Large-span alloy cable bridge

Abstract

The invention relates to the technical field of bridges, and discloses a large-span alloy cable bridge which comprises a U-shaped bridge body and a cover plate mounted at the top of the U-shaped bridge body, three mounting partition plates are fixedly mounted at the bottom of the interior of the U-shaped bridge body at equal intervals, detachable mounting blocks are mounted on the two sides of each mounting partition plate at equal intervals, and the mounting partition plates are fixedly mounted on the U-shaped bridge body. Holes for ventilation and heat dissipation are formed in the bottom of the U-shaped bridge body and the middle of the cover plate at equal intervals, a fixed dragging plate is fixedly installed at the bottom of the side, away from the installation partition plate, of the installation block, and a pressing fixing plate capable of being adjusted in a lifting mode is installed on the upper portion of the side, away from the installation partition plate, of the installation block. The pressing and fixing plate is located over the fixed dragging and carrying plate, and a cable body block is installed between the pressing and fixing plate and the fixed dragging and carrying plate. The large-span alloy cable bridge is provided with a left-right separation structure and an up-down suspension separation installation structure, can effectively perform disassembly and assembly operation and is beneficial to heat dissipation of the cable, and the performance of the large-span alloy cable bridge can meet the use requirement.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable trays, and specifically relates to a large-span alloy cable tray. Background Art

[0002] A large-span cable tray is a cable tray system designed specifically to meet the high-strength cable laying requirements of large-scale projects. Its main features include a relatively large span, which can reduce the number of intermediate support points, thereby reducing construction difficulty and cost. It is usually made of materials such as steel, aluminum alloy, or stainless steel, and has good bending resistance and pressure resistance to ensure safety and reliability even under long-span conditions. The large-span cable tray is widely used in large factories, subways, tunnels, exhibition halls, power plants, etc., and is suitable for laying a large number of cables or heavy cable systems. The large-span cable tray provides an efficient and reliable cable support solution for large-scale projects and plays an important role in reducing costs and improving safety factors.

[0003] When the existing cable trays are in use, the cables inside are either crowded together or placed in layers inside the cable trays. Whether the cables are crowded together or placed in layers, it is not conducive to the later maintenance and disassembly of the cables. At the same time, crowded or layered placement of cables is not conducive to the heat dissipation of the cables. Therefore, in view of the above problems, improvements are now needed. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: A large-span alloy cable tray includes a U-shaped cable tray body and a cover plate installed on the top of the U-shaped cable tray body. Three mounting partitions are fixedly installed at equal intervals on the bottom inside the U-shaped cable tray body. Removable mounting blocks are installed at equal intervals on both sides of the mounting partitions. The mounting blocks on both sides of the same mounting partition are arranged vertically offset, and the mounting blocks on the opposite sides of two adjacent mounting partitions are also arranged vertically offset. Through holes for ventilation and heat dissipation are provided at equal intervals at the bottom of the U-shaped cable tray body and in the middle of the cover plate. A fixed towing plate is fixedly installed at the bottom of the mounting block on the side away from the mounting partition. An adjustable pressing and fixing plate is installed on the upper part of the side of the mounting block away from the mounting partition. The pressing and fixing plate is located directly above the fixed towing plate, and a cable body is installed between the pressing and fixing plate and the fixed towing plate. Concave arc grooves matching the cable body are provided on the opposite sides of the pressing and fixing plate and the fixed towing plate. Rubber blocks for clamping the cable body are installed inside the concave arc groove on the pressing and fixing plate.

[0005] Preferably, the mounting block is fixedly installed with a first pin on one side close to the mounting partition, and a right-angled trapezoidal plug-in block is fixedly installed on the end of the first pin away from the mounting block. Square sockets matching the right-angled trapezoidal plug-in blocks are equidistantly provided on both sides of the mounting partition, and the right-angled trapezoidal plug-in blocks are movably inserted into the interior of the square sockets. A first inner groove is provided on the top of the right-angled trapezoidal plug-in blocks, and a T-shaped limit block extending into the interior of the square socket is movably installed inside the first inner groove. The lower part of the T-shaped limit block limits the right-angled trapezoidal plug-in block so that the right-angled trapezoidal plug-in block is stably inserted into the interior of the square socket, and a second return spring is fixedly connected between the top of the T-shaped limit block and the top of the first inner groove.

