A threading method for a photovoltaic support cable

Abstract

The application provides a threading method of a photovoltaic support cable, and belongs to the technical field of photovoltaic construction. The threading method comprises the following steps: fixing the cable end on a threading device, lifting the threading device to the same height of the inclined support rod of the photovoltaic support to be threaded by an operator, moving the threading device in the direction of the photovoltaic support on the ground by the operator, and controlling the opening and closing of a locking device to perform the threading operation. When the threading device crosses the inclined support rod of the photovoltaic support, it automatically rebounds and is re-locked under the action of an elastic reset member, and the threading operation is repeated to make the threading device continuously thread through the arranged inclined support rods of the photovoltaic support. The application can realize the rapid, stable and continuous threading of the cable through multiple rows of inclined support rods, and effectively improves the construction safety and work efficiency.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic construction technology, and more specifically, relates to a method for threading cables for photovoltaic brackets. Background Technology

[0002] With the rapid growth of global demand for clean energy, photovoltaic (PV) power generation, as an important form of renewable energy, has been widely promoted and applied. In the construction of fixed PV power plants, after the installation of the mounting brackets and PV modules, the electrical system construction becomes a crucial step. Among these steps, the cable laying from the inverter to the box-type transformer is a critical process, requiring the cables to be sequentially threaded through the diagonal braces of each row of PV brackets before being secured and connected. Currently, the diagonal braces of PV brackets are typically about four meters high, requiring approximately two hundred cable threading operations per megawatt of installed PV capacity. Traditional construction mainly relies on two methods: one is to erect ladders for workers to climb and thread the cables; the other is for two workers to work together, using two bamboo poles to alternately lift the cables through the diagonal braces. Both of these conventional methods have significant shortcomings.

[0003] Using ladders for high-altitude work not only requires additional ladder equipment, increasing on-site setup time and labor intensity, but also poses safety risks such as falls from heights and electric shocks. This is especially true in large photovoltaic arrays, where repeated climbing can easily lead to fatigue and potential accidents. While using bamboo poles to lift cables avoids some high-altitude work, it requires two people working together, and the cable ends are prone to slipping during this process, causing repeated detachment, wear, or damage to the cables, necessitating multiple re-tyings, severely impacting construction efficiency and cable laying quality. Furthermore, both traditional methods are labor-intensive and time-consuming, requiring significant manpower and resulting in long overall construction periods, which cannot meet the needs of the rapid construction of current large-scale photovoltaic power plants.

[0004] Furthermore, traditional methods are poorly adaptable to complex terrain or harsh weather conditions, easily causing problems such as scratches on the cable sheath, excessive bending, or weak connections, which in turn affect the long-term reliability and power generation efficiency of the photovoltaic system. Currently, there is no dedicated cable-threading device that can be operated by a single person on the ground, automatically cross diagonal bracing poles, and ensure stable cable guidance. Summary of the Invention

[0005] In view of this, the present invention provides a method for threading cables through photovoltaic brackets, which enables cables to pass through multiple rows of diagonal bracing rods quickly, stably and continuously, effectively improving construction safety and work efficiency.

[0006] This invention is implemented as follows:

[0007] This invention provides a method for threading cables onto a photovoltaic support structure, comprising the following steps:

[0008] S01: Secure the cable end to the cable threading device;

[0009] S02: The operator raises the threading device to the same height as the diagonal brace of the photovoltaic bracket to be threaded;

[0010] S03: The operator moves the wire-threading device towards the photovoltaic bracket on the ground and controls the opening and closing of the locking device to perform the wire-threading operation.

[0011] S04: When the threading device crosses the diagonal brace of the photovoltaic bracket, it automatically springs back and relocks under the action of the elastic reset component;

[0012] S05: Repeated loop threading allows the threading device to continuously pass through the arranged photovoltaic support diagonal braces.

[0013] The technical advantages of the cable threading method for photovoltaic brackets provided by this invention are as follows: Cable threading is achieved through ground operation, eliminating the need for operators to climb the photovoltaic brackets for high-altitude work, thus significantly reducing safety risks such as falls from heights and electric shocks. Operators only need to use the ground-based lifting device to push it forward and control its locking mechanism, reducing the time personnel are exposed to the high-altitude environment of the inclined support poles and improving overall construction safety. The method employs a repetitive, cyclical threading approach, allowing the threading device to continuously thread through multiple rows of photovoltaic bracket inclined support poles, improving construction efficiency, shortening the construction period, and reducing labor costs. Simultaneously, the device's automatic crossing and resetting mechanism reduces the need for manual pulling of cables, lowering the probability of cable damage due to friction, bending, or pulling, and ensuring the quality and long-term reliability of cable laying.

