A waterproof structure for cable trench

Abstract

The present invention relates to the field of cable trench technology, and in particular to a cable trench waterproof structure, comprising a trench body and a cover plate located on the trench body, a plurality of main load-bearing supports are arranged side by side along the length direction on the inner wall of the trench body, and a plurality of secondary load-bearing supports are arranged between two adjacent main load-bearing supports; a first rotating support is arranged on the front side of the main load-bearing support, a main support plate is arranged on the upper side of the main load-bearing support, a rotating structure is arranged at the front end of the main support plate, the first rotating support is connected to the rotating structure, and the rotating structure is driven to rotate by a driving mechanism; a second rotating support is arranged on the front side of the secondary load-bearing support, a secondary support plate is arranged on the upper side of the second rotating support, a limiting cylinder is arranged at the front end of the secondary support plate, and a limiting groove cooperating with the limiting cylinder is arranged on the second rotating support, which can prevent the cables below from being flooded, causing corrosion and damage, and does not need to increase the depth of the trench, thereby reducing the support cost; the two rotating supports can be rotated to both sides to leave space in the middle of the trench.

Description

Technical Field

[0001] The invention relates to the technical field of cable trenches, and in particular to a cable trench waterproof structure. Background Art

[0002] The cable trench is a special underground passage for laying cables to place and protect cable facilities. First, a trench is excavated and built, and load-bearing supports are installed on the side walls of the trench. The cables are laid in the trench along the supports and covered with a cover plate to form a complete cable trench system.

[0003] In the prior art, brackets are usually arranged on both sides of the cable trench, leaving a space in the middle, which is generally about two people wide, for workers to enter to lay and repair cables and other operations; after water accumulates in the cable trench during the rainy season or other circumstances, if the drainage speed in the cable trench is slower than the water accumulation speed, although the cables are suspended on the brackets on both sides of the trench, in the trench where more cables are arranged, in order to reasonably use the space, the brackets on both sides of the trench side walls need to be arranged in multiple layers up and down, and the cables on the brackets closer to the bottom are easily overflowed by the accumulated water, causing corrosion and damage; in heavy rain weather or rainy seasons in the south, the water level in the cable trench is higher, and generally the cables on the bottom two or three layers of brackets will be immersed in water for a long time, and the problem is more serious. If the excavation and masonry of the trench are deepened in the trench where more cables are arranged, the difficulty of supporting in the tunnel will increase, and the cost will increase again.

[0004] Chinese invention patent CN212462742U discloses a splicable underground cable trench based on urban integrated wiring, including a segmented cable trench, a tension member and a cover plate, both sides of the upper end of the outer side of the segmented cable trench are provided with concrete floor members, the upper end of the side water collection tank is provided with a water diversion hole, the tension frame is fixedly installed in the middle position of the inner lower surface of the segmented cable trench, the cover plate is movably installed at the upper end of the segmented cable trench, the lower end of the intermediate rotating shaft is movably connected with a threaded rod, and the outer sides of the threaded rod are symmetrically welded with side round rods, and the outer sides of the segmented cable trench are respectively installed with a main mounting block and a secondary mounting block. Chinese invention patent CN118198972A discloses a cable trench support, including a foundation, the upper end of the foundation is symmetrically provided with cable trenches on the left and right sides, a baffle is installed between the upper ends of the cable trenches on the left and right sides, a plurality of cable supports are evenly arranged at intervals along the upper and lower directions at one end of the cable trench close to each other, and a rainproof mechanism is provided between the cable support and the cable trench. None of them solves the serious problem that the cables on the bottom two or three layers of supports will be immersed in water for a long time. The excavation and masonry of deepening the trench will increase the difficulty of supporting in the tunnel and increase the cost. Summary of the invention

