A cable tensioning device for electrical engineering

Abstract

The application relates to the technical field of electric power engineering, in particular to a cable tensioning device for electric power engineering, which comprises a disc rack, a shielding bin is fixedly installed at the upper end of the disc rack, the free end of a cable penetrates the inside of the shielding bin, a driving sleeve is fixedly installed in the inside of the shielding bin, a shielding cylinder is fixedly installed in the inside of the shielding bin, a traction device is arranged between the driving sleeve and the shielding cylinder, and the traction device is used for continuously and actively tractioning the cable. The independent hydraulic traction device composed of the driving sleeve, the pressure cylinder, the push rod and the traction frame bears the main axial tension load, the wire coil only bears the storage function under the low tension state, the design of the separation of the tensioning and the storage completely avoids the non-uniform internal stress accumulation caused by the layer-by-layer high tension overlap of the cable on the surface of the wire coil, the copper wire in the cable is protected from mechanical extrusion deformation, distortion or insulation layer thinning, and the service life and the operation safety of the cable are remarkably prolonged.

Description

Technical Field

[0001] This invention relates to the field of power engineering technology, specifically to a cable tensioning device for power engineering. Background Technology

[0002] In the construction of power engineering projects, cable laying is an important part of the construction of transmission lines, underground pipe corridors, power distribution networks and large industrial power supply systems. During long-distance cable laying, it is usually necessary to use tensioning devices to continuously tighten the cables to ensure the straightness and stability of the cables after laying, and to avoid problems such as slackness, retraction or entanglement of the cables, thereby improving the safety of subsequent operation and construction quality.

[0003] Most existing cable tensioning devices use a reel to directly wind and pull the cable, generating tension through the rotation of the reel to tighten the cable. Although this method is relatively simple in structure, during continuous high-tension traction, the cable will be wrapped in multiple layers on the surface of the reel, causing the cable to be under localized pressure for a long time. This can easily lead to non-uniform stress accumulation inside the cable, causing the internal copper wires to be squeezed, deformed, or twisted, and even causing the insulation layer to be thinned due to pressure. This not only affects the service life of the cable but also reduces the safety of the cable during operation. Therefore, this application proposes a cable tensioning device for power engineering. Summary of the Invention

[0004] The purpose of this invention is to provide a cable tensioning device for power engineering to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cable tensioning device for power engineering, comprising a reel frame, a reel rotatably mounted on the upper end of the reel frame, a shielding chamber fixedly mounted on the upper end of the reel frame, a cable wound on the outer surface of the reel, and the free end of the cable penetrating the interior of the shielding chamber, a drive sleeve fixedly mounted inside the shielding chamber, and a shielding cylinder fixedly mounted inside the shielding chamber, with the shielding cylinder corresponding to the drive sleeve. A traction device is provided between the drive sleeve and the shielding cylinder. The traction device is used to continuously and actively pull the cable to provide independent axial tension during the cable laying and straightening process. By sharing the main tensioning load through the traction device, the defect of the traditional structure, which relies entirely on the rotation of the reel to generate tension, causing the cable to bear huge tension during winding, is changed.

[0006] As a further embodiment of the present invention, two conversion frames are fixedly installed on the upper end of the tray frame, a lead screw is rotatably installed between the two conversion frames, a conversion block is provided between the two conversion frames, the conversion block is slidably installed on the upper end of the tray frame, and the conversion block is threaded onto the outer surface of the lead screw, and a guide ring is fixedly installed on the upper end of the conversion block, and the guide ring is sleeved on the outside of the cable.

[0007] As a further embodiment of the present invention, the traction device includes a plurality of pressure cylinders, which are evenly distributed in a ring along the circumference of the drive sleeve, and are all fixedly installed on the outer surface of the drive sleeve. A traction frame is slidably installed inside the shielding cylinder, and a push rod is slidably installed inside each of the plurality of pressure cylinders. The end of the push rod away from the corresponding pressure cylinder is fixedly connected to the traction frame.

