Composite floating bead fire-resistant air pipe with lining 1.0 double-sided steel plate structure

Abstract

The utility model discloses a composite floating bead fire-resistant air pipe with a lining 1.0 double-sided steel plate structure, which comprises an outer-layer steel plate, a middle interlayer and an inner-layer steel plate, mounting holes I are formed in two sides of the top of the outer-layer steel plate, mounting holes II are formed in two sides of the top of the inner-layer steel plate, and locking screws are mounted in the mounting holes I and the mounting holes II. Floating beads are mixed in the middle interlayer; according to the composite floating bead fire-resistant air pipe with the lining 1.0 double-face steel plate structure, the fixing screws penetrate through the fixing plate mounting holes in the front end to be fixedly installed with the other set of air pipes, the rigidity of the air pipes is ensured through the inner and outer metal air pipes, the heat-resistant and fire-resistant performance is improved through interlayer high-strength plastic, the pipe body strength is improved through mutual combination, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a composite perlite refractory air duct with a 1.0 double-sided steel plate structure on the inner lining. Background Art

[0002] An air duct is a duct system used for air transportation and distribution. There are two types: composite air ducts and inorganic air ducts. It can be classified according to the cross-sectional shape and material. According to the cross-sectional shape, the air duct can be divided into various types such as circular air ducts, rectangular air ducts, and oval air ducts. Among them, the circular air duct has the least resistance but the largest height dimension and is complex to manufacture. Therefore, rectangular air ducts are mainly used in applications. According to the material, the air duct can be divided into metal air ducts, composite air ducts, and polymer air ducts. For example, in the prior art: CN206478389U, a thermal insulation air duct, includes a wear-resistant layer, an outer polyethylene layer, and an inner polyethylene layer; the wear-resistant layer is arranged on the outside of the outer polyethylene layer; a steel wire frame is arranged on the inner wall of the outer polyethylene layer; an inner polyethylene layer is arranged inside the steel wire frame, and a vacuum layer is arranged between the inner polyethylene layer and the outer polyethylene layer, and the vacuum layers are independent of each other between the steel wire frames.

[0003] In addition, there is also the prior art:

[0004] CN213452389U, a flexible air duct;

[0005] CN213420314U, a refractory iron sheet air duct.

[0006] The air ducts mentioned in the above prior art are often of a single material. When the external environment is poor, the single-layer air duct is prone to deformation, resulting in a decline in the ventilation performance of the air duct itself and reducing the service life. Content of the Utility Model

[0007] The purpose of the utility model is to provide a composite perlite refractory air duct with a 1.0 double-sided steel plate structure on the inner lining to solve the problems raised in the above background art.

[0008] To achieve the above purpose, the utility model provides the following technical solution: A composite perlite refractory air duct with a 1.0 double-sided steel plate structure on the inner lining, including an outer steel plate, characterized in that: a middle interlayer is arranged inside the outer steel plate, an inner steel plate is arranged inside the middle interlayer, installation holes one are opened on both sides of the top of the outer steel plate, installation holes two are opened on both sides of the top of the inner steel plate, and locking screws are installed inside the installation holes one and the installation holes two.

[0009] Preferably, a backing plate is arranged at the joint between the outer steel plate and the outer steel plate.

[0010] Preferably, an upper insertion strip is arranged at the bottom of the outer steel plate, a lower insertion strip is arranged at the top of the inner steel plate, and insertion slots are opened at the top and bottom of the middle interlayer.

[0011] Preferably, the intermediate interlayer is made of polypropylene refractory material, and cenospheres are mixed inside the intermediate interlayer.

[0012] Preferably, a fixing plate is fixedly connected to the front section of the outer layer of the outer steel plate.

[0013] Preferably, an avoidance space is provided at the contact position of the second installation hole with the lower inserting strip.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. For the refractory air duct with a 1.0 double-sided steel plate structure and composite cenospheres in the lining, it is fixedly installed through the fixing screws passing through the installation holes of the fixing plate at the front end and another group of air ducts. The metal air ducts on the inner and outer sides ensure the rigidity of the air duct, and the high-strength plastic in the interlayer increases the heat and fire resistance performance. The combination of each other improves the strength of the pipe body and extends the service life.

[0016] 2. For the refractory air duct with a 1.0 double-sided steel plate structure and composite cenospheres in the lining, the three-layer structure is fixed to each other by inserting the inserting strip into the slot, and the two ends are locked by the backing plates, making the internal structure of the air duct stable and not easily deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

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

[0019] Figure 3 is Figure 2 the enlarged view at A shown;

[0020] Figure 4 is a schematic diagram of the inner steel plate of the structure of the present utility model.

[0021] In the figure: 1. Outer steel plate; 2. Intermediate interlayer; 3. Inner steel plate; 4. Backing plate; 5. Locking screw; 101. First installation hole; 102. Upper inserting strip; 103. Fixing plate; 201. Cenosphere; 202. Slot; 301. Lower inserting strip; 302. Second installation hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment: Please refer to Figure 1, the present utility model provides a technical solution: a refractory air duct with a 1.0 double-sided steel plate structure composite with cenospheres as the inner lining.

[0024] Among them, an intermediate sandwich layer 2 is arranged inside the outer steel plate 1, and an inner steel plate 3 is arranged inside the intermediate sandwich layer 2. Installation holes one 101 are opened on both sides at the top of the outer steel plate 1, and installation holes two 302 are opened on both sides at the top of the inner steel plate 3. Locking screws 5 are installed inside the installation holes one 101 and the installation holes two 302.

