An electric tensioner for overhead transmission lines

Abstract

The present invention discloses an electric tensioner for overhead transmission lines, which relates to the technical field of overhead transmission line installation. It includes a frame, and also includes a rotating shaft rotatably installed on the frame. A driven wheel is fixedly installed on the rotating shaft. A driving wheel is rotatably installed on the frame, and the driving wheel is driven to rotate through a driving gear. A housing is fixedly installed on the frame, and two groups of cooperating resistance components are installed in the housing. The resistance component includes a water pipe fixedly installed in the housing, and a rotating ring is rotatably installed on the water pipe. The advantages are as follows: When adjusting the tension of the transmission line in the present invention, the resistance generated by the flowing water in the valve body is used to organize the rotation of the valve body, so as to form a resistance to the rotating shaft. Less mechanical wear is generated in this process, making the resistance persistent and the service life longer. At the same time, the smaller wear makes the resistance adjustment more accurate, so as to better control the tension of the transmission line.

Description

Technical Field

[0001] The present invention relates to the technical field of overhead transmission line installation, and particularly to an electric tensioner for overhead transmission lines. Background Art

[0002] Overhead transmission lines mainly refer to overhead open wires erected above the ground. They are transmission lines that use insulators to fix the transmission wires on poles standing upright on the ground to transmit electric energy. Overhead transmission lines need to ensure that the tension of the transmission wires is controlled within a certain range to avoid line collapse. Therefore, when installing transmission wires, an electric tensioner is required to adjust the tension of the transmission wires.

[0003] There are various existing electric tensioners. Among them, the double-wheel electric tensioner is the most commonly used electric tensioner, which includes a driving wheel and a driven wheel, and changes the tension by adjusting the rotation speed. The publication number CN116462051A discloses an electric tensioner device with adaptive tension control, which includes a support component for installing and supporting each component. The support component is fixed at the working position through the provided support blocks. An adjustment component for adjusting the tension of the tensioner is arranged on the support component, and a control component for controlling the adjustment component according to the wire state is arranged on the adjustment component.

[0004] The above-mentioned tensioner automatically adjusts the tension of the tensioner according to the wire state, improves the speed of tension adjustment, avoids damage, slack or breakage of the wire during erection, and improves the safety and efficiency of construction.

[0005] The driven wheel in the above-mentioned tensioner and existing tensioners is driven by the friction between the transmission wire and the driven wheel. Due to the heavy weight of the driven wheel, there is a certain amount of inertia when rotating at high speed. When the driving wheel stops, the driven wheel will continue to rotate under the action of its own inertia, which will cause the transmission wire to wind. Therefore, in existing and the above-mentioned tension meters, a damper is arranged on the rotating shaft of the driven wheel to increase the friction between the rotating shaft and the frame, thereby offsetting the inertia, which can effectively prevent the situation that the driven wheel continues to rotate due to inertia. However, the arranged damper is a friction damper, and long-term use will cause wear of the damper, resulting in a decrease in the accuracy of the damper resistance adjustment and affecting the tension adjustment.

[0006] Therefore, a new type of electric tensioner for overhead transmission lines can be adopted to solve the deficiencies of the existing technology. Summary of the Invention

[0007] The purpose of the present invention is to solve the problem in the existing technology that mechanical damping wear causes inaccurate damping adjustment, thereby affecting the tension adjustment of the transmission wire, and to propose an electric tensioner for overhead transmission lines.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] An overhead transmission line electric tensioner, including a frame, further includes a rotating shaft rotatably installed on the frame. A driven wheel is fixedly installed on the rotating shaft. A driving wheel is rotatably installed on the frame, and the driving wheel is driven to rotate through a driving gear.

[0010] A housing is fixedly installed on the frame. Two sets of cooperating resistance components are installed inside the housing. The resistance component includes a water pipe fixedly installed inside the housing. A rotating ring is rotatably installed on the water pipe. An installation ring is fixedly installed on the rotating shaft. The installation ring is fixedly connected to the rotating ring. A sealing mechanism cooperating with the two water pipes is installed on the housing.

[0011] A valve body is fixedly installed on the rotating ring. A rotating shaft is rotatably installed inside the valve body. A rotating ball cooperating with the valve body is fixedly installed on the rotating shaft. A driving mechanism and a locking mechanism cooperating with the rotating shaft are installed inside the housing. Two electromagnetic rings are fixedly installed on the housing.

[0012] Preferably, a control cabinet is fixedly installed on the frame for automatically controlling the operation of electrical components in the tensioner. A protective cover and a heat dissipation cabinet are fixedly installed on the frame. The protective cover is located outside the housing, and the heat dissipation cabinet is used for dissipating heat from the housing.

