A tension clamp for power transmission lines

Abstract

This invention relates to the field of power line installation technology, and specifically provides a tension clamp for power transmission lines, comprising: a housing and two wedges. The housing has a wedge-shaped through groove along its length; a baffle is provided on the side of the groove opening, and a accumulator cylinder is provided on the baffle, connected to a tension rope; the two wedges are positioned opposite each other in the through groove, clamping the power transmission line between them; a rotating shaft is provided on the wedge opposite the baffle, connected to the opposite tension rope; the rotating shaft and the power transmission line are in frictional contact, and the shaft rotates when the power transmission line slides relative to the wedges, causing the tension rope to wind around the shaft. The present invention, by setting up the accumulator cylinder, rotating shaft, and tension rope, allows the rotating shaft to rotate due to friction when the power transmission line slides relative to the wedges, causing the tension rope to wind around the shaft. This increases the frictional resistance between the housing, wedges, and power transmission line, thereby improving the clamping effect on the power transmission line and reducing the risk of the power transmission line falling off.

Description

Technical Field

[0001] This invention relates to the field of wire installation technology, and in particular to a tension clamp for power transmission lines. Background Technology

[0002] As a core connecting component in power transmission, rail transit, and communication engineering, wire clamps directly impact the safe operation of systems due to their technical reliability. Existing wire clamps typically employ a semi-open structure. Under prolonged tension from the conductor, the semi-open outer shell is prone to irreversible plastic deformation, leading to a reduction in the contact area between the clamp and the wire, a decrease in clamping force, and consequently, wire slippage or even detachment. Secondly, during installation, if the operator fails to fully push the wedge block into its designed position, it will not effectively engage with the wedge-shaped mating surface of the outer shell, making it highly susceptible to accidental detachment under vibration or external impact, directly threatening the safety of line operation. Furthermore, when the wedge block slips against the wire surface due to oil, oxide layers, or other factors, existing wedge blocks cannot increase self-locking force, leaving the wire in a slack state, failing to meet the tension requirements for power transmission or mechanical load bearing. Summary of the Invention

[0003] One objective of this invention is to improve the clamping effect on power transmission lines and reduce the risk of power transmission lines falling off.

[0004] Specifically, the present invention provides a tension clamp for a power transmission line, comprising: a housing having a wedge-shaped through groove along its length; a baffle plate being provided on the side of the groove opening, a accumulator cylinder being provided on the baffle plate, and a tension rope being connected to the accumulator cylinder; two wedges being disposed opposite each other in the through groove, with the power transmission line clamped between the two wedges; an arc-shaped groove being provided on the opposite sidewalls of the two wedges, the curvature of the groove being adapted to the shape of the power transmission line; a rotating shaft being provided on the wedge opposite the baffle, the rotating shaft being connected to the opposite tension rope; a mounting hole being provided on the wedge, the wall of the mounting hole having an opening communicating with the bottom of the groove; the rotating shaft being rotatably placed in the mounting hole and making frictional contact with the power transmission line through the opening; the rotating shaft rotating when the power transmission line slides relative to the wedge, causing the tension rope to wind around the rotating shaft.

[0005] Furthermore, a baffle is provided on each side of the slot opening, and a power storage cylinder is provided on each baffle, and a tension rope is connected to each power storage cylinder; a rotating shaft is provided on each wedge, and the two rotating shafts and the two power storage cylinders are connected crosswise by two tension ropes.

[0006] Furthermore, a rotating cylinder is fixed in the mounting hole, and a through hole is provided in the area of ​​the rotating cylinder opposite to the opening. The rotating shaft is rotatably installed in the rotating cylinder and makes frictional contact with the power transmission line through the through hole and the opening.

[0007] Furthermore, ratchet teeth are provided on the side wall of the rotating shaft, and tooth grooves that match the ratchet teeth are provided inside the rotating cylinder.

[0008] Furthermore, an annular groove is provided on the side wall of the shaft for placing the winding tension rope; the tension rope extends into the groove and passes through the shaft radially.

[0009] Furthermore, ribs are provided on the outer periphery of the shell.

[0010] Furthermore, a sliding movable plate is provided in the accumulator, and the tensioning rope extends into the accumulator and is fixedly connected to the movable plate; a compression spring is sleeved on the tensioning rope, one end of the compression spring abuts against the end wall of the accumulator, and the other end abuts against the movable plate.

