High-strength composite fireproof bridge

Abstract

The utility model relates to the technical field of cable bridges, and discloses a high-strength composite fireproof bridge which comprises a plurality of bridge sections and cables which are connected through connecting plates, each bridge section comprises a groove frame and a top cover, fireproof paint is sprayed on the inner surface and the outer surface of each bridge section, a suspended supporting plate is arranged in each groove frame, and the section of each suspended supporting plate is in a U shape. A plurality of lightening holes are formed in the suspended supporting plate, a plurality of movable supporting legs are arranged on the lower side of the suspended supporting plate, one end of each movable supporting leg is connected to the bottom of the corresponding lightening hole, the other end of each movable supporting leg is connected to the inner wall of the groove frame, a gap exists between the groove frame and the suspended supporting plate, and a cable penetrates through a U-shaped groove of the suspended supporting plate; a wiring part is arranged in the middle of the connecting plate, a jumper wire is arranged on the inner side of the wiring part, and the adjacent bridge sections on the two sides are electrically connected together through the jumper wire. The high-strength composite fireproof bridge has the advantages that the internal cable is not easy to be heated and short-circuited, the structure is light, the installation is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of cable bridges, in particular to a high-strength composite fireproof bridge. Background Art

[0002] Fireproof bridge is a product composed of fireproof board composited with glass fiber reinforced material and inorganic adhesive, metal frame and other fireproof substrates. Fireproof bridge is suitable for the laying of power cables below 10KV, as well as control cables, lighting wiring and other indoor and outdoor overhead cable trenches and tunnels. As society pays attention to the occurrence of major natural fires, it is necessary to protect the fire protection circuit equipment to be able to be used normally for a period of time for fire fighting. The fire protection circuit equipment inside cannot be unusable immediately after a fire occurs in a building, causing huge losses to the society and the people due to the fire. Fireproof bridge was born in this context. After a fire occurs in the external environment, it can protect the cables in the fireproof bridge from being disturbed and affected, and it can also work normally for a period of time to ensure the normal development of fire fighting.

[0003] Jumper wires are used between two sections of a bridge to ensure the smooth flow of the circuit. Under normal circumstances, no current will pass through it. If a leakage occurs in the bridge, the current will flow into the earth through the grounding protection conductor connected to the jumper wire, thereby ensuring that there will be no accumulation of electricity on the bridge, avoiding leakage accidents and protecting personal safety.

[0004] The fireproof bridge in the prior art is usually composed of multiple bridge sections, each of which is composed of a trough frame and a top cover. Different bridge sections are connected by connecting plates and jumper wires, and cables are laid inside the trough frame.

[0005] By analyzing the existing technology, it is found that the fireproof bridge has the following disadvantages: the cables are attached to the inner wall of the trough. When a fire occurs, the temperature of the trough rises sharply, and the protective covers of the cables attached to the inner wall will melt, causing a short circuit between adjacent cables; the trough lacks ventilation devices, and directly setting ventilation holes on the trough requires adding flame-retardant nets, which increases the cost; the jumper wires are installed on the outside of the trough, and there is a lack of protection for the jumper wires, which affects the grounding of the bridge when a fire occurs. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the shortcomings of the prior art, the utility model provides a high-strength composite fireproof bridge frame, which has the advantages that the internal cables are not easily short-circuited due to heat, the structure is light, the installation is simple and the cost is low. It solves the problem that the cables are attached to the inner wall of the trough frame, causing thermal short-circuits, and the insulation layer is costly and heavy.

[0008] (II) Technical solution

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A high-strength composite fireproof bridge, comprising a plurality of bridge sections and cables passing through the bridge sections, adjacent bridge sections are connected by connecting plates, the bridge sections comprise a trough frame and a top cover, the inner and outer surfaces of the bridge sections are sprayed with fireproof spray paint, a suspended support plate is arranged in the trough frame, the cross section of the suspended support plate is U-shaped, a plurality of weight-reducing holes are arranged on the suspended support plate, a plurality of symmetrical movable support feet are arranged below the side of the suspended support plate, one end of each movable support foot is connected to the bottom of the weight-reducing hole, and the other end of the movable support foot is connected to the inner wall of the trough frame, there is a gap between the trough frame and the suspended support plate, the cable line passes through the U-shaped groove of the suspended support plate, and the suspended support plate is made of hard insulating material;

[0011] A wiring portion is arranged in the middle of the connection plate, a jumper wire is arranged inside the wiring portion, and the jumper wire electrically connects the adjacent bridge sections on both sides together.