[0013] Preferably, a pay-off guide cooperating with the driven wheel is slidably installed on the frame, and a take-up guide cooperating with the driving wheel is slidably installed on the frame for guiding the transmission line to ensure that the transmission line fits with the driving wheel and the driven wheel.

[0014] Preferably, the sealing mechanism includes connection boxes fixedly installed on the corresponding water pipes. The two connection boxes are in opposite directions. Through holes cooperating with the corresponding connection boxes are opened on the two water pipes. A sealing plate cooperating with the corresponding water pipe is slidably installed in each of the two connection boxes. The two sealing plates are on the same horizontal line. A moving structure is installed between the housing and the two sealing plates.

[0015] Preferably, the moving structure includes connection frames fixedly installed on the corresponding sealing plates. Slots cooperating with the corresponding connection frames are opened on the two connection boxes. A first rack is fixedly installed between the two connection frames. A first motor is fixedly installed on the housing. A first gear disk meshing with the first rack is fixedly installed on the driving end of the first motor.

[0016] Preferably, the driving mechanism includes a fixing frame fixedly installed on the rotating ring. A second rack is slidably installed on the fixing frame. A return spring is fixedly installed between the second rack and the fixing frame. A first magnetic block cooperating with the corresponding electromagnetic ring is installed on the second rack through a delay structure. A second gear disc meshing with the second rack is fixedly installed on the rotating shaft.

[0017] Preferably, the delay structure includes a plate body fixedly installed on the second rack. A plurality of delay springs are fixedly installed on the plate body. One end of each of the plurality of delay springs away from the plate body is fixedly connected to the first magnetic block. A telescopic rod is fixedly installed on the plate body. The telescopic end of the telescopic rod is fixedly connected to the first magnetic block.

[0018] Preferably, the locking mechanism includes a friction ring fixedly installed on the rotating shaft. A fixing block is fixedly installed on the rotating ring. Two elastic telescopic rods are fixedly installed on the fixing block. A connecting block is fixedly installed at the telescopic ends of the two elastic telescopic rods. Two groups of pulling rods are rotatably installed on the connecting block through a shaft body. Each group of pulling rods consists of two pull rods. A friction plate cooperating with the friction ring is installed between the two groups of pulling rods. The friction plate is rotatably connected to each pull rod. A limiting structure cooperating with the shaft body is installed on the fixing block. A loosening structure cooperating with the connecting block is installed on the fixing block.

[0019] Preferably, the limiting structure includes a slide rail fixedly installed on the fixing block. A sliding block is slidably installed on the slide rail. The sliding block is rotatably connected to the shaft body.

[0020] Preferably, the loosening structure includes two rollers. The two rollers are respectively rotatably installed on the fixing block and the connecting block. A connecting rod is slidably installed on the fixing block. A second magnetic block cooperating with the corresponding electromagnetic ring is fixedly installed on the connecting rod. Two wedge blocks cooperating with the two rollers are fixedly installed at the end of the connecting rod away from the second magnetic block.

[0021] Compared with the existing technology, the advantages of the present invention are as follows:

[0022] 1. When the tension of the transmission line is adjusted by this tensioning machine, the water passing rate of the valve body is controlled by adjusting the angle of the rotating ball in the valve body. The valve body rotates along with the rotating shaft. The valve body rotates in the water pipe. The water in the water pipe will generate resistance to the valve body. The change of the water passing rate changes the resistance size, so as to prevent the rotation of the rotating shaft by resistance. This resistance is the resistance between the water and the valve body, so there will be no large mechanical rotational friction. This kind of resistance adjustment has a longer service life and stable adjustment accuracy.

[0023] 2. When adjusting the tension of the transmission line, this tension machine blocks the water in the water pipe by setting a blocking mechanism to prevent the water in the water pipe from rotating driven by the rotation of the valve body, ensuring that the water always generates resistance to the valve body. At the same time, it can also effectively reduce the probability of water turbulence in the water pipe, making the water flow through the valve body more stable, thus making the resistance adjustment more accurate.

[0024] 3. When adjusting the tension of the transmission line, this tension machine drives the rotating ball to rotate by setting an electromagnetic ring and a first magnetic block to control the water flow rate in the rotating ball. Then, a locking mechanism is used to lock the rotating ball, and under the action of a delay structure, the locking mechanism operates before the driving mechanism, so that the locking mechanism locks the rotating ball every time the rotating ball rotates, improving the stability of the rotating ball during operation, thereby improving the stability of the flow rate and improving the accuracy of the resistance adjustment.