[0008] As a further embodiment of the present invention, multiple guide pipes are fixedly installed on the outer surface of the drive sleeve, and the multiple pressure cylinders are respectively connected to the distribution pipe through corresponding guide pipes, so that the hydraulic oil inside the distribution pipe can enter the interior of the multiple pressure cylinders synchronously. By setting multiple guide pipes to connect the distribution pipe and the multiple pressure cylinders respectively, the hydraulic oil can be synchronously delivered to the interior of the multiple pressure cylinders, thereby ensuring that the multiple pressure cylinders can output thrust synchronously, improving the uniformity of force during the movement of the traction frame, avoiding deviation or jamming during traction, and thus improving the stability and reliability of cable traction and tensioning.

[0009] As a further embodiment of the present invention, a traction cone sleeve is provided between the traction frame and the drive sleeve, the cable passes through the interior of the traction cone sleeve, and multiple rectangular holes are opened on the outer surface of the traction cone sleeve. The multiple rectangular holes are evenly distributed in a ring shape along the circumference of the traction cone sleeve. A downward pressure rod is slidably installed inside each of the multiple rectangular holes. Multiple clamping plates are provided inside the traction cone sleeve, and the multiple clamping plates are fixedly connected to the corresponding downward pressure rods.

[0010] As a further aspect of the present invention, the outer surface of the traction cone sleeve is provided with multiple guide grooves, and the end of the pressing rod away from the clamping plate is slidably installed in the corresponding guide groove to guide and restrict the movement trajectory of the pressing rod, so that the pressing rod can move stably in the radial direction of the traction cone sleeve. By providing multiple guide grooves on the outer surface of the traction cone sleeve and guiding and restricting the movement trajectory of the pressing rod, the pressing rod can move stably in the radial direction of the traction cone sleeve, thereby improving the stability and consistency when multiple clamping plates clamp simultaneously, avoiding the clamping plates from shifting or jamming, and thus ensuring the clamping reliability during the cable traction process.

[0011] As a further embodiment of the present invention, a plurality of traction rods are rotatably mounted on the inner end of the traction frame, and the plurality of traction rods are respectively arranged corresponding to the corresponding pressing rods, and the ends of the traction rods are slidably connected to the outer surface of the pressing rods.

[0012] As a further embodiment of the present invention, a support ring is fixedly installed inside the shielding cylinder, a self-locking sleeve is fixedly installed inside the shielding cylinder, and a guide frame is fixedly installed at one end of the self-locking sleeve near the support ring. The cable passes through the interior of the self-locking sleeve. By setting the support ring, self-locking sleeve and guide frame inside the shielding cylinder, the cable passes through the interior of the self-locking sleeve for transportation, thereby providing a stable installation foundation and guiding support for the subsequent self-locking structure, improving the stability of the cable during the traction and locking process, and preventing the cable from deviating during movement.

[0013] Multiple guide tubes are fixedly installed on the side of the support ring near the self-locking sleeve. The multiple guide tubes are evenly distributed in a ring shape along the circumference of the support ring. Self-locking rods are slidably installed inside the multiple guide tubes. The ends of the multiple self-locking rods away from the guide tubes all penetrate the interior of the guide frame.

[0014] As a further embodiment of the present invention, the outer surface of the self-locking sleeve is provided with a plurality of rectangular holes, which are distributed in a ring around the circumference of the self-locking sleeve. A self-locking block is slidably installed inside each of the plurality of rectangular holes. An inclined sliding groove is provided on the surface of the self-locking block, and the end of the self-locking rod away from the guide tube slides in contact with the inclined sliding groove on the surface of the corresponding self-locking block.

