Composite flame-retardant bridge

Abstract

The utility model provides a composite flame-retardant bridge, and relates to the technical field of cable bridges. The composite flame-retardant bridge comprises a steel skeleton, a flame-retardant mixed layer and a fiber reinforced layer. Wherein the middle portion of the steel framework is of a net-shaped structure, the outer surface of the steel framework is coated with the flame-retardant mixing layer, the flame-retardant mixing layer penetrates through the steel framework through the net-shaped structure, and the outer surface of the flame-retardant mixing layer is coated with the fiber reinforcement layer. By arranging the flame-retardant mixing layer, the flame-retardant performance and the fireproof performance of the composite flame-retardant bridge can be improved. And the middle part of the steel skeleton is arranged to be of a net-shaped structure, so that the use amount of steel is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of cable tray technology, and more specifically, to a composite flame-retardant cable tray. Background Technology

[0002] As electricity demand continues to rise across various industries, the use of cable trays as a critical infrastructure is also increasing year by year. Cable trays are a structural system used to support and protect cables, and are widely used in industries such as power, telecommunications, and construction.

[0003] Traditional cable trays require a large amount of steel to manufacture, which not only increases production costs but also makes them prone to corrosion during use due to improper protection or harsh environments, thus affecting their load-bearing capacity and service life. In short, existing cable trays suffer from high production costs, low corrosion resistance, and poor fire resistance.

[0004] Therefore, how to develop a low-cost, high-performance cable tray is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a low-cost, high-performance composite flame-retardant cable tray.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] This application provides a composite flame-retardant cable tray, which includes a steel frame, a flame-retardant composite layer, and a fiber reinforcement layer;

[0008] The middle part of the steel frame has a mesh structure, the flame-retardant composite layer covers the outer surface of the steel frame, and the flame-retardant composite layer penetrates the steel frame through the mesh structure. The fiber reinforcement layer covers the outer surface of the flame-retardant composite layer.

[0009] Furthermore, the composite flame-retardant cable tray also includes a first connecting part, a middle part, and a second connecting part; one end of the middle part along the length direction is connected to the first connecting part, and the other end of the middle part along the length direction is connected to the second connecting part;

[0010] The first connecting part is a male plug structure, and the second connecting part is a female plug structure that matches the male plug structure.

[0011] Furthermore, the first connecting part is provided with a first mounting hole, and the second connecting part is provided with a second mounting hole, the number of the first mounting holes being the same as the number of the second mounting holes.

[0012] Furthermore, the steel frame includes a base plate, a first side wall, and a second side wall; the lengths of the first side wall and the second side wall are both the same as the length of the base plate;

[0013] The first sidewall is perpendicularly connected to one end of the base plate along the width direction, and the second sidewall is perpendicularly connected to the other end of the base plate along the width direction.

[0014] Furthermore, the composite flame-retardant cable tray also includes a first threaded steel bar and a second threaded steel bar, wherein the first threaded steel bar has the same length as the first sidewall, and the second threaded steel bar has the same length as the second sidewall;

[0015] The first threaded steel bar is connected to the end of the first sidewall away from the base plate, and the second threaded steel bar is connected to the end of the second sidewall away from the base plate.

[0016] Furthermore, the composite flame-retardant cable tray also includes a cover plate, which includes a top plate, a first clamping member, and a second clamping member, the lengths of which are the same as the length of the top plate;

[0017] One end of the top plate along the width direction is vertically connected to a first clamping member that clamps the first threaded steel bar, and the other end of the top plate along the width direction is vertically connected to a second clamping member that clamps the second threaded steel bar.

[0018] Furthermore, the middle portions of the base plate, the first sidewall, and the second sidewall are all mesh structures.

[0019] Furthermore, the mesh structure is a rhomboid mesh structure.

[0020] Furthermore, the thickness of the steel frame is 0.5 to 0.8 mm.

[0021] Furthermore, the material of the flame-retardant composite layer includes straw.

