Ultra-high voltage anti-overturning spiral plain end grounding clamp

Abstract

The invention provides an ultra-high voltage anti-overturning spiral plain end grounding clamp, and relates to the technical field of power transmission line maintenance equipment, and the grounding clamp comprises an outer frame, one side of which is provided with an opening; the movable clamping block is arranged in the outer frame, and one end of the movable clamping block is connected with the side, opposite to the opening, of the outer frame in a sliding mode; the adjusting screw rod penetrates through the upper part of the outer frame and is in threaded connection with the outer frame, and the lower end of the adjusting screw rod is rotatably connected with the movable clamping block; the upper end of the telescopic rod is connected with the outer frame; and the balancing weight is connected to the lower end of the telescopic rod. The grounding wire clamp has the beneficial effects that the interference of external force is resisted by using the torque generated by the gravity of the balancing weight, so that the wire clamp does not turn over when being influenced by the external force such as natural wind power and the gravity of the grounding wire in the working process of clamping the grounding wire, and can be always kept in a vertical state; the safety and reliability of the automatic grounding work of the ultra-high voltage transmission line are improved, and the risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission line maintenance equipment, and in particular to an ultra-high voltage anti-flip spiral flat grounding clamp. Background Art

[0002] When the UHV transmission line is shut down for maintenance or other work, it is necessary to use a grounding clamp to ground the UHV transmission line to prevent the equipment from suddenly receiving power and the induced voltage generated by the adjacent high-voltage live equipment from harming the human body, and at the same time discharge the residual charge of the power-off equipment. The traditional grounding clamp is a spiral compression type wire clamp, which has exposed serious technical defects in actual application. The most prominent problem is that the wire clamp is easily affected by external environmental factors and changes its position when it is working. Especially in the harsh outdoor working environment, under the combined influence of various external forces such as the continuous action of natural wind, the vibration caused by weather changes, and the tension generated by the deadweight of the grounding copper wire, the spiral compression type wire clamp installed on the conductor often rotates and flips to varying degrees. This flipping phenomenon not only affects the normal operation of the wire clamp, but more seriously, it makes subsequent maintenance work difficult. With the modernization and intelligence of power system maintenance methods, more and more operations have begun to use automated tools such as robots and drones. However, these advanced equipment are often powerless when faced with flipped wire clamps and are unable to accurately identify and safely remove them. This seriously restricts the development of intelligent operation and maintenance, increases operational risks, reduces work efficiency, and affects the safe and reliable operation of the power system. Summary of the invention

[0003] In view of this, in order to solve the above-mentioned problems existing in the grounding operation of the ultra-high voltage transmission line by the grounding clamp, an embodiment of the present invention provides an ultra-high voltage anti-flip spiral flat grounding clamp.

[0004] An embodiment of the present invention provides an ultra-high voltage anti-flip spiral flat grounding clamp, comprising:

[0005] an outer frame having an opening on one side thereof;

[0006] A movable clamping block is arranged in the outer frame, and one end of the movable clamping block is slidably connected to a side of the outer frame opposite to the opening;

[0007] An adjusting screw rod, which passes through the upper part of the outer frame and is threadedly connected to the outer frame, and the lower end of the adjusting screw rod is rotatably connected to the movable clamping block;

[0008] A telescopic rod, the upper end of which is connected to the outer frame;

[0009] And a counterweight block connected to the lower end of the telescopic rod.

[0010] Furthermore, the telescopic rod is a multi-section slide rail with adjustable length.

[0011] Furthermore, the counterweight block is detachably connected to the lower end of the telescopic rod.

[0012] Furthermore, the outer frame is U-shaped, the opening faces a horizontal side, and the upper end of the telescopic rod is connected to the outer side surface of the outer frame on a side opposite to the opening.

[0013] Furthermore, a threaded hole is provided on the upper portion of the outer frame, and the adjusting screw is threadedly connected to the threaded hole.

[0014] Furthermore, a vertically arranged guide rail is provided on the inner side surface of the outer frame on the side opposite to the opening, a slide groove is provided at one end of the movable clamping block, and the guide rail is embedded in the slide groove so that the movable clamping block can slide along the guide rail.