[0015] As a further embodiment of the present invention, a passive tube is slidably installed inside the guide tube, and the passive tube is connected to the guide tube by a return spring. The end of the passive tube away from the support ring is correspondingly arranged with the outer surface of the traction frame, and a support seat is fixedly installed at the end of the passive tube close to the support ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention uses an independent hydraulic traction device consisting of a drive sleeve, a pressure cylinder, a push rod, and a traction frame to bear the main axial tension load, while the cable reel only bears the storage function under low tension. This "tension-storage separation" design completely avoids the non-uniform internal stress accumulation caused by the layer-by-layer high tension overlap of the cable on the surface of the cable reel, protects the copper wires inside the cable from mechanical extrusion deformation, twisting, or thinning of the insulation layer, and significantly extends the service life and operational safety of the cable.

[0018] 2. The present invention adds a mechanical self-locking mechanism consisting of a passive tube, a self-locking rod and a self-locking block inside the shielding cylinder. When the hydraulic traction device drives the cable forward to the set stroke, the self-locking block can be automatically triggered by mechanical linkage to dynamically clamp and lock the cable, transferring the tension to the self-locking sleeve and the shielding cylinder. During the hydraulic stage depressurization and traction frame reset, the self-locking mechanism can keep the cable in a taut state, effectively preventing the cable from shrinking or loosening, and realizing a stable and safe "step-by-step" cyclic tensioning operation.

[0019] 3. This invention, by setting a lead screw driven by a servo motor and a reciprocating conversion block at the upper end of the reel frame, enables the guide ring on the conversion block to drive the cable to move uniformly laterally along the axial direction of the reel during low-tension winding. This design effectively avoids the problems of local overlap, accumulation, or jamming of the cable during winding, improving the neatness of the reel winding. At the same time, during dynamic wire feeding (taking only what is needed), this reciprocating guide mechanism can also reduce the probability of cable tangling, knotting, and segregation, ensuring a smooth feeding process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cable tensioning device.

[0021] Figure 2 This is a structural diagram of the conversion frame and conversion block;

[0022] Figure 3 This is a schematic diagram of the internal structure of the shielding chamber;

[0023] Figure 4 This is a schematic diagram of the internal structure of the shielding cylinder;

[0024] Figure 5 This is a structural diagram of the drive sleeve and the traction frame;

[0025] Figure 6 This is a schematic diagram of the disassembled structure of the traction cone sleeve and the lower pressure rod;

[0026] Figure 7 This is a schematic diagram of the internal structure of the traction cone sleeve;

[0027] Figure 8 This is a structural diagram showing the disassembled structure of the support ring and the self-locking sleeve;

[0028] Figure 9 This is a schematic diagram of the internal structure of the guide tube;

[0029] Figure 10 This is a schematic diagram of the internal structure of a passive tube.

[0030] In the diagram: 1. Reel rack; 2. Conversion rack; 3. Cable reel; 4. Shielding compartment; 5. Cable;

[0031] 101. Converter block; 102. Lead screw;

[0032] 201. Drive sleeve; 202. Distribution pipe; 203. Pressure cylinder; 204. Pressure pipe; 205. Push rod; 206. Traction frame; 207. Conductor pipe; 208. Traction cone sleeve; 209. Guide groove; 210. Downward pressure rod; 211. Traction rod; 212. Clamping plate;

[0033] 301. Shielding cylinder; 302. Support ring; 303. Guide tube; 304. Self-locking sleeve; 305. Self-locking block; 306. Guide frame; 307. Self-locking rod; 308. Passive tube; 309. Center rod; 310. Return spring; 311. Traction line; 312. Return shaft; 313. Support seat. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1-3 A cable tensioning device for power engineering includes a reel frame 1, a wire reel 3 rotatably mounted on the upper end of the reel frame 1, a shielding chamber 4 fixedly mounted on the upper end of the reel frame 1, a cable 5 wound on the outer surface of the wire reel 3, and the free end of the cable 5 passing through the interior of the shielding chamber 4, a drive sleeve 201 fixedly mounted inside the shielding chamber 4, a shielding cylinder 301 fixedly mounted inside the shielding chamber 4, and the shielding cylinder 301 and the drive sleeve 201 are correspondingly arranged, and a traction device is provided between the drive sleeve 201 and the shielding cylinder 301.

