500kV high-voltage cable laying system and method

Abstract

The invention discloses a 500kV high-voltage cable laying system and method, and the system comprises a cable pay-off device which comprises a cable reel and a driving device for driving the cable reel to rotate; a plurality of power conveyors, each power conveyor is provided with a sub-controller, and each sub-controller is in communication connection with the master controller; the conveying assembly comprises a linear conveying assembly and a corner / turning conveying assembly, and the corner / turning conveying assembly is arranged at a turn or a corner; the corner / turning conveying assembly comprises three groups of conveying wheel assemblies which are arranged in sequence; one connecting part is arranged between every two adjacent conveying wheel assemblies, the cross section of each connecting part is in a circular ring shape, and the connecting parts can stretch out and draw back in the length direction. According to the system and the method, large-diameter, long-distance, limited-laying-space and heavy-weight cables can be laid, the system is simple in structure and convenient to disassemble, assemble and operate, labor input is reduced, and laying efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of cable laying, and more specifically, to a 500kV high voltage cable laying system and method. Background Art

[0002] 500kV high-voltage cables are the main power transmission channels for large hydropower stations or substations. Compared with traditional overhead lines, high-voltage cables have the advantages of small footprint and low electromagnetic interference, and are widely used in various power stations. However, the laying of 500kV high-voltage cables involves many complex technologies, and the laying environment is mostly vertical shafts, inclined shafts, and horizontal tunnels. The long distance, limited space, heavy cables, difficult repair after damage, and high safety hazards often affect the quality of cable laying.

[0003] Taking the 500kV high-voltage cable (290 / 500kV XLPE 1×800mm2 63kA / 2s) of Qingyuan Pumped Storage Power Station as an example, the cable outer diameter is about 151mm, the weight is 22.7kg / m, and the average length is about 1400m. The connection between the ground switch station GIS equipment and the underground GIS equipment is achieved through the outgoing line inclined shaft and horizontal tunnel. The following difficulties will be encountered during the cable laying process: (1) Difficult to clamp. The high-voltage cable has multiple layers of resin insulation inside, and the outermost layer is coated with a graphite layer. Its bending radius is 3173mm. Due to the special cable structure and the long-distance traction, the clamping force of the conventional laying tool cable conveyor is difficult to accurately control. In addition, it is affected by the humid environment and is easy to slip or be over-tightened, causing damage to the cable structure.

[0004] (2) Difficult to lay out. The diameter of a 500kV high-voltage cable reel exceeds 5m and its weight can reach over 40t. 500kV high-voltage cables are usually laid out at the site or in the GIS room. Most sites are compact and have almost no hoisting space. It is difficult for the crane in the GIS room to hoist the heavy cable reel.

[0005] (3) Difficult to control. On a laying route of more than 1000m, a cable conveyor is usually required every 20m. It is difficult to synchronize multiple conveyors at cable reels, corners, and straight sections. The maximum allowable traction force of the high-voltage cable is 56kN. Excessive traction force and asynchrony of the conveyors can lead to internal damage to the cable, posing a huge hidden danger to subsequent testing and operation.

[0006] It is difficult to be accurate. Walkie-talkies are generally used as communication equipment during the cable laying process. However, for unified coordination over long distances and at multiple points, a brief error in the transmission of instructions may cause damage to the cable or even personal injury. Summary of the invention

[0007] The present invention provides a 500kV high-voltage cable laying system and method, which can lay cables with large diameter, long distance, limited laying space and heavy weight. The laying system has a simple structure, is easy to assemble and disassemble, and is easy to operate, which reduces labor input and greatly improves laying efficiency.

[0008] In order to achieve these purposes and other advantages of the present invention, in a first aspect, the present invention provides a 500kV high voltage cable laying system, comprising: A cable pay-off device, comprising a cable drum and a driving device for driving the cable drum to rotate; A power conveyor is provided at every predetermined first spacing in the cable laying path, wherein each power conveyor is provided with a sub-controller; A main controller, each sub-controller is communicatively connected to the main controller; A conveying assembly is arranged between two adjacent power conveyors, and the conveying assembly includes a straight conveying assembly and a corner / turning conveying assembly. In a straight laying path, a straight conveying assembly is arranged at every predetermined second interval, and if there is a turn or a corner, the corner / turning conveying assembly is arranged at the turn or the corner; Wherein, the corner / turning conveying component comprises: The conveying wheel assembly is provided in three groups in sequence, each group of the conveying wheel assembly has a circular cross section, and four first rotating wheels are provided at equal intervals along the circumferential direction inside, and the inner edge lines of the four first rotating wheels are located on the same circumference to allow the cable to pass through; A connecting component is provided between two adjacent groups of conveying wheel assemblies. The cross section of the connecting component is annular and the connecting component is retractable along the length direction.

