A cable carrying crossing frame for power distribution network line erection

Abstract

The present invention relates to the field of cable transportation technology, and specifically to a cable transportation spanning frame for laying out distribution network lines, which is used for conveying and transporting cables, comprising a lifting vehicle and a telescopic frame installed on the head of the lifting vehicle, an extension frame installed on the rear of the lifting vehicle, a guide wheel rotatably installed on the top of the extension frame, and a plurality of vertically distributed conveying components that apply upward friction to the surface of the cable, the uppermost conveying component is fixedly connected to the extension frame, and a suspension component for adjusting the spacing is installed between the two conveying components; the number of conveying components within a certain height is adjusted by the suspension component to balance the torque when the telescopic frame is extended, and the conveying component is used to directly convey the cable on the ground upward by friction, without the need for the cable to be wound on the power transmission line reel and lifted by a crane to the lifting vehicle to cooperate with the telescopic frame to convey the cable, thereby saving time by not changing the reel and improving the efficiency of the line-laying operation.

Description

Technical Field

[0001] The present invention relates to the technical field of cable transportation, and in particular to a cable transport spanning frame for laying out distribution network lines. Background Art

[0002] In the construction of newly built transmission lines, it is often necessary to cross multiple railways, highways and power lines in a single section. If the cables are laid directly on the ground, pedestrians or vehicles passing by may cause the cables to be crushed or pulled, which may also pose a safety hazard. Therefore, in order to ensure the normal operation of road traffic while completing the assumed tasks of the line, power system staff usually use bamboo, steel pipes and other materials to build spanning frames and sealing structures above the facilities to be crossed; when the span is far, multiple rows of spanning frames need to be erected on both sides of the spanned object. For this purpose, people have designed spanning equipment / devices as shown in publication numbers: CN115967048A, CN119419645A, and CN118336588A. The cables are directly erected and transported through a liftable device, so that they have a certain height between them and the ground and do not affect the passage of the crossing area.

[0003] The cable is wound on the transmission reel before use. Before delivering new cable, the transmission reel with all the cables deployed (referred to as "empty reel") needs to be lifted from the pay-out frame by a crane. Then the full transmission reel (referred to as "full reel") is hoisted and installed on the newly vacated lifting vehicle. The cable is then delivered across the distance using a telescopic frame.

[0004] Since the empty reel needs to be lowered by a crane first and then the full reel needs to be lifted onto the empty lift truck, the reel changing process consumes a lot of time, which seriously restricts the efficiency of the line-laying operation. In addition, the longer the distance spanned, the greater the torque of the telescopic frame of the conveying cable, and there is also a risk of the lift truck tipping over.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0006] The purpose of the present invention is to design a cable transport spanning frame for distribution network line installation that does not require the cable to be wound around a transmission line reel and lifted by a crane to a lifting vehicle and then transported by a telescopic frame. Instead, the cable is directly transported on the ground to the lifting vehicle, and then the cable is transported by the telescopic frame, while reducing the risk of tipping due to torque, so as to solve the above-mentioned shortcomings in the technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a cable transport spanning frame for erecting distribution network lines, used for transporting cables, comprising a lifting vehicle and a telescopic frame mounted on the head of the lifting vehicle, an extension frame mounted on the rear of the lifting vehicle, a guide wheel rotatably mounted on the top of the extension frame, a plurality of vertically distributed conveying assemblies on the extension frame for applying an upward friction force to the surface of the cable, the uppermost conveying assembly being fixedly connected to the extension frame, and a suspension assembly for adjusting the spacing being installed between the two conveying assemblies;

[0008] The number of conveying components within a certain height is adjusted by the suspension component to balance the torque when the telescopic frame is extended, and the conveying component is used to directly convey the cable on the ground upward by friction, reducing the gravity pull on the cable on the guide wheel.