[0036] The traction device is used to continuously and actively pull the cable 5 to provide independent axial tension during the construction, laying and straightening of the cable 5. By sharing the main tension load through the traction device, the defect of the traditional structure that relies entirely on the rotation of the coil 3 to generate tension, which causes the cable 5 to bear huge tension when winding, is changed. It effectively avoids the radial centripetal extrusion force caused by excessive tension when the cable 5 is stacked layer by layer on the surface of the coil 3, thereby significantly reducing the internal residual stress of the cable 5 during the recycling process and protecting the internal core of the cable 5 from extrusion deformation due to non-uniform stress.

[0037] A distribution pipe 202 is fixedly installed on the outer surface of the drive sleeve 201. A pressure pipe 204 is fixedly installed at the input end of the distribution pipe 202. The pressure pipe 204 is used to transport hydraulic oil. A hydraulic device (not shown in the figure) is installed at the upper end of the frame 1. The hydraulic device is an existing mature device. The specific working principle and device are existing mature devices, and will not be described in detail here. The output end of the hydraulic device is fixedly connected to the input end of the pressure pipe 204 so as to provide power support to the traction device through hydraulic oil, so that the traction device can stably pull the cable 5.

[0038] Two conversion frames 2 are fixedly installed on the upper end of the disc frame 1. A lead screw 102 is rotatably installed between the two conversion frames 2. A conversion block 101 is provided between the two conversion frames 2. The conversion block 101 is slidably installed on the upper end of the disc frame 1, and the conversion block 101 is threaded onto the outer surface of the lead screw 102.

[0039] Specifically, a servo motor (not shown in the figure) is fixedly installed on the surface of the conversion frame 2. The output end of the servo motor is fixedly connected to the lead screw 102 so as to drive the lead screw 102 to rotate. A guide ring is fixedly installed on the upper end of the conversion block 101. The guide ring is sleeved on the outside of the cable 5. Therefore, during the rotation of the lead screw 102 driven by the servo motor, the conversion block 101 can reciprocate along the axial direction of the lead screw 102 and drive the cable 5 to move laterally on the outside of the reel 3. This allows the reel 3 to evenly wind the cable 5 during the rotation and winding process, avoiding local accumulation of the cable 5 and improving the neatness of the cable 5 during winding.

[0040] At the same time, when laying out cable 5, the conversion block 101 can also drive cable 5 to reciprocate and guide it, so that cable 5 can be released evenly, thereby reducing the problems of cable 5 tangling, knotting and deviation during the laying process.

[0041] Example 2: Please refer to Figures 3-5 A cable tensioning device for power engineering, based on Embodiment 1, includes a traction device comprising multiple pressure cylinders 203, which are evenly distributed in a ring along the circumference of a drive sleeve 201, and are all fixedly installed on the outer surface of the drive sleeve 201. A traction frame 206 is slidably installed inside a shielding cylinder 301, and push rods 205 are slidably installed inside each of the multiple pressure cylinders 203. The end of each push rod 205 away from the corresponding pressure cylinder 203 is fixedly connected to the traction frame 206.

[0042] Specifically, a movable plug (not shown in the figure) is fixedly installed at one end of the push rod 205 inside the pressure cylinder 203. The outer surface of the movable plug is tightly fitted with the inner wall of the pressure cylinder 203 so that the movable plug can be moved by hydraulic oil. Multiple guide pipes 207 are fixedly installed on the outer surface of the drive sleeve 201. Multiple pressure cylinders 203 are connected to the distribution pipe 202 through the corresponding guide pipes 207, so that the hydraulic oil inside the distribution pipe 202 can enter the interior of multiple pressure cylinders 203 simultaneously.