[0006] Preferably, a retaining ring is fixedly installed in the middle of the first pin, a square plate is movably sleeved on the surface of the first pin between the retaining ring and the right-angled trapezoidal plug block, a resistance plate is movably sleeved on the surface of the first pin between the retaining ring and the mounting block, and a second return spring fixedly connected between the mounting block and the resistance plate is sleeved on the surface of the first pin.

[0007] Preferably, one side of the bottom of the T-shaped limit block is provided with a pressure inclined surface matching the inclined surface of the right-angled trapezoidal plug block, both sides of the top of the square plate are provided with extrusion inclined surfaces for extruding the bottom of the T-shaped limit block, and one side of the right-angled trapezoidal plug block is provided with a groove matching the square plate and the extrusion inclined surface.

[0008] Preferably, an adjustment cavity is provided in the middle of the upper part of the mounting block, and a vertical sliding groove connected to the upper part of the adjustment cavity is provided on one side of the mounting block. An inverted T-shaped slider fixedly connected to the clamping fixing plate is slidingly installed inside the vertical sliding groove, and a first sliding tooth plate is fixedly installed at the end of the inverted T-shaped slider located inside the adjustment cavity.

[0009] Preferably, a gear meshing with a first sliding tooth plate is installed for internal rotation of the adjusting cavity, a second sliding tooth plate meshing with the gear is installed for internal sliding of the adjusting cavity, and a third return spring is fixedly installed between the top of the first sliding tooth plate and the top of the adjusting cavity and between the bottom of the second sliding tooth plate and the bottom of the adjusting cavity.

[0010] Preferably, the top of each mounting block is provided with a socket connected to the adjustment inner cavity, the inside of the socket is movably connected with a plug rod fixedly connected to the top of the second sliding tooth plate, and a pressure plate is fixedly installed on the top of the plug rod.

[0011] Preferably, a first inverted T-shaped inner groove is provided on one side of the pressure plate, an inverted T-shaped block is movably inserted into the interior of the first inverted T-shaped inner groove, a fourth return spring is sleeved on the surface of the inverted T-shaped block located inside the first inverted T-shaped inner groove, a limiting push rod is fixedly installed on the end of the inverted T-shaped block located outside the first inverted T-shaped inner groove, a slot is provided on the top of the mounting block, and the lower part of the limiting push rod is clamped in the interior of the slot.

[0012] Preferably, on one side of the bottom of the cover plate, T-shaped sliding grooves are symmetrically opened. On one side of the U-shaped cable bridge body, two fixing blocks are symmetrically and fixedly installed. The upper parts of the two fixing blocks are respectively located inside the two T-shaped sliding grooves and are fixedly connected with connecting shafts. Rolling wheels slidably installed inside the T-shaped sliding grooves are installed at both ends of the connecting shafts.

[0013] Preferably, a first right-angled trapezoidal limiting block is fixedly installed in the middle of the other side of the U-shaped cable bridge body. A second inverted T-shaped inner groove is opened in the middle of one side of the cover plate. An adjusting pin is movably inserted into the second inverted T-shaped inner groove. One end of the adjusting pin is fixedly installed with a second right-angled trapezoidal limiting block. The second right-angled trapezoidal limiting block is located at the bottom of the first right-angled trapezoidal limiting block. A fifth return spring is sleeved on the surface of the adjusting pin located inside the second inverted T-shaped inner groove. One end of the adjusting pin far from the second right-angled trapezoidal limiting block is fixedly connected with the cover plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) The large-span alloy cable bridge of the present invention has a left-right partition structure and an up-down suspension partition installation structure. The left-right partition structure can effectively facilitate the installation of cables and the later maintenance, disassembly and assembly operations, and is also beneficial to the heat dissipation of cable partitions. The up-down suspension partition installation structure can effectively install cables separately, which is beneficial to the disassembly, assembly and heat dissipation of cables. At the same time, this cable bridge also has a cable fixing structure that is convenient for disassembly and assembly, which effectively facilitates the disassembly and assembly operations of cables. And the structure of this cable bridge is simple in design, convenient to use and operate, stable and reliable in installation, and its performance can meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.