[0009] Preferably, in the 500kV high-voltage cable laying system, the conveying wheel assembly specifically comprises: A first annular housing is vertically arranged, and the central axis of the ring is consistent with the laying direction of the cable; The first rotating wheel assembly is provided with four, and is respectively located at the upper side, the lower side, the left side and the right side of the first annular shell. Each first rotating wheel assembly includes a first fixed shaft and the first rotating wheel. A first bearing is fixedly sleeved at the middle position of the first fixed shaft, and the first rotating wheel is fixedly sleeved on the outer side of the first bearing. Both ends of the first fixed shaft are arranged on the inner wall of the first annular shell; The first base is arranged below the first annular shell and is used to support the first annular shell.

[0010] Preferably, in the 500kV high-voltage cable laying system, the first rotor assembly further includes a first spring, and a first spring is provided at both ends of each of the first fixed shafts, so that the position of the first rotor can move radially along the first annular shell.

[0011] Preferably, the 500kV high-voltage cable laying system is provided with a first opening at the bottom of the first annular shell; the first base includes a first left base and a first right base, which are respectively fixed on both sides of the first opening; wherein, one end of the first fixed axis located on the lower side is hinged to the inner wall of the first annular shell, and the other end is detachably connected to the inner wall of the first annular shell.

[0012] Preferably, in the 500kV high-voltage cable laying system, the linear conveying assembly comprises: A second annular shell is vertically arranged, and a center axis of the second annular shell is consistent with a laying direction of the cable; The second rotating wheel assembly is provided with two groups, which are respectively located at the two ends of the second annular shell, each group includes four second rotating wheel assemblies, each second rotating wheel assembly includes a second fixed shaft and a second rotating wheel, a second bearing is fixedly sleeved at the middle position of the second fixed shaft, and the second rotating wheel is fixedly sleeved on the outer side of the second bearing, and both ends of the second fixed shaft are arranged on the inner wall of the second annular shell; A second spring, wherein a second spring is disposed at both ends of each second fixed shaft, so that the position of the second rotating wheel can move along the radial direction of the second annular housing; Among them, a second opening is set at the bottom of the second annular shell; a second left base and a second right base are respectively fixed on both sides of the second opening; one end of the second fixed axis located on the lower side is hinged to the inner wall of the second annular shell, and the other end is detachably connected to the inner wall of the second annular shell.

[0013] Preferably, in the 500kV high-voltage cable laying system, the cable pay-off device specifically comprises: The driving device comprises: four driving wheels, which are divided into two groups, one group of driving wheels is arranged at each end of the cable drum, and the supporting disk on each end of the cable drum is located between two opposite driving wheels; Two main beams and two auxiliary beams, the two main beams are arranged in parallel, the two auxiliary beams are arranged in parallel, the two main beams and the two auxiliary beams are fixedly connected to form a rectangular frame, and a driving wheel is arranged at each corner of the rectangular frame, wherein the longitudinal axis of the main beam is arranged parallel to the rotation center axis of the cable drum.

[0014] Preferably, in the 500kV high-voltage cable laying system, the master controller is arranged on one side of the cable pay-off device, and the sub-controller adopts a split I / O module and communicates with the master controller using the PROFINET RT protocol.

[0015] Preferably, in the 500 kV high-voltage cable laying system, the predetermined first spacing is 30-40 m, and the predetermined second spacing is 3-5 m.

[0016] Preferably, in the 500kV high-voltage cable laying system, the connecting component is a folded rubber structure with a circular ring-shaped cross section.

