Cable erecting tensioner and automatic control system thereof

By using modular wheel groove liner design and wireless parameter transmission, the problems of low automation level of cable laying equipment and loose wheel groove liner were solved, realizing efficient and intelligent control of cable laying.

CN114744549BActive Publication Date: 2025-11-18STATE GRID ZHEJIANG ELECTRIC POWER CO LTD +1
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Patent Information

Application Number
CN202210259592.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-03-16
Publication Date
2025-11-18
Estimated Expiration
2042-03-16

AI Technical Summary

Technical Problem

Existing cable laying equipment has a low degree of automation, the installation and removal of wheel groove liner is complicated and easy to loosen, and the control delay of tensioning equipment leads to low work efficiency.

Method used

The modular wheel groove liner design enables intelligent control of the tension machine and traction machine by transmitting equipment parameters wirelessly in real time.

Benefits of technology

It improves the ease of installation and removal and stability of the wheel groove gasket, reduces delays caused by manual operation, and improves the efficiency of cable laying.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a cable erection tension machine and an automatic control system thereof and belongs to the technical field of cable erection equipment. The existing tension machine wheel groove gasket is complex to disassemble and assemble, is prone to loosening and has low automation degree. The application comprises a vehicle frame, a tension wheel, a control module box and an equipment box. The vehicle frame is provided with the tension wheel and the control module box and the equipment box on the two sides. The tension wheel shaft surface is uniformly provided with a plurality of first positioning grooves. The first positioning grooves are provided with a sleeving assembly. The tension wheel side plate is provided with a pin. The sleeving assembly is provided with a wheel groove gasket. The wheel groove gasket is provided with a plurality of wire grooves. Meanwhile, the arc-shaped bottom plate and the arc-shaped side plates with the bending function at the two ends of the sleeving assembly are provided with a plurality of second positioning grooves and a plurality of third positioning grooves. The wheel groove gasket bottom and the two ends are provided with first positioning blocks and second positioning blocks. The above mechanism realizes quick disassembly and assembly of the wheel groove gasket, increases the stability of the installation stress and realizes the intelligence of the tension pay-off.
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Description

Technical Field

[0001] This invention relates to the field of cable laying equipment technology, specifically to a cable laying tension machine and its automatic control system. Background Technology

[0002] After decades of development, the technology for stringing power transmission lines has improved significantly compared to the early stages. However, compared to other industries, the mechanization and intelligence of power transmission line construction equipment lags far behind the overall technological development of society, with the current state of tensioning equipment technology being particularly prominent. The traditional "one person, one machine" stringing method has low automation, relies mainly on manual operation, has scattered displays, is not conducive to observation, cannot centrally control multiple machines in coordinated operation, requires many operators, and requires good coordination skills among operators, making construction difficult. The single communication method, relying on walkie-talkies, leads to passive operation, untimely tensioning control, and low work efficiency, which have always been pain points in the industry.

[0003] Meanwhile, the delay in the linkage control of tensioning and traction can easily cause the cable to squeeze and wear the groove liner on the tension wheel. However, the existing groove liner is generally installed directly on the inner cylindrical surface of the tension wheel with screws, which makes it inconvenient to disassemble when it is worn and replaced. In addition, after a long period of tensioning and relaxation, the screws are prone to loosening, causing the groove liner to loosen and slip off.

[0004] This invention aims to solve the problem of a cable laying tension machine and its automatic control system. Through a unique design, it increases the convenience of installing and disassembling the wheel groove liner, while also increasing installation stability. By enabling the equipment on the traction machine and tension machine to transmit various equipment parameters in real time wirelessly, the equipment can automatically adjust the output value according to the various parameters, thus realizing intelligent tensioning of the cable. Summary of the Invention

[0005] To address the problems mentioned above in the technical background, the purpose of this invention is to provide a cable laying tension machine and its automatic control system. On the one hand, by modularly adding wheel groove liner, it achieves convenient disassembly and assembly while ensuring secure installation. On the other hand, the equipment on the tension machine and the traction machine can wirelessly transmit various equipment parameters in real time, and the equipment can automatically adjust the output value according to the various parameters, realizing intelligent tensioning and cable laying. This solves the problems mentioned in the background art of the complex disassembly and assembly of existing tension machine wheel groove liner which is prone to loosening, and the control delay and low operation efficiency of the tensioning equipment during use.

