A high voltage cable laying system and laying method

Abstract

The invention discloses a high-voltage cable laying system and a laying method, and relates to the technical field of high-voltage cable laying, wherein the high-voltage cable laying system comprises: a high-voltage cable traction machine, a plurality of high-voltage cable conveyors and high-voltage cable drums arranged along the laying line, a generator and a control device for supplying power to the high-voltage cable traction machine and the high-voltage cable conveyor; the motor of the high-voltage cable conveyor is provided with a PWM speed regulator electrically connected to the control device.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage cable laying, and in particular to a high-voltage cable laying system and a laying method. Background Art

[0002] At present, when laying high-voltage cables for power transmission, a traction machine is generally used to fix one end of the high-voltage cable, and the transmission high-voltage cable is pulled and laid by mechanical tension, and rollers are used to support the middle of the high-voltage cable. The traction machine is easy to damage the internal structure of the high-voltage cable when laying the high-voltage cable, especially when laying high-voltage cables over long distances, the stress difference between the inner copper conductor of the cable and the outer insulation layer is large, and the high-voltage cable is easy to break. Some laying methods reduce the difference in tension between the outer jacket and the copper core of the high-voltage cable by installing a high-voltage cable conveyor in the middle of the high-voltage cable, which has played a certain role. However, when laying high-voltage cables over long distances, a generator is generally used to power the high-voltage cable conveyor. Due to the long distance, a voltage drop will occur, resulting in the rotation speed of the high-voltage cable conveyor at each different position cannot be unified, and the tension of the high-voltage cable between the two high-voltage cable conveyors at different positions is also different. It is also possible that the high-voltage cable between the two high-voltage cable conveyors is subjected to extrusion pressure due to the speed difference, which is still easy to cause damage to the high-voltage cable during the laying process. Summary of the invention

[0003] The purpose of the present invention is to provide a high-voltage cable laying system and laying method, by using a PWM speed regulator and installing a servo motor as an auxiliary power on a high-voltage cable drum, so as to achieve the effect of uniform force on each section of the high-voltage cable during the high-voltage cable laying process.

[0004] To solve the above problems, one aspect of the present invention provides a high-voltage cable laying system, including: a high-voltage cable traction machine, a plurality of high-voltage cable conveyors and high-voltage cable drums arranged along the laying line, a generator for powering the high-voltage cable traction machine and the high-voltage cable conveyor, and a control device; the motor of the high-voltage cable conveyor is equipped with a PWM speed regulator electrically connected to the control device. The full name of pulse width modulation is: Pulse Width Modulator, referred to as PWM. Due to its special performance, it is often used in DC load circuits, lamp dimming or DC motor speed regulation. The HW-1020 speed regulator is a motor speed regulator and PWM speed regulator made using the principle of pulse width modulation (PWM). The PWM speed regulator has the advantage of low price. The high-voltage cable conveyor is equipped with a PWM speed regulator and connected to the control device. The control device can be used to control the rotation speed of the high-voltage cable conveyor motor, so that the rotation speed of each high-voltage cable conveyor motor is unified, so that the conveying speed of each section of the high-voltage cable between each high-voltage cable conveyor is the same, reducing the excessive and uneven internal stress of the high-voltage cable caused by different conveying speeds of each section of the high-voltage cable, and improving the laying quality of the high-voltage cable. The control device may be a programmable logic controller (PLC), which is a digital operation electronic system specially designed for use in industrial environments. It uses a programmable memory to store instructions for performing operations such as logic operations, sequential control, timing, counting and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input and output. The control device of the present invention achieves the uniformity of the operating speed of each transmission device of the high-voltage cable by controlling each PWM speed regulator, thereby preventing excessive differences in the stress of the high-voltage cable between each device.

