A telescopic long-span cable tray

Abstract

This utility model relates to a large-span cable tray, specifically a telescopic large-span cable tray, including a cable tray and an expansion joint. The cable tray and the expansion joint are respectively provided with positioning openings and expansion slots, the positioning openings extending to both sides of the cable tray. This utility model utilizes the energy storage and release characteristics of the elastic telescopic mechanism. When the cable tray shifts due to external environmental factors such as temperature changes or foundation settlement, the elastic telescopic mechanism first absorbs the displacement through elastic deformation. After the external force disappears, the elastic potential energy is automatically released, driving the cable tray to precisely return to its initial state. This design effectively solves the technical problem of existing expansion joints being unable to self-reset, preventing the cable tray from being in a displaced state for extended periods, effectively alleviating the pulling force of the cable tray displacement on the internal cables, preventing cable joints from loosening due to prolonged tautness, significantly improving the reliability of cable joints, and reducing safety hazards caused by cable connection failures.

Description

Technical Field

[0001] This utility model relates to a large-span cable tray, specifically a telescopic large-span cable tray. Background Technology

[0002] Cable trays are rigid structural systems used to support and protect cables. They are widely used in power, communications, and industrial fields. They consist of trays, ladders, supports, brackets, and accessories. Through standardized design, they enable the orderly laying of cables, combining functionality and safety. Large-span cable trays are cable laying devices that can provide support and protection for cables over long distances. The span can generally reach 6 to 9 meters or longer, reducing the number of support points.

[0003] During operation, cable trays and the cables they lay will experience thermal expansion and contraction due to changes in ambient temperature. For example, when the temperature rises in summer, the cable tray and cable materials expand due to heat, while they contract when the temperature drops in winter. If this stress from thermal expansion and contraction is not released, it will damage the structure of the cable tray. Large-span cable trays, due to their long length, experience greater displacement due to thermal expansion and contraction. Without expansion joints, this can cause the cable tray to bend, twist, or even break, and it will also damage the cables, affecting their normal operation.

[0004] Expansion joints mainly adapt to the thermal expansion and contraction of cable trays along their laying length by reserving a certain expansion gap. The sliding components inside the expansion joint passively compensate for temperature difference expansion and contraction, providing a space for expansion and contraction for the cable tray and cables, thereby effectively releasing the stress generated by thermal expansion and contraction.

[0005] Traditional expansion joints have the defect that they cannot automatically return to their original position after the cable tray is displaced by the external environment. This causes the cable tray to be in a state of displacement for a long time, resulting in the accumulation of structural stress and affecting the stability and service life of the cable tray. In addition, when the cable tray is displaced, it will pull on the internal cables. It cannot buffer the force on the internal cables, which easily causes the cables to be in a state of taut stress for a long time. This can lead to the loosening of the cable joints due to continuous stress, affecting the reliability of the circuit connection and even causing safety hazards. Utility Model Content

[0006] The purpose of this invention is to provide a telescopic long-span cable tray to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A telescopic long-span cable tray includes a cable tray and an expansion joint. The cable tray and the expansion joint are respectively provided with positioning openings and expansion grooves. The positioning openings extend to both sides of the cable tray and correspond to the expansion grooves. A fixing pin with a nut threaded onto the fixing pin is provided in the positioning opening. The fixing pin is slidably mounted on the expansion groove and is provided with a limit sliding mechanism. A support frame and a sliding lifting mechanism located at the bottom of the support frame are fixedly connected to one side of the expansion joint. An elastic reset mechanism is fixedly installed between the support frame and the sliding lifting mechanism.

[0009] As described above, the telescopic long-span cable tray includes a beveled block mounted on the fixing pin and a slot on the beveled block. The fixing pin passes through the slot and is secured to the beveled block by a nut.

[0010] As described above, the telescopic long-span cable tray has a fastening bolt on the rear side of the support frame, and the support frame is fixedly installed on the expansion joint by the fastening bolt.

