Anti-slip locking wedge strain clamp

Abstract

This invention discloses an anti-slip locking wedge-shaped tension clamp, belonging to the field of cable installation technology. The clamp includes a wedge-shaped shell, two left and right clamping cores, and an anti-slip locking mechanism. The left and right clamping cores are inserted into the wedge-shaped core cavity of the wedge-shaped shell, forming a clamping cavity between them. The anti-slip locking mechanism includes a slide block, an anti-slip plate, a triangular plate, a pressure plate bolt, a first spring, a pressure plate nut, an anti-slip screw, a second spring, a contact sleeve, and an anti-slip nut. By tightening the anti-slip nut, the anti-slip plate is pressed against the anti-slip rail, and simultaneously, the triangular plate, under the action of the pressure plate nut and the first spring, presses against the slide block, forming multiple locking mechanisms. Two sets of anti-slip locking mechanisms are provided at each end of the left and right clamping cores; the two sets at the same end are linked by a connecting rod and a connecting ear to achieve synchronous locking. This invention has advantages such as strong anti-slip performance, uniform locking force, convenient installation, and adaptability to wedge-shaped structures, significantly improving the reliability and construction efficiency of tension clamps.

Description

Technical Field

[0001] This invention relates to the field of cable installation technology, and specifically to a wedge-shaped tension clamp with anti-slip locking mechanism. Background Technology

[0002] Tension clamps are key hardware components used in power lines to secure conductors and withstand tension, and are widely used in overhead transmission lines, distribution lines, and fiber optic composite overhead ground wires. Among them, wedge-shaped tension clamps are widely adopted due to their compact structure, strong gripping force, and easy installation. Their working principle involves placing the conductor into the clamping cavity formed by two wedge-shaped cores, then pushing the cores into the wedge-shaped housing, utilizing the self-locking effect generated by the wedge's inclined surface to clamp the conductor securely.

[0003] However, traditional wedge-shaped tension clamps have the following prominent problems in practical use: First, under conditions such as long-term vibration, wind swaying, or temperature changes, relative slippage can easily occur between the clamp core and the shell, leading to a decrease in gripping force or even wire detachment, posing a serious safety hazard; Second, the existing anti-derailment structure of the clamps usually uses a single bolt or pin for locking, which has limited locking force, and multiple locking points need to be adjusted separately during installation, making the operation cumbersome and difficult to ensure uniform locking force at each point; Third, due to the large difference in width between the two ends of the wedge-shaped shell, the existing anti-derailment mechanism cannot adapt to the geometry of the wide end and the narrow end at the same time, which can easily lead to a situation where one end is locked while the other end is loose; Fourth, the lack of an effective synchronous connection mechanism results in uneven force on the left and right clamp cores during installation, affecting the clamping effect.

[0004] Therefore, developing a wedge-shaped tension clamp with multiple anti-derailment locking functions, convenient installation, and synchronous locking has significant practical engineering value. Summary of the Invention

[0005] The present invention aims to provide a wedge-shaped tension clamp with anti-slip locking, which solves the problems of poor anti-slip performance, uneven locking force, and complicated installation of existing wedge-shaped tension clamps.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A wedge-shaped tension clamp with anti-slip locking mechanism includes a wedge-shaped housing, two left and right clamping cores, and an anti-slip locking mechanism. The wedge-shaped housing has a wedge-shaped core cavity inside, into which the two left and right clamping cores are inserted, forming a clamping cavity for clamping the cable. The anti-slip locking mechanism connects the left and right clamping cores and the wedge-shaped housing, achieving anti-slip locking between them.

[0007] The anti-detachment slip lock mechanism includes components such as a slide block, an anti-detachment plate, a triangular plate, a pressure plate bolt, a spring, a pressure plate nut, an anti-detachment screw, a spring, a retaining sleeve, and an anti-detachment nut. The slide block is slidably mounted on the corresponding left and right clamps, and the two are slidably connected by a guide rail. The lower end of the anti-detachment plate is slidably connected to the anti-detachment rail on the top of the wedge-shaped housing, and the anti-detachment rail is set along the wedge direction. One corner of the triangular plate is rotatably mounted on the slide block by the pressure plate bolt, and the pressure plate bolt is screwed onto the slide block. A spring is fitted onto the pressure plate bolt, with its two ends abutting against the slide block and the triangular plate respectively. The pressure plate nut is screwed onto the pressure plate bolt and located on the top of the triangular plate, used to press the triangular plate tight. Two anti-detachment screws are fixedly set on the sides of the other two corners of the triangular plate. A connecting groove is opened on the anti-detachment plate, and the anti-detachment screw is slidably mounted in the connecting groove. Spring 2 is fitted onto the anti-detachment screw, with one end abutting against the triangular plate and the other end abutting against the anti-detachment plate through the retaining sleeve. The anti-detachment nut is screwed onto the anti-detachment screw and located on the other side of the anti-detachment plate, used to lock the anti-detachment plate to the anti-detachment rail.

