A low voltage cable intermittent tensioning device

Abstract

The present invention discloses an intermittent tensioning device for low-voltage cables, which belongs to the field of cable erection, and comprises a tensioning tool, wherein a clamp is provided at one end of the tensioning tool, wherein the tensioning tool comprises a base, a wire fixing component fixedly installed at one end of the base, and a wire pulling component slidably installed at the other end of the base, wherein the wire fixing component and the wire pulling component both comprise a T-shaped seat, wherein both sides of the T-shaped seat are rotatably connected with a plurality of mutually parallel rotating arms, wherein the upper ends of the plurality of rotating arms are pivotally connected with a linkage rod, wherein the lower ends of the rotating arms are provided with a wire clamping head, wherein the upper ends of the rotating arms at the front end are pivotally connected with a connecting rod, wherein the other end of the connecting rod is slidably installed in a guide groove and is externally pivotally connected with a sliding arm; wherein an elastic structure is provided at the lower part of the wire fixing component, and a second telescopic mechanism is fixedly connected at the upper part of the base. The wire fixing component and the wire pulling component of the present invention act alternately, thereby realizing the intermittent tensioning operation of the cable, and furthermore, the design of the T-shaped seat enables multiple groups of cables to be tensioned simultaneously during the tensioning operation, thereby improving the efficiency of the cable tensioning.

Description

Technical Field

[0001] The invention belongs to the field of cable erection, and in particular relates to an intermittent tightening device for a low-voltage cable. Background Art

[0002] In the construction of power transmission and distribution systems, the installation and tightening of low-voltage cables is a crucial link, and its quality is directly related to the stability and safety of the power system. Traditionally, this operation process is highly dependent on manual operation, especially when using a tensioner to tighten the cable, which faces many technical challenges and efficiency bottlenecks.

[0003] The existing low-voltage cable tightening operation generally uses a manual tensioner as the core tool. Its working principle is: manually fix the traction rope at one end of the tensioner to the pole, and then fix the tension clamp at the other end to the cable. By manually turning the ratchet handle, the traction rope is wound and generates tension, and then the tension is transmitted to the cable through the tension clamp to achieve gradual tensioning of the cable. However, in actual application, this tensioning method exposes a series of significant problems:

[0004] 1. The problem of the position fixity of the tension clamp: Once the tension clamp is installed and fixed on the cable, its position is difficult to adjust. Due to the limitations of the working environment, the tension clamp is often installed close to the cable tower, which results in the cable tension still not meeting the design requirements after the traction rope is fully tightened. In order to make up for this shortcoming, the operator has to frequently disassemble and reinstall the tension clamp and adjust its position for multiple tensioning operations, which greatly reduces the working efficiency.

[0005] 2. Poor operational flexibility: The working principle of the cable tensioner determines that its operation process is relatively mechanical and lacks flexibility. During the cable tensioning process, it is impossible to adjust the position of the cable tensioner or the tension in real time according to the actual tension of the cable, making the entire operation process dependent on the experience and judgment of the operator, increasing the difficulty and uncertainty of the operation.

[0006] 3. High physical exertion and potential safety hazards: Multiple removal and installation of tensioning clamps and tensioning operations require extremely high physical strength from the operators, especially in high-altitude working environments. Long-term and high-intensity work not only increases the physical burden on the operators, but may also lead to operational errors or safety accidents, seriously threatening the lives of the operators. Summary of the invention