[0022] Compared with the prior art, this application has the following advantages:

[0023] This application provides a composite flame-retardant cable tray, comprising a steel frame, a flame-retardant composite layer, and a fiber reinforcement layer. The steel frame has a mesh structure in its middle section. The flame-retardant composite layer covers the outer surface of the steel frame and penetrates the steel frame through the mesh structure. The fiber reinforcement layer covers the outer surface of the flame-retardant composite layer. The flame-retardant composite layer improves the flame-retardant and fire-resistant properties of the composite flame-retardant cable tray. Setting the middle section of the steel frame as a mesh structure not only reduces the overall weight of the composite flame-retardant cable tray but also reduces the amount of steel used, thereby lowering production costs. Furthermore, the mesh structure in the steel frame facilitates the bonding of the upper and lower flame-retardant composite layers; that is, the flame-retardant composite layer not only covers the outer surface of the steel frame but also penetrates the steel frame through the mesh structure, further improving the flame-retardant and fire-resistant properties of the composite flame-retardant cable tray.

[0024] In addition, by setting a fiber reinforcement layer on the outer surface of the flame-retardant composite layer, the structural strength of the overall surface of the composite flame-retardant cable tray can be strengthened, thereby improving the load-bearing capacity and service life of the composite flame-retardant cable tray. Attached Figure Description

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] Figure 1 One of the cross-sectional schematic diagrams of a composite flame-retardant cable tray provided in the embodiments of this application;

[0027] Figure 2 This is a structural schematic diagram of a composite flame-retardant cable tray provided in an embodiment of this application;

[0028] Figure 3 A schematic diagram illustrating the process of connecting the first composite flame-retardant cable tray and the second composite flame-retardant cable tray in an embodiment of this application;

[0029] Figure 4 This application provides a schematic diagram of a steel frame structure.

[0030] Figure 5A top view of a steel frame provided in an embodiment of this application;

[0031] Figure 6 A cross-sectional schematic diagram of a steel frame provided for an embodiment of this application;

[0032] Figure 7 A second cross-sectional schematic diagram of a composite flame-retardant cable tray provided for an embodiment of this application;

[0033] Figure 8 This is a schematic diagram illustrating the process of preparing a composite flame-retardant cable tray, as provided in an embodiment of this application.

[0034] Icons: 10-Composite flame-retardant cable tray; 100-Steel frame; 110-Base plate; 120-First side wall; 130-Second side wall; 200-Flame-retardant mixed layer; 300-Fiber reinforced layer; 400-First connecting part; 410-First mounting hole; 500-Middle part; 600-Second connecting part; 610-Second mounting hole; 710-First threaded steel bar; 720-Second threaded steel bar; 910-Top plate; 920-First clamping component; 930-Second clamping component; 20-Heating device; 30-Lower mold; 40-Upper mold. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that 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. The term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] As mentioned in the background section, traditional cable trays require a large amount of steel to manufacture, which not only increases production costs but also makes them prone to corrosion during use due to improper protection or harsh environments, thus affecting their load-bearing capacity and service life. In other words, existing cable trays suffer from high production costs, low corrosion resistance, and poor fire resistance.

[0039] In view of this, please refer to Figure 1 , Figure 1 This is a cross-sectional schematic diagram of a composite flame-retardant cable tray 10 provided in an embodiment of this application. In this embodiment, the composite flame-retardant cable tray 10 includes: a steel frame 100, a flame-retardant composite layer 200, and a fiber reinforcement layer 300.

[0040] The middle part of the steel frame 100 is a mesh structure, the flame-retardant mixed layer 200 is covered on the outer surface of the steel frame 100, and the flame-retardant mixed layer 200 penetrates the steel frame 100 through the mesh structure. The fiber reinforcement layer 300 is covered on the outer surface of the flame-retardant mixed layer 200.

