Wire pulling device for butt joint of power cables

Abstract

The invention provides a cable pulling device for butt joint of power cables, and relates to the technical field of cable operation, the cable pulling device comprises a machine base, two sliding grooves are formed in the machine base in a spaced mode, two movable seats are arranged on one side of the machine base, one end of each movable seat is arranged in the corresponding sliding groove in a sliding mode, spline sleeves are rotatably installed on the movable seats, and column bodies are arranged in the spline sleeves; a top plate penetrates through the support, and a pressing block is arranged at the lower end of the top plate. According to the cable pulling device for butt joint of the power cable, the column body on one side is rotated, the round rod is inserted into the limiting hole, when the column body on one side rotates, transmission can be conducted to the column body on the other side through the round rod, the column bodies on the two sides drive the cable to move towards one side in the rotating process, and the cable is pulled out under the action of pulling force; the pull-out length of the cable is controlled by controlling the rotation angle of the column body, and the problem that cable materials are wasted due to the fact that the cable is pulled out by redundant length is avoided by controlling the pull-out length of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable operations, and in particular to a wire pulling device for connecting power cables. Background Art

[0002] Power cables, usually referred to as power cables, refer to wires and cables used to transmit electrical energy. Power cables are mainly composed of conductors, insulating materials and sheaths. The conductor is responsible for transmitting current and is the core part of the power cable; the insulating material is wrapped around the conductor to prevent current leakage and short circuit; the sheath covers the outside of the insulating material, providing mechanical protection and weather resistance, ensuring that the power cable can operate stably in various environments.

[0003] The existing publication number is CN207303863U, which is an electric cable docking and pulling device. Specifically, a transmission cylinder is placed on a main shell, a driving cavity is built in the main shell, a sliding groove is opened on one side of the transmission cylinder, a fixed block is placed on the main shell and is located on one side of the transmission cylinder, a clamping groove is opened on the fixed block, one end of the sliding block passes through the sliding groove and is placed in the transmission cylinder, the sliding block is located directly above the fixed block, a clamping groove is opened on the sliding block, a pressure plate is placed in the clamping groove, one end of the clamping screw is placed on the pressure plate, a hook is placed on the bottom of the main shell, and one end of the drive shaft passes through the main shell and is built in the driving cavity.

[0004] However, the existing power cable joint pulling device is a device used to assist in the pulling and connecting of two sections of cables. During the pulling and connecting process, the wires need to be tightened and cannot be easily loosened. Once too much wire is pulled, the two joints will be staggered by a large distance, and chain hinge pliers need to be used to cut off the excess parts before jointing, resulting in a waste of materials. Therefore, we have made improvements on this and proposed a power cable joint pulling device. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the current power cable docking and pulling device is inconvenient to control the cable pulling length during the pulling process, resulting in excessive pulling length and waste of cable materials.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following power cable docking and pulling device to solve the above-mentioned problem.

[0007] The specific application is as follows:

[0008] A device for connecting and pulling power cables comprises a machine base, wherein the machine base is provided with two slide grooves arranged at intervals, and two movable seats are arranged on one side of the machine base. One end of the movable seat is slidably arranged in the slide groove, and a spline sleeve is rotatably installed on each of the movable seats. A column is arranged in each of the spline sleeves, and the columns on both sides are arranged opposite to each other. A spline is arranged outside the column, and the column cooperates with the spline of the spline sleeve, and both ends of the column extend outside the spline sleeve.

[0009] A bracket is fixedly installed on the machine base, and a top plate passes through the bracket. The top plate can slide horizontally. A pressure block is provided at the lower end of the top plate, and the pressure block is located at the upper ends of the two columns. Two spring telescopic rods are fixedly installed on the top plate at intervals, and the movable ends of the spring telescopic rods are fixedly connected to the top of the pressure block.

[0010] As a preferred technical solution of the present application, a roller is rotatably mounted on the machine base, and two spaced-apart baffles are fixedly mounted on the roller.

[0011] As a preferred technical solution of the present application, the surfaces of the opposite ends of the two cylinders are provided with a number of evenly distributed anti-slip patterns, and the anti-slip patterns are distributed along the cylinders. The end of the cylinder on one side is provided with a plurality of equally distributed limiting holes, and the end of the cylinder on the other side is fixedly installed with a plurality of round rods, and the round rods are respectively inserted into the limiting holes.

