Composite floating bead fire-resistant air pipe with 0.75 lining double-sided steel plate structure

Abstract

The utility model discloses a lining 0.75 double-face steel plate structure composite floating bead fire-resistant air pipe which comprises an outer layer pipe and an inner layer pipe, connecting corners are arranged on the two sides of the outer layer pipe and the two sides of the inner layer pipe, and a lining pipe is arranged on the inner side of the inner layer pipe. According to the composite floating bead fire-resistant air pipe lined with the 0.75 double-sided steel plate structure, the lining pipe is additionally attached to the inner side of the inner-layer pipe, the lining pipe is tightly attached to the surface of the inner-layer pipe, and the contact between the pipe wall and substances in the air pipe is replaced and protected, so that the abrasion of the inner-layer pipe is reduced, the lining pipe is convenient to replace, and the overall cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a fire-resistant air duct with a composite floating bead structure lined with 0.75 double-sided steel plates. Background Art

[0002] Air ducts are piping systems used for air transportation and distribution. There are two types: composite air ducts and inorganic air ducts. They can be classified according to cross-sectional shape and material. According to cross-sectional shape, air ducts can be divided into circular air ducts, rectangular air ducts, oblate air ducts and many other types. Among them, circular air ducts have the smallest resistance but the largest height dimension and are complex to make. Therefore, rectangular air ducts are mainly used. According to material, air ducts can be divided into metal air ducts, composite air ducts, and polymer air ducts. For example, the existing technology: CN206478389U, an insulated air duct, comprising a wear-resistant layer, an outer polyethylene layer and an inner polyethylene layer; the wear-resistant layer is provided on the outside of the outer polyethylene layer; a steel wire rack is provided on the inner wall of the outer polyethylene layer; an inner polyethylene layer is provided on the inner side of the steel wire rack, and a vacuum layer is provided between the inner polyethylene layer and the outer polyethylene layer, and the vacuum layers are independent of each other between the steel wire racks.

[0003] There is also existing technology:

[0004] CN213452389U, a flexible air duct;

[0005] CN213420314U, a kind of fire-resistant iron sheet air duct.

[0006] Most of the air ducts mentioned in the above-mentioned prior art do not have a lining structure. After long-term use, the pipe wall is corroded and damaged, and the pipe body has to be replaced. The lining can be added by fitting it to the pipe wall to replace and protect the pipe wall, and the lining replacement is also relatively convenient. Utility Model Content

[0007] The purpose of the utility model is to provide a composite floating bead fire-resistant air duct lined with 0.75 double-sided steel plate structure to solve the problems raised in the above background technology.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite floating bead fire-resistant air duct with a 0.75 double-sided steel plate structure lined on the inner layer, comprising an outer layer tube and an inner layer tube, characterized in that: the outer layer tube and the inner layer tube are provided with mounting holes vertically passing through near both sides, fastening screws are provided inside the mounting holes, connecting angles are provided on both sides of the outer layer tube and the inner layer tube, and a buckle is fixedly connected to one side of the connecting angle and the bottom, and a slot is provided on the outer layer tube at the corresponding position of the buckle.

[0009] Preferably, an inner lining tube is provided inside the inner tube, and the wall thickness of the inner lining tube is 0.7 mm.

[0010] Preferably, a gasket strip is provided between the outer tube and the inner tube near the center, and a gasket is provided between the outer tube and the inner tube near the edge.

[0011] Preferably, the interior of the pad is filled with floating beads.

[0012] Preferably, a partition is provided between the pads.

[0013] Preferably, a blocking block is provided at the inner opening of the mounting hole.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The composite floating bead fire-resistant air duct with 0.75 double-sided steel plate structure is lined with an inner lining pipe fitted on the inner side of the inner pipe. The inner lining pipe fits tightly to the surface of the inner pipe, replacing and protecting the contact between the pipe wall and the material in the air duct, thereby reducing the wear of the inner pipe. The replacement of the inner lining pipe is also more convenient, reducing the overall cost.

[0016] 2. The 0.75 double-sided steel plate-lined composite floating bead fire-resistant air duct has a pipe wall formed by stacking inner and outer pipes. Pads and gaskets are used at the joints to reduce vibration and collision and extrusion caused by shrinkage and expansion, thereby improving the overall service life of the air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 3 for Figure 2 An enlarged view of point A is shown.

[0020] In the figure: 1. Outer tube; 2. Inner tube; 3. Connecting angle; 4. Gasket; 5. Inner lining tube; 6. Fastening screw; 7. Partition; 8. Gasket; 9. Block; 10. Buckle; 11. Floating beads. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example: See Figure 1 The utility model provides a technical solution: a composite floating bead fire-resistant air duct lined with 0.75 double-sided steel plate structure.

[0023] Among them, the outer tube 1 and the inner tube 2 are provided with mounting holes vertically passing through near both sides, and fastening screws 6 are provided inside the mounting holes. Connecting angles 3 are provided on both sides of the outer tube 1 and the inner tube 2. A clip 10 is fixedly connected to one side of the connecting angle 3 and the bottom, and a slot is provided on the outer tube 1 at the position corresponding to the clip 10.