[0015] Furthermore, a curved contact surface is provided on the lower surface of the inner wall of the outer frame.

[0016] Furthermore, the bottom surface of the movable clamping block is provided with anti-slip grooves.

[0017] Furthermore, the counterweight block is cylindrical.

[0018] Furthermore, the outer frame is provided with a wire installation hole.

[0019] The beneficial effects brought about by the technical solution provided by the embodiments of the present invention are as follows: an ultra-high voltage anti-flip spiral flat-mouth grounding clamp of the present invention, which is composed of an outer frame, a movable clamp block and an adjusting screw, can clamp the transmission line, and a telescopic rod and a counterweight block are provided at the bottom of the outer frame. The torque generated by the gravity of the counterweight block is used to resist the interference of external forces, so that when the wire clamp is affected by external forces such as natural wind force and the gravity of the grounding wire during the working process of clamping the grounding wire, it will not flip over and can always maintain a vertical state, thereby improving the safety and reliability of the automatic grounding work of the ultra-high voltage transmission line and reducing risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an ultra-high voltage anti-flip spiral flat grounding clamp of the present invention;

[0021] Figure 2 It is a schematic diagram of the installation of the outer frame, movable clamping block and adjusting screw.

[0022] In the figure: 1. outer frame; 2. movable clamping block; 3. adjusting screw; 4. telescopic rod; 5. counterweight; 6. fixing hole; 7. opening; 8. threaded hole; 9. contact surface; 10. guide rail; 11. wire installation hole; 100. transmission line. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in conjunction with the accompanying drawings. The following is a preferred embodiment of the present invention, which is intended to provide a basic understanding of the present invention, but is not intended to confirm the key or decisive elements of the present invention or to limit the scope of protection.

[0024] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0025] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0027] It should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Please refer to Figure 1 and 2 An embodiment of the present invention provides an ultra-high voltage anti-flip spiral flat grounding clamp, comprising an outer frame 1, a movable clamping block 2, an adjusting screw 3, a telescopic rod 4 and a counterweight 5.

[0029] An opening 7 is provided on one side of the outer frame 1 so that the power transmission line 100 can enter the outer frame 1. The opening 7 is generally oriented toward a horizontal side. As in this embodiment, the outer frame 1 is U-shaped, and the opening 7 is located on the left side of the outer frame 1.

[0030] The movable clamp block 2 is arranged in the outer frame 1, and one end of the movable clamp block 2 is slidably connected to the side of the outer frame 1 opposite to the opening 7. Here, the movable clamp block 2 is a rectangular block, and a vertically arranged guide rail 10 is provided on the inner side surface of the side of the outer frame 1 opposite to the opening 7. A slide groove is provided at one end of the movable clamp block 2, and the guide rail 10 is embedded in the slide groove, so that the movable clamp block 2 can slide along the guide rail 10. In this way, the movable clamp block 2 can move vertically in the outer frame 1.

[0031] The adjusting screw 3 passes through the upper part of the outer frame 1 and is threadedly connected to the outer frame 1, and the lower end of the adjusting screw 3 is rotatably connected to the movable clamp 2. Specifically, the adjusting screw 3 is vertically arranged, and the upper part of the outer frame 1 is provided with a threaded hole 8, and the adjusting screw 3 is threadedly connected to the threaded hole 8. The lower end of the adjusting screw 3 is inserted into the upper part of the movable clamp 2 and is rotatably connected to the movable clamp 2, and the rotatable connection can be achieved by a ball joint or the like.

[0032] By turning the adjusting screw 3 to make it rotate and rise and fall, the movable clamp 2 is driven to slide along the guide rail 10, so that the movable clamp 2 is close to or away from the lower surface of the inner wall of the outer frame 1, so that the movable clamp 2 cooperates with the lower surface of the inner wall of the outer frame 1 to clamp or release the power transmission line 100.

[0033] In some embodiments, the lower surface of the inner wall of the outer frame 1 is provided with an arc-shaped contact surface 9. The contact surface 9 preliminarily positions the power line 100 entering the outer frame 1 through the opening 7, and then the active clamp 2 clamps the power line 100.