[0009] Preferably, the conveying assembly includes a left shell and a right shell, an input shaft and an output shaft rotatably mounted in the left shell and the right shell, rollers fixedly mounted on the input shaft and the output shaft, transmission teeth fixedly mounted on the same end of the input shaft and the output shaft, a driving wheel fixedly mounted on the other end of the input shaft, a driven wheel fixedly mounted on the other end of the output shaft, and a first gear belt meshing with the upper and lower transmission teeth.

[0010] Preferably, a transmission belt is rotatably connected to the upper and lower rollers, and the transmission belt cooperates with the outer wall of the cable.

[0011] Preferably, a circular groove is formed on the transmission belt, and the circular groove contacts the outer peripheral surface of the cable.

[0012] Preferably, positioning plates are fixedly mounted on the left shell and the right shell, through holes are formed in the positioning plates, and threaded fasteners are installed in both through holes.

[0013] Preferably, the suspension assembly includes a first shaft fixedly mounted on the top of the left shell and the right shell, a second shaft fixedly mounted on the bottom of the left shell and the right shell, a first hook detachably connected to the first shaft, a second hook detachably connected to the second shaft, and a threaded connector installed between the first hook and the second hook.

[0014] Preferably, the threaded connector includes a first column rotatably connected to the top of the first hook, a threaded blind hole opened at the top of the first column, and a threaded column fixedly connected to the bottom of the second hook.

[0015] Preferably, the threaded connector installed between the first hook and the second hook in the suspension assembly can be replaced by a fixedly installed steel cable.

[0016] Preferably, a connecting rod is fixedly mounted on the first shaft of the topmost conveying assembly, the top of the connecting rod is fixedly connected to the extension frame, the bottom of the extension frame is fixedly mounted with a power box, the power box has two output ends with the same speed and opposite rotation directions, a transmission wheel is fixedly mounted on the output end, the driving wheel on the left shell and the driving wheel on the right shell are both engaged with a second gear belt, and the two second gear belts are respectively engaged with the two transmission wheels.

[0017] Preferably, a third gear belt is engaged between the driven wheel on one of the conveying assemblies and the driving wheel on the lower conveying assembly.

[0018] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0019] The present invention directly delivers the cable to the top of the vacated lifting vehicle through the conveying assembly and cooperates with the existing telescopic frame for transportation. There is no need to wrap the cable around the transmission line reel and then lift it onto the lifting vehicle with a crane to transport the cable with the telescopic frame. Therefore, there is no need to change the reel, which saves time and improves the efficiency of the cable pay-off operation.

[0020] The present invention provides multiple conveying assemblies, each of which applies an upward friction force to each section of the cable. This eliminates the gravity of the portion of the cable hanging down to the ground as it rolls on the guide wheel. This prevents the situation where the lift truck is too high and the cable hangs down for a long time, and the gravity generated by the hanging portion pulls the cable downward, thus preventing the cable from being damaged.

[0021] At the same time, the present invention can also use the gravity generated by multiple conveying components to form a torque, thereby balancing the torque generated by the extension of the telescopic rod when crossing the conveying cable, reducing the risk of the lifting vehicle tipping over;

[0022] When the height of the lifting vehicle is not very high but the length of the conveying cable spanning is long, the present invention can shorten the distance between the two conveying assemblies by using the suspension assembly, thereby increasing the number of conveying assemblies to improve the torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the suspension of the conveying assembly of the present invention;

[0026] Figure 3 This is a schematic diagram of the disassembly of the conveying assembly and the power box of the present invention;

[0027] Figure 4 This is a schematic diagram of the disassembly of the conveying component and the suspension component of the present invention;

[0028] Figure 5 This is a schematic diagram of the disassembly of the conveying component of the present invention;

[0029] Figure 6 A top view of the conveying assembly of the present invention;

[0030] Figure 7 It is a partial cross-sectional view of the suspension assembly of the present invention.

