Fire-fighting smoke exhaust air pipe

Abstract

The utility model belongs to the technical field of air pipes, and discloses a fire-fighting smoke exhaust air pipe which comprises an outer pipe and an inner pipe, the inner pipe is connected to the inner side of the outer pipe in a sliding mode, a fixing groove is formed in the inner side of one end of the outer pipe, positioning blocks are symmetrically arranged on the inner wall of the fixing groove, a fixing ring is arranged on the outer side of one end of the inner pipe, and the positioning blocks are symmetrically arranged on the inner wall of the fixing groove. The fixing ring is slidably embedded in the fixing groove, positioning grooves are symmetrically formed in the periphery of the fixing ring and slidably connected to the outer side of the positioning block in a sleeving mode, a limiting ring is fixedly connected to the inner side of the other end of the outer pipe, and a limiting groove is formed in the outer side of the other end of the inner pipe; the connecting pipe has the advantages of being reliable in structure, tight in connection and resistant to corrosion and high temperature, the inner pipe is assembled in the mode that the inner pipe is clamped to the inner side of the outer pipe in a sliding mode, the inner pipe can be directly pulled out of the outer pipe, the connecting pipe can be conveniently and rapidly disassembled, assembled and replaced, and the assembling and disassembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a fire smoke exhaust air duct. Background Art

[0002] The air duct can be used in fire smoke exhaust. In the fire smoke exhaust, the air duct can transport the smoke and transport the smoke to the outside for smoke exhaust treatment. After long-term use, the inner wall of the air duct is easily corroded by sulfur dioxide in the smoke. Long-term corrosion can easily cause damage to the air duct, and the damaged air duct needs to be replaced in time. In the prior art, as disclosed in patent CN218152874U, a double-layer galvanized sheet fire smoke exhaust air duct is disclosed, including an air duct assembly, the air duct assembly includes an outer air duct and an inner air duct installed on the inner wall of the outer air duct, and the inner air duct is installed in the outer air duct through the inner air duct thread. The inner air duct can be directly rotated to remove the damaged inner air duct from the outer air duct and replace it with a new inner air duct. However, its structure is not perfect. After long-term use, the threads between the inner air duct and the outer air duct are easily rusted and damaged, resulting in laborious removal of the inner air duct, reducing the efficiency of installation and disassembly, and the overall protection is low, and it is easily eroded by high-temperature smoke, which reduces the service life.

[0003] Therefore, the utility model designs a fire smoke exhaust duct to solve the above problems. Utility Model Content

[0004] In order to solve the above-mentioned problems in the prior art, the utility model provides a fire smoke exhaust duct, which has a reliable structure, tight connection, and the characteristics of corrosion resistance and high temperature resistance. It is assembled by sliding the inner tube onto the inner side of the outer tube, which is convenient for quick disassembly and replacement, thereby improving the efficiency of installation and disassembly.

[0005] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0006] A fire smoke exhaust duct comprises an outer tube and an inner tube, and the inner tube is slidably connected to the inner side of the outer tube, a fixing groove is provided on the inner side of one end of the outer tube, and a positioning block is symmetrically provided on the inner wall of the fixing groove, a fixing ring is provided on the outer side of one end of the inner tube, and the fixing ring is slidably embedded in the fixing groove, and positioning grooves are symmetrically provided on the outer periphery of the fixing ring, and the positioning grooves are slidably sleeved on the outer side of the positioning block, a limiting ring is fixedly connected to the inner side of the other end of the outer tube, a limiting groove is provided on the outer side of the other end of the inner tube, and the other end of the outer tube abuts against the inner side of the limiting groove through the limiting ring, and a plurality of protective plates are fixedly connected to the outer peripheral surface of the outer tube, and the protective plates are arranged at equal intervals in the length direction of the outer tube.

[0007] Preferably, connecting flanges are provided at both ends of the outer circumference of the outer tube, one side of the connecting flange is fixedly connected to an annular pressure plate by bolts, and the annular pressure plate is pressed tightly against the end surface of the inner tube close to the fixing ring.

[0008] Preferably, the outer diameter of the annular pressure plate is the same as the outer diameter of the connecting flange, and the inner diameter of the annular pressure plate is the same as the inner diameter of the inner tube.

[0009] Preferably, both side surfaces of the annular pressure plate are connected with sealing gaskets, and the sealing gaskets are high temperature resistant sealing gaskets.

[0010] Preferably, the protective plate is connected around the outer tube, and rib plates are evenly connected between two sides of the protective plate and the outer wall of the outer tube.

[0011] Preferably, the inner wall of the inner tube is uniformly coated with a corrosion-resistant and high-temperature-resistant coating.

[0012] Preferably, the side surface of the fixing ring is flush with the end surface of the inner tube, and the side surface of the limiting ring is flush with the end surface of the outer tube.