[0012] As a preferred technical solution of the present application, a cavity is opened inside the column, and a limiting mechanism is arranged on the column. The limiting mechanism extends into the cavity, and the limiting mechanisms on both sides are symmetrically arranged.

[0013] As a preferred technical solution of the present application, the limiting mechanism includes a plurality of blocks arranged outside the column, and the plurality of blocks are distributed in a circular array with the column as the center, and a guide rod is fixedly installed on the block, one end of the guide rod passes through the column and is inserted into the cavity, and a block is fixedly installed on the end of the guide rod, and the block is located in the cavity.

[0014] As a preferred technical solution of the present application, the block is fixedly connected to one side of the column with two elastic members arranged at intervals, and the other ends of the elastic members are fixedly connected to the surface of the column. The block is configured as a magnet, and a plurality of electromagnets are fixedly installed outside the column, and the electromagnets are respectively arranged toward the block.

[0015] As a preferred technical solution of the present application, a translation mechanism is provided on the movable seat, the translation mechanisms on both sides are symmetrically distributed, the translation mechanism is connected to the column, and the translation mechanism can drive the column to move.

[0016] As a preferred technical solution of the present application, the translation mechanism includes an electric push rod, which is fixedly mounted on the movable seat. A connecting rod is fixedly mounted on the output end of the electric push rod, one end of the connecting rod is connected to the column, and the connecting rod is rotatably mounted at the center of the end of the column.

[0017] As a preferred technical solution of the present application, the cross-section of the block is set to be triangular, the end of the block is provided with a blade, the spline sleeve is fixedly mounted with a gear ring, the movable seat is rotatably mounted with a rotating shaft, the rotating shaft is fixedly mounted with a driving wheel, and the driving wheel is meshed with the gear ring on the same side thereof.

[0018] As a preferred technical solution of the present application, the movable seat is provided with two rows of equally spaced first sockets, and two spaced first pins are provided above the movable seat. The two first pins pass through the base and are respectively inserted into two adjacent first sockets. The top plate is provided with a plurality of equally spaced second sockets, and the bracket is provided with a second pin, and the lower end of the second pin is inserted into the second socket.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the scheme of this application:

[0021] 1. This kind of cable pulling device for connecting power cables, by rotating the cylinder on one side, inserting the round rod into the limiting hole, when the cylinder on one side rotates, it can be transmitted to the cylinder on the other side through the round rod, and the cylinders on both sides drive the cable to move to one side during the rotation process, and the cable is pulled out under the action of the pulling force, and the pull-out length of the cable is controlled by controlling the rotation angle of the cylinder, and by controlling the pull-out length of the cable, the problem of wasting cable materials due to pulling out excess length of the cable is avoided;

[0022] 2. This kind of cable pulling device for connecting power cables drives the connecting rod to move through the electric push rod, and the connecting rod drives the column to move synchronously. The column moves in the spline sleeve. The moving directions of the electric push rods on both sides are opposite and the moving distances are consistent, which can drive the two columns to move synchronously, thereby driving the cables on the device to move synchronously, so that the cables at both ends are in the same straight line, avoiding cable misalignment, and bringing convenience to the subsequent connection operation;

[0023] 3. This kind of cable pulling device for power cable docking inserts the docking end of the cable into the cavity, and the blade on the block cuts into the skin, driving the block in the column to rotate. The blade on the block cuts the skin of the cable in a circular manner, and then the electric push rod drives the column to move. The blade rotates around the cable and moves along the cable, and a spiral cutting line can be cut on the cable surface. The device can assist in the cable stripping work and simplify the overall operation process of cable docking. The operator does not need to use additional stripping tools, thereby reducing the operation steps and time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of the power cable docking and pulling device provided in this application;

[0025] Figure 2 The working diagram of the power cable docking and pulling device provided in this application is as follows: Figure 1 ;

[0026] Figure 3 A front view of the power cable docking and pulling device provided in this application;

[0027] Figure 4 This is an enlarged schematic diagram of a portion of the structure of the power cable docking and pulling device provided in this application;

[0028] Figure 5 A partial enlarged schematic diagram of the structure of the column of the power cable docking and pulling device provided in this application Figure 1 ;

[0029] Figure 6 A partial enlarged schematic diagram of the structure of the column of the power cable docking and pulling device provided in this application Figure 2 ;

[0030] Figure 7 An enlarged cross-sectional view of a portion of the structure of the column of the power cable docking and pulling device provided in the present application;

