Anti-pulling guide fixing device for photovoltaic cable laying

Abstract

The invention discloses an anti-pulling guide fixing device for photovoltaic cable laying. The anti-pulling guide fixing device comprises a supporting assembly, a buffer assembly and a limiting assembly, the supporting assembly comprises a support, a supporting shaft set rotationally arranged at the top of the support and guide wheels arranged on the supporting shaft set in a sleeving mode, the length of the supporting shaft set is adjustable, and the number of the guide wheels can be synchronously adjusted. The buffering assembly comprises a C-shaped frame, connecting rod sets installed at the two ends of the top of the C-shaped frame and a plurality of lower pressing wheels evenly arranged on the connecting rod sets in a sleeving mode, the length of the connecting rod sets is adjustable, the number of the lower pressing wheels is synchronously adjusted, and meanwhile the lower pressing wheels are matched with the guide wheels in a one-to-one mode; the buffering assembly comprises the n-shaped frame and the lower pressing wheels, the n-shaped frame is arranged below the guide wheel in a lifting mode, the lower pressing wheels are arranged on the two sides of the guide wheel, after the cable sequentially penetrates through the guide wheel and the lower pressing wheels, buffering is provided for the cable through the lifting characteristic of the lower pressing wheels, and the situation that the cable is fixedly arranged and damaged under the action of external force is avoided.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power engineering technology, specifically to a photovoltaic cable laying anti-pull guiding and fixing device. Background Technology

[0002] As the core carrier of energy transmission in photovoltaic systems, photovoltaic cables face complex mechanical effects during their installation and subsequent use. Specifically, in outdoor installations, cables are susceptible to periodic pulling and swaying caused by strong winds and gusts; during construction, cables are subjected to continuous axial tension during dragging and pulling; and during long-term operation, the displacement of photovoltaic modules due to temperature changes and foundation settlement also exerts continuous tensile force on the connecting cables. If these tensile forces cannot be effectively buffered or offset, they will directly cause tensile deformation of the cable conductor, damaging the conductor's structural integrity and conductivity. Simultaneously, tensile forces can also cause cracking and damage to the cable insulation layer, leading to electrical faults such as leakage and short circuits. In severe cases, they can cause loose cable joints, poor contact, localized overheating, and ultimately, fires, posing a serious threat to the property and personnel safety of photovoltaic power stations.

[0003] To achieve cable positioning, the existing cable fixing devices used in photovoltaic power plant construction are mostly simple clips, cable ties, or traditional bracket structures. The core function of such fixing devices is limited to restricting the cable to a preset position, lacking targeted anti-pull buffering and laying guidance functions. They are difficult to adapt to the complex mechanical environment during photovoltaic cable laying and use, and have significant technical defects.

[0004] On the one hand, the existing fixing devices have extremely poor tensile strength. Due to their simple structural design and lack of any buffer energy absorption mechanism, when the cable is subjected to axial tensile force, the force is directly transmitted to the cable body and the connection joints between the cable and components / equipment. This force cannot be effectively attenuated or offset, and under long-term action, it is very easy to cause the cable conductor to stretch and the insulation layer to break. At the same time, it will also aggravate the wear and loosening of the joints, further amplifying the safety risks.

[0005] On the other hand, the existing fixed installations lack sufficient guidance during cable laying. During the dragging process, the contact surface between the cable and the fixed installation, as well as the edges of the laying path, are prone to hard friction and scratching. Existing installations cannot provide a smooth guiding channel for cable dragging, leading to accelerated wear of the cable insulation layer under friction, reducing the cable's insulation performance and service life. Simultaneously, hard friction increases the construction resistance of cable laying, affecting not only construction efficiency but also potentially causing direct cable damage due to excessive dragging force, thus impacting construction quality. Summary of the Invention

[0006] The purpose of this invention is to provide a photovoltaic cable laying anti-pull guiding and fixing device, which aims to improve the problem that photovoltaic cable fixing devices lack anti-pull buffering and guiding functions, making it difficult to solve the damage caused by pulling force and friction during cable laying and use.

