Combined hot-dip galvanized cable bridge with multiple protections

Abstract

The application discloses a combined hot-dip galvanized cable bridge with multiple protections, and belongs to the technical field of cable bridges, which comprises multiple bridge groups, suspension rods, sealing mechanisms and protection assemblies; the suspension rods are used for hoisting the bridge groups; two adjacent bridge groups are assembled in a plug-in mode; the sealing mechanism comprises air bags, pressing plates, fixing bolts and rubber sealing pipes; the pressing plates can extrude the air bags, and the air bags are in communication with the rubber sealing pipes; in the application, a plug-in modular combined structure is adopted, the bridge groups are positioned in a plug-in mode through splicing ends and access ends, the same fixing bolt is used for locking and fixing two bridge groups and simultaneously driving the sealing mechanism to seal the splicing gaps, one-step connection, fixation and sealing operation is realized, field assembly procedures are simplified, the inflatable rubber sealing pipes can be self-adapted to assembly tolerances, the sealing gaskets are matched to form double sealing, water vapor and dust are effectively blocked from invading the inside of the bridge groups, and the protection performance is excellent.

Description

Technical Field

[0001] This invention belongs to the field of cable tray technology, specifically a combined hot-dip galvanized cable tray with multiple protection features. Background Technology

[0002] Cable trays are an indispensable infrastructure in power systems, industrial buildings, rail transit, chemical projects, and coastal engineering. They primarily support, arrange, and protect power cables, control cables, and communication cables. Their structural reliability, corrosion resistance, and sealing capabilities directly affect the operational safety of cable lines and the stability of the entire power supply system. In application scenarios such as chemical plants, coastal areas, and underground industrial pipe corridors—where there is high humidity, high salt spray, and corrosive volatile media—cable trays not only need sufficient structural strength but also must withstand the continuous erosion of moisture, salt spray dust, and corrosive gases. This places high demands on the assembly process, sealing protection, and corrosion protection system of the cable trays.

[0003] Traditional cable trays involve independent splicing and sealing. Conventional products rely solely on bolts for mechanical locking between tray units, leaving assembly gaps at joints and between the tray and cover plate. Even with the addition of sealing strips, the alignment, application, and tightening of the seals must be performed separately from the bolt tightening process, resulting in numerous on-site steps, a large assembly workload, and low efficiency. Furthermore, ordinary solid sealing strips provide static sealing, offering poor adaptability to dimensional tolerances introduced during cable tray processing and assembly. Fluctuations in joint size can easily lead to incomplete sealing, allowing moisture, salt spray, and dust to seep into the tray's interior, corroding cable insulation and shortening cable lifespan. Summary of the Invention

[0004] The purpose of this invention is to provide a combined hot-dip galvanized cable tray with multiple protections to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a combined hot-dip galvanized cable tray with multiple protections, comprising multiple cable trays, suspension rods, sealing mechanisms, and protective components;

[0006] The suspension rod is used to hoist the cable tray; adjacent sets of cable trays are connected by a plug-in assembly.

[0007] The sealing mechanism includes an airbag, a pressure plate, a fixing bolt, and a rubber sealing tube. The pressure plate can compress the airbag, and the airbag is connected to the inside of the rubber sealing tube. The fixing bolt is used to drive the pressure plate to compress the airbag, so that the gas in the airbag fills the rubber sealing tube, and the rubber sealing tube expands and fills the assembly gap.

[0008] The protective component includes a cable tray cover plate, which covers the opening at the upper end of the cable tray.

[0009] As a further preferred embodiment of this technical solution: each group of cable trays is provided with a small-mouth splicing end at one end and a large-mouth access end at the other end; adjacent cable trays are pre-positioned by inserting the splicing end into the access end.

[0010] As a further preferred embodiment of this technical solution: the sealing mechanism is further provided with a receiving groove and a bolt limiting hole; the receiving groove is opened at the splicing end, the airbag is arranged inside the receiving groove, the pressure plate is slidably assembled in the receiving groove and abuts against the airbag; the bolt limiting hole is opened at the splicing end.