[0017] In a second aspect, the present invention further provides a 500kV high-voltage cable laying method, which is applied to any of the above-mentioned 500kV high-voltage cable laying systems, and the method comprises: S1. Determine the planned cable laying route, transport the components of the cable pay-off device to the use site, assemble them, and set up a general controller near the cable pay-off device; S2. Arrange power conveyors. In the planned cable laying route, arrange a power conveyor every 30-40m, and each power conveyor is equipped with a sub-controller; S3. In the planned cable laying path, if it is in a straight section, a straight conveying component is set every 3 to 5 meters between two adjacent power conveyors. If there is a turn or corner, a corner / turn conveying component is set at the turn or corner; S4, the cable pay-off device and the power conveyor are controlled individually or jointly, the sub-controller adopts a split I / O module and communicates with the main controller using the PROFINET RT protocol, wherein the controller of the drive device of the cable pay-off device and the sub-controller are both provided with a switch; S5. Check whether the physical connection between the sub-controller and the main controller is correct, and check whether the power supply is stable; S6. Start the high-voltage cable transportation. When the high-voltage cable is transported to the end point, the cable pay-off device stops and all power conveyors stop synchronously.

[0018] The present invention has at least the following beneficial effects: First, since the cable unwinding device includes a cable drum and a driving device for driving the cable drum to rotate, the cable unwinding device provided in the present invention is an active cable unwinding device, and no cable traction device is required. In the cable laying path, a power conveyor is provided at a predetermined first spacing, and each power conveyor is provided with a sub-controller, and the sub-controller adopts a split I / O module, and each sub-controller is communicatively connected with the main controller. Therefore, the present invention networks each power conveyor with the main controller in a star network topology structure, and distributes I / O operations such as computing tasks, data storage, data processing, and data transmission to multiple nodes for processing, which significantly improves the processing speed, improves the overall performance of the system, and avoids the phenomenon that multiple power conveyors are not synchronized and cause internal damage to the cable.

[0019] Second, a conveying assembly is also arranged between two adjacent power conveyors. The conveying assembly is arranged in two types according to the laying path: a straight conveying assembly and a corner / turning conveying assembly; in the straight laying path, a straight conveying assembly is arranged at a predetermined second interval, and if there is a turn or a corner, the corner / turning conveying assembly is arranged at the turn or the corner. The corner / turning conveying assembly includes: three conveying wheel assemblies and a connecting component. A connecting component is arranged between two adjacent groups of conveying wheel assemblies. The cross section of the connecting component is circular and the connecting component is retractable along the length direction. They are a whole, retractable connecting component, and the angle formed by the three conveying wheel assemblies can be adjusted at will. Therefore, the corner / turning conveying assembly can be conveniently arranged according to the planned laying route, and the operation is particularly simple. In addition, since four first rotating wheels are arranged at equal intervals along the circumference inside the corner / turning conveying assembly, the inner edge lines of the four first rotating wheels are located on the same circumference, and the four first rotating wheels rotate simultaneously, so that the cable can be conveyed conveniently and quickly.

[0020] Third, during construction, the various components of the cable pay-off device need to be transported to the site of use and then assembled, and the assembled cable pay-off device occupies a small area, which is very suitable for construction stages with large site limitations and a small operating range.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side structural schematic diagram of a cable pay-off device in a 500kV high-voltage cable laying system of the present invention; Figure 2 A top view of a cable pay-off device in a 500kV high-voltage cable laying system of the present invention; Figure 3 A top view of a corner / turning conveying assembly in a 500 kV high-voltage cable laying system of the present invention; Figure 4 It is a schematic diagram of the side structure of the conveying wheel assembly in the corner / turning conveying assembly of the present invention; Figure 5 It is a side structural schematic diagram of the linear conveying component in the 500kV high-voltage cable laying system of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0024] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0025] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense. For example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in an integral manner. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The orientations or positional relationships indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] like Figure 1~Figure 5As shown, the embodiment of the present invention provides a 500kV high-voltage cable laying system, including: a cable pay-off device, which includes a cable drum 1 and a driving device 2 for driving the cable drum to rotate; a power conveyor, in the cable laying path, a power conveyor is arranged at a predetermined first interval, wherein each power conveyor is provided with a sub-controller; a main controller, each sub-controller is connected to the main controller for communication, and in the specific setting, the sub-controller adopts a split I / O module and uses PROFINET RT protocol is used to communicate with the master controller, and the master controller is arranged on one side of the cable unwinding device, or in the vicinity thereof; a conveying component is arranged between two adjacent power conveyors, and the conveying component includes a straight conveying component 100 and a corner / turning conveying component 200. In a straight laying path, a straight conveying component 100 is arranged at a predetermined second interval, and if there is a turn or a corner, the corner / turning conveying component 200 is arranged at the turn or the corner; wherein the corner / turning conveying component 200 includes: a conveying wheel component 210, which is sequentially arranged in three groups, and the cross section of each group of conveying wheel components 210 is circular, and four first rotating wheels 6 are arranged at equal intervals along the circumferential direction inside, and the inner edge lines of the four first rotating wheels 6 are located on the same circumference to allow the cable to pass through; a connecting component 5, a connecting component 5 is arranged between two adjacent groups of conveying wheel components, and the cross section of the connecting component 5 is annular and the connecting component 5 is retractable along the length direction. Specifically, the connecting component 5 is a folding rubber structure with an annular cross section.