[0031] Description of reference numerals:

[0032] 1. Cable; 2. Lifting vehicle; 3. Telescopic frame; 4. Extension frame; 5. Guide wheel; 6. Conveying assembly; 6a. Left housing; 6b. Right housing; 6c. Input shaft; 6d. Output shaft; 6e. Roller; 6f. Transmission gear; 6g. Driving wheel; 6h. Driven wheel; 6i. First gear belt; 7. Suspension assembly; 7a. First shaft; 7b. Second shaft; 7c. First hook; 7d. Second hook; 7e. Threaded connector; 7e1. First column; 7e2. Threaded blind hole; 7e3. Threaded column; 8. Transmission belt; 9. Circular groove; 10. Positioning piece; 11. Through hole; 12. Threaded fastener; 13. Connecting rod; 14. Power box; 15. Transmission wheel; 16. Second gear belt; 17. Third gear belt. DETAILED DESCRIPTION

[0033] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0034] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0035] The present invention provides Figure 1-7The cable transport spanning frame for laying power distribution network lines shown in the figure includes a lifting vehicle 2 and a telescopic frame 3 in the prior art. The telescopic frame 3 is installed at the head above the lifting vehicle 2, and an extension frame 4 is fixedly installed at the tail above the lifting vehicle 2. A guide wheel 5 is rotatably installed on the top of the extension frame 4, and a plurality of conveying components 6 are provided at the bottom of the extension frame 4. The conveying component 6 includes a left shell 6a and a right shell 6b, an input shaft 6c and an output shaft 6d rotatably installed in the left shell 6a and the right shell 6b, a roller 6e fixedly installed on the input shaft 6c and the output shaft 6d, a transmission tooth 6f fixedly installed at the same end of the input shaft 6c and the output shaft 6d, a driving wheel 6g fixedly installed at the other end of the input shaft 6c, a driven wheel 6h fixedly installed at the other end of the output shaft 6d, and a first gear belt 6i meshing with the upper and lower transmission teeth 6f, as shown in FIG. Figure 3-Figure 5 As shown, when the driving wheel 6g rotates, it will drive the input shaft 6c to rotate, and the input shaft 6c will drive the roller 6e and the transmission tooth 6f on the input shaft 6c to rotate. The transmission tooth 6f on the input shaft 6c will drive the transmission tooth 6f on the output shaft 6d to rotate through the first gear belt 6i, and the transmission tooth 6f on the output shaft 6d will drive the output shaft 6d to rotate, and the output shaft 6d will drive the roller 6e and the driven wheel 6h on the output shaft 6d to rotate. At this time, if the cable 1 is clamped between the two rollers 6e, then when the roller 6e rotates, it will drive the cable 1 to rise through friction. In order to improve the stability of the cable 1 driven by the roller 6e, we have installed a transmission belt 8 on the upper and lower rollers 6e, and a circular groove 9 is provided on the transmission belt 8. The circular groove 9 is in contact with the outer peripheral surface of the cable 1 to increase the friction force. In this way, the number of conveying components 6 is increased as the height of the lifting vehicle 2 increases. Each conveying component 6 will exert an upward friction force on each section of the cable 1, which makes the gravity of the portion of the cable 1 hanging down to the ground rolling on the guide wheel 5 eliminated by the multiple conveying components 6. The lifting vehicle 2 is too high and the cable 1 hangs down for a long time. The gravity generated by the hanging portion will not pull the cable 1 downward and damage the cable 1. In this way, the cable 1 can be directly conveyed from the ground to the lifting vehicle 2 that is lifted up, so there is no need to use a crane to lift the full reel onto the lifting vehicle 2, which reduces the time for reel replacement and improves the efficiency of the wire-laying operation.

[0036] In order to ensure the installation and suspension of the conveying assembly 6, a suspension assembly 7 is installed between the upper and lower adjacent conveying assemblies 6. The suspension assembly 7 includes a first shaft 7a fixedly installed on the top of the left shell 6a and the right shell 6b, a second shaft 7b fixedly installed on the bottom of the left shell 6a and the right shell 6b, a first hook 7c detachably connected to the first shaft 7a, a second hook 7d detachably connected to the second shaft 7b, and a threaded connector 7e installed between the first hook 7c and the second hook 7d. At the same time, a connecting rod 13 is fixedly installed on the first shaft 7a on the uppermost conveying assembly 6, and the top end of the connecting rod 13 is fixedly connected to the extension frame 4. In this way, the conveying assembly 6 is installed on the lifting vehicle 2 by suspending one at a time.

