Fire-resistant bridge temperature regulation telescopic device

Abstract

The utility model relates to a kind of fireproof bridge temperature regulation telescopic device, it includes telescopic joint subassembly and cover plate subassembly constitute, telescopic joint subassembly contains symmetrically set in the telescopic section of middle section both sides, two sliding fit, telescopic section top wall's limiting bolt is embedded in the waist type slot of middle section, realize sliding guide and stroke control, cover plate subassembly includes fixed cover plate, movable cover plate and piano key telescopic sealing cover, fixed cover plate is fixedly connected telescopic section, movable cover plate buckling middle section, three are through piano key telescopic sealing cover telescopic cooperation, and device uses double fireproof structure of outer spraying fireproof coating and inner pasting nonmetal fireproof lining, when working, device can adapt to bridge thermal expansion and contraction, length is adjusted by telescopic joint subassembly, piano key telescopic sealing cover guarantees airtightness, have telescopic adjustment and long-term airtightness, fireproof performance is stable, structure is stable and installation maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the field of fire-resistant cable trays, and in particular to a temperature-regulating telescopic device for fire-resistant cable trays. Background Technology

[0002] In fields with high requirements for line safety, such as industrial power distribution and building fire protection, fire-resistant cable trays serve as key load-bearing and protective components for cable laying. Their core function is to maintain structural stability under extreme scenarios such as fires, and to ensure the normal power transmission capacity of internal cables by blocking high temperatures and flame attacks, thus buying valuable time for personnel evacuation, emergency equipment operation, and fire fighting.

[0003] However, in practical applications, fire-resistant cable trays are constantly exposed to fluctuations in ambient temperature. Seasonal changes, diurnal temperature variations, and even changes in local heat sources can all cause thermal expansion and contraction of the cable tray itself. Increased temperature causes thermal expansion of the cable tray, leading to deformation and failure of the connection points. In high-temperature summer scenarios or when ambient temperatures rise sharply, the metal or composite matrix material of the fire-resistant cable tray will stretch axially due to thermal expansion. Since the splicing structure of traditional cable trays is mostly rigid and lacks effective expansion and contraction allowance, the stress generated by the stretching will be concentrated at the joint of the cable tray, forcing the connection end to undergo arch-shaped deformation. This deformation will directly open the originally tightly fitted connection joint, destroy the sealing structure at the joint, and form a through gap, providing a path for the penetration of flames and high-temperature flue gas.

[0004] In winter, the temperature drop causes cable trays to shrink and contract, leading to tensile cracks at the connection points. In low winter temperatures or sudden drops in ambient temperature, the base material of the fire-resistant cable tray will shorten axially due to thermal shrinkage. At this time, the joint of the rigid connection will be subjected to tensile force generated by the material shrinkage, which will cause the sealing layer at the joint to break. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a fire-resistant cable tray temperature control telescopic device.

[0006] The present invention provides a fire-resistant cable tray temperature control expansion joint device, which adopts the following technical solution:

[0007] A temperature-regulating expansion joint device for fire-resistant cable trays includes an expansion joint assembly and a cover plate assembly. The expansion joint assembly includes an expansion segment and an intermediate segment. The expansion segment is disposed on both sides of the intermediate segment, and the expansion segment and the intermediate segment are slidably fitted. A limit bolt is provided on the top wall of the expansion segment. Symmetrically arranged waist-shaped grooves are formed on both sides of the top of the intermediate segment, and the limit bolt is embedded in the waist-shaped groove. The thickness of the limit bolt is equal to the thickness of the top wall of the intermediate segment. The cover plate assembly includes a fixed cover plate and a movable cover plate. The fixed cover plate is disposed on both sides of the movable cover plate, and the fixed cover plate is slidably fitted with the movable cover plate. The two sets of fixed cover plates are fixed on the expansion segment.

[0008] Optionally, the telescopic segment is provided with a non-metallic fireproof lining.

[0009] Optionally, the cover assembly further includes a piano key telescopic sealing cover, wherein the fixed cover and the movable cover are telescopically engaged via the piano key telescopic sealing cover.