[0011] The telescopic long-span cable tray described above: the sliding lifting mechanism includes two guide columns fixed to the bottom of the support frame and a lifting plate slidably installed at the bottom of the two guide columns, with a limit block fixedly installed at the bottom of the lifting plate.

[0012] As described above, the telescopic long-span cable tray has a beveled bottom and a beveled top, and the limiting plug and the beveled block are engaged in a squeezing and sliding fit.

[0013] The telescopic long-span cable tray described above has an elastic reset mechanism comprising two cylinders fixedly installed at the bottom of the support frame and a sliding cavity opened within the cylinder, wherein a sliding disc is slidably installed on the sliding cavity.

[0014] As described above, the telescopic long-span cable tray includes a fixed column fixedly installed at the bottom of the sliding plate and a spring sleeved on the fixed column. The top of the spring abuts against the bottom of the cylinder, and the fixed column is fixedly connected to the lifting plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the energy storage and release characteristics of the elastic telescopic mechanism, when the cable tray is displaced due to external environmental factors such as temperature changes or foundation settlement, the elastic telescopic mechanism will first absorb the displacement through elastic deformation; after the external force disappears, the elastic potential energy is automatically released, driving the cable tray to accurately return to its initial state. This design effectively solves the technical problem that existing expansion joints cannot reset themselves, can prevent the cable tray from being in a displacement state for a long time, effectively alleviates the pulling force of the cable tray displacement on the internal cables, prevents the cables from becoming loose due to long-term tautness, significantly improves the reliability of the cable interface, and reduces the safety hazards caused by cable connection failures.

[0016] This utility model, through the adaptive adjustment capability of the elastic telescopic mechanism, can not only buffer the load during displacement, but also maintain the linear accuracy of the cable tray through automatic reset, reducing the maintenance costs caused by manual intervention in reset; compared with the operation mode of traditional expansion joints that require regular inspection and adjustment, this design can reduce the frequency of maintenance, avoid fatigue damage to the support and fasteners caused by the additional stress caused by long-term cable tray misalignment, and enhance the overall safety of the system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a telescopic, large-span cable tray.

[0018] Figure 2 This is a schematic diagram of the cable tray and expansion joint structure in a telescopic long-span cable tray.

[0019] Figure 3 This is a schematic diagram showing the disassembled structure of the cable tray and expansion joint in a telescopic long-span cable tray.

[0020] Figure 4 This is a schematic diagram of the cable tray and sliding limit mechanism in a telescopic long-span cable tray.

[0021] Figure 5 This is a schematic diagram of the expansion joint, cable tray, and sliding limit mechanism in a telescopic long-span cable tray.

[0022] Figure 6 This is a schematic diagram of the expansion joint, sliding lifting mechanism, and elastic reset mechanism in a telescopic long-span cable tray.

[0023] Figure 7 This is a schematic diagram of the sliding lifting mechanism and the elastic reset mechanism in a telescopic long-span cable tray.

[0024] Figure 8 This is a schematic diagram of the internal structure of the elastic reset mechanism in a telescopic long-span cable tray.

[0025] Figure 9This is a schematic diagram of the sliding limit mechanism, sliding lifting mechanism, and elastic reset mechanism in a telescopic long-span cable tray.

[0026] Figure 10 This is a rear view schematic diagram of the sliding limit mechanism, sliding lifting mechanism, and elastic reset mechanism in a telescopic long-span cable tray.

