Fireproof structure of metal air pipe

Abstract

The utility model discloses a fireproof structure of a metal air pipe, and relates to the technical field of metal air pipes. The device comprises a water guide layer; the top of the fixed fireproof plate is fixedly connected with the bottom of the water guide layer; the top of the sealing strip is fixedly connected with the bottom of the water guide layer; the outer wall of the sliding fireproof plate is in sliding connection with the outer wall of the fixed fireproof plate; the top of the fire retardant device is fixedly connected with the bottom of the water guide layer; the bottom of the fireproof air pipe is slidably connected with the outer wall of the fire retardant device, the fireproof air pipe is arranged, a closed space defined by the fixed fire damper, the sealing strip, the sliding fire damper and the fire retardant device is arranged on the outer side of the fireproof air pipe and serves as a first layer of protection of the metal air pipe, and the fireproof air pipe is provided with a second layer of protection of the metal air pipe. The heat transfer efficiency is reduced through two-layer space blocking, and the purpose of delaying the temperature rising speed of air in the air pipe is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal air ducts, and particularly relates to a fireproof structure of a metal air duct. Background Art

[0002] A metal air duct is a duct system used for air transportation and distribution. It is mostly made of metal materials and has the characteristics of corrosion resistance, high strength, good airtightness, etc. It is commonly used in the ventilation and air conditioning systems of industrial and civil buildings. It can be made into various shapes and sizes to adapt to different installation environments and requirements.

[0003] In the prior art, when a fire breaks out in a building, due to the relatively thin wall of the metal air duct itself, the air inside is easily heated. Since the metal air duct is connected to the ventilation system in the building, the high-temperature air flowing to other areas will heat the remaining space, thus compressing the living space of the people in the building and ultimately leading to casualties. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the technical solution adopted by the utility model to solve its technical problems is: a fireproof structure of a metal air duct, including: a water guide layer; a fixed fire baffle, the top of the fixed fire baffle is fixedly connected to the bottom of the water guide layer; a sealing strip, the top of the sealing strip is fixedly connected to the bottom of the water guide layer; a sliding fire baffle, the outer wall of the sliding fire baffle is slidably connected to the outer wall of the fixed fire baffle; a fire blocking device, the top of the fire blocking device is fixedly connected to the bottom of the water guide layer; a fireproof air duct, the bottom of the fireproof air duct is slidably connected to the outer wall of the fire blocking device.

[0005] Preferably, the fireproof air duct includes a fire blocking layer, both ends of the fire blocking layer are fixedly connected with angle steels, ventilation grooves are opened in the walls of the angle steels, fixing rods are fixedly connected to the outer walls of the angle steels through fixing grooves, and the fixing grooves are opened in the walls of the angle steels. The outer wall of the fixing rod is fixedly connected with an inner air duct, the inner wall of the inner air duct is fixedly connected to the outer wall of the fire blocking layer through fixing bolts, the inner wall of the fire blocking layer is fixedly connected to the side of the fixing rod away from the inner air duct, and the inner wall of the angle steel is fixedly connected to the outer wall of the inner air duct.

[0006] Preferably, the fire blocking device includes a fixed cylinder, a water pipe is fixedly connected to the inner wall of the fixed cylinder, a cross bracket is fixedly connected to the bottom of the fixed cylinder, a receiving groove is opened in the wall of the cross bracket, a water storage box is fixedly connected to the bottom of the cross bracket, a smoke blocking plate is fixedly connected to the middle of the inner wall of the water storage box, a water outlet plate is arranged below the smoke blocking plate, water outlet holes are opened in the wall of the water outlet plate, the side wall of the water outlet plate is fixedly connected to the bottom of the inner wall of the water storage box, the bottom of the water pipe is fixedly connected to the top of the inner wall of the water storage box, the top of the cross bracket is in contact with the bottom of the fire blocking layer, and both sides of the sealing strip are slidably connected to the outer wall of the sliding fire baffle.