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an intermittent tensioning device for a low-voltage cable to perform continuous tensioning operations on the cable, thereby solving the problem that the cable tensioning requirements cannot be met after the existing tensioner traction rope is fully tightened, avoiding multiple clamping of the tensioning clamp and improving the efficiency of the low-voltage cable installation.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A low-voltage cable intermittent tensioning device, comprising a tensioning tool, one end of the tensioning tool is provided with a clamp, the clamp comprises two semicircular clamp bodies, both ends of the clamp bodies are provided with connecting lugs; the tensioning tool comprises a base, a wire fixing component fixedly mounted on one end of the base and a wire pulling component slidably mounted on the other end of the base, the wire fixing component and the wire pulling component both comprise a T-shaped seat, one end of the T-shaped seat is provided with a guide groove, both sides of the T-shaped seat are rotatably connected with a plurality of mutually parallel rotating arms, the upper ends of the plurality of rotating arms are pivotally connected with a linkage rod, the lower end of the rotating arm is provided with a wire clamping head, and the rotating arm at the front end A connecting rod is pivoted at the upper end, and the other end of the connecting rod is slidably installed in the guide groove and is pivoted to a sliding arm on the outside; a first strip groove and a second strip groove are provided on the base, the sliding arm of the wire fixing assembly is slidably installed in the first strip groove, and the sliding arm of the wire pulling assembly is slidably installed in the second strip groove; guide rails are provided on both sides of the second strip groove, and a sliding block is provided at the lower part of the T-shaped seat of the wire pulling assembly, and the sliding block is slidably installed in the guide rails; an elastic structure is provided at the lower part of the wire fixing assembly, and a second telescopic mechanism is fixedly connected to the upper part of the base, and one end of the second telescopic mechanism is connected to the sliding arm of the wire pulling assembly.

[0010] Furthermore, a clamping groove is provided in the middle of the clamping hoop, a clamping block is slidably connected in the clamping groove, and one end of the base is connected to the clamping block.

[0011] Furthermore, a support frame is hinged at the lower part of the base, and an arc-shaped wall panel is pivoted at the lower end of the support frame. Anti-slip rubber is provided on the inner wall of the arc-shaped wall panel, and the arc-shaped wall panel rests on the outer wall of the pole to support the base; one end of the base is pivoted to the block.

[0012] Furthermore, arc-shaped wire grooves are provided on both sides of the T-shaped seat, anti-slip grooves are provided in the arc-shaped wire grooves, and the cables are placed in the arc-shaped wire grooves.

[0013] Furthermore, fixing pins are symmetrically connected on both sides of the T-shaped seat, and one end of the fixing pin is movably connected to a wire baffle plate, and the lower end of the wire baffle plate is a free end. When used for wire tightening operations, the wire baffle plate is rotated upward and the cables are placed on both sides of the T-shaped seat. After placement, the wire baffle plate is released and falls freely to close the openings on both sides of the T-shaped seat.

[0014] Furthermore, two sets of support arms are provided at one end of the base, a wire passing wheel is provided on the upper part of the support arm, the cable is placed on the upper part of the wire passing wheel, and a detachable wire blocking rod is provided on the upper part of the wire passing wheel.

[0015] Furthermore, clamping strips are provided on both sides of the lower part of the second strip groove, and a sliding seat is provided at the lower part of the base. Both sides of the sliding seat are slidably installed in the clamping strips. One end of the sliding seat is fixedly connected to the sliding arm of the wire pulling assembly. A third strip groove is provided in the middle of the sliding seat. Slide grooves are symmetrically provided on both sides of the sliding seat. The slide grooves include a lower horizontal groove, an upper horizontal groove and an inclined groove connecting the lower horizontal groove and the upper horizontal groove. A through hole is provided in the middle of the base. A push rod is gap connected to the inside of the third strip groove. The upper end of the push rod is gap installed in the through hole. Pin shafts are provided on both sides of the push rod. The pin shaft is slidably installed in the inside of the slide groove. When the wire pulling assembly and the cable are loosened, the pin shaft is located in the upper horizontal groove, and the upper end of the push rod is pressed tightly against the lower surface of the T-shaped seat.

[0016] Furthermore, the outer thread of the push rod is connected with a threaded sleeve, the threaded sleeve is installed in the through hole with a gap, and the pin shaft is fixedly installed on both sides of the threaded sleeve.

[0017] Furthermore, the tensioning structure includes a first telescopic mechanism, and the first telescopic mechanism and the second telescopic mechanism include a cylinder, a hydraulic cylinder or an electric push rod; one end of the first telescopic mechanism is fixedly connected to the sliding arm of the wire fixing component, and when the wire pulling component operates to tighten the wire to the right, the first telescopic mechanism contracts, driving the sliding arm of the wire fixing component to move to the left end of the first strip groove, so that the rotating arm of the wire fixing component is loosened from the cable; when the wire pulling assembly returns to the left, the first telescopic mechanism extends, driving the sliding arm of the wire fixing component to move to the right end of the first strip groove, so that the rotating arm of the wire fixing component clamps the cable.