[0041] The steel frame 100 serves as a supporting framework, ensuring the strength of the composite flame-retardant cable tray 10. The flame-retardant hybrid layer 200 enhances the flame-retardant and fire-resistant properties of the composite flame-retardant cable tray 10. By designing the middle section of the steel frame 100 as a mesh structure, not only is the overall weight of the composite flame-retardant cable tray 10 reduced, but the amount of steel used is also decreased, thereby lowering production costs. Furthermore, the mesh structure in the steel frame 100 facilitates the bonding of the upper and lower flame-retardant hybrid layers 200; that is, the flame-retardant hybrid layer 200 not only covers the outer surface of the steel frame 100 but also penetrates through the mesh structure, further improving the flame-retardant and fire-resistant properties of the composite flame-retardant cable tray 10.

[0042] In addition, by providing a fiber reinforcement layer 300 on the outer surface of the flame-retardant composite layer 200, the structural strength of the overall surface of the composite flame-retardant cable tray 10 can be strengthened, thereby improving the load-bearing capacity and service life of the composite flame-retardant cable tray 10.

[0043] Optionally, the fiber reinforcement layer 300 can be a glass fiber mesh.

[0044] Furthermore, in practical applications, multiple cable trays need to be connected end-to-end using multiple docking devices to extend the overall length of the cable tray. To facilitate the connection between multiple cable trays, in one optional implementation, please refer to... Figure 2 The composite flame-retardant cable tray 10 also includes a first connecting part 400, a middle part 500, and a second connecting part 600.

[0045] The middle part 500 is connected to the first connecting part 400 at one end along its length (i.e., the length of the composite flame-retardant cable tray 10), and the middle part 500 is connected to the second connecting part 600 at the other end along its length. Furthermore, the first connecting part 400 is a male connector, and the second connecting part 600 is a female connector that matches the male connector.

[0046] For a better understanding, please refer to Figure 3 , Figure 3 The diagram illustrates the connection process between the first connecting portion 400 of the first composite flame-retardant cable tray A and the second connecting portion 600 of the second composite flame-retardant cable tray B. It can be seen that the first connecting portion 400 of the first composite flame-retardant cable tray A is a male-to-female connector, while the second connecting portion 600 of the second composite flame-retardant cable tray B is a female-to-female connector. This application employs a male-to-female mating interlocking structure design, allowing direct end-to-end connection of the two cable trays without the need for a separate docking device, thus simplifying assembly.

[0047] In addition, in order to further improve the connection stability between the two cable trays, in this embodiment of the application, the first connecting part 400 is provided with a first mounting hole 410, and the second connecting part 600 is provided with a second mounting hole 610, and the number of the first mounting holes 410 is the same as the number of the second mounting holes 610.

[0048] like Figure 3 As shown, the first connecting part 400 of the first composite flame-retardant cable tray A has six first mounting holes 410, and the second connecting part 600 of the second composite flame-retardant cable tray B also has six second mounting holes 610. After the first connecting part 400 of the first composite flame-retardant cable tray A and the second connecting part 600 of the second composite flame-retardant cable tray B are fitted together, the positions of the first mounting holes 410 and the second mounting holes 610 correspond, and screws can be inserted for further fixation.

[0049] Furthermore, the structural schematic diagram of the steel frame 100 is as follows: Figure 4 As shown in this embodiment, the steel frame 100 includes a base plate 110, a first side wall 120, and a second side wall 130. The lengths of both the first side wall 120 and the second side wall 130 are the same as the length of the base plate 110. The first side wall 120 is vertically connected to one end of the base plate 110 along its width direction (i.e., the width direction of the composite flame-retardant cable tray 10), and the second side wall 130 is vertically connected to the other end of the base plate 110 along its width direction, thus forming a groove structure.

[0050] Optionally, the middle part of the base plate 110, the first side wall 120 and the second side wall 130 are all mesh structures, which can be diamond mesh structures.

[0051] In this embodiment, the thickness of the steel frame 100 is 0.5–0.8 mm. That is, the steel frame 100 is made of thin steel strip, and the middle part of the steel frame 100 is formed into a diamond mesh structure by staggered shearing, which greatly reduces the amount of steel used and lowers the cost.