[0025] In summary, when adjusting the tension of the transmission line, this invention uses the resistance generated by the water flow in the valve body to block the rotation of the valve body, thereby forming resistance to the rotating shaft. During this process, less mechanical wear occurs, making the resistance persistent and the service life longer. At the same time, the smaller wear makes the resistance adjustment more accurate, so as to better control the tension of the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following further elaborates on the specific implementation manners of this invention with reference to the drawings, where:

[0027] Figure 1 is a schematic structural diagram of an electric tension machine for an overhead transmission line proposed by this invention;

[0028] Figure 2 is Figure 1 a detailed schematic structural diagram after rotating a certain angle;

[0029] Figure 3 is Figure 2 a detailed schematic structural diagram after rotating a certain angle;

[0030] Figure 4 is Figure 3 a detailed enlarged schematic structural diagram of the driven wheel in

[0031] Figure 5 is Figure 4 a detailed schematic structural diagram after rotating a certain angle;

[0032] Figure 6 is Figure 5 a detailed schematic structural diagram after removing the driven wheel and the cover in

[0033] Figure 7 is Figure 6Schematic detailed drawing of the structure after removing the outer shell 11 and rotating it by a certain angle;

[0034] Figure 8 For Figure 7 Schematic detailed drawing of the planar structure along one of the angles;

[0035] Figure 9 For Figure 8 Schematic three - dimensional structure detailed drawing of the middle water pipe after being cut along A - A and rotated by a certain angle;

[0036] Figure 10 For Figure 9 Schematic enlarged structure detailed drawing of the middle plugging mechanism;

[0037] Figure 11 For Figure 9 Schematic enlarged structure detailed drawing of the cut - open water pipe, rotating ring and mounting ring in the middle;

[0038] Figure 12 For Figure 9 Schematic enlarged structure detailed drawing of the middle after removing the rotating shaft, plugging mechanism and water pipe;

[0039] Figure 13 For Figure 12 Schematic detailed drawing of the structure of one group of resistance components after rotating by a certain angle;

[0040] Figure 14 For Figure 13 Schematic detailed drawing of the structure after removing the valve body and electromagnetic ring and rotating by a certain angle;

[0041] Figure 15 For Figure 14 Schematic enlarged structure detailed drawing of the driving mechanism and rotating shaft in the middle;

[0042] Figure 16 For Figure 15 Schematic enlarged structure detailed drawing of the locking mechanism in the middle;

[0043] Figure 17 For Figure 16 Schematic detailed drawing of the structure after removing the rotating shaft;

[0044] Figure 18 For Figure 17 Schematic enlarged structure detailed drawing of part B in the middle.

[0045] In the figure: 1 frame, 2 driven wheel, 3 driving wheel, 4 winding guide, 5 unwinding guide, 6 control cabinet, 7 heat dissipation cabinet, 8 protective cover, 9 driving gear, 10 rotating shaft, 11 housing, 12 first motor, 13 water pipe, 14 electromagnetic ring, 15 first rack, 16 first toothed disc, 17 rotating ring, 18 connection box, 19 plugging plate, 20 connecting frame, 21 wedge block, 22 mounting ring, 23 valve body, 24 rotating ball, 25 driving mechanism, 26 rotating shaft, 27 second toothed disc, 28 second rack, 29 reset spring, 30 fixing frame, 31 plate body, 32 first magnetic block, 33 delay spring, 34 second magnetic block, 35 friction ring, 36 friction plate, 37 pull rod, 38 connecting rod, 39 fixing block, 40 connecting block, 41 elastic telescopic rod, 42 roller, 43 slide rail, 44 sliding block. Specific embodiments

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Embodiment 1: Refer to Figures 1 - 3 , an electric tensioner for overhead transmission lines, including a frame 1, and further including a rotating shaft 10 rotatably installed on the frame 1. A driven wheel 2 is fixedly installed on the rotating shaft 10, and a driving wheel 3 is rotatably installed on the frame 1. The driving wheel 3 is driven to rotate by a driving gear 9.

[0048] A toothed ring meshing with the driving gear 9 is fixedly installed on the driving wheel 3. A second motor is fixedly installed on the frame 1, and a fixed connection is provided between the driving end of the second motor and the driving gear 9. The rotation of the driving end of the second motor drives the driving gear 9 to rotate, and the driving gear 9 drives the meshing toothed ring to rotate, thereby driving the driving wheel 3 to rotate.