[0027] In the diagram: 1. Cable tray; 2. Expansion joint; 3. Positioning opening; 4. Expansion groove; 5. Fixing pin; 6. Nut; 7. Beveled block; 8. Slot; 9. Limiting block; 10. Lifting plate; 11. Support frame; 12. Fastening bolt; 13. Guide column; 14. Cylinder; 15. Sliding cavity; 16. Sliding disc; 17. Spring; 18. Fixing column. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Please see Figures 1-10 As an embodiment of this utility model, the telescopic long-span cable tray 1 includes a cable tray 1 and a telescopic joint 2. The cable tray 1 and the telescopic joint 2 are respectively provided with positioning openings 3 and telescopic grooves 4. The positioning openings 3 extend to both sides of the cable tray 1 and correspond to the telescopic grooves 4. A fixing pin 5 is provided on the positioning opening 3 and a nut 6 is threadedly connected to the fixing pin 5. The fixing pin 5 is slidably installed on the telescopic groove 4. A limit sliding mechanism is provided on the fixing pin 5. A support frame 11 and a sliding lifting mechanism provided at the bottom of the support frame 11 are fixedly connected to one side of the telescopic joint 2. An elastic reset mechanism is fixedly installed between the support frame 11 and the sliding lifting mechanism.

[0030] In this embodiment, the telescopic large-span cable tray 1 has an expansion joint 2 positioned between two cable trays 1, providing a certain expansion gap to accommodate the thermal expansion and contraction of the cable tray 1 along its laying length. When the cable tray 1 is displaced due to external environmental influences, it will simultaneously drive the limiting sliding mechanism to slide on the expansion groove 4 of the expansion joint 2. During the movement of the cable tray 1, the sliding lifting mechanism will be squeezed and lifted, while compressing the elastic reset mechanism. The displacement is absorbed through elastic deformation. After the external force disappears, the elastic potential energy is automatically released, driving the cable tray 1 to accurately return to its initial state. At the same time, this telescopic large-span cable tray 1 supports the return capability after bidirectional displacement, so that the displacement of the cable tray 1 in both directions can be reset by the elastic reset mechanism. This design effectively solves the technical problem that the existing expansion joint 2 cannot reset itself, avoids the cable tray 1 being in a displaced state for a long time, effectively alleviates the pulling force of the cable tray 1 displacement on the internal cables, prevents the cables from becoming loose due to long-term tautness, significantly improves the reliability of the cable interface, and reduces the safety hazards caused by cable connection failures.

[0031] As a further embodiment of this utility model, the limiting sliding mechanism includes a chamfered block 7 disposed on the fixed pin 5 and a slot 8 formed on the chamfered block 7, the fixed pin 5 passing through the slot 8, and the fixed pin 5 fastening the chamfered block 7 by a nut 6.

[0032] In this embodiment, during assembly, the expansion joint 2 is moved between the two cable trays 1, and the positioning opening 3 is aligned with the expansion groove 4. Then, multiple fixing pins 5 pass through the expansion groove 4 and the positioning opening 3 assembly and are fixed by nuts 6. After assembly, the cable tray 1 can be displaced on the expansion groove 4 reserved in the expansion joint 2. The fixing pins 5 pass through the slot 8 of the inclined block 7 and are fixed by nuts 6.

[0033] As a further embodiment of this utility model, a fastening bolt 12 is provided on the rear side of the support frame 11, and the support frame 11 is fixedly installed on the expansion joint 2 by the fastening bolt 12.

[0034] In this embodiment, the support frame 11 is configured as four groups, and each group of support frame 11 is fixed to the expansion joint 2 by fastening bolts 12.

[0035] As a further embodiment of this utility model, the sliding lifting mechanism includes two guide posts 13 fixed to the bottom of the support frame 11 and a lifting plate 10 slidably installed at the bottom of the two guide posts 13, with a limit block 9 fixedly installed at the bottom of the lifting plate 10.

[0036] In this embodiment, two guide posts 13 provide sliding support for the lifting plate 10, and a limiting block 9 is disposed at the bottom of the lifting plate 10.

[0037] As a further embodiment of this utility model, the bottom end of the limiting plug 9 is designed with a bevel, the top end of the beveled block 7 is designed with a bevel, and the limiting plug 9 and the beveled block 7 are engaged in a pressing and sliding fit.

[0038] In this embodiment, the bevel at the bottom of the limiting insert 9 is in contact with the bevel of the beveled block 7.