[0025] In this embodiment, the air duct is provided with three layers in total. The innermost inner steel plate 3 and the outermost outer steel plate 1 are both stainless steel plates made of metal. The intermediate sandwich layer 2 between the two steel plates is made of polypropylene material. After the three-layer structure is spliced, there is a 45° angle on the side, which is convenient for the pipe walls corresponding to four places to fit. Installation holes one 101 and installation holes two 302 are arranged on the inner and outer layers. The installation holes are perpendicular to the side, so that the center lines of the installation holes on the fitting pipe walls are exactly aligned and perpendicular, which is convenient for inserting the locking screws 5 for fixation. The two installation holes are generally located at the head and tail ends of the pipe wall, fitting the left and right sides. When the pipe wall is relatively long, multiple installation holes can be arranged in the middle.

[0026] Among them, a backing plate 4 is arranged at the joint of the outer steel plate 1 and the outer steel plate 1.

[0027] In this embodiment, the backing plate 4 is arranged at the pipe wall joint at the four corners of the air duct, and is attached through the locking screws 5 passing through the side of the pipe wall, enhancing the sealing performance at the joint of the pipe wall and the pipe wall.

[0028] Among them, an upper insertion strip 102 is arranged at the bottom of the outer steel plate 1, a lower insertion strip 301 is arranged at the top of the inner steel plate 3, and insertion slots 202 are opened at the top and bottom of the intermediate sandwich layer 2.

[0029] In this embodiment, the upper insertion strip 102 is inserted into the insertion slot 202 at the top of the intermediate sandwich layer 2, and the lower insertion strip 301 is inserted into the insertion slot 202 at the bottom of the intermediate sandwich layer 2, thereby fixing the three together.

[0030] Among them, the intermediate sandwich layer 2 is a polypropylene refractory material, and cenospheres 201 are mixed inside the intermediate sandwich layer 2.

[0031] In this embodiment, cenospheres are a kind of fly ash hollow spheres that can float on the water surface, with various characteristics such as fine particles, hollow, light weight, high strength, wear resistance, high temperature resistance, heat preservation and insulation, and insulation and flame retardance. They are one of the raw materials widely used in the refractory industry. By adding cenospheres during the polypropylene injection molding process, the refractory performance of polypropylene is greatly improved.

[0032] Among them, a fixing plate 103 is fixedly connected to the front section of the outer layer of the outer steel plate 1.

[0033] In this embodiment, screw through-holes are provided on the fixing plate 103. Screws are passed through and the fixing plates 103 at another location are attached to each other in pairs, so that the pipe walls are aligned to combine two sections of air ducts.

[0034] Among them, an avoidance space is provided at the contact position of the lower inserting strip 301 in the second mounting hole 302.

[0035] In this embodiment, when the second mounting hole 302 extends upward from the side position, it will touch the lower inserting strip 301 at the top. The lower inserting strip 301 in the corresponding area is cut off to facilitate the locking screw 5 to be placed into the corresponding second mounting hole 302.

[0036] Working principle: Take four inner steel plates 3, attach the edges with bevels and insert them into the backing plate 4. The second mounting holes 302 are aligned and the locking screws 5 are inserted through for fixation. Then, the middle sandwich layer 2 is inserted into the upper opening of the lower inserting strip 301. The bottom slots 202 on the middle sandwich layer 2 are embedded into the lower inserting strip 301. Finally, the outer steel plate 1 is installed above the middle sandwich layer 2. The upper inserting strip 102 of the outer steel plate 1 is inserted into the slots 202 at the top of the middle sandwich layer 2 for fixation. At the same time, the first mounting holes 101 are aligned and the locking screws 5 are inserted through for fixation. The front fixing plate 103 is aligned and installed with another group of air ducts.

[0037] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "set", "install", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. 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 with a 1.0 double-sided steel plate structure, comprising an outer steel plate (1), characterized in that: An intermediate layer (2) is arranged on the inner side of the outer steel plate (1), and an inner steel plate (3) is arranged on the inner side of the intermediate layer (2). Mounting holes (101) are provided on both sides of the top of the outer steel plate (1), and mounting holes (302) are provided on both sides of the top of the inner steel plate (3). Locking screws (5) are installed inside the mounting holes (101) and the mounting holes (302).

2. According to claim 1, a composite floating bead fire-resistant air duct with a 1.0 double-sided steel plate structure is lined, characterized in that: A backing plate (4) is provided at the joint between the outer steel plates (1) and the outer steel plates (1).

3. According to claim 1, a composite floating bead fire-resistant air duct with a 1.0 double-sided steel plate structure is lined, characterized in that: An upper inserting strip (102) is arranged at the bottom of the outer steel plate (1), a lower inserting strip (301) is arranged at the top of the inner steel plate (3), and slots (202) are provided at the top and bottom of the middle interlayer (2).

4. The composite floating bead fire-resistant air duct with a 1.0 double-sided steel plate structure as described in claim 1 is characterized by: The middle interlayer (2) is made of polypropylene refractory material, and floating beads (201) are mixed inside the middle interlayer (2).

5. According to claim 1, a composite floating bead fire-resistant air duct with a 1.0 double-sided steel plate structure is lined, characterized in that: The outer front section of the outer steel plate (1) is fixedly connected to a fixing plate (103).

6. The composite floating bead fire-resistant air duct with a 1.0 double-sided steel plate structure as described in claim 1 is characterized by: The second mounting hole (302) is provided with a gap at the contact position of the lower inserting strip (301).

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