[0011] As a further preferred embodiment of this technical solution: the bolt limiting hole is a non-circular hole, and the shape of the tail end of the fixing bolt is adapted to the bolt limiting hole to restrict the circumferential rotation of the fixing bolt; the fixing bolt passes through the bolt limiting hole, the pressure plate, and the reserved through hole of the airbag in sequence, and exits from the reserved through hole at the access end, and the protruding end of the fixing bolt is fitted with a locking nut.

[0012] As a further preferred embodiment of this technical solution: a sealing groove is provided at the junction of the cable tray and the cable tray cover plate, and the rubber sealing tube is installed inside the sealing groove.

[0013] As a further preferred embodiment of this technical solution: the protective component also includes a sealing gasket, and sealing gaskets are provided at both ends of the cable tray cover plate; the sealing gasket cooperates with the inflated rubber sealing tube to achieve double sealing.

[0014] As a further preferred embodiment of this technical solution: the inner cavity of the cable tray is provided with cable limiting buckles arranged in an array along the length direction, and the cable limiting buckles are used to clamp, separate and fix the cables.

[0015] As a further preferred embodiment of this technical solution: the cable tray, suspension rod, and fixing bolts are all treated with hot-dip galvanizing for corrosion protection.

[0016] As a further preferred embodiment of this technical solution: after the rubber sealing tube is inflated, it simultaneously fills the splicing gap between adjacent cable trays and the assembly gap between the cable tray and the cable tray cover plate.

[0017] As a further preferred embodiment of this technical solution: tightening the locking nut can pull the fixing bolt to move, causing the pressure plate to slide in the receiving groove to compress the airbag and squeeze out the gas inside the airbag.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, a plug-in modular combination structure is adopted. The cable trays are pre-positioned by plugging in the splicing end and the access end. The same fixing bolt is used to lock and fix the two sections of the cable tray, and simultaneously drive the sealing mechanism to seal the splicing gap. The connection, fixing and sealing operations are completed in one step, simplifying the on-site assembly process. The inflatable rubber sealing tube can adapt to the assembly tolerance and form a double seal with the sealing gasket, effectively preventing water vapor and dust from entering the inside of the cable tray, and has excellent protective performance.

[0020] 2. In this invention, the cable tray body, suspension rods, and fixing bolts are all treated with hot-dip galvanizing for corrosion protection and are equipped with passivation and sealing processes. The edges and corners of the cable tray are rolled, and combined with the airtight protection of the sealing mechanism, a multi-protection system is formed, which can adapt to harsh working conditions such as coastal areas and chemical plants with high salt spray and high condensation, improve the overall service life of the cable tray, and reduce the later maintenance costs.

[0021] 3. In this invention, a cable limiting buckle is provided to separate and limit the cable, preventing the cable from getting tangled and rubbing against the cable insulation layer; during maintenance, simply loosen the locking nut and the rubber sealing tube will depressurize and shrink, making it easy to open the cover or disassemble the cable tray unit, making cable maintenance, capacity expansion and disassembly operations convenient; at the same time, multiple optional implementation methods are provided, and bolt anti-rotation structure and flame-retardant gasket can be selected according to the usage scenario, making the product highly adaptable. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a combined hot-dip galvanized cable tray with multiple protection features according to the present invention.

[0023] Figure 2 This is an internal structural diagram of a combined hot-dip galvanized cable tray with multiple protection features according to the present invention.

[0024] Figure 3 This is a partial structural schematic diagram of a combined hot-dip galvanized cable tray with multiple protections according to the present invention.

[0025] Figure 4 This is a partial structural cross-section of a combined hot-dip galvanized cable tray with multiple protection features according to the present invention. Figure 1 ;

[0026] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0027] Figure 6 This is a partial structural cross-section of a combined hot-dip galvanized cable tray with multiple protection features according to the present invention. Figure 2 ;

[0028] Figure 7 for Figure 6 Enlarged view of section B in the middle.