[0005] A further technical solution is that a first servo motor is installed on the high-voltage cable drum as a supplementary power; the first servo motor is electrically connected to the control device through a second PWM speed regulator. Existing high-voltage cable drums generally only play a supporting role for high-voltage cables along the line where the high-voltage cables are laid. Installing the first servo motor on the high-voltage cable drum as an auxiliary power during the laying of the high-voltage cable can reduce the tension applied by the high-voltage cable traction machine to the high-voltage cable, as well as the tension provided by the high-voltage cable laying machine in the middle section along the high-voltage cable laying line, so that the high-voltage cables of each section can be simultaneously subjected to the force in the laying direction of the high-voltage cable when the high-voltage cable is laid. In this way, the tension on a single section of the high-voltage cable is smaller, and the tension on the high-voltage cable is more uniform, which is conducive to maintaining a good state of the high-voltage cable during laying, and can also minimize the internal or external damage to the high-voltage cable. The first servo motor of the high-voltage cable drum is electrically connected to the control device through the second PWM speed regulator, and the rotation speed of each high-voltage cable drum and the high-voltage cable drum and the high-voltage cable laying machine can be synchronized through the control device to prevent the high-voltage cable from slipping or uneven force due to the different rotation speeds of each section of the high-voltage cable during the laying process. If the high-voltage cable drum or high-voltage cable laying machine at the front has a low rotation speed, while the high-voltage cable drum or high-voltage cable laying machine following it has a high rotation speed, a large extrusion pressure may be generated inside the high-voltage cable at the middle end. When the extrusion pressure is too large, the high-voltage cable may be bent, derailed, and damaged. In another case, if the high-voltage cable drum or high-voltage cable laying machine at the front has a high rotation speed, while the high-voltage cable drum or high-voltage cable laying machine following it has a low rotation speed, a large tensile stress will be generated inside the high-voltage cable at the middle end. When the tensile stress is too large, the high-voltage cable may be broken or the insulation layer may be broken. After the first servo motor of the high-voltage cable drum is electrically connected to the control device through the second PWM speed regulator, the speed of the first servo motor of each high-voltage cable drum can be controlled by the control device, which can greatly reduce this hazard, make the laying of high-voltage cables safer, and improve the high-quality of high-voltage cable laying.

[0006] A further technical solution is that it also includes a clamping roller assembly, which includes two clamping rollers with parallel axes, a clamping device that makes the two clamping rollers have a relative movement tendency, and the movement tendency is provided by a clamping spring; one of the clamping rollers is equipped with a second servo motor, and the second servo motor is electrically connected to the control device through a third PWM speed regulator. During the laying process, high-voltage cables often need to be laid uphill or downhill. At this time, the high-voltage cable will easily slip on the roller due to its heavy weight. When the slip is serious, it may slip off the roller and cause damage to the high-voltage cable. The use of the clamping roller assembly can make the high-voltage cable clamped by the two clamping rollers to prevent the high-voltage cable from slipping, and installing a second servo motor on a clamping roller as an auxiliary power can reduce the influence of gravity on the movement of the high-voltage cable along the laying direction when the high-voltage cable is uphill or downhill. The second servo motor is electrically connected to the control device through the third PWM speed regulator, which can more conveniently control and adjust the rotation speed of the clamping roller. For example, in an uphill section, the clamping roller at a higher position can increase the pulling force on the high-voltage cable by increasing the speed of the second servo motor, and offset the force of gravity along the laying direction of the high-voltage cable by the increased part of the pulling force. In a downhill section, the clamping roller at a higher position can increase the pulling force on the high-voltage cable by reducing the speed of the second servo motor, and offset the force of gravity along the laying direction of the high-voltage cable by the increased part of the pulling force. The clamping spring provides the force required for the two clamping rollers to move towards each other, and its position can be installed between the two clamping rollers; or after setting a bracket, the clamping spring can be installed between the bracket and the clamping roller, and the clamping spring provides a pulling force or repulsive force between the bracket and the clamping roller so that the two clamping rollers have a tendency to move towards each other.