[0027] In the above embodiment, since the cable unwinding device includes a cable drum 1 and a driving device 2 for driving the cable drum to rotate, the cable unwinding device provided in the present invention is an active cable unwinding device, and no cable traction device is required. In the cable laying path, a power conveyor is provided at every predetermined first spacing, and the power conveyor can be an existing device. For the predetermined first spacing, illustratively, it is set to 30~40m. The conveying direction of the first power conveyor is as perpendicular as possible to the central axis of the cable drum to ensure smooth unwinding of the cable from the cable drum. Subsequent power conveyors are specifically provided according to the planned laying path. The driving device drives the cable drum to rotate, and the cable wound on the cable drum is sent to the power conveyor. Under the transportation of multiple power conveyors, the cable is transported to a distant place. In order to ensure that multiple power conveyors can run simultaneously and achieve synchronization, so as to avoid excessive traction tension and internal cable damage due to the asynchrony of the power conveyors, a sub-controller is arranged on each power conveyor, and the sub-controller adopts a split I / O module. Each sub-controller communicates with the main controller using the PROFINET RT protocol. Therefore, the present invention networks the split I / O modules of each power conveyor with the main controller in a star network topology, and distributes I / O operations such as computing tasks, data storage, data processing and data transmission to multiple nodes for processing, which significantly improves the processing speed, improves the overall performance of the system, and avoids the phenomenon of internal cable damage caused by asynchrony of multiple power conveyors. A conveying assembly is also provided between two adjacent power conveyors to prevent the cables between the adjacent power conveyors from sagging due to gravity. Two types of conveying assemblies are provided according to the laying path: a straight conveying assembly 100 and a corner / turning conveying assembly 200; in the straight laying path, a straight conveying assembly is provided at every predetermined second spacing, and the predetermined second spacing is exemplarily set to 3-5 m. If there is a turn or corner, the corner / turning conveying assembly 200 is provided at the turn or corner. The corner / turning conveying assembly 200 includes: three conveying wheel assemblies 210 and a connecting component 5. A connecting component 5 is provided between two adjacent sets of conveying wheel assemblies 210. The cross section of the connecting component 5 is circular and the connecting component 5 is retractable along the length direction. They are a whole, retractable connecting component, and can adjust the angle formed by the three conveying wheel assemblies 210 at will. Therefore, the corner / turning conveying assembly 200 can be conveniently provided according to the planned laying route, and the operation is particularly simple. In addition, since four first rotating wheels 6 are arranged at equal intervals along the circumferential direction inside the conveying wheel assembly 210, the inner edge lines of the four first rotating wheels 6 are located on the same circumference, and the four first rotating wheels rotate simultaneously, so that the cable can be conveyed conveniently and quickly.

[0028] In one specific embodiment, in the 500 kV high voltage cable laying system, the conveying wheel assembly 210 specifically includes: A first annular housing 9 is arranged vertically, and the central axis of the ring is consistent with the laying direction of the cable; Four first wheel assemblies are provided, which are respectively located at the upper side, the lower side, the left side and the right side of the first annular shell. Each first wheel assembly includes a first fixed shaft 7 and the first wheel 6. A first bearing is fixedly sleeved in the middle of the first fixed shaft 7. The first wheel 6 is fixedly sleeved on the outer side of the first bearing. Both ends of the first fixed shaft 7 are arranged on the inner wall of the first annular shell 9. The first base 10 is disposed below the first annular shell 9 and is used to support the first annular shell 9 .

