A cable tightener based on torque locking

Abstract

The application relates to the technical field of cable installation, and discloses a cable tightener based on torque locking, which comprises a base plate, a hook piece, an adjusting assembly, an elastic pre-tightening piece and a protective sleeve, wherein the adjusting assembly comprises an adjusting block and a movable contact pad, and the adjusting block is slidingly installed in a sliding groove of the base plate. The tightener is connected with the center rod of an insulator through the hook piece, the cable body is fixed on the surface of the insulator, the tightener is more convenient and faster to disassemble and assemble, the adjusting block is provided with one-way sliding in the base plate, the adjusting block moves along with the cable body when the cable body is pulled and tensioned, the function of conveniently adjusting the cable tension is achieved, the distance between the adjusting block and the insulator is reduced during the cable tensioning process, the cable body is more firmly constrained by the tightener, and the cable body is not prone to falling off, so that the problems of inconvenient cable tensioning and inconvenient installation of the existing tightener are solved.

Description

Technical Field

[0001] This invention relates to the field of cable installation technology, and in particular to a cable tensioner based on torque locking. Background Technology

[0002] During cable installation, cables need to be secured to insulators by binding. Traditional hand-binding wires are prone to rust and breakage, have a short lifespan (requiring replacement every 3-5 years), and incur high maintenance costs. Existing technology, patent document CN209516568U, discloses a tensioner for pin insulators, comprising a pressure plate, an upper clamping plate, and a lower clamping plate. One end of each plate is hinged by a first screw, and the other end has a first through hole, a second through hole, and a third through hole for a second screw to pass through. The pressure plate can reciprocate along the first and second screws. The upper and lower clamping plates have opposing first and second arc-shaped structures that cooperate to form a retaining ring for engaging the annular side groove of the pin insulator. The pressure plate is located above the pin insulator. The first and second screws each have corresponding locking nuts. Tightening the locking nuts allows the pressure plate to move towards the upper and lower clamping plates, thereby pressing the cable firmly against the top groove of the pin insulator. This type of cable tensioner can replace the method of binding with wire to fix the cable to the pin insulator. It has a simple structure, is convenient and quick to use, and provides a secure fixation.

[0003] During construction, the cable is pressed against the insulator by tightening the nuts on the tensioner. There are many such tensioners along the cable laying direction. When tensioning and adjusting the cable tension at the end of the cable, due to the constraints of the tensioners at each node, it is necessary to first loosen the locking nuts of each node, then tighten the cable, and then tighten them one by one. This is a huge amount of work. Therefore, the existing tensioners have the problems of inconvenience in cable tensioning and inconvenient installation, which urgently need to be solved. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of inconvenience in cable tensioning and installation of existing cable tensioners, and to propose a cable tensioner based on torque locking.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cable tensioner based on torque locking, comprising: a base plate, the base plate having a U-shaped structure, and a groove formed on the inner wall of the U-shaped opening of the base plate;

[0006] Two hooks are symmetrically fixed on both sides of the base plate. The hooks are used to hang on the central rod of the insulator and can rotate around the surface of the central rod of the insulator.

[0007] The adjustment assembly includes an adjustment block and a movable contact pad. The adjustment block is slidably installed in the slide groove, and the movable contact pad is fixedly installed on the side of the adjustment block near the insulator. A limit mechanism is provided inside the adjustment block, and a one-way slot matching the limit mechanism is provided in the slide groove. Through the constraint of the limit mechanism and the one-way slot, the adjustment block is allowed to move in one direction and prevented from moving in the opposite direction.

[0008] The elastic preload element is mounted on the base plate and provides elastic preload force to the adjusting block.

[0009] This tensioner connects to the center rod of the insulator via a hook, fixing the cable body to the surface of the insulator. This makes the tensioner easier and faster to install and remove. When tensioning the cable body, the adjusting block moves with the cable body, allowing for easy adjustment of the cable tension.