[0006] To achieve the above objectives, modular wheel groove liner installation is employed, facilitating easy installation and disassembly while simultaneously increasing the stability of the wheel groove liner under compression. The technical solution adopted in this invention is as follows:

[0007] A cable laying tensioning machine includes a frame, a tension wheel, a control module box, and an equipment box. The tension wheel and the control module box, which controls the rotational resistance of the tension wheel, are respectively mounted on both sides of the frame.

[0008] Multiple sets of first positioning grooves are evenly provided on the tension wheel shaft surface, multiple sets of wire grooves are provided on the wheel groove liner, a set assembly is installed on the first positioning groove, and a pin is installed on the tension wheel side plate that penetrates and is inserted into the first positioning groove to fix the set assembly.

[0009] The assembly is equipped with an arc-shaped wheel groove liner. The arc-shaped base plate and the arc-shaped side plates with outward bending function at both ends of the assembly are respectively provided with multiple sets of second positioning grooves and multiple sets of third positioning grooves to restrict the radial and tangential movement of the wheel groove liner. The bottom and both ends of the wheel groove liner are equipped with first positioning blocks and second positioning blocks that are respectively inserted into the second positioning grooves and the third positioning grooves.

[0010] Furthermore, the tension wheel includes a driving wheel and a driven wheel subjected to an external braking force. The tension wheel side plates at both ends of the first positioning groove are symmetrically provided with first locking holes, one of which penetrates the tension wheel side plate. The pin is inserted into the first locking hole to fix the assembly installed on the first positioning groove.

[0011] Furthermore, the kit includes an insert block, an arc-shaped base plate, and two sets of arc-shaped side plates. The insert block is installed in the lower center of the arc-shaped base plate and is installed in the first positioning groove. The bottom surface of the arc-shaped base plate is in contact with the axial surface of the tension wheel. At the same time, the arc-shaped side plates are symmetrically installed at both ends of the arc-shaped base plate. The top surface of the arc-shaped base plate is evenly provided with multiple sets of second positioning grooves parallel to the axial direction of the tension wheel. The two sets of arc-shaped side plates are evenly provided with multiple sets of arc-shaped third positioning grooves on their facing arc surfaces. The insert block is provided with a second locking hole, which communicates with the first locking holes at both ends.

[0012] Furthermore, the adjacent ends of the curved base plate included in Liang Lin's kit components are in contact.

[0013] Furthermore, a rotatable support plate is installed on the back of the frame on one side of the driven wheel. A tail clamp box is installed on the top of the support plate facing the driven wheel. The tail clamp box is provided with a cable pass-through groove. Two sets of cable guide posts are symmetrically installed in the cable pass-through groove. The cable guide posts are provided with multiple sets of annular cable guide grooves, and the cable guide posts are parallel to the axis of the driven wheel.

[0014] Furthermore, the outer ends of the driving wheel and the driven wheel are connected and fixed by an axle bracket, and the frame and the axle bracket are mounted on the wheel assembly unit.

[0015] Furthermore, a support plate is mounted on the frame on the other side of the tension wheel, and a control module box and a device box for controlling the rotational resistance of the tension wheel are mounted on the support plate.

[0016] To achieve the above objectives, by enabling the devices on the tension machine and traction machine to wirelessly transmit various equipment parameters in real time, the equipment can automatically adjust its output value based on these parameters, thus realizing intelligent tensioning and improving operational efficiency. The technical solution adopted in this invention is as follows:

[0017] An automatic control system for a cable laying tensioner includes a signal processing unit, a signal transceiver unit, a storage unit, a device PLC, and device sensors;

[0018] The device sensors are used to monitor the state of the tension machine and transmit the data to the signal processing unit;

[0019] The signal processing unit stores the processed monitoring data in the storage unit, and at the same time transmits the monitoring data to the cable laying traction equipment through the signal transceiver unit;

[0020] The operating status of the traction equipment is transmitted to the signal transceiver unit. The signal transceiver unit then transmits the operating status of the traction equipment to the equipment PLC through the signal processing unit, and the equipment PLC controls the tension machine to operate in conjunction with the signal.

