Bolt type strain clamp for overhead line

Abstract

The utility model relates to a bolt type strain clamp for an overhead line, which comprises a supporting groove, the supporting groove is divided into a horizontal supporting groove and an inclined supporting groove, the tail end of the horizontal supporting groove is fixedly connected with the top end of the inclined supporting groove, the tail end of the horizontal supporting groove is provided with a rotatable pressing block, one end of the pressing block is provided with a tensioning hole, the inclined supporting groove is fixedly connected with a major arc-shaped sliding groove, and the inclined supporting groove is fixedly connected with a bolt. An arc-shaped pressing block is slidably connected into the sliding groove, screw holes are formed in the two ends of the sliding groove, fastening screws are connected into the screw holes in a threaded mode and abut against the arc-shaped pressing block, and a limiting plate is arranged on one side in the sliding groove and located below the screw holes. According to the bolt type strain clamp for the overhead line, the arc-shaped pressing block which can slide telescopically and the set screw are matched to compress a wire, the arc-shaped pressing block can retract into the sliding groove when the bolt type strain clamp is not used, field assembly is not needed, installation is easy, and accessories are not prone to being lost.

Description

Technical Field

[0001] The utility model relates to electric power technology, in particular to an overhead line bolt type tension clamp. Background Art

[0002] At present, tension clamps are usually used to fix and tighten the ground wire on the tension towers of overhead power transmission, substation and distribution equipment. The tension clamps mainly include compression type, bolt type, wedge type and pre-twisted tension clamps. Among them, the bolt type tension clamp uses the vertical pressure generated by the tightening of the U-bolt to act on the pressure block and the clamp body to compress the stranded wire, so that friction is generated between the stranded wire and the clamp to prevent the relative movement of the stranded wire. Different groups of U-bolts are configured according to the different diameters and rated tensile strengths of the ground wire to achieve the specified grip value.

[0003] The existing bolt-type tension clamp is assembled by using different accessories when in use. During the assembly, grooves, U-bolts, pressure plates and metal tie straps are required to be used together, which leads to problems such as complex installation and easy loss of accessories. Utility Model Content

[0004] The utility model aims to provide an overhead line bolt type tension clamp, which is used to solve the problems of scattered accessories of the overhead line bolt type tension clamp, complicated installation and easy loss of accessories.

[0005] In order to solve the above problems, the utility model provides an overhead line bolt-type tension clamp, including a bracket, the bracket is divided into a horizontal bracket and an oblique bracket, the tail end of the horizontal bracket is fixedly connected to the top end of the oblique bracket, a rotatable clamping block is provided at the tail end of the horizontal bracket, a tensioning hole is opened at one end of the clamping block, an arc-shaped slide groove is fixedly connected to the oblique bracket, an arc-shaped clamping block is slidably connected in the slide groove, screw holes are provided at both ends of the slide groove, a fixing screw is threadedly connected in the screw hole, the fixing screw top contacts the arc-shaped clamping block, a limit plate is provided on one side of the slide groove, and the limit plate is located below the screw hole.

[0006] The utility model provides an overhead line bolt type tension clamp which also has the following technical features:

[0007] Further, the oblique bracket is disconnected in the slide slot.

[0008] Furthermore, a baffle is provided on the inner edge of the slide groove, and convex edges matching with the baffle are provided on both sides of the arc-shaped pressing block to restrict the arc-shaped pressing block from sliding in the slide groove.

[0009] Furthermore, an axial hole is provided at the other end of the pressing block, a telescopic shaft is provided in the axial hole, two fin plates are provided at the tail end of the horizontal bracket, and through holes are provided on the two fin plates for the telescopic shaft to extend and rotate.

[0010] Furthermore, a limit groove is provided on the shaft hole, a sliding rod is slidably connected in the limit groove, the sliding rod is fixedly connected to the telescopic shaft, a spring is sleeved on the telescopic shaft, one end of the spring touches the wing plate, and the other end of the spring touches the sliding rod.

[0011] Furthermore, a hinge plate is provided at the bottom of the fin plate on one side of the spring, so that the pressing block can be turned outward along with the fin plate.

[0012] Furthermore, the pressing block is provided with a protrusion at one end of the shaft hole, and the protrusion is provided with anti-slip teeth.