[0010] Optionally, the fixing cover is fixed with screws to the end of the telescopic segment away from the intermediate segment.

[0011] Optionally, both the fixed cover plate and the movable cover plate are coated with a fire-retardant coating on their inner and outer surfaces.

[0012] Optionally, the telescopic segment is connected to the cable tray body on the side away from the intermediate segment.

[0013] In summary, this utility model has at least one of the following beneficial technical effects:

[0014] 1. By sliding the expansion joint with the intermediate joint, combined with the guide limit of the limiting bolt and the waist groove, the precise adjustment of the thermal expansion and contraction of the cable tray is realized, avoiding the deformation failure of the rigid connection. At the same time, the piano key expansion sealing cover deforms synchronously with the expansion and contraction, always fitting tightly with the expansion joint. Combined with the fireproof coating of the fixed cover plate and the movable cover plate, as well as the non-metallic fireproof lining of the expansion joint, it forms a full-time, full-area airtight protection.

[0015] 2. The fit between the limit bolt and the waist-shaped groove not only controls the direction and stroke of the telescopic movement, but also enhances the connection stability of the telescopic joint assembly, preventing jamming or detachment during sliding. The components of the device are fixed by conventional connectors such as screws and flanges. No complicated special tools are required during installation. Later maintenance only requires checking the condition of the limit bolt and the piano key telescopic sealing cover, which reduces the cost of use.

[0016] 3. It adopts a dual fireproof design with an external fireproof coating and an internal non-metallic fireproof lining. Both the inner and outer surfaces of the cover assembly have high temperature resistance. The non-metallic fireproof lining can resist the erosion of the telescopic section by the high temperature of the fire. The piano key telescopic sealing cover does not compromise the airtightness during the telescopic process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a temperature-regulating expansion joint for fire-resistant cable trays.

[0018] Figure 2 This is a schematic diagram of a temperature-regulating expansion joint for fire-resistant cable trays (excluding the cover plate assembly).

[0019] Explanation of reference numerals in the attached drawings: 1. Expansion joint assembly; 11. Expansion segment; 12. Intermediate segment; 13. Limit bolt; 14. Waist-shaped groove; 15. Non-metallic fireproof lining; 2. Cover plate assembly; 21. Fixed cover plate; 22. Movable cover plate; 23. Piano key telescopic sealing cover; 24. Screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] This utility model discloses a temperature-regulating expansion joint device for fire-resistant cable trays. (Refer to...) Figure 1-2The device includes an expansion joint assembly 1 and a cover plate assembly 2. The expansion joint assembly 1, as the core adjustment structure for the axial expansion and contraction of the cable tray, consists of an expansion section 11 and an intermediate section 12. The expansion section 11 is symmetrically arranged on both sides of the intermediate section 12, and the two are connected by a sliding fit, allowing the expansion section 11 to move freely along the axial direction of the intermediate section 12. To accurately control the sliding distance and direction of the expansion section 11 and prevent it from detaching from the intermediate section 12, a limit bolt 13 is fixedly installed on the top wall of the expansion section 11. Correspondingly, symmetrically distributed waist-shaped grooves 14 are provided on both sides of the top of the intermediate section 12. The ends of the limit bolts 13 are embedded in the waist-shaped grooves 14. When the expansion section 11 slides with the thermal expansion and contraction of the cable tray, the limit bolts 13 will move synchronously along the length direction of the waist-shaped grooves 14. The length of the waist-shaped grooves 14 is the maximum adjustment stroke of the expansion section 11, and its direction restricts the expansion section 11 to slide only along the axial direction of the cable tray, preventing structural jamming caused by lateral displacement.