[0049] A control cabinet 6 is fixedly installed on the frame 1 for automatically controlling the operation of electrical components in the tensioner. A protective cover 8 and a heat dissipation cabinet 7 are fixedly installed on the frame 1. The protective cover 8 is located outside the housing 11, and the heat dissipation cabinet 7 is used for dissipating heat from the housing 11.

[0050] An unwinding guide 5 cooperating with the driven wheel 2 is slidably installed on the frame 1, and a winding guide 4 cooperating with the driving wheel 3 is slidably installed on the frame 1 for guiding the transmission line to ensure that the transmission line is in contact with the driving wheel 3 and the driven wheel 2.

[0051] Grooves are provided on the driving wheel 3 and the driven wheel 2, and rubber sheets are fixedly installed in the grooves to increase the friction between the driving wheel 3 and the driven wheel 2 to ensure that the driving wheel 2 can be driven by the transmission line to rotate.

[0052] The rolled transmission line passes through the winding guide 4, then bypasses the driving wheel 3 and the driven wheel 2 and passes through the unwinding guide 5. The end of the transmission line needs to be connected to a traction device to pull the transmission line to move and keep the transmission line tension constant. The traction speed is consistent with the driving speed of the driving wheel 3. The rotation of the driving wheel 3 will drive the driven wheel 2 to rotate through the transmission line. The tension of the transmission line is adjusted by the resistance between the driven wheel 2 and the frame 1. The faster the speed of the driving wheel 3, the greater the tension, and vice versa.

[0053] Embodiment 2: This embodiment is different from the embodiment 1 in that: Figure 1 , Figures 4 - 13 A shell 11 is fixedly mounted on the frame 1, and two sets of resistance components that cooperate with each other are installed in the shell 11. The resistance components include a water pipe 13 fixedly mounted in the shell 11, a rotating ring 17 is rotatably mounted on the water pipe 13, a mounting ring 22 is fixedly mounted on the rotating shaft 10, and the mounting ring 22 is fixedly connected to the rotating ring 17. A blocking mechanism that cooperates with the two water pipes 13 is installed on the shell 11, and a valve body 23 is fixedly mounted on the rotating ring 17.

[0054] The rotation of the driven wheel 2 drives the rotating shaft 10 to rotate. The rotation of the rotating shaft 10 drives the rotating ring 17 to rotate through the mounting ring 22. The rotation of the rotating ring 17 drives the valve body 23 fixedly connected thereto to rotate in the water pipe 13. The water in the water pipe 13 generates resistance to the valve body 23, so that the rotating shaft 10 forms a damping to offset the inertia of the rotation of the driven wheel 2.

[0055] Since the water pipe 13 is annular, the rotation of the valve body 23 in the water pipe 13 will drive the water in the water pipe 13 to rotate. When the valve body 23 just starts to rotate, the water in the water pipe 13 is stationary, so the resistance to the valve body 23 is the largest. As the valve body 23 continues to rotate, the water in the water pipe 13 will be driven to rotate together with the valve body 23. At this time, the resistance generated by the water to the valve body 23 gradually decreases until the rotation speed of the valve body 23 is consistent with that of the water, and the resistance is reduced to zero. In order to prevent the water from rotating with the valve body 23, two sets of resistance components are used here to cooperate and operate intermittently to maintain the stability of the water in the water pipe 13.

[0056] The sealing mechanism includes a connection box 18 fixedly installed on the corresponding water pipe 13, the two connection boxes 18 are in opposite directions, and the two water pipes 13 are provided with a through hole that matches the corresponding connection box 18. A sealing plate 19 that matches the corresponding water pipe 13 is slidably installed in the two connection boxes 18. The two sealing plates 19 are located on the same horizontal line, and a movable structure is installed between the outer shell 11 and the two sealing plates 19.

[0057] As Figure 12 shown, the radian between the upper part of the valve body 23 on the two resistance components and the center point of the mounting ring 22 is less than 180 degrees. The purpose of this design is that when the upper part of the valve body 23 on the left side (the valve body 23 marked with 23 in Figure 12 is about to closely adhere to its corresponding blocking plate 19, the upper part of the valve body 23 on the right side just exceeds the position of its corresponding blocking plate 19.

