Smoke exhaust pipe connecting assembly

Abstract

The utility model discloses a smoke exhaust pipe connecting assembly which comprises an air outlet cover and a smoke exhaust pipe connected with the air outlet cover, the top of the air outlet cover is in a circular ring shape, an inner ring wall and an outer ring wall which extend upwards are formed on the top of the air outlet cover, and the inner ring wall and the outer ring wall are arranged at intervals from inside to outside. The smoke exhaust pipe connecting assembly further comprises an assembly part for fixing the smoke exhaust pipe on the air outlet cover, the assembly part is a hard part, the inner ring wall, the top of the air outlet cover and the outer ring wall form a containing groove for containing the assembly part, and the assembly part comprises an annular base and an extending part extending upwards on the base. The base is connected with the top of the air outlet cover, the extending part is arranged on the outer side of the inner ring wall, and the smoke exhaust pipe is arranged on the outer side of the extending part in a sleeving mode. Compared with the prior art, the exhaust hood has the advantage that the problem that the fit clearance allowance of the smoke exhaust pipe and the air outlet hood is not enough is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil fume purification device, especially a smoke exhaust pipe connecting assembly. BACKGROUND

[0002] The existing smoke exhaust pipe and the assembly part are connected by soft connection, and the smoke exhaust pipe is usually fixed on the assembly part by aluminum foil tape.

[0003] For example, a kind of range hood air outlet cover is disclosed in Chinese utility model patent with application No.201720598925.X, including cover, connecting ring, valve piece and adapter, adapter includes annular bottom, inner ring wall and outer ring wall, first oil collection passage is formed between inner ring wall and outer ring wall, connecting ring is located above outer ring wall, oil leakage hole is opened on annular bottom, the inner side bottom of adapter and cover form self-outer and inner inclined upwardly inclined oil flow passage, the inner circumference of cover is profiled with annular oil collection groove, annular oil collection groove is located below annular bottom and is communicated with oil leakage hole, and the gap is left between the lower surface of annular bottom and annular oil collection groove, and the lowest point of oil flow passage outlet is higher than the lower surface of annular bottom and lower than its upper surface.

[0004] The existing smoke exhaust pipe and the air outlet cover are connected by soft connection, the air outlet cover is generally made of plastic material, the wall thickness of the air outlet cover is 1mm-2mm, due to the stretch caused by die precision and environmental temperature and the forceful pulling of installation worker when pasting tape, the circular air outlet cover can be deformed, so that the cooperation gap of the air outlet cover and the smoke exhaust pipe is insufficient, which can cause installation difficulty. INVENTION CONTENTS

[0005] The utility model provides a kind of smoke exhaust pipe connecting assembly to solve the insufficient cooperation gap of the smoke exhaust pipe and the air outlet cover for the problems existing in the prior art.

[0006] The technical scheme adopted by the utility model to solve the above technical problems is as follows: a kind of smoke exhaust pipe connecting assembly, including air outlet cover and the smoke exhaust pipe connected with air outlet cover, the top of the air outlet cover is annular, the top of the air outlet cover forms the inner ring wall and outer ring wall extending upwards, the inner ring wall and outer ring wall are spaced apart from inside to outside, characterized in that: the smoke exhaust pipe connecting assembly further includes assembly part for fixing smoke exhaust pipe on air outlet cover, the assembly part is hard component, the inner ring wall, the top of air outlet cover and outer ring wall constitute accommodating groove for accommodating assembly part, the assembly part includes annular base and the extension part extending upwards on base, the base is connected with the top of air outlet cover, the extension part is arranged on the outer side of inner ring wall, and the smoke exhaust pipe is sleeved on the outer side of extension part.

[0007] By embedding rigid fittings in the receiving groove, with the extension of the fittings positioned between the inner ring wall of the exhaust pipe and the air hood, the problem of insufficient clearance between the exhaust pipe and the air hood is solved. The rigid components prevent dimensional deformation at the assembly position, thus achieving the purpose of easily fitting the exhaust pipe.

[0008] In order to secure the exhaust pipe, the fitting also includes an abutment portion that can press the exhaust pipe against the extension portion, the abutment portion being disposed on the base.