[0037] In order to ensure that the rollers 6e of all conveying assemblies 6 rotate synchronously, a power box 14 is fixedly installed at the bottom of the extension frame 4. The power box 14 has two output ends with the same speed and opposite rotation directions. A transmission wheel 15 is fixedly installed on the output end. The driving wheel 6g on the left shell 6a and the driving wheel 6g on the right shell 6b are both meshed with a second gear belt 16, and the two second gear belts 16 are respectively meshed with the two transmission wheels 15; the driven wheel 6h on one conveying assembly 6 and the driving wheel 6g on the conveying assembly 6 below are jointly meshed with a third gear belt 17. In this way, after the power box 14 drives the two driving wheels 6g of the uppermost conveying assembly 6 to rotate, the two driven wheels 6h will rotate accordingly, thereby driving the driving wheel 6g on the conveying assembly 6 below to rotate through the third gear belt 17;

[0038] In order to cope with the need for adjustment of different diameters of the cable 1, we have fixedly installed a positioning piece 10 on the left shell 6a and the right shell 6b. A through hole 11 is opened in the positioning piece 10, and a threaded fastener 12 is installed in both through holes 11. By adjusting the threaded fastener 12, the distance between the left shell 6a and the right shell 6b can be adjusted. When the diameter of the cable 1 increases, the distance between the two conveying components 6 can be appropriately shortened, and the number of conveying components 6 can be increased. For this purpose, we set the threaded connector 7e to include a first column 7e1 rotatably connected to the top of the first hook 7c, a threaded blind hole 7e2 opened at the top of the first column 7e1, and a second hook 7d bottom. In the case of a style of threaded column 7e3 fixedly connected to the conveying assembly 6, it is only necessary to simultaneously rotate the first columns 7e1 on both sides of the conveying assembly 6 to adjust the depth of the threaded column 7e3 in the threaded blind hole 7e2, thereby adjusting the distance between the two conveying assemblies 6. Of course, the threaded connector 7e can also be directly replaced with a steel cable of different lengths. In this case, the first hook 7c and the second hook 7d need to be removed and replaced from the first shaft 7a and the second shaft 7b. In addition, when the number of conveying assemblies 6 increases, the torque generated by the conveying assembly 6 as a whole will increase, which can be used to balance the torque generated when the telescopic frame 3 is extended to transport over a long distance, thereby reducing the risk of the lifting vehicle 2 tipping over.

[0039] When using this spanning frame, first, the spacing and number of the two conveying components 6 must be selected based on the required spanning distance and height. The cable 1 passes between the two rollers 6e of the uppermost conveying component 6, passes through the guide wheel 5 and is placed on the telescopic frame 3 for transportation. After the lifting vehicle 2 rises to a certain height, a conveying component 6 is installed outside the cable 1 using threaded fasteners 12, and then the lower conveying component 6 is suspended on the upper conveying component 6 using two suspension components 7. The first column 7e1 is then rotated to adjust the depth of the threaded column 7e3 in the threaded blind hole 7e2, thereby adjusting the spacing between the two conveying components 6. If the length of the spanning conveying cable 1 is long, the spacing is shortened to increase the number of conveying components 6, so that the gravity generated by multiple conveying components 6 forms a torque to balance the torque when the telescopic frame 3 is extended.

[0040] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are illustrative only. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should readily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., the size, scale, structure, shape and proportion of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientation changes, etc.).