[0018] Furthermore, the tensioning structure includes a gear rotatably mounted on the lower part of the base, a first rack meshing on one side of the gear, and a second rack meshing on the other side of the gear, one end of the first rack is fixedly connected to the sliding seat, and one end of the second rack is fixedly connected to the sliding arm of the fixing component, and the number of teeth of the second rack is less than the number of teeth of the first rack; when the wire pulling assembly is operating to tighten the wire to the right, in the process of the wire pulling assembly clamping the cable, the first rack moves to the right to drive the gear to rotate, and the gear drives the second rack and the sliding arm to move to the left. As the cable is clamped by the wire pulling assembly, the wire fixing assembly gradually loosens the cable. When the cable is completely clamped by the wire pulling assembly, the teeth of the second rack are all located on the left side of the gear. When the wire pulling assembly continues to tighten the wire to the right, the second rack no longer moves to the left, so that the rotating arm and the cable remain in a loosened state; when the wire pulling assembly returns to the left, the first rack moves to the left to drive the gear to rotate in the opposite direction. At this time, the gear and the second rack are instantly meshed and drive the second rack to move to the right, so that the rotating arm of the wire fixing assembly clamps the cable in time.

[0019] The beneficial effects of the present invention are:

[0020] 1) The wire fixing assembly and the wire pulling assembly of the present invention act alternately to realize intermittent cable tightening operation. In addition, the design of the T-shaped seat enables multiple groups of cables to be tightened simultaneously during the tightening operation, thereby improving the efficiency of cable tightening.

[0021] 2) A card slot is provided on the clamp, and a card block is provided in the card slot. One end of the base is connected to the card block, which facilitates the adjustment of the angle of the tensioning tool on the pole, further improving the flexibility of the use of the tensioning device.

[0022] 3) A support frame for supporting the base is provided at the lower part of the base, and an arc-shaped wall panel with anti-slip rubber is provided at the lower end of the support frame to enhance the stability of the base. In addition, in this solution, one end of the base is pivotally connected to the card block to facilitate adjustment of the inclination angle of the base according to the initial tightness of the cable, thereby ensuring smoothness when the cable is tightened.

[0023] 4) Arc-shaped wire grooves are set on both sides of the T-shaped seat, and anti-slip grooves are set in the arc-shaped wire grooves, which increases the contact area between the T-shaped seat and the cable and ensures the stability of the wire fixing component or the wire pulling component when clamping the cable.

[0024] 5) Wire baffles are set on both sides of the T-seat. When the cable is tightened, the wire baffles close the openings on both sides of the T-seat to prevent the cables from falling off from both sides of the T-seat during the tightening operation.

[0025] 6) A support arm is provided at one end of the base, and a wire wheel is provided on the support arm to ensure the smoothness of the cable tightening operation. In addition, a wire blocking rod is provided on the upper part of the wire wheel to prevent the cable from falling off the support arm during the tightening operation.

[0026] 7) A sliding seat is arranged at the lower part of the base, slide grooves are arranged on both sides of the sliding seat, and a push rod is installed inside the sliding seat. The push rod realizes the tightening and loosening of the T-seat of the wire pulling assembly under the joint operation of the through hole, the pin shaft and the slide groove, thereby reducing manual intervention, alleviating the labor intensity of the operators, and improving the efficiency of the operation.

[0027] 8) The external thread of the push rod is connected with a threaded sleeve, and the threaded sleeve is installed in the through hole with clearance, so as to facilitate the adjustment of the tightening force between the push rod and the bottom of the T-seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a diagram showing the use status of an intermittent tensioning device for a low-voltage cable.

[0029] Figure 2 It is a schematic diagram of a clamp in a low-voltage cable intermittent tightening device of the present invention.

[0030] Figure 3The present invention is a schematic diagram of the assembly of a wire fixing component and a wire pulling component in an intermittent wire tightening device for a low-voltage cable.

[0031] Figure 4 It is a schematic diagram of a base in a low-voltage cable intermittent tightening device of the present invention.

[0032] Figure 5 The present invention is a bottom view of a base of an intermittent tensioning device for a low-voltage cable.

[0033] Figure 6 The present invention is a schematic diagram of an embodiment of a wire clamping structure in an intermittent wire tightening device for a low-voltage cable.

[0034] Figure 7 It is a schematic diagram of a wire pulling assembly in an intermittent wire tightening device for a low-voltage cable of the present invention.

