High-temperature-resistant fire-fighting cable protection bridge

Abstract

The utility model relates to the field of cable installation, in particular to a fire-fighting cable protection bridge capable of resisting high temperature, which comprises a protection frame. A first water cooling box is fixedly connected to the right side of the protection frame, a second water cooling box is fixedly connected to the left side of the protection frame, and a liquid nitrogen conveying pipe is fixedly connected to the upper end of the protection frame. According to the utility model, the water supply end of the tap water pipeline in the tap water pipe network is connected to the tap water injection pipe, and the tap water outlet pipe is connected in the pressure-free pipeline of the tap water pipeline in the tap water pipe network, so that the water flow is unidirectionally circulated; tap water flows into the first water cooling box through the first connecting pipe, then flows into the second water cooling box from the U-shaped pipes and then flows into the pressure-free tap water pipeline from the second connecting pipe and the tap water outlet pipe, and heat on the first water cooling box and the second water cooling box can be taken away through continuous water delivery of the tap water. And efficient heat dissipation of the protection frame is realized.

Description

Technical Field

[0001] The utility model belongs to the field of cable installation, and in particular relates to a high-temperature resistant fire-fighting cable protection bridge. Background Art

[0002] With the rapid development of social economy and the acceleration of urbanization, various types of buildings and facilities are increasing, and with them comes an increase in fire hazards. Firefighting plays a vital role in safeguarding people’s lives and property and ensuring social stability. However, traditional fire-fighting cables and cable trays have many safety hazards in high temperature environments, such as flammability and breakage of cables and cable trays.

[0003] Fire-fighting cables in the prior art usually have multiple layers of refractory materials wrapped around the outer skin of ordinary cables to protect the cables. The refractory materials are coated on the cable tray to improve the high temperature resistance of the cable tray. However, when the cable protection tray in the prior art encounters a fire, it is difficult to quickly cool the cable tray with water and quickly dissipate the heat, and it is not convenient to use a cold source to protect the cables.

[0004] Therefore, a high-temperature resistant fire-fighting cable protection bridge is proposed, which has the ability to quickly cool the cable bridge with water and quickly dissipate heat, and is convenient for protecting the cables using a cold source. Utility Model Content

[0005] In order to overcome the problem that in the prior art, when the cable protection bridge encounters a fire, it is difficult to quickly cool the cable bridge with water and quickly dissipate the heat, and it is inconvenient to use a cold source to protect the cables.

[0006] The technical solution of the utility model is: a high-temperature resistant fire-fighting cable protection bridge, comprising a protection frame; a first water-cooling box is fixedly connected to the right side of the protection frame, a second water-cooling box is fixedly connected to the left side of the protection frame, a liquid nitrogen delivery pipe is fixedly connected to the upper end of the protection frame, a plurality of evenly distributed cold air injection pipes are fixedly connected to the left and right sides of the liquid nitrogen delivery pipe, the lower end of the cold air injection pipe passes through the upper end of the protection frame and extends to the upper inner wall of the protection frame, the rear end inner wall of the liquid nitrogen delivery pipe is fixedly connected to the cold air delivery pipe, a liquid nitrogen generator is arranged on the right side of the protection frame, the gas outlet port of the liquid nitrogen generator is fixedly connected to the outer wall of the other end of the cold air delivery pipe, a first water-cooling assembly is arranged on the first water-cooling box, a second water-cooling assembly is arranged on the second water-cooling box, and the first water-cooling box and the second water-cooling box are both hollow structures;

[0007] The first water cooling assembly includes a first set of blocks, a first water pipe, a tap water injection pipe, a first connecting pipe and a U-shaped pipe; the right side of the first water cooling box is fixedly connected with two first sets of blocks symmetrically about the center of the right side surface of the first water cooling box, the inner walls of the two first sets of blocks are fixedly connected with the first water pipe, the right side of the first water pipe is fixedly connected with the tap water injection pipe, the first water pipe is fixedly connected with the first connecting pipe, the other end of the first connecting pipe passes through the right side of the first water cooling box and extends to the inner wall of the first water cooling box, and the first water cooling box is provided with a U-shaped pipe;