[0008] Furthermore, the anti-slip locking mechanism has two sets at each end of the left and right clamping cores and the wedge-shaped housing, for a total of four sets, located on both sides of the wide and narrow ends of the wire clamp. The two sets of anti-slip locking mechanisms at the same end are connected to each other via a connecting assembly. The connecting assembly includes connecting rod one and connecting rod two, each hinged at one end and hinged at the other end to one of the two sets of anti-slip locking mechanisms at each end of the housing. Both ends of the two sets of slides at the same end are provided with connecting ears, two of which are connected by connecting bolts, and the other two connecting ears are connected to the corresponding connecting rod one or connecting rod two.

[0009] Because the guide rail and the anti-derailment rail are not parallel, the distance between the anti-derailment plate and the triangular plate at the narrow end of the wedge-shaped housing is smaller than the distance at the wide end. Therefore, the triangular plate is rotatably mounted on the slide block, and its angle is adjusted using pressure plate bolts and pressure plate nuts to accommodate connection requirements at different positions.

[0010] During installation, first connect the slide blocks into a whole using the connecting components, then push the slide blocks to the appropriate position on the guide rail, and then install components such as the triangular plate and anti-loosening plate. Tighten the pressure plate nut and anti-loosening nut in sequence to achieve multiple locking between the left and right clamping cores and the wedge-shaped housing. Through the connecting components and connecting bolts, synchronous locking at both ends and on both sides can be achieved to ensure uniform clamping force. Beneficial effects

[0011] Compared with the prior art, the present invention has the following beneficial effects: Multiple anti-slip locking mechanisms ensure safety and reliability: The combination of slide block, triangular plate, anti-slip plate, anti-slip screw, anti-slip nut and spring assembly forms a multiple locking structure of "triangular plate pressing - anti-slip plate pressing - spring pre-tensioning", which effectively prevents the core from slipping relative to the shell and significantly improves the vibration resistance and anti-loosening ability of the clamp.

[0012] Synchronous locking and uniform force distribution: Connecting rod one, connecting rod two, connecting ears, and connecting bolts link the anti-loosening and slip-locking mechanisms at the same and both ends into one unit. Simply push or pull the connecting rod to achieve synchronous movement of each slide. When tightening the anti-loosening nut, the locking force at each point is applied synchronously, avoiding the skewing and stress concentration caused by point-by-point locking in the traditional method.

[0013] Adaptable to wedge structure and flexible adjustment: The triangular plate is rotatably mounted on the slide and the angle can be adjusted by the pressure plate bolt and pressure plate nut. It can automatically adapt to different gaps at the wide and narrow ends of the wedge-shaped shell, ensuring that the anti-derailment plate and the anti-derailment rail are always well fitted, and the structure is highly adaptable.

[0014] Easy to install and disassemble: The connecting component integrates all anti-slip lock mechanisms into a single module. During installation, simply push the entire module in and tighten a few nuts to complete the locking process. During disassembly, loosen the nuts and pull out the connecting rod to separate the components, significantly improving construction efficiency.

[0015] Spring return for easy maintenance: Spring 1 and Spring 2 provide lifting force for the triangular plate and return force for the anti-detachment plate, respectively. They automatically return to their initial state after the nut is loosened, which facilitates repeated installation and periodic maintenance.

[0016] Simple structure and controllable cost: All parts are machined parts or standard fasteners, with no complex hydraulic or electrical components, resulting in low manufacturing costs and suitability for mass production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 4 ; Figure 5 Three-dimensional structural breakdown of the present invention Figure 1 ; Figure 6 Three-dimensional structural breakdown of the present invention Figure 2 .

[0018] The numbers in the diagram are as follows: 1-Wedge-shaped housing; 2-Left and right clamping cores; 3-Anti-detachment slip lock mechanism; 31-Slide seat; 32-Anti-detachment plate; 33-Triangle plate; 34-Pressure plate bolt; 35-Spring 1; 36-Pressure plate nut; 37-Anti-detachment screw; 38-Spring 2; 39-Abutment sleeve; 40-Anti-detachment nut; 41-Anti-detachment washer; 42-Anti-detachment rail; 43-Guide slide rail; 44-Connecting groove; 5-Connecting assembly; 51-Connecting rod 1; 52-Connecting rod 2; 53-Connecting ear; 54-Connecting bolt. Detailed Implementation

[0019] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. Example

[0020] like Figures 1 to 6 As shown, this embodiment provides an anti-slip locking wedge-shaped tension clamp for tension fixing of steel-cored aluminum stranded wire with a cross-section of 120mm² in overhead transmission lines.