[0029] In the above embodiment, four first wheels 6 are provided, which are arranged at equal intervals inside the first annular housing 9. The cross section of the first wheel 6 is an arc-shaped with a narrow middle and wide ends, which can be adapted to the arc-shaped surface of the cable, and the edge lines of the four first wheels 6 are located on the same circumference, so that the cable can pass through better.

[0030] In one specific embodiment, in the 500kV high-voltage cable laying system, the first rotor assembly further includes a first spring 8, and a first spring 8 is provided at both ends of each first fixed shaft 7, so that the position of the first rotor 6 can move along the radial direction of the first annular shell 9. The provision of the first spring 8 can make the four first rotors fit more closely and more adaptably to the arc circumference of the cable, especially at turns / corners, the provision of the first spring 8 can make the cable slightly buffered and adjusted at turns or corners, so that the transmission is smoother.

[0031] In one specific embodiment, the 500kV high-voltage cable laying system is provided with a first opening 15 at the bottom of the first annular shell 9; the first base 10 includes a first left base and a first right base, which are respectively fixed on both sides of the first opening 15; wherein, one end of the first fixed axis 7 located on the lower side is hinged to the inner wall of the first annular shell 9, and the other end is detachably connected to the inner wall of the first annular shell 9.

[0032] In the above embodiment, since the first opening 15 is provided at the bottom of the first annular shell 9, and one end of the first fixed shaft 7 located at the lower side is hinged to the inner wall of the first annular shell 9, and the other end is detachably connected to the inner wall of the first annular shell 9, when the cable is transmitted to the end point, one end of the first fixed shaft 7 located at the lower side is removed and rotated to one side. Since the first spring 8 is provided, the first rotating wheel 6 located on the left and right sides moves radially outward a little bit, and the cable can come out of the conveying wheel assembly 210 through the first opening, and the operation is simple and convenient. In the specific setting, one end of the first fixed shaft 7 is hinged to the inner wall of the first annular shell 9, and the rotation direction is forward or backward, not downward or upward. As for the detachable connection of the other end to the inner wall of the first annular shell 9, the disassembly method is not specifically limited here, and the snap setting or bolt fixing can be used, as long as the function can be achieved.

[0033] It should also be noted that the up and down, left and right, bottom, etc. mentioned in the embodiments are all relative descriptions. Since cables are usually laid in vertical shafts and inclined shafts, the fixing direction of the first base of the conveying wheel assembly will also change according to the laying route. It may be fixed on an inclined line or on a vertical line.

[0034] In one specific embodiment, the 500 kV high voltage cable laying system, the linear conveying assembly 100 comprises: A second annular housing 14 is vertically arranged, and a center axis of the second annular housing 14 is consistent with a laying direction of the cable; The second wheel assembly is provided with two groups, which are respectively located at the two ends of the second annular housing 14, each group includes four second wheel assemblies, each second wheel assembly includes a second fixed shaft 13 and a second wheel 11, a second bearing is fixedly sleeved in the middle position of the second fixed shaft 13, and the second wheel 11 is fixedly sleeved on the outer side of the second bearing, and both ends of the second fixed shaft 13 are arranged on the inner wall of the second annular housing 14; A second spring 12 is provided at both ends of each second fixed shaft 13, so that the position of the second rotating wheel 11 can move along the radial direction of the second annular housing 14; Among them, a second opening is set at the bottom of the second annular shell 14; the second left base and the second right base are respectively fixed on both sides of the second opening; one end of the second fixed axis located on the lower side is hinged to the inner wall of the second annular shell, and the other end is detachably connected to the inner wall of the second annular shell.

[0035] In the above embodiment, two sets of second rotating wheel assemblies are provided in the linear conveying assembly 100, which can better support or transmit the cable. After the cable is transmitted to the end point, it is also convenient for the cable to come out of the linear conveying assembly.

[0036] In one specific embodiment, the 500kV high voltage cable laying system, the cable pay-off device specifically comprises: The driving device 2 comprises: four driving wheels, which are divided into two groups, one group of driving wheels is arranged at each end of the cable drum 1, and the supporting disk on each end of the cable drum is located between two opposite driving wheels; Two main beams 4 and two auxiliary beams 3, the two main beams 4 are arranged in parallel, the two auxiliary beams 3 are arranged in parallel, the two main beams 4 and the two auxiliary beams 3 are fixedly connected to form a rectangular frame, and a driving wheel is arranged at each corner of the rectangular frame, wherein the longitudinal axis of the main beam 4 is arranged parallel to the rotation center axis of the cable drum 1.