[0008] The second water-cooling assembly includes a second set of blocks, a second water pipe, a tap water outlet pipe and a second connecting pipe; the left side of the second water-cooling box is fixedly connected to two second sets of blocks symmetrically about the center of the left side surface of the second water-cooling box, the inner walls of the two second sets of blocks are fixedly connected to the second water pipe, the left side of the second water pipe is fixedly connected to the tap water outlet pipe in a through-type manner, the second water pipe is fixedly connected to the second connecting pipe in a through-type manner, the other end of the second connecting pipe penetrates the left side of the second water-cooling box and extends to the inner wall of the second water-cooling box, one end of the U-shaped tube penetrates the upper end of the first water-cooling box and extends to the interior of the first water-cooling box, and the other end of the U-shaped tube penetrates the second water-cooling box and extends to the interior of the second water-cooling box;

[0009] A first groove body is opened inside the protective frame, and heat-conducting frames are fixedly connected to the middle parts of the upper and lower ends of the inner wall of the protective frame. An inner frame is fixedly connected between the two heat-conducting frames, and a rock wool body is fixedly connected to the inner wall of the inner frame. A plurality of evenly distributed cable bodies are fixedly connected through the front and rear ends of the rock wool body, and a plurality of evenly distributed heat sinks are fixedly connected to the left and right sides of the inner frame.

[0010] Preferably, when in use, the water supply end of the tap water pipe in the tap water pipe network is connected to the tap water injection pipe, and the tap water outlet pipe is connected to the pressure-free pipe of the tap water pipe in the tap water pipe network, so that the water flow direction is unidirectional. When the tap water flows in from the tap water injection pipe, the tap water will flow into the first water cooling box through the first connecting pipe, and then flow into the second water cooling box from the multiple U-shaped pipes, and then flow from the second connecting pipe and the tap water outlet pipe to the pressure-free tap water pipe, and the tap water can be used. The continuous water supply of water itself takes away the heat from the first water-cooling box and the second water-cooling box, thereby realizing efficient heat dissipation of the protection frame. In addition, the inner frame is supported by two upper and lower heat-conducting frames, and the inner frame is suspended. The rock wool body covers the cable body, which can improve the thermal insulation protection of the cable body, and the liquid nitrogen generator can be turned on to cool the interior of the protection frame, which solves the problem in the prior art that when the cable protection bridge encounters a fire, it is difficult to quickly cool the cable bridge with water and quickly dissipate the heat, and it is inconvenient to use a cold source to protect the cable.

[0011] Preferably, grooves are provided on both the left and right sides of the rock wool body. There is a gap between the end of the heat sink away from the center of the inner frame and the inner wall of the protective frame. The heat sink is made of copper sheet. The setting of the heat sink can improve the heat dissipation effect of the inner frame. The setting of grooves on both the left and right sides of the rock wool body can effectively increase the surface area of the rock wool body, thereby improving the heat exchange efficiency with the inner frame.

[0012] Preferably, the U-shaped tube is made of tungsten steel alloy. The U-shaped tube is located above the liquid nitrogen delivery pipe. The setting of the U-shaped tube can provide good protection for the liquid nitrogen delivery pipe, and the U-shaped tube made of tungsten steel alloy has good high-temperature resistance.

[0013] Preferably, the heat conduction frame is in a frame structure and is made of aluminum. The setting that the heat conduction frame is in a frame shape and made of aluminum has good heat conduction effect.

[0014] Preferably, a plurality of air outlet pipes penetrate and are fixedly connected to the upper end of the protective frame. The upper ends of two air outlet pipes in each row are jointly fixedly connected to a first mounting plate. Air outlet holes are formed through the side walls of the air outlet pipes. The air in the protective frame can be discharged outward through the air outlet pipes and the air outlet holes. The first mounting plate can be fixed to the wall by bolts to achieve stable installation of the first mounting plate, so that the air outlet pipes and their lower structures can be suspended and installed in a suitable position, and the installation is convenient.

[0015] Preferably, sealing plates are fixedly connected to the inner walls of the front and rear ends of the protective frame. A plurality of uniformly distributed protective cylinders penetrate and are fixedly connected to the ends of the sealing plates away from the center of the protective frame. The inner wall of the protective cylinder fits with the outer wall of the cable body. For the part of the cable body exposed from the protective frame, the cable body can be wrapped by the protective cylinder to improve the protection of the cable body.