[0012] Preferably, the wiring portion includes a protruding block protruding outward at a middle position and elastic pads fixed to both ends of the protrusion, the connection between the elastic pad and the wiring portion is elastic, a jumper wire is arranged on the inner side of the protrusion, both ends of the jumper wire are connected to the bottom of the two elastic pads by bolts, a wiring hole is arranged at the position of the slot frame corresponding to the elastic pad, and a claw pad is also arranged between the wiring hole and the jumper wire.

[0013] Preferably, one end of each movable support foot is rotatably connected to the suspended support plate, and the other end of the movable support foot is attached to the inner wall of the suspended support plate. The movably connected movable support feet facilitate the installation of the suspended support plate on the inner walls of trough frames of different sizes.

[0014] Preferably, an arc-shaped top plate is provided at the bottom of the top cover, a cavity serving as a ventilation passage is provided between the top cover and the arc-shaped top plate, vents are provided on the arc-shaped top plate, a top plate front end and a top plate rear end are provided at both ends of the arc-shaped top plate respectively, the arc-shaped top plate between two adjacent bridge frame sections is connected by the top plate front end and the top plate rear end, and the top plate front ends and the top plate rear ends of two adjacent arc-shaped top plates are connected together by means of socketing.

[0015] Preferably, both ends of the arc-shaped top plate are connected to an exhaust device, and the exhaust device is provided with a temperature sensor in the bridge section. When the temperature in the bridge section exceeds a preset value, the exhaust device introduces high-speed airflow into the arc-shaped top plate.

[0016] Preferably, at least two connecting plate fixing holes are respectively provided at both ends of the connecting plate, and the slot frame is provided with slot frame fixing holes at positions corresponding to the connecting plate fixing holes, and the slot frame fixing holes and the corresponding connecting plate fixing holes are fixed by bolts.

[0017] Preferably, the cross-section of the connecting plate is L-shaped, the long side of the connecting plate is installed on the side of the slot frame, the short side of the connecting plate is installed on the bottom of the slot frame, and the wiring part and the connecting plate fixing hole are both installed on the long side of the connecting plate.

[0018] Preferably, the suspended support plate is a ceramic fiberboard, which has the effects of high temperature resistance, light weight and insulation.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the utility model provides a high-strength composite fireproof bridge frame, which has the following beneficial effects:

[0021] 1. The high-strength composite fireproof bridge is provided with a suspended support plate that has no direct contact with the trough frame, and movable support feet are provided under the suspended support plate to make the suspended support plate suspended inside the trough frame. The cable passes through the U-shaped groove of the suspended support plate, so that when a fire occurs, the heat of the trough frame cannot be directly transferred to the cable line, thereby avoiding the cable line being attached to the trough frame and being melted by heat, resulting in a short circuit.

[0022] 2. The high-strength composite fireproof bridge has jumper wires arranged on the inner side of the wiring part in the middle of the connecting plate. Compared with the jumper wires exposed to the outside in the prior art, the jumper wires protected on the inner side of the connecting plate are safer and will not be directly exposed to the outside when a fire occurs. Since the cables are more likely to short-circuit and make the bridge section electrified during a fire, the jumper wires are used to electrically connect the bridge sections together and ground them to prevent electric shock in the event of a fire short-circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model in which two bridge frame sections are connected together through a connecting plate.

[0024] Figure 2 It is a structural schematic diagram of a bridge section in the high-strength composite fireproof bridge of the utility model.

[0025] Figure 3 It is a front view of a bridge section in the high-strength composite fireproof bridge of the utility model.

[0026] Figure 4 This is an exploded view of a bridge section in the high-strength composite fireproof bridge of the utility model.

[0027] Figure 5 The utility model is a schematic diagram of the structure of a slot frame in the high-strength composite fireproof bridge.

[0028] Figure 6 The utility model is a schematic diagram of the structure of a suspended support plate in the high-strength composite fireproof bridge.

[0029] Figure 7The utility model is a schematic structural diagram of a top cover with an arc-shaped top plate installed in the high-strength composite fireproof bridge.