[0007] This invention is implemented as follows: a photovoltaic cable laying anti-pull guiding and fixing device, comprising... The support assembly includes a bracket, a support shaft assembly rotatably mounted on the top of the bracket, and guide wheels sleeved on the support shaft assembly. The length of the support shaft assembly is adjustable, and the number of guide wheels can be adjusted synchronously. The buffer assembly includes a frame, connecting rods installed at both ends of the top of the frame, and multiple pressure rollers evenly sleeved on the connecting rods. The length of the connecting rods is adjustable, and the number of pressure rollers is adjusted synchronously. At the same time, the pressure rollers are matched with the guide rollers one by one. The frame lifting mechanism is located on the side of the support, and the pressure rollers are located on the side of the guide rollers. Cables are wound around the guide rollers and the pressure rollers in sequence. The limiting component is fitted to the top of the guide wheel at its middle part, and the end of the limiting component slides in contact with the pressure wheel.

[0008] Preferably, the support shaft assembly includes an end shaft and multiple splicing shafts. A connecting bolt is snapped on the side of the splicing shaft near the end shaft, and threaded holes are provided on the end face of the splicing shaft away from the end shaft and on the end shaft. The threaded end of the connecting bolt is inserted into the threaded hole.

[0009] Preferably, multiple snap-fit ​​grooves are evenly distributed along the circumference of the splicing shaft. The snap-fit ​​grooves are convex structures, and the internal hexagonal end of the connecting bolt is located inside the snap-fit ​​groove. The threaded hole communicates with the snap-fit ​​groove, and the diameter of the threaded hole is larger than the size of the internal hexagonal end.

[0010] Preferably, the end shaft and splicing shaft are matched one by one with multiple guide wheels, and the end shaft and splicing shaft are interference-fitted with the corresponding guide wheels.

[0011] Preferably, the bracket includes an L-shaped plate and a base. A convex shaft fixed at the upper center of the base is inserted into the L-shaped plate via a bearing connection. A brake bolt threaded through the end of the L-shaped plate is inserted into the brake groove of the base. Multiple brake grooves are evenly distributed along the circumference of the convex shaft.

[0012] Preferably, a fixing frame is provided below the frame, the fixing frame and the frame are fitted onto the same limiting rod, and nuts are threaded onto both ends of the limiting rod; a spring in a compressed state is fitted onto the upper end of the limiting rod, and the two ends of the spring are in contact with the frame and the nuts respectively.

[0013] Preferably, a sleeve frame is fixedly installed on the side of the frame, and a locking post is fixedly installed on the inner side wall of the sleeve frame; a vertical locking groove is provided on the vertical section of the L-shaped plate, and an inlet / outlet groove is provided at the end of the locking groove; the sleeve frame is sleeved on the L-shaped plate, and the locking post is located in the locking groove; the fixing frame is connected to the L-shaped plate by bolts.

[0014] Preferably, the connecting rod assembly includes an end rod and multiple splicing rods. Each splicing rod has a polygonal groove at one end near the end rod, and a polygonal shaft is fixedly provided at the other end of the splicing rod and the end face of the end rod near the splicing rod. The polygonal shafts are connected by bolts and inserted into the polygonal grooves. The end rod and the multiple splicing rods are interference-fitted with their respective pressure rollers.

[0015] Preferably, the limiting component includes an arc-shaped plate and a rubber arc plate installed inside the arc-shaped plate. The arc-shaped plate is positioned near the top of the guide wheel, and the rubber arc plate extends into the annular guide groove of the guide wheel and contacts the cable.

[0016] Preferably, an arc-shaped groove is provided on the outer side of the arc-shaped plate, and a binding strap is provided at the arc-shaped groove. A connecting rod is provided through the end of the binding strap that protrudes from the arc-shaped groove. The connecting rod is located in the annular guide groove of the lower pressure wheel, and the end of the connecting rod extends into the annular groove of the lower pressure wheel.

[0017] Compared with the prior art, the beneficial effects of the present invention are: The buffer assembly of this invention includes a frame and a pressure roller. The frame is raised and lowered below the guide roller, and the pressure roller is located on both sides of the guide roller. After the cable passes through the guide roller and the pressure roller in sequence, the lifting and lowering characteristics of the pressure roller are used to provide buffer for the cable, so as to avoid damage to the cable under external force.