[0043] Therefore, when the hydraulic device delivers hydraulic oil to the distribution pipe 202 through the pressure pipe 204, the hydraulic oil enters the corresponding pressure cylinder 203 through the guide pipe 207 and pushes the movable plug and push rod 205 to move synchronously, thereby driving the traction frame 206 to move axially along the inside of the shielding cylinder 301 so as to continuously pull the cable 5.

[0044] like Figures 5 to 7 As shown, a traction cone sleeve 208 is provided between the traction frame 206 and the drive sleeve 201. The cable 5 passes through the interior of the traction cone sleeve 208. Multiple rectangular holes are opened on the outer surface of the traction cone sleeve 208. The multiple rectangular holes are evenly distributed in a ring shape along the circumference of the traction cone sleeve 208. A downward pressure rod 210 is slidably installed inside each of the multiple rectangular holes. Multiple clamping plates 212 are provided inside the traction cone sleeve 208. The multiple clamping plates 212 are fixedly connected to the corresponding downward pressure rod 210.

[0045] The outer surface of the traction cone sleeve 208 is provided with multiple guide grooves 209. The end of the pressing rod 210 away from the clamping plate 212 is slidably installed in the corresponding guide groove 209 so as to guide and limit the movement trajectory of the pressing rod 210, so that the pressing rod 210 can move stably in the radial direction of the traction cone sleeve 208.

[0046] Multiple traction rods 211 are rotatably mounted on the inner end of the traction frame 206. The multiple traction rods 211 are respectively set to correspond to the corresponding pressing rods 210, and the ends of the traction rods 211 are slidably connected to the outer surface of the pressing rods 210, so as to adapt to the movement space of the pressing rods 210 during the movement process in the guide groove 209.

[0047] When the traction frame 206 moves away from the traction cone sleeve 208, multiple traction rods 211 rotate synchronously and pull the corresponding pressing rods 210 to move along the inside of the guide groove 209. At this time, multiple clamping plates 212 move synchronously towards each other and gradually come into contact with the outer surface of the cable 5.

[0048] As the traction frame 206 continues to move, the pushing effect of the lower pressure rod 210 on the clamping plate 212 gradually increases, thereby causing the multiple clamping plates 212 to generate a gradually increasing clamping force on the cable 5, so as to improve the connection stability between the cable 5 and the traction cone sleeve 208. Therefore, during the process of the traction frame 206 driving the traction cone sleeve 208 to move as a whole, the cable 5 can be stably driven to move synchronously, thereby realizing the continuous traction and tensioning of the cable 5.

[0049] like Figure 4 , Figures 8-10 As shown, a support ring 302 is fixedly installed inside the shielding cylinder 301, and a self-locking sleeve 304 is fixedly installed inside the shielding cylinder 301. A guide frame 306 is fixedly installed at one end of the self-locking sleeve 304 near the support ring 302, and the cable 5 passes through the interior of the self-locking sleeve 304.

[0050] Multiple guide tubes 303 are fixedly installed on the side of the support ring 302 near the self-locking sleeve 304. The multiple guide tubes 303 are evenly distributed in a ring shape along the circumference of the support ring 302. Self-locking rods 307 are slidably installed inside the multiple guide tubes 303. The end of the multiple self-locking rods 307 away from the guide tubes 303 passes through the interior of the guide frame 306.

[0051] Multiple rectangular holes are provided on the outer surface of the self-locking sleeve 304. The multiple rectangular holes are distributed in a ring around the circumference of the self-locking sleeve 304. A self-locking block 305 is slidably installed inside each of the multiple rectangular holes. An inclined sliding groove is provided on the surface of the self-locking block 305, and the end of the self-locking rod 307 away from the guide tube 303 slides in contact with the inclined sliding groove on the surface of the corresponding self-locking block 305.

[0052] Therefore, when the self-locking rod 307 moves along the inside of the guide tube 303, it can push the self-locking block 305 to move radially through the inclined slide groove, so as to achieve clamping and locking of the cable 5.

