Double-layer fire-resistant air pipe

Abstract

The double-layer fire-resistant air pipe comprises an air pipe outer pipe, an air pipe inner pipe, fireproof cotton and two sets of connecting frames, pipe openings are formed in the two ends of the air pipe outer pipe and the two ends of the air pipe inner pipe, first connecting parts and second connecting parts are arranged on the connecting frames, the first connecting parts are connected with the inner walls of the pipe openings of the air pipe inner pipe, and the second connecting parts are connected with the inner walls of the pipe openings of the air pipe inner pipe. The second connecting part is connected with the outer wall of a pipe opening of the air pipe outer pipe, the air pipe outer pipe is arranged outside the air pipe inner pipe in a sleeving mode, and the fireproof cotton is arranged between the outer wall of the air pipe inner pipe and the inner wall of the air pipe outer pipe. The double-layer air pipe has the beneficial effects that the problem that an air pipe inner pipe and an air pipe outer pipe of an existing double-layer air pipe are not convenient and fast to install can be solved, and the first connecting part and the second connecting part are fixedly connected with the inner wall of a pipe opening of the air pipe inner pipe and the outer wall of a pipe opening of the air pipe outer pipe correspondingly; therefore, the air pipe inner pipe and the air pipe outer pipe can be assembled only at the pipe openings at the two ends, the installation difficulty is simplified, and the use experience of a user and the competitiveness of a product are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of double-layer fire-resisting air pipe. BACKGROUND

[0002] The subway ventilation duct is one of the important components of the subway system, which is mainly used to discharge the dirty air in the subway tunnel, ensure the air circulation in the subway, improve the overall ventilation effect of the station and the vehicle, control the temperature and humidity of the subway station environment, so that passengers can travel in a comfortable environment, and improve the overall safety of the subway system. Subway ventilation duct can prevent fire and reduce the probability of accidents, providing safety for the subway system.

[0003] In order to improve the fire resistance of the air pipe, fireproof cotton is generally added to the air pipe. At present, a fireproof air pipe (Patent No. 202223032716.9) is disclosed on the market, which comprises an air pipe shell, a ventilation pipe and fireproof cotton. The ventilation pipe is connected to the inner wall of the air pipe shell through the connecting block provided on the upper end of the ventilation pipe. Since the connecting position is on the inner wall of the air pipe shell, the installation is not convenient, the user experience is not good, and the competitiveness of the product is not improved. UTILITY MODEL CONTENT

[0004] To solve the problems in the prior art, the utility model provides a double-layer fire-resisting air pipe, which solves the problem of inconvenient installation between the inner pipe and the outer pipe of the existing double-layer air pipe.

[0005] The utility model relates to a kind of double-layer fire-resisting air pipe, which comprises an air pipe shell, a ventilation pipe and fireproof cotton. The ventilation pipe is connected to the inner wall of the air pipe shell through the connecting block provided on the upper end of the ventilation pipe. Since the connecting position is on the inner wall of the air pipe shell, the installation is not convenient, the user experience is not good, and the competitiveness of the product is not improved.

[0006] The utility model makes further improvement, and the connecting frame comprises a fixed frame and a connecting frame. The first connecting part is a first connecting frame provided on the connecting frame, and the second connecting part is a second connecting frame provided on the connecting frame. The cross-sectional shape of the first connecting frame is the same as that of the pipe opening of the inner pipe, and the cross-sectional shape of the second connecting frame is the same as that of the pipe opening of the outer pipe.

[0007] The utility model makes further improvement, and the width of the connecting frame is slightly larger than the vertical distance between the outer wall of the inner pipe and the inner wall of the outer pipe. The connecting frame can seal the cavity between the inner pipe and the outer pipe.

[0008] The utility model further improves, the pipe orifice of air pipe outer tube and air pipe inner tube is rectangular in cross section shape, the connecting frame is formed by four connecting plates, and the connecting plate is respectively provided with inner fixed plate and outer fixed plate on both sides, the first connecting frame is formed by four inner fixed plates, and the second connecting frame is formed by four outer fixed plates.