[0007] The beneficial effects of the present utility model are as follows:

[0008] 1. By providing a fireproof air duct in the present utility model, there is a sealed space surrounded by a fixed fire baffle, a sealing strip, a sliding fire baffle and a fire blocking device on the outer side of the fireproof air duct, which serves as the first layer of protection for the metal air duct. The fireproof air duct itself has a second layer of protection. The two-layer space blocks reduce the heat transfer efficiency, thereby protecting the inner air duct. When heat reaches the second protection space, heat exchange is carried out through the ventilation slots to prevent the air duct from heating up too quickly on one side.

[0009] 2. By providing a fire blocking device in the present utility model, a fire blocking device is provided at the bottom of the air duct to increase the path of heat transfer to the air duct. At the same time, the fire blocking device can be connected to a water pipe, and the flame height is reduced by sprinkling water to reduce heat transfer. For the high temperature and smoke generated by combustion, the flowing water flow is used for cooling and blocking effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is the front view of the present utility model;

[0011] Figure 2 is the cross-sectional view of the present utility model;

[0012] Figure 3 is the structural schematic diagram of the fireproof air duct of the present utility model;

[0013] Figure 4 is the structural schematic diagram of the fire blocking device of the present utility model.

[0014] In the figure: 1, water guide layer; 2, fixed fire baffle; 3, sealing strip; 4, sliding fire baffle; 5, fireproof air duct; 6, fire blocking device; 51, fire baffle layer; 52, angle steel; 53, ventilation slot; 54, fixed slot; 55, fixed rod; 56, inner air duct; 57, fixed bolt; 61, fixed cylinder; 62, water pipe; 63, cross bracket; 64, receiving groove; 65, water storage box; 66, smoke blocking plate; 67, water outlet plate; 68, water outlet hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following further describes the present utility model in detail with reference to the drawings and specific embodiments. The embodiments of the present utility model are given for purposes of illustration and description, and are not intended to be exhaustive or to limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and to enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0016] Embodiment: Please refer toFigure 1 - Figure 4 The present utility model provides a technical solution: a fireproof structure for a metal air duct, comprising: a water guide layer 1; a fixed fire baffle 2, the top of the fixed fire baffle 2 is fixedly connected to the bottom of the water guide layer 1; a sealing strip 3, the top of the sealing strip 3 is fixedly connected to the bottom of the water guide layer 1; a sliding fire baffle 4, the outer wall of the sliding fire baffle 4 is slidably connected to the outer wall of the fixed fire baffle 2; a fire blocking device 6, the top of the fire blocking device 6 is fixedly connected to the bottom of the water guide layer 1; a fireproof air duct 5, the bottom of the fireproof air duct 5 is slidably connected to the outer wall of the fire blocking device 6. The fireproof air duct 5 is installed on a cross bracket 63 fixed by a fixed cylinder 61. The receiving groove 64 of the cross bracket 63 is used to prevent the fixing bolt 57, thereby positioning the fireproof air duct 5. Then, the sliding fire baffles 4 on both sides of the fireproof air duct 5 are pulled down and placed on both sides of the cross bracket 63. At this time, the fireproof air duct 5 is wrapped by a sealed space surrounded by the fixed fire baffle 2, the sealing strip 3, the sliding fire baffle 4 and the fire blocking device 6. This space is relatively airtight, making it difficult for external factors to enter and affect the fireproof air duct 5. The heat transfer efficiency of the gas in this sealed space is lower than that of metal, so it takes a longer time for the heat to be transferred into the fireproof air duct 5 when there is a fire outside.

[0017] The fireproof air duct 5 includes a fire baffle layer 51. Angle steels 52 are fixedly connected to both ends of the fire baffle layer 51. Ventilation grooves 53 are formed in the walls of the angle steels 52. A fixing rod 55 is fixedly connected to the outer wall of the angle steel 52 through a fixing groove 54, and the fixing groove 54 is formed in the wall of the angle steel 52. An inner air duct 56 is fixedly connected to the outer wall of the fixing rod 55. The inner wall of the inner air duct 56 is fixedly connected to the outer wall of the fire baffle layer 51 through a fixing bolt 57. The inner wall of the fire baffle layer 51 is fixedly connected to the side of the fixing rod 55 away from the inner air duct 56. The inner wall of the angle steel 52 is fixedly connected to the outer wall of the inner air duct 56. The fireproof air duct 5 itself also has a sealed space for reducing the heat transfer speed. Among them, the angle steels 52 of the fireproof air duct 5 and the fixing rods 55 on the fixing grooves 54 form the main framework, and separate the fire baffle layer 51 and the inner air duct 56, so that there is an air layer between the fire baffle layer 51 and the inner air duct 56 to reduce the heat transfer rate. The ventilation grooves 53 connect the air layers of two adjacent fireproof air ducts 5. When one side of the air duct pipeline is exposed to flame roasting, the air in the air layer inside the fireproof air duct 5 on this side is heated and expanded, and at the same time, the molecular movement is intensified. In order to achieve the heat balance in the sealed space, it will exchange air with the air in other fireproof air ducts 5.

