Heat-insulation fire-resistant air pipe

Abstract

The utility model relates to a heat-insulating fire-resistant air pipe which is surrounded by pipe plates and is characterized in that each pipe plate comprises a first fireproof layer, a first heat-insulating layer, a middle reinforcing layer, a second heat-insulating layer and a second fireproof layer which are sequentially compounded from inside to outside; the first fireproof layer and the second fireproof layer are high-temperature fireproof cement layers, the middle reinforcing layer is an inorganic material layer, and the first heat insulation layer and the second heat insulation layer are mineral surface material layers. The air pipe is simple in structure, light in weight and high in strength, and stable and safe use can be ensured by integrating environmental factors.

Description

Technical Field

[0001] The utility model relates to an air duct, in particular to a heat-insulating and fire-resistant air duct. Background Art

[0002] With the development of air duct technology, high-temperature environments are placing greater demands on ducts for lightweight, efficient insulation, and fire resistance. Existing ducts typically use insulation material between the inner and outer panels. Damage to either the inner or outer panel significantly impacts the overall insulation and fire resistance, accelerating structural degradation and dramatically reducing service life. Furthermore, environmental factors differ between the inside and outside of the duct, leading to varying degrees of heat conduction, humidity, and noise levels within the insulation material. This can easily lead to deformation or degradation of the insulation material, compromising performance. Summary of the Invention

[0003] The utility model provides a heat-insulating and fire-resistant air duct which has a simple structure and can comprehensively consider environmental factors to ensure stable and safe use.

[0004] The technical solution adopted by the utility model is: an insulated and fire-resistant air duct, which is surrounded by a tube plate, and is characterized in that: the tube plate includes a first fireproof layer, a first thermal insulation layer, an intermediate reinforcement layer, a second thermal insulation layer and a second fireproof layer, and the first fireproof layer, the first thermal insulation layer, the intermediate reinforcement layer, the second thermal insulation layer and the second fireproof layer are compounded in sequence from the inside to the outside, the first and second fireproof layers are high-temperature refractory cement layers, the intermediate reinforcement layer is an inorganic material layer, and the first and second thermal insulation layers are mineral surface material layers.

[0005] The middle reinforcement layer is a high-temperature refractory cement layer.

[0006] The middle reinforcement layer is a lightweight cement fiber board.

[0007] The first and second fireproof layers are lightweight cement fiber boards.

[0008] The first and second heat insulation layers are rock wool, glass wool, ceramic fiber wool or aluminum silicate fiber wool.

[0009] The first thermal insulation layer is rock wool or glass wool, and the second thermal insulation layer is ceramic fiber wool or aluminum silicate fiber wool.

[0010] The first and second heat-insulating layers are provided with connecting holes which pass through from top to bottom, and high-temperature refractory cement is integrally poured into the connecting holes to form the first fireproof layer, the middle heating layer and the second fireproof layer.

[0011] The communicating holes provided on the first and second heat-insulating layers are arranged in a rectangular array and are staggered with each other.

[0012] By adopting the above technical solution, the beneficial effects of the utility model are:

[0013] 1. The structure of the first fireproof layer, the middle reinforcement layer and the second fireproof layer is adopted. On the basis of ensuring light fireproof and sufficient strength, it further prevents the damage of the inner and outer second and first fireproof layers from affecting the internal insulation layer and the outer and inner fireproof layers, which is beneficial to prolonging the service life.

[0014] 2. The first and second insulation layers are set separately. The use of rock wool or glass wool can better cope with the high temperature, humidity and noise of the external natural temperature. The use of ceramic fiber wool or aluminum silicate fiber wool can better cope with the high temperature and chemical corrosion resistance required for internal air supply. Even if there is slight damage to the internal fireproof layer, the impact on the second insulation layer is extremely low, which comprehensively ensures the applicability and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the first embodiment of the present utility model;

[0016] Figure 2 This is a structural diagram of the second embodiment of the present utility model.

[0017] In the figure: a first high-temperature refractory cement layer 1, a second high-temperature refractory cement layer 2, a lightweight cement fiber board 3, a rock wool insulation layer 4, an aluminum silicate fiber wool insulation layer 5, a connecting hole 6, and a support column 7. DETAILED DESCRIPTION

[0018] The following is further described with reference to the accompanying drawings and examples.

[0019] Figure 1 The first embodiment shown is an insulated refractory air duct, which is connected by a tube sheet. The tube sheet is composed of a first high-temperature refractory cement layer 1, a rock wool insulation layer 4, a lightweight cement fiber board 3, an aluminum silicate fiber wool insulation layer 5, and a second high-temperature refractory cement layer 2 from the inside to the outside.

[0020] Figure 2 The second embodiment shown is an insulated refractory air duct, which differs from the first embodiment in that a plurality of support columns 7 are integrally formed upward and downward on the lightweight cement fiber board 3, and are evenly distributed in an array and staggered with each other. The support columns 7 are respectively connected to the connecting holes 6 of the rock wool insulation layer 4 and the aluminum silicate fiber wool insulation layer 5 upward and downward, and are respectively connected to support the first high-temperature refractory cement layer 1 and the second high-temperature refractory cement layer 2 upward and downward.

[0021] In the second embodiment, the support column can also be formed by connecting the first and second high-temperature refractory cement layers 1 and 2 inwardly and tightly connecting the lightweight cement fiber board 3.

Claims

1. A heat-insulating fire-resistant air duct, connected by tube sheets, characterized by: The tube sheet includes a first fireproof layer, a first thermal insulation layer, an intermediate reinforcement layer, a second thermal insulation layer and a second fireproof layer. The first fireproof layer, the first thermal insulation layer, the intermediate reinforcement layer, the second thermal insulation layer and the second fireproof layer are compounded in sequence from the inside to the outside. The first and second fireproof layers are high-temperature refractory cement layers, the intermediate reinforcement layer is an inorganic material layer, and the first and second thermal insulation layers are mineral surface material layers.

2. The heat-insulating fire-resistant air duct according to claim 1, characterized in that: The middle reinforcement layer is a high-temperature refractory cement layer.

3. The heat-insulating fire-resistant air duct according to claim 1 or 2, characterized in that: The middle reinforcement layer is a lightweight cement fiber board.

4. The heat-insulating fire-resistant air duct according to claim 1, characterized in that: The first and second fireproof layers are lightweight cement fiber boards.

5. The heat-insulating fire-resistant air duct according to claim 1, characterized in that: The first and second heat insulation layers are rock wool, glass wool, ceramic fiber wool or aluminum silicate fiber wool.

6. The heat-insulating fire-resistant air duct according to claim 1 or 5, characterized in that: The first thermal insulation layer is rock wool or glass wool, and the second thermal insulation layer is ceramic fiber wool or aluminum silicate fiber wool.

7. The heat-insulating fire-resistant air duct according to claim 1, characterized in that: The first and second heat-insulating layers are provided with connecting holes which pass through from top to bottom, and high-temperature refractory cement is integrally poured into the connecting holes to form the first fireproof layer, the middle heating layer and the second fireproof layer.

8. The heat-insulating fire-resistant air duct according to claim 7, characterized in that: The communicating holes provided on the first and second heat-insulating layers are arranged in a rectangular array and are staggered with each other.

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