[0010] Preferably, the limiting mechanism includes an elastic metal sheet with a V-shaped structure. A groove is formed on the surface of the adjusting block. One end of the elastic metal sheet is fixedly connected to the inside of the groove, and the other end of the elastic metal sheet extends to the outside of the groove. The unidirectional slot is a triangular toothed groove with equal pitch set along the length of the slide groove. The end of the elastic metal sheet can extend into the triangular toothed groove, allowing the adjusting block to move in one direction and preventing the adjusting block from moving in the opposite direction, thus preventing the adjusting block from moving in the opposite direction.

[0011] Preferably, the limiting mechanism further includes a toggle block, a connecting rod is slidably installed inside the adjusting block, the toggle block is fixedly connected to the end of the connecting rod, a support spring is provided inside the adjusting block, the support spring presses against the toggle block, and a trigger plate is fixedly installed at the end of the toggle block. When the toggle block compresses the support spring, the trigger plate presses against the elastic metal plate, causing the end of the elastic metal plate to separate from the one-way slot. After pressing the toggle block, the position of the adjusting block can be slid freely, making the installation and disassembly of the tensioner more convenient.

[0012] Preferably, the elastic pretensioner includes a cylinder and a telescopic rod. The cylinder is fixedly installed on the side of the base plate away from the U-shaped opening, and the telescopic rod is slidably installed in the cylinder. The end of the telescopic rod extends into the groove and is fixedly connected to the adjusting block. A return spring that abuts against the telescopic rod is provided inside the cylinder.

[0013] Under the action of the reset spring, the adjusting block moves away from the cylinder and the force exerted on the adjusting block by the tensioned cable body is F. The direction of F is perpendicular to the axis of the cable body. Under the action of the force F, the rotation arm LX of the base plate gradually decreases. When its torque decreases to zero, it means that the rotation effect of the force on the base plate disappears and the base plate is in a torque balance state, making the installation of the tensioner more reliable.

[0014] Preferably, the movable contact pad is detachably fixed to the adjusting block by screws. Different movable contact pads and adjusting blocks are selected and assembled according to different diameters of the cable body. A fixed contact pad is detachably fixed to the side of the base plate near the insulator by screws. Different fixed contact pads are selected and assembled with the base plate according to different diameters of the cable body to meet different installation requirements and improve its applicability.

[0015] Preferably, the cable tensioner further includes a protective sleeve, which is snapped onto the surface of the substrate to increase its protective properties. The protective sleeve is designed in different colors or has added symbols to distinguish different cable functions.

[0016] The present invention has the following beneficial effects:

[0017] 1. The tensioner proposed in this invention connects to the center rod of the insulator via a hook, fixing the cable body to the surface of the insulator. This makes the tensioner easier and faster to install and remove. Because the base plate is equipped with a one-way sliding adjustment block, the adjustment block moves with the cable body when the cable body is tensioned, which facilitates the adjustment of the cable tension. Moreover, during the tensioning process, the distance between the adjustment block and the insulator decreases, making the tensioner more secure in its constraint on the cable body and less likely to fall off.

[0018] 2. The tensioner proposed in this invention has a base plate that can rotate around the central rod of the insulator. When the base plate is parallel to the axis of the cable body, the adjusting block moves away from the cylinder under the action of the return spring. The force exerted by the cable body on the adjusting block under tension is F, and the direction of F is perpendicular to the axis of the cable body. Under the action of the force F, the rotation arm LX of the base plate gradually decreases. When its torque decreases to zero, it means that the rotation effect of the force on the base plate disappears and the base plate is in a torque balance state, making the installation of the tensioner more reliable.

[0019] Existing technologies mostly fix cables by tightening bolts / nuts. Compared with existing technologies, this cable tensioner will not cause the phenomenon of over-tightening bolts / nuts and bursting insulators, making the installation operation safer and less labor-intensive.

[0020] 3. The tensioner proposed in this invention, when the center line of the base plate and the cable body is not parallel, under the action of the return spring, the adjusting block presses against the surface of the cable body and provides the cable body with a traction force in the same direction as the movement of the adjusting block, thereby assisting in tensioning the cable body. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the tensioner proposed in this invention.