[0035] Figure 8 It is a schematic diagram of a sliding seat in an intermittent tensioning device for a low-voltage cable according to the present invention.

[0036] Fig. 9 It is a schematic diagram of another embodiment of a wire clamping structure in an intermittent wire tightening device for a low-voltage cable of the present invention.

[0037] Fig.10 The invention discloses a schematic diagram of the connection between a wire clamping structure and a sliding seat in an intermittent wire tightening device for a low-voltage cable.

[0038] Fig.11 It is a schematic diagram of a support frame in a low-voltage cable intermittent tightening device of the present invention.

[0039] In the figure, 1, electric pole; 2, clamp; 21, clamp body; 22, connecting lug; 23, clamping groove; 24, clamping block; 3, line tightening tool; 31, base; 311, first strip groove; 312, second strip groove; 313, guide rail; 314, through hole; 315, clamping strip; 32, line fixing assembly; 321, T-type seat; 3211, guide groove; 3212, arc-shaped line groove; 322, rotating arm; 323, clamping head; 324, linkage rod; 325, connecting rod; 326, sliding arm; 327, first telescopic mechanism; 328, fixing pin; 329, wire blocking plate; 33, wire pulling assembly; 331, slider; 332, sliding seat; 3321, third strip groove; 3322, slide groove; 333, threaded sleeve; 334, pin shaft; 335, push rod; 336, gear; 337, first rack; 338, second rack; 339, second telescopic mechanism; 4, support arm; 41, wire wheel; 42, wire blocking rod; 5, support frame; 51, arc-shaped wall panel. DETAILED DESCRIPTION

[0040] The following will be combined with the attached Figure 1-Figure 11, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] Example 1

[0043] like Figure 1 As shown, a low-voltage cable intermittent tightening device includes a tightening tool 3, one end of which is provided with a clamp 2. Figure 2 As shown, the clamp 2 includes two semicircular clamp bodies 21, both ends of the clamp bodies 21 are provided with connecting lugs 22, and the clamp 2 is clamped on the pole 1 and connected by bolts; Figure 3 As shown, the wire tightening tool 3 includes a base 31, a wire fixing component 32 fixedly mounted at one end of the base 31, and a wire pulling component 33 slidably mounted at the other end of the base 31. Figure 6 , Figure 7 As shown, the wire fixing assembly 32 and the wire pulling assembly 33 both include a T-shaped seat 321, one end of the T-shaped seat 321 is provided with a guide groove 3211, and both sides of the T-shaped seat 321 are rotatably connected with a plurality of mutually parallel rotating arms 322. In the present embodiment, each side of the T-shaped seat 321 is rotatably connected with two rotating arms 322, and the plurality of rotating arms 322 ensure the clamping force of the wire fixing assembly 32 or the wire pulling assembly 33 on the cable, and the upper ends of the plurality of rotating arms 322 are pivotally connected with a linkage rod 324, and the lower ends of the rotating arms 322 are provided with a wire clamping head 323, and the upper end of the rotating arm 322 at the front end is pivotally connected with a connecting rod 325, and the other end of the connecting rod 325 is slidably installed in the guide groove 3211 and is pivotally connected with a sliding arm 326 on the outside; as shown Figure 4 , Figure 5As shown, the base 31 is provided with a first strip groove 311 and a second strip groove 312, the sliding arm 326 of the wire fixing component 32 is slidably installed in the first strip groove 311, and the sliding arm 326 of the wire pulling component 33 is slidably installed in the second strip groove 312; guide rails 313 are provided on both sides of the second strip groove 312, and a slider 331 is provided at the lower part of the T-shaped seat 321 of the wire pulling component 33, and the slider 331 is slidably installed in the guide rail 313; the lower part of the wire fixing component 32 is provided with an elastic structure, and the upper part of the base 31 is fixedly connected with a second telescopic mechanism 339, and one end of the second telescopic mechanism 339 is connected to the sliding arm 326 of the wire pulling component 33.