Claims

1. A cable transport spanning frame for erecting a distribution network line, used for transporting a cable (1), comprising a lifting vehicle (2) and a telescopic frame (3) mounted on the head of the lifting vehicle (2), characterized in that: An extension frame (4) is installed on the tail of the lifting vehicle (2), a guide wheel (5) is rotatably installed on the top of the extension frame (4), and the extension frame (4) has a plurality of vertically distributed conveying components (6) for applying an upward friction force to the surface of the cable (1), the top conveying component (6) is fixedly connected to the extension frame (4), and a suspension component (7) for adjusting the spacing is installed between the two conveying components (6); The number of conveying assemblies (6) within a certain height is adjusted by the suspension assembly (7) to balance the torque when the telescopic frame (3) is extended, and the conveying assembly (6) is used to directly convey the cable (1) on the ground upward by friction, thereby reducing the gravity pulling on the cable (1) on the guide wheel (5); The conveying assembly (6) comprises a left shell (6a) and a right shell (6b), an input shaft (6c) and an output shaft (6d) rotatably mounted in the left shell (6a) and the right shell (6b), a roller (6e) fixedly mounted on the input shaft (6c) and the output shaft (6d), a transmission tooth (6f) fixedly mounted on the same end of the input shaft (6c) and the output shaft (6d), a driving wheel (6g) fixedly mounted on the other end of the input shaft (6c), a driven wheel (6h) fixedly mounted on the other end of the output shaft (6d), and a first gear belt (6i) meshing with the upper and lower transmission teeth (6f); The suspension assembly (7) comprises a first shaft (7a) fixedly mounted on the top of the left shell (6a) and the right shell (6b), a second shaft (7b) fixedly mounted on the bottom of the left shell (6a) and the right shell (6b), a first hook (7c) detachably connected to the first shaft (7a), a second hook (7d) detachably connected to the second shaft (7b), and a threaded connector (7e) mounted between the first hook (7c) and the second hook (7d); A connecting rod (13) is fixedly mounted on the first shaft (7a) on the top conveying assembly (6), the top end of the connecting rod (13) is fixedly connected to the extension frame (4), the bottom of the extension frame (4) is fixedly mounted with a power box (14), the power box (14) has two output ends with the same rotation speed and opposite rotation directions, and a transmission wheel (15) is fixedly mounted on the output end, and the driving wheel (6g) on ​​the left shell (6a) and the driving wheel (6g) on ​​the right shell (6b) are both meshed with a second gear belt (16), and the two second gear belts (16) are respectively meshed with the two transmission wheels (15).

2. A cable transport spanning frame for laying out a power distribution network line according to claim 1, characterized in that: A transmission belt (8) is rotatably connected to the upper and lower rollers (6e), and the transmission belt (8) is engaged with the outer wall of the cable (1).

3. A cable transport spanning frame for laying out a power distribution network line according to claim 2, characterized in that: A circular groove (9) is formed on the transmission belt (8), and the circular groove (9) contacts the outer peripheral surface of the cable (1).

4. The cable transport spanning frame for laying out a power distribution network line according to claim 1, characterized in that: A positioning piece (10) is fixedly mounted on the left shell (6a) and the right shell (6b), a through hole (11) is provided in the positioning piece (10), and a threaded fastener (12) is installed in both through holes (11).

5. The cable transport spanning frame for laying out a power distribution network line according to claim 1, characterized in that: The threaded connector (7e) comprises a first column (7e1) rotatably connected to the top of the first hook (7c), a threaded blind hole (7e2) opened at the top of the first column (7e1), and a threaded column (7e3) fixedly connected to the bottom of the second hook (7d).

6. The cable transport spanning frame for laying out power distribution network lines according to claim 1, characterized in that: The threaded connection member (7e) installed between the first hook (7c) and the second hook (7d) in the suspension assembly (7) can be replaced by a fixedly installed steel cable.

7. The cable transport spanning frame for laying out a power distribution network line according to claim 1, characterized in that: A driven wheel (6h) on one of the conveying components (6) and a driving wheel (6g) on ​​the lower conveying component (6) are engaged with a third gear belt (17).

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