[0037] In the above embodiment, the cable pay-off device is composed of a plurality of components, which are convenient for disassembling the components. When construction requires, the components are transported to the site of use by a truck and assembled on site, which is convenient and occupies little space.

[0038] Another embodiment of the present invention further provides a 500kV high-voltage cable laying method, which is applied to any of the above-mentioned 500kV high-voltage cable laying systems, and the method comprises: S1. Determine the planned cable laying route, transport the components of the cable pay-off device to the use site, assemble them, and set up a general controller near the cable pay-off device.

[0039] In the specific implementation, the various components of the cable pay-off device are transported to the site of use by truck, and hoisted to the flat site. The distance between the two main beams is adjusted according to the width of the cable drum, and the distance bolts are adjusted to make the length of the adjustable distance auxiliary beam the same as the distance between the two main beams. The auxiliary beam and the main beam are connected by bolts, and then the level meter is used to check the horizontality of the main beam. After observing that the bubble of the level meter is completely in the middle position, the rotating device assembly is hoisted and the support connection bolts are tightened. After assembly, the overall equipment occupies an area of ​​4800×3520mm, which occupies a small area and is very suitable for construction stages with large site limitations and small operating range.

[0040] S2. Arrange the power conveyor. In the planned cable laying route, arrange a power conveyor every 30 to 40 meters. After the position of the power conveyor is determined, use expansion bolts to fix the power conveyor to the ground. Each power conveyor is equipped with a sub-controller.

[0041] S3. In the planned cable laying path, if it is in a straight section, a straight conveying component 100 is set every 3 to 5 meters between two adjacent power conveyors. If there is a turn or corner, a corner / turn conveying component 200 is set at the turn or corner.

[0042] S4. The cable pay-off device and the power conveyor are controlled individually or jointly, and the sub-controller adopts a split I / O module and communicates with the main controller using the PROFINET RT protocol, wherein the controller of the drive device of the cable pay-off device and the sub-controller are both provided with switches.

[0043] Specifically, the 500kV cable pay-off device and the power conveyor can be controlled individually or jointly. The 500kV cable pay-off device uses a frequency conversion system to control the start and stop of the motor. Each power conveyor has an independent control box, i.e., a sub-controller, and adopts a split I / O module. It uses the PROFINET RT protocol system to communicate. Each power conveyor is networked with the main controller in a star network topology. The main controller is arranged near the cable pay-off device to facilitate real-time observation of the rotation of the cable drum. This control system is used to distribute I / O operations such as computing tasks, data storage, data processing, and data transmission to multiple nodes for processing, which significantly improves the processing speed and the overall performance of the system. In the PROFINET RT communication mode, data packets are assigned to different output queues according to priority. Network devices process according to these priorities to ensure that high-priority data can be transmitted in a timely manner, thereby meeting the strict real-time requirements of industrial automation systems. The control boxes of the 500kV high-voltage cable pay-off device and the power conveyor are both equipped with switches and are connected throughout with telephone lines. Therefore, the communication quality is stable and reliable, not easily affected by external interference, and information transmission without blind spots is achieved along the entire line.

[0044] S5. Check whether the physical connection between the sub-controller and the main controller is correct, and check whether the power supply is stable.

[0045] Specifically, set the IP address of the split I / O module in the software to ensure that it is in the same network segment as the main controller. Configure network parameters, such as subnet mask, gateway, etc., to ensure smooth network communication. Configure the I / O address of the split I / O module on the main controller so that its input and output points can be correctly accessed and controlled. Ensure that the address allocation matches the actual application requirements to avoid conflicts and confusion. Verify whether the program logic is correct to ensure that the expected control function can be achieved. Without network communication, first debug the split I / O module on a single machine to check whether the input and output functions of the module are normal, such as whether the indicator light flashes as expected and whether the signal is transmitted correctly. Enable the network communication function to check whether the communication between the main controller and the split IO module is normal. Run the control program in the entire system to verify whether the split IO module can work as expected. Check whether the input and output signals are accurate and timely, and handle possible abnormal situations.