[0031] Figure 8 This is an enlarged schematic diagram of the internal structure of a column for a power cable docking and pulling device provided in the present application;

[0032] Fig. 9 This is an enlarged schematic diagram of a portion of the structure of the spline sleeve of the power cable docking and pulling device provided in the present application;

[0033] Fig.10 This is an enlarged schematic diagram of a portion of the structure of the stopper of the power cable docking and pulling device provided in the present application;

[0034] Fig.11 The working diagram of the power cable docking and pulling device provided in this application is as follows: Figure 2 ;

[0035] Fig.12 A schematic diagram of the stripping state of the cable used in the power cable docking and pulling device provided in this application;

[0036] Fig.13 The working diagram of the power cable docking and pulling device provided in this application is as follows: Figure 3 .

[0037] Indicated in the figure:

[0038] 1. Machine base; 2. Slide groove; 3. Movable seat; 4. Spline sleeve; 5. Cylinder; 6. Spline; 7. Bracket; 8. Top plate; 9. Pressure block; 10. Spring telescopic rod; 11. Support roller; 12. Baffle plate; 13. Anti-skid pattern; 14. Limit hole; 15. Round rod; 16. Cavity; 17. Baffle; 18. Guide rod; 19. Block; 20. Elastic part; 21. Electromagnet; 22. Electric push rod; 23. Connecting rod; 24. Blade; 25. Gear ring; 26. Rotating shaft; 27. Driving wheel; 28. First socket; 29. ​​First latch; 30. Second socket; 31. Second latch; 32. Cable; 33. Spiral cutting line; 34. Annular cutting line. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0040] Example 1

[0041] Please refer to Figure 1-9A device for connecting and pulling power cables, comprising a base 1, on which two interval-set slide grooves 2 are provided, two movable seats 3 are provided on one side of the base 1, one end of the movable seat 3 is slidably set in the slide groove 2, and a spline sleeve 4 is rotatably installed on the movable seat 3, and a column 5 is provided in the spline sleeve 4. The columns 5 on both sides are arranged oppositely, and a spline 6 is provided outside the column 5. The column 5 and the spline sleeve 4 are spline-matched, and both ends of the column 5 extend to the outside of the spline sleeve 4. A bracket 7 is fixedly installed on the base 1, and a top plate 8 is passed through the bracket 7. The top plate 8 can slide horizontally, and a pressure block 9 is provided at the lower end of the top plate 8. The pressure block 9 is located at the upper ends of the two columns 5. Two interval-set spring telescopic rods 10 are fixedly installed on the top plate 8, and the movable ends of the spring telescopic rod 10 are fixedly connected to the top of the pressure block 9. A roller 11 is rotatably installed on the base 1, and two interval-set baffles 12 are fixedly installed on the roller 11. The surfaces of the opposite ends of the two columns 5 are provided with a number of evenly distributed anti-slip grooves 13, which are distributed along the columns 5. The end of the column 5 on one side is provided with a number of evenly distributed limiting holes 14, and the end of the column 5 on the other side is fixedly installed with a number of round rods 15, which are respectively inserted into the limiting holes 14.

[0042] Working principle: Place the cable 32 between the column 5 and the pressure block 9 (refer to Figure 2 and Fig.11 As shown), the spring telescopic rod 10 drives the pressing block 9 to press the cable 32 downward. There is sufficient friction between the column 5 and the cable 32. The anti-slip groove 13 is set on the surface of the column 5 to increase the friction between the column 5 and the cable 32. The cable 32 passes through two baffles 12 and is placed on the roller 11, thereby supporting the cable 32 and keeping the cable 32 straight. After that, by rotating the column 5 on one side, the round rod 15 is inserted into the limiting hole 14. When the column 5 on one side rotates, it can be transmitted to the column 5 on the other side through the round rod 15. The columns 5 on both sides drive the cable 32 to move to one side during the rotation process. The cable 32 is pulled out under the action of the pulling force. The pull-out length of the cable 32 is controlled by controlling the rotation angle of the column 5. By controlling the pull-out length of the cable 32, the problem of wasting the cable 32 material due to pulling out excess length of the cable 32 is avoided.