[0030] Figure 8 It is a structural schematic diagram of the bridge section in the second embodiment of the utility model.

[0031] Fig. 9 The utility model is a structural schematic diagram of a connecting plate in the high-strength composite fireproof bridge.

[0032] Fig.10 This is an internal cross-sectional view of the utility model when the connecting plates are connected.

[0033] In the figure: 100, bridge section; 110, trough frame; 120, top cover; 130, suspended support plate; 140, curved top plate; 111, trough frame fixing hole; 112, wiring hole; 131, weight reduction hole; 132, movable support foot; 133, fixed support foot; 141, vent hole; 142, front end of top plate; 143, rear end of top plate;

[0034] 200, connecting plate; 210, wiring portion; 220, connecting plate fixing hole; 211, bump; 212, elastic pad; 213, jumper wire; 214, claw pad;

[0035] 300. Cable. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] Embodiment 1:

[0040] This embodiment provides a high-strength composite fireproof bridge frame having the following technical features.

[0041] See also Figure 1-10 A high-strength composite fireproof bridge comprises a plurality of bridge sections 100 and cables 300 passing through the bridge sections 100. Adjacent bridge sections 100 are connected by connecting plates 200. The bridge sections 100 comprise a trough frame 110 and a top cover 120. The inner and outer surfaces of the bridge sections 100 are sprayed with fireproof spray paint. A suspended support plate 130 is arranged in the trough frame 110. The suspended support plate 130 has a U-shaped cross section. A plurality of weight-reducing holes 131 are arranged on the suspended support plate 130. A plurality of symmetrical movable supports are arranged at the lower side of the suspended support plate 130. Support legs 132, one end of each movable support leg 132 is rotatably connected to the bottom of the weight-reducing hole 131, and the other end of the movable support leg 132 is attached to the inner wall of the trough frame 110. There is a gap between the trough frame 110 and the suspended support plate 130. The cable 300 passes through the U-shaped groove of the suspended support plate 130. The suspended support plate 130 is made of hard insulating material. A wiring portion 210 is provided in the middle position of the connecting plate 200, and a jumper wire 213 is provided on the inner side of the wiring portion 210. The jumper wire 213 electrically connects the adjacent bridge frame sections 100 on both sides together.

[0042] According to the above technical solution, the high-strength composite fireproof bridge is provided with a suspended support plate 130 that has no direct contact with the trough frame 110, and a movable support foot 132 is provided under the suspended support plate 130 so that the suspended support plate 130 is suspended inside the trough frame 110, and the cable 300 passes through the U-shaped groove of the suspended support plate 130, so that when a fire occurs, the heat of the trough frame 110 cannot be directly transferred to the cable 300, thereby preventing the cable 300 from sticking to the trough frame 110 and melting due to heat, resulting in a short circuit. Different from the use of a large number of insulation layers, the suspended support plate 130 has a simple structure, light weight and low cost.

[0043] According to the above technical solution, the high-strength composite fireproof bridge frame, by arranging the jumper wire 213 on the inner side of the wiring portion 210 in the middle position of the connecting plate 200, is compared with the jumper wire 213 exposed to the outside in the prior art. The jumper wire 213 protected on the inner side of the connecting plate 200 is safer and will not be directly exposed to the outside when a fire occurs. Since the cable 300 is more likely to short-circuit and make the bridge frame section 100 energized during a fire, the jumper wire 213 is used to electrically connect the bridge frame sections 100 together and ground them to prevent electric shock in the event of a fire short-circuit.

[0044] In an optional embodiment, the wiring portion 210 includes a protrusion 211 protruding outward from a middle position and elastic pads 212 fixed to both ends of the protrusion 211. The connection between the elastic pad 212 and the wiring portion 210 is elastic. A jumper wire 213 is arranged on the inner side of the protrusion 211. Both ends of the jumper wire 213 are connected to the bottom of the two elastic pads 212 by bolts. A wiring hole 112 is arranged at the position of the slot frame 110 corresponding to the elastic pad 212, and a claw pad 214 is also arranged between the wiring hole 112 and the jumper wire 213.

[0045] It should be noted that the claw pad 214 is used to break the paint sprayed on the surface of the slot frame 110 when it is rotated and squeezed by the bolt, so that the slot frame 110, the claw pad 214 and the jumper wire 213 are electrically connected.