[0022] Figure 2This is a three-dimensional structural diagram of the tensioner proposed in this invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the adjustment block proposed in this invention;

[0024] Figure 4 This is a top-section schematic diagram of the tensioner proposed in this invention;

[0025] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point H;

[0026] Figure 6 This is a schematic diagram of the installation state of the tensioner proposed in this invention. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the installation state of the tensioner proposed in this invention. Figure 2 ;

[0028] Figure 8 This is a schematic diagram of the installation process of the tensioner proposed in this invention.

[0029] In the diagram: 1. Base plate, 2. Hook, 3. Insulator, 4. Adjusting block, 5. Movable contact pad, 6. One-way slot, 7. Elastic metal sheet, 8. Toggle block, 9. Connecting rod, 10. Support spring, 11. Trigger plate, 12. Cylinder, 13. Telescopic rod, 14. Return spring, 15. Cable body, 16. Fixed contact pad, 17. Protective sleeve. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Reference Figure 1 A cable tensioner based on torque locking includes: a base plate 1, a hook 2, an adjustment assembly, an elastic pre-tightening member, and a protective sleeve 17;

[0033] Among them, the substrate 1 has a U-shaped structure, and the inner wall of the U-shaped opening of the substrate 1 is provided with a sliding groove. The protective sleeve 17 can be snapped onto the surface of the substrate 1.

[0034] Among them, two hooks 2 are symmetrically fixedly installed on both sides of the base plate 1. An insulator 3 is provided on the street code. The hooks 2 are used to hang on the central rod of the insulator 3, and the hooks 2 can rotate around the surface of the central rod of the insulator 3.

[0035] Among them, the adjustment component, reference Figure 2 , Figure 3 The adjustment assembly includes an adjustment block 4 and a movable contact pad 5. The adjustment block 4 is slidably installed in the slide groove, and the movable contact pad 5 is fixedly installed on the side of the adjustment block 4 near the insulator 3. A limit mechanism is provided inside the adjustment block 4, and a one-way slot 6 matching the limit mechanism is provided in the slide groove. Through the constraint of the limit mechanism and the one-way slot 6, the adjustment block 4 is allowed to move in one direction and prevented from moving in the opposite direction.

[0036] Specifically, the limiting mechanism includes an elastic metal sheet 7, such as Figure 3 As shown, the elastic metal sheet 7 has a V-shaped structure, and the surface of the adjusting block 4 has a groove. One end of the elastic metal sheet 7 is fixedly connected to the inside of the groove, and the other end of the elastic metal sheet 7 extends to the outside of the groove.

[0037] like Figure 4 , Figure 5 As shown, the one-way slot 6 is a triangular toothed groove with equal pitch set along the length of the slide groove, and the end of the elastic metal piece 7 can extend into the triangular toothed groove.

[0038] The limiting mechanism also includes a toggle block 8. A connecting rod 9 is slidably installed inside the adjusting block 4. The toggle block 8 is fixedly connected to the end of the connecting rod 9. A support spring 10 is provided inside the adjusting block 4. The support spring 10 presses against the toggle block 8. A trigger plate 11 is fixedly installed at the end of the toggle block 8. When the toggle block 8 compresses the support spring 10, the trigger plate 11 presses against the elastic metal plate 7, causing the end of the elastic metal plate 7 to separate from the one-way slot 6.

[0039] Among them, the elastic preload element is mounted on the base plate 1 and provides elastic preload force to the adjusting block 4. (Refer to...) Figure 4 The elastic pretensioning component includes a cylinder 12 and a telescopic rod 13. The cylinder 12 is fixedly installed on the side of the base plate 1 away from the U-shaped opening. The telescopic rod 13 is slidably installed inside the cylinder 12. The end of the telescopic rod 13 extends into the groove and is fixedly connected to the adjusting block 4. A return spring 14 is provided inside the cylinder 12 to press against the telescopic rod 13.