[0044] During the low-voltage cable tightening operation, the cable is first installed on both sides of the T-shaped seat 321 of the fixed line component 32 and the wire pulling component 33, and then the tensioning structure is controlled to drive the sliding arm 326 of the fixed line component 32 to move to the right, so that the fixed line component 32 clamps the cable, and the second telescopic mechanism 339 pulls the sliding arm 326 of the wire pulling component 33 to the right, first fixing and clamping the cable on the T-shaped seat 321 of the wire pulling component 33, and then the tensioning structure of the fixed line component 32 drives the sliding arm 326 of the fixed line component 32 to move to the left, so that the fixed line component 32 releases the cable, and the second telescopic mechanism 339 pulls the sliding arm 326 of the wire pulling component 33 to the right again, and uses the wire pulling component 33 to pull the cable to the right for a distance, and then the fixed line component 32 clamps the cable again, and the second telescopic mechanism 339 drives the wire pulling component 33 to reset, and repeats the above actions until the cable is tightened to the design requirements. In the present invention, the wire fixing assembly 32 and the wire pulling assembly 33 act alternately to realize intermittent cable tightening operation. In addition, the design of the T-shaped seat 321 enables multiple groups of cables to be tightened simultaneously during the tightening operation, thereby improving the efficiency of cable tightening.

[0045] like Figure 2 As shown, a slot 23 is provided in the middle of the clamp 2, a block 24 is slidably connected to the slot 23, and one end of the base 31 is connected to the block 24, which facilitates adjustment of the angle of the tensioning tool 3 on the pole 1, further improving the flexibility of the use of the tensioning device.

[0046] like Figure 1 , Fig.11 As shown, the lower part of the base 31 is hinged with a support frame 5, and the lower end of the support frame 5 is pivotally connected to an arc-shaped wall panel 51. The inner wall of the arc-shaped wall panel 51 is provided with anti-slip rubber. The arc-shaped wall panel 51 is against the outer wall of the pole 1 to support the base 31, thereby reducing the torque of the base 31 on the clamp 2, avoiding deformation of the clamp 2 or the base 31, and enhancing the stability of the base 31; one end of the base 31 is pivotally connected to the block 24, so as to facilitate the adjustment of the inclination angle of the base 31 according to the initial tightness of the cable, thereby ensuring the smoothness of the cable when tightening.

[0047] like Figure 6 , Figure 7 As shown, arc-shaped wire grooves 3212 are provided on both sides of the T-shaped seat 321. Anti-slip grooves are provided in the arc-shaped wire grooves 3212. The cable is placed in the arc-shaped wire grooves 3212, which increases the contact area between the T-shaped seat 321 and the cable, and ensures the stability of the wire fixing component 32 or the wire pulling component 33 when clamping the cable.

[0048] like Figure 6 , Figure 7 As shown, the T-shaped seat 321 is symmetrically connected with fixing pins 328 on both sides, and one end of the fixing pin 328 is movably connected with a wire blocking plate 329, and the lower end of the wire blocking plate 329 is a free end. When used for line tightening operation, the wire blocking plate 329 is rotated upward to place the cables on both sides of the T-shaped seat 321. After placement, the wire blocking plate 329 is released, and the wire blocking plate 329 falls freely to close the openings on both sides of the T-shaped seat 321, thereby preventing the cables from falling off from both sides of the T-shaped seat 321 during the line tightening operation.

[0049] like Figure 4 As shown, two sets of support arms 4 are provided at one end of the base 31, and a wire-passing wheel 41 is provided on the upper part of the support arm 4. The cable is placed on the upper part of the wire-passing wheel 41 to avoid large-angle bending between the cable and the T-shaped seat 321 of the wire pulling assembly 33, which affects the smoothness of cable tightening. A detachable wire-stopping rod 42 is provided on the upper part of the wire-passing wheel 41 to prevent the cable from falling off the support arm 4. After the cable tightening is completed, the wire-stopping rod 42 is removed and the cable can be taken out from the support arm 4.