[0018] The limiting component of this invention includes an arc-shaped plate and a rubber arc plate, and the arc-shaped plate is connected to the lower pressure roller via a binding strap; when the lower pressure roller descends, the binding strap drives the arc plate to descend, increasing the pressure exerted by the rubber arc plate on the guide roller and the cable; when the lower pressure roller rises, the pressure of the rubber arc plate on the guide roller and the cable decreases, releasing the restriction on the cable and facilitating the movement of the cable relative to the guide roller. Attached Figure Description

[0019] Figure 1 This is a first structural schematic diagram of the entire invention; Figure 2 This is a second structural schematic diagram of the entire invention; Figure 3 This is a schematic diagram of the third structure of the entire invention; Figure 4 This is a schematic diagram of the structure of the support component of the present invention; Figure 5 This is a schematic diagram of the structure of the bracket of the present invention; Figure 6This is a structural schematic diagram of the guide wheel and support shaft assembly of the present invention; Figure 7 This is a schematic diagram of the structure of the support shaft assembly of the present invention; Figure 8 This is a schematic diagram of the splicing shaft of the present invention; Figure 9 This is a schematic diagram of the structure of the buffer component and the limiting component of the present invention; Figure 10 This is a structural schematic diagram of the pressure wheel and connecting rod assembly of the present invention; Figure 11 This is a schematic diagram of the connecting rod assembly of the present invention; Figure 12 This is a schematic diagram of the splicing rod of the present invention; Figure 13 This is a schematic diagram of the structure of the limiting component of the present invention.

[0020] In the diagram: 1. Support assembly; 11. Bracket; 111. Base; 112. Brake groove; 113. Brake bolt; 114. L-shaped plate; 115. Slot; 116. Inlet / outlet slot; 12. Guide wheel; 13. Support shaft assembly; 131. End shaft; 132. Splicing shaft; 133. Threaded hole; 134. Snap-in slot; 135. Connecting bolt; 2. Buffer assembly; 21. Frame; 211. Sleeve frame; 212. Limiting rod; 213. Fixing frame; 214. Snap-in post; 215. Spring; 22. Pressure roller; 221. Annular groove; 23. Connecting rod assembly; 231. End rod; 232. Splicing rod; 233. Polygonal shaft; 234. Polygonal groove; 3. Limiting assembly; 31. Arc groove; 32. Arc plate; 33. Rubber arc plate; 34. Restraint strap; 35. Connecting rod. Detailed Implementation

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: In order to reduce the probability of damage to photovoltaic cables caused by external pulling and wear during the laying and long-term operation of photovoltaic cables, this embodiment provides a guiding and fixing device for photovoltaic cables. Of course, this device can also be used for other types of cables.

[0023] like Figure 1-3 As shown, the guide fixing device includes a support component 1, a buffer component 2, a limiting component 3, etc.

[0024] like Figure 4 , Figure 6 As shown, the support assembly 1 includes a bracket 11, a support shaft assembly 13 rotatably mounted on top of the bracket 11, and guide wheels 12 sleeved on the support shaft assembly 13. Under the action of the support shaft assembly 13, the guide wheels 12 are stably installed, thus guiding the movement of the cable. Furthermore, the length of the support shaft assembly 13 is adjustable, and the number of guide wheels 12 can be adjusted simultaneously. Therefore, the number of guide wheels 12 can be adjusted according to requirements, facilitating the laying and support of multiple cables.

[0025] like Figure 9 , Figure 10 As shown, the buffer assembly 2 includes a frame 21, connecting rod assemblies 23 mounted at both ends of the top of the frame 21, and multiple pressure rollers 22 evenly distributed on the connecting rod assemblies 23. The frame 21 is flexibly positioned on the side of the support 11, and the pressure rollers 22 are located on the side of the guide rollers 12. Therefore, the cable is wound around the guide rollers 12 and the pressure rollers 22 successively, and is forced into an Ω shape under the action of the guide rollers 12 and the pressure rollers 22. At the same time, the synchronous lifting and lowering of the pressure rollers 22 and the frame 21 provides cushioning when the cable is pulled. Similarly, the length of the connecting rod assembly 23 is adjustable, and the number of pressure rollers 22 is adjusted synchronously. Therefore, when the number of guide rollers 12 is adjusted, the number of pressure rollers 22 can be adjusted synchronously, achieving a one-to-one match between the pressure rollers 22 and the guide rollers 12, which facilitates the support and guidance of cable movement.