[0013] The utility model provides a fire smoke exhaust duct, which has the following beneficial effects:

[0014] (1) Through the fixing grooves and limiting rings at both ends of the outer tube, and the fixing rings and limiting grooves corresponding to the ends of the inner tube, the inner tube can be slidably inserted into the inner side of the outer tube, and the inner tube can be restricted in the length direction of the air duct. Through the cooperation of the positioning block in the fixing groove and the positioning groove on the fixing ring, the inner tube can be positioned in the circumferential direction of the air duct. Therefore, when the air ducts are connected by connecting flanges, the inner tube can be fixed on the inner side of the outer tube. When the inner tube needs to be replaced, the inner tube can be directly pulled out from the outer tube, thereby improving the efficiency of disassembly and replacement;

[0015] (2) The inner tube can be fixed to the inner side of the outer tube by the annular pressure plate, preventing the inner tube from sliding out from the inner side of the outer tube during transportation. When connecting two air ducts, the tightness and firmness of the connection can be improved. The protective plate can reinforce the structural strength of the outer tube and improve the protection of the outer tube. The inner wall of the inner tube is coated with a corrosion-resistant and high-temperature resistant coating, which can reduce the erosion of the inner tube by high-temperature flue gas and increase its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a vertical cross-sectional schematic diagram of the entire utility model along the axis;

[0018] Figure 3It is a cross-sectional schematic diagram of the connection between two air ducts of the utility model;

[0019] Figure 4 This is a schematic diagram of the end structure of the outer tube and the inner tube matching each other in the utility model;

[0020] Figure 5 It is a schematic diagram of the other end structure of the outer tube and the inner tube matching each other in the utility model.

[0021] In the figure: 1. outer tube; 11. fixing groove; 12. positioning block; 13. limiting ring; 2. inner tube; 21. fixing ring; 22. positioning groove; 23. limiting groove; 24. corrosion-resistant and high-temperature resistant coating; 3. protective plate; 31. rib plate; 4. connecting flange; 5. annular pressure plate; 51. sealing gasket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0023] like Figure 1-Figure 5 As shown, the utility model provides a fire smoke exhaust duct, comprising an outer tube 1 and an inner tube 2, and the inner tube 2 is slidably connected to the inner side of the outer tube 1, a fixing groove 11 is provided on the inner side of one end of the outer tube 1, and a positioning block 12 is symmetrically provided on the inner wall of the fixing groove 11, a fixing ring 21 is provided on the outer side of one end of the inner tube 2, and the fixing ring 21 is slidably embedded in the fixing groove 11, and a positioning groove 22 is symmetrically provided on the outer periphery of the fixing ring 21, and the positioning groove 22 is slidably sleeved on the outer side of the positioning block 12, a limiting ring 13 is fixedly connected to the inner side of the other end of the outer tube 1, a limiting groove 23 is provided on the outer side of the other end of the inner tube 2, and the other end of the outer tube 1 is abutted against the inner side of the limiting groove 23 through the limiting ring 13, and a plurality of protective plates 3 are fixedly connected to the outer peripheral surface of the outer tube 1, and the protective plates 3 are arranged at equal intervals in the length direction of the outer tube 1.

[0024] Furthermore, the inner wall of the inner tube 2 is uniformly coated with a corrosion-resistant and high-temperature resistant coating 24. The corrosion-resistant and high-temperature resistant coating 24 can be made of epoxy phenolic paint or inorganic zinc-rich primer, which can reduce the erosion of the inner tube 2 by high-temperature flue gas and improve its service life.

[0025] It should be noted that the side surface of the fixing ring 21 is flush with the end surface of the inner tube 2, and the side surface of the limiting ring 13 is flush with the end surface of the outer tube 1, so that the two end surfaces of the air duct are flush, so that the two air ducts are tightly connected.

[0026] In this embodiment: when assembling the air duct, the end of the inner tube 2 provided with the limiting groove 23 is slidably inserted into the inner side of the outer tube 1 from the end of the outer tube 1 provided with the fixing groove 11, so that the limiting groove 23 is slidably engaged with the limiting ring 13, and at the same time, the fixing ring 21 at the other end of the inner tube 2 is slidably connected in the fixing groove 11 at the end of the outer tube 1, and the positioning groove 22 on the fixing ring 21 is engaged with the positioning block 12, so that the inner tube 2 can be positioned in the circumferential direction of the air duct, and when the two air ducts are connected, the inner tube 2 can be positioned in the length direction of the air duct. It is pressed and fixed, so that when the air ducts are connected by the connecting flange 4, the inner tube 2 can be fixed on the inner side of the outer tube 1. When the inner tube 2 needs to be replaced, the bolts on the connecting flanges 4 of the two air ducts are removed, and the inner tube 2 can be directly pulled out from the outer tube 1, thereby improving the efficiency of disassembly and replacement. The protective plate 3 is set to strengthen the structural strength of the outer tube 1 and improve the protection of the outer tube 1. The corrosion-resistant and high-temperature resistant coating 24 can reduce the erosion of the inner tube 2 by high-temperature flue gas, protect the inner tube 2, and increase the service life of the air duct.