[0005] The present invention is to overcome the shortcomings of the above-mentioned prior art and provide a cable trench waterproof structure. The present invention installs the main load-bearing bracket and the secondary load-bearing bracket on the side wall of the cable trench, and the first rotating bracket and the second rotating bracket are respectively rotated and arranged in front of the main load-bearing bracket and the secondary load-bearing bracket, corresponding to them horizontally, so that the main load-bearing bracket and the secondary load-bearing bracket are raised in the vertical minimum height, and the cables originally located below are transferred to the first rotating bracket and the second rotating bracket, so as to avoid the cables below from being flooded, causing corrosion and damage, and there is no need to increase the depth of the trench, thereby reducing the support cost.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a cable trench waterproof structure, including a trench body and a cover plate located on the trench body, a plurality of main load-bearing supports are arranged side by side along the length direction on the inner wall of the trench body, and a plurality of secondary load-bearing supports are arranged between two adjacent main load-bearing supports; a first rotating support is arranged on the front side of the main load-bearing support, a main support plate is arranged on the upper side of the main load-bearing support, a rotating structure is arranged at the front end of the main support plate, the first rotating support is connected to the rotating structure, and the rotating structure is driven to rotate by a driving mechanism; a second rotating support is arranged on the front side of the secondary load-bearing support, a secondary support plate is arranged on the upper side of the second rotating support, a limiting cylinder is arranged at the front end of the secondary support plate, and a limiting groove matching the limiting cylinder is arranged on the second rotating support.

[0007] Preferably, the first rotating bracket includes a first vertical plate and a plurality of first horizontal plates, and the plurality of first horizontal plates are vertically arranged side by side on the first vertical plate.

[0008] Preferably, a cover plate is provided on the main support plate, and the rotating structure includes a mounting frame installed in the cover plate, and a sprocket, an arc plate and a chain are provided on the mounting frame. The arc plate extends to the front end of the main support plate, one side of the chain is wound around the arc plate, and the other side is wound around the sprocket, and a circle of convex teeth is provided on the outer side of the chain; the chain is driven to rotate by a driving mechanism; the first vertical plate is provided with a row of grooves along the length direction, and the convex teeth are wedged into the grooves.

[0009] Preferably, the rotating structure further includes two straight plates located on the upper and lower sides of the arc plate, the straight plate located on the upper side of the arc plate is arranged horizontally, and the straight plate located on the lower side of the arc plate is arranged vertically, and the chain bypasses the straight plates.

[0010] Preferably, the arc plate and the straight plate are located at the opening on the front side of the cover plate; the straight plate located on the upper side of the arc plate is flush with the upper surface of the cover plate.

[0011] Preferably, the first vertical plate is vertically provided with connecting plates along both sides in the vertical direction, the upper part of the connecting plate is provided with a sliding bar, and the front end of the outer side surface of the cover plate is provided with a sliding seat that cooperates with the sliding bar.

[0012] Preferably, a guide arc bar is provided at the front end of the outer side surface of the cover plate, and the guide arc bar is concentrically arranged with the arc plate; a horizontal guide straight bar is provided on the outer side surface of the cover plate, and the guide straight bar is aligned and connected with the upper end of the guide arc bar, and the lower end of the guide arc bar is aligned with the upper side of the sliding seat; two guide rollers are provided in the middle part of the connecting plate, and the two guide rollers engage the guide arc bar and the guide straight bar, and the guide rollers are aligned with the lower side of the sliding bar.

[0013] Preferably, the driving mechanism includes a worm wheel, a worm and a connecting shaft, the worm wheel is fixedly connected to the sprocket, the worm and the worm cooperate with the worm wheel, one end of the connecting shaft is connected to the worm, and the other end is provided with a driven bevel gear, the driven bevel gear is meshed with the driving bevel gear, and the driven bevel gear is connected to a knob.

[0014] Preferably, the knob is hexagonal and is screwed through a sleeve.

[0015] Preferably, the second rotating bracket includes a second vertical plate and a plurality of second horizontal plates, and the plurality of second horizontal plates are vertically arranged side by side on the second vertical plate; and a top cover is provided at the upper end of the limiting groove.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] (1) The main load-bearing support and the secondary load-bearing support are installed on the side wall of the cable trench. The first rotating support and the second rotating support are respectively rotated and arranged in front of the main load-bearing support and the secondary load-bearing support, corresponding to them horizontally, so that the vertical minimum height of the main load-bearing support and the secondary load-bearing support is increased, and the cables originally located below are transferred to the first rotating support and the second rotating support, and occupy the space in the middle of the trench for workers to enter and repair the cables. This can prevent the cables below from being flooded, causing corrosion and damage, and there is no need to increase the depth of the trench, thereby reducing the cost of support.

