Leak-proof duct flange connection sealing structure

Abstract

This utility model relates to the field of duct flange technology, and in particular to a leak-proof duct flange connection sealing structure, including a connecting flange, hexagonal bolts, and sealing strips. In use, the duct flange connection sealing structure, composed of the connecting flange, hexagonal bolts, and sealing strips, allows the duct end to be inserted into the sealing groove on the connecting flange. Insertion causes the first rectangular sealing ring to deform, maintaining a seal between the first rectangular sealing ring and the inside of the duct. The outer and inner sealing edges are welded to the duct, further ensuring a tight seal. The second rectangular sealing rings of the two connecting flanges at the connection point press against each other, achieving a seal at the connection point. This results in a good sealing effect at the duct connection, reducing air leakage. The sealing strip wrapped around the outside of the duct flange connection further ensures the airtightness of the connection and also makes the duct more aesthetically pleasing.

Description

Technical Field

[0001] This utility model relates to the field of duct flange technology, specifically to a leak-proof duct flange connection sealing structure. Background Technology

[0002] Duct flanges are flat, flange-shaped plate components used to connect ducts. They are mainly used in building engineering to connect the pipe ends of ducts and ensure the airtight operation of the pipeline system through sealing.

[0003] Currently, most existing duct flanges connect pipes using bolts or special clamps. After connecting pipes, duct flanges cannot achieve a good sealing effect in high-pressure ventilation or smoke control systems, resulting in air leakage and failing to meet the requirements of clean air conditioning systems such as cleanrooms.

[0004] Based on this, the present invention designs a leak-proof duct flange connection sealing structure to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a leak-proof duct flange connection sealing structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof duct flange connection sealing structure, including a connecting flange, hexagonal bolts and sealing strips. The connecting flange is welded and fixed to the end of the duct. The connecting flanges at the duct end connection are fixedly connected by multiple sets of hexagonal bolts. The four sides of the two connecting flanges at the duct end connection are all wrapped with sealing strips.

[0007] The connecting flange includes a flange body, a retaining strip, bolt holes, an outer sealing edge, an inner sealing edge, a sealing groove, a first rectangular sealing ring, a groove, and a second rectangular sealing ring. A retaining strip is circumferentially arranged on one side of the outer edge of the flange body. Multiple bolt holes are circumferentially opened on the flange body. An outer sealing edge is provided on one side of the flange body. An inner sealing edge is provided below the outer sealing edge. A sealing groove is opened in the inner sealing edge, and a first rectangular sealing ring is embedded in the sealing groove.

[0008] As a preferred embodiment of this utility model, a groove is provided on the side of the flange plate opposite to the outer sealing edge, and a second rectangular sealing ring is embedded in the groove.

[0009] As a preferred embodiment of this utility model, the pipe end of the duct is set in the sealing groove, the outer sealing edge is fixedly connected to the outer side wall of the duct end by welding, and the inner sealing edge is fixedly connected to the inner side wall of the duct end by welding.

[0010] As a preferred technical solution of this utility model, the sealing strip has a sealing groove inside, and the two ends of the sealing groove are wedge-shaped surfaces.

[0011] As a preferred technical solution of this utility model, the shape formed by the outer retaining strips after the two connecting flanges are connected is interference-fitted with the sealing groove opened inside the sealing strip.

[0012] As a preferred technical solution of this utility model, the wedge-shaped end faces of the two adjacent sealing strips are bonded together to form a smooth transition, and the four sealing strips form a rectangular sealing structure on the outside of the connecting flange at the connection of the two air ducts.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In use, this utility model utilizes a duct flange connection sealing structure composed of a connecting flange, hexagonal bolts, and sealing strips. By inserting the end of the duct into the sealing groove on the connecting flange, the first rectangular sealing ring is compressed and deformed after insertion, maintaining a seal between the first rectangular sealing ring and the inside of the duct. The outer and inner sealing edges are welded to the duct, further ensuring the seal. The second rectangular sealing rings of the two connecting flanges at the connection point press against each other, achieving a seal at the connection between the two connecting flanges. This results in a good sealing effect at the duct connection, reducing air leakage. The sealing strip wrapped around the outside of the duct flange connection further ensures the airtightness of the duct flange connection, while also making the duct more aesthetically pleasing. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall left-side structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall right-side structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall unfolded structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the overall orthographic structure of this utility model;

[0020] Figure 5 This is a partial enlarged cross-sectional view of the present invention.

[0021] Figure 6This is a partial cross-sectional view of the connecting flange of this utility model;

[0022] Figure 7 This is a schematic diagram of the overall structure of the sealing strip of this utility model.