[0024] The cover assembly 2 includes a fixed cover plate 21, a movable cover plate 22, and a key-type telescopic sealing cover 23. The fixed cover plates 21 are symmetrically arranged on both sides of the movable cover plate 22, and the three are telescopically connected by the key-type telescopic sealing cover 23. The two sets of fixed cover plates 21 are fastened to the telescopic sections 11 on both sides by screws 24, and the fixed position of the fixed cover plate 21 is located at the end of the telescopic section 11 away from the middle section 12. The movable cover plate 22 is correspondingly fastened to the top of the middle section 12. The fixed cover plate 21 and the movable cover plate 22 are connected into a whole by the key-type telescopic sealing cover 23. In order to further enhance the fire resistance, the inner and outer surfaces of the fixed cover plate 21 and the movable cover plate 22 are sprayed with a high-temperature resistant fireproof coating. At the same time, a non-metallic fireproof lining 15 is attached to the inside of the telescopic section 11, forming a double fireproof structure of outer coating and inner lining. The side of the telescopic section 11 away from the middle section 12 is fixedly connected to the cable tray body, so that the entire device and the cable tray form a continuous protection system.

[0025] The working principle of this utility model is as follows: When the ambient temperature rises, the main body of the cable tray is heated and extends axially, driving the telescopic segment 11 connected to it to move synchronously towards the middle segment 12. At this time, the limiting bolt 13 on the top wall of the telescopic segment 11 slides along the waist-shaped groove 14 of the middle segment 12. The waist-shaped groove 14 provides sufficient travel space for the extension of the telescopic segment 11. The fixed cover plate 21 fixed to the telescopic segment 11 moves synchronously with the telescopic segment 11, pushing the piano key telescopic sealing cover 23 to compress inward. Since the piano key telescopic sealing cover 23 has good extensibility, its inner side is always tightly attached to the outer side of the groove of the telescopic segment 11, and the movable cover plate 22 remains fixed to the middle segment 12. Through the compression deformation of the piano key telescopic sealing cover 23, the cover plate assembly 2 always covers the top of the cable tray and will not produce gaps due to expansion and contraction. The non-metallic fireproof lining 15 inside the telescopic segment 11 cooperates with the middle segment 12, and the fireproof coating of the cover plate assembly 2 maintains the airtightness.

[0026] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A temperature-regulating expansion joint for fire-resistant cable trays, characterized in that: The system includes an expansion joint assembly (1) and a cover plate assembly (2). The expansion joint assembly (1) includes an expansion segment (11) and an intermediate segment (12). The expansion segment (11) is disposed on both sides of the intermediate segment (12). The expansion segment (11) and the intermediate segment (12) are slidably fitted together. The top wall of the expansion segment (11) is provided with a limit bolt (13). The top two sides of the intermediate segment (12) are provided with symmetrically arranged waist-shaped grooves (14). The positioning bolt (13) is embedded in the waist-shaped groove (14). The thickness of the positioning bolt (13) is equal to the thickness of the top wall of the intermediate segment (12). The cover plate assembly (2) includes a fixed cover plate (21) and a movable cover plate (22). The fixed cover plate (21) is disposed on both sides of the movable cover plate (22). The fixed cover plate (21) and the movable cover plate (22) are telescopically coupled. The two sets of fixed cover plates (21) are fixed on the telescopic segment (11).

2. The fire-resistant cable tray temperature control telescopic device according to claim 1, characterized in that: The telescopic section (11) is provided with a non-metallic fireproof lining (15).

3. The fire-resistant cable tray temperature regulating telescopic device according to claim 1, characterized in that: The cover assembly (2) also includes a piano key telescopic sealing cover (23), and the fixed cover (21) and the movable cover (22) are telescopically engaged by the piano key telescopic sealing cover (23).

4. The fire-resistant cable tray temperature regulating telescopic device according to claim 1, characterized in that: The fixed cover plate (21) is fixed to the end of the telescopic segment (11) away from the intermediate segment (12) with screws (24).

5. The fire-resistant cable tray temperature control telescopic device according to claim 1, characterized in that: Both the fixed cover plate (21) and the movable cover plate (22) are coated with fire-retardant coating on their inner and outer surfaces.

6. The fire-resistant cable tray temperature control telescopic device according to claim 1, characterized in that: The telescopic segment (11) is connected to the main body of the cable tray on the side away from the intermediate segment (12).

Images