[0029] Legend: 1. Cable tray; 11. Splice end; 12. Connection end; 2. Suspension rod;

[0030] Sealing mechanism: 301, rubber sealing tube; 302, air bladder; 303, receiving groove; 304, pressure plate; 305, fixing bolt; 306, sealing groove; 307, bolt limiting hole;

[0031] Protective components: 401, cable tray cover; 402, sealing gasket. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1:

[0036] Please see Figures 1-7 As shown, the present invention provides a technical solution: a combined hot-dip galvanized cable tray with multiple protections, including multiple cable trays 1, suspension rods 2, sealing mechanisms, and protective components. The suspension rods 2 are used to hoist and fix the cable trays 1 to the building roof.

[0037] In this embodiment, the base material of the cable tray 1 is Q235 carbon steel. The cable tray body, suspension rod 2, and fixing bolt 305 are all hot-dip galvanized, and the thickness of the hot-dip galvanized zinc layer is controlled at 85-120μm. After hot-dip galvanizing, passivation and sealing treatment is performed to seal the micropores on the zinc layer surface, forming a double anti-corrosion protective layer, reducing the corrosion rate in salt spray and condensation environments. All edges and corners of the cable tray are rolled to eliminate sharp burrs and avoid scratching the cable sheath and construction personnel.

[0038] Each cable tray 1 has a small-mouth splicing end 11 at one end and a large-mouth access end 12 at the other end. When assembling the cable trays, the splicing end 11 of one set of cable trays is inserted into the access end 12 of another set of cable trays to complete the pre-positioning of the two cable trays. The large and small mouths are connected with a small assembly gap, which facilitates on-site alignment and insertion. On the other hand, the gap can be filled by the subsequently expanded rubber sealing tube 301, without the need for precision grinding of the splicing end face.

[0039] Furthermore, the sealing mechanism includes a rubber sealing tube 301, an airbag 302, a receiving groove 303, a pressure plate 304, a fixing bolt 305, a sealing groove 306, and a bolt limiting hole 307. The receiving groove 303 is located at the splicing end 11. The airbag 302 is placed inside the receiving groove 303. The pressure plate 304 is slidably assembled in the receiving groove 303, and the end face of the pressure plate 304 is in contact with the airbag 302. The splicing end 11 has a non-circular bolt limiting hole 307. In this embodiment, the bolt limiting hole 307 is a square hole. The tail end of the fixing bolt 305 is processed into a square flat head. The square flat head is inserted into the square bolt limiting hole 307, thereby restricting the circumferential rotation of the fixing bolt 305. When tightening the nut, there is no need to use an additional wrench to hold the tail of the bolt.

[0040] In this embodiment, a sealing groove 306 is formed at the junction of the cable tray 1 and the cable tray cover plate 401, and the rubber sealing tube 301 is assembled in the sealing groove 306. A small ventilation channel is provided between the airbag 302 and the rubber sealing tube 301 to achieve interconnection of the internal cavities. The gas discharged from the airbag under pressure can enter the rubber sealing tube 301 to inflate it. The airbag 302 is made of aging-resistant nitrile rubber, and the rubber sealing tube 301 is made of weather-resistant EPDM rubber, which can resist outdoor ultraviolet rays and oil corrosion, and extend the service life of the seals.

[0041] The protective components include a cable tray cover plate 401 and a sealing gasket 402. The sealing gasket 402 is fixed at both ends of the cable tray cover plate 401. The sealing gasket 402 is made of foamed rubber and is bonded to the end faces of both ends of the cable tray cover plate 401. The cable tray cover plate 401 can cover the upper opening of the cable tray 1. Multiple sets of cable limiting buckles are arranged in an array along the length direction inside the cavity of the cable tray 1. The cable limiting buckles are elastic buckle structures. The cable can be snapped into the cable limiting buckles to achieve cable separation and positioning, avoid the cables from tangling and squeezing each other, and reduce cable shaking and friction damage to the insulation layer.