[0034] In some embodiments, the bottom surface of the movable clamp block 2 is provided with anti-skid grooves. When the movable clamp block 2 clamps the power line 100, the anti-skid grooves contact the upper surface of the power line 100 to prevent the power line 100 from sliding, thereby ensuring that the movable clamp block 2 and the outer frame 1 firmly clamp the power line 100.

[0035] The upper end of the telescopic rod 4 is connected to the outer frame 1. As in this embodiment, the upper end of the telescopic rod 4 is connected to the outer side surface of the outer frame 1 on a side opposite to the opening 7.

[0036] The counterweight 5 is connected to the lower end of the telescopic rod 4. The gravity of the counterweight 5 can generate torque on the outer frame 1, and the torque is used to resist the interference of external forces to prevent the outer frame 1 from turning over. The shape of the counterweight 5 can be flexibly set according to the actual application scenario. For example, in this embodiment, the counterweight 5 is cylindrical.

[0037] The counterweight 5 is generally detachably connected to the lower end of the telescopic rod 4, so that the counterweight 5 of different weights can be replaced. As in this embodiment, the lower end of the telescopic rod 4 is provided with a fixing hole 6, and the counterweight 5 is provided with an axial hole, and the fixing hole 6 is aligned with the axial hole and is fastened by bolts.

[0038] The length of the telescopic rod 4 serves as the lever arm of the torque generated by the gravity of the counterweight 5. The length of the telescopic rod 4 can be freely adjusted, so that the magnitude of the torque generated by the gravity of the counterweight 5 can be adjusted according to actual needs. In this embodiment, the telescopic rod 4 is a multi-section slide rail with adjustable length.

[0039] It should be noted that the maximum torque M that the counterweight block 5 can provide is:

[0040] M=mgsinθ*L*n

[0041] Where: m——weight of counterweight;

[0042] g——acceleration due to gravity;

[0043] θ——Angle between the multi-section slide rail and the vertical direction;

[0044] L——single slide rail length;

[0045] n——Number of slide rail sections.

[0046] In actual operation, the grounding wire is generally installed on the outer frame 1. In this embodiment, the outer frame 1 is provided with a wire installation hole 11, and one end of the grounding wire is installed in the wire installation hole 11. Then, by selecting a suitable mass counterweight block 5 and the number of slide rail sections, it is possible to effectively prevent the outer frame 1 from flipping due to the swing of the grounding wire caused by wind or other external forces when the outer frame 1 is working.

[0047] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0048] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-high voltage anti-flip spiral flat grounding clamp, characterized in that: include: an outer frame having an opening on one side thereof; A movable clamping block is arranged in the outer frame, and one end of the movable clamping block is slidably connected to a side of the outer frame opposite to the opening; An adjusting screw rod, which passes through the upper part of the outer frame and is threadedly connected to the outer frame, and the lower end of the adjusting screw rod is rotatably connected to the movable clamping block; A telescopic rod, the upper end of which is connected to the outer frame; And a counterweight block connected to the lower end of the telescopic rod.

2. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: The telescopic rod is a multi-section slide rail with adjustable length.

3. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: The counterweight block is detachably connected to the lower end of the telescopic rod.

4. An ultra-high voltage anti-flip spiral flat grounding clamp according to any one of claims 1 to 3, characterized in that: The outer frame is U-shaped, the opening faces a horizontal side, and the upper end of the telescopic rod is connected to the outer side surface of the outer frame on a side opposite to the opening.

5. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: A threaded hole is provided on the upper portion of the outer frame, and the adjusting screw is threadedly connected to the threaded hole.

6. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: A vertically arranged guide rail is provided on the inner side surface of the outer frame on the side opposite to the opening, a slide groove is provided at one end of the movable clamping block, and the guide rail is embedded in the slide groove so that the movable clamping block can slide along the guide rail.

7. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: The lower surface of the inner wall of the outer frame is provided with an arc-shaped contact surface.

8. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: The bottom surface of the movable clamping block is provided with anti-slip grooves.

9. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: The counterweight block is cylindrical.

10. The ultra-high voltage anti-flip spiral flat grounding clamp according to claim 1, characterized in that: The outer frame is provided with a wire installation hole.

Images