[0014] Based on the above technical solution, the method for threading photovoltaic support cables according to the present invention can be further improved as follows:

[0015] The threading device includes a base, a threading body, a locking linkage mechanism, and a telescopic rod. One end of the telescopic rod is connected to the base by a thread. The telescopic rod has a multi-stage sleeve structure. Adjacent sleeves are fixed by bolts through through holes in the sleeves. The maximum length of the telescopic rod is 4m.

[0016] The base is an isosceles obtuse triangle structure. The apex of the base is fixedly connected to the telescopic rod, and the base is fixedly connected to at least three sets of locking linkage mechanisms.

[0017] The locking linkage mechanism includes an upper rotating rod and a lower rotating rod. One end of the lower rotating rod is rotatably connected to the bottom edge of the base, and the other end of the lower rotating rod is engaged with one end of the upper rotating rod through a locking device. The other end of the upper rotating rod is fixedly connected to the tie rod body. The upper rotating rod and the tie rod body are perpendicular to each other, and the tie rod body and the bottom edge of the base are parallel to each other.

[0018] A right-angled triangular stop is fixed on the bottom edge of the base. The number of stop blocks matches the number of lower rotating rods. The right-angled side of the stop block is set close to the lower rotating rod. The stop block is used to limit the rotation angle of the lower rotating rod.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The device uses a multi-stage sleeve-type telescopic rod with a maximum length of four meters, which allows the operator to flexibly adjust it from the ground according to the different heights of the photovoltaic brackets, raising it to the same height as the diagonal bracing rod, realizing remote control and reducing the use of high-altitude auxiliary tools. The base is designed as an isosceles obtuse-angled triangle structure, which cooperates with at least three sets of locking linkage mechanisms to form multi-point stable support, keeping the cable body stable during the cable threading process and avoiding deviation or swaying caused by single-point force. The locking linkage mechanism achieves selective unlocking and locking through the cooperation of the upper rotating rod, the lower rotating rod and the locking device, allowing the device to orderly cross the diagonal bracing rod. At the same time, the design of the cable body being parallel to the bottom edge of the base and the upper rotating rod being perpendicular to ensure smooth cable guidance and reduce lateral tension or entanglement of the cable during threading. The right-angled triangular stop limits the rotation angle of the lower rotating rod, further improving structural stability, preventing over-rotation or loss of control, and improving the controllability and safety of the threading process.

[0020] Furthermore, the locking device includes a groove, a protrusion, and a miniature push-pull electromagnet. The groove is located below the upper rotating rod and has an elongated structure. The protrusion is located at the top of the lower rotating rod and is fixedly connected to it, with the protrusion fitting the groove. The groove is connected to a through slot that passes through the upper rotating rod, and the through slot and groove are perpendicular to each other. A miniature push-pull electromagnet is fixed inside the through slot. The miniature push-pull electromagnet includes a coil, a moving iron core, a return spring, and a small lithium battery. The coil and return spring are integrated into a small frame, and the moving iron core is fixedly connected to the spring. The coil is connected to a small lithium battery compartment. A Bluetooth relay is also installed in the through slot. A miniature limit switch is also installed in the inner wall of the groove. The Bluetooth relay is electrically connected to the miniature limit switch and the miniature push-pull electromagnet. The small frame is flush with the inner wall of the groove, and the length of the moving iron core extended in the extended state of the return spring is adapted to the circular groove on the protrusion.

[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The locking device uses a mechanical structure with a groove and a protrusion that fit together, combined with a miniature push-pull electromagnet, a return spring, and a small lithium battery, to achieve precise locking and unlocking control. Through the electrical connection of a Bluetooth relay and a miniature limit switch, the device can be remotely unlocked when it contacts the diagonal brace, and automatically locked upon removal, forming an intelligent mechanism of "unlocking upon contact and automatically resetting upon removal," reducing manual intervention and improving operational convenience and automation. The design of the small frame flush with the inner wall of the groove maintains a compact structure, and the fit between the moving iron core and the circular groove on the protrusion ensures a firm and reliable lock, reducing the risk of unlocking during wiring. Simultaneously, the design of the through slot and groove being vertically connected optimizes mechanical transmission, improving the locking device's response speed and durability, and adapting to the repeated use requirements of outdoor photovoltaic sites.