[0018] The fire prevention device 6 includes a fixed cylinder 61. The inner wall of the fixed cylinder 61 is fixedly connected with a water pipe 62. The bottom of the fixed cylinder 61 is fixedly connected with a cross bracket 63. A receiving groove 64 is formed in the wall of the cross bracket 63. The bottom of the cross bracket 63 is fixedly connected with a water storage box 65. In the middle of the inner wall of the water storage box 65, a smoke blocking plate 66 is fixedly connected. Below the smoke blocking plate 66, a water outlet plate 67 is arranged. Water outlet holes 68 are formed in the wall of the water outlet plate 67. The side wall of the water outlet plate 67 is fixedly connected with the bottom of the inner wall of the water storage box 65. The bottom of the water pipe 62 is fixedly connected with the top of the inner wall of the water storage box 65. The top of the cross bracket 63 is in contact with the bottom of the fire blocking layer 51. Both sides of the sealing strip 3 are slidably connected with the outer wall of the sliding fire blocking plate 4. When an open fire appears inside the floor and triggers the sprinkler, through the external pipeline of the sprinkler, water flows into the water pipe 62 through the water guiding layer 1 on the ceiling. The water pipe 62 injects water flow into the water storage box 65 and stores water in the upper half space enclosed by the water storage box 65 and the smoke blocking plate 66. While storing water, since the smoke blocking plate 66 has a notch near the water inlet position of the water pipe 62, the water flow falls on the water outlet plate 67 through the smoke blocking plate 66 under the action of its own gravity and finally falls from the fire prevention device 6 through the water outlet holes 68 of the water outlet plate 67. The falling water flow has the effect of reducing the flame, making it difficult for the fire tongue to contact the fire prevention device 6. When the water flow in the upper half of the water storage box 65 falls, it knocks down the soot, and at the same time, the flowing water in the water storage box 65 cools the water storage box 65.

[0019] Working principle:

[0020] During use, the fire prevention air duct 5 is installed on the cross bracket 63 fixed by the fixed cylinder 61. The receiving groove 64 of the cross bracket 63 is used to prevent the fixing bolts 57, thereby positioning the fire prevention air duct 5. Then, the sliding fire blocking plates 4 on both sides of the fire prevention air duct 5 are pulled down and placed on both sides of the cross bracket 63. At this time, the fire prevention air duct 5 is wrapped by the sealed space enclosed by the fixed fire blocking plate 2, the sealing strip 3, the sliding fire blocking plate 4 and the fire prevention device 6. This space is relatively airtight, making it difficult for external factors to enter and affect the fire prevention air duct 5. The heat transfer efficiency of the gas in this sealed space is lower than that of metal, so when there is a fire outside, it takes a longer time for the heat to be transferred into the fire prevention air duct 5. The fire prevention air duct 5 itself also has a sealed space to reduce the heat transfer speed. Among them, the angle steel 52 of the fire prevention air duct 5 and the fixing rods 55 on the fixing grooves 54 form the main framework, and block the fire blocking layer 51 and the inner air duct 56, so that there is an air layer between the fire blocking layer 51 and the inner air duct 56 to reduce the heat transfer rate. The ventilation slots 53 connect the air layers of two connected fire prevention air ducts 5. When one side of the air duct pipeline is exposed to the flame, the air in the air layer inside the fire prevention air duct 5 on this side is heated and expands, and at the same time, the molecular movement intensifies. In order to achieve the heat balance in the sealed space, it will exchange air with the air in other fire prevention air ducts 5, further reducing the heat transfer speed, thereby achieving the fire prevention effect.