[0016] Preferably, a plurality of air supply pipes penetrate and are fixedly connected to the upper end of the protective frame. The upper ends of two air supply pipes in each row are jointly fixedly connected to a fixed box. Bearing blocks are fixedly connected to the front and rear ends of the inner wall of the fixed box. A second mounting plate is fixedly connected to the upper ends of the bearing blocks. The side wall of the second mounting plate fits with the upper part of the inner wall of the fixed box. A fixed frame is fixedly connected to the center of the lower end of the second mounting plate. A storage battery is fixedly connected to the inner wall of the fixed frame. Two blowers symmetrical about the fixed frame are fixedly connected to the lower end of the second mounting plate. During use, the second mounting plate is placed on the upper ends of the bearing blocks and fixed to the bearing blocks by bolts. Since the side wall of the second mounting plate fits with the upper part of the inner wall of the fixed box, when the blower is turned on, a downward wind force will be formed. The wind force will be injected into the protective frame through the air supply pipes. The setting that the upper ends of two air supply pipes in each row are jointly fixedly connected to a fixed box enables the wind force to be divided into two strands and sent into the interior of the protective frame through the two air supply pipes respectively, so as to quickly supply air to the interior of the protective frame, realize air-cooled heat dissipation of the interior of the protective frame, and improve the heat dissipation effect of the interior of the protective frame.

[0017] Advantages of the present utility model:

[0018] 1. By connecting the water supply end of the tap water pipe in the tap water pipe network to the tap water injection pipe, and connecting the tap water outlet pipe to the non-pressure pipe of the tap water pipe in the tap water pipe network, the water flow direction is unidirectional. When tap water flows in from the tap water injection pipe, the tap water will flow into the first water cooling box through the first connecting pipe, then flow into the second water cooling box through multiple U-shaped pipes, and then flow through the second connecting pipe and the tap water outlet pipe to the non-pressure tap water pipe. Thus, the continuous water conveyance of the tap water itself can carry away the heat on the first water cooling box and the second water cooling box, achieving efficient heat dissipation for the protective frame. In addition, the inner frame is supported by two upper and lower heat conduction frames, the inner frame is suspended, and the rock wool body wraps the cable body, which can improve the heat insulation protection for the cable body. The grooves provided on the left and right sides of the rock wool body can effectively increase the surface area of the rock wool body, thereby improving the heat exchange efficiency with the inner frame. And by turning on the liquid nitrogen generator, the interior of the protective frame can be refrigerated, solving the problem in the prior art that when the cable protection bridge encounters a fire, it is difficult to quickly cool down and dissipate heat from the cable bridge with water, and it is inconvenient to use cold sources to protect the cable;

[0019] 2. The U-shaped pipe can provide good protection for the liquid nitrogen delivery pipe. And the U-shaped pipe is made of tungsten steel alloy, with good high-temperature resistance. The air inside the protective frame can be discharged outward through the air outlet pipe and the air outlet holes. The first mounting plate can be fixed to the wall with bolts, realizing the stable installation of the first mounting plate. Thus, the air outlet pipe and its lower structure can be suspended and installed in a suitable position, with convenient installation;

[0020] 3. By placing the second mounting plate on the upper end of the bearing block and fixing the second mounting plate to the bearing block with bolts, since the side wall of the second mounting plate fits the upper part of the inner wall of the fixed box, turning on the fan will form a downward wind force, and the wind force will be injected into the protective frame through the air supply pipe. The setting that the upper ends of two air supply pipes in each row are commonly fixed to the fixed box makes the wind force divide into two strands and be sent into the interior of the protective frame through the two air supply pipes respectively after passing through the fixed box, which can quickly supply air to the interior of the protective frame, realizing air-cooled heat dissipation inside the protective frame and improving the heat dissipation effect inside the protective frame. For the part of the cable body exposed outside the protective frame, the cable body can be wrapped with a protective cylinder to improve the protection of the cable body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a three-dimensional structure schematic diagram of a fire-resistant cable protection bridge that can withstand high temperatures according to the present utility model;

[0022] Figure 2 Shown is a three-dimensional structure schematic diagram of the interior of the protective frame of a fire-resistant cable protection bridge that can withstand high temperatures according to the present utility model;

[0023] Figure 3 The figure shows a three-dimensional structural schematic diagram of the air outlet pipe of a fire-resistant cable protection bridge for a fire-fighting use of the present utility model that can withstand high temperatures;

[0024] Figure 4 The figure shows a three-dimensional structural schematic diagram of the sealing plate of a fire-resistant cable protection bridge for a fire-fighting use of the present utility model that can withstand high temperatures;

[0025] Figure 5 The figure shows a three-dimensional split structural schematic diagram of the protection frame and the second water cooling box of a fire-resistant cable protection bridge for a fire-fighting use of the present utility model that can withstand high temperatures;

[0026] Figure 6 The figure shows a three-dimensional split structural schematic diagram of the fixing box and the second mounting plate of a fire-resistant cable protection bridge for a fire-fighting use of the present utility model that can withstand high temperatures.