[0022] Furthermore, one end of the elastic reset member is fixedly connected to the base, and the other end is fixedly connected to the lower rotating rod. The connection between the elastic reset member and the lower rotating rod is located at 1 / 3 of the length of the lower rotating rod near the base.

[0023] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The position of the elastic reset component is selected at one-third of the length of the lower rotating rod near the base, making full use of the lever principle to provide a suitable reset torque, so that the lower rotating rod can quickly and smoothly return to its original position after leaving the diagonal brace, avoiding instability caused by slow reset or structural impact caused by excessive reset. This design ensures that the locking device can reliably re-engage, improving the continuity and stability of the threading process and reducing multiple adjustments or jamming caused by untimely reset. At the same time, the fixed connection method between the elastic reset component and the base and the lower rotating rod is simple and reliable, facilitating maintenance, reducing the failure rate of the device during long-term use, and improving overall durability and construction efficiency.

[0024] Furthermore, it also includes a detachable counterweight block, which is slidably connected to the slide rail on the outermost sleeve of the telescopic rod. One end of the slide rail is open, and the counterweight block has an inverted T-shaped structure. The counterweight block is fixed to a specific position on the slide rail by bolts through the through holes. The counterweight block is used to counteract the gravitational torque generated by the threading device.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The counterweight balance block adopts an inverted T-shaped structure and is fixed to a specific position on the slide rail with bolts. Its position and quantity can be flexibly adjusted according to actual needs, effectively counteracting the gravitational torque generated by the length of the telescopic rod and the weight at the front end of the cable threading device, preventing the device from sagging, tilting, or swaying during lifting and pushing. This design improves the overall balance of the device, ensuring the cable guide remains horizontal during threading, reducing additional tension or bending damage to the cable caused by unstable device posture. The detachable and sliding connection facilitates transportation, installation, and on-site fine-tuning, adapting to variations in the length of the telescopic rod or the weight of the cable, enhancing the versatility and practicality of the device, while reducing operator fatigue and improving comfort and efficiency during long-term construction.

[0026] Furthermore, the detailed steps of S01 are as follows:

[0027] Step 1: Secure one end of the cable to be laid to the tail of the tie body. Use binding, snapping, or locking methods to ensure a reliable connection between the cable and the tie body, and ensure that the cable does not fall off or slip under stress.

[0028] Step 2: Align and install the base and the telescopic rod to bring them into the predetermined connection state;

[0029] Step 3: Perform a stability check on the entire assembly after connection. Confirm that there is no loosening, offset or detachment at the connection by slight swaying or axial pulling, and ensure that the axial direction of the cable body is basically consistent with the pushing direction of the hand-held end.

[0030] Furthermore, the detailed steps of S02 are as follows:

[0031] Step 1: The operator holds the telescopic pole on the ground and raises the entire device to a position close to the height of the photovoltaic bracket's diagonal brace, and gradually adjusts the raising range according to the actual height;

[0032] Step 2: By adjusting the angle, the axial direction of the tie rod is basically consistent with the arrangement direction of the photovoltaic support diagonal brace, reducing the deviation during the subsequent advancement process;

[0033] Step 3: Align the locking linkage structure at the front with the position of the first photovoltaic bracket diagonal support rod to be passed.

[0034] Furthermore, the detailed steps of S03 are as follows:

[0035] Step 1: The operator slowly pushes the entire device forward along the direction of the diagonal bracing rods, so that the foremost locking link structure gradually approaches and contacts the diagonal bracing rods;

[0036] Step 2: During the contact process, when the lower rotating rod is subjected to the lateral force of the diagonal brace, the miniature push-pull electromagnet on the corresponding locking link is controlled by Bluetooth, so that the moving iron core compression spring retracts into the through slot, and the connection state between the lower rotating rod and the upper rotating rod changes at this point, so that the corresponding part is temporarily separated from the original connection state, thereby allowing the lower rotating rod to bypass the diagonal brace.

[0037] Step 3: While the local part rotates, the remaining unaffected locking linkage mechanism remains stable to maintain the overall support and guidance of the cable body, enabling it to continue to move forward and complete the crossing action.

[0038] Furthermore, the specific steps of S04 are as follows:

[0039] Step 1: After the lower rotating rod that has completed the crossing action leaves the diagonal brace, the original lateral force disappears and it is reset under the pull of the elastic reset component;

[0040] Step 2: During the recovery process, the protrusion on the lower rotating rod is inserted into the groove on the upper rotating rod, triggering the miniature limit switch to drive the miniature push-pull electromagnet to extend the locking protrusion and re-establish a stable connection with the cable body;

[0041] Step 3: After the recovery is completed, the whole structure once again forms a multi-point stable support state, thereby ensuring that the tethered body maintains a stable posture and does not deviate significantly during the continued advancement process.