[0058] Specific operation: When the left blocking plate 19 blocks the corresponding water pipe 13, at this time, the valve body 23 on the left side is located above the left blocking plate 19, while the right blocking plate 19 retracts into the corresponding connection box 18. The water in the other water pipe 13 without the block of the blocking plate 19 will rotate along with the rotation of the valve body 23, and the left blocking plate 19 will prevent the water in the corresponding water pipe 13 from rotating together with the valve body 23. At this time, the valve body 23 on the left side plays a role in generating resistance;

[0059] When the valve body 23 on the left side rotates one circle and collides with the corresponding blocking plate 19, when they are about to collide, at this time, the left blocking plate 19 retracts into the corresponding connection box 18, and the valve body 23 on the right side just exceeds the position of the corresponding blocking plate 19. At this time, the right blocking plate 19 can just be closed. At this time, the blocking plate 19 in the left water pipe 13 is in the open state, and the blocking plate 19 in the right water pipe 13 is in the closed state. The valve body 23 on the right side will be subject to the resistance of the water in the right water pipe 13;

[0060] Subsequently, when the valve body 23 on the left side completely exceeds the corresponding blocking plate 19, the right blocking plate 19 opens, and the left blocking plate 19 closes (the valve body 23 on the left side is the main resistance valve body 23, and the valve body 23 on the right side is the auxiliary valve body 23, which is used to assist the valve body 23 on the left side to pass through the corresponding blocking plate 19).

[0061] The moving structure includes a connecting frame 20 fixedly installed on the corresponding blocking plate 19. Slots matching with the corresponding connecting frame 20 are opened on both connection boxes 18. A first rack 15 is fixedly installed between the two connecting frames 20. A first motor 12 is fixedly installed on the housing 11, and a first gear disc 16 meshing with the first rack 15 is fixedly installed on the driving end of the first motor 12.

[0062] When the driving end of the first motor 12 rotates, it will drive the first gear disc 16 fixedly connected thereto to rotate, thereby driving the first rack 15 meshing with the first gear disc 16 to move. The movement of the first rack 15 will drive the two blocking plates 19 to move in the same direction through the connecting frame 20, realizing the intermittent opening and closing of the two water pipes 13.

[0063] Embodiment 3: The difference between this embodiment and the technical solution of Embodiment 2 lies in: Referring to Figures 1 - 4 、Figures 12 - 18 , a rotating shaft 26 is rotatably installed inside the valve body 23, and a rotating ball 24 that cooperates with the valve body 23 is fixedly installed on the rotating shaft 26. A hydrophobic hole is provided in the middle of the rotating ball 24. When the valve body 23 rotates, the water in the water pipe 13 will flow through the hydrophobic hole. When the rotating ball 24 rotates, it will change the opening size of the hydrophobic hole, thereby changing the resistance. A driving mechanism 25 and a locking mechanism that cooperate with the rotating shaft 26 are installed inside the housing 11. Two electromagnetic rings 14 are fixedly installed on the housing 11. A tension detector that cooperates with the transmission line is installed on the frame 1. The tension detector will transmit the tension detection signal to the control cabinet 6, and then control the suction force of the electromagnetic ring 14 through the control system inside the control cabinet 6.

[0064] The driving mechanism 25 includes a fixing frame 30 fixedly installed on the rotating ring 17. A second rack 28 is slidably installed on the fixing frame 30. A return spring 29 is fixedly installed between the second rack 28 and the fixing frame 30. A first magnetic block 32 that cooperates with the corresponding electromagnetic ring 14 is installed on the second rack 28 through a delay structure. A second gear disk 27 that meshes with the second rack 28 is fixedly installed on the rotating shaft 26.

[0065] Since the surface of the transmission line is non-uniform and smooth, the tension will change in real time. At this time, the control system inside the control cabinet 6 is used to control the suction force of the electromagnetic ring 14. The change in the suction force between the electromagnetic ring 14 and the first magnetic block 32 will drive the second rack 28 to move through the delay structure. The movement of the second rack 28 drives the second gear disk 27 that meshes with it to rotate, thereby driving the rotating shaft 26 to rotate. The rotating shaft 26 drives the rotating ball 24 to rotate, changing the opening size of the hydrophobic hole (when adjusting the tension, if the tension needs to be increased, then control the suction force between the electromagnetic ring 14 and the first magnetic block 32 to increase. The deflection angle of the rotating ball 24 increases. At this time, the opening of the hydrophobic hole on the rotating ball 24 decreases, and the water passing ability of the rotating ball 24 decreases, and the resistance of the valve body 23 increases, thereby increasing the resistance of the rotating shaft 10);

[0066] The function of the return spring 29 is that when the suction force between the electromagnetic ring 14 and the first magnetic block 32 decreases, at this time, the second rack 28 is reset through the return spring 29, so as to drive the rotating shaft 26 to reset and expand the opening size of the hydrophobic hole on the rotating ball 24.