[0040] In this embodiment, the movable contact pad 5 is detachably fixed to the adjusting block 4 by screws. Different movable contact pads 5 and adjusting blocks 4 are selected and assembled according to the different diameters of the cable body 15. The fixed contact pad 16 is detachably fixed to the side of the base plate 1 near the insulator 3 by screws. Different fixed contact pads 16 are selected and assembled with the base plate 1 according to the different diameters of the cable body 15.

[0041] The installation method of this tensioner is as follows: Hold the base plate 1 and press the adjusting block 4, as shown. Figure 2 As shown, L0 decreases, and the tensioner is hung at an angle on the central rod of insulator 3, as shown. Figure 8 As shown in Figures a and b, when the pressure on the adjusting block 4 is released, under the action of the return spring 14, the adjusting block 4 presses against the surface of the cable body 15, as shown in Figures a and b. Figure 8 As shown in Figure c, because the end of the elastic metal sheet 7 is engaged in the one-way slot 6, preventing the adjusting block 4 from moving in the opposite direction, the substrate 1 is finally rotated to be parallel to the cable body 15, as shown in Figure c. Figure 8 As shown in Figure c; this process, Figure 8 In Figures a, b, and c, the distances between the movable contact pad 5 and the center rod of the insulator 3 are L1, L2, and L3, respectively, with L1 > L2 > L3. This allows the movable contact pad 5 and the insulator 3 to be tightly held against the surface of the cable body 15. The cable body 15 is fixed to the surface of the insulator 3 by hooking the hook piece 2 to the center rod of the insulator 3, eliminating the need for tightening bolts / nuts and making the installation and removal of the tensioner more convenient and quick.

[0042] Cable tensioning method: Before tensioning, such as... Figure 6 As shown, the A and B ends of the cable body 15 are relaxed and can sway. The base plate 1 can rotate around the central rod of the insulator 3 as an axis. Figure 8 As shown in Figure c, the movable contact pad 5 gently presses against the surface of the cable body 15, and the B end of the cable body 15 is manually pulled to pre-tension it. After the cable has been laid for a certain distance, the cable is finally tensioned using a tensioning device. Figure 7 As shown, the adjusting block 4 in each tensioner in a certain section moves to the right along with the cable body 15, and the distance between the adjusting block 4 and the insulator 3 decreases, thus tightening the cable body 15.

[0043] The rotation axis of the hook 2 is coaxial with the central rod of the insulator 3. The base plate 1 can rotate relative to the insulator 3 within the first angle range α. When α≈0, the adjusting block 4 moves away from the cylinder 12 along the slide groove under the action of the return spring 14 and maintains surface contact with the cable body 15. The base plate 1 is in a stable position relative to the insulator 3.

[0044] Depending on the tensioning distance, substrate 1 is in two states. In the first state, substrate 1 is not parallel to the axis of the cable body 15, i.e., α≠0. Figure 8 As shown in Figure c, under the action of the return spring 14, the adjusting block 4 presses against the surface of the cable body 15 and provides the cable body 15 with a traction force in the same direction as the movement of the adjusting block 4, thereby assisting in tensioning the cable body 15.

[0045] In the second state, the centerline of the substrate 1 is parallel to that of the cable body 15, i.e., α=0, as shown below. Figure 7 As shown, under the action of the return spring 14, the adjusting block 4 moves away from the cylinder 12. The force exerted on the adjusting block 4 by the tensioned cable body 15 is F. The direction of F is perpendicular to the axis of the cable body 15. Under the action of the force F, the rotation arm LX of the base plate 1 gradually decreases. The torque of F on the center rod of the insulator 3 is F×LX. When the torque decreases to zero, it means that the rotation effect of the force on the base plate 1 disappears and the base plate 1 is in a torque balance state.