[0009] In order to secure the exhaust pipe, the abutment portion is formed by bending upward from the edge of the base. The abutment portion can be in a first state of longitudinal extension and a second state of deformation and bending to abut against the exhaust pipe after an external force is applied.

[0010] To facilitate the bending of the abutment part by the tool, the air vent is provided with a tool groove that allows the tool to be inserted to apply external force to the abutment part.

[0011] To facilitate the bending of the tool's contact part, the tool groove is formed by the inner surface of the outer ring wall being recessed towards the outside, and the top of the tool groove is open.

[0012] To facilitate bending of the abutment portion, the first state of the abutment portion is that it extends longitudinally inward at an inward angle.

[0013] To fill the gap between the exhaust pipe and the hood, glue can be filled into the receiving groove.

[0014] Compared with existing technologies, the advantages of this utility model are as follows: By embedding a rigid fitting into the receiving groove, with the extension of the fitting positioned between the inner ring wall of the exhaust pipe and the air outlet hood, the problem of insufficient clearance between the exhaust pipe and the air outlet hood is solved. The rigid component prevents dimensional deformation at the assembly position, achieving easy assembly of the exhaust pipe. Physical compression is used to press the abutment part tightly against the exhaust pipe, achieving a secure fixation. Glue is filled into the receiving groove to ensure a seal between the exhaust pipe and the air outlet hood. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the abutting portion of the exhaust pipe connecting assembly in the first state according to an embodiment of the present utility model.

[0016] Figure 2 This is a cross-sectional view of the abutment portion of the exhaust pipe connecting assembly in the first state according to an embodiment of the present utility model.

[0017] Figure 3 for Figure 2 A magnified view of section I;

[0018] Figure 4This is an exploded view of the exhaust pipe connecting assembly in the first state according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the abutment portion of the exhaust pipe connection assembly in the second state according to an embodiment of the present invention. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0022] See Figures 1-5 A smoke exhaust pipe connection assembly includes an exhaust hood 1 and an exhaust pipe 2 connected to the exhaust hood 1. The top of the exhaust hood 1 is annular, and the top of the exhaust hood 1 has an inner ring wall 11 and an outer ring wall 12 that both extend upward, and the inner ring wall 11 and the outer ring wall 12 are spaced apart from the inside to the outside.

[0023] The exhaust pipe connection assembly also includes a fitting 3 for fixing the exhaust pipe 2 to the exhaust hood 1. The fitting 3 is a rigid component, such as a metal part, preferably made of steel. The inner ring wall 11, the top of the exhaust hood 1, and the outer ring wall 12 form a receiving groove 13 for accommodating the fitting 3. The fitting 3 includes an annular base 31 and an extension 32 extending upward on the base 31, both of which may have an L-shaped longitudinal section. Preferably, the fitting 3 is made of metal, and the extension 32 is formed by flanging the inner edge of the base 31 upward, which can also increase the deformation strength. The base 31 has a screw hole 311, which is used to connect to the top of the exhaust hood 1 with a screw. The extension 32 is sleeved on the outside of the inner ring wall 11, and the exhaust pipe 2 is sleeved on the outside of the extension 32. The fitting 3 also includes an abutment 33 that can press the exhaust pipe 2 against the extension 32, and the abutment 33 is provided on the base 31. By embedding the fitting 3 and fitting the extension of the fitting 3 onto the inner ring wall 11, the metal strength is used to limit the dimensional deformation of the assembly position, thereby achieving the purpose of easily fitting the exhaust pipe 2.

[0024] See Figures 3-5 The abutment portions 33 are evenly distributed on the base 31, and the abutment portions 33 are formed by bending upward from the edge of the base 31. The abutment portions 33 can be in a first state of longitudinal extension and a second state of deformation and bending to abut against the exhaust pipe 2 after an external force is applied.

[0025] The exhaust hood 1 is provided with a tool slot 14 for easy insertion of tools to apply external force to the abutment part 33. The tool slot 14 is formed by a recess on the inner surface of the outer ring wall 12 facing outward, and the top of the tool slot 14 is open. The tool slot 14 is used to facilitate the insertion of tools such as screwdrivers by the installer. The outward expansion structure of the tool slot 14 increases the operating space for the installer, making it convenient to press the abutment part 33 with a screwdriver. After the abutment part 33 is pressed firmly, it can firmly hold the exhaust pipe 2, achieving the purpose of fastening. The operation is simple, convenient and efficient.