[0052] As an optional implementation, please refer to Figure 5 and Figure 6 The composite flame-retardant cable tray 10 also includes a first threaded steel bar 710 and a second threaded steel bar 720. The first threaded steel bar 710 has the same length as the first side wall 120, and the second threaded steel bar 720 has the same length as the second side wall 130.

[0053] The first sidewall 120 is connected to a first threaded steel bar 710 at the end away from the base plate 110, and the second sidewall 130 is connected to a second threaded steel bar 720 at the end away from the base plate 110.

[0054] Optionally, the diameter of both the first threaded steel bar 710 and the second threaded steel bar 720 is 3mm.

[0055] In one alternative implementation, please refer to Figure 7 The composite flame-retardant cable tray 10 also includes a cover plate. The cover plate includes a top plate 910, a first retaining member 920, and a second retaining member 930.

[0056] The lengths of the first clamping member 920 and the second clamping member 930 are the same as the length of the top plate 910. One end of the top plate 910 along the width direction is vertically connected to the first clamping member 920, which clamps the first threaded steel bar 710, and the other end of the top plate 910 along the width direction is vertically connected to the second clamping member 930, which clamps the second threaded steel bar 720.

[0057] Based on the above design, by welding the first threaded steel bar 710 and the second threaded steel bar 720 to the edges of the first side wall 120 and the second side wall 130 respectively, the overall edge strength of the steel frame 100 can be enhanced. At the same time, a retaining structure can be provided in the later installation of the cover plate to facilitate the installation of the cover plate.

[0058] Furthermore, in this embodiment, the flame-retardant composite layer 200 is made of straw. Certain components in straw (such as lignin and cellulose) possess natural flame-retardant properties, which can improve the fire resistance of the cable tray. Moreover, the flame-retardant composite layer 200 made from straw is lower in cost and more environmentally friendly.

[0059] To further improve the performance of the composite flame-retardant cable tray 10, in an optional embodiment, the composition and weight ratio of the flame-retardant mixed layer 200 are as follows: 50-60% straw, 10-20% magnesium oxide, 5-10% magnesium chloride, 20-35% polymer, 5-10% polymer curing agent, 1-3% ultraviolet absorber, and 0.2-0.5% modifier.

[0060] The preparation method of flame-retardant composite layer 200 is as follows: weigh an appropriate amount of straw, magnesium oxide and magnesium chloride, mix them evenly, add polymer and stir into a thinner, weigh an appropriate amount of polymer curing agent and stir it evenly, and then add a certain amount of modifier and ultraviolet absorber.

[0061] Among them, magnesium oxide and magnesium chloride can improve the fire resistance of cable trays. Modifiers and ultraviolet absorbers can improve the performance of the flame-retardant composite layer 200, enhance its UV resistance and plasticity, thereby increasing the outdoor service life of the cable trays.

[0062] Further, please refer to Figure 8 , Figure 8 The preparation process of the composite flame-retardant cable tray 10 provided in this application embodiment is shown. The cable tray forming mold is heated to 60°C by heating device 20. Then, fiber reinforcement layer 300 and steel frame 100 are placed in the lower mold 30 in sequence, and the prepared mixture is poured in. Then, a layer of fiber reinforcement layer 300 is covered. Finally, the upper mold 40 is closed and the mold temperature is heated to 90°C (water bath constant temperature heating can be used) and maintained for 30 minutes. After the mold is opened, the composite flame-retardant cable tray 10 is taken out and trimmed after cooling.

[0063] The composite flame-retardant cable tray 10 is formed using a thermosetting process. The mixture is not easy to cure at room temperature. The curing time of the mixture can be reduced by increasing the temperature, so that the mixture can eventually be cured into a flame-retardant composite layer 200.