[0011] Furthermore, a U-shaped connecting rod is provided on the side wall of the housing near the large-diameter end of the through groove; two fixing rings are provided on opposite sides of the housing, and the two ends of the connecting rod pass through the two fixing rings respectively and are connected to the locking nut.

[0012] The beneficial effects of this invention are:

[0013] The tension clamp for transmission lines of the present invention features a accumulator cylinder mounted on a baffle plate of the housing, a rotating shaft that frictionally contacts the transmission line on opposing wedges, and a tension rope connecting the rotating shaft and the accumulator cylinder. When the transmission line slides relative to the wedges, friction causes the rotating shaft to rotate, thereby winding the tension rope around the shaft. This winding of the tension rope further tightens the connection between the housing and the wedges, increasing the frictional resistance between the housing, wedges, and transmission line, thus improving the clamping effect on the transmission line and reducing the risk of it detaching.

[0014] Furthermore, the tension clamp for transmission lines of the present invention, by setting a baffle with a power storage cylinder on both sides of the through groove of the housing, and setting a rotating shaft on each of the two wedges, so that the two rotating shafts and the two power storage cylinders are cross-connected by two tensioning ropes, not only further improves the tensioning effect and reduces the risk of the transmission line falling off, but also makes the forces on the housing and wedges more balanced and improves the structural stability.

[0015] Furthermore, the tension clamp for transmission lines of the present invention, by fixing a rotating drum inside a wedge block and setting a rotating shaft to rotate unidirectionally relative to the rotating drum, ensures that the rotating shaft can only rotate in the direction of winding the tension rope and cannot reverse to loosen the tension rope, thereby reducing the tension effect of the tension rope and reducing the risk of transmission line derailment. Attached Figure Description

[0016] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a tension clamp for a transmission line according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the tension clamp of a transmission line from another angle according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the tension clamp of a transmission line at another angle according to an embodiment of the present invention;

[0020] Figure 4 It is along Figure 3 A schematic cross-sectional view taken by the cutting line AA in the diagram;

[0021] Figure 5 It is along Figure 3 A schematic cross-sectional view cut off by the section line BB in the diagram;

[0022] Figure 6 yes Figure 5 A schematic enlarged view of region C in the middle;

[0023] Figure 7 This is an exploded view of a tension clamp for a transmission line according to an embodiment of the present invention;

[0024] Figure 8 yes Figure 7 A schematic enlarged view of region D in the middle.

[0025] in:

[0026] 01. Transmission line; 100. Housing; 110. Through groove; 111. Baffle; 120. Energy storage cylinder; 121. Moving plate; 122. Compression spring; 130. Tensioning rope; 140. Rib; 150. Connecting rod; 160. Fixing ring; 170. Locking nut; 200. Wedge; 210. Groove; 220. Mounting hole; 221. Opening; 230. Rotating drum; 231. Through hole; 232. Tooth groove; 233. One-way ring; 240. Material saving groove; 300. Rotating shaft; 310. Racket tooth; 320. Wire groove; 330. Limiting ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0028] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0029] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The following reference Figures 1 to 8 This invention describes a tension clamp for a power transmission line.

[0031] This embodiment provides a tension clamp for a power transmission line. The tension clamp for a power transmission line generally includes a housing 100 and two wedges 200.

[0032] The housing 100 has a wedge-shaped through groove 110 along its length. A baffle 111 is provided on the side of the groove opening of the through groove 110, and a accumulator 120 is mounted on the baffle 111, connected to a tension rope 130. Two wedges 200 are positioned opposite each other in the through groove 110, clamping the power transmission line 01 between them. Arc-shaped grooves 210 are provided on the opposite sidewalls of the two wedges 200, the curvature of which matches the shape of the power transmission line 01. A rotating shaft 300 is provided on the wedge 200 opposite to the baffle 111, connected to the opposite tension rope 130. A mounting hole 220 is provided on the wedge 200, with an opening 221 on its wall, communicating with the bottom of the groove 210. The shaft 300 is rotatably placed in the mounting hole 220 and makes frictional contact with the transmission line 01 through the opening 221. The shaft 300 rotates when the transmission line 01 slides relative to the wedge 200, causing the tension rope 130 to be wound around the shaft 300.