[0013] The utility model has the following beneficial effects: the bolt-type tension clamp for overhead lines described in the present application adopts a telescopic and sliding arc-shaped pressure block and a set screw to complete the compression of the conductor. When not in use, the arc-shaped pressure block can be retracted into the slide groove, no on-site assembly is required, the installation is simple, and the accessories are not easy to lose. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an axonometric schematic diagram of an overhead line bolt-type tension clamp according to an embodiment of the utility model;

[0015] Figure 2 The overhead line bolt type tension clamp of the utility model embodiment Figure 1 A node zoomed in;

[0016] Figure 3 The overhead line bolt type tension clamp of the utility model embodiment Figure 1 Enlarged view of node B in the middle;

[0017] Figure 4 It is a top view schematic diagram of an overhead line bolt-type tension clamp according to an embodiment of the utility model;

[0018] Figure 5 It is a right side cross-sectional schematic diagram of an overhead line bolt type tension clamp according to an embodiment of the utility model;

[0019] Figure 6 The utility model is a schematic cross-sectional view of the overhead line bolt type tension clamp slideway according to an embodiment of the utility model.

[0020] (1-horizontal bracket, 2-oblique bracket, 3-pressing block, 4-tensioning hole, 5-slide, 6-arc-shaped pressing block, 7-screw hole, 8-tightening screw, 9-limiting plate, 10-baffle, 11-convex edge, 12-axis hole, 13-telescopic axis, 14-fin plate, 15-through hole, 16-limiting groove, 17-sliding rod, 18-spring, 19-hinge plate, 20-anti-slip tooth) DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0022] like Figures 1 to 6 In the embodiment of the overhead line bolt-type tension clamp of the utility model shown, the overhead line bolt-type tension clamp includes a bracket, which is divided into a horizontal bracket 1 and an oblique bracket 2. The tail end of the horizontal bracket 1 is fixedly connected to the top end of the oblique bracket 2, and a rotatable clamping block 3 is provided at the tail end of the horizontal bracket 1. A tensioning hole 4 is opened at one end of the clamping block 3. An arc-shaped slide groove 5 is fixedly connected to the oblique bracket 2, and an arc-shaped pressure block 6 is slidably connected in the slide groove 5. Screw holes 7 are provided at both ends of the slide groove 5. A tightening screw 8 is threadedly connected in the screw hole 7. The tightening screw 8 touches the arc-shaped pressure block 6. A limit plate 9 is provided on one side of the slide groove 5, and the limit plate 9 is located below the screw hole 7.

[0023] Specifically, the cable is passed into the bracket, and the clamping block 3 is rotated to make the cable pass under the clamping block 3. When tightening, the arc-shaped clamping block 6 is extended from the slide groove 5, and the arc-shaped clamping block 6 is slid to the top of the cable. At this time, the tightening screw 8 is tightened to make the arc-shaped clamping block 6 clamp the cable. After the tightening is completed, when the cable is tensioned through the tensioning hole 4, the clamping block 3 clamps the cable. The greater the tensioning force, the tighter the clamping block 3 is pressed. When disassembling, the tightening screw 8 is loosened to retract the arc-shaped clamping block 6 into the slide groove 5, and the tightening screw 8 on the retracted side is tightened to prevent the arc-shaped clamping block 6 from slipping out. While ensuring that the clamping does not fall off, the installation is simple, no on-site assembly is required, and the accessories are not easily lost.

[0024] In one embodiment of the present application, preferably, the oblique bracket 2 is disconnected in the slide groove 5. When the arc-shaped pressure block 6 is pressed, the cable is slightly deformed at the disconnection point, thereby increasing the friction between the oblique bracket 2 and the cable and preventing it from slipping.

[0025] In one embodiment of the present application, preferably, a baffle 10 is provided on the inner edge of the slide groove 5, and convex edges 11 adapted to the baffle 10 are provided on both sides of the arc-shaped pressing block 6 to restrict the arc-shaped pressing block 6 from sliding in the slide groove 5 and prevent the arc-shaped pressing block 6 from falling off from the slide groove 5.

[0026] In one embodiment of the present application, preferably, an axial hole 12 is provided at the other end of the clamping block 3, a telescopic shaft 13 is provided in the axial hole 12, and two fin plates 14 are provided at the tail end of the horizontal bracket 1. The two fin plates 14 are provided with through holes 15 for the telescopic shaft 13 to extend and rotate, and the clamping block 3 is used to rotate around the position of the through hole 15. The telescopic shaft 13 can disassemble the clamping block 3 to facilitate the installation of cables.