[0046] S6. Start the high-voltage cable transportation. When the high-voltage cable is transported to the end point, the cable pay-off device stops and all power conveyors stop synchronously.

[0047] Specifically, after the mechanical part is installed and the electrical part is debugged, the cable drum can be slowly hoisted to the 500kV high-voltage cable pay-off device by a crane, and the edges of the cable drums on both sides are checked to be the same distance from the edge of the rotating wheel to ensure that the cable drum is placed in the center and the construction personnel in each part are in place. Start the 500kV high-voltage cable pay-off device at the main control console, lead the starting end of the cable to the conveyor belt of the power conveyor, and after the cable completely enters the conveyor belt, let the cable fall into the groove of the conveyor belt, adjust the spacing of the conveyor belt, use the conveyor belt to clamp the cable, and switch the control mode of the power conveyor to "far away". Repeat the operation until the last power conveyor starts to transport the cable. The power conveyor belt is made of rubber material, which increases the friction with the cable while protecting the graphite layer of the cable, making the transmission of the cable more efficient and stable. During the construction process, if an emergency occurs at each power conveyor position, the emergency stop button can be pressed to contact the main control console by phone, avoiding the conventional use of walkie-talkies due to signal interference and inability to report to the control console in time, which may lead to accidents. The cable laying speed is accurately controlled to ensure the laying quality of the cable and the safety of personnel. After the high-voltage cable is transported to the end point, the 500kV high-voltage cable pay-off device is stopped, and the high-voltage cable is placed from the end point to the starting point. The portable lifting and traction hoist is mainly used for cable lifting and shaping. The specific operations are as follows: 1) Use two layers of high-voltage cable brackets to fix an angle steel. The upper end of the angle steel is 80cm higher than the cable placement bracket, and the upper end is welded with a hook. 2) Hang the portable lifting and traction hoist to the angle steel hook, use the sling to slowly raise the high-voltage cable, and slowly drop it after it is higher than the bottom clamp of the high-voltage cable. Adjust the angle of the bottom clamp according to the actual bending direction of the cable, install the upper clamp after it is fully fitted to the high-voltage cable, and tighten the bolts. 3) The overall line of high-voltage cables is generally laid in a serpentine shape, and the terminals are vertically reserved. The bending work required on site can also be pulled and shaped using a portable lifting and traction hoist. When adjusting a single-phase high-voltage cable, use a sling to fix one side of the portable lifting and traction hoist to the clamp of the different phases, and use a sling on the other side to tighten the cable and slowly pull it in for adjustment. After meeting the specification requirements, adjust the clamp tightening bolts.

[0048] In summary, this method can be used to lay cables with large diameter, long distance, limited laying space and heavy weight. The laying system has a simple structure, is easy to assemble and disassemble, and is easy to operate, which reduces labor input and greatly improves laying efficiency.

[0049] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0050] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. 500kV high voltage cable laying system, characterized in that: include: A cable pay-off device, comprising a cable drum and a driving device for driving the cable drum to rotate; A power conveyor is provided at every predetermined first spacing in the cable laying path, wherein each power conveyor is provided with a sub-controller; A main controller, each sub-controller is communicatively connected to the main controller; A conveying assembly is arranged between two adjacent power conveyors, and the conveying assembly includes a straight conveying assembly and a corner / turning conveying assembly. In a straight laying path, a straight conveying assembly is arranged at every predetermined second interval, and if there is a turn or a corner, the corner / turning conveying assembly is arranged at the turn or the corner; Wherein, the corner / turning conveying component comprises: The conveying wheel assembly is provided in three groups in sequence, each group of the conveying wheel assembly has a circular cross section, and four first rotating wheels are provided at equal intervals along the circumferential direction inside, and the inner edge lines of the four first rotating wheels are located on the same circumference to allow the cable to pass through; A connecting component is provided between two adjacent groups of conveying wheel assemblies. The cross section of the connecting component is annular and the connecting component is retractable along the length direction.

2. The 500kV high voltage cable laying system according to claim 1, characterized in that: The conveying wheel assembly specifically comprises: A first annular housing is vertically arranged, and the central axis of the ring is consistent with the laying direction of the cable; The first rotating wheel assembly is provided with four, and is respectively located at the upper side, the lower side, the left side and the right side of the first annular shell. Each first rotating wheel assembly includes a first fixed shaft and the first rotating wheel. A first bearing is fixedly sleeved at the middle position of the first fixed shaft, and the first rotating wheel is fixedly sleeved on the outer side of the first bearing. Both ends of the first fixed shaft are arranged on the inner wall of the first annular shell; The first base is arranged below the first annular shell and is used to support the first annular shell.