[0067] The locking mechanism includes a friction ring 35 fixedly installed on the rotating shaft 26. A fixed block 39 is fixedly installed on the rotating ring 17. Two elastic telescopic rods 41 are fixedly installed on the fixed block 39. A connecting block 40 is fixedly installed on the telescopic ends of the two elastic telescopic rods 41. Two groups of pulling rods are rotatably installed on the connecting block 40 through a shaft body. Each group of pulling rods consists of two pull rods 37. A friction plate 36 that cooperates with the friction ring 35 is installed between the two groups of pulling rods. The friction plate 36 is rotatably connected to each pull rod 37. A limiting structure that cooperates with the shaft body is installed on the fixed block 39;

[0068] Since the blocking plate 19 contracts in the connection box 18, when the blocking plate 19 retracts into the connection box 18, the water pipe 13 communicates with the connection box 18, and part of the water will enter the connection box 18. Then, when the blocking plate 19 extends, it will bring the water into the water pipe 13. Although the time is short, it will also generate moving turbulence, affecting the stability of the water in the water pipe 13. At this time, a locking mechanism is used to lock the rotating shaft 26 on the rotating ball 24 to prevent the influence of the turbulence on the rotating ball 24 (since the rotating ball 24 maintains balance by magnetic force and the elastic force of the return spring 29, once turbulence occurs, the balance of the rotating ball 24 will be damaged, and at this time the rotating ball 24 will deflect. Therefore, the locking mechanism can well solve this problem).

[0069] The elastic telescopic rod 41 is always in a stretched state. The connecting block 40 is pulled to move through the elastic telescopic rod 41. Under the action of the pull rod 37, the friction plate 36 is pulled. The upper moving friction plate 36 always adheres to the friction ring 35 to lock the rotating shaft 26 and maintain the stability of the rotating ball 24.

[0070] A loosening structure that cooperates with the connecting block 40 is installed on the fixed block 39. The loosening structure includes two rollers 42. The two rollers 42 are respectively rotatably installed on the fixed block 39 and the connecting block 40. A connecting rod 38 is slidably installed on the fixed block 39. A second magnetic block 34 that cooperates with the corresponding electromagnetic ring 14 is fixedly installed on the connecting rod 38. Two wedge blocks 21 that cooperate with the two rollers 42 are fixedly installed at one end of the connecting rod 38 away from the second magnetic block 34. The two wedge blocks 21 are symmetrically designed with respect to the line connecting the two rollers 42 (the connecting rod 38 is a damped telescopic rod that can automatically retract. At the moment when the magnetic force of the electromagnetic ring 14 changes and the damping has not had time to respond, the second magnetic block 34 will drive the wedge block 21 to move through the connecting rod 38. When moving for a certain time, the damping responds, and the wedge block 21 will reset to the position where it adheres to the two rollers 42 under the pressing force of the rollers 42).

[0071] When it is necessary to increase the tension, the magnetic force between the electromagnetic ring 14 and the second magnetic block 34 increases (under the attraction of the electromagnetic ring 14 and the second magnetic block 34, the wedge block 21 will always be in contact with the roller 42), which will cause the second magnetic block 34 to move towards the side close to the electromagnetic ring 14. The second magnetic block 34 will drive the wedge block 21 to move through the connecting rod 38, so that the wedge block 21 is inserted between the two rollers 42. At this time, the distance between the two rollers 42 increases, and the position of the roller 42 on the fixed block 39 remains unchanged. Therefore, the roller 42 on the connecting block 40 will drive the connecting block 40 to move together, stretching the elastic telescopic rod 41. At this time, the friction plate 36 is separated from the friction ring 35, and the rotating shaft 26 loses the locking of the friction ring 35 and the friction plate 36, and will rotate under the action of the driving mechanism 25.

[0072] The limiting structure includes a slide rail 43 fixedly installed on the fixed block 39. A sliding block 44 is slidably installed on the slide rail 43. The sliding block 44 is rotatably connected to the shaft body. The functions of the sliding block 44 and the slide rail 43 are to keep the shaft body moving in a straight line, make the two groups of pull rods move synchronously, ensure the synchronous movement of both ends of the friction plate 36, and reduce the probability of the friction plate 36 shifting.

[0073] The delay structure includes a plate body 31 fixedly installed on the second rack 28. A plurality of delay springs 33 are fixedly installed on the plate body 31. One end of the plurality of delay springs 33 away from the plate body 31 is fixedly connected to the first magnetic block 32. An expansion rod is fixedly installed on the plate body 31, and the telescopic end of the expansion rod is fixedly connected to the first magnetic block 32.