[0009] The utility model further improves, and the inner fixed plate and outer fixed plate are perpendicular to the connecting plate, and the connecting plate is attached to the pipe orifice end surface of air pipe outer tube and air pipe inner tube.

[0010] The utility model further improves, and the inner fixed plate and outer fixed plate are integrally formed with the connecting plate.

[0011] The utility model further improves, and the first inner screw hole is set up on the inner fixed plate, the pipe orifice inner wall of air pipe inner tube is provided with the second inner screw hole that cooperates with the first inner screw hole, and the inner fixed plate can be fixed on the pipe orifice inner wall of air pipe inner tube through screw.

[0012] The utility model further improves, and the first outer screw hole is set up on the outer fixed plate, the pipe orifice outer wall of air pipe outer tube is provided with the second outer screw hole that cooperates with the first outer screw hole, and the outer fixed plate can be fixed on the pipe orifice outer wall of air pipe outer tube through screw.

[0013] The utility model further improves, and the mounting sleeve frame is fixedly sleeved on the periphery of the second connecting frame, and the connecting screw hole is set up on the connecting flap, and the fixed frame can be installed in the specified position through screw cooperation connecting screw hole.

[0014] The utility model further improves, and the air pipe inner tube inner wall is provided with fireproof coating.

[0015] Compared with the prior art, the utility model has the advantages that: the utility model provides a double-layer fire-resistant air pipe, which can effectively solve the problem of inconvenient installation between the air pipe inner tube and the air pipe outer tube of the existing double-layer air pipe. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the scheme of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 The whole structure schematic diagram of the double-layer fire-resistant air pipe of the present application;

[0018] Figure 2 The exploded structure schematic diagram of the double-layer fire-resistant air pipe of the present application. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the description and the claims of this application as well as the above-mentioned drawings in the specification of the present application, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion; the description and the claims of this application or the above-mentioned drawings, the terms "first", "second" and the like are used to distinguish different objects, not to describe a specific order.

[0020] In the present application, "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0021] In order to make those skilled in the art better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings.

[0022] As Figure 1 and Figure 2As shown, the utility model discloses a double -layer fire -resistant air pipe, including air pipe outer tube 1, air pipe inner tube 2, fire -retardant cotton (not drawn in the figure) and two groups of connecting frame, and the both ends of air pipe outer tube 1 and air pipe inner tube 2 are provided with the pipe orifice, and two groups of connecting frame are fixed at the both ends of air pipe outer tube 1, is provided with first connecting part and second connecting part on connecting frame, and first connecting part is connected with the pipe orifice inner wall of air pipe inner tube 2, and second connecting part is connected with the pipe orifice outer wall of air pipe outer tube 1, and air pipe outer tube 1 is set in air pipe inner tube 2 outside, and connecting frame can keep a certain distance between the outer wall of air pipe inner tube 2 and the inner wall of air pipe outer tube 1 by the cooperation of first connecting part and second connecting part, and fire -retardant cotton is arranged between the outer wall of air pipe inner tube 2 and the inner wall of air pipe outer tube 1.

[0023] Through the setting of first connecting part and second connecting part, the assembly between air pipe inner tube 2 and air pipe outer tube 1 only needs to be assembled at the pipe orifice of the both ends of air pipe outer tube 1 and air pipe inner tube 2, which simplifies the installation difficulty, improves the use experience of user and the competitiveness of product.

[0024] Connecting frame includes fixed frame 3 and connecting frame 4, first connecting part is the first connecting frame arranged on connecting frame 4, and second connecting part is the second connecting frame arranged on connecting frame 4, the cross-sectional shape of first connecting frame is same with the cross-sectional shape of the pipe orifice of air pipe inner tube 2, and the cross-sectional shape of second connecting frame is same with the cross-sectional shape of the pipe orifice of air pipe outer tube 1.