[0050] like Figure 5 As shown, the lower two sides of the second strip groove 312 are provided with clamping strips 315. Figure 7 As shown, a sliding seat 332 is provided at the lower part of the base 31, and both sides of the sliding seat 332 are slidably installed in the clamping strip 315, and one end of the sliding seat 332 is fixedly connected to the sliding arm 326 of the pull wire assembly 33, as shown in FIG. Figure 8As shown, the sliding seat 332 is provided with a third strip groove 3321 in the middle, and the sliding seat 332 is symmetrically provided with slide grooves 3322 on both sides, and the slide grooves 3322 include a lower horizontal groove, an upper horizontal groove, and an inclined groove connecting the lower horizontal groove and the upper horizontal groove. A through hole 314 is provided in the middle of the base 31, and a push rod 335 is connected with a gap inside the third strip groove 3321. The upper end of the push rod 335 is installed in the through hole 314 with a gap, and pins 334 are provided on both sides of the push rod 335. The pin shaft 334 is slidably installed inside the slide groove 3322, and when the wire pulling assembly 33 is loosened from the cable, the pin shaft 334 is located in the upper horizontal groove, and the upper end of the push rod 335 is pressed tightly against the lower surface of the T-shaped seat 321; when the wire pulling assembly 33 pulls the wire to the right, the sliding arm 326 drives the sliding seat 332 to move to the right, and the push rod 335 and the T-shaped seat 321 remain in a clamped state to prevent the T-shaped seat 321 from sliding on the base 31. After the cable is clamped, the inclined groove of the sliding seat 332 moves to the position of the pin 334. When the sliding seat 332 continues to move to the right, the top rod 335 moves downward under the combined action of the sliding groove 3322 and the through hole 314, so that the top rod 335 is separated from the T-shaped seat 321. At this time, when the sliding arm 326 is continued to be pulled to the right, the cable pulling assembly 33 pulls the cable to the right to tighten the cable. When the tightening operation is completed, the second telescopic mechanism 339 pushes the cable pulling assembly 33 to the left, and the rotating arm 322 of the cable pulling assembly 33 is As the cable is gradually loosened, the sliding seat 332 moves to the left with the sliding arm 326. When the wire pulling assembly 33 moves to the left and into position, the push rod 335, under the joint action of the pin shaft 334, the slide groove 3322 and the through hole 314, presses the T-shaped seat 321 again, thereby avoiding the need for manual intervention to fix the T-shaped seat 321 in the early stage of the wire tightening operation when the T-shaped seat 321 of the wire pulling assembly 33 moves to the right, so as to achieve the clamping action of the cable, thereby reducing the labor intensity of the operators and improving the efficiency of the operation.

[0051] like Figure 8 As shown, the outer thread of the push rod 335 is connected to a threaded sleeve 333, and the threaded sleeve 333 is installed in the through hole 314 with a gap. The pin 334 is fixedly installed on both sides of the threaded sleeve 333 to facilitate the adjustment of the tightening force between the push rod 335 and the bottom of the T-shaped seat 321.

[0052] like Figure 6As shown, the tensioning structure includes a first telescopic mechanism 327, and the first telescopic mechanism 327 and the second telescopic mechanism 339 include a cylinder, a hydraulic cylinder or an electric push rod. In the present embodiment, the first telescopic mechanism 327 and the second telescopic mechanism 339 both use hydraulic cylinders; one end of the first telescopic mechanism 327 is fixedly connected to the sliding arm 326 of the wire fixing component 32, and when the wire pulling component 33 tightens the wire to the right, the first telescopic mechanism 327 contracts, driving the sliding arm 326 of the wire fixing component 32 to move to the left end of the first strip groove 311, so that the rotating arm 322 of the wire fixing component 32 is loosened from the cable; when the wire pulling component 33 returns to the left, the first telescopic mechanism 327 extends, driving the sliding arm 326 of the wire fixing component 32 to move to the right end of the first strip groove 311, so that the rotating arm 322 of the wire fixing component 32 clamps the cable to prevent the cable from loosening.