[0046] Both states of the substrate 1 have a constraining effect on the cable. During the installation of this tensioner, the force F will not increase indefinitely due to improper installation. Existing technologies mostly fix the cable by tightening bolts / nuts. Compared with existing technologies, this tensioner will not cause the phenomenon of over-tightening the bolts / nuts and bursting the insulator 3, making the installation operation safer and less labor-intensive.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A cable tensioner based on torque locking, characterized in that, include: The substrate (1) has a U-shaped structure and a groove is provided on the inner wall of the U-shaped opening of the substrate (1). Hook (2), two hooks (2) are symmetrically fixed on both sides of the base plate (1). The hooks (2) are used to hang on the central rod of the insulator (3), and the hooks (2) can rotate around the surface of the central rod of the insulator (3). The adjustment assembly includes an adjustment block (4) and a movable contact pad (5). The adjustment block (4) is slidably installed in the groove, and the movable contact pad (5) is fixedly installed on the side of the adjustment block (4) near the insulator (3). A limit mechanism is provided inside the adjustment block (4), and a one-way slot (6) matching the limit mechanism is provided in the groove. Through the constraint of the limit mechanism and the one-way slot (6), the adjustment block (4) is allowed to move in one direction and prevented from moving in the opposite direction. An elastic preload is mounted on the base plate (1) to provide elastic preload force to the adjusting block (4); The elastic pretensioner includes a cylinder (12) and a telescopic rod (13). The cylinder (12) is fixedly installed on the side of the base plate (1) away from the U-shaped opening. The telescopic rod (13) is slidably installed inside the cylinder (12). The end of the telescopic rod (13) extends into the groove and is fixedly connected to the adjusting block (4). A return spring (14) is provided inside the cylinder (12) to press against the telescopic rod (13). The rotation axis of the hook (2) is coaxial with the center rod of the insulator (3). The base plate (1) can rotate relative to the insulator (3) within a first angle range α. When α≈0, the adjusting block (4) moves away from the cylinder (12) along the slide groove under the action of the reset spring (14) and maintains surface contact with the cable body (15). The base plate (1) is in a stable position relative to the insulator (3).

2. The cable tensioner based on torque locking according to claim 1, characterized in that: The limiting mechanism includes an elastic metal sheet (7), which has a V-shaped structure. The surface of the adjusting block (4) has a groove. One end of the elastic metal sheet (7) is fixedly connected to the inside of the groove, and the other end of the elastic metal sheet (7) extends to the outside of the groove.

3. A cable tensioner based on torque locking according to claim 2, characterized in that: The unidirectional slot (6) is a triangular toothed groove with equal pitch set along the length of the groove, and the end of the elastic metal sheet (7) can extend into the triangular toothed groove.

4. A cable tensioner based on torque locking according to claim 3, characterized in that: The limiting mechanism also includes a toggle block (8), a connecting rod (9) is slidably installed inside the adjusting block (4), the toggle block (8) is fixedly connected to the end of the connecting rod (9), a support spring (10) is provided inside the adjusting block (4), the support spring (10) abuts against the toggle block (8), a trigger piece (11) is fixedly installed at the end of the toggle block (8), when the toggle block (8) compresses the support spring (10), the trigger piece (11) presses against the elastic metal piece (7), so that the end of the elastic metal piece (7) separates from the one-way slot (6).

5. A cable tensioner based on torque locking according to claim 1, characterized in that: The movable contact pad (5) is detachably fixed to the adjusting block (4) by screws. Different movable contact pads (5) and adjusting blocks (4) are selected to be assembled according to the different diameters of the cable body (15).

6. A cable tensioner based on torque locking according to claim 1, characterized in that: The substrate (1) is fixedly mounted with a fixing contact pad (16) on the side near the insulator (3) by screws. Different fixing contact pads (16) are selected and assembled with the substrate (1) according to the different diameters of the cable body (15).

7. A cable tensioner based on torque locking according to any one of claims 1-6, characterized in that: The cable tensioner also includes a protective sleeve (17), which is snapped onto the surface of the base plate (1).

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