[0042] In this embodiment, the airbag-rubber sealing tube inflation-type sealing structure can adapt to assembly tolerances. Even if there are processing deviations in the splicing gaps, the sealing effect can still be guaranteed by the expansion and deformation of the rubber sealing tube 301. The large and small plug-in structure enables rapid assembly. The hot-dip galvanizing + passivation double anti-corrosion, inflation double sealing, and suspension shock absorption multiple protections work together to make it suitable for harsh working conditions such as coastal areas and chemical plants with high humidity and salt spray.

[0043] Example 2:

[0044] This embodiment provides another optional implementation scheme, which differs from Embodiment 1 in that: the non-circular hole limiting structure of the bolt limiting hole 307 is removed, and a tool is used to clamp the head of the fixing bolt 305 during assembly to prevent rotation. The remaining plug-in structure, airbag inflation sealing structure, and hot-dip galvanized anti-corrosion structure are the same as in Embodiment 1.

[0045] Example 3:

[0046] This embodiment provides another optional implementation scheme, which differs from Embodiment 1 in that: a flame-retardant liner is pasted on the inner wall of the cable tray 1. The flame-retardant liner is a ceramicized silicone rubber flame-retardant liner. When the cables inside the cable tray overheat and catch fire, the liner can form a flame-retardant barrier, delaying the spread of fire along the cables inside the cable tray. The rest of the structure in this embodiment is the same as in Embodiment 1.

[0047] The flame-retardant liner can be either pasted or not, depending on the fire rating requirements of the project; when the project has no fire rating requirements, the flame-retardant liner can be omitted, further reducing product costs.

[0048] Working principle or structural principle: First, the first section of cable tray 1 is hoisted and fixed to the top plate by the suspension rod 2. Rubber shock-absorbing pads are added at the contact position between the suspension rod 2 and the cable tray 1 to weaken the transmission of building vibration to the inside of the cable tray and reduce the risk of cable damage from vibration and pulling.

[0049] Take another set of cable trays 1 to be spliced, insert its small splicing end 11 into the large access end 12 of the fixed cable tray, and complete the plug-in pre-assembly.

[0050] Insert the fixing bolt 305 so that the square flat end of the fixing bolt 305 is inserted into the square bolt limiting hole 307, and the bolt is prevented from rotating by the irregular hole; the fixing bolt 305 passes through the bolt limiting hole 307, the pressure plate 304, and the reserved through hole of the airbag 302 in sequence, and goes out from the reserved through hole of the access end 12. The matching lock nut is screwed into the threaded end of the fixing bolt 305.

[0051] During the connection operation of the two sets of cable trays 1, the same fixing bolt 305 can not only lock and fix the splicing between the two sets of cable trays 1, but also drive the sealing mechanism to complete the sealing operation of the splicing seam of the two sets of cable trays 1 through the locking operation, so that the connection and sealing are completed in one process, simplifying the on-site assembly process.

[0052] Subsequently, the cables are sequentially snapped into the cable limiting buckles inside the cable tray 1 to complete the cable arrangement limiting; then the cable tray cover plate 401 is closed to the upper opening of the cable tray 1, and the sealing gaskets 402 at both ends of the cable tray cover plate 401 are attached to the splicing position of the cable tray to achieve initial sealing at the joint of the cover plate.

[0053] By continuously tightening the locking nut, the nut pulls the fixing bolt 305 outward. The tail end of the fixing bolt 305 slides in the bolt limiting hole 307, causing the pressure plate 304 to slide inside the receiving groove 303. The pressure plate 304 compresses the airbag 302. After the airbag 302 is compressed, the internal gas enters the rubber sealing tube 301. The rubber sealing tube 301 inflates and expands, simultaneously filling the splicing gaps between adjacent cable trays 1 and the assembly gaps between cable tray 1 and cable tray cover plate 401. The rubber sealing tube 301 and the sealing gasket 402 cooperate with each other to form a double seal, making the inner cavity of the cable tray a sealed protective space, preventing moisture and dust from entering and protecting the internal cables.