[0018] (2) The cable is laid along the main load-bearing support and the secondary load-bearing support, and is also laid along the first rotating support and the second rotating support. The rotating structure is driven by the driving mechanism to rotate, driving the first rotating support to rotate upward around the front end of the main support plate and come to the top of the main support plate. At the same time, since the first rotating support and the second rotating support are connected by a cable, and a steel wire with reinforced strength is provided in the cable, the second rotating support also rotates upward around the front end of the secondary support plate under the drive of the cable; the first rotating support and the second rotating support are respectively rotated to the top of the main load-bearing support and the secondary load-bearing support, leaving space in the middle of the groove to facilitate workers to enter to lay and repair cables, etc., thereby ensuring the normal operation of the cables.

[0019] (3) The cable has a certain degree of flexibility, which allows the first rotating bracket rotated above the main support plate and the multiple second rotating brackets on both sides to rotate to different heights respectively, thereby reducing the twisting effect of the cable and protecting the cable. The setting of the limiting cylinder and the limiting groove allows the second rotating bracket to rotate while moving on the secondary load-bearing bracket, which has strong adaptability and better protection for the cable; and when the two adjacent first rotating brackets are rotated to the top of the main support plate at the same time, the second rotating brackets between the two can be driven to rotate to the secondary support plate, which is more convenient for maintenance operations.

[0020] (4) The chain is driven to rotate on the arc plate by rotating the sprocket, and the convex teeth are embedded in the groove of the first vertical plate, driving the first vertical plate to move along the chain on the arc plate and rotate to the upper side of the main support plate. Reversing the sprocket can make the first vertical plate return to the vertical state, thereby achieving the effect of controlling the up and down movement and rotation of the first rotating bracket, and realizing the laying and maintenance of the cable.

[0021] (5) The straight plate on the lower side of the arc plate is embedded in the groove of the first vertical plate through the convex teeth on the chain. The first rotating bracket can move upward along the straight plate for a distance and then rotate along the chain on the arc plate, so that the center of gravity of the first rotating bracket is closer to the rotation point, reducing obstacles and improving stability. At the same time, after the first rotating bracket rotates upward, the straight plate located on the upper side of the arc plate is embedded in the groove of the first vertical plate through the convex teeth on the chain, and continues to drive the first rotating bracket to move closer to the side of the groove, leaving the middle space for other operations.

[0022] (6) The straight plate located on the upper side of the arc plate is flush with the upper surface of the cover plate, so that the first vertical plate can be easily moved on the cover plate.

[0023] (7) When the first rotating bracket moves upward along the straight plate located at the lower side of the arc plate, the sliding bar on the connecting plate moves along the sliding seat on the cover plate, playing the role of limiting and guiding, and the cover plate is fixed to the main support plate; when the first rotating bracket rises to the middle position aligned with the arc plate, the center of gravity of the first rotating bracket approaches the center of the arc plate, the sliding bar is separated from the sliding seat, and the guide roller is clamped on the guide arc bar. Driven by the convex teeth on the chain, the first rotating bracket rotates around the arc plate, and after the guide roller is clamped on the guide straight bar, it moves along the straight plate located on the upper side of the arc plate to the edge of the groove, and cooperates with the chain to achieve the effect of the first rotating bracket moving and rotating on the main support plate.

[0024] (8) The worker can turn the knob through the sleeve to drive the connecting shaft to rotate through the meshing of the active bevel gear and the driven bevel gear, so that the worm drives the worm wheel to drive the sprocket to rotate, thereby achieving the effect of the chain driving the first rotating bracket to move and rotate.