[0007] A further technical solution is that it also includes a corner device, which includes a rotating shaft and two rotating arms installed on the rotating shaft, an annular support plate is installed on the two rotating arms, an active roller is installed on the rotating shaft, and a guide pulley is installed on the rotating arm; a plurality of mounting holes are arranged on the rotating arm; the driving component of the active roller is a third servo motor, and the third servo motor is electrically connected to the control device through a fourth PWM speed regulator. Bearings can be installed on the rotating shaft to make the rotation of the two rotating arms easier, and the requirements of different bending angles when laying high-voltage cables can be met by adjusting the relative positions of the two rotating arms. The active roller is arranged at the position of the rotating shaft and the power of rotation is provided by the third servo motor, so that the high-voltage cable can be assisted by the tangential force provided by the active roller when turning, so that the high-voltage cable is more stable when laid in a non-straight line. The guide pulleys installed on the two rotating arms can play a guiding role in the corner when the high-voltage cable is laid. When laying the high-voltage cable, the high-voltage cable first passes through the guide pulley installed on one rotating arm, then passes through the active roller, and finally passes through the guide roller on the other rotating arm to pass through the corner device. The installation holes on the rotating arm can facilitate the installation of the corner device at the construction site. For example, the corner device can be directly installed on the wall or well wall of the high-voltage cable laying route, which can reduce the use of auxiliary devices such as scaffolding. The third servo motor is electrically connected to the control device through the fourth PWM speed regulator to synchronize the speed with other rotating mechanisms. When the high-voltage cable is laid, the speed of the third servo motor can be adjusted by the control device according to the actual situation to achieve better results.

[0008] A further technical solution is that the guide pulleys on the two rotating arms are respectively equipped with two fourth servo motors, and the two fourth servo motors are electrically connected to the control device through a dual-channel fifth PWM speed regulator. Installing the fourth servo motor on the guide pulley as a supplementary power for the high-voltage cable to pass through the corner can appropriately reduce the traction force applied by the traction machine to the high-voltage cable when the high-voltage cable is laid, and effectively reduce the damage to the high-voltage cable caused by excessive traction. The dual-channel fifth PWM speed regulator can connect two motors at the same time and adjust their speeds.

[0009] A further technical solution is that the power of any servo motor is 300-500W. The power of the servo motor is 300-500W, preferably 400W. After the high-voltage cable drum can provide a certain amount of auxiliary power for the laying of high-voltage cables, the high-voltage cable conveyor can achieve the effect of reducing its volume by reducing its power. When the power of the high-voltage cable conveyor is 300-500W, its volume is small and can enter the position where the space is too small when laying high-voltage cables. There is no need to disassemble the high-voltage cable laying machine and then transport it to a small space for reinstallation and use. The position with too small space is specifically the high-voltage cable well. At the same time, the volume of the corner device can also be reduced to achieve the purpose of convenient installation.

[0010] Another aspect of the present invention provides a high voltage cable laying method of the above-mentioned high voltage cable laying system, comprising the following steps:

[0011] S1: Select high-voltage cable traction machine, high-voltage cable conveyor, high-voltage cable drum and generator according to the project overview; select clamping drum assembly and corner device according to the conditions along the line.

[0012] S2: Arrange high-voltage cable traction machine; arrange high-voltage cable conveyor according to the conditions along the line; arrange high-voltage cable drums in the straight section of the high-voltage cable laying path to make the high-voltage cables along the way suspended; arrange corner devices at the corners, and adjust the angle between the two rotating arms of the corner devices; arrange clamping drum assemblies in the up and down slope sections of the high-voltage cable laying path.

[0013] S3: Arrange the generator and control device in the middle section of the high-voltage cable laying line, connect the generator to each device that requires electricity, and connect the control device to the high-voltage cable conveyor, high-voltage cable drum, clamping drum assembly, and corner device.

[0014] S4: Start after checking each device until the high-voltage cable laying is completed.

[0015] A further technical solution is that in step S2, a high-voltage cable conveyor is arranged at intervals of 50 to 80 m.

[0016] A further technical solution is that in step S2, a high-voltage cable drum is arranged at intervals of 5 to 10 m.

[0017] A further technical solution is that the power of the high-voltage cable conveyor is 300-500W.

[0018] A further technical solution is that in step S3, the angle between the two rotating arms of the corner device is adjusted according to the angle at the corner, and then the corner device is installed at a preset position through the mounting hole; another corner device is installed so that the active rollers and guide pulleys of the two corner devices are close to each other, and the pre-laid high-voltage cables can pass between the guide rollers of the two corner devices, and then pass between the active rollers of the two corner devices, and finally pass out from between another pair of guide rollers.

[0019] The principle of the present invention is explained as follows: By using a PWM speed control module to adjust the speed of each power component in the laying system, the high-voltage cable is prevented from falling or being pulled and damaged due to uneven force during laying. The use of clamping rollers and corner devices solves the problem of high-voltage cable sliding during laying and the difficulty of laying at corners. By reasonably arranging high-voltage cable conveyors and setting power devices on high-voltage cable drums to reduce the power and volume of each high-voltage cable conveyor, it can adapt to the laying of high-voltage cables in more occasions.