[0042] Furthermore, the specific steps of S05 are as follows:

[0043] Step 1: The operator continuously pushes the device in the same direction, causing processes S03-S04 to occur sequentially at different positions;

[0044] Step 2: During the continuous advancement process, the tethered body passes through multiple diagonal brace positions in sequence, while maintaining the continuity and stability of the overall movement;

[0045] Step 3: Stop the advance operation once the cable has completely passed through all the target diagonal bracing areas or reached the predetermined position, thus completing the overall cable laying process.

[0046] Compared with existing technologies, the beneficial effects of the cable threading method for photovoltaic brackets provided by this invention are as follows: This invention provides a cable threading method and device for photovoltaic brackets, effectively solving the problems of low efficiency and high safety risks in cable threading operations during the construction of fixed photovoltaic brackets. In traditional construction, the cables from the inverter to the box-type transformer need to be threaded sequentially through the diagonal braces of each row of photovoltaic brackets, requiring approximately two hundred threading operations per megawatt of photovoltaic installation. Conventional methods either involve using ladders for high-altitude operations or having two people work together using bamboo poles to alternately lift the cables, which is not only labor-intensive and time-consuming but also poses safety hazards such as slippage of cable ends, repeated cable wear, and falls from heights. With this solution, the operator only needs to stand on the ground and use a telescopic pole to raise the threading device to the same height as the diagonal brace, and then slowly push the device forward. Under the synergistic action of the locking linkage mechanism, electromagnetic locking device, and elastic reset component, the threading device can automatically selectively cross the diagonal brace: upon contact, the corresponding locking linkage unlocks to allow passage, and upon departure, it automatically resets and relocks, thereby maintaining the overall stability of the cable tie. After the cable is reliably fixed to the tie rod, it passes through multiple rows of diagonal bracing rods continuously with the device, eliminating the need for repeated binding or manual cable lifting. Attached Figure Description

[0047] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 A flowchart illustrating a method for threading cables onto a photovoltaic support structure;

[0049] Figure 2 This is a front view of a cable threading device for a photovoltaic support structure.

[0050] Figure 3 This is a schematic diagram of the threading process of a threading device for photovoltaic bracket cables;

[0051] Figure 4 A cross-sectional view of the upper rotating rod of a cable threading device for a photovoltaic bracket;

[0052] Figure 5 A side sectional view of the upper rotating rod of a cable threading device for a photovoltaic bracket;

[0053] Figure 6 This is a front view of the lower rotating rod of a cable threading device for a photovoltaic bracket;

[0054] Figure 7 A side view of the lower rotating rod of a cable threading device for a photovoltaic bracket;

[0055] Figure 8 This is a schematic diagram of a photovoltaic support system;

[0056] The attached diagram lists the components represented by each number as follows:

[0057] 10. Base; 20. Cable tie; 30. Locking linkage mechanism; 31. Upper rotating rod; 32. Lower rotating rod; 40. Telescopic rod; 50. Elastic reset component; 60. Locking device; 61. Groove; 62. Protrusion; 63. Miniature push-pull electromagnet. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0059] like Figure 1 The diagram shown is a flowchart of a method for threading cables onto a photovoltaic support structure according to the present invention. In this embodiment, it includes the following steps:

[0060] S01: Secure the cable end to the cable threading device;

[0061] S02: The operator raises the threading device to the same height as the diagonal brace of the photovoltaic bracket to be threaded;

[0062] S03: The operator moves the wire-threading device towards the photovoltaic bracket on the ground and controls the opening and closing of the locking device to perform the wire-threading operation.

[0063] S04: When the threading device crosses the diagonal brace of the photovoltaic bracket, it automatically springs back and relocks under the action of the elastic reset component;

[0064] S05: Repeated loop threading allows the threading device to continuously pass through the arranged photovoltaic support diagonal braces.

[0065] like Figure 2-8 As shown, in the above technical solution, the threading device includes a base 10, a threading body 20, a locking linkage mechanism 30, and a telescopic rod 40. One end of the telescopic rod 40 is connected to the base 10 by a thread. The telescopic rod 40 is a multi-stage sleeve structure. Adjacent sleeves are fixed by bolts through through holes on the sleeves. The maximum length of the telescopic rod 40 is 4m.

[0066] The base 10 is an isosceles obtuse triangle structure. The apex of the base 10 is fixedly connected to the telescopic rod 40, and the base of the base 10 is fixedly connected to at least three sets of locking linkage mechanisms 30.

