating cylinder.

[0009] Further, the driving mechanism is a rotating motor, and an electric push rod for driving the positioning rod to slide along the axis of the wire blocking disc is arranged on the wire blocking disc.

[0010] Further, a portable temporary earthing hanging ring below 35 kV further includes a controller and a wireless transceiver arranged at the lower end of the insulating column. The driving mechanism, the tension sensor, the warning mechanism and the wireless transceiver are all connected to the controller, and the wireless transceiver is connected to a remote controller.

[0011] Further, a hanging ring body is fixedly arranged vertically along the lower end of the outer side of the L-shaped clamping plate.

[0012] A using method of a portable temporary earthing hanging ring below 35 kV. The power mechanism to be hung is placed between the L-shaped clamping plate (1) and the double-tongue wire clamp (4) or placed inside the double-tongue wire clamp (4). If the power mechanism to be hung is placed between the L-shaped clamping plate and the double-tongue wire clamp, the following steps are included:

[0013] (1) Rotate the rotating cylinder through the driving mechanism to wind the insulating rope. The insulating rope drives the double-tongue wire clamp to move upward along the sliding groove and cooperate with the L-shaped clamping plate to clamp the power mechanism to be hung.

[0014] (2) The tension sensor detects the tension on the insulating rope. If the insulating rope reaches the set tension, it indicates that the L-shaped clamping plate and the double-tongue wire clamp have clamped the power mechanism to be hung. The warning mechanism gives a reminder, then the driving mechanism stops rotating, and the check ratchet pawl restricts the reverse rotation of the ratchet wheel, thereby avoiding the reverse rotation of the rotating cylinder and the unwinding of the insulating rope. Finally, the earthing wire is hung on the hanging ring body.

[0015] (3) When it is necessary to loosen the power mechanism to be hung, pull the positioning rod outwards to separate the check ratchet pawl from the ratchet wheel. The driving mechanism rotates in the reverse direction to release the insulating rope, and the double-tongue wire clamp moves downward along the sliding groove under the action of gravity to loosen the power mechanism to be hung.

[0016] Further, in step (1), for the power mechanism to be hung that is inconvenient for manual access, it can be connected to the lower end of the insulating rod and insulating column, place the power mechanism to be hung between the L-shaped clamping plate and the double-tongue wire clamp, the driving mechanism uses a rotary motor, and the driving mechanism is started through a remote controller; in step (2), when the tension sensor detects that the tension on the insulating rope reaches the set value, the controller controls the driving mechanism to stop rotating; in step (3), the electric push rod is started through the remote controller, the positioning rod is driven by the electric push rod to move outwards, so that the check ratchet is separated from the ratchet, and then the driving mechanism is started through the remote controller to rotate in the reverse direction.

[0017] Further, if the power mechanism to be hung is placed in the double-tongue wire clamp (4), it includes the following steps: connect it to the lower end of the insulating rod and insulating column, place the double-tongue wire clamp above the overhead wire, separate the insulating rod from the insulating column, and the double-tongue wire clamp hangs on the overhead wire under the action of gravity.

[0018] The beneficial effects of the present invention:

[0019] The temporary grounding hanging ring of the present invention realizes two hanging methods through the cooperation of the L-shaped wire board and the double-tongue wire clamp, has universality, and can be applied to different power mechanisms to be hung, such as overhead lines, disconnecting switches, etc.; the check mechanism prevents the insulating rope from automatically unwinding, ensuring the stability of the L-shaped wire board and the double-tongue wire clamp for clamping the power mechanism. If it is necessary to unwind the insulating rope, only stretch the positioning rod outwards to separate the check ratchet from the ratchet, and the operation is simple and convenient; through the cooperation of the tension sensor and the warning mechanism, it is convenient to monitor the tension of the insulating rope, ensure that the L-shaped wire board and the double-tongue wire clamp truly clamp the power mechanism, and avoid false hanging; through the cooperation of the remote controller and the wireless transceiver, for power mechanisms at high altitudes or other inconvenient-to-approach places, remote operation can be carried out, improving the operation efficiency and safety. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the wire winding device in Embodiment 1;

[0023] Figure 3 It is a schematic structural diagram of the check mechanism in Embodiment 1;

[0024] Figure 4 It is a schematic structural diagram of the wire winding device in Embodiment 2;

[0025] Figure 5 It is a schematic structural diagram of the wire winder in the third embodiment;

[0026] Figure 6 It is a schematic structural diagram of the check mechanism in the third embodiment.