3. The 500kV high voltage cable laying system according to claim 2, characterized in that: The first rotating wheel assembly also includes a first spring. A first spring is disposed at both ends of each first fixed shaft, so that the position of the first rotating wheel can move along the radial direction of the first annular shell.

4. The 500kV high voltage cable laying system according to claim 3, characterized in that: A first opening is set at the bottom of the first annular shell; the first base includes a first left base and a first right base, which are respectively fixed on both sides of the first opening; wherein, one end of the first fixed axis located on the lower side is hinged to the inner wall of the first annular shell, and the other end is detachably connected to the inner wall of the first annular shell.

5. The 500kV high voltage cable laying system according to claim 1, characterized in that: The linear conveying assembly comprises: A second annular shell is vertically arranged, and a center axis of the second annular shell is consistent with a laying direction of the cable; The second rotating wheel assembly is provided with two groups, which are respectively located at the two ends of the second annular shell, each group includes four second rotating wheel assemblies, each second rotating wheel assembly includes a second fixed shaft and a second rotating wheel, a second bearing is fixedly sleeved at the middle position of the second fixed shaft, and the second rotating wheel is fixedly sleeved on the outer side of the second bearing, and both ends of the second fixed shaft are arranged on the inner wall of the second annular shell; A second spring, wherein a second spring is disposed at both ends of each second fixed shaft, so that the position of the second rotating wheel can move along the radial direction of the second annular housing; Among them, a second opening is set at the bottom of the second annular shell; a second left base and a second right base are respectively fixed on both sides of the second opening; one end of the second fixed axis located on the lower side is hinged to the inner wall of the second annular shell, and the other end is detachably connected to the inner wall of the second annular shell.

6. The 500kV high voltage cable laying system according to claim 1, characterized in that: The cable pay-off device specifically comprises: The driving device comprises: four driving wheels, which are divided into two groups, one group of driving wheels is arranged at each end of the cable drum, and the supporting disk on each end of the cable drum is located between two opposite driving wheels; Two main beams and two auxiliary beams, the two main beams are arranged in parallel, the two auxiliary beams are arranged in parallel, the two main beams and the two auxiliary beams are fixedly connected to form a rectangular frame, and a driving wheel is arranged at each corner of the rectangular frame, wherein the longitudinal axis of the main beam is arranged parallel to the rotation center axis of the cable drum.

7. The 500kV high voltage cable laying system according to claim 1, characterized in that: The master controller is arranged on one side of the cable pay-off device, and the sub-controller adopts a split I / O module and communicates with the master controller using the PROFINET RT protocol.

8. The 500kV high voltage cable laying system according to claim 1, characterized in that: The predetermined first spacing is 30-40 m, and the predetermined second spacing is 3-5 m.

9. The 500kV high voltage cable laying system according to claim 1, characterized in that: The connecting component is a folded rubber structure with a circular cross section.

10. A 500kV high-voltage cable laying method, applied to a 500kV high-voltage cable laying system as claimed in any one of claims 1 to 9, characterized in that: The method comprises: S1. Determine the planned cable laying route, transport the components of the cable pay-off device to the use site, assemble them, and set up a general controller near the cable pay-off device; S2. Arrange power conveyors. In the planned cable laying route, arrange a power conveyor every 30-40m, and each power conveyor is equipped with a sub-controller; S3. In the planned cable laying path, if it is in a straight section, a straight conveying component is set every 3 to 5 meters between two adjacent power conveyors. If there is a turn or corner, a corner / turn conveying component is set at the turn or corner; S4, the cable pay-off device and the power conveyor are controlled individually or jointly, the sub-controller adopts a split I / O module and communicates with the main controller using the PROFINET RT protocol, wherein the controller of the drive device of the cable pay-off device and the sub-controller are both provided with a switch; S5. Check whether the physical connection between the sub-controller and the main controller is correct, and check whether the power supply is stable; S6. Start the high-voltage cable transportation. When the high-voltage cable is transported to the end point, the cable pay-off device stops and all power conveyors stop synchronously.

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