Smoke vents with improved airtightness

Abstract

This utility model discloses a flue gas outlet with improved airtightness, comprising a tubular flue shell, a limiting and fixing plate, and a baffle. The limiting and fixing plate matches the inner hole of the flue shell and is perpendicular to the length direction of the flue shell. An outer frame is fixed to the inner wall of the flue shell, and a support rod passing through the geometric center is provided inside the outer frame. A shaft is provided on the upper part of the support rod, which is hinged to the baffle. A flanged limiting structure is provided on one side of the support rod, located on the shaft. The hole in the annular area enclosed by the support rod and the outer frame is smaller than the area of ​​the baffle, and the perimeter of the hole has an upwardly extending flanged structure. The upper edge of the flanged structure coincides with the same plane and can form a line seal by tightly fitting with the baffle. The baffle is similar in shape to the hole, and its perimeter extends to cover the flanged structure. This utility model effectively prevents external backflow from entering the gas water heater, protecting the internal components.

Description

Technical Field

[0001] This utility model relates to the field of smoke exhaust equipment manufacturing technology, and in particular to a smoke exhaust outlet with improved air tightness. Background Technology

[0002] The existing structure of the flue gas outlet of a gas water heater is shown in the figure. It consists of a flue shell 1, a limiting and fixing plate 2, a shaft 3, and a baffle 4. The limiting and fixing plate is fixed to the inner wall of the shell by an interference fit; the shaft is fixed to the limiting and fixing plate and is in an eccentric position; the baffle is fixed to the limiting and fixing plate by the shaft. The limiting and fixing plate has a limiting structure, which allows the baffle to rotate and flip only within a fixed angle range.

[0003] The drawback of the existing structure is that, in order to ensure that the baffle can be flipped flexibly, a large gap is left between the baffle, the fixed plate, and the flue housing. This results in poor sealing when the baffle is closed, especially in winter when it is windy. Wind can flow back into the gas water heater through the gap, causing frost damage to the internal components.

[0004] Therefore, how to effectively prevent external backflow from entering the gas water heater and provide good protection for the internal components of the water heater has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a flue with improved air tightness, the purpose of which is to effectively prevent external backflow from entering the gas water heater and to provide good protection for the internal components of the water heater.

[0006] To achieve the above objectives, this utility model discloses a smoke exhaust port with improved airtightness, including a tubular smoke pipe shell;

[0007] The smoke pipe housing is provided with a limiting and fixing plate and a baffle that are hinged together.

[0008] The limiting and fixing plate is a plate-shaped frame structure whose shape matches the inner hole of the flue shell. It is set perpendicular to the length direction of the flue shell, and the outer frame is fixed to the inner wall of the flue shell. A support rod passing through the geometric center is provided inside the outer frame.

[0009] The support rod is provided with a shaft that is hinged to the baffle.

[0010] The support rod has a flange limiting structure on one side of the shaft;

[0011] The holes in the annular area formed by the support rod and the outer frame are smaller than the area of ​​the baffle, and the holes are provided with upwardly extending flange structures around their edges.

[0012] The upper edges of the hole flange structure coincide on the same plane and can be tightly fitted with the baffle to form a line seal;

[0013] The baffle is similar in shape to the hole, and its edges extend to cover the flanged structure of the hole.

[0014] Preferably, the outer frame of the limiting and fixing plate is provided with a flange structure along the inner wall of the flue shell;

[0015] The flange structure has a perforated convex structure at the position corresponding to the shaft, and the shaft is fixed by the two perforated convex structures.

[0016] Preferably, the baffle has a protruding pressing structure corresponding to the inner hole of the hole flange structure, or a recessed pressing structure corresponding to the outer shape of the hole flange structure.

[0017] Preferably, one or more cylindrical flanges are rolled out at the position where the baffle connects with the shaft.

[0018] Preferably, the end of the flue casing is provided with a reinforcing flange.

[0019] The beneficial effects of this utility model are:

[0020] This utility model has a simple and reliable structure and better sealing performance. Tests have verified that it can effectively prevent external backflow from entering the gas water heater and provides excellent protection for the internal components of the water heater.

[0021] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0022] Figure 1 A schematic diagram of the existing technology is shown.

[0023] Figure 2 A schematic diagram of an embodiment of the present invention is shown.

[0024] Figure 3 The diagram shows a structural schematic of a limiting and fixing plate in one embodiment of the present invention.

[0025] Figure 4 The diagram shows a schematic representation of the baffle in one embodiment of the present invention.