[0026] like Figure 1-3 As shown, the middle part of the limiting component 3 is attached to the top of the guide wheel 12, and the end of the limiting component 3 is in sliding contact with the pressure wheel 22. Therefore, the limiting component 3 descends under the action of the gravity of the pressure wheel 22 and other external forces, thereby attaching to the guide wheel 12 and braking the guide wheel 12 and the cable. In addition, the limiting component 3 can also release the restriction on the cable and the guide wheel 12 when the pressure wheel 22 rises, providing convenience for the cable to move under the action of external forces and reducing cable damage.

[0027] like Figure 7 , Figure 8As shown, to adjust the length of the support shaft assembly 13, the support shaft assembly 13 includes an end shaft 131 and multiple splicing shafts 132. A connecting bolt 135 is snapped onto the side of the splicing shaft 132 near the end shaft 131. Threaded holes 133 are provided on both the end face of the splicing shaft 132 away from the end shaft 131 and on the end shaft 131. The threaded end of the connecting bolt 135 is inserted into the threaded hole 133. Therefore, under the action of the connecting bolt 135, a stable connection is achieved between adjacent end shafts 131 and splicing shafts 132, as well as between adjacent splicing shafts 132, while simultaneously defining the relative positions of the end shafts 131 and splicing shafts 132. The end shafts 131 and splicing shafts 132 are matched one-to-one with multiple guide wheels 12, and the end shafts 131 and splicing shafts 132 are interference-fitted with their corresponding guide wheels 12, thereby stably supporting the guide wheels 12 while adjusting the number of guide wheels 12.

[0028] like Figure 8 As shown, to effectively limit the relative position of the end shaft 131 and the splicing shaft 132, multiple snap-fit ​​grooves 134 are evenly distributed along the circumference of the splicing shaft 132. Each snap-fit ​​groove 134 is a convex structure with one open end. The internal hexagonal end of the connecting bolt 135 is located within the snap-fit ​​groove 134, ensuring the connecting bolt 135 is stably positioned relative to the splicing shaft 132. A threaded hole 133 communicates with the snap-fit ​​groove 134, and the diameter of the threaded hole 133 is larger than the internal hexagonal size. A multi-pronged wrench can be inserted through the threaded hole 133 into the internal hexagonal portion of the connecting bolt 135 to control its rotation, thereby achieving a stable connection between the splicing shaft 132 and the end shaft 131.

[0029] like Figure 11 , Figure 12 As shown, with the length of the support shaft assembly 13 adjustable, the connecting rod assembly 23 includes an end rod 231 and multiple splicing rods 232. Each splicing rod 232 has a polygonal groove 234 at one end near the end rod 231. A polygonal shaft 233 is fixedly installed at the other end of the splicing rod 232 and at the end face of the end rod 231 near the splicing rod 232. The polygonal shaft 233 is bolted into the polygonal groove 234, enabling detachable connection between adjacent splicing rods 232 and facilitating adjustment of the number of pressure rollers 22 as needed. The end rod 231 and the multiple splicing rods 232 are interference-fitted to their respective pressure rollers 22. The end rod 231 is connected through a bearing and extends through the end of the frame 21.

[0030] like Figure 5As shown, to ensure stable installation of the device, the bracket 11 includes an L-shaped plate 114 and a base 111. The base 111 can be bolted to the appropriate location. A convex shaft fixed to the upper center of the base 111 is inserted into the L-shaped plate 114 via a bearing connection, enabling the L-shaped plate 114 to rotate with the base 111, facilitating the support and transport of cables. An end shaft 131 is installed through a bearing seat at the top of the L-shaped plate 114. Alternatively, the L-shaped plate 114 can be stably installed relative to the base 111 by inserting a threaded brake bolt 113, located at the end of the L-shaped plate 114, into a brake groove 112 in the base 111. Multiple brake grooves 112 are evenly distributed along the circumference of the convex shaft. When the orientation of the support shaft assembly 13 is adjusted as needed, the bottom of the brake bolt 113 can be inserted into the corresponding brake groove 112.