[0025] Through the shape of first connecting frame and second connecting frame being unified with the pipe orifice, first connecting frame and second connecting frame can be respectively adhered with the pipe orifice of air pipe inner tube 2 and the pipe orifice of air pipe outer tube 1, which improves the stability between air pipe outer tube 1 and air pipe inner tube 2.

[0026] The width of connecting frame 4 is slightly greater than the vertical distance between the outer wall of air pipe inner tube 2 and the inner wall of air pipe outer tube 1, and connecting frame 4 can seal the cavity between air pipe inner tube 2 and air pipe outer tube 1.

[0027] Through the setting of the size of connecting frame 4, the fire -retardant cotton can be effectively sealed between air pipe inner tube 2 and air pipe outer tube 1.

[0028] The cross-sectional shape of the pipe orifice of air pipe outer tube 1 and air pipe inner tube 2 is rectangular, connecting frame 4 is composed of four connecting plates 41, and inner fixed plate 42 and outer fixed plate 43 are respectively arranged on the two sides of connecting plate 41, first connecting frame is composed of four inner fixed plates 42, and second connecting frame is composed of four outer fixed plates 43.

[0029] Connecting plate 41 is composed of connecting frame 4, which can effectively reduce the processing difficulty and improve the processing efficiency, and through the setting of connecting plate 41, the pipe orifice of air pipe outer tube 1 and air pipe inner tube 2 can be effectively protected, so that the deformation is avoided under external impact.

[0030] The inner fixing plate 42 and the outer fixing plate 43 are arranged perpendicularly to the connecting plate 41, and the connecting plate 41 is arranged in close contact with the pipe opening end surface of the air pipe outer pipe 1 and the air pipe inner pipe 2.

[0031] By arranging the inner fixing plate 42 and the outer fixing plate 43 perpendicularly to the connecting plate 41, the inner fixing plate 42 is arranged in complete contact with the pipe opening inner wall of the air pipe inner pipe 2, the outer fixing plate 43 is arranged in complete contact with the pipe opening outer wall of the air pipe outer pipe 1, and the connecting plate 41 is arranged in close contact with the pipe opening end surface of the air pipe outer pipe 1 and the air pipe inner pipe 2, so that the connecting frame 4 is more stable when installed at both ends of the air pipe outer pipe 1.

[0032] The inner fixing plate 42 and the outer fixing plate 43 are integrally formed with the connecting plate 41, and the integral forming arrangement can further improve the stability between the inner fixing plate 42, the outer fixing plate 43 and the connecting plate 41.

[0033] The inner fixing plate 42 is provided with a first inner screw hole 421, the pipe opening inner wall of the air pipe inner pipe 2 is provided with a second inner screw hole 21 matched with the first inner screw hole 421, and the inner fixing plate 42 can be fixed on the pipe opening inner wall of the air pipe inner pipe 2 by screws.

[0034] The outer fixing plate 43 is provided with a first outer screw hole 431, the pipe opening outer wall of the air pipe outer pipe 1 is provided with a second outer screw hole 11 matched with the first outer screw hole 431, and the outer fixing plate 43 can be fixed on the pipe opening outer wall of the air pipe outer pipe 1 by screws.

[0035] The fixing frame 3 is provided with a mounting sleeve frame 31 and a connecting flap 32, the mounting sleeve frame 31 is provided with a sleeve screw hole 311, the mounting sleeve frame 31 is fixedly sleeved on the outer periphery of the second connecting frame, the connecting flap 32 is provided with a connecting screw hole 321, and the fixing frame 3 can be installed at a specified position by screwing the connecting screw hole 321.

[0036] The inner wall of the air pipe inner pipe 2 is provided with a fireproof coating, and the fireproof coating can further improve the fire resistance of the air pipe inner pipe 2.