[0020] The above technical solution of the present invention has the following beneficial technical effects: the high-voltage cable laying process is more stable, and the high-voltage cable will not fall off or be pulled and damaged. The high-voltage cable can also be laid smoothly at the corner without causing damage to the high-voltage cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an installation diagram of Example 1;

[0022] Figure 2 is a schematic structural diagram of a clamping roller assembly of Example 1;

[0023] Figure 3 is a schematic structural diagram of the corner device of Example 1;

[0024] Figure 4 It is a schematic diagram of the installation of the corner device of Example 2.

[0025] Figure numerals: 1: high-voltage cable traction machine; 2: high-voltage cable conveyor; 3: high-voltage cable drum; 4: ground; 5: high-voltage cable well; 6: clamping drum assembly; 7: corner device; 8: high-voltage cable; 61: clamping drum; 62: clamping device; 63: clamping spring; 64: second servo motor; 71: rotating shaft; 72: rotating arm; 73: annular support plate; 74: driving roller; 75: guide pulley; 76: mounting hole; 77: third servo motor; 78: fourth servo motor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0027] Example 1

[0028] like Figure 1 As shown, a high-voltage cable laying system includes: a high-voltage cable traction machine 1, a high-voltage cable conveyor 2 and a high-voltage cable drum 3 arranged along the laying line, a generator and a control device for powering the high-voltage cable traction machine 1 and the high-voltage cable conveyor 2; the motor of the high-voltage cable conveyor 2 is equipped with a PWM speed regulator electrically connected to the control device. On the laying line of the high-voltage cable, a high-voltage cable conveyor 2 is arranged at intervals of 50 to 80 meters, and a high-voltage cable drum 3 is arranged at intervals of 5 to 10 meters. Within this range, it can be adjusted according to the specific construction environment. The power of the high-voltage cable conveyor 2 is 400W.

[0029] A first servo motor is installed on the high-voltage cable drum 3 as a supplementary power; the first servo motor is electrically connected to the control device through a second PWM speed regulator.

[0030] like Figure 2 As shown, the clamping roller assembly 6 includes two clamping rollers 61 with parallel axes, a clamping device 6262 that enables the two clamping rollers 61 to have a relative movement tendency, and a clamping spring 63 provides the movement tendency; one of the clamping rollers 61 is installed with a second servo motor 64, and the second servo motor 64 is electrically connected to the control device through a third PWM speed regulator.

[0031] like Figure 3 and Figure 4 As shown, the corner device 7 includes a rotating shaft 71 and two rotating arms 72 mounted on the rotating shaft 71, an annular support plate 73 is mounted on the two rotating arms 72, a driving roller 74 is mounted on the rotating shaft 71, and a guide pulley 75 is mounted on the rotating arm 72; a plurality of mounting holes 76 are provided on the rotating arm 72; the driving roller 74 is driven by a third servo motor 77, and the third servo motor 77 is electrically connected to the control device through a fourth PWM speed regulator. The guide pulleys 75 on the two rotating arms 72 of the corner device 7 are respectively mounted with two fourth servo motors 78, and the two fourth servo motors 78 are electrically connected to the control device through a dual-channel fifth PWM speed regulator. The control device is a PLC, which controls the first to fifth PWM speed regulators through a written speed control program to keep the speed of each component uniform.

[0032] Please refer to Figure 1 The following describes a method for laying a high-voltage cable during high-voltage cable laying using a high-voltage cable laying system provided by the present invention, comprising the following steps:

[0033] S1: Select a high-voltage cable traction machine 1, a high-voltage cable conveyor 2, a high-voltage cable drum 3, and a generator according to the project overview; select a clamping drum assembly 6 and a corner device 7 according to the conditions along the line.

[0034] S2: Arrange a high-voltage cable traction machine 1; arrange a high-voltage cable conveyor 2 at intervals of 50 to 80 meters according to the conditions along the line; arrange a high-voltage cable drum 3 at intervals of 5 to 10 meters in the straight section of the high-voltage cable laying path so that the high-voltage cable 8 along the way can be suspended.