[0027] The reference signs in the drawings are: 1, protection frame; 2, first water cooling box; 201, first sleeve block; 202, first water pipe; 203, tap water injection pipe; 204, first connecting pipe; 205, U-shaped pipe; 3, second water cooling box; 301, second sleeve block; 302, second water pipe; 303, tap water outlet pipe; 304, second connecting pipe; 4, liquid nitrogen delivery pipe; 5, cold air injection pipe; 6, cold air delivery pipe; 7, liquid nitrogen generator; 8, first tank body; 9, heat conduction frame; 10, inner frame; 11, rock wool body; 12, groove; 13, cable body; 14, heat sink; 15, air outlet pipe; 16, air outlet hole; 17, first mounting plate; 18, sealing plate; 19, protection cylinder; 20, air supply pipe; 21, fixing box; 22, bearing block; 23, second mounting plate; 24, fixing frame; 25, storage battery; 26, fan. Detailed implementation manners

[0028] The present utility model will be further described below with reference to the drawings and embodiments. Embodiment

[0029] Please refer to Figures 1-5, a fire-resistant cable protection bridge that can withstand high temperatures, comprising a protection frame 1; a first water-cooling box 2 is fixedly connected to the right side of the protection frame 1, a second water-cooling box 3 is fixedly connected to the left side of the protection frame 1, a liquid nitrogen delivery pipe 4 is fixedly connected to the upper end of the protection frame 1, a plurality of uniformly distributed cold air injection pipes 5 are fixedly connected to both the left and right sides of the liquid nitrogen delivery pipe 4, the lower ends of the cold air injection pipes 5 pass through the upper end of the protection frame 1 and extend to the inner wall of the upper end of the protection frame 1, a cold air delivery pipe 6 is fixedly connected to the inner wall of the rear end of the liquid nitrogen delivery pipe 4, a liquid nitrogen generator 7 is arranged on the right side of the protection frame 1, and the gas outlet port of the liquid nitrogen generator 7 is fixedly connected to the outer wall of the other end of the cold air delivery pipe 6. A first water-cooling component is arranged on the first water-cooling box 2, a second water-cooling component is arranged on the second water-cooling box 3, and both the first water-cooling box 2 and the second water-cooling box 3 are of hollow structure;

[0030] The first water-cooling component includes a first sleeve block 201, a first water pipe 202, a tap water injection pipe 203, a first connecting pipe 204, and a U-shaped pipe 205; two first sleeve blocks 201 that are symmetric about the center of the right side surface of the first water-cooling box 2 are fixedly connected to the right side of the first water-cooling box 2 in a penetrating manner, a first water pipe 202 is fixedly connected to the inner walls of the two first sleeve blocks 201, a tap water injection pipe 203 is fixedly connected to the right side of the first water pipe 202 in a penetrating manner, a first connecting pipe 204 is fixedly connected to the first water pipe 202 in a penetrating manner, the other end of the first connecting pipe 204 passes through the right side of the first water-cooling box 2 and extends to the inner wall of the first water-cooling box 2, and a U-shaped pipe 205 is arranged on the first water-cooling box 2;

[0031] The second water-cooling component includes a second sleeve block 301, a second water pipe 302, a tap water outlet pipe 303, and a second connecting pipe 304; two second sleeve blocks 301 that are symmetric about the center of the left side surface of the second water-cooling box 3 are fixedly connected to the left side of the second water-cooling box 3, a second water pipe 302 is fixedly connected to the inner walls of the two second sleeve blocks 301, a tap water outlet pipe 303 is fixedly connected to the left side of the second water pipe 302 in a penetrating manner, a second connecting pipe 304 is fixedly connected to the second water pipe 302 in a penetrating manner, the other end of the second connecting pipe 304 passes through the left side of the second water-cooling box 3 and extends to the inner wall of the second water-cooling box 3, one end of the U-shaped pipe 205 passes through the upper end of the first water-cooling box 2 and extends to the inside of the first water-cooling box 2, and the other end of the U-shaped pipe 205 passes through the second water-cooling box 3 and extends to the inside of the second water-cooling box 3;