[0024] In this embodiment, the two clips 10 at the connecting corners 3 are respectively inserted into the corresponding slots of the outer tube 1 to connect the two vertical outer tubes 1. The outer tube 1 is provided with an inner tube 2 toward the center of the air duct. The mounting holes of the two are aligned and fastened with the fastening screws 6, so that the air duct has a two-layer tube wall combination of the outer tube 1 and the inner tube 2.

[0025] Among them, an inner lining tube 5 is provided inside the inner tube 2, and the wall thickness of the inner lining tube 5 is 0.7 mm.

[0026] In this embodiment, the inner lining tube 5 fits tightly to the surface of the inner tube 2, replacing and protecting the contact between the tube wall and the material in the air duct, thereby reducing the wear of the inner tube. The replacement of the inner lining tube is also relatively convenient, reducing the overall cost. 0.7mm is also a common tube wall thickness, with low procurement cost, and is suitable for batch use.

[0027] A cushion strip 4 is provided between the outer tube 1 and the inner tube 2 near the center, and a gasket 8 is provided between the outer tube 1 and the inner tube 2 near the edge.

[0028] In this embodiment, the pads 4 and the gaskets 8 are both made of polypropylene. The inner and outer metal ducts ensure the rigidity of the ducts, and the high-strength plastic at the joints increases the heat and fire resistance. The combination of the two improves the strength of the pipe body and increases the service life. The filling between the outer tube 1 and the inner tube 2 reduces the deformation influence between the two when they are deformed due to environmental changes, thereby effectively reducing the deformation of the entire pipeline.

[0029] The interior of the cushion strip 4 is filled with floating beads 11 .

[0030] In this embodiment, the floating beads are hollow balls of fly ash that can float on the water surface. They have many characteristics such as fine particles, hollowness, light weight, high strength, wear resistance, high temperature resistance, thermal insulation, and flame retardancy. They are one of the raw materials widely used in the refractory industry. By adding floating beads during the polypropylene injection molding process, the fire resistance of polypropylene is greatly improved.

[0031] Partition plates 7 are provided between the gasket strips 4 .

[0032] In this embodiment, half of the partition 7 is connected to the bottom of the outer tube 1 and is generally connected to the top of the inner tube 2, and they are staggered with each other. Some deformation gaps are reserved between the other end of the partition 7 and the corresponding tube wall to prevent the outer tube 1 and the inner tube 2 from squeezing each other. Multiple partitions 7 isolate each gasket 4 to prevent the gasket 4 from running off the track. The gasket 8 and the gasket 4 are the same on the left and right and are fixed in corresponding positions to reduce the collision damage between the outer tube 1 and the inner tube 2.

[0033] Wherein, a blocking block 9 is provided at the inner opening of the mounting hole.

[0034] In this embodiment, the block 9 is used to block the mounting hole at the bottom of the inner tube 2, so that the contact surface between the inner tube 2 and the inner liner tube 5 is smooth, thereby reducing the deformation of the inner liner tube 5.

[0035] Working principle: The outer tube 1 and the inner tube 2 are fitted together, and the gasket 4 and the gasket 8 are inserted into the gap, and fixed by passing the fastening screws 6. The two clips 10 at the connecting angles 3 are respectively inserted into the corresponding slots of the outer tube 1 to connect the two vertical outer tubes 1, thereby forming the four pipe walls of the air duct, and the block 9 is inserted into the installation hole on the inner wall of the inner tube 2 to fill the gap, and finally filled in the inner lining tube 5 to protect the pipe wall.

[0036] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite floating bead fire-resistant air duct lined with 0.75 double-sided steel plate structure, comprising an outer layer tube (1) and an inner layer tube (2), characterized in that: The outer tube (1) and the inner tube (2) are provided with mounting holes vertically passing through near both sides, and fastening screws (6) are provided inside the mounting holes. Connection angles (3) are provided on both sides of the outer tube (1) and the inner tube (2), and a buckle (10) is fixedly connected to one side and the bottom of the connection angle (3). The outer tube (1) is provided with a slot at a position corresponding to the buckle (10).

2. The composite floating bead fire-resistant air duct with a 0.75 double-sided steel plate structure as described in claim 1 is characterized by: An inner lining tube (5) is provided inside the inner layer tube (2), and the wall thickness of the inner lining tube (5) is 0.7 mm.

3. The composite floating bead fire-resistant air duct with a 0.75 double-sided steel plate structure as lined according to claim 1 is characterized by: A gasket strip (4) is provided between the outer tube (1) and the inner tube (2) near the center, and a gasket (8) is provided between the outer tube (1) and the inner tube (2) near the edge.

4. The composite floating bead fire-resistant air duct with a 0.75 double-sided steel plate structure as claimed in claim 3 is characterized by: The interior of the cushion strip (4) is filled with floating beads (11).

5. The composite floating bead fire-resistant air duct with a 0.75 double-sided steel plate structure as lined according to claim 3 is characterized by: A partition (7) is provided between the pad strips (4).

6. The composite floating bead fire-resistant air duct with a 0.75 double-sided steel plate structure as lined according to claim 1 is characterized by: A blocking block (9) is provided at the inner opening of the mounting hole.

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