[0017] In the drawings:

[0018] Figure 1 is a schematic cross-sectional structure diagram of the large-span alloy cable bridge of the present invention;

[0019] Figure 2 is of the present invention Figure 1 partial structure schematic diagram;

[0020] Figure 3 is of the present invention Figure 2 partial structure schematic diagram;

[0021] Figure 4 is of the present invention Figure 3 partial structure schematic diagram;

[0022] Figure 5 For the present invention Figure 1 Schematic diagram of the enlarged structure at position A;

[0023] Figure 6 For the present invention Figure 1 Schematic cross-sectional structure diagram of the middle cover plate;

[0024] In the figure: 1. U-shaped bridge frame body; 2. Cover plate; 3. Installation partition; 4. Installation block; 5. Fixed towing plate; 6. Pressing and fixing plate; 7. Cable body; 8. Concave arc groove; 9. First bolt; 10. Right-angled trapezoidal plug; 11. Square jack; 12. First inner groove; 13. T-shaped limit block; 14. Second return spring; 15. Retaining ring; 16. Square plate; 17. Contact plate; 18. Second return spring; 19. Groove; 20. Adjusting cavity; 21. Vertical sliding groove; 22. Inverted T-shaped slider; 23. First sliding tooth plate; 24. Gear; 25. Second sliding tooth plate; 26. Third return spring; 27. Jack; 28. Plug rod; 29. Pressing plate; 30. First inverted T-shaped inner groove; 31. Inverted T-shaped block; 32. Fourth return spring; 33. Limit resisting rod; 34. Card slot; 35. T-shaped sliding groove; 36. Fixed block; 37. Connecting shaft; 38. Roller; 39. First right-angled trapezoidal limit block; 40. Second inverted T-shaped inner groove; 41. Adjusting pin; 42. Second right-angled trapezoidal limit block; 43. Fifth return spring; 44. Pulling ring. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1, given by Figures 1 to 6 The present invention includes a U-shaped bridge frame body 1 and a cover plate 2 installed on the top of the U-shaped bridge frame body 1. Three installation partitions 3 are fixedly installed at equal intervals on the bottom inside the U-shaped bridge frame body 1. Removable installation blocks 4 are installed at equal intervals on both sides of the installation partition 3. The installation blocks 4 on both sides of the same installation partition 3 are arranged in a vertical offset manner, and the installation blocks 4 on the opposite sides of two adjacent installation partitions 3 are also arranged in a vertical offset manner. Holes for ventilation and heat dissipation are provided at equal intervals on the bottom of the U-shaped bridge frame body 1 and in the middle of the cover plate 2.

[0027] A fixed towing plate 5 is fixedly installed at the bottom of the side of the mounting block 4 away from the mounting partition plate 3. An adjustable pressing and fixing plate 6 is installed at the upper part of the side of the mounting block 4 away from the mounting partition plate 3. The pressing and fixing plate 6 is located directly above the fixed towing plate 5, and a cable body 7 is installed between the pressing and fixing plate 6 and the fixed towing plate 5. Concave arc grooves 8 matching the cable body 7 are formed on the opposite sides of the pressing and fixing plate 6 and the fixed towing plate 5. A rubber block for clamping the cable body 7 is installed inside the concave arc groove 8 on the pressing and fixing plate 6. Through the arrangement of the three mounting partition plates 3, the interior of the U-shaped bridge body 1 is divided into four spaces for installing the cable body 7. By arranging the mounting blocks 4 in a staggered manner on both sides of the mounting partition plate 3, an effective installation distance is maintained between the cable bodies 7, enabling effective heat dissipation.

[0028] Embodiment 2: On the basis of Embodiment 1, first pins 9 are fixedly installed on the sides of the mounting block 4 close to the mounting partition plate 3. A right-angled trapezoidal plug 10 is fixedly installed at the end of the first pin 9 away from the mounting block 4. Square jacks 11 matching the right-angled trapezoidal plug 10 are equidistantly formed on both sides of the mounting partition plate 3. The right-angled trapezoidal plug 10 is movably inserted into the interior of the square jack 11. First inner grooves 12 are formed at the tops of the right-angled trapezoidal plugs 10. T-shaped limit blocks 13 extending into the interior of the square jack 11 are movably installed inside the first inner grooves 12. The lower parts of the T-shaped limit blocks 13 limit the right-angled trapezoidal plugs 10, enabling the right-angled trapezoidal plugs 10 to be stably inserted into the interior of the square jacks 11. A second return spring 14 is fixedly connected between the tops of the T-shaped limit blocks 13 and the tops of the first inner grooves 12.