[0032] A first groove 8 is opened inside the protection frame 1, heat-conducting frames 9 are fixedly connected to the middle parts of the upper and lower ends of the inner wall of the protection frame 1, an inner frame 10 is fixedly connected between the two heat-conducting frames 9, a rock wool body 11 is fixedly connected to the inner wall of the inner frame 10, a plurality of uniformly distributed cable bodies 13 penetrate through the front and rear ends of the rock wool body 11, and a plurality of uniformly distributed heat dissipation fins 14 are fixedly connected to both the left and right sides of the inner frame 10.

[0033] Please refer to Figure 1 and 2, in this embodiment, grooves 12 are provided on both the left and right sides of the rock wool body 11. There is a gap between the end of the heat sink 14 far from the center of the inner frame 10 and the inner wall of the protective frame 1. The heat sink 14 is made of copper sheet.

[0034] Please refer to Figure 1 and 2 , in this embodiment, the U-shaped tube 205 is made of tungsten steel alloy, and the U-shaped tube 205 is located above the liquid nitrogen delivery pipe 4.

[0035] Please refer to Figure 1 and 2 , in this embodiment, the heat conduction frame 9 has a frame structure and is made of aluminum.

[0036] Please refer to Figure 1 and 2 , in this embodiment, a plurality of air outlet pipes 15 are fixedly connected through the upper end of the protective frame 1. The upper ends of two air outlet pipes 15 in each row are jointly fixedly connected with a first mounting plate 17. Air outlet holes 16 are formed through the side walls of the air outlet pipes 15.

[0037] Please refer to Figure 1 and 2 , in this embodiment, sealing plates 18 are fixedly connected to the inner walls of the front and rear ends of the protective frame 1. A plurality of uniformly distributed protective cylinders 19 are fixedly connected through the ends of the sealing plates 18 far from the center of the protective frame 1. The inner walls of the protective cylinders 19 are in contact with the outer walls of the cable body 13.

[0038] In this embodiment: When in use, the water supply end of the tap water pipe in the tap water network is connected to the tap water injection pipe 203, and the tap water outlet pipe 303 is connected to the non-pressure pipe of the tap water pipe in the tap water network, so that the water flow direction is unidirectional. When tap water flows in from the tap water injection pipe 203, the tap water will flow into the first water cooling box 2 through the first connecting pipe 204, then flow into the second water cooling box 3 through a plurality of U-shaped tubes 205, and then flow through the second connecting pipe 304 and the tap water outlet pipe 303 to the non-pressure tap water pipe, so that the continuous water conveyance of the tap water itself can take away the heat on the first water cooling box 2 and the second water cooling box 3, realizing efficient heat dissipation of the protective frame 1. In addition, the inner frame 10 is supported by two upper and lower heat conduction frames 9, the inner frame 10 is suspended, and the rock wool body 11 wraps the cable body 13, which can improve the heat insulation protection of the cable body 13. The arrangement of the grooves 12 provided on the left and right sides of the rock wool body 11 can effectively increase the surface area of the rock wool body 11, thereby improving the heat exchange efficiency with the inner frame 10. Turn on the liquid nitrogen generator 7 so that the cold air is injected into the liquid nitrogen delivery pipe 4 through the cold air delivery pipe 6, and then injected into the cold air injection pipe 5 through the liquid nitrogen delivery pipe 4. The cold air is injected into the interior of the protective frame 1 from the cold air injection pipe 5, which can improve the refrigeration effect inside the protective frame 1 and improve the protection of the cable body 13. Embodiment

[0039] Please refer to Figure 5 , on the basis of Embodiment 1, the present application provides a technical solution: A plurality of air supply pipes 20 are fixedly connected through the upper end of the protective frame 1. The upper ends of two air supply pipes 20 in each row are jointly fixedly connected with a fixed box 21. The front and rear ends of the inner wall of the fixed box 21 are fixedly connected with bearing blocks 22. The upper ends of the bearing blocks 22 are fixedly connected with a second mounting plate 23. The side wall of the second mounting plate 23 is attached to the upper part of the inner wall of the fixed box 21. The center of the lower end of the second mounting plate 23 is fixedly connected with a fixed frame 24. A storage battery 25 is fixedly connected to the inner wall of the fixed frame 24. Two blowers 26 symmetrical about the fixed frame 24 are fixedly connected to the lower end of the second mounting plate 23.

