Composite steel cable bridge with reflective heat insulation fireproof layer

Abstract

A kind of composite steel cable bridge with reflective heat insulation fireproof layer, including cable bridge body, at least one through slot is provided at both sides of cable bridge body, the inner wall of both sides of cable bridge body is provided with mounting groove, rotating rod is rotatably connected in the inside of mounting groove and at the position corresponding to through slot, rotating rod is fixed with rotating piece on the outside, drive structure is installed in the inside of mounting groove, drive structure is used to drive rotating rod and rotating piece rotation, temperature sensor is assembled in the inside of cable bridge body, drive structure includes sliding piece, sliding piece is slidably connected in the inside of mounting groove, first rack is arranged on the side of sliding piece close to rotating rod, first gear is fixed on the outside of rotating rod, and first rack is meshed with first gear, following movement block is fixed on the side of sliding piece away from first gear.The present application can consider ventilation and heat dissipation and high temperature plugging, and can form staged fire prevention mechanism.

Description

Technical Field

[0001] This invention belongs to the field of cable trays, and particularly relates to a composite steel cable tray with a reflective heat insulation and fireproof layer. Background Technology

[0002] Cable trays are crucial supporting components in power transmission and distribution systems, used for carrying and laying cables. Composite steel cable trays, with their high structural strength, strong load-bearing capacity, and moderate manufacturing cost, are widely used in industrial plants, commercial buildings, and municipal engineering projects. With increasing demands for electrical safety, improving the fire resistance and thermal insulation performance of cable trays has become a key focus in the industry. Existing technologies often enhance the fire resistance of cable trays by adding fire-retardant coatings and sealing structures.

[0003] Existing fire-resistant steel cable trays generally suffer from the problem of simultaneously failing to adequately address ventilation and heat dissipation while maintaining fireproof sealing. Some cable trays have ventilation openings in their side walls to ensure daily heat dissipation, but these openings cannot be reliably sealed quickly in the event of a fire. Open flames and high-temperature smoke can easily enter the cable tray through the ventilation channels, igniting the internal cables. Some fire-resistant cable trays with fully enclosed structures have low ventilation and heat dissipation efficiency during normal operation, and the internal heat accumulation can accelerate the aging of the cable insulation layer, shortening the cable's lifespan. Summary of the Invention

[0004] The purpose of this invention is to provide a composite steel cable tray with a reflective heat insulation and fireproof layer, which can take into account both ventilation and heat dissipation and high temperature sealing, and can form a graded fire protection mechanism.

[0005] To achieve the above objectives, the specific technical solution of the composite steel cable tray with a reflective heat-insulating and fireproof layer of the present invention is as follows:

[0006] The cable tray includes a cable tray body, with at least one through groove on each side of the cable tray body. The inner walls of both sides of the cable tray body are provided with mounting grooves. A rotating rod is rotatably connected inside the mounting groove and at a position corresponding to the through groove. A rotating plate is fixed to the outer side of the rotating rod. A driving structure is installed inside the mounting groove to drive the rotating rod and the rotating plate to rotate. A temperature sensor is assembled inside the cable tray body.

[0007] The driving structure includes a sliding plate that is slidably connected to the inside of the mounting groove. A first rack is provided on the side of the sliding plate near the rotating rod. A first gear is fixed on the outside of the rotating rod, and the first rack is meshed with the first gear. A following moving block is fixed on the side of the sliding plate away from the first gear. A limit strip is vertically fixed inside the mounting groove, and the following moving block is slidably connected to the limit strip. A motor is installed at the bottom of the mounting groove. A threaded rod is fixed vertically upward at the output end of the motor, and the threaded rod is threadedly connected to the following moving block.

[0008] The motor is fitted with a heat shield on its outer side.

[0009] The installation groove is provided with a first storage compartment at the top and bottom of the through groove. The first storage compartment is filled with an expanding fireproof sealing material. Each first storage compartment is provided with a discharge port on the side facing the through groove.

[0010] A wax seal block is fixed inside the discharge port.