[0027] In a preferred embodiment, Figure 2 and Figure 3 As shown, connecting flanges 4 are provided at both ends of the outer circumference of the outer tube 1 , and an annular pressing plate 5 is fixedly connected to one side of the connecting flange 4 by bolts, and the annular pressing plate 5 is pressed tightly against one end surface of the inner tube 2 close to the fixing ring 21 .

[0028] It should be noted that the outer diameter of the annular pressure plate 5 is the same as the outer diameter of the connecting flange 4 , and the inner diameter of the annular pressure plate 5 is the same as the inner diameter of the inner tube 2 .

[0029] In the above embodiment, when in use, the inner tube 2 can be fixed to the inner side of the outer tube 1 by the provided annular pressure plate 5, so as to prevent the inner tube 2 from slipping out from the inner side of the outer tube 1 during transportation and handling, and when connecting two air ducts, the tightness and firmness of the connection can be improved.

[0030] In a preferred embodiment, Figure 2 and Figure 3 As shown, both side surfaces of the annular pressure plate 5 are connected with sealing gaskets 51, and the sealing gaskets 51 are high temperature resistant sealing gaskets. When connecting two air ducts, the end surfaces of the air ducts can be sealed, thereby improving the sealing performance of the air duct connection.

[0031] In a preferred embodiment, Figure 1-Figure 3 As shown, the protective plate 3 is connected around the outer tube 1, and ribs 31 are evenly connected between the two sides of the protective plate 3 and the outer wall of the outer tube 1, which can increase the firmness of the connection between the protective plate 3 and the outer tube 1, thereby improving the protective effect of the protective plate 3.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fire smoke exhaust duct, characterized in that: The invention comprises an outer tube (1) and an inner tube (2), wherein the inner tube (2) is slidably connected to the inner side of the outer tube (1), a fixing groove (11) is provided on the inner side of one end of the outer tube (1), and positioning blocks (12) are symmetrically provided on the inner wall of the fixing groove (11), a fixing ring (21) is provided on the outer side of one end of the inner tube (2), and the fixing ring (21) is slidably embedded in the fixing groove (11), and positioning grooves (22) are symmetrically provided on the outer circumference of the fixing ring (21), and the fixing ring (21) is symmetrically provided with positioning grooves (22), and the fixing ring (21) is symmetrically provided with positioning grooves (22). The positioning groove (22) is slidably sleeved on the outside of the positioning block (12); the inner side of the other end of the outer tube (1) is fixedly connected to a limiting ring (13); the outer side of the other end of the inner tube (2) is provided with a limiting groove (23); the other end of the outer tube (1) abuts against the inner side of the limiting groove (23) through the limiting ring (13); the outer peripheral surface of the outer tube (1) is fixedly connected to a plurality of protective plates (3); and the protective plates (3) are arranged at equal intervals in the length direction of the outer tube (1).

2. A fire smoke exhaust duct according to claim 1, characterized in that: Both ends of the outer circumference of the outer tube (1) are provided with connecting flanges (4), one side of the connecting flange (4) is fixedly connected to an annular pressing plate (5) by means of bolts, and the annular pressing plate (5) is pressed tightly against an end surface of the inner tube (2) close to the fixing ring (21).

3. A fire smoke exhaust duct according to claim 2, characterized in that: The outer diameter of the annular pressure plate (5) is the same as the outer diameter of the connecting flange (4), and the inner diameter of the annular pressure plate (5) is the same as the inner diameter of the inner tube (2).

4. The fire smoke exhaust duct according to claim 3, characterized in that: Both side surfaces of the annular pressure plate (5) are connected to sealing gaskets (51), and the sealing gaskets (51) are high temperature resistant sealing gaskets.

5. The fire smoke exhaust duct according to claim 1, characterized in that: The protective plate (3) is connected around the outer tube (1), and rib plates (31) are evenly connected between the two sides of the protective plate (3) and the outer wall of the outer tube (1).

6. The fire smoke exhaust duct according to claim 1, characterized in that: The inner wall of the inner tube (2) is evenly coated with a corrosion-resistant and high-temperature-resistant coating (24).

7. The fire smoke exhaust duct according to claim 1, characterized in that: The side surface of the fixing ring (21) is flush with the end surface of the inner tube (2), and the side surface of the limiting ring (13) is flush with the end surface of the outer tube (1).

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