[0027] L-shaped clamping plate 1, insulating column 2, hanging ring body 3, double-tongue wire clamp 4, sliding groove 5, connecting column 6, direction-adjusting tension pulley 7, supporting wheel 8, insulating rope 9, wire blocking disc 10, rotating cylinder 11, ratchet wheel 12, positioning rod 13, check ratchet pawl 14, limiting block 15, elastic member 16, limiting rod 17, return spring 18, rotating handle 19, tension sensor 20, warning mechanism 21, rotating motor 22, electric push rod 23, controller 24, wireless transceiver 25. Specific implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] As Figures 1-3 shown, a portable temporary grounding hanging ring below 35 kV includes an inverted L-shaped clamping plate 1 and an insulating column 2 fixed to the lower end of the L-shaped clamping plate 1. The lower end of the outer side of the L-shaped clamping plate 1 is vertically fixed with a hanging ring body 3 that is electrically conductive with the L-shaped clamping plate 1. An insulating sleeve is sleeved on the outer side of the hanging ring body 3, and only the lower end has an exposed conductive section. Even if the grounding wire has an upward rebounding action, it can be blocked by the hanging ring body 3. A double-tongue wire clamp 4 is arranged below the L-shaped clamping plate 1. A sliding groove 5 is vertically arranged on the inner side of the L-shaped clamping plate 1. The right side of the double-tongue wire clamp 4 is vertically slidably placed on the sliding groove 5. Connecting columns 6 are fixed on both sides of the middle of the upper end of the double-tongue wire clamp 4. A direction-adjusting tension pulley 7 is arranged on the side wall of the L-shaped clamping plate 1 on the right side of the connecting column 6. A supporting wheel 8 is installed at the upper end of the corner of the L-shaped clamping plate 1. A wire winder is arranged at the lower end of the insulating column 2.

[0031] As Figure 2 and 3As shown in the figure, the winding device includes two wire retaining discs 10 fixed to the lower end of the insulating column 2. A rotating cylinder 11 is rotatably connected between the two wire retaining discs 10 through a bearing. One end of the rotating cylinder 11 extending out of the wire retaining disc 10 is provided with a check mechanism and a driving mechanism. The check mechanism includes a ratchet wheel 12 fixed to the rotating cylinder 11. A positioning rod 13 is provided on the wire retaining disc 10 on one side of the ratchet wheel 12. One end of the positioning rod 13 is provided with a check ratchet pawl 14 that cooperates with the ratchet wheel 12, and the other end slides through the wire retaining disc 10 and is threadedly connected with a limit block 15. An elastic member 16 is sleeved on the positioning rod 13 between the limit block 15 and the wire retaining disc 10. A limit rod 17 is fixed to the wire retaining disc 10 on one side of the check ratchet pawl 14, and the limit rod 17 is connected to the check ratchet pawl 14 through a return spring 18. The connecting column 6 is fixedly connected to one end of the insulating rope 9. The other end of the insulating rope 9 passes through the steering tensioning wheel 7 and the supporting wheel 8 in sequence and is wound around the rotating cylinder 11.

[0032] The driving mechanism is a rotating handle 19 connected to the end of the rotating cylinder 11. By shaking the rotating handle 19, the rotating cylinder 11 is driven to rotate, so as to drive the insulating rope 9 to be wound on the rotating cylinder 11, and drive the double-tongue wire clamp 4 to move upward along the sliding groove 5 to clamp the power mechanism to be hung with the L-shaped clamping plate 1.

[0033] Embodiment 2

[0034] This embodiment is basically the same as Embodiment 1, except that: as Figure 4 shown, a tension sensor 20 for detecting the tension of the insulating rope 9 and a warning mechanism 21 connected to the tension sensor 20 are fixed on the insulating column 2 above the rotating cylinder 11. The warning mechanism 21 is a buzzer or an indicator light.

[0035] When the tension sensor 20 detects that the tension on the insulating rope 9 reaches the set value, it indicates that the double-tongue wire clamp 4 has clamped the power mechanism to be hung with the L-shaped clamping plate 1, and the insulating rope 9 cannot be wound any more. Then the operator stops shaking the rotating handle 19 to avoid the situation that the power mechanism to be hung is not clamped and the temporary earthing loop does not work, resulting in a "false hanging" state.

[0036] Embodiment 3

[0037] This embodiment is basically the same as Embodiments 1 and 2, except that: as Figure 5 and 6 shown, the driving mechanism is a rotating motor 22. An electric push rod 23 perpendicular to the axial direction of the wire retaining disc 10 is installed on the wire retaining disc 10. The electric push rod 23 is connected to one end of the positioning rod 13 close to the check ratchet pawl 14 to drive the positioning rod 13 to slide along the wire retaining disc 10.

[0038] A portable temporary earthing hanging loop below 35 kV further includes a controller 24 and a wireless transceiver 25 fixed to the lower end of the insulating column 2. The controller 24 is a microprocessor, and the driving mechanism, the tension sensor 20, the warning mechanism 21 and the wireless transceiver 25 are all electrically connected to the controller 24. The above structures are all connected to the storage battery, and the storage battery is installed at the lower end of the insulating column 2. The wireless transceiver 25 is connected to the remote controller.