[0043] Example 2

[0044] The power cable docking and pulling device provided in Example 1 is further optimized. Specifically, Figure 5-11As shown, when the pressing block 9 cooperates with the column 5 to squeeze the cable 32, the cable 32 may slide out from both sides, resulting in the interruption of the wire pulling work and reducing the work efficiency. A cavity 16 is provided inside the column 5, and a limiting mechanism is provided on the column 5. The limiting mechanism extends into the cavity 16, and the limiting mechanisms on both sides are symmetrically arranged. The limiting mechanism includes a plurality of blocks 17 arranged outside the column 5, and the plurality of blocks 17 are distributed in a circular array with the column 5 as the center. A guide rod 18 is fixedly installed on the block 17, and one end of the guide rod 18 passes through the column 5 and is inserted into the cavity 16. A block 19 is fixedly installed at the end of the guide rod 18, and the block 19 is located in the cavity 16. The block 17 is fixedly connected to one side of the column 5 with two elastic members 20 arranged at intervals, and the other end of the elastic member 20 is fixedly connected to the surface of the column 5. The block 17 is set as a magnet, and a plurality of electromagnets 21 are fixedly installed outside the column 5, and the electromagnets 21 are respectively arranged toward the block 17.

[0045] By arranging a plurality of stoppers 17 on the outside of the column 5, the stoppers 17 on both sides can limit the position of the cable 32 therebetween, and when the pressing block 9 cooperates with the column 5 to squeeze the cable 32, the cable 32 is prevented from slipping out from both sides. Fig.13 As shown in the figure, the spring telescopic rod 10 is retractable, and the distance between the pressing block 9 and the column 5 is adjustable, so as to match the specifications and shapes of the double-strand cable 32. At the same time, the stopper 17 can move along the radial direction of the column 5, so as to limit the two sides of the double-strand cable 32 by adjusting the position of the stopper 17. Specifically, by energizing the electromagnet 21, the electromagnet 21 applies a repulsive force to the stopper 17, and the stopper 17 moves along the radial direction of the column 5, so that the device can pull the cables 32 of different specifications.

[0046] After the wire pulling operation, the joints of the cables 32 at both ends need to be butt-jointed (such as Figure 2 As shown in FIG. 1 , considering that the cables 32 at both ends are misaligned, the misalignment of the cables 32 at both ends will cause inconvenience to the docking operation, such as Figure 6 As shown, the movable seat 3 is provided with a translation mechanism, the translation mechanisms on both sides are symmetrically distributed, the translation mechanism is connected to the column 5, and the translation mechanism can drive the column 5 to move. The translation mechanism includes an electric push rod 22, the electric push rod 22 is fixedly mounted on the movable seat 3, and a connecting rod 23 is fixedly mounted on the output end of the electric push rod 22, one end of the connecting rod 23 is connected to the column 5, and the connecting rod 23 is rotatably mounted at the center of the end of the column 5.

[0047] The electric push rod 22 drives the connecting rod 23 to move, and the connecting rod 23 drives the column 5 to move synchronously. The column 5 moves in the spline sleeve 4. The moving directions of the electric push rods 22 on both sides are opposite and the moving distances are consistent, which can drive the two columns 5 to move synchronously, thereby driving the cables 32 on the device to move synchronously, so that the cables 32 at both ends are in the same straight line, avoiding the misalignment of the cables 32, and bringing convenience to the subsequent docking operation.

[0048] Among them, Figure 6-10 As shown, the cross section of the block 19 is set to be triangular, and the end of the block 19 is provided with a blade 24 (such as Fig.10 As shown), a gear ring 25 is fixedly mounted on the spline sleeve 4, a rotating shaft 26 is rotatably mounted on the movable seat 3, a driving wheel 27 is fixedly mounted on the rotating shaft 26, and the driving wheel 27 is meshed with the gear ring 25 on the same side thereof.