[0053] A passive tube 308 is slidably installed inside the guide tube 303. The passive tube 308 is connected to the guide tube 303 by a return spring 310. The end of the passive tube 308 away from the support ring 302 is correspondingly set to the outer surface of the traction frame 206. A support seat 313 is fixedly installed at the end of the passive tube 308 close to the support ring 302.

[0054] A center rod 309 is fixedly installed at one end of the self-locking rod 307 near the support base 313. A reset shaft 312 is rotatably installed on the surface of the support base 313. A traction line 311 is fixedly wound on the outer surface of the reset shaft 312, and the free end of the traction line 311 is fixedly connected to the end of the center rod 309.

[0055] Specifically, the reset shaft 312 and the support base 313 are connected by a torsion spring, and the spring force of the reset spring 310 is greater than that of the torsion spring. Therefore, in the default state, the reset spring 310 keeps the passive tube 308 in the reset position, while the torsion spring is in the stored state.

[0056] Specifically, a guide ring is fixedly installed at one end of the passive tube 308 near the support base 313. The guide ring is sleeved on the outside of the traction line 311 to guide the movement trajectory of the traction line 311, thereby improving the winding stability of the traction line 311 by the reset shaft 312.

[0057] The working principle of this invention is:

[0058] In use, the hydraulic device delivers hydraulic oil to the inside of the distribution pipe 202 through the pressure pipe 204. The hydraulic oil enters the inside of multiple pressure cylinders 203 through the guide pipe 207. At this time, the hydraulic pressure inside the multiple pressure cylinders 203 increases synchronously and pushes the corresponding push rod 205 to move. The multiple push rods 205 synchronously drive the traction frame 206 to move axially along the inside of the shielding cylinder 301.

[0059] As the traction frame 206 moves, multiple traction rods 211 rotate synchronously, driving the corresponding pressing rods 210 to move along the inside of the guide groove 209. At this time, multiple clamping plates 212 move synchronously in the direction of mutual approach and gradually come into contact with the outer surface of the cable 5.

[0060] As the traction frame 206 continues to move, the pushing effect of the lower pressure rod 210 on the clamping plate 212 gradually increases, thereby causing the multiple clamping plates 212 to generate a gradually increasing clamping force on the cable 5, so as to improve the connection stability between the cable 5 and the traction cone sleeve 208. Therefore, during the process of the traction frame 206 driving the traction cone sleeve 208 to move as a whole, it can stably drive the cable 5 to move synchronously, thereby realizing the continuous traction and tensioning of the cable 5.

[0061] At the same time, when the traction frame 206 moves toward the support ring 302, the outer surface of the traction frame 206 contacts the end of the passive tube 308 away from the support ring 302, and pushes the passive tube 308 to move synchronously along the inside of the guide tube 303;

[0062] As the passive tube 308 continues to move, the reset spring 310 is gradually compressed. At this time, the torsion spring, which is in a stored state, gradually releases its elastic force and drives the reset shaft 312 to rotate, thereby causing the traction line 311 to gradually wind around to the outer surface of the reset shaft 312.

[0063] Subsequently, during the movement of the passive tube 308, the passive tube 308 pushes the central rod 309 to move synchronously, thereby driving the self-locking rod 307 to move along the inside of the guide tube 303. At this time, the self-locking rod 307 pushes the self-locking block 305 to move towards the cable 5 through the inclined slide groove, so that multiple self-locking blocks 305 simultaneously contact the outer surface of the cable 5 and clamp and lock the cable 5.

[0064] Therefore, after the traction device completes the traction and tightening of the cable 5, the self-locking block 305 can continuously lock and limit the cable 5, thereby reducing the possibility of the cable 5 retracting or loosening and improving the stability of the cable 5 after tightening.