[0021] Furthermore, the device sensors are used to collect the real-time status of the local device, including directly or indirectly reading engine parameters, hydraulic pump parameters, and monitoring various parameters such as temperature, speed, and pressure.

[0022] Furthermore, the equipment PLC is composed of a programmable logic controller, which is used to control various actions of the tension machine, and the operating data controlled by the equipment PLC is stored in the storage unit.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) In this invention, multiple sets of first positioning grooves are evenly provided on the tension wheel shaft surface. A set of components is installed on the first positioning groove. The set of components can be disassembled or installed by pulling out or inserting pins. At the same time, multiple sets of second positioning grooves and multiple sets of third positioning grooves are provided on the arc-shaped bottom plate and the arc-shaped side plates with elasticity at both ends to restrict the radial and tangential movement of the wheel groove liner. The bottom and both ends of the wheel groove liner are provided with first positioning blocks and second positioning blocks that are respectively inserted into the second positioning grooves and third positioning grooves. Because the arc-shaped side plates on both sides are elastic, multiple sets of first positioning blocks and multiple sets of second positioning blocks can be easily inserted into the second positioning grooves and third positioning grooves when installing the wheel groove liner. Then the set of components is installed on the tension wheel. The two side plates of the tension wheel limit the arc-shaped side plates of the set of components and lock the wheel groove liner. Finally, the effect of convenient disassembly and assembly and stable installation of the wheel groove liner is achieved.

[0025] (2) In this invention, a signal processing unit, a signal transceiver unit, a storage unit, a device PLC, and a device sensor are installed on the tension machine. The device sensor collects the real-time status of the tension machine, including directly or indirectly reading engine parameters, hydraulic pump parameters, monitoring temperature, speed, and pressure parameters. Then, the data is transmitted to the signal processing unit. The signal processing unit stores the data and transmits the signal to the cable laying traction device through the signal transceiver unit. The action status of the traction device is transmitted to the signal transceiver unit. The signal transceiver unit transmits the action status of the traction device to the device PLC through the signal processing unit. The device PLC then controls the tension machine to move in conjunction with the signal processing unit. This achieves real-time linkage between the tensioning and traction devices, avoiding delays and misoperations caused by manual communication control. The intelligent linkage setting increases the efficiency of cable laying operations. Attached Figure Description

[0026] Figure 1 The three-dimensional representation provided in the embodiments of the present invention Figure 1 ;

[0027] Figure 2 The three-dimensional representation provided in the embodiments of the present invention Figure 2 ;

[0028] Figure 3 A three-dimensional view of the wiring post provided in an embodiment of the present invention;

[0029] Figure 4 A perspective view of the pin pull-out tension wheel provided in an embodiment of the present invention;

[0030] Figure 5 A partial perspective view provided for an embodiment of the present invention;

[0031] Figure 6 A perspective view of the kit components provided in an embodiment of the present invention;

[0032] Figure 7 A perspective view of the wheel groove liner provided in an embodiment of the present invention;

[0033] Figure 8 The system control flowchart provided for embodiments of the present invention.