[0031] like Figure 5 , Figure 9 As shown, to achieve the buffering function of the pressure roller 22, a fixing frame 213 is provided below the frame 21. The fixing frame 213 and the frame 21 are sleeved on the same limiting rod 212, and nuts are threaded onto both ends of the limiting rod 212. A compressed spring 215 is sleeved on the upper end of the limiting rod 212, and the two ends of the spring 215 contact the frame 21 and the nut, respectively. In addition, a sleeve frame 211 is fixedly provided on the side of the frame 21, and a locking post 214 is fixedly provided on the inner side wall of the sleeve frame 211. A vertical slot 115 is provided on the vertical section of the L-shaped plate 114, and an inlet / outlet slot 116 is provided at the end of the slot 115. The sleeve frame 211 is sleeved on the L-shaped plate 114, and the locking post 214 is located in the slot 115, realizing the sliding contact between the frame 21 and the L-shaped plate 114. The fixing frame 213 is bolted to the L-shaped plate 114. Therefore, after the fixing frame 213 is stably installed, the spring 215, which restores its deformation, forces the bracket 21 to always have a downward tendency, which in turn drives the pressure roller 22 to descend, forcing the cable to maintain an Ω-shaped state. Similarly, when the cable is subjected to external force, it facilitates the upward movement of the pressure roller 22 to buffer the cable.

[0032] like Figure 13 As shown, to ensure stable placement of the cable relative to the guide wheel 12, the limiting component 3 includes an arc-shaped plate 32 and a rubber arc plate 33 installed inside the arc-shaped plate 32. The arc-shaped plate 32 is positioned near the top of the guide wheel 12, and the rubber arc plate 33 extends into the annular guide groove of the guide wheel 12, contacting the cable to increase the resistance to the cable's movement relative to the guide wheel 12, thus providing support for stable placement of the cable when no external force is applied. This limiting component 3 is only installed above the guide wheel 12 after the cable laying is completed.

[0033] like Figure 10 , Figure 13As shown, in order to release the cable's restriction when the pressure roller 22 rises, an arc-shaped groove 31 is provided on the outer side of the arc-shaped plate 32. A binding strap 34 is provided in the arc-shaped groove 31. A connecting rod 35 is provided through the end of the binding strap 34 that protrudes from the arc-shaped groove 31. The connecting rod 35 is located in the annular guide groove of the pressure roller 22, and the end of the connecting rod 35 extends into the annular groove 221 of the pressure roller 22. Under the action of the connecting rod 35, the end of the binding strap 34 is stably connected to the pressure roller 22. Thus, when the pressure roller 22 descends, the binding strap 34 enhances the pressure of the rubber arc plate 33 on the guide roller 12 and the cable, increasing the resistance to cable movement. A channel communicating with the annular groove 221 is provided on the side wall of the pressure roller 22. This channel facilitates the insertion of the connecting rod 35 into the annular guide groove.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A photovoltaic cable installation anti-pull guide fixture, characterized by, The utility model provides a kind of cable winding device, including Supporting assembly (1), it includes support (11), support shaft group (13) rotationally arranged on the top of support (11) and guide wheel (12) set on support shaft group (13), the length of supporting shaft group (13) is adjustable, and the number of guide wheel (12) can be adjusted synchronously; Buffering assembly (2), it includes frame (21), connecting rod group (23) mounted on the top of frame (21) both ends and multiple down-pressing wheels (22) evenly set on connecting rod group (23), the length of connecting rod group (23) is adjustable, and the number of down-pressing wheel (22) is adjusted synchronously, while down-pressing wheel (22) and guide wheel (12) are matched one by one;The frame (21) is arranged on the side of support (11) in lifting mode, and the down-pressing wheel (22) is located on the side of guide wheel (12), and cable is wound on guide wheel (12) and down-pressing wheel (22) in sequence; Limiting assembly (3), the top of which is arranged to match guide wheel (12), and the end of limiting assembly (3) is in sliding contact with down-pressing wheel (22).