[0021] I. Structural Composition The wire clamp in this embodiment includes: a wedge-shaped housing 1 (made of hot-dip galvanized steel, with a wedge angle of 8°), two left and right clamping cores 2 (made of high-strength aluminum alloy, with anti-slip texture on the surface), four sets of anti-loosening locking mechanisms 3 (each set includes a slide block 31, an anti-loosening plate 32, a triangular plate 33, a pressure plate bolt 34, a spring 1 35, a pressure plate nut 36, two anti-loosening screws 37, a spring 2 38, abutment sleeve 39, an anti-loosening nut 40, and an anti-loosening washer 41), and a connecting assembly 5 (including a connecting rod 1 51, a connecting rod 2 52, a connecting ear 53, and a connecting bolt 54). Anti-loosening rails 42 are provided on both sides of the top of the wedge-shaped housing 1, and guide rails 43 are provided on the sides of the left and right clamping cores 2.

[0022] II. Installation Steps Step 1: Pre-assemble the left and right clamps and slides Place the backs of the two left and right clamping cores 2 together so that the clamping cavities between them are aligned. Insert four slide blocks 31 onto the guide rails 43 at both ends of each left and right clamping core 2, with one slide block 31 at each end of each core. The slide blocks 31 and the guide rails 43 are in a clearance fit (approximately 0.2mm), allowing for smooth sliding without wobbling.

[0023] Step 2: Connect the connection components Take connecting rod 51 and connecting rod 52, and connect one end of them with a hinge bolt so that they can rotate relative to each other. Hinge the free end of connecting rod 51 to the connecting lugs 53 on the two sets of slides 31 at the wide end of the wedge-shaped housing 1; hinge the free end of connecting rod 52 to the connecting lugs 53 on the two sets of slides 31 at the narrow end. At the same time, insert connecting bolts 54 between the other two connecting lugs 53 of the two slides 31 at the same end (wide end) of the housing and pre-tighten them, but do not lock them, to ensure the relative position of the two slides 31. Perform the same operation at the narrow end.

[0024] Step 3: Insert the entire assembly into the wedge-shaped housing. The assembled left and right sandwich cores 2 (with slide base 31 and connecting assembly 5) are inserted into the wedge-shaped core cavity of the wedge-shaped housing 1, so that the wedge-shaped surfaces of the left and right sandwich cores 2 fit against the inner wall of the housing. At this time, the anti-detachment plate 32 and triangular plate 33 have not yet been installed at the anti-detachment plate installation position on the slide base 31, and the slide base 31 can slide along the guide rail 43. Push and pull the connecting rod 1 51 and the connecting rod 2 52 to move the slide base 31 to the appropriate position (approximately the middle position) on the guide rail 43 for subsequent installation of the triangular plate.

[0025] Step 4: Install the triangle plate and spring assembly Place a spring 35 on the top surface of each slide 31. Pass the pressure plate bolt 34 through one corner of the triangular plate 33 and screw it into the threaded hole of the slide 31, so that the triangular plate 33 presses down on the spring 35. Do not tighten the pressure plate nut 36 at this time, allowing the triangular plate 33 to rotate. Pre-screw the two anti-loosening screws 37 into the side threaded holes of the other two corners of the triangular plate 33, and then put on the spring 38 and the abutment sleeve 39.

[0026] Step 5: Install the anti-detachment plate Insert the lower end of the anti-detachment plate 32 into the anti-detachment rail 42 at the top of the wedge-shaped housing 1, allowing the anti-detachment plate 32 to slide along the anti-detachment rail 42. Align the connecting groove 44 on the anti-detachment plate 32 with the two anti-detachment screws 37, so that the anti-detachment screws 37 pass through the connecting groove 44. Place the anti-detachment washer 41 on the protruding end of the anti-detachment screw 37 in sequence, and screw on the anti-detachment nut 40, but do not tighten it yet. At this time, the second spring 38 is in a slightly compressed state, and the abutment sleeve 39 contacts the side of the anti-detachment plate 32.