[0034] In the diagram: 1. Frame; 2. Support plate; 3. Tail clamp box; 4. Cable tray; 5. Cable routing post; 6. Cable routing tray; 7. Drive wheel; 8. First positioning groove; 9. First locking hole; 10. Pin; 11. Assembly kit; 12. Insert block; 13. Second locking hole; 14. Arc-shaped base plate; 15. Second positioning groove; 16. Arc-shaped side plate; 17. Third positioning groove; 18. Wheel groove liner; 19. Cable tray; 20. First positioning block; 21. Second positioning block; 22. Driven wheel; 23. Axle bracket; 24. Support plate; 25. Control module box; 26. Equipment box; 27. Wheelset unit. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] like Figure 1-8As shown, a cable laying tension machine includes a frame 1, a tension wheel, a control module box 25, and an equipment box 26. The tension wheel and the control module box 25 and equipment box 26, which control the rotational resistance of the tension wheel, are respectively installed on both sides of the frame 1. Multiple sets of first positioning grooves 8 are evenly distributed on the axle surface of the tension wheel. The first positioning grooves 8 can be square or trapezoidal. A mounting assembly 11 is installed on the first positioning groove 8. Pins 10, which penetrate and insert into the first positioning grooves 8 to fix the mounting assembly 11, are installed on the side plate of the tension wheel. The pins 10 have handles at their ends for easy insertion. Arc-shaped groove pads 18 are installed on the mounting assembly 11. The multiple sets of groove pads 18 should use groove pads 18 with different friction coefficients. Using materials with different friction coefficients to make the groove pads ensures uniform force on the conductor, avoids the phenomenon of conductor snagging, protects the conductor, and also makes the tension wheel more stable. The wire is released at a uniform speed. The wheel groove liner 18 is provided with multiple sets of wire grooves 19. At the same time, the arc-shaped base plate 14 and the arc-shaped side plates 16 with outward bending function at both ends included in the assembly 11 are respectively provided with multiple sets of second positioning grooves 15 and multiple sets of third positioning grooves 17 to restrict the radial and tangential movement of the wheel groove liner 18. The arc-shaped side plates 16 with outward bending function facilitate the installation of the wheel groove liner 18. At the same time, when it is clamped on the tension wheel, the two side plates of the tension wheel clamp it to prevent outward bending. The bottom and both ends of the wheel groove liner 18 are provided with first positioning blocks 20 and second positioning blocks 21 that are respectively inserted into the second positioning grooves 15 and third positioning grooves 17. By setting multiple sets of second positioning grooves 15 and multiple sets of third positioning grooves 17, the radial and tangential movement of the wheel groove liner 18 is limited, which increases the stability of the installation force.

[0037] In this embodiment, the assembly is disassembled or installed by pulling out or inserting pins. During installation, pins 10 are inserted into the first locking holes 9 and the second locking holes 13 on both sides to achieve a locking effect. At the same time, the arc-shaped base plate 14 and the arc-shaped side plates 16 with elasticity at both ends are respectively provided with multiple sets of second positioning grooves 15 and multiple sets of third positioning grooves 17 to restrict the radial and tangential movement of the wheel groove liner 18. The bottom and both ends of the wheel groove liner 18 are equipped with first positioning blocks 20 and second positioning blocks 21 that are respectively inserted into the second positioning grooves 15 and the third positioning grooves 17. Because the arc-shaped side plates 16 on both sides are elastic, when installing the wheel groove liner 18, multiple sets of first positioning blocks 20 and multiple sets of second positioning blocks 21 can be easily inserted into the second positioning grooves 15 and the third positioning grooves 17 respectively. Then, the assembly is installed on the tension wheel. The two side plates of the tension wheel limit the arc-shaped side plates 16 of the assembly and lock the wheel groove liner 18, thus achieving the effect of convenient disassembly and assembly and stable installation of the wheel groove liner 18.

[0038] like Figure 1 , 4As shown, the tension wheel includes a driving wheel 7 and a driven wheel 22 subjected to an external braking force. The driving and driven wheels are arranged in parallel, and the diameter of the driven wheel is 0.6 to 0.95 times the diameter of the driving wheel. The tension wheel side plates at both ends of the first positioning groove 8 are symmetrically provided with first locking holes 9. One of the first locking holes 9 penetrates the tension wheel side plate. The pin 10 is inserted into the first locking hole 9 to fix the assembly 11 installed on the first positioning groove 8. The assembly is locked by inserting the pin 10 into the first locking hole 9, the second locking hole 13 and the first locking hole 9 on the other side at the same time.

[0039] like Figure 4 , 5 As shown in Figure 6, the kit component 11 includes a plug 12, an arc-shaped base plate 14, and two sets of arc-shaped side plates 16. The plug 12 is installed in the lower middle part of the arc-shaped base plate 14 and is installed in the first positioning groove 8. The bottom surface of the arc-shaped base plate 14 is in contact with the tension wheel shaft surface. At the same time, the arc-shaped side plates 16 are symmetrically installed at both ends of the arc-shaped base plate 14. The top surface of the arc-shaped base plate 14 is evenly provided with multiple sets of second positioning grooves 15 parallel to the tension wheel axis. The two sets of arc-shaped side plates 16 are evenly provided with multiple sets of arc-shaped third positioning grooves 17 on their facing arc surfaces. The plug 12 is provided with a second locking hole 13, which is connected to the first locking holes 9 at both ends. By installing the plug 12 in the first positioning groove 8 and locking it with a pin 10, the locking function is achieved. The installation and disassembly are convenient.