2. A photovoltaic cable installation anti-pulling guide fixing device according to claim 1, characterized in that, Supporting shaft group (13) includes end shaft (131) and multiple spliced shafts (132), connecting bolts (135) are arranged on the side of spliced shaft (132) close to end shaft (131) in buckle mode, and threaded holes (133) are arranged on the end face of spliced shaft (132) away from end shaft (131) and end shaft (131), and the end of connecting bolt (135) is inserted into threaded hole (133) in threaded mode.

3. A photovoltaic cable installation anti-pull guide fixture according to claim 2, wherein, Multiple buckle grooves (134) are arranged on spliced shaft (132) in circumferential direction, and the buckle groove (134) is arranged in convex mode, and the hexagonal end of connecting bolt (135) is located in buckle groove (134);The threaded hole (133) is communicated with buckle groove (134), and the diameter of threaded hole (133) is larger than the size of hexagonal.

4. A photovoltaic cable installation anti-pull guiding and fixing device according to claim 2, characterized in that, End shaft (131) and spliced shaft (132) are matched with multiple guide wheels (12) one by one, and end shaft (131) and spliced shaft (132) are connected with corresponding guide wheel (12) in interference mode.

5. A photovoltaic cable installation anti-pull guide fixture according to claim 1, wherein, Support (11) includes L-shaped plate (114) and base (111), convex shaft fixed on the upper middle part of base (111) is inserted into L-shaped plate (114) through bearing connection, brake bolt (113) arranged on the end of L-shaped plate (114) in threaded mode is inserted into brake slot (112) of base (111), and multiple brake slots (112) are arranged uniformly along the circumferential direction of convex shaft.

6. A photovoltaic cable installation anti-tugging guide fixture according to claim 5, characterized in that, The lower part of frame (21) is provided with fixed frame (213), and fixed frame (213) and frame (21) are set on the same limiting rod (212) in sleeve mode, and the two ends of limiting rod (212) are threaded with nuts;Spring (215) in compression state is arranged on the upper end of limiting rod (212), and the two ends of spring (215) are in contact with frame (21) and nut respectively.

7. A photovoltaic cable installation anti-tugging guide fixture according to claim 6, characterized in that, The fixed frame (213) is connected by bolts and is sleeved on the L-shaped plate (114).

8. A photovoltaic cable installation anti-pull guide fixture according to claim 1, wherein, The connecting rod group (23) comprises end rods (231) and a plurality of spliced rods (232), one end of each of the spliced rods (232) near the end rods (231) is provided with a polygonal groove (234), and the other end of each of the spliced rods (232) and the end face of the end rods (231) near the spliced rods (232) are fixedly provided with polygonal shafts (233), the polygonal shafts (233) are inserted into the polygonal grooves (234) through bolts, and the end rods (231) and the plurality of spliced rods (232) are connected to the respective pressing wheels (22) in an interference fit.

9. A photovoltaic cable installation anti-tugging guide fixture according to claim 1, characterized in that, The limiting assembly (3) comprises an arc-shaped plate (32) and a rubber arc plate (33) mounted on the inner side of the arc-shaped plate (32), the arc-shaped plate (32) is arranged adjacent to the top of the guide wheel (12), the rubber arc plate (33) extends into the annular guide groove of the guide wheel (12), and the rubber arc plate (33) is in contact with the cable.

10. A photovoltaic cable installation anti-tug guide fixture according to claim 9, wherein, An arc-shaped groove (31) is arranged on the outer side of the arc-shaped plate (32), a restraint belt (34) is arranged at the arc-shaped groove (31), the end portion of the restraint belt (34) protruding from the arc-shaped groove (31) is provided with a connecting rod (35), the connecting rod (35) is located in the annular guide groove of the pressing wheel (22), and the end portion of the connecting rod (35) extends into the annular groove (221) of the pressing wheel (22).

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