[0025] (9) When the second rotating bracket falls, the second vertical plate moves downward, the limiting groove and the limiting cylinder slide relative to each other, and the top cover can block the limiting cylinder after the limiting cylinder slides to the upper end of the limiting groove, thereby preventing the second rotating bracket from continuing to fall and causing damage to the cable, thereby reducing the cable bearing force and distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view schematic diagram of the present invention;

[0027] Figure 2 for Figure 1 Enlarged view of point C in the middle;

[0028] Figure 3 for Figure 1 Schematic diagram of the cross-section at AA in the middle;

[0029] Figure 4 for Figure 3 A partial enlarged view of the main load-bearing support and the first rotating support;

[0030] Figure 5 for Figure 4 The enlarged cross-sectional view at D in the middle;

[0031] Figure 6 for Figure 5 Enlarged view of point E in the middle;

[0032] Figure 7 for Figure 1 Schematic diagram of the cross section at the middle BB;

[0033] Figure 8 for Figure 7 A partial enlarged view of the secondary load-bearing support and the second rotating support.

[0034] Description of reference numerals:

[0035] 1-groove body, 11-cover plate;

[0036] 2-main load-bearing bracket, 21-main support plate, 22-cover plate, 23-sliding seat, 24-guide arc bar, 25-guide straight bar;

[0037] 3-secondary load-bearing bracket, 31-secondary support plate, 32-limiting cylinder;

[0038] 4-first rotating bracket, 41-first vertical plate, 42-first horizontal plate, 43-connecting plate, 44-groove, 45-sliding bar, 46-guide roller;

[0039] 5-second rotating bracket, 51-second vertical plate, 52-second horizontal plate, 53-limiting groove, 54-top cover;

[0040] 6-rotating structure, 61-mounting frame, 62-sprocket, 63-arc plate, 64-straight plate, 65-chain, 66-convex teeth;

[0041] 7-driving mechanism, 71-worm gear, 72-worm, 73-connecting shaft, 74-driven bevel gear, 75-driving bevel gear, 76-knob. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0043] Example

[0044] The following is combined with Figure 1-Figure 6 The present invention is further described as follows: a cable trench waterproof structure, such as Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown,

[0045] It includes a groove body 1 and a cover plate 11 located on the groove body 1. A plurality of main load-bearing supports 2 are arranged side by side along the length direction on the inner wall of the groove body 1, and a plurality of secondary load-bearing supports 3 are arranged between two adjacent main load-bearing supports 2; a first rotating support 4 is arranged on the front side of the main load-bearing support 2, a main support plate 21 is arranged on the upper side of the main load-bearing support 2, a rotating structure 6 is arranged at the front end of the main support plate 21, the first rotating support 4 is connected to the rotating structure 6, and the rotating structure 6 is driven to rotate by a driving mechanism 7; a second rotating support 5 is arranged on the front side of the secondary load-bearing support 3, a secondary support plate 31 is arranged on the upper side of the second rotating support 5, a limiting cylinder 32 is arranged at the front end of the secondary support plate 31, and a limiting groove 53 cooperating with the limiting cylinder 32 is arranged on the second rotating support 5.

[0046] The main load-bearing support 2 and the secondary load-bearing support 3 are installed on the side wall of the cable trench, and the first rotating support 4 and the second rotating support 5 are respectively rotatably arranged in front of the main load-bearing support 2 and the secondary load-bearing support 3, corresponding thereto horizontally, so that the main load-bearing support 2 and the secondary load-bearing support 3 are raised in the vertical minimum height, and the cables originally located below are transferred to the first rotating support 4 and the second rotating support 5, and occupy the space reserved in the middle of the trench for workers to enter and repair cables, etc.; it can prevent the cables below from being flooded, causing corrosion and damage, and there is no need to increase the depth of the trench, thereby reducing the cost of support.