[0074] Due to the change in the magnetic force of the electromagnetic ring 14, it will also affect the first magnetic block 32 and the second magnetic block 34 at the same time. And the locking of the rotating shaft 26 needs to be unlocked before the driving mechanism 25 drives the rotating shaft 26 to rotate, and the rotating shaft 26 needs to be locked before the driving mechanism 25 completes the driving adjustment. At this time, it is realized through the delay structure. The change in the magnetic force of the electromagnetic ring 14 will drive the first magnetic block 32 to move. And a delay spring 33 is installed between the first magnetic block 32 and the plate body 31 (the delay spring 33 is an ordinary spring, and for the purpose of differential description, it is named the delay spring 33). Therefore, when the second magnetic block 32 moves, it will not drive the plate body 31 to move immediately, but will stretch the delay spring 31, producing a certain delay effect. After the rotating shaft 26 is unlocked, the plate body 31 will move under the elastic force of the delay spring 33.

[0075] The specific operation steps of this device are as follows:

[0076] The coiled power transmission line passes through the winding guide 4, then bypasses the driving wheel 3 and the driven wheel 2 and exits from the unwinding guide 5. The end of the power transmission line needs to be connected to a traction device to pull the power transmission line to move and keep the outgoing line tension of the power transmission line constant. The traction speed is the same as the driving speed of the driving wheel 3. When the driving wheel 3 rotates, it will drive the driven wheel 2 to rotate through the power transmission line. The tension of the power transmission line is adjusted by the resistance between the driven wheel 2 and the frame 1. The faster the driving wheel 3 rotates, the greater the tension, and vice versa.

[0077] When the driven wheel 2 rotates, it will drive the rotating shaft 10 to rotate. When the rotating shaft 10 rotates, it will drive the rotating ring 17 to rotate through the mounting ring 22. The rotation of the rotating ring 17 drives the valve body 23 fixedly connected thereto to rotate in the water pipe 13. The water in the water pipe will generate resistance to the valve body 23, causing the rotating shaft 10 to form damping to offset the inertia of the rotation of the driven wheel 2.

[0078] When the driving end of the first motor 12 rotates, it will drive the first gear disk 16 fixedly connected thereto to rotate, thereby driving the first rack 15 meshing with the first gear disk 16 to move. The movement of the first rack 15 will drive the two plugging plates 19 to move in the same direction simultaneously through the connecting frame 20, realizing the intermittent opening and closing of the two water pipes 13.

[0079] When the left plugging plate 19 plugs the corresponding water pipe 13, at this time, the left valve body 23 is located above the left plugging plate 19, while the right plugging plate 19 retracts into the corresponding connection box 18. The water in the other water pipe 13 will rotate with the rotation of the valve body 23 without being blocked by the plugging plate 19, while the left plugging plate 19 will prevent the water in the corresponding water pipe 13 from rotating with the valve body 23. At this time, the left valve body 23 plays a role in generating resistance.

[0080] When the left valve body 23 rotates one circle and collides with the corresponding plugging plate 19, when it is about to collide, at this time, the left plugging plate 19 retracts into the corresponding connection box 18, while the right valve body 23 just exceeds the position of the corresponding plugging plate 19. At this time, the right plugging plate 19 can just be closed. At this time, the plugging plate 19 in the left water pipe 13 is in the open state, and the plugging plate 19 in the right water pipe 13 is in the closed state. The right valve body 23 will be resisted by the water in the right water pipe 13.

[0081] Subsequently, when the left valve body 23 completely exceeds the corresponding plugging plate 19, the right plugging plate 19 opens and the left plugging plate 19 closes.