[0027] In one embodiment of the present application, preferably, a limit groove 16 is provided on the shaft hole 12, and a sliding rod 17 is slidably connected in the limit groove 16. The sliding rod 17 is fixedly connected to the telescopic shaft 13, and a spring 18 is sleeved on the telescopic shaft 13. One end of the spring 18 touches the fin plate 14, and the other end of the spring 18 touches the sliding rod 17. When the sliding rod 17 slides, the telescopic shaft 13 retracts from the through hole 15 on the fin plate 14 on the other side to facilitate the disassembly of the clamping block 3.

[0028] In one embodiment of the present application, preferably, a hinge plate 19 is provided at the bottom of the fin plate 14 on one side of the spring 18, so that the clamping block 3 is flipped outward with the fin plate 14, so that after the telescopic shaft 13 is retracted, the clamping block 3 and the fin plate 14 are flipped outward, which is convenient for the installation of the cable.

[0029] In one embodiment of the present application, preferably, the clamping block 3 is provided with a protrusion at one end of the axial hole 12, and the protrusion is provided with an anti-slip tooth 20, so that during tensioning, the clamping block 3 is pressed tighter as the tensioning force increases, and the anti-slip tooth 20 rubs against the cable, causing the clamping block 3 to rotate and tighten when the cable slides, thereby preventing the cable from continuing to slide.

[0030] In summary, the bolt-type tension clamp for overhead lines in the above-mentioned embodiment of the utility model, specifically, makes the sliding rod 17 compress the spring 18 to retract the telescopic shaft 13 from the through hole 15 of the fin plate 14, turns the clamping block 3 outside, puts the cable into the bracket, turns the clamping block 3 back, loosens the sliding rod 17, and under the action of the spring 18, the telescopic shaft 13 extends out of the through hole 15, loosens the fixing screw 8 to make the arc-shaped clamping block 6 extend from the slide groove 5, and makes the arc-shaped clamping block 6 slide to the top of the cable. Tighten the fixing screws 8 at both ends of the slide groove 5 to make the arc-shaped pressure block 6 press the cable. When the cable is tensioned through the tensioning hole 4 after tightening, the pressure block 3 rotates under the influence of the tensioning force, and the pressure block 3 presses the cable. The greater the tensioning force, the tighter the pressure block 3 presses. When disassembling, loosen the fixing screw 8 to retract the arc-shaped pressure block 6 into the slide groove 5, and tighten the fixing screw 8 on the retracted side to prevent the arc-shaped pressure block 6 from slipping out. While ensuring that the pressure does not fall off, the installation is simple, no on-site assembly is required, and the accessories are not easily lost.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A bolt-type tension clamp for overhead lines, It is characterized in that It includes a bracket, which is divided into a horizontal bracket and an oblique bracket. The tail end of the horizontal bracket is fixedly connected to the top end of the oblique bracket, and a rotatable clamping block is provided at the tail end of the horizontal bracket. A tensioning hole is opened at one end of the clamping block. An arc-shaped slide groove is fixedly connected to the oblique bracket, and an arc-shaped clamping block is slidably connected in the slide groove. Screw holes are provided at both ends of the slide groove, and a fixing screw is threadedly connected in the screw hole. The fixing screw contacts the arc-shaped clamping block, and a limit plate is provided on one side of the slide groove, and the limit plate is located below the screw hole.

2. The overhead line bolt type tension clamp according to claim 1, Features: The oblique bracket is disconnected in the slide groove.

3. The overhead line bolt type tension clamp according to claim 2, Features: The inner edge of the slide groove is provided with a baffle, and the two sides of the arc-shaped pressing block are provided with convex edges matched with the baffle to limit the arc-shaped pressing block to slide in the slide groove.

4. The overhead line bolt type tension clamp according to claim 1, Features: The other end of the clamping block is provided with an axial hole, in which a telescopic shaft is arranged, and the tail end of the horizontal bracket is provided with two fin plates, and the two fin plates are provided with through holes for the telescopic shaft to extend and rotate.

5. The overhead line bolt type tension clamp according to claim 4, Features: The shaft hole is provided with a limiting groove, a sliding rod is slidably connected in the limiting groove, the sliding rod is fixedly connected to the telescopic shaft, a spring is sleeved on the telescopic shaft, one end of the spring contacts the wing plate, and the other end of the spring contacts the sliding rod.

6. The overhead line bolt type tension clamp according to claim 5, Features: A hinge plate is provided at the bottom of the fin plate on one side of the spring, so that the pressing block can be turned outward along with the fin plate.

7. The overhead line bolt type tension clamp according to claim 6, Features: The pressing block is provided with a protrusion at one end of the shaft hole, and the protrusion is provided with anti-slip teeth.

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