Rectangular fire-resistant air pipe with double-sided steel plate structure

Abstract

The utility model discloses a rectangular fire-resistant air duct with a double-sided steel plate structure, which comprises a fire-resistant steel plate, corner fittings are arranged at the upper part and the lower part of the fire-resistant steel plate, a slot I is formed in one side of each corner fitting, fastening screw holes are formed in two ends of each slot I, mounting screw holes are formed in two ends of each corner fitting, and protective plates are arranged on the front surface and the back surface of the fire-resistant steel plate. Counterbores are formed in the two ends of the protection plate, pressing plates are arranged in the counterbores, mounting screws are rotationally mounted in the mounting screw holes, and fastening screws are mounted in the fastening screw holes in a threaded mode. According to the rectangular fire-resistant air pipe of the double-face steel plate structure, the fireproof steel plates are inserted into the first inserting grooves in the two sides of the corner pieces and fixed through fastening screws, after a rectangle is formed, the protective plates are attached to the front face and the back face, and the mounting screws are screwed into the two ends for fixing; and the fire-resistant effect of the air pipe is better.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a rectangular fire-resistant air duct with a double-sided steel plate structure. Background Art

[0002] The air duct is a piping system used for air transportation and distribution, and the fire-resistant air duct has a certain fire resistance due to the material itself, thereby ensuring that the ventilation system can remain intact within a certain fire time. For example, the prior art: CN215673910U, a reinforcement mechanism for a fire-resistant air duct for nuclear power; comprising an air duct; the air duct is in the shape of a rectangular pipe, and a reinforcement frame is inserted at the front and rear ends of the air duct, the top of the reinforcement frame is clamped with reinforcing ribs, and the bottom of the reinforcement frame is clamped with an anti-loosening mechanism; the support frame is slidably connected to the air duct; the connecting frame is connected to the left and right sides of the bottom of the reinforcement frame.

[0003] There are other existing technologies:

[0004] CN217502886U, a combined fire-resistant air duct;

[0005] CN220470868U, a floating bead silicon crystal fire-resistant air duct for clean workshops with good sealing performance.

[0006] The rectangular fire-resistant air duct with a double-sided steel plate structure mentioned in the above-mentioned prior art is mostly a single-layer air duct structure, which is easy to deform during use, and because the single-layer heat transfer speed is fast, the heat insulation effect is relatively general. Utility Model Content

[0007] The utility model aims to provide a rectangular fire-resistant air duct with a double-sided steel plate structure to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rectangular fire-resistant air duct with a double-sided steel plate structure, comprising a fireproof steel plate, characterized in that: the fireproof steel plate is provided with angle pieces at the upper and lower positions, a slot one is provided on one side of the angle piece, fastening screw holes are provided at both ends of the slot one, mounting screw holes are provided at both ends of the angle piece, guard plates are provided on the front and back sides of the fireproof steel plate, countersunk holes are provided at both ends of the guard plates, a pressure plate is provided inside the countersunk holes, a slot two is provided on the back side of the guard plate, mounting screws are rotatably installed inside the mounting screw holes, and fastening screws are threadedly installed inside the fastening screw holes.

[0009] Preferably, there are two layers of fireproof steel plates between the two corner pieces.

[0010] Preferably, the width of slot one and slot two is the same as the thickness of the fireproof steel plate.

[0011] Preferably, the corner pieces and the guard plates are chamfered at the four corners of the air duct, and the corner pieces and the guard plates are flush at the chamfers.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The rectangular fire-resistant air duct with double-sided steel plate structure has fire-resistant steel plates inserted into slot 1 on both sides of the corner pieces and fixed by tightening screws. After forming a rectangle, guard plates are attached to the front and back sides. The fire-resistant steel plates are inserted into slot 2 of the guard plates and fixed by screwing in mounting screws at both ends. The overall process is simple and can be quickly installed and disassembled.

[0014] 2. The rectangular fire-resistant air duct with double-sided steel plate structure has a double-layer structure of fire-resistant steel plates between the corner pieces. The double-layer fire-resistant steel plates can effectively block the transfer of heat inside and outside, making the air duct more fire-resistant. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a partially enlarged exploded view of the structure of the utility model;

[0017] Figure 3 This is a cross-sectional view of the corner piece position of the utility model structure;

[0018] Figure 4 This is a cross-sectional view of the position of the structural guard plate of the utility model.

[0019] In the figure: 1, fireproof steel plate; 2, angle piece; 3, guard plate; 4, mounting screws; 5, fastening screws; 201, slot one; 202, fastening screw hole; 203, mounting screw hole; 301, countersunk hole; 302, pressure plate; 303, slot two. DETAILED DESCRIPTION

[0020] 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.

[0021] Example: See Figure 1 The utility model provides a technical solution: a rectangular fire-resistant air duct with a double-sided steel plate structure.