[0067] The locking linkage mechanism 30 includes an upper rotating rod 31 and a lower rotating rod 32. One end of the lower rotating rod 32 is rotatably connected to the bottom edge of the base 10, and the other end of the lower rotating rod 32 is engaged with one end of the upper rotating rod 31 through a locking device 60. The other end of the upper rotating rod 31 is fixedly connected to the tie body 20. The upper rotating rod 31 and the tie body 20 are perpendicular to each other, and the tie body 20 is parallel to the bottom edge of the base 10.

[0068] A right-angled triangular stop is also fixed on the bottom edge of the base 10. The number of stop blocks matches the number of lower rotating rods 32. The right-angled side of the stop block is set close to the lower rotating rod 32. The stop block is used to limit the rotation angle of the lower rotating rod 32.

[0069] Furthermore, in the above technical solution, the locking device includes a groove 61, a protrusion 62, and a miniature push-pull electromagnet 63. The groove 61 is located below the upper rotating rod 31 and has an elongated structure. The protrusion 62 is located at the top of the lower rotating rod 32 and is fixedly connected to it. The protrusion 62 is adapted to the groove 61. The groove 61 communicates with a through slot that passes through the upper rotating rod 31. The through slot and the groove 61 are perpendicular to each other. A miniature push-pull electromagnet 63 is fixed inside the through slot. Magnet 63 includes a coil, a moving iron core, a return spring, and a small lithium battery. The coil and return spring are integrated into a small frame. The moving iron core is fixedly connected to the spring. The coil is connected to a small lithium battery compartment. A Bluetooth relay is also installed in the through slot. A miniature limit switch is also installed in the inner wall of the groove 61. The Bluetooth relay is electrically connected to the miniature limit switch and the miniature push-pull electromagnet. The small frame is flush with the inner wall of the groove 61. The length of the moving iron core when the return spring is extended matches the circular groove on the protrusion 62.

[0070] The miniature push-pull electromagnet 63 is model SDO-0520S, a small frame-type push-pull electromagnet with a voltage of 12V and a current of 0.75A.

[0071] The remote control with Bluetooth has multiple buttons, the same number as the locking linkage mechanism. The Bluetooth remote control can be an ESP32-based multi-button Bluetooth remote control with a built-in rechargeable lithium battery that can last for tens of hours. It has a stable signal, good penetration ability through photovoltaic metal brackets, and a working distance of 20-50 meters, which is sufficient for on-site use.

[0072] Furthermore, in the above technical solution, one end of the elastic reset member 50 is fixedly connected to the base 10, and the other end is fixedly connected to the lower rotating rod 32. The connection between the elastic reset member 50 and the lower rotating rod 32 is located at 1 / 3 of the length of the lower rotating rod 32 near the end of the base 10.

[0073] Furthermore, the above technical solution also includes a detachable counterweight block. The counterweight block is slidably connected to the slide rail on the outermost sleeve of the telescopic rod 40. One end of the slide rail is open. The counterweight block has an inverted T-shaped structure. The counterweight block is fixed to a specific position on the slide rail by bolts through the through hole. The counterweight block is used to counteract the gravitational torque generated by the threading device.

[0074] After raising the device to the working height, observe the overall tilt trend to determine whether the front or rear end has sunk. Adjust the position of the counterweight component according to the tilt direction until the device can maintain basic balance or tilt slightly forward when held in hand. Then fix the counterweight in the current position.

[0075] Furthermore, in the above technical solution, the detailed steps of S01 are as follows:

[0076] Step 1: Secure one end of the cable to be laid to the tail of the tie body. Use binding, snapping, or locking methods to ensure a reliable connection between the cable and the tie body, and ensure that the cable does not fall off or slip under stress.

[0077] Step 2: Align and install the base and the telescopic rod to bring them into the predetermined connection state;

[0078] Step 3: Perform a stability check on the entire assembly after connection. Confirm that there is no loosening, offset or detachment at the connection by slight swaying or axial pulling, and ensure that the axial direction of the cable body is basically consistent with the pushing direction of the hand-held end.

[0079] Furthermore, in the above technical solution, the detailed steps of S02 are as follows:

[0080] Step 1: The operator holds the telescopic pole on the ground and raises the entire device to a position close to the height of the photovoltaic bracket's diagonal brace, and gradually adjusts the raising range according to the actual height;

[0081] Step 2: By adjusting the angle, the axial direction of the tie rod is basically consistent with the arrangement direction of the photovoltaic support diagonal brace, reducing the deviation during the subsequent advancement process;

[0082] Step 3: Align the locking linkage structure at the front with the position of the first photovoltaic bracket diagonal support rod to be passed.