[0040] like Figure 5 As shown, the adjacent ends of the arc-shaped base plate 14 included in Liang Lin's package component 11 are in contact, which makes the structure stable under stress.

[0041] like Figure 2 , 3 As shown, a rotatable support plate 2 is installed on the back of the frame 1 on one side of the driven wheel 22. A tail clamp box 3 is installed on the side of the support plate 2 facing the driven wheel 22. A cable passage 4 is provided on the tail clamp box 3. Two sets of cable guide posts 5 are symmetrically installed in the cable passage 4. The cable guide posts 5 are provided with multiple sets of annular cable guide grooves 6. The cable guide posts 5 are parallel to the axis of the driven wheel 22. The height of the tail clamp box 3 can be adjusted by rotating the support plate 2 to facilitate the cable passage at different angles. At the same time, the cable passes through the cable guide grooves 6 between the upper and lower cable guide posts 5. The rotation of the cable guide posts 5 increases the smoothness of the cable passage.

[0042] like Figure 1 , 2 As shown, the outer ends of the driving wheel 7 and the driven wheel 22 are connected and fixed by the axle bracket 23. The frame 1 and the axle bracket 23 are mounted on the wheel assembly unit 27. The driven wheels are arranged in parallel to form a uniform tension on the cable.

[0043] like Figure 2As shown, a support plate 24 is installed on the frame 1 on the other side of the tension wheel. A control module box 25 and an equipment box 26 for controlling the rotational resistance of the tension wheel are installed on the support plate 24. By setting the support plate 24 to install the control module box 25 and the equipment box 26, the control device and module can operate stably.

[0044] An automatic control system for a cable laying tensioner includes a signal processing unit, a signal transceiver unit, a storage unit, a device PLC, and device sensors;

[0045] The equipment sensors are used to monitor the status of the tensioner and transmit the data to the signal processing unit;

[0046] The signal processing unit stores the processed monitoring data in the storage unit, and at the same time transmits the monitoring data to the cable laying traction equipment through the signal transceiver unit;

[0047] The traction equipment's operating status is transmitted to the signal transceiver unit. The signal transceiver unit then transmits the traction equipment's operating status to the equipment PLC through the signal processing unit, and the equipment PLC controls the tension machine's operation accordingly.

[0048] The equipment sensors are used to collect the real-time status of the tensioner, including directly or indirectly reading engine parameters, hydraulic pump parameters, and monitoring various parameters such as temperature, speed, and pressure.

[0049] The equipment PLC consists of a programmable logic controller, which is used to control various actions of the tension machine. At the same time, the operating data controlled by the equipment PLC is stored in the storage unit.