[0039] For the power mechanism to be hung that requires high-altitude operation or other power mechanisms to be hung that are inconvenient for manual access, the controller 24 is connected to the remote controller through the wireless transceiver 25 to realize the double-tongue clamp 4 and the L-shaped clamping plate 1 to clamp the power mechanism to be hung, without the need for workers to climb to high altitudes, improving the operation efficiency and safety.

[0040] Embodiment 4

[0041] Adopt the usage method of the portable temporary earthing hanging loop below 35 kV described in Embodiments 1 to 3. The power mechanism to be hung is placed between the L-shaped clamping plate (1) and the double-tongue clamp (4) or inside the double-tongue clamp (4). If the power mechanism to be hung is placed between the L-shaped clamping plate (1) and the double-tongue clamp (4), the following steps are included:

[0042] (1) If the power mechanism to be hung is placed between the L-shaped clamping plate 1 and the double-tongue clamp 4, the power mechanism to be hung can be a motor mechanism applicable to a screw compression clamp, such as a disconnecting switch, a fuse cutout, etc. Then, the driving mechanism rotates the rotating cylinder 11 to wind the insulating rope 9, and the insulating rope 9 drives the double-tongue clamp 4 to move upward along the chute 5 to cooperate with the L-shaped clamping plate 1 to clamp the power mechanism to be hung;

[0043] (2) The tension sensor 20 detects the tension on the insulating rope 9. If the insulating rope 9 reaches the set tension, it indicates that the L-shaped clamping plate 1 and the double-tongue clamp 4 have clamped the power mechanism to be hung, and the warning mechanism 21 gives a reminder. Then, the driving mechanism stops rotating, and the check pawl 14 restricts the reverse rotation of the ratchet 12, thereby avoiding the reverse rotation of the rotating cylinder 11 and the unwinding of the insulating rope 9. Finally, the grounding wire is hung on the hanging loop body 3.

[0044] (3) When it is necessary to loosen the power mechanism to be hung, pull out the positioning rod 13 outward to separate the check pawl 14 from the ratchet 12, and the driving mechanism rotates in the reverse direction to release the insulating rope 9. The double-tongue clamp 4 moves downward along the chute 5 under the action of gravity to loosen the power mechanism to be hung.

[0045] In step (1), for the power mechanism to be hung at high altitude or other places where it is inconvenient for humans, it can be connected to the lower end of the insulating column 2 through an insulating rod. The power mechanism to be hung is placed between the L-shaped clamping plate 1 and the double-tongue wire clamp 4. The driving mechanism uses a rotary motor 22, and the driving mechanism is started through a remote control. In step (2), when the tension sensor 20 detects that the tension on the insulating rope 9 reaches the set value, the controller 24 controls the driving mechanism to stop rotating. In step (3), the electric push rod 23 is started through the remote control, and the positioning rod 13 is driven to move outwards by the electric push rod 23, so that the check ratchet 14 is separated from the ratchet wheel 12, and then the driving mechanism is started to rotate in the reverse direction through the remote control.