[0033] In this embodiment, a power storage cylinder 120 is provided on the baffle 111 of the housing 100, and a rotating shaft 300 that frictionally contacts the transmission line 01 is provided on the opposing wedge 200. A tension rope 130 is provided between the rotating shaft 300 and the power storage cylinder 120. When the transmission line 01 slides relative to the wedge 200, the rotating shaft 300 is driven to rotate through friction, thereby causing the tension rope 130 to wind around the rotating shaft 300. The winding of the tension rope 130 further tightens the space between the housing 100 and the wedge 200, thereby increasing the frictional resistance between the housing 100, the wedge 200, and the transmission line 01. This further prevents the transmission line 01 from sliding further relative to the wedge 200, improves the clamping effect on the transmission line 01, and reduces the risk of the transmission line 01 falling off.

[0034] Furthermore, the rotating shaft 300 rotates under the friction of the transmission line 01, allowing it to wind up the tension rope 130 according to the looseness of the transmission line 01. This ensures that the tension of the tension rope 130 matches the tightness of the transmission line 01. The looser the transmission line 01, the greater its sliding distance relative to the wedge block 200, resulting in a longer winding length of the tension rope 130. This, in turn, increases the tightening force between the housing 100 and the wedge block 200 until the transmission line 01 stops sliding.

[0035] Furthermore, in this embodiment, the through groove 110 of the housing 100 is set as a wedge shape, and a suitable wedge block 200 is provided in the through groove 110 to clamp the transmission line 01. It is also made so that when the transmission line 01 drives the wedge block 200 to slide relative to the housing 100, the greater the degree of sliding of the wedge block 200, the greater the clamping force from the housing 100. Thus, by utilizing the structural characteristics of the wedge-shaped through groove 110 and the wedge block 200, the risk of the transmission line 01 falling off is further reduced.

[0036] In this embodiment, an arc-shaped groove 210 adapted to the shape of the transmission line 01 is provided on the side wall of the wedge 200 facing the transmission line 01, so that the wedge 200 and the transmission line 01 fit more tightly, thereby improving the clamping effect on the transmission line 01.

[0037] In this embodiment, by providing a mounting hole 220 on the wedge 200 and an opening 221 on the wall of the mounting hole 220 that communicates with the bottom of the groove 210, a portion of the sidewall of the rotating shaft 300 can make frictional contact with the power transmission line 01 through the opening 221. This ensures that the rotating shaft 300 can rotate synchronously with the sliding of the power transmission line 01 while improving structural stability.

[0038] like Figure 7 As shown, multiple spaced-apart material-saving grooves 240 can be provided on the outer wall of the wedge block 200 to reduce production costs.

[0039] In a further embodiment, a baffle 111 is provided on each side of the opening of the through groove 110, and a power storage cylinder 120 is provided on each baffle 111, and a tension rope 130 is connected to each power storage cylinder 120. A rotating shaft 300 is provided on each wedge 200, and the two rotating shafts 300 and the two power storage cylinders 120 are cross-connected by two tension ropes 130.

[0040] In this embodiment, a baffle 111 with a power storage cylinder 120 is provided on each side of the through groove 110 of the housing 100, and a rotating shaft 300 is provided on each of the two wedges 200. The two rotating shafts 300 and the two power storage cylinders 120 are cross-connected by two tension ropes 130. This not only further improves the tensioning effect and reduces the risk of the power transmission line 01 falling off, but also makes the forces on the housing 100 and the wedges 200 more balanced and improves the structural stability.

[0041] In some embodiments, the sidewall of the wedge 200 facing the transmission line 01 can be a straight wall, and a cylindrical groove adapted to the shape of the rotating shaft 300 can be provided on the sidewall of the wedge 200, with the rotating shaft 300 clamped between the cylindrical groove and the transmission line 01.

[0042] In a further embodiment, a rotating cylinder 230 is fixed in the mounting hole 220, and a through hole 231 is provided in the area of ​​the rotating cylinder 230 opposite to the opening 221. The rotating shaft 300 is rotatably disposed in the rotating cylinder 230 and makes frictional contact with the power transmission line 01 through the through hole 231 and the opening 221.

[0043] In this embodiment, by fixing the rotating drum 230 in the mounting hole 220, the rotating shaft 300 is placed in the rotating drum 230 and the rotating shaft 300 is set to rotate unidirectionally relative to the rotating drum 230, so that the rotating shaft 300 can only rotate in the direction of winding the tension rope 130, and cannot rotate in the opposite direction to loosen the tension rope 130, thereby ensuring the tensioning effect of the tension rope 130 and reducing the risk of the transmission line 01 falling off.

[0044] In some embodiments, the wedge 200 may be made of an elastic material, such as rubber. The rotating drum 230 may be bonded to the wedge 200 with an adhesive.