[0026] Figure 5 The diagram shows a structural schematic of the smoke pipe shell in one embodiment of the present invention. Detailed Implementation

[0027] Example: Figures 2 to 5 As shown, the exhaust port with improved air tightness includes a tubular exhaust pipe housing 1;

[0028] The smoke pipe housing 1 is provided with a limiting and fixing plate 2 and a baffle 3 that are hinged together;

[0029] The limiting and fixing plate 2 is a plate-shaped frame structure whose shape matches the inner hole of the flue shell 1. It is set perpendicular to the length direction of the flue shell 1. The outer frame is fixed to the inner wall of the flue shell 1. A support rod passing through the geometric center is provided inside the outer frame.

[0030] The support rod is provided with a shaft 4 that is hinged to the baffle 3;

[0031] On the support rod, a flange limiting structure 5 is provided on one side of shaft 4;

[0032] The holes in the annular area formed by the support rod and the outer frame are smaller than the area of ​​the baffle 3, and the holes are provided with upward-extending flange structures 7 around the edges.

[0033] The upper edges of the hole flange structure 7 coincide on the same plane and can form a line seal by tightly fitting with the baffle 3;

[0034] The baffle 3 is similar in shape to the hole, and its edges extend to cover the flange structure 7 of the hole.

[0035] In practical applications, the function of the flange limiting structure 5 is to limit the angle of the baffle 3 to prevent it from flipping too much and being unable to reset.

[0036] The function of the perforated flange structure 7 is to form a line seal with the baffle 3, effectively preventing strong winds from flowing back into the water heater.

[0037] In some embodiments, the outer frame of the limiting and fixing plate 2 is provided with a flange structure along the inner wall of the flue shell 1;

[0038] The flange structure has a perforated convex structure 6 at the position corresponding to the shaft 4, and the shaft 4 is fixed by the two perforated convex structures 6.

[0039] In some embodiments, the baffle 3 has a protruding pressing structure 8 in the inner hole of the corresponding hole flange structure 7, or a recessed pressing structure 8 in the outer shape of the corresponding hole flange structure 7.

[0040] The function of the pressed structure 8 is to provide positioning and fit between the baffle 3 and the hole flange structure 7, and to provide a better sealing effect.

[0041] In some embodiments, one or more cylindrical flanges 9 are rolled out at the position where the baffle 3 meets the shaft 4.

[0042] In practical applications, the cylindrical flange 9 is used to form a hinge connection with the shaft 4.

[0043] In some embodiments, the end of the flue housing 1 is provided with a reinforcing flange 10.

[0044] In practical applications, the presence of the reinforced flange 10 can increase the strength of the flue shell 1 and prevent the sharp edges from cutting the user.

[0045] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A smoke vent having improved air tightness; characterised in that, Includes a tubular flue shell (1); The smoke pipe housing (1) is provided with a limiting fixing plate (2) and a baffle (3) that are hinged together. The limiting fixing plate (2) is a plate-shaped frame structure whose shape matches the inner hole of the flue shell (1). It is set perpendicular to the length direction of the flue shell (1). The outer frame is fixed to the inner wall of the flue shell (1). A support rod passing through the geometric center is provided inside the outer frame. The support rod is provided with a shaft (4) that is hinged to the baffle (3); The support rod is provided with a flange limiting structure (5) on one side of the shaft (4). The hole in the annular area formed by the support rod and the outer frame is smaller than the area of ​​the baffle (3), and the hole is provided with an upwardly extending hole flange structure (7) at the periphery of the hole. The upper edge of the hole flange structure (7) coincides with the same plane and can form a line seal with the baffle (3); The baffle (3) is similar in shape to the hole, and its edges extend to cover the flanged structure (7) of the hole.

2. The smoke exhaust port with improved airtightness according to claim 1, characterized in that, The outer frame of the limiting fixing plate (2) is provided with a flange structure along the inner wall of the smoke pipe shell (1); The flange structure has a perforated convex hull structure (6) at the position corresponding to the shaft (4), and the shaft (4) is fixed by the two perforated convex hull structures (6).

3. The smoke exhaust port with improved airtightness according to claim 1, characterized in that, The baffle (3) has a protruding pressing structure (8) corresponding to the inner hole of the hole flange structure (7), or a recessed pressing structure (8) corresponding to the outer shape of the hole flange structure (7).

4. The smoke exhaust port with improved airtightness according to claim 1, characterized in that, One or more cylindrical flanges (9) are rolled out at the position where the baffle (3) connects with the shaft (4).

5. The smoke exhaust port with improved airtightness according to claim 1, characterized in that, The end of the flue casing (1) is provided with a reinforcing flange (10).

Images