[0046] If the power mechanism to be hung is placed in the double-tongue wire clamp (4), when the power mechanism to be hung is an overhead wire, it is connected to the lower end of the insulating column 2 through an insulating rod. The double-tongue wire clamp 4 is placed above the overhead wire, and the insulating rod is separated from the insulating column 2. The double-tongue wire clamp 4 is hung on the overhead wire under the action of gravity.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable temporary earthing hanging loop below 35 kV, characterized in that: It includes an inverted L-shaped clamping plate (1) and an insulating column (2) arranged at the lower end of the L-shaped clamping plate (1). A double-tongue wire clamp (4) is arranged below the L-shaped clamping plate (1). A chute (5) is arranged vertically along the inner side of the L-shaped clamping plate (1). The right side of the double-tongue wire clamp (4) is slidably arranged on the chute (5) vertically. Connecting columns (6) are arranged on both sides of the middle of the upper end of the double-tongue wire clamp (4). A direction-adjusting tension wheel (7) is arranged on the side wall of the L-shaped clamping plate (1) on the right side of the connecting column (6). A support wheel (8) is arranged at the upper end of the corner of the L-shaped clamping plate (1). A wire winder is arranged at the lower end of the insulating column (2). One end of the connecting column (6) is fixedly connected to one end of an insulating rope (9). The other end of the insulating rope (9) passes through the direction-adjusting tension wheel (7) and the support wheel (8) in sequence and is wound on the wire winder; The wire winder includes two wire blocking discs (10) arranged at the lower end of the insulating column (2). A rotating cylinder (11) is arranged between the two wire blocking discs (10). A one-way mechanism and a driving mechanism are arranged at one end of the rotating cylinder (11) extending out of the wire blocking disc (10). The one-way mechanism includes a ratchet wheel (12) fixed on the rotating cylinder (11). A positioning rod (13) is arranged on the wire blocking disc (10) on one side of the ratchet wheel (12). A one-way pawl (14) cooperating with the ratchet wheel (12) is arranged at one end of the positioning rod (13). A limiting block (15) is arranged at the other end sliding through the wire blocking disc (10). An elastic member (16) is sleeved on the positioning rod (13) between the limiting block (15) and the wire blocking disc (10). A limiting rod (17) is arranged on the wire blocking disc (10) on one side of the one-way pawl (14). A return spring (18) is arranged between the limiting rod (17) and the one-way pawl (14); A tension sensor (20) for detecting the tension of the insulating rope (9) and a warning mechanism (21) connected to the tension sensor (20) are arranged on the insulating column (2) above the rotating cylinder (11); The using method of a portable temporary earthing hanging ring below 35 kV is as follows. The power mechanism to be hung is placed between the L-shaped clamping plate (1) and the double-tongue wire clamp (4) or placed inside the double-tongue wire clamp (4). If the power mechanism to be hung is placed between the L-shaped clamping plate (1) and the double-tongue wire clamp (4), it includes the following steps: (1) Rotate the rotating cylinder (11) through the driving mechanism to wind the insulating rope (9). The insulating rope (9) drives the double-tongue wire clamp (4) to move upward along the chute (5) and cooperate with the L-shaped clamping plate (1) to clamp the power mechanism to be hung; (2) The tension sensor (20) detects the tension on the insulating rope (9). If the insulating rope (9) reaches the set tension, it indicates that the L-shaped clamping plate (1) and the double-tongue wire clamp (4) have clamped the power mechanism to be hung. The warning mechanism (21) gives a reminder, then the driving mechanism stops rotating, and the one-way pawl (14) restricts the reverse rotation of the ratchet wheel (12), thus avoiding the reverse rotation of the rotating cylinder (11) and the unwinding of the insulating rope (9); Finally, hang the earthing wire on the hanging ring body (3); (3)When it is necessary to release the power mechanism to be hung, pull the positioning rod (13) outwards to separate the check pawl (14) from the ratchet wheel (12), and the driving mechanism rotates in the reverse direction to unwind the insulating rope (9). Under the action of gravity, the double-tongue wire clamp (4) moves down along the chute (5) to release the power mechanism to be hung.

2. A portable temporary earthing hanging loop below 35 kV according to claim 1, characterized in that: The driving mechanism is a rotary handle (19) connected to the drum (11).

3. A portable temporary earthing hanging ring below 35 kV according to claim 1, characterized in that: The driving mechanism is a rotary motor (22), and an electric push rod (23) for driving the positioning rod (13) to slide along the axis of the wire retaining disc (10) is arranged on the wire retaining disc (10).

4. A portable temporary earthing hanging ring below 35 kV according to claim 3, characterized in that: It further includes a controller (24) and a wireless transceiver (25) arranged at the lower end of the insulating column (2). The driving mechanism, the tension sensor (20), the warning mechanism (21) and the wireless transceiver (25) are all connected to the controller (24), and the wireless transceiver (25) is connected to a remote controller.

5. A portable temporary grounding hanging ring below 35 kV according to claim 1, characterized in that: A hanging ring body (3) is vertically fixed along the lower end of the outer side of the L-shaped clamping plate (1).

6. A portable temporary grounding hanging loop below 35 kV as claimed in claim 4, characterized in that, In step (1), for the power mechanism to be hung that is inconvenient for manpower to approach, it can be connected to the lower end of the insulating column (2) through an insulating rod, place the power mechanism to be hung between the L-shaped clamping plate (1) and the double-tongue wire clamp (4), the driving mechanism adopts a rotary motor (22), and start the driving mechanism through a remote controller; in step (2), when the tension sensor (20) detects that the tension on the insulating rope (9) reaches the set value, the controller (24) controls the driving mechanism to stop rotating; in step (3), start the electric push rod (23) through a remote controller, drive the positioning rod (13) to move outwards through the electric push rod (23) to separate the check pawl (14) from the ratchet wheel (12), and then start the driving mechanism to rotate in the reverse direction through a remote controller.

7. A portable temporary earthing hanging loop below 35 kV as claimed in claim 1, characterized in that, If the power mechanism to be hung is placed in the double-tongue wire clamp (4), it includes the following steps: connect it to the lower end of the insulating column (2) through an insulating rod, place the double-tongue wire clamp (4) above the overhead wire, separate the insulating rod from the insulating column (2), and the double-tongue wire clamp (4) hangs on the overhead wire under the action of gravity.

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