Flue capable of preventing smoke leakage

Abstract

The utility model relates to the field of constructional engineering, in particular to a flue capable of preventing smoke leakage, a butt joint cavity is formed in a concrete base corresponding to a prefabricated flue in a matched mode, and a reserved cavity is formed in the position, above the butt joint cavity, of the concrete base; a reserved cavity is formed in the flue base, a lifting lug is arranged in the reserved cavity in a pouring mode, a plurality of positioning shelving blocks are installed on the lifting lug, the positioning shelving blocks are all matched with the prefabricated flue, and a micro-expansion waterproof mortar layer, a polymer cement-based waterproof coating layer and a concrete reverse ridge layer are sequentially built on the flue base. According to the utility model, the lifting lugs are combined with the positioning shelving blocks, so that the prefabricated flue is accurately positioned, gaps caused by installation deviation are reduced, and layered sealing integrates elastic sealing, rigid reinforcement, surface waterproofing and leakage path eradication through pouring of the polymer cement-based waterproof coating layer, and special materials are not needed; the method is low in cost and suitable for large-scale application.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a flue that prevents smoke leakage. Background Technology

[0002] Prefabricated flues are standardized flue components produced in factories. They are mainly used in kitchen exhaust and bathroom exhaust systems of residential and commercial buildings. They discharge fumes and exhaust gases to the outside through pipes, avoiding indoor air pollution.

[0003] Traditional precast flue installation typically involves hoisting the flue directly into the pre-reserved opening in the floor slab, followed by sealing the gaps with fine aggregate concrete using a formwork. Furthermore, current technology usually employs waterproof coatings or rubber gaskets for sealing, but this method has the following drawbacks:

[0004] 1. Gaps can easily form at the contact surface between the flue and the floor slab due to construction errors, leading to smoke leakage.

[0005] 2. The sealing material is prone to cracking after shrinkage or vibration, resulting in poor sealing performance.

[0006] 3. Lack of positioning reference during flue installation can easily lead to misalignment during later connections.

[0007] 4. High cost and insufficient durability. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by proposing a smoke-proof flue.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A smoke-proof flue includes a concrete base and a precast flue. The concrete base has a mating cavity adapted to the precast flue, and a reserved cavity is provided above the mating cavity. A cantilever is cast in the reserved cavity, and multiple positioning blocks are installed on the cantilever. The positioning blocks are adapted to the precast flue. A micro-expansion waterproof mortar layer, a polymer cement-based waterproof coating layer, and a concrete backrest layer are sequentially constructed on the flue base.

[0011] In addition, a preferred structure is that a flue base is fixedly provided at the bottom of the prefabricated flue, and positioning grooves are adapted to be opened on the corresponding positioning blocks on the flue base.

[0012] In addition, a preferred structure is that the height of the ear is 10mm greater than the bottom of the reserved cavity and 30mm less than the top of the reserved cavity.

[0013] Furthermore, in a preferred configuration, the outward width of the hook is 50mm, and the inner side of the hook is flush with the edge of the docking cavity.

[0014] Furthermore, in a preferred configuration, the micro-expansion waterproof mortar layer is directly poured onto the concrete base and the flue base, and the micro-expansion waterproof mortar layer fills two-thirds of the gap depth.

[0015] Furthermore, in a preferred configuration, the polymer cement-based waterproof coating layer is applied between the joint between the cantilever and the flue base, and the concrete backsplash layer is poured on top of the micro-expansion waterproof mortar layer.

[0016] The beneficial effects of this utility model are as follows: by combining the ear and the positioning support block, the prefabricated flue can be accurately positioned, reducing gaps caused by installation deviations. Furthermore, by pouring the polymer cement-based waterproof coating layer, the layered sealing can achieve both elastic sealing, rigid reinforcement and surface waterproofing, eliminating leakage paths. Moreover, no special materials are required, the cost is low, and it is suitable for large-scale application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a smoke duct to prevent smoke leakage according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of a flue lug for preventing smoke leakage proposed in this utility model;

[0019] In the diagram: 1 Concrete base, 11 Reserved cavity, 12 Butt joint cavity, 2 Cantilever lug, 21 Positioning support block, 3 Precast flue, 31 Flue base, 4 Micro-expansion waterproof mortar layer, 41 Concrete backrest layer, 42 Polymer cement-based waterproof coating layer. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-2 A smoke-proof flue includes a concrete base 1 and a precast flue 3. A mating cavity 12 is provided on the concrete base 1 to fit the precast flue 3, and a reserved cavity 11 is provided on the concrete base 1 above the mating cavity 12. A cantilever 2 is cast into the reserved cavity 11, and multiple positioning blocks 21 are installed on the cantilever 2. All positioning blocks 21 are adapted to the precast flue 3. A micro-expansion waterproof mortar layer 4, a polymer cement-based waterproof coating layer 42, and a concrete retaining wall layer 41 are sequentially constructed on the flue base 31.