[0040] In this embodiment: When in use, place the second mounting plate 23 on the upper end of the bearing block 22 and fix the second mounting plate 23 on the bearing block 22 by using bolts. Since the side wall of the second mounting plate 23 is attached to the upper part of the inner wall of the fixed box 21, turn on the blower 26 to form a downward wind force. The wind force will be injected into the protective frame 1 after passing through the air supply pipes 20. The setting that the upper ends of two air supply pipes 20 in each row are jointly fixedly connected with the fixed box 21 enables the wind force to be divided into two strands and respectively sent into the interior of the protective frame 1 through the two air supply pipes 20 after passing through the fixed box 21, which can quickly supply air to the interior of the protective frame 1, realize the air-cooled heat dissipation inside the protective frame 1, and improve the heat dissipation effect inside the protective frame 1.

[0041] Working principle: First, connect the water supply end of the tap water pipe in the tap water network to the tap water injection pipe 203, and connect the tap water outlet pipe 303 to the non-pressure pipe of the tap water pipe in the tap water network, so that the water flow direction is unidirectional. When tap water flows in from the tap water injection pipe 203, the tap water will flow into the first water-cooled box 2 through the first connecting pipe 204, then flow into the second water-cooled box 3 through a plurality of U-shaped pipes 205, and then flow to the non-pressure tap water pipe through the second connecting pipe 304 and the tap water outlet pipe 303, so that the continuous water conveyance of the tap water itself can take away the heat on the first water-cooled box 2 and the second water-cooled box 3, realizing the efficient heat dissipation of the protective frame 1;

[0042] When in use, since the inner frame 10 is supported by two upper and lower heat-conducting frames 9 and the inner frame 10 is suspended, the rock wool body 11 wraps the cable body 13, which can improve the heat insulation protection of the cable body 13. By turning on the liquid nitrogen generator 7, the cold air is injected into the liquid nitrogen delivery pipe 4 through the cold air delivery pipe 6, and then injected into the cold air injection pipe 5 through the liquid nitrogen delivery pipe 4. The cold air is injected into the interior of the protective frame 1 from the cold air injection pipe 5, which can improve the refrigeration effect inside the protective frame 1 and improve the protection of the cable body 13;

[0043] When a fire occurs or the temperature is high near the protection frame 1, the fan 26 is turned on to form a downward wind force. The wind force will be injected into the protection frame 1 after passing through the air supply pipe 20. The arrangement that the upper ends of two air supply pipes 20 in each row are commonly fixedly connected to the fixed box 21 enables the wind force to be divided into two strands and respectively sent into the interior of the protection frame 1 through the two air supply pipes 20 after passing through the fixed box 21, so that the interior of the protection frame 1 can be quickly supplied with air, realizing air-cooled heat dissipation inside the protection frame 1 and improving the heat dissipation effect inside the protection frame 1.