[0021] A fire prevention device 6 is provided. When an open fire appears inside the floor and triggers the sprinkler, the water flows through the external pipeline of the sprinkler and into the water pipe 62 through the water guiding layer 1 on the ceiling. The water pipe 62 injects the water flow into the water storage box 65, and stores water in the upper half space enclosed by the water storage box 65 and the smoke blocking plate 66. While storing water, since the smoke blocking plate 66 has a notch near the water inlet position of the water pipe 62, the water flow falls onto the water outlet plate 67 through the smoke blocking plate 66 under the action of its own gravity, and finally falls from the fire prevention device 6 through the water outlet holes 68 of the water outlet plate 67. The falling water flow has the effect of reducing the flame, making it difficult for the fire tongue to contact the fire prevention device 6. At this time, smoke and heat will still reach the inside of the fire prevention device 6 through the water outlet holes 68. The fire prevention device 6 blocks the direct entry of smoke into the water pipe 62 through the smoke blocking plate, and the falling water flow in the upper half of the water storage box 65 will also knock down the smoke. The flowing water in the water storage box 65 cools the water storage box 65, preventing the heat from directly contacting the fire prevention air duct 5, so as to protect the fire prevention air duct 5 and prevent smoke from entering the inside of the fire prevention air duct 5 at the same time.

[0022] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. A fireproof structure of a metal air duct, characterized in that: include: Aquifer (1); A fixed fire baffle (2), the top of which is fixedly connected to the bottom of the water-conducting layer (1); A sealing strip (3), the top of the sealing strip (3) being fixedly connected to the bottom of the water-conducting layer (1); A sliding fire baffle (4), wherein the outer wall of the sliding fire baffle (4) is slidably connected to the outer wall of the fixed fire baffle (2); A fire-blocking device (6), the top of which is fixedly connected to the bottom of the water-conducting layer (1); A fireproof air duct (5), wherein the bottom of the fireproof air duct (5) is slidably connected to the outer wall of the fire-blocking device (6).

2. The fireproof structure of a metal air duct according to claim 1, characterized in that: The fireproof air duct (5) comprises a fire barrier layer (51), the two ends of the fire barrier layer (51) are fixedly connected to angle steels (52), a ventilation groove (53) is provided in the wall of the angle steel (52), the outer wall of the angle steel (52) is fixedly connected to a fixing rod (55) via a fixing groove (54), and the fixing groove (54) is provided in the wall of the angle steel (52), the outer wall of the fixing rod (55) is fixedly connected to an inner air duct (56), and the inner wall of the inner air duct (56) is fixedly connected to the outer wall of the fire barrier layer (51) via fixing bolts (57).

3. The fireproof structure of a metal air duct according to claim 2, characterized in that: The inner wall of the fireproof layer (51) is fixedly connected to the side of the fixing rod (55) away from the inner air duct (56), and the inner wall of the angle steel (52) is fixedly connected to the outer wall of the inner air duct (56).

4. The fireproof structure of a metal air duct according to claim 2, characterized in that: The fire blocking device (6) comprises a fixed cylinder (61), the inner wall of the fixed cylinder (61) is fixedly connected to a water pipe (62), the bottom of the fixed cylinder (61) is fixedly connected to a cross bracket (63), a receiving groove (64) is provided in the wall of the cross bracket (63), a water storage box (65) is fixedly connected to the bottom of the cross bracket (63), a smoke blocking plate (66) is fixedly connected to the middle of the inner wall of the water storage box (65), a water outlet plate (67) is provided below the smoke blocking plate (66), and a water outlet hole (68) is provided in the wall of the water outlet plate (67).

5. The fireproof structure of a metal air duct according to claim 4, characterized in that: The side wall of the water outlet plate (67) is fixedly connected to the bottom of the inner wall of the water storage box (65), and the bottom of the water pipe (62) is fixedly connected to the top of the inner wall of the water storage box (65).

6. The fireproof structure of a metal air duct according to claim 4, characterized in that: The top of the cross bracket (63) is in contact with the bottom of the fire barrier layer (51), and the two sides of the sealing strip (3) are slidably connected to the outer wall of the sliding fire barrier plate (4).

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