[0011] An installation plate is fixed inside the installation groove. A spring is fixed to one side of the installation plate. A sliding strip is rotatably connected to the end of the spring away from the installation plate. A first pull rope is fitted to the end of the sliding strip away from the spring. A fuse is installed at the end of the first pull rope away from the sliding strip. A second pull rope is fixed to the end of the fuse away from the first pull rope, and the second pull rope is connected to the inner wall of the installation groove.

[0012] A second rack is fixed to one side of the sliding plate. A rotating column is fixed inside the mounting groove at a position corresponding to the second rack. A second gear is rotatably connected to the outside of the rotating column, and the second gear meshes with the second rack.

[0013] A following gear is fixed to the outside of the sliding bar, and the following gear meshes with the second gear. A blade is also fixed to the outside of the sliding bar. A U-shaped fixing block is fixed inside the mounting groove at a position corresponding to the blade. Two symmetrically arranged conductive springs are installed inside the U-shaped fixing block, and the two conductive springs are in contact with each other.

[0014] The outer side of the sliding bar is rotatably connected to a sliding assembly frame, and the sliding assembly frame is interference-fitted with the sliding bar, and the sliding assembly frame is slidably connected to the rotating column.

[0015] The blade is initially positioned toward the side away from the U-shaped fixing block.

[0016] A blocking plate is fixed inside the mounting groove and outside the spring, and the blocking plate is used to block the following gear.

[0017] Both the cable tray body and the outer side of the rotating plate are provided with a reflective heat-insulating coating.

[0018] Beneficial effects:

[0019] By using a rotatable baffle plate in conjunction with a through-slot and a motor-driven structure linked to a temperature sensor, the opening and closing state of the through-slot can be switched according to the internal temperature. This balances daily ventilation and heat dissipation with the initial sealing requirements under high temperatures, adapting to different operating conditions. Furthermore, by incorporating a storage compartment for filling intumescent fire-resistant sealing material and a wax-sealing structure, the sealing and filling process can be passively triggered at high temperatures. The toothed structure at the end of the baffle plate enhances the sealing tightness, forming a graded response fireproof mechanism that strengthens the fire-resistant barrier capability of the cable tray. A mechanical triggering structure consisting of a fuse, spring, and gear transmission provides mechanical backup triggering under high-temperature conditions. Combined with a circuit-breaking structure using blades and conductive springs, it can simultaneously trigger early warning and power outages, improving operational safety under extreme conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure between the blocking plate, the rotating rod, and the teeth of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure between the rotating column, the first gear, and the teeth of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure between the motor, the first gear, and the first rack of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure between the through slot, the blocking plate, and the temperature sensor of the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a schematic diagram of the structure between the second rack, the second gear, and the second gear of the present invention.

[0027] Figure 8 This is a schematic diagram of the structure between the fuse, the following gear, and the conductive spring of the present invention.

[0028] Explanation of markings in the diagram:

[0029] 1. Cable tray body; 2. Through groove; 3. Rotating rod; 4. Rotating plate; 5. Sliding plate; 6. First rack; 7. First gear; 8. Following moving block; 9. Limiting strip; 10. Motor; 11. Threaded rod; 12. Second storage compartment; 13. Discharge port; 14. Wax sealing block; 15. Second rack; 16. Second gear; 17. Rotating column; 18. Mounting plate; 19. Following gear; 20. Sliding strip; 21. Blade; 22. U-shaped fixing block; 23. Conductive spring; 24. First pull rope; 25. Fuse; 26. Spring; 27. Blocking plate; 28. Tooth; 29. ​​Temperature sensor; 30. Mounting groove; 31. Second pull rope; 32. Sliding assembly frame; 33. First storage compartment. Detailed Implementation

[0030] To better understand the purpose, structure, and function of this invention, the following detailed description of a composite steel cable tray with a reflective heat-insulating and fireproof layer is provided in conjunction with the accompanying drawings.