[0022] The prefabricated flue 3 has a flue base 31 fixedly installed at its bottom, and each flue base 31 has a corresponding positioning groove provided on the positioning support block 21. The fitting arrangement between the positioning support block 21 and the positioning groove makes it easy for the user to position and install the flue base 31 on the positioning support block 21.

[0023] The height of the hook 2 is 10mm greater than the bottom of the reserved cavity 11 and 30mm less than the top of the reserved cavity 11. The outward width of the hook 2 is 50mm, and the inner side of the hook 2 is flush with the edge of the docking cavity 12. By limiting the size of the hook 2, cracks are less likely to occur during the subsequent filling process.

[0024] Among them, the micro-expansion waterproof mortar layer 4 is directly poured on the concrete base 1 and the flue base 31, and the micro-expansion waterproof mortar layer 4 fills two-thirds of the gap depth.

[0025] A polymer cement-based waterproof coating layer 42 is applied between the lug 2 and the flue base 31, and a concrete retaining wall layer 41 is poured on top of the micro-expansion waterproof mortar layer 4. The polymer cement-based waterproof coating layer 42, formed by applying the polymer cement-based waterproof coating, possesses elastic sealing properties. This allows the layered sealing to achieve both elastic sealing, rigid reinforcement, and surface waterproofing, thus eliminating leakage paths.

[0026] In this embodiment, a concrete base 1 is first poured, and a connecting cavity 12 and a reserved cavity 11 are reserved in the concrete base 1. Then, a cantilever 2 is poured into the reserved cavity 11 using concrete. It is worth noting that the reserved cavity 11 is annular, and the cantilever 2 is poured around the perimeter of the reserved cavity 11. The cantilever 2 is rectangular. The cantilever is 10mm higher than the bottom of the floor slab and 30mm lower than the top of the floor slab, with an outward cantilever width of approximately 50mm, and its inner side is flush with the edge of the opening.

[0027] The installation of the prefabricated flue 3 then begins. The user simply needs to fix the prefabricated positioning support block 21 onto the cantilever lug 2. The prefabricated flue 3 is then hoisted into the reserved cavity 11, ensuring that the positioning cavity on the flue base 31 is properly aligned with the positioning support block 21. Finally, the verticality is calibrated using a laser positioning instrument.

[0028] Finally, the layered sealing stage begins. First, the first layer is filled with micro-expansion waterproof mortar to 2 / 3 of the gap depth to form micro-expansion waterproof mortar layer 4.

[0029] The second layer is a polymer cement-based waterproof coating applied between the lug 2 and the flue base 31 to form a polymer cement-based waterproof coating layer 42, which has elastic sealing properties. This layered sealing provides elastic sealing, rigid reinforcement, and surface waterproofing to eliminate leakage paths.

[0030] The outermost concrete backsplash layer 41 is poured on top of the micro-expansion waterproof mortar layer 4, and it is constructed simultaneously with the floor slab finishing layer to ensure overall flatness.

[0031] In this invention, by combining the ear 2 with the positioning support block 21, the prefabricated flue 3 can be accurately positioned, reducing gaps caused by installation deviations. Furthermore, by pouring the polymer cement-based waterproof coating layer 42, the layered sealing can achieve both elastic sealing, rigid reinforcement, and surface waterproofing, eliminating leakage paths. Moreover, no special materials are required, resulting in lower costs and suitability for large-scale applications.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flue for preventing the escape of smoke, comprising a concrete base (1) and a prefabricated flue (3), characterised in that, The concrete base (1) is provided with a docking cavity (12) adapted to the prefabricated flue (3), and a reserved cavity (11) is provided on the concrete base (1) above the docking cavity (12). The reserved cavity (11) is filled with a cantilever (2), and multiple positioning blocks (21) are installed on the cantilever (2). The positioning blocks (21) are all adapted to the prefabricated flue (3). The flue base (31) is constructed in sequence with a micro-expansion waterproof mortar layer (4), a polymer cement-based waterproof coating layer (42), and a concrete backrest layer (41).

2. A flue to prevent smoke leakage according to claim 1, wherein The bottom of the prefabricated flue (3) is fixedly provided with a flue base (31), and the corresponding positioning support block (21) on the flue base (31) is provided with a positioning groove.

3. A flue to prevent smoke leakage according to claim 1, wherein The height of the ear (2) is 10 mm greater than the bottom of the reserved cavity (11) and 30 mm less than the top of the reserved cavity (11).

4. A smoke-proof flue according to claim 3, characterized in that, The outer width of the hook (2) is 50mm, and the inner side of the hook (2) is flush with the edge of the docking cavity (12).

5. A flue to prevent smoke leakage according to claim 1, wherein The micro-expansion waterproof mortar layer (4) is directly poured onto the concrete base (1) and the flue base (31), and the micro-expansion waterproof mortar layer (4) fills two-thirds of the gap depth.

6. A flue to prevent flue gas leakage according to claim 5, wherein The polymer cement-based waterproof coating layer (42) is applied between the gap between the ear (2) and the flue base (31), and the concrete backrest layer (41) is poured on top of the micro-expansion waterproof mortar layer (4).

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