[0029] Retaining rings 15 are fixedly installed in the middle of the first pins 9. Square plates 16 are movably sleeved on the surfaces of the first pins 9 between the retaining rings 15 and the right-angled trapezoidal plugs 10. Contact plates 17 are movably sleeved on the surfaces of the first pins 9 between the retaining rings 15 and the mounting blocks 4. A second return spring 18 fixedly connected between the mounting block 4 and the contact plate 17 is sleeved on the surface of the first pin 9. A pressure-receiving inclined surface matching the inclined surface of the right-angled trapezoidal plug 10 is formed on one side of the bottom of the T-shaped limit block 13. Pressing inclined surfaces for squeezing the bottom of the T-shaped limit block 13 are formed on both sides of the top of the square plate 16. A groove 19 matching the square plate 16 and the pressing inclined surface is formed on one side of the right-angled trapezoidal plug 10, thereby enabling effective installation and disassembly of the right-angled trapezoidal plug 10 and enabling the right-angled trapezoidal plug 10 to be stably installed.

[0030] Specifically, when the mounting block 4 needs to be mounted on the mounting partition 3, the mounting block 4 inserts the right-angled trapezoidal insertion block 10 and the square plate 16 into the square insertion hole 11 through the first pin 9. During the insertion process of the right-angled trapezoidal insertion block 10, its inclined surface squeezes the compressed inclined surface at the bottom of the T-shaped limit stop 13, so that the T-shaped limit stop 13 moves upward and compresses the second return spring 14. When the right-angled trapezoidal insertion block 10 moves from below the T-shaped limit stop 13 into the square insertion hole 11, the elastic restoring force of the second return spring 14 causes the T-shaped limit stop 13 to move downward, and the T-shaped limit stop 13 limits the right-angled trapezoidal insertion block 10 to stably mount the right-angled trapezoidal insertion block 10 inside the square insertion hole 11; at the same time, when the first pin 9 and the right-angled trapezoidal insertion block 10 are inserted into the square insertion hole 11, the contact plate 17 contacts the mounting partition 3, and the elastic force of the second return spring 18 causes the contact plate 17 to effectively contact the mounting partition 3;

[0031] When the mounting block 4 needs to be disassembled, by pushing the mounting block 4, it makes the first pin 9, the right-angled trapezoidal insertion block 10, the square plate 16 and the retaining ring 15 inserted into the square insertion hole 11. The retaining ring 15 pushes the square plate 16 to move, and its extrusion inclined surface squeezes the compressed inclined surface at the bottom of the T-shaped limit stop 13, so that the T-shaped limit stop 13 moves upward and compresses the second return spring 14. When the square plate 16 moves from below the T-shaped limit stop 13 into the square insertion hole 11, the elastic restoring force of the second return spring 14 causes the T-shaped limit stop 13 to block on the side of the square plate 16 away from the right-angled trapezoidal insertion block 10;

[0032] Then quickly pull the mounting block 4, so that the mounting block 4 drives the first pin 9, the right-angled trapezoidal insertion block 10, the square plate 16 and the retaining ring 15 to move out of the square insertion hole 11. During the movement of the square plate 16, it is limited by the T-shaped limit stop 13 and the square plate 16 moves and is stuck into the groove 19. At this time, the square plate 16 is stuck in the groove 19 through the matching of the extrusion inclined surface. Then, as the right-angled trapezoidal insertion block 10 and the square plate 16 move, and the extrusion inclined surface on the side of the square plate 16 away from the right-angled trapezoidal insertion block 10 squeezes the T-shaped limit stop 13 to move upward. Finally, the right-angled trapezoidal insertion block 10 and the square plate 16 quickly move out from below the T-shaped limit stop 13 and out of the square insertion hole 11, thus realizing the disassembly of the mounting block 4.

[0033] Embodiment 3. On the basis of Embodiment 1, adjustment cavities 20 are respectively opened in the middle of the upper parts of the mounting blocks 4. Vertical sliding grooves 21 communicating with the upper parts of the adjustment cavities 20 are respectively opened on one side of the mounting blocks 4. An inverted T-shaped slider 22 fixedly connected to the pressing and fixing plate 6 is slidably installed inside the vertical sliding grooves 21. A first sliding tooth plate 23 is fixedly installed at the end of the inverted T-shaped slider 22 located inside the adjustment cavity 20. A gear 24 meshing with the first sliding tooth plate 23 is rotatably installed inside the adjustment cavity 20. A second sliding tooth plate 25 meshing with the gear 24 is slidably installed inside the adjustment cavity 20. Third return springs 26 are fixedly installed between the top of the first sliding tooth plate 23 and the top of the adjustment cavity 20 and between the bottom of the second sliding tooth plate 25 and the bottom of the adjustment cavity 20 respectively.