[0031] Implementation example:

[0032] like Figures 1-8 The cable tray includes a cable tray body 1, with at least one through groove 2 on each side. The inner walls of both sides of the cable tray body 1 are provided with mounting grooves 30. A rotating rod 3 is rotatably connected inside the mounting groove 30 and at a position corresponding to the through groove 2. A rotating piece 4 is fixed to the outside of the rotating rod 3. A driving structure is installed inside the mounting groove 30 to drive the rotating rod 3 and the rotating piece 4 to rotate. A temperature sensor 29 is installed inside the cable tray body 1. A reflective heat-insulating coating is provided on the outside of both the cable tray body 1 and the rotating piece 4 to reduce the transfer of external radiant heat into the cable tray and improve the overall heat insulation performance of the cable tray. The reflective heat-insulating coating can be formed by coating and curing conventional solar heat-reflective heat-insulating coatings in the art, such as a heat-insulating coating using silicone-modified acrylic resin as the film-forming base material and compounded with rutile titanium dioxide and hollow glass microspheres as reflective fillers, to reduce the transfer of external radiant heat into the cable tray.

[0033] See appendix Figures 3-4The drive structure includes a sliding plate 5, which is slidably connected to the inside of the mounting groove 30. A first rack 6 is provided on the side of the sliding plate 5 near the rotating rod 3. A first gear 7 is fixed on the outside of the rotating rod 3, and the first rack 6 is meshed with the first gear 7. A following moving block 8 is fixed on the side of the sliding plate 5 away from the first gear 7. A limit strip 9 is vertically fixed inside the mounting groove 30, and the following moving block 8 is slidably connected to the limit strip 9. The limit strip 9 is used to constrain the movement direction of the following moving block 8, so that it can only move in a straight line along the vertical direction. A motor 10 is installed at the bottom of the mounting groove 30. A threaded rod 11 is fixed vertically upward at the output end of the motor 10, and the threaded rod 11 is threadedly connected to the following moving block 8. A temperature sensor 29 is electrically connected to the motor 10, which can transmit the detected temperature signal to the control unit, thereby controlling the start, stop and direction of the motor 10. A heat insulation cover is installed on the outside of the motor 10 to isolate the high temperature inside the mounting groove 30 and reduce the impact of high temperature on the operation of the motor 10.

[0034] When the motor 10 drives the threaded rod 11 to rotate, under the guidance of the threaded transmission and the limiting strip 9, the sliding plate 5 moves vertically along the moving block 8. Through the meshing transmission of the first rack 6 and the first gear 7, the linear motion of the sliding plate 5 is converted into the rotational motion of the rotating rod 3, which in turn drives the rotating plate 4 to swing, thereby realizing the switching between the open and closed states of the through slot 2.

[0035] See appendix Figure 6 The installation groove 30 has a first storage chamber 33 located at the top and bottom of the through groove 2. The first storage chamber 33 is filled with intumescent fireproof sealing material. Each first storage chamber 33 has a discharge port 13 on the side facing the through groove 2. A wax sealing block 14 is fixed in the discharge port 13. At room temperature, the wax sealing block 14 seals the discharge port 13 to prevent the intumescent fireproof sealing material from leaking out. Both ends of the rotating plate 4 are provided with teeth 28 to improve the tightness of the contact with the intumescent fireproof sealing material.

[0036] When the temperature around the cable tray rises to the melting point of the wax seal 14, the wax seal 14 melts due to heat. The expanding fireproof sealing material in the first storage chamber 33 expands due to heat and overflows through the discharge port 13, filling the gap between the rotating plate 4 and the inner wall of the through groove 2, improving the sealing performance of the through groove 2, and enhancing the barrier effect against open flames and high-temperature smoke.

[0037] If there are two channels 2, one above the other, a second storage compartment 12 is also provided between the two channels 2. The cable tray body 1 is also provided with discharge ports 13 at both the upper and lower ends of the second storage compartment 12. Wax sealing blocks 14 are provided inside the discharge ports 13.

[0038] See appendix Figures 7-8An installation plate 18 is fixed inside the installation groove 30. A spring 26 is fixed to one side of the installation plate 18. A sliding strip 20 is rotatably connected to the end of the spring 26 away from the installation plate 18. A first pull rope 24 is fitted to the end of the sliding strip 20 away from the spring 26. A fuse 25 is installed at the end of the first pull rope 24 away from the sliding strip 20. A second pull rope 31 is fixed to the end of the fuse 25 away from the first pull rope 24. The second pull rope 31 is connected to the inner wall of the installation groove 30. Under normal temperature conditions, the fuse 25 remains intact. The first pull rope 24 pulls the sliding strip 20, causing the spring 26 to be in a compressed and energy-storing state.