[0027] Step 6: Adjust the angle of the triangle plate and pre-tighten it. Because the guide rails 43 and anti-detachment rails 42 at the wide and narrow ends of the wedge-shaped housing 1 are spaced differently, the angle of the triangular plate 33 needs to be adjusted. Observe the included angle between the anti-detachment plate 32 and the triangular plate 33 at the wide end, rotate the triangular plate 33 to make it fit naturally, and then tighten the pressure plate nut 36 to make the triangular plate 33 press against the spring 35 and fix it on the slide block 31. The same operation is performed at the narrow end. Note: The distance between the triangular plate 33 and the anti-detachment plate 32 is smaller at the narrow end, and the rotation angle of the triangular plate 33 is relatively larger, but the pressure plate bolt 34 and the connecting groove 44 provide sufficient adjustment margin.

[0028] Step 7: Push the entire assembly into place and lock it in place. By pushing and pulling connecting rod 51 and connecting rod 52, the entire left and right clamping cores 2, along with all the anti-detachment slip lock mechanisms 3, are pushed toward the narrow end of the wedge-shaped housing 1 until the left and right clamping cores 2 are completely wedged into the housing and the wire clamping cavity matches the wire diameter. At this time, the anti-detachment plate 32 slides synchronously along the anti-detachment rail 42 to its final position.

[0029] Step 8: Tighten the anti-loosening nut Use a torque wrench to tighten each anti-loosening nut 40 sequentially (or simultaneously). During tightening, the anti-loosening plate 32 is pulled inward (i.e., towards the center of the housing), and the lower end of the anti-loosening plate 32 generates a huge positive pressure with the inclined surface of the anti-loosening rail 42, thereby firmly locking the left and right clamps 2 to the wedge-shaped housing 1. At the same time, the second spring 38 is further compressed, providing a continuous elastic preload. The connecting bolt 54 is also tightened simultaneously, making the two slides 31 on the same end rigidly connected to each other, preventing relative movement.

[0030] Step 9: Inspection and Adjustment Visually inspect all lock nuts 40 and pressure plate nuts 36 to ensure they are tightened, the wire clamps are secure, and there is no looseness. Use a torque wrench to verify the torque value of the lock nuts 40 (set to 30 N·m in this embodiment). Installation complete.

[0031] III. Working Process and Mechanical Principles When the conductor is under tension, it tends to slip out of the clamping cavity, while the left and right clamping cores 2 tend to withdraw from the wedge-shaped housing 1. At this time, since the anti-detachment nut 40 has locked the anti-detachment plate 32 to the anti-detachment rail 42, the anti-detachment plate 32 cannot move towards the wide end along the anti-detachment rail 42, thus preventing the withdrawal of the left and right clamping cores 2. At the same time, the triangular plate 33 is rigidly connected to the slide block 31 through the pressure plate bolt 34 and the pressure plate nut 36, and the anti-detachment screw 37 connects the triangular plate 33 to the anti-detachment plate 32, forming a closed force transmission chain. When vibration occurs, the first spring 35 and the second spring 38 can absorb some energy and maintain the preload, preventing the threads from loosening. The connecting rod 51 and the second connecting rod 52, as well as the connecting bolt 54, further ensure the synchronization of the four anti-detachment slip lock mechanisms 3, so that even if one end of the clamp is under force, the other end will not slip relative to it.

[0032] IV. Disassembly and Maintenance When disassembly is required, first loosen all anti-detachment nuts 40. Spring 2 38 will automatically spring the anti-detachment plate 32 outward (away from the housing), releasing the anti-detachment plate 32 from the anti-detachment rail 42. Then loosen the connecting bolt 54 and pressure plate nut 36. Spring 1 35 will lift the triangular plate 33. Finally, pull the connecting rod 1 51 and connecting rod 2 52 to pull the left and right clamps 2 out of the wedge-shaped housing 1, allowing you to remove the wires or replace parts.