[0045] In order to enable the rotating shaft 300 to rotate unidirectionally in the rotating drum 230, in some embodiments, a ratchet 310 is provided on the side wall of the rotating shaft 300, and a tooth groove 232 adapted to the ratchet 310 is provided inside the rotating drum 230.

[0046] In this embodiment, by providing ratchet 310 on the side wall of the rotating shaft 300 and providing tooth groove 232 adapted to the ratchet 310 in the rotating drum 230, the rotating drum 230 can only be rotated in the direction of winding the tension rope 130, thereby ensuring the tensioning effect of the tension rope 130 and reducing the risk of the transmission line 01 falling off.

[0047] like Figures 7-8 As shown, in some embodiments, a one-way ring 233 may be provided inside the rotating cylinder 230, and the one-way ring 233 is engaged with the rotating cylinder 230. The inner side of the one-way ring 233 is provided with a tooth groove 232 that matches the ratchet 310, and the ratchet 310 on the rotating shaft 300 is made of an elastic material. In other embodiments, the rotating cylinder 230 and the one-way ring 233 may be integrally formed.

[0048] To enable unidirectional rotation of the shaft 300 within the drum 230, in some embodiments, a wedge-shaped groove may be formed on the inner wall of the drum 230, and a roller and a spring may be disposed between the drum 230 and the shaft 300. The two ends of the spring are connected to the roller and the wide end of the wedge-shaped groove, respectively. Unidirectional locking is achieved by the movement of the roller within the wedge-shaped groove between the shaft 300 and the drum 230. When the shaft 300 rotates forward, the roller moves towards the wide end of the wedge-shaped groove and does not transmit force; when the shaft 300 rotates in the reverse direction, the roller is wedged into the narrow end, preventing rotation.

[0049] An annular groove 320 is provided on the side wall of the rotating shaft 300 for holding the winding tension rope 130. The tension rope 130 extends into the groove 320 and passes through the rotating shaft 300 radially.

[0050] In this embodiment, by providing a groove 320 on the side wall, the tension rope 130 is evenly wound around the shaft 300 in the groove 320 when the shaft 300 rotates, thereby avoiding excessive local tension caused by uneven winding of the tension rope 130 and ensuring its service life.

[0051] like Figure 8 As shown, in some embodiments, two spaced limiting rings 330 may be provided on the side wall of the rotating shaft 300. The two limiting rings 330 are respectively provided on both sides of the wire groove 320 and flush with the groove wall of the wire groove 320, thereby reducing the risk of the tension rope 130 coming out of the wire groove 320.

[0052] Ribs 140 are provided on the outer periphery of the housing 100.

[0053] In this embodiment, by providing ribs 140 on the outer periphery of the housing 100, the structural strength of the housing 100 is increased and its service life is improved.

[0054] like Figure 1As shown, in some preferred embodiments, the outer periphery of the housing 100 may be provided with a plurality of ribs 140 at intervals to further improve the structural strength.

[0055] A slidable movable plate 121 is provided in the power storage cylinder 120. The tension rope 130 extends into the power storage cylinder 120 and is fixedly connected to the movable plate 121. A compression spring 122 is sleeved on the tension rope 130. One end of the compression spring 122 abuts against the end wall of the power storage cylinder 120, and the other end abuts against the movable plate 121.

[0056] In this embodiment, a movable plate 121 connected to the tension rope 130 is provided in the accumulator 120, and a compression spring 122 is sleeved on the tension rope 130, which abuts against the movable plate 121 and the accumulator 120. When the tension rope 130 is wound up, the movable plate 121 presses against the compression spring 122, causing the compression spring 122 to compress, thereby increasing the tension of the tension rope 130.

[0057] like Figure 4 As shown, when the tension rope 130 is not wound up, one end of it passing through the rotating shaft 300 is parallel to the axis of the transmission line 01. The moving plate 121 is located in the middle section of the accumulator 120 and presses against the compression spring 122, so that the compression spring 122 has a certain amount of pre-compression. Thus, when the wedge block 200 slides relative to the housing 100, the moving plate 121, under the action of the compression spring 122, moves away from the rotating shaft 300 and can pull the tension rope 130, so that the tension rope 130 can still maintain a taut state.

[0058] A U-shaped connecting rod 150 is provided on the side wall of the housing 100 near the large-diameter end of the through groove 110. Two fixing rings 160 are provided opposite to each other on both sides of the housing 100. The two ends of the connecting rod 150 pass through the two fixing rings 160 respectively and are connected to the locking nut 170.