[0047] The cable is laid along the main load-bearing support 2 and the secondary load-bearing support 3, and is also laid along the first rotating support 4 and the second rotating support 5. The rotating structure 6 is driven to rotate by the driving mechanism 7, driving the first rotating support 4 to rotate upward around the front end of the main support plate 21 and come to the top of the main support plate 21. At the same time, since the first rotating support 4 and the second rotating support 5 are connected by a cable, a steel wire with reinforced strength is provided in the cable. Driven by the cable, the second rotating support 5 also rotates upward around the front end of the secondary support plate 31; the first rotating support 4 and the second rotating support 5 are respectively rotated to the top of the main load-bearing support 2 and the secondary load-bearing support 3, leaving space in the middle of the groove to facilitate workers to enter to lay and repair cables, etc., thereby ensuring normal operation of the cables.

[0048] The cable has a certain flexibility, which allows the first rotating bracket 4 rotated above the main support plate 21 and the multiple second rotating brackets 5 on both sides to rotate to different heights respectively, thereby reducing the twisting effect of the cable and protecting the cable. The setting of the limiting cylinder 32 and the limiting groove 53 allows the second rotating bracket 5 to rotate while moving on the secondary load-bearing bracket 3, which has strong adaptability and better protection for the cable; and when the two adjacent first rotating brackets 4 are rotated to above the main support plate 21 at the same time, the second rotating bracket 5 between the two can be driven to rotate to the secondary support plate 31, which is more convenient for maintenance operations.

[0049] like Figure 3 As shown, the first rotating bracket 4 includes a first vertical plate 41 and a plurality of first horizontal plates 42 , and the plurality of first horizontal plates 42 are vertically arranged side by side on the first vertical plate 41 .

[0050] like Figure 4 , Figure 5 and Figure 6 As shown, a cover plate 22 is provided on the main support plate 21, and the rotating structure 6 includes a mounting frame 61 installed in the cover plate 22, and a sprocket 62, an arc plate 63 and a chain 65 are provided on the mounting frame 61. The arc plate 63 extends to the front end of the main support plate 21, and one side of the chain 65 is wound around the arc plate 63, and the other side is wound around the sprocket 62. A circle of convex teeth 66 is provided on the outer side of the chain 65; the chain 65 is driven to rotate by the driving mechanism 7; the first vertical plate 41 is provided with a row of grooves 44 along the length direction, and the convex teeth 66 are wedged into the grooves 44.

[0051] By rotating the sprocket 62, the chain 65 is driven to rotate on the arc plate 63, and the convex teeth 66 are embedded in the groove 44 of the first vertical plate 41, driving the first vertical plate 41 to move along the chain 65 on the arc plate 63 and rotate to the upper side of the main support plate 21. Reversing the sprocket 62 can return the first vertical plate 41 to a vertical state, thereby achieving the effect of controlling the up and down movement and rotation of the first rotating bracket 4, and realizing the laying and maintenance of cables.

[0052] like Figure 5As shown, the rotating structure 6 also includes two straight plates 64 located on the upper and lower sides of the arc plate 63 , the straight plate 64 located on the upper side of the arc plate 63 is arranged horizontally, and the straight plate 64 located on the lower side of the arc plate 63 is arranged vertically, and the chain 65 passes around the straight plates 64 .

[0053] The straight plate 64 on the lower side of the arc plate 63 is embedded in the groove 44 of the first vertical plate 41 through the convex teeth 66 on the chain 65. The first rotating bracket 4 can move upward along the straight plate 64 for a distance, and then rotate along the chain 65 on the arc plate 63, so that the center of gravity of the first rotating bracket 4 is closer to the rotation point, reducing obstacles and improving stability. At the same time, after the first rotating bracket 4 is rotated up, the straight plate 64 on the upper side of the arc plate 63 is embedded in the groove 44 of the first vertical plate 41 through the convex teeth 66 on the chain 65, and continues to drive the first rotating bracket 4 to move toward the side of the groove, leaving the middle space for other operations.

[0054] like Figure 5 As shown, the arc plate 63 and the straight plate 64 are located at the opening on the front side of the cover plate 22; the straight plate 64 located on the upper side of the arc plate 63 is flush with the upper surface of the cover plate 22, so that the first vertical plate 41 can be easily moved on the cover plate 22.