[0034] Insertion holes 27 communicating with the adjustment cavities 20 are respectively opened at the tops of the mounting blocks 4. A plug rod 28 fixedly connected to the top of the second sliding tooth plate 25 is movably inserted inside the insertion holes 27. A pressing plate 29 is fixedly installed at the top of the plug rod 28. A first inverted T-shaped inner groove 30 is opened on one side of the pressing plate 29. An inverted T-shaped block 31 is movably inserted inside the first inverted T-shaped inner groove 30. Fourth return springs 32 are sleeved on the surfaces of the inverted T-shaped block 31 located inside the first inverted T-shaped inner groove 30. A limiting abutting rod 33 is fixedly installed at the end of the inverted T-shaped block 31 located outside the first inverted T-shaped inner groove 30. Card slots 34 are respectively opened at the tops of the mounting blocks 4. The lower part of the limiting abutting rod 33 is clamped inside the card slots 34, so that the pressing and fixing plate 6 can be effectively adjusted.

[0035] Specifically, when it is necessary to clamp the cable body 7 between the pressing and fixing plate 6 and the fixed towing plate 5, first pull the limiting abutting rod 33 to move so that its lower part withdraws from the inside of the card slot 34. The movement of the limiting abutting rod 33 will drive the inverted T-shaped block 31 to move and compress the fourth return spring 32. Then, the pressing plate 29 can be pressed down, so that the pressing plate 29 presses down the second sliding tooth plate 25 to move downward through the plug rod 28. The downward movement of the second sliding tooth plate 25 will drive the gear 24 to rotate and drive the first sliding tooth plate 23 to move upward. The movements of the second sliding tooth plate 25 and the first sliding tooth plate 23 will compress the third return spring 26;

[0036] The upward movement of the first sliding tooth plate 23 will drive the inverted T-shaped slider 22 and the pressing and fixing plate 6 to move upward. Then, the cable body 7 is placed inside the concave arc groove 8 and the pressing plate 29 is released. At this time, the elastic restoring forces of the two third return springs 26 will cause the second sliding tooth plate 25 and the first sliding tooth plate 23 to move back and reset. The backward reset of the first sliding tooth plate 23 will drive the inverted T-shaped slider 22 and the pressing and fixing plate 6 to move downward, so that the pressing and fixing plate 6 clamps the cable body 7;

[0037] The return and reset of the second sliding tooth plate 25 will drive the insertion rod 28 and the pressing plate 29 to move upward. When the lower part of the limit abutting rod 33 is aligned with the card slot 34, the elastic restoring force of the fourth reset spring 32 will cause the limit abutting rod 33 to move horizontally so that its lower part is inserted into the inside of the card slot 34, thereby maintaining the firmness of the pressing and fixing plate 6 clamping the cable body 7.

[0038] Embodiment 4, on the basis of Embodiment 1, T-shaped sliding grooves 35 are symmetrically opened on one side of the bottom of the cover plate 2. Two fixing blocks 36 are symmetrically and fixedly installed on one side of the U-shaped bridge body 1. The upper parts of the two fixing blocks 36 are respectively located inside the two T-shaped sliding grooves 35 and are fixedly connected with connecting shafts 37. Rolling wheels 38 slidably installed inside the T-shaped sliding grooves 35 are installed at both ends of the connecting shaft 37, so that the cover plate 2 can be effectively opened.

[0039] Specifically, by rotating the cover plate 2, the cover plate 2 rotates 90 degrees to a vertical state by rotating the rolling wheels 38 inside the T-shaped sliding grooves 35; then the cover plate 2 is moved downward, and the cover plate 2 rolls inside the T-shaped sliding grooves 35 by the rolling wheels 38 to move the cover plate 2 downward, and finally the cover plate 2 is attached to one side of the U-shaped bridge body 1 in a 90-degree vertical state.