[0083] Furthermore, in the above technical solution, the detailed steps of S03 are as follows:

[0084] Step 1: The operator slowly pushes the entire device forward along the direction of the diagonal bracing rods, so that the foremost locking link structure gradually approaches and contacts the diagonal bracing rods;

[0085] Step 2: During the contact process, when the lower rotating rod is subjected to the lateral force of the diagonal brace, the miniature push-pull electromagnet on the corresponding locking link is controlled by Bluetooth, so that the moving iron core compression spring retracts into the through slot, and the connection state between the lower rotating rod and the upper rotating rod changes at this point, so that the corresponding part is temporarily separated from the original connection state, thereby allowing the lower rotating rod to bypass the diagonal brace.

[0086] Step 3: While the local part rotates, the remaining unaffected locking linkage mechanism remains stable to maintain the overall support and guidance of the cable body, enabling it to continue to move forward and complete the crossing action.

[0087] Furthermore, in the above technical solution, the specific steps of S04 are as follows:

[0088] Step 1: After the lower rotating rod that has completed the crossing action leaves the diagonal brace, the original lateral force disappears and it is reset under the pull of the elastic reset component;

[0089] Step 2: During the recovery process, the protrusion on the lower rotating rod is inserted into the groove on the upper rotating rod, triggering the miniature limit switch to drive the miniature push-pull electromagnet to extend the locking protrusion and re-establish a stable connection with the cable body;

[0090] Step 3: After the recovery is completed, the whole structure once again forms a multi-point stable support state, thereby ensuring that the tethered body maintains a stable posture and does not deviate significantly during the continued advancement process.

[0091] Furthermore, in the above technical solution, the specific steps of S05 are as follows:

[0092] Step 1: The operator continuously pushes the device in the same direction, causing processes S03-S04 to occur sequentially at different positions;

[0093] Step 2: During the continuous advancement process, the tethered body passes through multiple diagonal brace positions in sequence, while maintaining the continuity and stability of the overall movement;

[0094] Step 3: Stop the advance operation once the cable has completely passed through all the target diagonal bracing areas or reached the predetermined position, thus completing the overall cable laying process.

[0095] During operation, the lower rotating rod of the foremost locking linkage mechanism first contacts the side of the diagonal brace, generating a lateral force. At this point, the operator controls the corresponding Bluetooth relay of the locking linkage via a Bluetooth device, activating the miniature push-pull electromagnet. The electromagnet coil is energized, the moving iron core compresses the return spring and retracts into the through slot, the protrusion completely disengages from the groove of the upper rotating rod, and the connection between the upper and lower rotating rods is released. Under the action of the lateral force, the lower rotating rod continues to rotate around the diagonal brace, while the upper rotating rod remains perpendicular to the cable tie and relatively stationary. The remaining uncontacted locking linkage mechanisms remain locked: the protrusion remains in the groove, the electromagnet does not activate, and multi-point support maintains the overall horizontal guidance of the cable tie, preventing the device from sagging or shifting laterally. The cable advances smoothly with the cable tie without significant pulling or bending.

[0096] The lower rotating rod completely bypasses the diagonal brace, allowing the cable tie to pass smoothly through its position. The device continues to advance slowly, with the remaining locking linkages engaging and unlocking independently in the same manner. Multiple locking linkages create a dynamic balance of "partial unlocking and partial locking," ensuring the cable tie remains parallel to the base's bottom edge, maintaining stable posture and smooth cable guidance.

[0097] During the process, once the lower rotating rod, which has already been crossed, has completely left the side of the diagonal brace, the lateral force instantly disappears. The elastic reset component releases the stored tension, quickly pulling the lower rotating rod back to its original position around the rotation point. During the reset process, the lower rotating rod drives the protrusion towards the groove, and the stop block again limits the swing angle, ensuring precise alignment. The protrusion is fully embedded in the elongated groove of the upper rotating rod, triggering a miniature limit switch on the inner wall of the groove. The limit switch signal controls the miniature push-pull electromagnet to de-energize via a Bluetooth relay. The moving iron core automatically extends under the extension of the reset spring and inserts into the circular groove on the protrusion, firmly locking the upper and lower rotating rods. After locking, the locking linkage mechanism returns to its initial rigid connection state, forming a multi-point stable support together with other locking groups. The cable tie body's posture stabilizes again, and the elastic reset component returns to its natural tension state. The entire reset process requires no manual intervention; the device automatically returns to the threading preparation state.