[0022] Among them, the fireproof steel plate 1 is provided with corner pieces 2 at the upper and lower parts, a slot 201 is opened on one side of the corner piece 2, fastening screw holes 202 are opened at both ends of the slot 201, and mounting screw holes 203 are opened at both ends of the corner piece 2. A guard plate 3 is provided on the front and back of the fireproof steel plate 1, countersunk holes 301 are opened at both ends of the guard plate 3, a pressure plate 302 is arranged inside the countersunk hole 301, a slot 2 303 is arranged on the back of the guard plate 3, a mounting screw 4 is rotatably installed inside the mounting screw hole 203, and a fastening screw 5 is threadedly installed inside the fastening screw hole 202.

[0023] In this embodiment, the corner piece 2 is L-shaped, with two sides of the same length connected at right angles. The fireproof steel plate 1 is inserted into the slot 1 201 and has fastening screw holes 202 on both sides. The fastening screws 5 are screwed in to fix the fireproof steel plate 1 in the slot 1 201. The fireproof steel plate 1 and the corner piece 2 have the same length, and the two ends are aligned and fit together to form a rectangle. The corner piece 2 is the right angle of the rectangle, and the fireproof steel plate 1 is the rectangular side. The guard plate 3 is installed on the front and back of the rectangular air duct, and the slot 2 303 of the guard plate 3 is inserted into the fireproof steel plate 1. The two ends of the guard plate 3 fit the two ends of the corner piece 2. When the two guard plates 3 fit at right angles, the semicircular countersunk holes 301 just form a circular hole, and the two pressing plates 302 fit in the center position to leave a gap with the same width as the diameter of the mounting screw hole 4, and align with the mounting screw hole 4 at the center position of the corner piece 2. The mounting screw 4 is screwed into the mounting screw hole 4 and pressed on the pressing plate 302 to fix the guard plate 3, thereby completing the installation of the entire air duct.

[0024] There are two layers of fireproof steel plates 1 between the two corner pieces 2.

[0025] In this embodiment, there are two slots 1 201 on one side of the corresponding corner piece 2, and similarly, there are two slots 2 303 on the back side of the guard plate 3. The two fireproof steel plates 1 are separated and not in contact by the two slots, and the air in the middle can effectively reduce the speed of heat transfer, making the air duct as a whole more heat-resistant and less likely to deform.

[0026] Among them, the width of slot one 201 and slot two 303 is the same as the thickness of the fireproof steel plate 1.

[0027] In this embodiment, the fireproof steel plate 1 can be directly inserted into slot one 201, and the protective plate 3 can be installed on the front and back of the fireproof steel plate 1 through slot two 303 and fixed with the fastening screws 5.

[0028] The corner pieces 2 and the guard plates 3 are chamfered at the four corners of the air duct, and the corner pieces 2 and the guard plates 3 are flush at the chamfers.

[0029] In this embodiment, the chamfer makes the transition of the entire air duct at the corners smoother and less prone to bumping, and the chamfer position fits better and is not abrupt.

[0030] Working principle: Both sides of the long sides of the fireproof steel plate 1 are inserted into the slots 201 on both sides of the corner pieces 2. Two fireproof steel plates 1 are inserted between the two corner pieces 2 and fixed by fastening screws 5. After forming a rectangle, the guard plate 3 is pasted on the front and back sides. The slot 2 303 of the guard plate 3 is inserted into the fireproof steel plate 2, and the mounting screws 4 are screwed into the pressure plate 302 at the center of the countersunk hole 301. The four guard plates 3 are fixed at the bottom through the mounting screw holes 203, and finally the entire rectangular air duct is installed.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] 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 rectangular fire-resistant air duct with a double-sided steel plate structure, comprising a fire-resistant steel plate (1), characterized in that: The fireproof steel plate (1) is provided with corner pieces (2) at the upper and lower parts, a slot one (201) is provided on one side of the corner piece (2), fastening screw holes (202) are provided at both ends of the slot one (201), mounting screw holes (203) are provided at both ends of the corner piece (2), a guard plate (3) is provided on the front and back sides of the fireproof steel plate (1), countersunk holes (301) are provided at both ends of the guard plate (3), a pressure plate (302) is provided inside the countersunk holes (301), a slot two (303) is provided on the back side of the guard plate (3), a mounting screw (4) is rotatably installed inside the mounting screw hole (203), and a fastening screw (5) is threadedly installed inside the fastening screw hole (202).

2. The rectangular fire-resistant air duct with double-sided steel plate structure according to claim 1, characterized in that: The fireproof steel plate (1) between the two corner pieces (2) has two layers in total.

3. The rectangular fire-resistant air duct with double-sided steel plate structure according to claim 1, characterized in that: The width of the slot one (201) and the slot two (303) is the same as the thickness of the fireproof steel plate (1).

4. The rectangular fire-resistant air duct with double-sided steel plate structure according to claim 1, characterized in that: The corner piece (2) and the guard plate (3) are provided with chamfers at the four corners of the air duct, and the corner piece (2) and the guard plate (3) are flush at the chamfers.

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