[0053] Example 2

[0054] In Example 1, the tensioning structure uses a single telescopic structure. In actual application, it is found that this structure not only makes the overall weight of the tensioning device heavier, but also has certain difficulties in the installation process, and also requires high control accuracy of the first telescopic structure and the second telescopic structure. In order to solve this defect, Fig. 9 , Fig.10 As shown, in the present embodiment, the tensioning structure includes a gear 336 rotatably mounted at the lower part of the base 31, one side of the gear 336 is meshed with a first rack 337, and the other side of the gear 336 is meshed with a second rack 338, one end of the first rack 337 is fixedly connected to the sliding seat 332, and one end of the second rack 338 is fixedly connected to the sliding arm 326 of the fixed component, and the number of teeth of the second rack 338 is less than the number of teeth of the first rack 337; when the wire pulling assembly 33 is tightening the wire to the right, in the process of the wire pulling assembly 33 clamping the cable, the first rack 337 moves to the right to drive the gear 336 to rotate, and the gear 336 drives the second rack 338 and the sliding arm 326 to rotate. The movable arm 326 moves to the left, and as the cable is clamped by the wire pulling assembly 33, the wire fixing assembly 32 gradually loosens the cable. When the cable is completely clamped by the wire pulling assembly 33, the teeth of the second rack 338 are all located on the left side of the gear 336. When the wire pulling assembly 33 continues to tighten the wire to the right, the second rack 338 no longer moves to the left, so that the rotating arm 322 and the cable remain in a loosened state; when the wire pulling assembly 33 returns to the left, the first rack 337 moves to the left and drives the gear 336 to rotate in the opposite direction. At this time, the gear 336 and the second rack 338 are instantly meshed and drive the second rack 338 to move to the right, so that the rotating arm 322 of the wire fixing assembly 32 clamps the cable in time to prevent the cable from loosening.

[0055] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A low-voltage cable intermittent tensioning device, comprising a tensioning tool, one end of which is provided with a clamp, the clamp comprising two semicircular clamp bodies, both ends of which are provided with connecting lugs; characterized in that: The wire tightening tool comprises a base, a wire fixing component fixedly mounted on one end of the base and a wire pulling component slidably mounted on the other end of the base, the wire fixing component and the wire pulling component both comprise a T-shaped seat, one end of the T-shaped seat is provided with a guide groove, both sides of the T-shaped seat are rotatably connected with a plurality of mutually parallel rotating arms, the upper ends of the plurality of rotating arms are pivotally connected with a linkage rod, the lower end of the rotating arm is provided with a wire clamping head, the upper end of the rotating arm at the front end is pivotally connected with a connecting rod, the other end of the connecting rod is slidably mounted in the guide groove and is pivotally connected with a sliding arm on the outside; a first strip groove and a second strip groove are provided on the base, the sliding arm of the wire fixing component is slidably mounted in the first strip groove, and the sliding arm of the wire pulling component is slidably mounted in the second strip groove; guide rails are provided on both sides of the second strip groove, a slider is provided at the lower part of the T-shaped seat of the wire pulling assembly, and the slider is slidably mounted in the guide rails; a loosening mechanism is provided at the lower part of the wire fixing component The tightening structure is a second telescopic mechanism fixedly connected to the upper part of the base, and one end of the second telescopic mechanism is connected to the sliding arm of the wire pulling assembly; when the low-voltage cable is tightened, the cable is first installed on both sides of the T-shaped seat of the wire fixing assembly and the wire pulling assembly, and then the tensioning structure is controlled to drive the sliding arm of the wire fixing assembly to move to the right, so that the wire fixing assembly clamps the cable, and the second telescopic mechanism pulls the sliding arm of the wire pulling assembly to the right again, first fixing and clamping the cable on the T-shaped seat of the wire pulling assembly, and then the tensioning structure of the wire fixing assembly drives the sliding arm of the wire fixing assembly to move to the left, so that the wire fixing assembly releases the cable, and the second telescopic mechanism pulls the sliding arm of the wire pulling assembly to the right again, and uses the wire pulling assembly to drive the cable to be tightened to the right for a distance, and then the wire fixing assembly clamps the cable again, and the second telescopic mechanism drives the wire pulling assembly to reset, and repeats the above actions until the cable is tightened to the design requirements.

2. A low-voltage cable intermittent tensioning device according to claim 1, characterized in that: A clamping groove is provided in the middle of the clamping hoop, a clamping block is slidably connected in the clamping groove, and one end of the base is connected to the clamping block.

3. A low-voltage cable intermittent tensioning device according to claim 1, characterized in that: A support frame is hinged at the lower part of the base, and an arc-shaped wall panel is pivoted at the lower end of the support frame. Anti-slip rubber is arranged on the inner wall of the arc-shaped wall panel, and the arc-shaped wall panel abuts against the outer wall of the pole to support the base; one end of the base is pivoted to the block.

4. A low-voltage cable intermittent tensioning device according to claim 1, characterized in that: Both sides of the T-shaped seat are provided with arc-shaped wire grooves, and anti-slip grooves are arranged in the arc-shaped wire grooves, and the cables are placed in the arc-shaped wire grooves.