[0049] After the wire pulling operation is completed, the cables 32 at both ends need to be docked, and the insulation skin at the ends of the cables 32 needs to be stripped first. The movable seat 3 is removed from the device by disassembling the first latch 29, and the movable seat 3 is separated to carry out subsequent work. Then the docking end of the cable 32 is inserted into the cavity 16 in the column 5. By energizing the electromagnet 21, the electromagnet 21 applies attraction to the block 17, and the block 17, the guide rod 18 and the block 19 move synchronously. The elastic member 20 is compressed, and the blade 24 on the block 19 moves toward the cable 32 and cuts into the skin. Then, the shaft 26 is rotated, the driving wheel 27 rotates and drives the gear ring 25 to rotate. The gear ring 25 rotates synchronously with the spline sleeve 4, and the spline sleeve 4 drives the column 5 to rotate. The block 19 in the column 5 rotates synchronously with the column 5. The blade 24 on the block 19 performs a circular cut on the skin of the cable 32, and a circular cutting line 34 is cut on the cable 32 (refer to Fig.12 ), then the shaft 26 keeps rotating, and the electric push rod 22 drives the column 5 to move, the blade 24 rotates around the cable 32 and moves along the cable 32, and a spiral cutting line 33 can be cut on the surface of the cable 32. The electromagnet 21 is powered off, and the elastic force of the elastic member 20 drives the block 17 to reset, and the blade 24 on the block 19 is also separated from the cable 32, so that the cable 32 in the column 5 can be taken out. When stripping the wire, the outer skin of the cable 32 is stripped by one end of the spiral cutting line 33, and when the wire is stripped to the annular cutting line 34, the outer skin of the cable 32 is separated from the cable 32. The number of teeth of the driving wheel 27 is less than the number of teeth of the gear ring 25, and the driving wheel 27 is reduced to the gear ring 25. When the rotating shaft 26 drives the column 5 to rotate, it is convenient to control the rotation speed of the column 5 and the block 19 therein. The device can assist in the stripping of the cable 32, simplifying the overall operation process of the cable 32 docking. Operators do not need to use additional peeling tools, thereby reducing operation steps and time and improving work efficiency.

[0050] Among them, Figure 1-4As shown, the movable seat 3 is provided with two rows of equally spaced first sockets 28, and two spaced first pins 29 are provided above the movable seat 3. The two first pins 29 penetrate the base 1 and are respectively inserted into two adjacent first sockets 28. The top plate 8 is provided with a plurality of equally spaced second sockets 30, and the bracket 7 is provided with a second pin 31, and the lower end of the second pin 31 is inserted into the second socket 30.

[0051] refer to Figure 2 As shown, after the cable 32 at one end is pulled, if it is necessary to pull the cable 32 at the other end, by removing the first pin 29 and the second pin 31, the movable seat 3 and the top plate 8 can be moved toward the cable 32 at the other end, thereby moving the column 5 and the pressing block 9 to the cable 32 at the other end, and then the movable seat 3 and the top plate 8 are limited and fixed by the first pin 29 and the second pin 31, and then the cable 32 at the other end is pulled, without the need to repeatedly move the device, the operation is simplified, and the working efficiency is improved.

[0052] Overall working principle:

[0053] The cable 32 is placed between the column 5 and the pressing block 9, and the pressing block 9 is driven by the spring telescopic rod 10 to press the cable 32 downward. There is sufficient friction between the column 5 and the cable 32. The anti-slip groove 13 is set on the surface of the column 5 to increase the friction between the column 5 and the cable 32. The cable 32 passes through two baffles 12 and is placed on the roller 11, thereby supporting the cable 32 and keeping the cable 32 straight. After that, by rotating the column 5 on one side, the round rod 15 is inserted into the limiting hole 14. When the column 5 on one side rotates, it can be transmitted to the column 5 on the other side through the round rod 15. The columns 5 on both sides drive the cable 32 to move to one side during the rotation process. The cable 32 is pulled out under the action of the pulling force. The pull-out length of the cable 32 is controlled by controlling the rotation angle of the column 5. By controlling the pull-out length of the cable 32, the problem of wasting the cable 32 material due to pulling out excess length of the cable 32 is avoided. By arranging a plurality of stoppers 17 on the outside of the column 5, the stoppers 17 on both sides can limit the position of the cable 32 therebetween, and when the pressing block 9 cooperates with the column 5 to squeeze the cable 32, the cable 32 is prevented from sliding out from both sides. After the cable 32 at one end is pulled, if the cable 32 at the other end needs to be pulled, the movable seat 3 and the top plate 8 can be moved toward the cable 32 at the other end by removing the first latch 29 and the second latch 31, so that the column 5 and the pressing block 9 are moved to the cable 32 at the other end, and then the movable seat 3 and the top plate 8 are limited and fixed by the first latch 29 and the second latch 31, and then the cable 32 at the other end is pulled.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A wire pulling device for connecting power cables, characterized in that: The machine base (1) comprises two slide grooves (2) arranged at intervals on the machine base (1), two movable seats (3) are arranged on one side of the machine base (1), one end of the movable seat (3) is slidably arranged in the slide groove (2), a spline sleeve (4) is rotatably mounted on the movable seat (3), a column (5) is arranged in the spline sleeve (4), the columns (5) on both sides are arranged opposite to each other, a spline (6) is arranged outside the column (5), the column (5) and the spline sleeve (4) are spline-matched, and both ends of the column (5) extend to the outside of the spline sleeve (4); A bracket (7) is fixedly mounted on the machine base (1), a top plate (8) passes through the bracket (7), the top plate (8) can slide horizontally, a pressing block (9) is provided at the lower end of the top plate (8), the pressing block (9) is located at the upper ends of the two columns (5), and two spring telescopic rods (10) arranged at intervals are fixedly mounted on the top plate (8), and the movable ends of the spring telescopic rods (10) are fixedly connected to the top of the pressing block (9).