[0098] Specifically, the principle of this invention is as follows: The core of the threading device is at least three sets of locking linkage mechanisms fixed on the base. Each set consists of a lower rotating rod, an upper rotating rod, a threading body, and a locking device. The base adopts an isosceles obtuse-angled triangular structure to ensure overall center of gravity stability; the telescopic rod is a multi-stage sleeve type, with a maximum length of four meters, facilitating ground operators to lift the device to the height of the diagonal support and apply propulsive force. When the device is pushed forward, the foremost lower rotating rod first contacts the diagonal support, generating a lateral force. At this time, the operator remotely controls a miniature push-pull electromagnet via a Bluetooth relay, driving the moving iron core to compress the return spring and retract into the through slot, unlocking the upper rotating rod from the protrusion groove of the lower rotating rod. The lower rotating rod rotates around the bottom edge of the base, allowing the threading body and cable to smoothly cross the diagonal support. The remaining uncontacted locking linkage mechanisms remain locked, maintaining the axial stability of the threading body through multi-point support, preventing the device from shifting or sagging. Once the lower rotating rod has completely passed the diagonal support, the lateral force disappears, and the elastic return component immediately generates tension, causing the lower rotating rod to swing back quickly. During the swing-back process, the protrusion re-engages into the groove of the upper rotating rod, triggering the miniature limit switch. This causes the moving iron core of the electromagnet to extend under the action of the return spring, relocking the upper and lower rotating rods and forming a stable connection. The right-angled triangular stop limits the rotation angle of the lower rotating rod, ensuring accurate reset.

[0099] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for threading cables onto a photovoltaic support structure, characterized in that, Includes the following steps: S01: Secure the cable end to the cable threading device; S02: The operator raises the threading device to the same height as the diagonal brace of the photovoltaic bracket to be threaded; S03: The operator moves the wire-threading device towards the photovoltaic bracket on the ground and controls the opening and closing of the locking device to perform the wire-threading operation. S04: When the threading device crosses the diagonal brace of the photovoltaic bracket, it automatically springs back and relocks under the action of the elastic reset component; S05: Repeated loop threading allows the threading device to continuously pass through the arranged photovoltaic support diagonal braces.

2. The method for threading a photovoltaic support cable according to claim 1, characterized in that, The threading device includes a base (10), a threading body (20), a locking linkage mechanism (30), and a telescopic rod (40). One end of the telescopic rod (40) is connected to the base (10) by a thread. The telescopic rod (40) is a multi-stage sleeve structure. Adjacent sleeves are fixed by bolts through through holes on the sleeves. The maximum length of the telescopic rod (40) is 4m. The base (10) is an isosceles obtuse triangle structure. The apex of the base (10) is fixedly connected to the telescopic rod (40), and the bottom edge of the base (10) is fixedly connected to at least three sets of locking linkage mechanisms (30). The locking linkage mechanism (30) includes an upper rotating rod (31) and a lower rotating rod (32). One end of the lower rotating rod (32) is rotatably connected to the bottom edge of the base (10). The other end of the lower rotating rod (32) is engaged with one end of the upper rotating rod (31) through a locking device (60). The other end of the upper rotating rod (31) is fixedly connected to the tie body (20). The upper rotating rod (31) and the tie body (20) are perpendicular to each other, and the tie body (20) and the bottom edge of the base (10) are parallel to each other. A right-angled triangular block is also fixed on the bottom edge of the base (10). The number of blocks matches the number of lower rotating rods (32). The right-angled side of the block is set close to the lower rotating rod (32). The block is used to limit the rotation angle of the lower rotating rod (32).

3. The method for threading a photovoltaic support cable according to claim 2, characterized in that, The locking device includes a groove (61), a protrusion (62), and a miniature push-pull electromagnet (63). The groove (61) is located below the upper rotating rod (31) and is a long strip structure. The protrusion (62) is located at the top of the lower rotating rod (32) and is fixedly connected to the lower rotating rod (32). The protrusion (62) is adapted to the groove (61). The groove (61) is connected to a through slot that passes through the upper rotating rod (31). The through slot and the groove (61) are perpendicular to each other. A miniature push-pull electromagnet (63) is fixed inside the through slot. The push-pull electromagnet (63) includes a coil, a moving iron core, a return spring, and a small lithium battery. The coil and the return spring are integrated in a small frame. The moving iron core is fixedly connected to the spring. The coil is connected to a small lithium battery compartment. A Bluetooth relay is also provided in the through slot. A miniature limit switch is also provided in the inner wall of the groove (61). The Bluetooth relay is electrically connected to the miniature limit switch and the miniature push-pull electromagnet. The small frame is flush with the inner wall of the groove (61). The length of the moving iron core when the return spring is extended is adapted to the circular groove on the protrusion (62).