[0055] like Figure 4 As shown, the first vertical plate 41 is vertically provided with connecting plates 43 along both sides thereof, the upper part of the connecting plate 43 is provided with a sliding bar 45 , and the front end of the outer side surface of the cover plate 22 is provided with a sliding seat 23 matched with the sliding bar 45 .

[0056] like Figure 4 As shown, a guide arc bar 24 is provided at the front end of the outer side surface of the cover plate 22, and the guide arc bar 24 is concentrically arranged with the arc plate 63; a horizontal guide straight bar 25 is provided on the outer side surface of the cover plate 22, and the guide straight bar 25 is aligned and connected with the upper end of the guide arc bar 24, and the lower end of the guide arc bar 24 is aligned with the upper side of the sliding seat 23; two guide rollers 46 are provided in the middle part of the connecting plate 43, and the two guide rollers 46 engage the guide arc bar 24 and the guide straight bar 25, and the guide rollers 46 are aligned with the lower side of the sliding bar 45.

[0057] When the first rotating bracket 4 moves upward along the straight plate 64 located on the lower side of the arc plate 63, the sliding bar 45 on the connecting plate 43 moves along the sliding seat 23 on the cover plate 22, playing a role of limiting and guiding, and the cover plate 22 is fixed to the main support plate 21; when the first rotating bracket 4 rises to the position where the middle is aligned with the arc plate 63, the center of gravity of the first rotating bracket 4 is close to the center of the arc plate 63, the sliding bar 45 is disengaged from the sliding seat 23, and the guide roller 46 is clamped on the guide arc bar 24. Driven by the convex teeth 66 on the chain 65, the first rotating bracket 4 rotates around the arc plate 63, and after the guide roller 46 is clamped into the guide straight bar 25, it moves toward the edge of the groove along the straight plate 64 located on the upper side of the arc plate 63, and cooperates with the chain 65 to achieve the effect of moving and rotating the first rotating bracket 4 on the main support plate 21.

[0058] like Figure 5 As shown, the driving mechanism 7 includes a worm wheel 71, a worm 72 and a connecting shaft 73. The worm wheel 71 is fixedly connected to the sprocket 62, the worm 72 cooperates with the worm wheel 71, one end of the connecting shaft 73 is connected to the worm 72, and the other end is provided with a driven bevel gear 74, the driven bevel gear 74 is meshed with a driving bevel gear 75, and the driven bevel gear 74 is connected to a knob 76. The knob 76 is hexagonal and is turned by a sleeve.

[0059] A worker can turn the knob 76 through the sleeve to drive the connecting shaft 73 to rotate through the meshing of the active bevel gear 75 and the driven bevel gear 74, so that the worm 72 drives the worm wheel 71 to drive the sprocket 62 to rotate, thereby achieving the effect of the chain 65 driving the first rotating bracket 4 to move and rotate.

[0060] like Figure 7 and Figure 8 As shown, the second rotating bracket 5 includes a second vertical plate 51 and a plurality of second horizontal plates 52, and the plurality of second horizontal plates 52 are vertically arranged side by side on the second vertical plate 51; a top cover 54 is provided at the upper end of the limiting groove 53. When the second rotating bracket 5 falls, the second vertical plate 51 moves downward, and the limiting groove 53 and the limiting cylinder 32 slide relative to each other. The top cover 54 can block the limiting cylinder 32 after the limiting cylinder 32 slides to the upper end of the limiting groove 53, thereby preventing the second rotating bracket 5 from continuing to fall and causing damage to the cable, thereby reducing the load-bearing and distortion degree of the cable.