[0044] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A fire-fighting cable protection bridge capable of withstanding high temperatures, comprising a protection frame (1); characterized in that: A first water-cooling box (2) is fixedly connected to the right side of the protection frame (1), a second water-cooling box (3) is fixedly connected to the left side of the protection frame (1), a liquid nitrogen delivery pipe (4) is fixedly connected to the upper end of the protection frame (1), a plurality of evenly distributed cold air injection pipes (5) are fixedly connected to the left and right sides of the liquid nitrogen delivery pipe (4), the lower end of the cold air injection pipe (5) passes through the upper end of the protection frame (1) and extends to the inner wall of the upper end of the protection frame (1), a cold air delivery pipe (6) is fixedly connected to the inner wall of the rear end of the liquid nitrogen delivery pipe (4), a liquid nitrogen generator (7) is arranged on the right side of the protection frame (1), an air outlet port of the liquid nitrogen generator (7) is fixedly connected to the outer wall of the other end of the cold air delivery pipe (6), a first water-cooling assembly is arranged on the first water-cooling box (2), a second water-cooling assembly is arranged on the second water-cooling box (3), and both the first water-cooling box (2) and the second water-cooling box (3) are hollow structures; The first water cooling component comprises a first set of blocks (201), a first water pipe (202), a tap water injection pipe (203), a first connecting pipe (204) and a U-shaped pipe (205); the right side of the first water cooling box (2) is fixedly connected with two first sets of blocks (201) symmetrically about the center of the right side surface of the first water cooling box (2); the inner walls of the two first sets of blocks (201) are fixedly connected with the first water pipe (202); the right side of the first water pipe (202) is fixedly connected with the tap water injection pipe (203); the first water pipe (202) is fixedly connected with the first connecting pipe (204); the other end of the first connecting pipe (204) passes through the right side of the first water cooling box (2) and extends to the inner wall of the first water cooling box (2); the first water cooling box (2) is provided with a U-shaped pipe (205); The second water cooling component comprises a second set of blocks (301), a second water pipe (302), a tap water outlet pipe (303) and a second connecting pipe (304); the left side of the second water cooling box (3) is fixedly connected with two second sets of blocks (301) symmetrically about the center of the left side surface of the second water cooling box (3); the inner walls of the two second sets of blocks (301) are fixedly connected with the second water pipe (302); the left side of the second water pipe (302) is fixedly connected with the tap water outlet pipe (303); the second water pipe (302) is fixedly connected with the second connecting pipe (304); the other end of the second connecting pipe (304) passes through the left side of the second water cooling box (3) and extends to the inner wall of the second water cooling box (3); one end of the U-shaped tube (205) passes through the upper end of the first water cooling box (2) and extends to the interior of the first water cooling box (2); the other end of the U-shaped tube (205) passes through the second water cooling box (3) and extends to the interior of the second water cooling box (3); A first slot (8) is provided inside the protection frame (1); heat-conducting frames (9) are fixedly connected to the middle of the upper and lower ends of the inner wall of the protection frame (1); an inner frame (10) is fixedly connected between the two heat-conducting frames (9); a rock wool body (11) is fixedly connected to the inner wall of the inner frame (10); a plurality of evenly distributed cable bodies (13) are fixedly connected through the front and rear ends of the rock wool body (11); and a plurality of evenly distributed heat sinks (14) are fixedly connected to the left and right sides of the inner frame (10).

2. The high temperature resistant fire protection cable bridge according to claim 1, characterized in that: The left and right sides of the rock wool body (11) are both provided with grooves (12), a gap exists between the end of the heat sink (14) away from the center of the inner frame (10) and the inner wall of the protection frame (1), and the heat sink (14) is made of copper sheet.

3. The high temperature resistant fire protection cable bridge according to claim 1, characterized in that: The U-shaped tube (205) is made of tungsten steel alloy, and the U-shaped tube (205) is located above the liquid nitrogen delivery tube (4).

4. The high temperature resistant fire protection cable bridge according to claim 1, characterized in that: The heat conducting frame (9) is a frame-shaped structure, and is made of aluminum.

5. The high temperature resistant fire protection cable bridge according to claim 1, characterized in that: A plurality of air outlet pipes (15) are fixedly connected through the upper end of the protection frame (1), the upper ends of two air outlet pipes (15) in each row are fixedly connected to a first mounting plate (17), and air outlet holes (16) are opened through the side walls of the air outlet pipes (15).

6. The high temperature resistant fire protection cable bridge according to claim 1, characterized in that: Sealing plates (18) are fixedly connected to the inner walls of the front and rear ends of the protection frame (1), and a plurality of evenly distributed protection tubes (19) are fixedly connected through one end of the sealing plate (18) away from the center of the protection frame (1), and the inner wall of the protection tube (19) is in contact with the outer wall of the cable body (13).

7. The high temperature resistant fire protection cable bridge according to claim 1, characterized in that: A plurality of air supply pipes (20) are fixedly connected through the upper end of the protection frame (1), the upper ends of two air supply pipes (20) in each row are commonly fixedly connected to a fixing box (21), the front and rear ends of the inner wall of the fixing box (21) are fixedly connected to a bearing block (22), the upper end of the bearing block (22) is fixedly connected to a second mounting plate (23), the side wall of the second mounting plate (23) is fitted with the upper part of the inner wall of the fixing box (21), the center of the lower end of the second mounting plate (23) is fixedly connected to a fixing frame (24), the inner wall of the fixing frame (24) is fixedly connected to a storage battery (25), and the lower end of the second mounting plate (23) is fixedly connected to two fans (26) symmetrical with respect to the fixing frame (24).

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