[0035] S3: Figure 4 As shown, two corner devices 7 are arranged at the corners, and the angle between the two rotating arms 72 of the corner device 7 is adjusted; the corner device 7 is installed at a preset position through the mounting hole 76; and the clamping roller assembly 6 is arranged in the upper and lower slope sections of the high-voltage cable laying path.

[0036] S4: Arrange the generator and the control device in the middle section of the high-voltage cable laying line, connect the generator to each device that requires electricity, and connect the control device to the high-voltage cable conveyor 2, the high-voltage cable drum 3, the clamping drum assembly 6, and the corner device 7.

[0037] S5: Check each device and start until the high-voltage cable laying is completed.

[0038] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A high voltage cable laying system, characterized in that: include: A high-voltage cable traction machine (1), a plurality of high-voltage cable conveyors (2) and high-voltage cable drums (3) arranged along a laying line, a generator for supplying power to the high-voltage cable traction machine (1) and the high-voltage cable conveyors (2), and a control device; the motor of the high-voltage cable conveyor (2) is provided with a PWM speed regulator electrically connected to the control device, and further comprises a clamping drum assembly (6) and a corner device (7) arranged at a corner position; The high-voltage cable drum (3) is provided with a first servo motor as a supplementary power; The first servo motor is electrically connected to the control device via a second PWM speed regulator; The clamping roller assembly (6) comprises two clamping rollers (61) with parallel axes, a clamping device (62) which enables the two clamping rollers (61) to have a relative movement tendency, and a clamping spring (63) which provides the movement tendency; one of the clamping rollers (61) is equipped with a second servo motor (64), and the second servo motor (64) is electrically connected to the control device via a third PWM speed regulator; The corner device (7) comprises a rotating shaft (71) and two rotating arms (72) mounted on the rotating shaft (71); an annular support plate (73) is mounted on the two rotating arms (72); a driving roller (74) is mounted on the rotating shaft (71); and a guide pulley (75) is mounted on the rotating arm (72); a plurality of mounting holes (76) are provided on the rotating arm (72); a driving component of the driving roller (74) is a third servo motor (77); and the third servo motor (77) is electrically connected to the control device via a fourth PWM speed regulator; The guide pulleys (75) on the two rotating arms (72) are respectively equipped with two fourth servo motors (78), and the two fourth servo motors (78) are electrically connected to the control device via a dual-channel fifth PWM speed regulator.

2. The high voltage cable laying system according to claim 1, characterized in that: The power of any of the servo motors is 300-500W.

3. The high-voltage cable laying method of the high-voltage cable laying system according to claim 1 or 2, characterized in that: The following steps are involved: S1: Select a high-voltage cable traction machine (1), a high-voltage cable conveyor (2), a high-voltage cable drum (3), and a generator according to the project overview; S2: Arrange a high-voltage cable traction machine (1); arrange a high-voltage cable conveyor (2) according to the conditions along the line; arrange a high-voltage cable drum (3) in a straight line section of the high-voltage cable laying path so that the high-voltage cable along the way is suspended; S3: arranging a corner device (7) at the corner, and adjusting the angle between two rotating arms (72) of the corner device (7); arranging a clamping roller assembly (6) in the up and down slope sections of the high-voltage cable laying path; S4: arranging the generator and the control device in the middle section of the high-voltage cable laying line, connecting the generator to various devices requiring electricity, and connecting the control device to the high-voltage cable conveyor (2), the high-voltage cable drum (3), the clamping drum assembly (6), and the corner device (7); S5: Check each device and start until the high-voltage cable laying is completed.

4. The high voltage cable laying method according to claim 3, characterized in that: In step S2, the high-voltage cable conveyor (2) is arranged at intervals of 50 to 80 m.

5. The high voltage cable laying method according to claim 3, characterized in that: In step S2, the high-voltage cable drum (3) is arranged at intervals of 5 to 10 m.

6. The high voltage cable laying method according to claim 3, characterized in that: In step S3, the angle between the two rotating arms (72) of the corner device (7) is adjusted according to the angle at the corner, and the corner device (7) is then installed at a preset position through the installation hole (76); another corner device (7) is installed so that the driving rollers (74) and the guide pulleys (75) of the two corner devices (7) are close to each other, and the pre-laid high-voltage cable can pass between the guide rollers of the two corner devices (7), then pass between the driving rollers (74) of the two corner devices (7), and finally pass out from between another pair of guide rollers.

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