[0061] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A cable trench waterproof structure, comprising a trench body (1) and a cover plate (11) located on the trench body (1), characterized in that: A plurality of main load-bearing supports (2) are arranged side by side along the length direction on the inner side wall of the groove body (1), and a plurality of secondary load-bearing supports (3) are arranged between two adjacent main load-bearing supports (2); A first rotating bracket (4) is provided on the front side of the main load-bearing bracket (2); a main support plate (21) is provided on the upper side of the main load-bearing bracket (2); a rotating structure (6) is provided at the front end of the main support plate (21); the first rotating bracket (4) is connected to the rotating structure (6); and the rotating structure (6) is driven to rotate by a driving mechanism (7); A second rotating bracket (5) is provided on the front side of the secondary load-bearing bracket (3); a secondary supporting plate (31) is provided on the upper side of the second rotating bracket (5); a limiting cylinder (32) is provided at the front end of the secondary supporting plate (31); and a limiting groove (53) cooperating with the limiting cylinder (32) is provided on the second rotating bracket (5); The first rotating bracket (4) comprises a first vertical plate (41) and a plurality of first horizontal plates (42), wherein the plurality of first horizontal plates (42) are arranged vertically side by side on the first vertical plate (41); The main support plate (21) is provided with a cover plate (22); the rotating structure (6) comprises a mounting frame (61) mounted in the cover plate (22); the mounting frame (61) is provided with a sprocket (62), an arc plate (63) and a chain (65); the arc plate (63) extends toward the front end of the main support plate (21); one side of the chain (65) is wound around the arc plate (63) and the other side is wound around the sprocket (62); a circle of convex teeth (66) is provided on the outer side of the chain (65); the chain (65) is driven to rotate by a driving mechanism (7); the first vertical plate (41) is provided with a row of grooves (44) along the length direction; the convex teeth (66) are wedged into the grooves (44).

2. A cable trench waterproof structure according to claim 1, characterized in that: The rotating structure (6) further comprises two straight plates (64) located at the upper and lower sides of the arc-shaped plate (63); the straight plate (64) located at the upper side of the arc-shaped plate (63) is arranged horizontally, and the straight plate (64) located at the lower side of the arc-shaped plate (63) is arranged vertically; and the chain (65) passes around the straight plates (64).

3. A cable trench waterproof structure according to claim 2, characterized in that: The arc-shaped plate (63) and the straight plate (64) are located at the opening on the front side of the cover plate (22); the straight plate (64) located on the upper side of the arc-shaped plate (63) is flush with the upper surface of the cover plate (22).

4. A cable trench waterproof structure according to claim 1, characterized in that: The first vertical plate (41) is provided with connecting plates (43) vertically along both sides thereof, a sliding bar (45) is provided on the upper portion of the connecting plate (43), and a sliding seat (23) cooperating with the sliding bar (45) is provided at the front end of the outer side surface of the cover plate (22).

5. A cable trench waterproof structure according to claim 4, characterized in that: A guide arc strip (24) is provided at the front end of the outer side surface of the cover plate (22), and the guide arc strip (24) is arranged concentrically with the arc plate (63); a horizontal guide straight strip (25) is provided on the outer side surface of the cover plate (22), and the guide straight strip (25) is aligned and connected with the upper end of the guide arc strip (24), and the lower end of the guide arc strip (24) is aligned with the upper side of the sliding seat (23); Two guide rollers (46) are provided in the middle of the connecting plate (43), the two guide rollers (46) engage with the guide arc strip (24) and the guide straight strip (25), and the guide rollers (46) are aligned with the lower side of the sliding strip (45).

6. A cable trench waterproof structure according to claim 1, characterized in that: The driving mechanism (7) comprises a worm wheel (71), a worm (72) and a connecting shaft (73); the worm wheel (71) is fixedly connected to the sprocket (62); the worm (72) cooperates with the worm wheel (71); one end of the connecting shaft (73) is connected to the worm (72); the other end is provided with a driven bevel gear (74); the driven bevel gear (74) is meshed with a driving bevel gear (75); and the driven bevel gear (74) is connected to a knob (76).

7. A cable trench waterproof structure according to claim 6, characterized in that: The knob (76) is hexagonal in shape, and the knob (76) is turned through the sleeve.

8. A cable trench waterproof structure according to claim 1, characterized in that: The second rotating bracket (5) comprises a second vertical plate (51) and a plurality of second horizontal plates (52), wherein the plurality of second horizontal plates (52) are arranged vertically and side by side on the second vertical plate (51); a top cover (54) is provided at the upper end of the limiting groove (53).

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