[0065] During the depressurization process of the hydraulic device, the hydraulic pressure inside the pressure cylinder 203 gradually decreases, and the traction frame 206 moves towards the initial position under the reset action. At the same time, the passive tube 308 is reset synchronously under the release action of the reset spring 310.

[0066] During the phased depressurization process of the hydraulic device, the hydraulic pressure inside the pressure cylinder 203 gradually decreases, the traction frame 206 moves to the initial position under the reset action, and the clamping plate 212 releases the cable 5; at this time, since the front end of the cable 5 is locked and limited by the self-locking block 305, the huge tension generated by the traction is completely borne and unloaded by the self-locking sleeve 304 and the shielding cylinder 301, so that the cable 5 retracting towards the cable reel 3 is in a relaxed state with low tension or no tension.

[0067] In this relaxed state, the drive mechanism and servo motor of the reel 3 are simultaneously activated. The servo motor drives the lead screw 102 to rotate, enabling the conversion block 101 to reciprocate along the axial direction of the lead screw 102, and causing the cable 5 in the low-tension state to move laterally on the outside of the reel 3. Since the rotation of the reel 3 at this time only serves to collect and store the low-tension cable 5, it completely avoids the increasing radial stress generated by the cable 5 being wrapped with high tension layer by layer on the surface of the reel 3, thus protecting the internal core of the cable 5 from being squeezed and deformed due to non-uniform stress.

[0068] After the reel 3 completes the neat winding of the current slack section of cable 5, the passive tube 308 is simultaneously reset under the elastic release of the reset spring 310. During the reset process of the passive tube 308, the traction wire 311 on the surface of the reset shaft 312 is gradually released until the traction wire 311 is tightened again. At this time, the traction wire 311 exerts a traction effect on the center rod 309 and drives the center rod 309 to move in the opposite direction, thereby causing the self-locking rod 307 to move away from the self-locking block 305. As the self-locking rod 307 moves, the self-locking block 305 loses the continuous squeezing effect of the self-locking rod 307 and gradually moves away from the cable 5 under the guidance of the inclined slide, thereby releasing the clamping and locking state of multiple self-locking blocks 305 on the cable 5, so that the traction device can perform the next traction and tightening operation on the cable 5, thereby realizing the step-by-step cyclic tightening and neat winding of the cable 5.

[0069] The above are merely preferred embodiments 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 tensioning device for power engineering, comprising a reel (1), characterized in that: A wire spool (3) is rotatably mounted on the upper end of the spool frame (1). A shielding chamber (4) is fixedly mounted on the upper end of the spool frame (1). A cable (5) is wound around the outer surface of the wire spool (3), and the free end of the cable (5) passes through the interior of the shielding chamber (4). A drive sleeve (201) is fixedly mounted inside the shielding chamber (4). A shielding cylinder (301) is fixedly mounted inside the shielding chamber (4), and the shielding cylinder (301) is correspondingly set with the drive sleeve (201). A traction device is provided between the drive sleeve (201) and the shielding cylinder (301). The traction device is used to continuously and actively traction the cable (5) to provide independent axial tension during the construction, laying and straightening of the cable (5). By sharing the main tension load through the traction device, the defect of the traditional structure that relies entirely on the rotation of the wire spool (3) to generate tension, resulting in the cable (5) bearing huge tension when wound, is changed.

2. The cable tensioning device for power engineering according to claim 1, characterized in that: Two conversion frames (2) are fixedly installed on the upper end of the tray frame (1). A lead screw (102) is rotatably installed between the two conversion frames (2). A conversion block (101) is provided between the two conversion frames (2). The conversion block (101) is slidably installed on the upper end of the tray frame (1), and the conversion block (101) is threaded onto the outer surface of the lead screw (102). A guide ring is fixedly installed on the upper end of the conversion block (101), and the guide ring is sleeved on the outside of the cable (5).