[0037] As can be seen from the above, the mechanism can effectively solve the problem that the existing double-layer air pipe is not convenient to install between the air pipe inner pipe 2 and the air pipe outer pipe 1, the first connecting part and the second connecting part are arranged to be fixedly connected with the pipe opening inner wall of the air pipe inner pipe 2 and the pipe opening outer wall of the air pipe outer pipe 1 respectively, so that the assembly between the air pipe inner pipe 2 and the air pipe outer pipe 1 only needs to be assembled at the pipe openings at both ends of the air pipe outer pipe 1 and the air pipe inner pipe 2, thereby simplifying the installation difficulty and improving the user experience and the competitiveness of the product.

[0038] The above specific embodiments are preferred embodiments of the present application, and are not intended to limit the specific implementation range of the present application. The range of the present application includes but is not limited to the specific embodiments, and equivalent changes made in accordance with the present application are within the protection scope of the present application.

Claims

1. A double-layered refractory air duct, characterized by: The utility model provides a kind of fireproof duct, including wind pipe outer tube, wind pipe inner tube, fireproof cotton and two groups of connecting frames, the wind pipe outer tube and the wind pipe inner tube both ends are provided with pipe orifice, two groups of connecting frames are fixed in the wind pipe outer tube both ends, the connecting frame is provided with first connecting part and second connecting part, the first connecting part is connected with the pipe orifice inner wall of the wind pipe inner tube, the second connecting part is connected with the pipe orifice outer wall of the wind pipe outer tube, the wind pipe outer tube is set in the wind pipe inner tube outer, and the connecting frame can be by the cooperation of the first connecting part and second connecting part so that the wind pipe inner tube outer wall and the wind pipe outer tube inner wall keep a certain distance, the fireproof cotton is arranged between the wind pipe inner tube outer wall and the wind pipe outer tube inner wall.

2. The double skin fire resistant duct of claim 1, wherein: The connecting frame includes a fixed frame and a connecting frame, the first connecting part is a first connecting frame provided on the connecting frame, and the second connecting part is a second connecting frame provided on the connecting frame.

3. The double skin fire resistant duct of claim 2, wherein: The width of the connecting frame is slightly larger than the vertical distance between the wind pipe inner tube outer wall and the wind pipe outer tube inner wall, and the connecting frame can seal the cavity between the wind pipe inner tube and the wind pipe outer tube.

4. The double-ply refractory duct of claim 2, wherein: The cross-sectional shape of the pipe orifice of the wind pipe outer tube and the wind pipe inner tube is rectangular, the connecting frame is composed of four connecting plates, the connecting plates are provided with inner fixed plates and outer fixed plates on both sides respectively, the first connecting frame is composed of four inner fixed plates, and the second connecting frame is composed of four outer fixed plates.

5. The double skin fire resistant duct of claim 4, wherein: The inner fixed plates and the outer fixed plates are perpendicular to the connecting plates, and the connecting plates are arranged on the end surfaces of the pipe orifices of the wind pipe outer tube and the wind pipe inner tube.

6. The double skin fire resistant duct of claim 4, wherein: The inner fixed plates and the outer fixed plates are integrally formed with the connecting plates.

7. The double skin fire resistant duct of claim 4, wherein: The inner fixed plates are provided with first inner screw holes, the inner wall of the pipe orifice of the wind pipe inner tube is provided with second inner screw holes matched with the first inner screw holes, and the inner fixed plates can be fixed on the inner wall of the pipe orifice of the wind pipe inner tube by screws.

8. The double skin fire resistant duct of claim 4, wherein: The outer fixed plates are provided with first outer screw holes, the outer wall of the pipe orifice of the wind pipe outer tube is provided with second outer screw holes matched with the first outer screw holes, and the outer fixed plates can be fixed on the outer wall of the pipe orifice of the wind pipe outer tube by screws.

9. The double skin fire resistant duct of claim 4, wherein: The fixed frame is provided with a mounting sleeve frame and a connecting flap, the mounting sleeve frame is fixedly sleeved on the periphery of the second connecting frame, the connecting flap is provided with a connecting screw hole, and the fixed frame can be installed at a specified position by screwing the connecting screw hole.

10. Double skin fire resistant duct according to any of the claims 1-9, characterized in that: The inner wall of the wind pipe inner tube is provided with a fireproof coating.

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