[0064] In summary, this application provides a composite flame-retardant cable tray, comprising a steel frame, a flame-retardant composite layer, and a fiber reinforcement layer. The middle section of the steel frame has a mesh structure, the flame-retardant composite layer covers the outer surface of the steel frame and penetrates the steel frame through the mesh structure, and the fiber reinforcement layer covers the outer surface of the flame-retardant composite layer. The flame-retardant composite layer improves the flame-retardant and fire-resistant performance of the composite flame-retardant cable tray. Setting the middle section of the steel frame as a mesh structure not only reduces the overall weight of the composite flame-retardant cable tray but also reduces the amount of steel used, thereby lowering production costs. Furthermore, the mesh structure in the steel frame facilitates the bonding of the upper and lower flame-retardant composite layers; that is, the flame-retardant composite layer not only covers the outer surface of the steel frame but also penetrates the steel frame through the mesh structure, further improving the flame-retardant and fire-resistant performance of the composite flame-retardant cable tray.

[0065] In addition, by setting a fiber reinforcement layer on the outer surface of the flame-retardant composite layer, the structural strength of the overall surface of the composite flame-retardant cable tray can be strengthened, thereby improving the load-bearing capacity and service life of the composite flame-retardant cable tray.

[0066] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0067] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A composite flame-retardant cable tray, characterized in that, The composite flame-retardant cable tray includes a steel frame, a flame-retardant composite layer, and a fiber reinforcement layer; The middle part of the steel frame has a mesh structure, the flame-retardant composite layer covers the outer surface of the steel frame, and the flame-retardant composite layer penetrates the steel frame through the mesh structure. The fiber reinforcement layer covers the outer surface of the flame-retardant composite layer.

2. The composite flame-retardant cable tray according to claim 1, characterized in that, The composite flame-retardant cable tray further includes a first connecting part, a middle part, and a second connecting part; one end of the middle part along the length direction is connected to the first connecting part, and the other end of the middle part along the length direction is connected to the second connecting part; The first connecting part is a male plug structure, and the second connecting part is a female plug structure that matches the male plug structure.

3. The composite flame-retardant cable tray according to claim 2, characterized in that, The first connecting part has a first mounting hole, and the second connecting part has a second mounting hole. The number of the first mounting holes is the same as the number of the second mounting holes.

4. The composite flame-retardant cable tray according to claim 1, characterized in that, The steel frame includes a base plate, a first side wall, and a second side wall; the lengths of the first side wall and the second side wall are the same as the length of the base plate. The first sidewall is perpendicularly connected to one end of the base plate along the width direction, and the second sidewall is perpendicularly connected to the other end of the base plate along the width direction.

5. The composite flame-retardant cable tray according to claim 4, characterized in that, The composite flame-retardant cable tray also includes a first threaded steel bar and a second threaded steel bar, wherein the first threaded steel bar has the same length as the first sidewall and the second threaded steel bar has the same length as the second sidewall; The first threaded steel bar is connected to the end of the first sidewall away from the base plate, and the second threaded steel bar is connected to the end of the second sidewall away from the base plate.

6. The composite flame-retardant cable tray according to claim 5, characterized in that, The composite flame-retardant cable tray also includes a cover plate, which includes a top plate, a first clamping member, and a second clamping member. The lengths of the first clamping member and the second clamping member are the same as the length of the top plate. One end of the top plate along the width direction is vertically connected to a first clamping member that clamps the first threaded steel bar, and the other end of the top plate along the width direction is vertically connected to a second clamping member that clamps the second threaded steel bar.

7. The composite flame-retardant cable tray according to claim 4, characterized in that, The middle portion of the base plate, the first sidewall, and the second sidewall are all mesh structures.

8. The composite flame-retardant cable tray according to claim 1, characterized in that, The mesh structure is a rhomboid mesh structure.

9. The composite flame-retardant cable tray according to claim 1, characterized in that, The thickness of the steel frame is 0.5 to 0.8 mm.

10. The composite flame-retardant cable tray according to claim 1, characterized in that, The flame-retardant composite layer is made of straw.

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