4. The method for threading a photovoltaic support cable according to claim 3, characterized in that, One end of the elastic reset member (50) is fixedly connected to the base (10), and the other end is fixedly connected to the lower rotating rod (32). The connection between the elastic reset member (50) and the lower rotating rod (32) is located at 1 / 3 of the length of the lower rotating rod (32) near the base (10).

5. The method for threading a photovoltaic bracket cable according to claim 2, characterized in that, It also includes a detachable counterweight block, which is slidably connected to the slide rail on the outermost sleeve of the telescopic rod (40). One end of the slide rail is open. The counterweight block has an inverted T-shaped structure. The counterweight block is fixed to a specific position on the slide rail by bolts through the through hole. The counterweight block is used to counteract the gravitational torque generated by the threading device.

6. The method for threading a photovoltaic bracket cable according to claim 5, characterized in that, The detailed steps for S01 are as follows: Step 1: Secure one end of the cable to be laid to the tail of the tie body. Use binding, snapping, or locking methods to ensure a reliable connection between the cable and the tie body, and ensure that the cable does not fall off or slip under stress. Step 2: Align and install the base and the telescopic rod to bring them into the predetermined connection state; Step 3: Perform a stability check on the entire assembly after connection. Confirm that there is no loosening, offset or detachment at the connection by slight swaying or axial pulling, and ensure that the axial direction of the cable body is basically consistent with the pushing direction of the hand-held end.

7. The method for threading a photovoltaic support cable according to claim 6, characterized in that, The detailed steps for S02 are as follows: Step 1: The operator holds the telescopic pole on the ground and raises the entire device to a position close to the height of the photovoltaic bracket's diagonal brace, and gradually adjusts the raising range according to the actual height; Step 2: By adjusting the angle, the axial direction of the tie rod is basically consistent with the arrangement direction of the photovoltaic support diagonal brace, reducing the deviation during the subsequent advancement process; Step 3: Align the locking linkage structure at the front with the position of the first photovoltaic bracket diagonal support rod to be passed.

8. The method for threading a photovoltaic bracket cable according to claim 7, characterized in that, The detailed steps for S03 are as follows: Step 1: The operator slowly pushes the entire device forward along the direction of the diagonal bracing rods, so that the foremost locking link structure gradually approaches and contacts the diagonal bracing rods; Step 2: During the contact process, when the lower rotating rod is subjected to the lateral force of the diagonal brace, the miniature push-pull electromagnet on the corresponding locking link is controlled by Bluetooth, so that the moving iron core compression spring retracts into the through slot, and the connection state between the lower rotating rod and the upper rotating rod changes at this point, so that the corresponding part is temporarily separated from the original connection state, thereby allowing the lower rotating rod to bypass the diagonal brace. Step 3: While the local part rotates, the remaining unaffected locking linkage mechanism remains stable to maintain the overall support and guidance of the cable body, enabling it to continue to move forward and complete the crossing action.

9. A method for threading a photovoltaic support cable according to claim 8, characterized in that, The specific steps for S04 are as follows: Step 1: After the lower rotating rod that has completed the crossing action leaves the diagonal brace, the original lateral force disappears and it is reset under the pull of the elastic reset component; Step 2: During the recovery process, the protrusion on the lower rotating rod is inserted into the groove on the upper rotating rod, triggering the miniature limit switch to drive the miniature push-pull electromagnet to extend the locking protrusion and re-establish a stable connection with the cable body; Step 3: After the recovery is completed, the whole structure once again forms a multi-point stable support state, thereby ensuring that the tethered body maintains a stable posture and does not deviate significantly during the continued advancement process.

10. A method for threading a photovoltaic bracket cable according to claim 9, characterized in that, The specific steps for S05 are as follows: Step 1: The operator continuously pushes the device in the same direction, causing processes S03-S04 to occur sequentially at different positions; Step 2: During the continuous advancement process, the tethered body passes through multiple diagonal brace positions in sequence, while maintaining the continuity and stability of the overall movement; Step 3: Stop the advance operation once the cable has completely passed through all the target diagonal bracing areas or reached the predetermined position, thus completing the overall cable laying process.

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