[0033] V. Effect Verification In this embodiment, grip strength and vibration tests were conducted in the laboratory. Under a tensile force of 150kN, the conductor did not slip; after 1 million cycles of fatigue vibration (amplitude ±1mm, frequency 30Hz), the anti-loosening nut 40 remained firm, and the pressure change within the clamping cavity was less than 5%. Compared with traditional wedge clamps with single-bolt locking, installation time is reduced by approximately 40%, and anti-loosening reliability is improved by an order of magnitude.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A wedge-shaped tension clamp with anti-slip locking mechanism, characterized in that, include: A wedge-shaped shell (1) has a wedge-shaped core cavity inside; Two matching left and right clamps (2) are inserted into the wedge-shaped core cavity, and a clamping cavity for clamping the cable is formed between the two left and right clamps (2); Anti-slip lock mechanism (3) connects the left and right clamps (2) and the wedge-shaped housing (1) to achieve anti-slip locking between the two; The anti-slip lock mechanism (3) includes: The slide (31) is slidably mounted on the corresponding left and right clamps (2), and is slidably connected to the left and right clamps (2) via guide rails (43); The lower end of the anti-detachment plate (32) is slidably connected to the top of the wedge-shaped housing (1) via the anti-detachment rail (42); A triangular plate (33) is rotatably mounted on the slide block (31) by a pressure plate bolt (34), and the pressure plate bolt (34) is screwed onto the slide block (31). Spring 1 (35) is sleeved on the pressure plate bolt (34) and its two ends abut against the slide (31) and the triangular plate (33) respectively. The pressure plate nut (36) is screwed onto the pressure plate bolt (34) and located on the top of the triangular plate (33) to press the triangular plate (33) against the slide (31). Two anti-detachment screws (37) are fixedly installed on the sides of the other two corners of the triangular plate (33); The anti-detachment plate (32) is provided with a connecting groove (44), and the anti-detachment screw (37) is slidably installed in the connecting groove (44); Spring 2 (38) is sleeved on the anti-detachment screw (37), with one end abutting against the triangular plate (33) and the other end abutting against the anti-detachment plate (32) through the abutment sleeve (39); The anti-detachment nut (40) is screwed onto the anti-detachment screw (37) and located on the other side of the anti-detachment plate (32) to lock the anti-detachment plate (32) onto the anti-detachment rail (42).

2. The anti-slip locking wedge-shaped tension clamp according to claim 1, characterized in that, The anti-slip lock mechanism (3) is provided with two sets at each end of the left and right clamps (2) and the wedge-shaped shell (1), that is, a total of four sets.

3. The anti-slip locking wedge-shaped tension clamp according to claim 1, characterized in that, The anti-derailment rails (42) are located on the top two sides of the wedge-shaped housing (1), and the anti-derailment rails (42) on both sides are also wedge-shaped and have the same wedge-shaped direction as the wedge-shaped core cavity.

4. The anti-slip locking wedge-shaped tension clamp according to claim 1, characterized in that, The abutment sleeve (39) is fitted onto the corresponding anti-detachment screw (37), and the diameter of the abutment sleeve (39) is greater than the width of the connecting groove (44).

5. The anti-slip locking wedge-shaped tension clamp according to claim 1, characterized in that, An anti-loosening washer (41) is provided between the anti-loosening nut (40) and the anti-loosening plate (32).

6. The anti-slip locking wedge-shaped tension clamp according to claim 1, characterized in that, The two sets of anti-slip lock mechanisms (3) located at the same end of the left and right clamps (2) and the wedge-shaped housing (1) are connected to each other by a connecting component (5).

7. The anti-slip locking wedge-shaped tension clamp according to claim 6, characterized in that, The connecting assembly (5) includes a connecting rod one (51) and a connecting rod two (52). One end of the connecting rod one (51) is hinged to one end of the connecting rod two (52) by bolts. The other end of the connecting rod one (51) is hinged to two sets of anti-slip locking mechanisms (3) at one end of the wedge-shaped housing (1). The other end of the connecting rod two (52) is hinged to two sets of anti-slip locking mechanisms (3) at the other end of the wedge-shaped housing (1).

8. The anti-slip locking wedge-shaped tension clamp according to claim 7, characterized in that, Two sets of anti-detachment slip lock mechanisms (3) located at the same end of the wedge-shaped housing (1) are provided with connecting ears (53) at both ends of the two slides (31). Two of the connecting ears (53) at the same end are connected by connecting bolts (54), and the other two connecting ears (53) are connected to one end of the corresponding connecting rod one (51) or connecting rod two (52).

9. The anti-slip locking wedge-shaped tension clamp according to claim 1, characterized in that, The guide rail (43) is not parallel to the anti-detachment rail (42), so that the distance between the anti-detachment plate (32) and the triangular plate (33) at the narrow end of the wedge-shaped housing (1) is smaller than the distance at the wide end.

10. A wedge-shaped tension clamp with anti-slip locking mechanism according to claim 1, characterized in that, By tightening the anti-loosening nut (40), the anti-loosening plate (32) is pressed against the anti-loosening rail (42), and at the same time, the triangular plate (33) and the slide (31) are pressed together by the spring (35) and the pressure plate nut (36), forming a multi-locking structure.

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