2. A wire pulling device for connecting power cables according to claim 1, characterized in that: A roller (11) is rotatably mounted on the machine base (1), and two spaced-apart blocking pieces (12) are fixedly mounted on the roller (11).

3. The cable pulling device for connecting power cables according to claim 1, characterized in that: The surfaces of the opposite ends of the two columns (5) are each provided with a plurality of evenly distributed anti-skid patterns (13), the anti-skid patterns (13) being distributed along the columns (5), the end of the column (5) on one side being provided with a plurality of equally distributed limiting holes (14), the end of the column (5) on the other side being fixedly provided with a plurality of round rods (15), the round rods (15) being respectively inserted into the limiting holes (14).

4. A wire pulling device for connecting power cables according to claim 3, characterized in that: A cavity (16) is provided inside the column (5), and a limiting mechanism is provided on the column (5). The limiting mechanism extends into the cavity (16), and the limiting mechanisms on both sides are symmetrically arranged.

5. The cable pulling device for connecting power cables according to claim 4, characterized in that: The limiting mechanism comprises a plurality of stoppers (17) arranged outside the column (5), the plurality of stoppers (17) being distributed in a circular array with the column (5) as the center, a guide rod (18) being fixedly mounted on each of the stoppers (17), one end of the guide rod (18) passing through the column (5) and inserted into the cavity (16), a block (19) being fixedly mounted on each end of the guide rod (18), and the block (19) being located in the cavity (16).

6. A wire pulling device for connecting power cables according to claim 5, characterized in that: The stopper (17) is fixedly connected to one side of the column (5) with two elastic members (20) arranged at intervals, and the other ends of the elastic members (20) are fixedly connected to the surface of the column (5). The stopper (17) is configured as a magnet, and a plurality of electromagnets (21) are fixedly installed outside the column (5), and the electromagnets (21) are respectively arranged toward the stopper (17).

7. The cable pulling device for connecting power cables according to claim 5, characterized in that: The movable seat (3) is provided with a translation mechanism, the translation mechanisms on both sides are symmetrically distributed, the translation mechanism is connected to the column (5), and the translation mechanism can drive the column (5) to move.

8. The cable pulling device for connecting power cables according to claim 7, characterized in that: The translation mechanism comprises an electric push rod (22), the electric push rod (22) is fixedly mounted on the movable seat (3), a connecting rod (23) is fixedly mounted on the output end of the electric push rod (22), one end of the connecting rod (23) is connected to the column (5), and the connecting rod (23) is rotatably mounted at the center of the end of the column (5).

9. The cable pulling device for connecting power cables according to claim 8, characterized in that: The cross section of the block (19) is arranged in a triangular shape, a blade (24) is arranged at the end of the block (19), a gear ring (25) is fixedly mounted on the spline sleeve (4), a rotating shaft (26) is rotatably mounted on the movable seat (3), a driving wheel (27) is fixedly mounted on the rotating shaft (26), and the driving wheel (27) is meshed with the gear ring (25) on the same side thereof.

10. The cable pulling device for connecting power cables according to claim 9, characterized in that: The movable seat (3) is provided with two rows of first plug holes (28) which are equidistantly distributed. Two first plug pins (29) which are spaced apart are provided above the movable seat (3). The two first plug pins (29) penetrate the machine base (1) and are respectively inserted into two adjacent first plug holes (28). The top plate (8) is provided with a plurality of second plug holes (30) which are equidistantly distributed. The bracket (7) is inserted with a second plug pin (31), and the lower end of the second plug pin (31) is inserted into the second plug hole (30).

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