[0040] A first right-angled trapezoidal limit block 39 is fixedly installed in the middle of the other side of the U-shaped bridge body 1. A second inverted T-shaped inner groove 40 is opened in the middle of one side of the cover plate 2. An adjusting pin 41 is movably inserted inside the second inverted T-shaped inner groove 40. One end of the adjusting pin 41 is fixedly installed with a second right-angled trapezoidal limit block 42. The second right-angled trapezoidal limit block 42 is located at the bottom of the first right-angled trapezoidal limit block 39. A fifth reset spring 43 is sleeved on the surface of the adjusting pin 41 located inside the second inverted T-shaped inner groove 40. One end of the adjusting pin 41 far from the second right-angled trapezoidal limit block 42 is fixedly connected with a cover plate 44, so that the cover plate 2 can be stably installed on the top of the U-shaped bridge body 1.

[0041] When the cover plate 2 needs to be rotated and opened, first pull the adjusting pin 41 and the second right-angled trapezoidal limit block 42 to move by pulling the pull ring 44, so that the second right-angled trapezoidal limit block 42 moves from the bottom of the first right-angled trapezoidal limit block 39 to the inside of the second inverted T-shaped inner groove 40 and compresses the fifth reset spring 43; when the second right-angled trapezoidal limit block 42 moves to the inside of the second inverted T-shaped inner groove 40, the cover plate 2 can be rotated and adjusted.

[0042] This large-span alloy cable tray has a left-right separation structure and an up-down suspension separation installation structure. The left-right separation structure can effectively facilitate the installation of cables and the later maintenance, disassembly and assembly operations, and is also beneficial to the heat dissipation of cable separation. The up-down suspension separation installation structure can effectively install the cables separately, which is beneficial to the disassembly, assembly and heat dissipation of the cables. At the same time, this cable tray is also equipped with a cable fixing structure that is convenient for disassembly and assembly, thus effectively facilitating the disassembly and assembly operations of the cables.

[0043] Moreover, the structure of this large-span alloy cable tray is simply designed, convenient to use and operate, and stable and reliable in installation. Its performance can meet the usage requirements.

[0044] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-span alloy cable tray, comprising a U-shaped tray body (1) and a cover plate (2) installed on the top of the U-shaped tray body (1), characterized in that: Three mounting partitions (3) are fixedly installed at equal intervals at the bottom inside the U-shaped bridge body (1). Removable mounting blocks (4) are installed at equal intervals on both sides of the mounting partition (3). The mounting blocks (4) on both sides of the same mounting partition (3) are arranged in a vertical offset manner, and the mounting blocks (4) on the opposite sides of two adjacent mounting partitions (3) are also arranged in a vertical offset manner. Holes for ventilation and heat dissipation are provided at equal intervals at the bottom of the U-shaped bridge body (1) and in the middle of the cover plate (2). A fixed towing plate (5) is fixedly installed at the bottom of the side of the mounting block (4) away from the mounting partition (3). A compressible fixing plate (6) that can be adjusted in height is installed on the upper part of the side of the mounting block (4) away from the mounting partition (3). The compressible fixing plate (6) is located directly above the fixed towing plate (5), and a cable body (7) is installed between the compressible fixing plate (6) and the fixed towing plate (5). Concave arc grooves (8) matching the cable body (7) are provided on the opposite sides of the compressible fixing plate (6) and the fixed towing plate (5). A rubber block for clamping the cable body (7) is installed inside the concave arc groove (8) on the compressible fixing plate (6).

2. The large-span alloy cable tray according to claim 1, characterized in that: A first pin (9) is fixedly installed on each side of the mounting block (4) close to the mounting partition (3). A right-angled trapezoidal plug (10) is fixedly installed at the end of the first pin (9) away from the mounting block (4). Square jacks (11) matching the right-angled trapezoidal plugs (10) are provided at equal intervals on both sides of the mounting partition (3). The right-angled trapezoidal plugs (10) are movably inserted into the square jacks (11). First inner grooves (12) are provided at the tops of the right-angled trapezoidal plugs (10). T-shaped limit blocks (13) extending into the square jacks (11) are movably installed inside the first inner grooves (12). The lower parts of the T-shaped limit blocks (13) limit the right-angled trapezoidal plugs (10) so that the right-angled trapezoidal plugs (10) are stably inserted into the square jacks (11). A second return spring (14) is fixedly connected between the top of the T-shaped limit block (13) and the top of the first inner groove (12).