[0050] Working Principle: By installing a signal processing unit, signal transceiver unit, storage unit, equipment PLC, and equipment sensors on the tension machine, the equipment sensors collect the real-time status of the tension machine, including directly or indirectly reading engine parameters, hydraulic pump parameters, and monitoring various parameters such as temperature, speed, and pressure. This data is then transmitted to the signal processing unit, which stores the data and simultaneously transmits the signal to the cable laying traction equipment via the signal transceiver unit. The traction equipment's operational status is also transmitted to the signal transceiver unit, which in turn transmits it to the equipment PLC via the signal processing unit. The equipment PLC then controls the tension machine's operation in a coordinated manner, thus achieving real-time linkage between tensioning and traction equipment. This avoids delays and misoperations caused by manual communication control, and the intelligent linkage settings increase the efficiency of cable laying operations.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A cable laying tension machine, comprising a frame (1), a tension wheel, a control module box (25), and an equipment box (26), wherein the frame (1) is respectively equipped with a tension wheel and the control module box (25) and the equipment box (26) for controlling the rotational resistance of the tension wheel, characterized in that: Multiple sets of first positioning grooves (8) are evenly provided on the tension wheel shaft surface. A fitting assembly (11) is installed on the first positioning groove (8). A pin (10) is installed on the tension wheel side plate and inserted through the first positioning groove (8) to fix the fitting assembly (11). The fitting assembly (11) includes a plug (12), an arc-shaped base plate (14), and two sets of arc-shaped side plates (16). The plug (12) is installed in the lower middle part of the arc-shaped base plate (14). The plug (12) is installed in the first positioning groove (8). The bottom surface of the arc-shaped base plate (14) is in contact with the tension wheel shaft surface. At the same time, the arc-shaped side plates (16) with outward bending function are symmetrically installed at both ends of the arc-shaped base plate (14). The assembly (11) is equipped with an arc-shaped wheel groove liner (18), which has multiple sets of grooves (19). The top surface of the arc-shaped base plate (14) is evenly provided with multiple sets of second positioning grooves (15) parallel to the axial direction of the tension wheel. The two sets of arc-shaped side plates (16) are evenly provided with multiple sets of arc-shaped third positioning grooves (17) on their facing arc surfaces. The bottom and both ends of the wheel groove liner (18) are equipped with a first positioning block (20) and a second positioning block (21) that are respectively inserted into the second positioning groove (15) and the third positioning groove (17).

2. The cable laying tension machine according to claim 1, characterized in that, The tension wheel includes a driving wheel (7) and a driven wheel (22) subjected to an external braking force. The tension wheel side plates at both ends of the first positioning groove (8) are symmetrically provided with first locking holes (9), one of which is through the tension wheel side plate. The pin (10) is inserted into the first locking hole (9) to fix the assembly (11) installed on the first positioning groove (8).

3. A cable laying tension machine according to claim 2, characterized in that, The insert (12) is provided with a second locking hole (13) through it, and the second locking hole (13) is connected to the first locking holes (9) at both ends; The outer ends of the driving wheel (7) and the driven wheel (22) are connected and fixed by axle bracket (23), and the frame (1) and the axle bracket (23) are mounted on the wheel assembly unit (27).

4. A cable laying tension machine according to claim 3, characterized in that, The adjacent ends of the arcuate base plate (14) contained in the adjacent kit assembly (11) are in contact.

5. A cable laying tension machine according to claim 2, characterized in that, A rotatable support plate (2) is installed on the back of the frame (1) on one side of the driven wheel (22). A tail clamp box (3) is installed on the side of the support plate (2) facing the driven wheel (22). A wire groove (4) is provided on the tail clamp box (3). Two sets of wire guide posts (5) are symmetrically installed in the wire groove (4). Multiple sets of annular wire guide grooves (6) are provided on the wire guide posts (5), and the wire guide posts (5) are parallel to the axis of the driven wheel (22).

6. A cable laying tension machine according to claim 2, characterized in that, A support plate (24) is mounted on the other side of the frame (1) where the tension wheel is mounted. A control module box (25) and a device box (26) for controlling the rotational resistance of the tension wheel are mounted on the support plate (24).

7. An automatic control system for a cable laying tensioner according to any one of claims 1-6, characterized in that, It includes a signal processing unit, a signal transceiver unit, a storage unit, a device PLC, and device sensors; The device sensor is used to monitor the state of the tension machine and transmits the monitoring data to the signal processing unit. The signal processing unit stores the processed monitoring data in the storage unit, and at the same time transmits the monitoring data to the cable laying traction equipment through the signal transceiver unit; The motion status data of the traction equipment is transmitted to the signal transceiver unit. The signal transceiver unit then transmits the motion status data of the traction equipment to the equipment PLC through the signal processing unit, and the equipment PLC controls the tension machine to move in conjunction with the PLC.

8. The automatic control system according to claim 7, characterized in that, The device sensors are used to collect real-time status data of the tension machine, including directly or indirectly reading engine parameters, hydraulic pump parameters, temperature, speed, and pressure.

9. The automatic control system according to claim 7, characterized in that, The equipment PLC consists of a programmable logic controller, which is used to control various actions of the tension machine.

Citation Information

Patent Citations

  • Tension machine for cable erection

    CN217522476U