[0059] In this embodiment, a U-shaped connecting rod 150 is provided on the side wall of the housing 100 near the large-diameter end of the through groove 110 for connecting external equipment, such as a tension tower. The connecting rod 150 passes through the fixing rings 160 on both sides of the housing 100 and is connected to the locking nut 170 for limiting the position. This design is not only simple in structure and low in cost, but also convenient to install.

[0060] like Figure 2 As shown, in some embodiments, the end of the connecting rod 150 passing through the retaining ring 160 may be connected to a plurality of locking nuts 170 to improve the locking effect.

[0061] The specific working process of a tension clamp for a transmission line provided by the present invention will be described in conjunction with the above embodiments:

[0062] First, the transmission line 01 is clamped between two wedges 200. Then, the two wedges 200 are placed in the through groove 110 of the housing 100 and pushed against the large-diameter ends of the two wedges 200, so that the two wedges 200 are pressed tightly against the housing 100. After that, the tension rope 130 is pulled, and the two rotating shafts 300 connected to the tension rope 130 are respectively inserted into the rotating drums 230 on the two opposite wedges 200, so that the two tension ropes 130 are arranged crosswise.

[0063] During the clamping of the transmission line 01, when the transmission line 01 slides relative to the wedge 200 toward the small diameter end of the wedge 200, the transmission line 01 drives the rotating shaft 300, which is in frictional contact with it, to rotate, thereby causing the tension rope 130 to wind around the rotating shaft 300.

[0064] When the tension rope 130 is wound up, it pulls the moving plate 121 to press against the compression spring 122, causing the compression spring 122 to be compressed. This increases the radial tension of the tension rope 130 acting on the baffle 111 and the wedge block 200, thereby increasing the frictional resistance between the housing 100, the wedge block 200, and the power transmission line 01. This prevents the power transmission line 01 from sliding and reduces the risk of the power transmission line 01 falling off.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A strain clamp for a power transmission line, characterized by, The utility model relates to a kind of tensioning device of power transmission line, including: Shell is provided with wedge-shaped through slot along its length direction;The side of the notch of through slot is provided with baffle, baffle is provided with force cylinder, force cylinder is connected with tensioning rope; Two wedge blocks are oppositely arranged in through slot, and power transmission line is clamped between two wedge blocks;The opposite side wall of two wedge blocks is provided with arc-shaped groove, and the curvature of groove is adapted to the shape of power transmission line;Opposite wedge block is provided with rotating shaft, and rotating shaft is connected with opposite tensioning rope; Wedge block is provided with mounting hole, and opening is arranged on the hole wall of mounting hole and communicated with the groove bottom of groove;Rotating shaft is rotatably placed in mounting hole and frictionally contacted with power transmission line through opening;Rotating shaft rotates when power transmission line slides relative to wedge block, so that tensioning rope is wound around rotating shaft; The both sides of the notch of through slot are respectively provided with one baffle, each baffle is provided with one force cylinder, and each force cylinder is connected with one tensioning rope;Each wedge block is provided with one rotating shaft, and two rotating shafts and two force cylinders are cross-connected by two tensioning ropes;Slidable moving plate is arranged in force cylinder, and tensioning rope extends into force cylinder and is fixedly connected with moving plate;Compression spring is sleeved on tensioning rope, one end of compression spring abuts against end wall of force cylinder, and the other end abuts against moving plate; Rotating cylinder is fixed in mounting hole, rotating cylinder is provided with through hole in the region opposite to opening, and rotating shaft is unidirectionally rotatably arranged in rotating cylinder and frictionally contacted with power transmission line through through hole and opening; Ratchet is arranged on the side wall of rotating shaft, and one-way ring is arranged in rotating cylinder and clamped with rotating cylinder, the inner side of one-way ring is provided with tooth groove matched with ratchet, and ratchet on rotating shaft is made of elastic material.

2. A strain clamp for a power transmission line according to claim 1, characterised in that, Annular wire slot is arranged on the side wall of rotating shaft, for placing wound tensioning rope;Tensioning rope extends into wire slot and passes through rotating shaft along the radial direction of rotating shaft.

3. The strain clamp of a power transmission line according to claim 1, characterized in that, Rib is arranged on the outer periphery of shell.

4. The strain clamp of a power transmission line according to claim 1, characterized in that, U-shaped connecting rod is arranged on the side wall of shell close to the large-diameter end of through slot;Two fixed rings are oppositely arranged on the two sides of shell, and the two ends of connecting rod pass through two fixed rings respectively and are connected with lock nut.

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