3. A large-span alloy cable tray according to claim 2, characterized in that: A retaining ring (15) is fixedly installed in the middle of each first pin (9). A square plate (16) is movably sleeved on the surface of the first pin (9) between the retaining ring (15) and the right-angled trapezoidal plug (10). A contact plate (17) is movably sleeved on the surface of the first pin (9) between the retaining ring (15) and the mounting block (4). A second return spring (18) fixedly connected between the mounting block (4) and the contact plate (17) is sleeved on the surface of the first pin (9).

4. The large-span alloy cable tray according to claim 3, characterized in that: A pressure-receiving inclined surface matching the inclined surface of the right-angled trapezoidal plug (10) is provided on one side of the bottom of the T-shaped limit block (13). Extrusion inclined surfaces for extruding the bottom of the T-shaped limit block (13) are provided on both sides of the top of the square plate (16). A groove (19) matching the square plate (16) and the extrusion inclined surface is provided on one side of the right-angled trapezoidal plug (10).

5. A large-span alloy cable tray according to claim 1, characterized in that: In the middle of the upper part of the installation block (4), an adjustment inner cavity (20) is provided. On one side of the installation block (4), a vertical sliding groove (21) communicating with the upper part of the adjustment inner cavity (20) is provided. Inside the vertical sliding groove (21), an inverted T-shaped slider (22) fixedly connected to the pressing fixed plate (6) is slidably installed. At the end of the inverted T-shaped slider (22) located inside the adjustment inner cavity (20), a first sliding tooth plate (23) is fixedly installed.

6. The large-span alloy cable tray according to claim 5, wherein: Inside the adjustment inner cavity (20), a gear (24) meshingly connected with the first sliding tooth plate (23) is rotatably installed. Inside the adjustment inner cavity (20), a second sliding tooth plate (25) meshingly connected with the gear (24) is slidably installed. A third return spring (26) is fixedly installed between the top of the first sliding tooth plate (23) and the top of the adjustment inner cavity (20) and between the bottom of the second sliding tooth plate (25) and the bottom of the adjustment inner cavity (20).

7. The large-span alloy cable tray according to claim 6, characterized in that: On the top of the installation block (4), a jack (27) communicating with the adjustment inner cavity (20) is provided. Inside the jack (27), a plug rod (28) fixedly connected to the top of the second sliding tooth plate (25) is movably inserted. On the top of the plug rod (28), a pressing plate (29) is fixedly installed.

8. The long-span alloy cable tray according to claim 7, characterized in that: On one side of the pressing plate (29), a first inverted T-shaped inner groove (30) is provided. Inside the first inverted T-shaped inner groove (30), an inverted T-shaped block (31) is movably inserted. On the surface of the inverted T-shaped block (31) located inside the first inverted T-shaped inner groove (30), a fourth return spring (32) is sleeved. At the end of the inverted T-shaped block (31) located outside the first inverted T-shaped inner groove (30), a limiting abutting rod (33) is fixedly installed. On the top of the installation block (4), a clamping groove (34) is provided. The lower part of the limiting abutting rod (33) is clamped inside the clamping groove (34).

9. The large-span alloy cable tray according to claim 1, wherein: On one side of the bottom of the cover plate (2), T-shaped sliding grooves (35) are symmetrically provided. On one side of the U-shaped bridge body (1), two fixed blocks (36) are symmetrically and fixedly installed. The upper parts of the two fixed blocks (36) are respectively located inside the two T-shaped sliding grooves (35) and fixedly connected with a connecting shaft (37). At both ends of the connecting shaft (37), rollers (38) slidably installed inside the T-shaped sliding grooves (35) are installed.

10. The large-span alloy cable tray according to claim 9, characterized in that: In the middle of the other side of the U-shaped bridge body (1), a first right-angled trapezoidal limiting block (39) is fixedly installed. In the middle of one side of the cover plate (2), a second inverted T-shaped inner groove (40) is provided. Inside the second inverted T-shaped inner groove (40), an adjusting pin (41) is movably inserted. At one end of the adjusting pin (41), a second right-angled trapezoidal limiting block (42) is fixedly installed. The second right-angled trapezoidal limiting block (42) is located at the bottom of the first right-angled trapezoidal limiting block (39). On the surface of the adjusting pin (41) located inside the second inverted T-shaped inner groove (40), a fifth return spring (43) is sleeved. The end of the adjusting pin (41) far from the second right-angled trapezoidal limiting block (42) is fixedly connected with a cover plate (44).

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