[0026] See Figure 3 The first state of the contact part 33 is that it extends longitudinally inward at an angle, and the specific angle value can be determined according to the convenience of the installer.

[0027] The assembly gap between the exhaust pipe 2 and the air outlet hood 1 can be filled with glue in the receiving groove 13 to achieve a sealing effect.

[0028] 1. Use liquid adhesive with good fluidity and short curing time (within 20 minutes). The adhesive cures quickly and requires less glue. For newly installed range hoods that will not be used in the near future, the curing time (within 20 minutes) is not a problem. For users replacing their range hoods, the range hoods must be allowed to cure (after 20 minutes) before they can be turned on. Otherwise, the pressure inside the flue will blow the uncured adhesive out of the receiving groove 13, resulting in smoke and oil leakage.

[0029] 2. Use liquid adhesive with good fluidity and a normal curing time (generally 24 hours). This adhesive cures slowly and requires a large amount, but is not required for new installations or replacements. Utilizing Pascal's principle for communicating vessels, under atmospheric pressure, the pressure at the bottom of communicating vessels is equal. If pressure is applied to one side of the vessel, the pressure will be transmitted and raise the liquid level on the other side.

[0030] After filling the receiving tank 13 with liquid glue, the exhaust pipe 2 actually divides the receiving tank 13 into two communicating vessels, inner and outer. See [reference needed]. Figure 5 When the range hood is turned on, pressure F appears in the exhaust pipe 2, which will press down the adhesive between the inner side of the exhaust pipe 2 and the inner ring wall 11 of the receiving tank 13. The descending adhesive is transferred through the bottom connection to the channel between the exhaust pipe 2 and the outer ring wall 12, thereby causing the position of the adhesive on the outside (left side in the figure) to rise. That is, the pressure energy is converted into the gravitational potential energy of the adhesive. As long as the height of the tank wall of the receiving tank 13 and the adhesive beam are appropriate, the sealing will be reliable and there will be no air or smoke leakage.

Claims

1. A smoke exhaust duct connecting assembly, comprising an air outlet cover (1) and a smoke exhaust duct (2) connected with the air outlet cover (1), the top of the air outlet cover (1) is in the shape of a ring, the top of the air outlet cover (1) is formed with an inner ring wall (11) and an outer ring wall (12) extending upwards, the inner ring wall (11) and the outer ring wall (12) are spaced apart from inside to outside, characterized in that: The smoke exhaust pipe connecting assembly further comprises a fitting part (3) for fixing the smoke exhaust pipe (2) to the air outlet cover (1), the fitting part (3) is a hard component, the inner ring wall (11), the top of the air outlet cover (1) and the outer ring wall (12) form a containing groove (13) for containing the fitting part (3), the fitting part (3) comprises an annular base (31) and an extension part (32) extending upwards from the base (31), the base (31) is connected to the top of the air outlet cover (1), the extension part (32) is arranged outside the inner ring wall (11), and the smoke exhaust pipe (2) is sleeved outside the extension part (32).

2. A flue connection assembly according to claim 1, characterised in that: The fitting part (3) further comprises an abutting part (33) capable of abutting the smoke exhaust pipe (2) against the extension part (32), and the abutting part (33) is arranged on the base (31).

3. A flue gas conduit connection assembly according to claim 2, characterised in that: The abutting part (33) is bent upwards at the edge of the base (31), and the abutting part (33) can be in a first state of longitudinal extension and a second state of deformation and bending to abut against the smoke exhaust pipe (2) after an external force is applied.

4. A flue gas conduit connection assembly according to claim 3, characterised in that: The air outlet cover (1) is provided with a tool groove (14) for facilitating the insertion of a tool to apply an external force to the abutting part (33).

5. A flue gas conduit connection assembly according to claim 4, characterised in that: The tool groove (14) is recessed from the inner side surface of the outer ring wall (12) towards the outer side direction, and the top of the tool groove (14) is open.

6. A flue gas conduit connection assembly according to claim 3, characterised in that: The first state of the abutting part (33) is to extend longitudinally and inwardly.

7. A flue connection assembly according to any one of claims 1 to 6, wherein: The containing groove (13) is filled with glue.

Images