[0046] In an optional embodiment, one end of each movable support foot 132 is rotatably connected to the suspended support plate 130, and the other end of the movable support foot 132 is attached to the inner wall of the suspended support plate 130. The movably connected movable support feet 132 facilitate the installation of the suspended support plate 130 on the inner wall of the trough frame 110 of different sizes.

[0047] In an optional embodiment, an arc-shaped top plate 140 is provided at the bottom of the top cover 120, and a cavity serving as a ventilation passage is provided between the top cover 120 and the arc-shaped top plate 140. A vent 141 is provided on the arc-shaped top plate 140, and a top plate front end 142 and a top plate rear end 143 are provided at both ends of the arc-shaped top plate 140 respectively. The arc-shaped top plate 140 between two adjacent bridge frame sections 100 is connected through the top plate front end 142 and the top plate rear end 143, and the top plate front end 142 and the top plate rear end 143 of two adjacent arc-shaped top plates 140 are connected together by means of a socket connection.

[0048] It is further provided that both ends of the arc-shaped top plate 140 are connected to an exhaust device, and the exhaust device is provided with a temperature sensor in the bridge section 100 , and the exhaust device introduces a high-speed airflow into the arc-shaped top plate 140 when the temperature in the bridge section 100 exceeds a preset value.

[0049] According to the above technical solution, the high-strength composite fireproof bridge is provided with a curved top plate 140 below the top cover 120, and the high-temperature gas in the bridge section 100 is discharged through the cavity in the curved top plate 140, and then a high-speed airflow is introduced into the curved top plate 140 to cool the bridge section 100.

[0050] In an optional embodiment, at least two connecting plate fixing holes 220 are respectively provided at both ends of the connecting plate 200, and the slot frame 110 is provided with a slot frame fixing hole 111 at the position corresponding to the connecting plate fixing hole 220, and the slot frame fixing hole 111 and the corresponding connecting plate fixing hole 220 are fixed by bolts.

[0051] It is further configured that the cross-section of the connecting plate 200 is L-shaped, the long side of the connecting plate 200 is installed on the side of the slot frame 110, the short side of the connecting plate 200 is installed on the bottom surface of the slot frame 110, and the wiring part 210 and the connecting plate fixing hole 220 are both installed on the long side of the connecting plate 200.

[0052] In an optional embodiment, the suspended support plate 130 is a ceramic fiberboard, which has high temperature resistance, light weight and insulation effects.

[0053] Embodiment 2:

[0054] This embodiment provides a high-strength composite fireproof bridge frame, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0055] like Figure 8 As shown, a high-strength composite fireproof bridge comprises a plurality of bridge sections 100 and cables 300 passing through the bridge sections 100. Adjacent bridge sections 100 are connected by connecting plates 200. The bridge sections 100 comprise a trough frame 110 and a top cover 120. The inner and outer surfaces of the bridge sections 100 are sprayed with fireproof paint. A suspended support plate 130 is arranged in the trough frame 110. The suspended support plate 130 has a U-shaped cross section. A plurality of weight-reducing holes 131 are arranged on the suspended support plate 130. A plurality of symmetrical fixed supports are arranged at the lower side of the suspended support plate 130. Support legs 133, one end of each fixed support leg 133 is fixedly connected to the bottom of the weight-reducing hole 131, and the other end of the fixed support leg 133 is installed on the inner wall of the slot frame 110 by bolts. There is a gap between the slot frame 110 and the suspended support plate 130. The cable 300 passes through the U-shaped groove of the suspended support plate 130. The suspended support plate 130 is made of hard insulating material. A wiring part 210 is provided in the middle position of the connecting plate 200, and a jumper wire 213 is provided on the inner side of the wiring part 210. The jumper wire 213 electrically connects the adjacent bridge frame sections 100 on both sides together.