5. The intermittent tensioning device for low-voltage cables according to claim 1, characterized in that: The T-shaped seat is symmetrically connected with fixing pins on both sides, and one end of the fixing pin is movably connected with a wire blocking plate, and the lower end of the wire blocking plate is a free end. When used for wire tightening operations, the wire blocking plate is rotated upward and the cables are placed on both sides of the T-shaped seat. After placement, the wire blocking plate is released and the wire blocking plate falls freely to close the openings on both sides of the T-shaped seat.

6. The intermittent tensioning device for low-voltage cables according to claim 1, characterized in that: One end of the base is provided with two groups of support arms, the upper part of the support arms is provided with a wire passing wheel, the cable is placed on the upper part of the wire passing wheel, and the upper part of the wire passing wheel is provided with a detachable wire blocking rod.

7. A low-voltage cable intermittent tensioning device according to any one of claims 1 to 6, characterized in that: The second strip groove is provided with clamping strips on both sides of the lower part, and a sliding seat is provided at the lower part of the base. Both sides of the sliding seat are slidably installed in the clamping strips. One end of the sliding seat is fixedly connected to the sliding arm of the wire pulling assembly. A third strip groove is provided in the middle of the sliding seat. Slide grooves are symmetrically provided on both sides of the sliding seat. The slide grooves include a lower horizontal groove, an upper horizontal groove and an inclined groove connecting the lower horizontal groove and the upper horizontal groove. A through hole is provided in the middle of the base. A push rod is gap connected to the inside of the third strip groove. The upper end of the push rod is gap installed in the through hole. Pin shafts are provided on both sides of the push rod. The pin shaft is slidably installed in the inside of the slide groove. When the wire pulling assembly and the cable are loosened, the pin shaft is located in the upper horizontal groove, and the upper end of the push rod is pressed tightly against the lower surface of the T-shaped seat.

8. The intermittent tensioning device for low-voltage cables according to claim 7, characterized in that: The outer thread of the push rod is connected with a threaded sleeve, the threaded sleeve is installed in the through hole with a gap, and the pin shaft is fixedly installed on both sides of the threaded sleeve.

9. The intermittent tensioning device for low-voltage cables according to claim 7, characterized in that: The tensioning structure includes a first telescopic mechanism, and the first telescopic mechanism and the second telescopic mechanism include a cylinder, a hydraulic cylinder or an electric push rod; one end of the first telescopic mechanism is fixedly connected to the sliding arm of the wire fixing component, and when the wire pulling component tightens the wire to the right, the first telescopic mechanism contracts, driving the sliding arm of the wire fixing component to move to the left end of the first strip groove, so that the rotating arm of the wire fixing component is loosened from the cable; when the wire pulling component returns to the left, the first telescopic mechanism extends, driving the sliding arm of the wire fixing component to move to the right end of the first strip groove, so that the rotating arm of the wire fixing component clamps the cable.

10. The intermittent tensioning device for low-voltage cables according to claim 7, characterized in that: The tensioning structure includes a gear rotatably mounted on the lower part of the base, a first rack meshing on one side of the gear, and a second rack meshing on the other side of the gear, one end of the first rack is fixedly connected to the sliding seat, and one end of the second rack is fixedly connected to the sliding arm of the fixing component, and the number of teeth of the second rack is less than the number of teeth of the first rack; when the wire pulling assembly is operating to tighten the wire to the right, in the process of the wire pulling assembly clamping the cable, the first rack moves to the right to drive the gear to rotate, and the gear drives the second rack and the sliding arm to move to the left. As the cable is clamped by the wire pulling assembly, the wire fixing assembly gradually loosens the cable. When the cable is completely clamped by the wire pulling assembly, the teeth of the second rack are all located on the left side of the gear. When the wire pulling assembly continues to tighten the wire to the right, the second rack no longer moves to the left, so that the rotating arm and the cable remain in a loosened state; when the wire pulling assembly returns to the left, the first rack moves to the left to drive the gear to rotate in the opposite direction. At this time, the gear and the second rack are instantly meshed and drive the second rack to move to the right, so that the rotating arm of the wire fixing assembly clamps the cable in time.

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