[0039] A second rack 15 is fixed on one side of the sliding plate 5. A rotating column 17 is fixed inside the mounting groove 30 at a position corresponding to the second rack 15. A second gear 16 is rotatably connected to the outside of the rotating column 17, and the second gear 16 meshes with the second rack 15.

[0040] A following gear 19 is fixed to the outside of the sliding bar 20, and the following gear 19 is meshed with the second gear 16. A blade 21 is also fixed to the outside of the sliding bar 20. A U-shaped fixing block 22 is fixed inside the mounting groove 30 at the position corresponding to the blade 21. Two symmetrically arranged conductive springs 23 are installed inside the U-shaped fixing block 22, and the two conductive springs 23 are in contact with each other to form a conductive detection circuit. The initial position of the blade 21 is set to the side away from the U-shaped fixing block 22 to prevent accidental contact of the conductive springs 23 under normal temperature conditions.

[0041] The outer side of the sliding bar 20 is rotatably connected to a sliding assembly frame 32, and the sliding assembly frame 32 is interference-fitted with the sliding bar 20. The sliding assembly frame 32 is also slidably connected to the rotating column 17, so that the sliding bar 20 can slide along the axial direction of the rotating column 17.

[0042] A blocking plate 27 is fixed inside the mounting slot 30 and outside the spring 26. The blocking plate 27 is used to limit the movement of the following gear 19 so that when the following gear 19 moves to the preset position, it just completes the engagement with the second gear 16.

[0043] When the internal temperature of the cable tray rises to the melting temperature of fuse 25, fuse 25 melts, the pulling force of the first pull rope 24 disappears, the spring 26 releases its elastic potential energy, and pushes the sliding bar 20 to slide along the axial direction of the rotating column 17 until the following gear 19 abuts against the blocking plate 27. At this time, the following gear 19 and the second gear 16 enter a meshing state. When the subsequent motor 10 drives the second gear 16 to rotate, the following gear 19 can drive the sliding bar 20 to rotate around its own axis, thereby driving the blade 21 to rotate synchronously. The blade 21 rotates between the two conductive springs 23 and separates them, thus disconnecting the detection circuit. After receiving the circuit disconnection signal, the control unit can trigger an audible and visual warning and cut off the power supply to the corresponding line, reducing the risk of electric shock and fire spread. The blade 21 is made of insulating material to ensure that the two conductive springs 23 are in a reliable insulating state after separation.

[0044] Working principle:

[0045] Overall Workflow Description: Under normal ventilation and heat dissipation conditions, motor 10 drives threaded rod 11 to rotate, which in turn drives rotating plate 4 to swing to the open position through the transmission structure, keeping the through groove 2 open. Outside air can enter the cable tray body 1 through the through groove 2, achieving air circulation and heat dissipation, and reducing the operating temperature of the internal cables. When the internal temperature of the cable tray body 1 rises, and temperature sensor 29 detects that the temperature has reached a preset threshold, it sends a signal to the control unit. The control unit drives motor 10 to rotate in the opposite direction, causing rotating plate 4 to swing to the sealing position, forming a preliminary seal on the through groove 2, reducing the entry of outside hot air and smoke into the cable tray. If the temperature continues to rise, wax sealing block 14 melts due to heat, and the expanding fireproof sealing material in the first storage chamber 33 expands due to heat and overflows from discharge port 13, filling the gap between rotating plate 4 and through groove 2, further improving the sealing performance and enhancing the fireproof and heat insulation effect. If the temperature rises further to the melting threshold of fuse 25, fuse 25 melts, spring 26 pushes slide bar 20 to move, so that follower gear 19 meshes with second gear 16; at this time, if temperature sensor 29 detects that the temperature continues to rise, control unit drives motor 10 to run further, driving rotating plate 4 to complete tight sealing, and at the same time driving blade 21 to rotate through gear transmission, cutting off the detection circuit of conductive spring 23, triggering warning and power-off operation.