[0056] Working principle: During installation, first arrange the cables 300, and at the same time install the curved top plate 140 at the bottom of the top cover 120, and install the suspended support plate 130 inside the trough frame 110; then install the trough frame 110 and the suspended support plate 130 at the bottom of the cables 300, and support the cables 300 away from the trough frame 110 through the suspended support plate 130; then use the connecting plate 200 to connect the trough frames 110 together, first install the connecting plate 200 and then install the top cover 120; finally, install the top cover 120 and the curved top plate 140 on the top of the trough frame 110, and connect the adjacent curved top plates 140 together through the front end 142 and the rear end 143 of the top plate.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength composite fireproof bridge, comprising a plurality of bridge sections (100) and cables (300) passing through the bridge sections (100), wherein adjacent bridge sections (100) are connected by connecting plates (200), the bridge sections (100) comprising trough frames (110) and top covers (120), and the inner and outer surfaces of the bridge sections (100) are sprayed with fireproof paint, characterized in that: A suspended support plate (130) is arranged in the trough frame (110), the cross section of the suspended support plate (130) is U-shaped, a plurality of weight-reducing holes (131) are arranged on the suspended support plate (130), a plurality of symmetrical movable support feet (132) are arranged at the lower side of the suspended support plate (130), one end of each movable support foot (132) is connected to the bottom of the weight-reducing hole (131), and the other end of the movable support foot (132) is connected to the inner wall of the trough frame (110), there is a gap between the trough frame (110) and the suspended support plate (130), the cable (300) passes through the U-shaped groove of the suspended support plate (130), and the suspended support plate (130) is made of hard insulating material; A wiring portion (210) is provided in the middle of the connection plate (200), a jumper wire (213) is provided inside the wiring portion (210), and the jumper wire (213) electrically connects the adjacent bridge sections (100) on both sides.

2. A high-strength composite fireproof bridge according to claim 1, characterized in that: The wiring portion (210) comprises a protruding block (211) protruding outward at a middle position and elastic pads (212) fixedly connected to both ends of the protruding block (211); the connection between the elastic pad (212) and the wiring portion (210) is elastic; a jumper wire (213) is arranged inside the protruding block (211); both ends of the jumper wire (213) are connected to the bottom of two elastic pads (212) by bolts; a wiring hole (112) is arranged on the slot frame (110) at a position corresponding to the elastic pad (212); and a claw pad (214) is also arranged between the wiring hole (112) and the jumper wire (213).

3. A high-strength composite fireproof bridge according to claim 1, characterized in that: One end of each movable support foot (132) is rotatably connected to the suspended support plate (130), and the other end of the movable support foot (132) is attached to the inner wall of the suspended support plate (130). The movably connected movable support feet (132) facilitate the installation of the suspended support plate (130) on the inner walls of slot frames (110) of different sizes.

4. A high-strength composite fireproof bridge according to claim 1, characterized in that: An arc-shaped top plate (140) is arranged at the bottom of the top cover (120); a cavity serving as a ventilation passage is arranged between the top cover (120) and the arc-shaped top plate (140); a vent hole (141) is arranged on the arc-shaped top plate (140); a top plate front end (142) and a top plate rear end (143) are arranged at two ends of the arc-shaped top plate (140); the arc-shaped top plates (140) between two adjacent bridge frame sections (100) are connected via the top plate front end (142) and the top plate rear end (143); and the top plate front ends (142) and the top plate rear ends (143) of two adjacent arc-shaped top plates (140) are connected together via a socket connection.

5. A high-strength composite fireproof bridge according to claim 4, characterized in that: Both ends of the arc-shaped top plate (140) are connected to an exhaust device, and the exhaust device is provided with a temperature sensor arranged in the bridge section (100).

6. The high-strength composite fireproof bridge according to claim 1, characterized in that: At least two connecting plate fixing holes (220) are respectively arranged at both ends of the connecting plate (200); the slot frame (110) is provided with a slot frame fixing hole (111) at a position corresponding to the connecting plate fixing hole (220); the slot frame fixing hole (111) and the corresponding connecting plate fixing hole (220) are fixed by bolts.

7. A high-strength composite fireproof bridge according to claim 6, characterized in that: The cross section of the connecting plate (200) is L-shaped, the long side of the connecting plate (200) is installed on the side of the slot frame (110), the short side of the connecting plate (200) is installed on the bottom surface of the slot frame (110), and the wiring portion (210) and the connecting plate fixing hole (220) are both installed on the long side of the connecting plate (200).

8. The high-strength composite fireproof bridge according to claim 1, characterized in that: The suspended support plate (130) is a ceramic fiberboard.

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