[0039] As a further embodiment of this utility model, the elastic reset mechanism includes two cylindrical bodies 14 fixedly installed at the bottom of the support frame 11 and a sliding cavity 15 opened in the cylindrical body 14, and a sliding disk 16 is slidably installed on the sliding cavity 15.

[0040] In this embodiment, the sliding cavity 15 inside the cylinder 14 is cylindrical, and the sliding disk 16 slides on the sliding cavity 15.

[0041] As a further embodiment of this utility model, the elastic reset mechanism also includes a fixed post 18 fixedly installed at the bottom of the sliding disk 16 and a spring 17 sleeved on the fixed post 18. The top of the spring 17 abuts against the bottom of the cylinder 14, and the fixed post 18 is fixedly connected to the lifting plate 10.

[0042] In this embodiment, when the cable tray 1 is displaced due to external environmental influences, it will simultaneously drive the inclined block 7 to move. At this time, the inclined side of the inclined block 7 and the inclined angle of the bottom end of the limiting plug 9 are connected, and a force is applied to the limiting plug 9, causing the limiting plug 9 and the lifting plate 10 to move upward. When the lifting plate 10 moves, it will squeeze the fixing column 18 into the cylinder 14. At this time, the spring 17 is squeezed between the cylinder 14 and the fixing column 18, causing the spring 17 to be compressed. The displacement is absorbed through elastic deformation. After the external force disappears, the elastic potential energy of the spring 17 is automatically released, driving the limiting plug 9 and the lifting plate 10 to move downward. The inclined side of the limiting plug 9 and the inclined block 7 are squeezed together, causing the inclined block 7 to move closer to the center of the telescopic groove 4, thereby driving the cable tray 1 to accurately return to the initial state.

[0043] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A telescopic long-span cable tray, comprising a cable tray (1) and an expansion joint (2), characterized in that, The cable tray (1) and the expansion joint (2) are respectively provided with positioning openings (3) and expansion grooves (4). The positioning openings (3) extend through to both sides of the cable tray (1). The positioning openings (3) correspond to the expansion grooves (4). The positioning openings (3) are provided with fixing pins (5) and nuts (6) threadedly connected to the fixing pins (5). The fixing pins (5) are slidably installed on the expansion grooves (4). The fixing pins (5) are provided with a limit sliding mechanism. The expansion joint (2) is fixedly connected to one side with a support frame (11) and a sliding lifting mechanism provided at the bottom of the support frame (11). An elastic reset mechanism is fixedly installed between the support frame (11) and the sliding lifting mechanism. The limiting sliding mechanism includes a chamfered block (7) disposed on the fixed pin (5) and a slot (8) opened on the chamfered block (7). The fixed pin (5) passes through the slot (8), and the fixed pin (5) is fastened to the chamfered block (7) by a nut (6). A fastening bolt (12) is provided on the rear side of the support frame (11), and the support frame (11) is fixedly installed on the expansion joint (2) by the fastening bolt (12); The sliding lifting mechanism includes two guide columns (13) fixed at the bottom of the support frame (11) and a lifting plate (10) slidably installed at the bottom of the two guide columns (13). A limit block (9) is fixedly installed at the bottom of the lifting plate (10). The bottom end of the limiting plug (9) is designed with a bevel, and the top end of the bevel block (7) is designed with a bevel. The limiting plug (9) and the bevel block (7) are squeezed and slid together.

2. The telescopic long-span cable tray according to claim 1, characterized in that, The elastic reset mechanism includes two cylinders (14) fixedly installed at the bottom of the support frame (11) and a sliding cavity (15) opened in the cylinder (14), on which a sliding disk (16) is slidably installed.

3. A telescopic long-span cable tray according to claim 2, characterized in that, The elastic reset mechanism also includes a fixed column (18) fixedly installed at the bottom of the sliding plate (16) and a spring (17) sleeved on the fixed column (18). The top of the spring (17) abuts against the bottom of the cylinder (14), and the fixed column (18) is fixedly connected to the lifting plate (10).

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