3. A cable tensioning device for power engineering according to claim 1, characterized in that: The traction device includes multiple pressure cylinders (203), which are evenly distributed in a ring along the circumference of the drive sleeve (201). The multiple pressure cylinders (203) are all fixedly installed on the outer surface of the drive sleeve (201). A traction frame (206) is slidably installed inside the shielding cylinder (301). A push rod (205) is slidably installed inside the multiple pressure cylinders (203). The end of the push rod (205) away from the corresponding pressure cylinder (203) is fixedly connected to the traction frame (206).

4. A cable tensioning device for power engineering according to claim 3, characterized in that: Multiple guide tubes (207) are fixedly installed on the outer surface of the drive sleeve (201). Multiple pressure cylinders (203) are connected to the distribution pipe (202) through the corresponding guide tubes (207), so that the hydraulic oil inside the distribution pipe (202) can enter the interior of multiple pressure cylinders (203) simultaneously.

5. A cable tensioning device for power engineering according to claim 4, characterized in that: A traction cone sleeve (208) is provided between the traction frame (206) and the drive sleeve (201). The cable (5) passes through the interior of the traction cone sleeve (208). Multiple rectangular holes are provided on the outer surface of the traction cone sleeve (208). The multiple rectangular holes are evenly distributed in a ring along the circumference of the traction cone sleeve (208). A pressure rod (210) is slidably installed inside each of the multiple rectangular holes. Multiple clamping plates (212) are provided inside the traction cone sleeve (208). The multiple clamping plates (212) are fixedly connected to the corresponding pressure rod (210).

6. A cable tensioning device for power engineering according to claim 5, characterized in that: The outer surface of the traction cone sleeve (208) is provided with multiple guide grooves (209). The end of the pressing rod (210) away from the clamping plate (212) is slidably installed in the corresponding guide groove (209) so as to guide and limit the movement trajectory of the pressing rod (210) so that the pressing rod (210) can move stably in the radial direction of the traction cone sleeve (208).

7. A cable tensioning device for power engineering according to claim 6, characterized in that: The inner end of the traction frame (206) is rotatably mounted with a plurality of traction rods (211), and the plurality of traction rods (211) are respectively arranged corresponding to the corresponding pressing rods (210), and the ends of the traction rods (211) are slidably connected to the outer surface of the pressing rods (210).

8. A cable tensioning device for power engineering according to claim 1, characterized in that: A support ring (302) is fixedly installed inside the shielding cylinder (301), and a self-locking sleeve (304) is fixedly installed inside the shielding cylinder (301). A guide frame (306) is fixedly installed at one end of the self-locking sleeve (304) near the support ring (302), and the cable (5) passes through the interior of the self-locking sleeve (304). The support ring (302) is fixedly installed with a plurality of guide tubes (303) on the side near the self-locking sleeve (304). The plurality of guide tubes (303) are evenly distributed in a ring shape along the circumference of the support ring (302). A self-locking rod (307) is slidably installed inside the plurality of guide tubes (303). The end of the plurality of self-locking rods (307) away from the guide tubes (303) passes through the interior of the guide frame (306).

9. A cable tensioning device for power engineering according to claim 8, characterized in that: The outer surface of the self-locking sleeve (304) is provided with a plurality of rectangular holes, which are distributed in a ring along the circumference of the self-locking sleeve (304). A self-locking block (305) is slidably installed inside each of the plurality of rectangular holes. An inclined sliding groove is provided on the surface of the self-locking block (305), and the end of the self-locking rod (307) away from the guide tube (303) slides in contact with the inclined sliding groove on the surface of the corresponding self-locking block (305).

10. A cable tensioning device for power engineering according to claim 9, characterized in that: A passive tube (308) is slidably installed inside the guide tube (303). The passive tube (308) is connected to the guide tube (303) by a return spring (310). The end of the passive tube (308) away from the support ring (302) is correspondingly set to the outer surface of the traction frame (206). A support seat (313) is fixedly installed at the end of the passive tube (308) close to the support ring (302).

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