[0054] When the cable needs to be inspected later, the locking nut is loosened in the reverse direction. The pressure plate 304 releases the pressure on the airbag 302. The airbag 302 rebounds due to its own rubber elasticity. The gas inside the rubber sealing tube 301 flows back and the rubber sealing tube 301 contracts to release the gap filling. At this time, the cable tray cover plate 401 can be lifted directly, or the two sections of the cable tray can be pulled apart to achieve disassembly. Disassembly and assembly are convenient.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0057] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A combined hot-dip galvanized cable tray with multiple protection features, characterized in that: Includes multiple cable trays (1), suspension rods (2), sealing mechanisms, and protective components; The suspension rod (2) is used to hoist the cable tray (1); adjacent sets of cable trays (1) are connected by insertion. The sealing mechanism includes an airbag (302), a pressure plate (304), a fixing bolt (305), and a rubber sealing tube (301); the pressure plate (304) can compress the airbag (302), and the airbag (302) is internally connected to the rubber sealing tube (301); the fixing bolt (305) is used to drive the pressure plate (304) to compress the airbag (302), so that the gas in the airbag (302) fills the rubber sealing tube (301), and the rubber sealing tube (301) inflates and fills the assembly gap; The protective component includes a cable tray cover (401) that covers the upper opening of the cable tray (1).

2. The combined hot-dip galvanized cable tray with multiple protections according to claim 1, characterized in that: Each cable tray (1) has a small-mouth splicing end (11) at one end and a large-mouth access end (12) at the other end; adjacent cable trays (1) are pre-positioned by inserting the splicing end (11) into the access end (12).

3. A combined hot-dip galvanized cable tray with multiple protections according to claim 2, characterized in that: The sealing mechanism is also provided with a receiving groove (303) and a bolt limiting hole (307); the receiving groove (303) is opened at the splicing end (11), the airbag (302) is arranged inside the receiving groove (303), and the pressure plate (304) is slidably assembled in the receiving groove (303) and abuts against the airbag (302); the bolt limiting hole (307) is opened at the splicing end (11).

4. A combined hot-dip galvanized cable tray with multiple protections as described in claim 3, characterized in that: The bolt limiting hole (307) is a non-circular hole. The tail end of the fixing bolt (305) is adapted to the bolt limiting hole (307) to restrict the circumferential rotation of the fixing bolt (305). The fixing bolt (305) passes through the bolt limiting hole (307), the pressure plate (304), and the reserved through hole of the airbag (302) in sequence, and comes out from the reserved through hole of the access end (12). The protruding end of the fixing bolt (305) is equipped with a locking nut.

5. A combined hot-dip galvanized cable tray with multiple protections as described in claim 1, characterized in that: A sealing groove (306) is provided at the junction of the cable tray (1) and the cable tray cover plate (401), and the rubber sealing tube (301) is installed inside the sealing groove (306).

6. A combined hot-dip galvanized cable tray with multiple protections according to claim 1, characterized in that: The protective assembly also includes a sealing gasket (402), and sealing gaskets (402) are provided at both ends of the cable tray cover plate (401); the sealing gasket (402) cooperates with the inflated rubber sealing tube (301) to achieve double sealing.

7. A combined hot-dip galvanized cable tray with multiple protections according to claim 1, characterized in that: The inner cavity of the cable tray (1) is provided with cable limiting buckles arranged in an array along the length direction. The cable limiting buckles are used to clamp, separate and fix the cables.

8. A combined hot-dip galvanized cable tray with multiple protections according to claim 1, characterized in that: The cable tray (1), suspension rod (2), and fixing bolts (305) are all hot-dip galvanized for corrosion protection.

9. A combined hot-dip galvanized cable tray with multiple protections according to claim 1, characterized in that: After the rubber sealing tube (301) is inflated, it simultaneously fills the splicing gap between adjacent cable trays (1) and the assembly gap between the cable tray (1) and the cable tray cover plate (401).

10. A combined hot-dip galvanized cable tray with multiple protections according to claim 4, characterized in that: Tightening the locking nut will pull the fixing bolt (305) to move, causing the pressure plate (304) to slide in the receiving groove (303) to compress the airbag (302) and squeeze out the gas inside the airbag.

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