[0046] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A composite steel cable tray with a reflective, heat-insulating, and fire-resistant layer, comprising a cable tray body (1), characterized in that, The cable tray body (1) has at least one through groove (2) on both sides. The inner walls of both sides of the cable tray body (1) have mounting grooves (30). A rotating rod (3) is rotatably connected inside the mounting groove (30) and at the position corresponding to the through groove (2). A rotating piece (4) is fixed on the outside of the rotating rod (3). A driving structure is installed inside the mounting groove (30). The driving structure is used to drive the rotating rod (3) and the rotating piece (4) to rotate. A temperature sensor (29) is installed inside the cable tray body (1).

2. The composite steel cable tray according to claim 1, characterized in that, The driving structure includes a sliding plate (5), which is slidably connected to the inside of the mounting groove (30). A first rack (6) is provided on the side of the sliding plate (5) near the rotating rod (3). A first gear (7) is fixed on the outside of the rotating rod (3), and the first rack (6) meshes with the first gear (7). A following moving block (8) is fixed on the side of the sliding plate (5) away from the first gear (7). A limit strip (9) is vertically fixed inside the mounting groove (30), and the following moving block (8) is slidably connected to the limit strip (9). A motor (10) is installed at the bottom of the mounting groove (30). A threaded rod (11) is vertically fixed at the output end of the motor (10), and the threaded rod (11) is threadedly connected to the following moving block (8).

3. The composite steel cable tray according to claim 2, characterized in that, The motor (10) is fitted with a heat shield on its outer side.

4. The composite steel cable tray according to claim 2, characterized in that, The installation groove (30) is provided with a first storage compartment (33) at the top and bottom of the through groove (2). The first storage compartment (33) is filled with an expanding fireproof sealing material. Each first storage compartment (33) is provided with a discharge port (13) on the side facing the through groove (2).

5. The composite steel cable tray according to claim 4, characterized in that, A wax seal block (14) is fixed inside the discharge port (13).

6. The composite steel cable tray according to claim 2, characterized in that, An installation piece (18) is fixed inside the mounting groove (30). A spring (26) is fixed on one side of the installation piece (18). A sliding strip (20) is rotatably connected to one end of the spring (26) away from the installation piece (18). A first pull rope (24) is fitted to one end of the sliding strip (20) away from the spring (26). A fuse (25) is installed at one end of the first pull rope (24) away from the sliding strip (20). A second pull rope (31) is fixed to one end of the fuse (25) away from the first pull rope (24), and the second pull rope (31) is connected to the inner wall of the mounting groove (30).

7. The composite steel cable tray according to claim 6, characterized in that, A second rack (15) is fixed on one side of the sliding plate (5). A rotating column (17) is fixed inside the mounting groove (30) at a position corresponding to the second rack (15). A second gear (16) is rotatably connected to the outside of the rotating column (17), and the second gear (16) meshes with the second rack (15). A following gear (19) is fixed to the outside of the sliding bar (20), and the following gear (19) meshes with the second gear (16). A blade (21) is also fixed to the outside of the sliding bar (20). A U-shaped fixing block (22) is fixed inside the mounting groove (30) at the position corresponding to the blade (21). Two symmetrically arranged conductive springs (23) are installed inside the U-shaped fixing block (22), and the two conductive springs (23) are in contact with each other. The outer side of the sliding bar (20) is rotatably connected to a sliding assembly frame (32), and the sliding assembly frame (32) is interference-fitted with the sliding bar (20), and the sliding assembly frame (32) is slidably connected with the rotating column (17).

8. The composite steel cable tray according to claim 7, characterized in that, The blade (21) is initially positioned toward the side away from the U-shaped fixing block (22).

9. The composite steel cable tray according to claim 7, characterized in that, A blocking plate (27) is fixed inside the mounting groove (30) and outside the spring (26), and the blocking plate (27) is used to block the following gear (19).

10. The composite steel cable tray according to claim 1, characterized in that, The outer sides of both the cable tray body (1) and the rotating plate (4) are provided with a reflective heat insulation coating.

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