[0082] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An overhead power transmission line electric tension machine, comprising a frame (1), characterized in that: It also includes a rotating shaft (10) rotatably mounted on the frame (1), a driven wheel (2) being fixedly mounted on the rotating shaft (10), a driving wheel (3) being rotatably mounted on the frame (1), and the driving wheel (3) being driven to rotate via a driving gear (9); A housing (11) is fixedly mounted on the frame (1), two groups of resistance components that cooperate with each other are mounted in the housing (11), the resistance components comprising a water pipe (13) fixedly mounted in the housing (11), a rotating ring (17) rotatably mounted on the water pipe (13), a mounting ring (22) fixedly mounted on the rotating shaft (10), the mounting ring (22) and the rotating ring (17) being fixedly connected, and a blocking mechanism that cooperates with the two water pipes (13) is mounted on the housing (11); The blocking mechanism comprises a connection box (18) fixedly mounted on a corresponding water pipe (13), the two connection boxes (18) being in opposite directions, the two water pipes (13) being provided with a through hole matching the corresponding connection box (18), the two connection boxes (18) being slidably mounted with a blocking plate (19) matching the corresponding water pipe (13), the two blocking plates (19) being located on the same horizontal line, and a movable structure being mounted between the housing (11) and the two blocking plates (19); The movable structure comprises a connecting frame (20) fixedly mounted on a corresponding blocking plate (19); a slot body matching the corresponding connecting frame (20) is provided on the two connecting boxes (18); a first rack (15) is fixedly mounted between the two connecting frames (20); a first motor (12) is fixedly mounted on the housing (11); and a first toothed disc (16) meshing with the first rack (15) is fixedly mounted on the driving end of the first motor (12); A valve body (23) is fixedly mounted on the rotating ring (17). The valve body (23) is located inside the water pipe (13). The rotating ring (17) and the water pipe (13) form a closed pipeline. A rotating shaft (26) is rotatably mounted inside the valve body (23). A rotating ball (24) matching the valve body (23) is fixedly mounted on the rotating shaft (26). A driving mechanism (25) matching the rotating shaft (26) and a locking mechanism are mounted inside the housing (11). Two electromagnetic rings (14) are fixedly mounted on the housing (11).

2. The electric tension machine for overhead power transmission lines according to claim 1, characterized in that: A control cabinet (6) is fixedly mounted on the frame (1) for automatically controlling the operation of electrical components in the tension machine. A protective cover (8) and a heat dissipation cabinet (7) are fixedly mounted on the frame (1). The protective cover (8) is located outside the outer shell (11). The heat dissipation cabinet (7) is used to dissipate heat from the outer shell (11).

3. The electric tension machine for overhead power transmission lines according to claim 1, characterized in that: A reeling guide (5) cooperating with the driven wheel (2) is slidably mounted on the frame (1), and a reeling guide (4) cooperating with the driving wheel (3) is slidably mounted on the frame (1), for guiding the transmission line to ensure that the transmission line fits the driving wheel (3) and the driven wheel (2).

4. The electric tension machine for overhead power transmission lines according to claim 1, characterized in that: The driving mechanism (25) comprises a fixing frame (30) fixedly mounted on a rotating ring (17); a second rack (28) is slidably mounted on the fixing frame (30); a return spring (29) is fixedly mounted between the second rack (28) and the fixing frame (30); a first magnetic block (32) matched with a corresponding electromagnetic ring (14) is mounted on the second rack (28) via a delay structure; and a second toothed disc (27) meshing with the second rack (28) is fixedly mounted on the rotating shaft (26).

5. The electric tension machine for overhead power transmission lines according to claim 4, characterized in that: The delay structure comprises a plate body (31) fixedly mounted on the second rack (28), a plurality of delay springs (33) fixedly mounted on the plate body (31), an end of the plurality of delay springs (33) away from the plate body (31) being fixedly connected to a first magnetic block (32), a telescopic rod fixedly mounted on the plate body (31), a telescopic end of the telescopic rod being fixedly connected to the first magnetic block (32).

6. The electric tension machine for overhead power transmission lines according to claim 1, characterized in that: The locking mechanism comprises a friction ring (35) fixedly mounted on a rotating shaft (26); a fixed block (39) fixedly mounted on the rotating ring (17); two elastic telescopic rods (41) fixedly mounted on the fixed block (39); a connecting block (40) fixedly mounted on the telescopic ends of the two elastic telescopic rods (41); two groups of pull rods rotatably mounted on the connecting block (40) via an axle; each group of pull rods is composed of two pull rods (37); a friction plate (36) matched with the friction ring (35) is commonly mounted between the two groups of pull rods; the friction plate (36) and each pull rod (37) are rotatably connected; a limiting structure matched with the axle is mounted on the fixed block (39); and a loosening structure matched with the connecting block (40) is mounted on the fixed block (39).

7. The electric tension machine for overhead power transmission lines according to claim 6, characterized in that: The limiting structure comprises a slide rail (43) fixedly mounted on a fixed block (39), a slide block (44) being slidably mounted on the slide rail (43), and the slide block (44) being rotationally connected to the shaft body.

8. The electric tension machine for overhead power transmission lines according to claim 7, characterized in that: The loosening structure comprises two rollers (42), the two retracing rollers (42) are rotatably mounted on a fixed block (39) and a connecting block (40) respectively, a connecting rod (38) is slidably mounted on the fixed block (39), a second magnetic block (34) matching with a corresponding electromagnetic ring (14) is fixedly mounted on the connecting rod (38), and two wedge blocks (21) matching with the two rollers (42) are fixedly mounted on one end of the connecting rod (38) away from the second magnetic block (34).

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