[0023] In the diagram: 1. Connecting flange; 101. Flange body; 102. Clip; 103. Bolt hole; 104. Outer sealing edge; 105. Inner sealing edge; 106. Sealing groove; 107. First rectangular sealing ring; 108. Groove; 109. Second rectangular sealing ring; 2. Hex bolt; 3. Sealing strip; 301. Sealing groove; 4. Air duct. Detailed Implementation

[0024] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Example

[0026] Please see Figure 1-6 The present invention provides the following technical solution: a leak-proof duct flange connection sealing structure, including a connecting flange 1, hexagonal bolts 2 and sealing strips 3. The connecting flange 1 is welded and fixed to the pipe end of the duct 4. The connecting flanges 1 at the pipe end connection of the duct 4 are fixedly connected by multiple sets of hexagonal bolts 2. The four sides of the two connecting flanges 1 at the pipe end connection of the duct 4 are all wrapped with sealing strips 3.

[0027] The connecting flange 1 includes a flange plate 101, a retaining strip 102, bolt holes 103, an outer sealing edge 104, an inner sealing edge 105, a sealing groove 106, a first rectangular sealing ring 107, a groove 108, and a second rectangular sealing ring 109. A retaining strip 102 is arranged in a ring on one side of the outer edge of the flange plate 101. Multiple bolt holes 103 are arranged in a ring on the flange plate 101. An outer sealing edge 104 is arranged on one side of the flange plate 101. An inner sealing edge 105 is arranged below the outer sealing edge 104. A sealing groove 106 is opened in the inner sealing edge 105. The first rectangular sealing ring 107 is embedded in the sealing groove 106.

[0028] A groove 108 is provided on the side of the flange plate 101 opposite to the outer sealing edge 104, and a second rectangular sealing ring 109 is embedded in the groove 108.

[0029] The pipe end of the air duct 4 is set in the sealing groove 106. The outer sealing edge 104 is fixedly connected to the outer side wall of the pipe end of the air duct 4 by welding, and the inner sealing edge 105 is fixedly connected to the inner side wall of the pipe end of the air duct 4 by welding.

[0030] Through the design of the connection structure between the connecting flange 1 and the duct 4, while adopting a welded connection, a first rectangular sealing ring 107 is provided at the connection between the duct 4 and the inner sealing edge 105. Under the deformation of the first rectangular sealing ring 107, the connection between the connecting flange 1 and the duct 4 maintains a high degree of sealing. The connection between the connecting flanges 1 is sealed by the extrusion deformation between the second rectangular sealing ring 109, thereby giving the duct flange connection a good anti-leakage effect.

[0031] The sealing strip 3 has a sealing groove 301 inside, and the two ends of the sealing groove 301 are wedge-shaped surfaces.

[0032] After the two connecting flanges 1 are connected, the shape formed by the outer retaining strips 102 is interference-fitted with the sealing groove 301 opened inside the sealing strip 3.

[0033] The wedge-shaped end faces at the connection of two adjacent sealing strips 3 are bonded together to form a smooth transition, and the four sealing strips 3 form a rectangular sealing structure on the outside of the connecting flange 1 at the connection of the two air ducts 4.

[0034] The four sealing strips 3 mentioned above are used to wrap the outer ends of the connection between the connecting flanges 1, which further seals the connection under the interference fit, and at the same time covers the connection gap, resulting in better aesthetics.

[0035] The working principle and usage process of this utility model are as follows: In specific use, when connecting the connecting flange 1 and the air duct 4, the pipe end of the air duct 4 is inserted into the sealing groove 106 on the connecting flange 1 until it can no longer be inserted. At this time, the pipe end will cause the first rectangular sealing ring 107 in the sealing groove 106 to undergo compression deformation, and the air duct 4 is sealed and connected through the first rectangular sealing ring 107. Then, the outer sealing edge 104 and the inner sealing edge 105 are welded and fixed to the air duct 4, thus completing the connection between the connecting flange 1 and the air duct. Similarly, the pipe end of another air duct is also connected to the connecting flange 1. Multiple hexagonal bolts 2 are used to fix the connecting flanges 1 at the ends of the two air ducts, so that the second rectangular sealing rings 109 of the two connecting flanges 1 abut and squeeze each other. The compression deformation of the two second rectangular sealing rings 109 seals the connection between the two connecting flanges 1. Sealing strips 3 are installed on the four sides of the connection at the outer ends of the two connecting flanges 1. The sealing strips 3 are fixed to each other by adhesive bonding, thereby completing the connection between the air duct flanges, giving the air duct connection a good seal, reducing air leakage at the connection, and ensuring the airtightness of the air duct flange connection.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A leak-proof duct flange connection sealing structure, comprising a connecting flange (1), hexagonal bolts (2), and sealing strips (3), characterized in that: The connecting flange (1) is welded and fixed to the end of the air duct (4). The connecting flanges (1) at the end of the air duct (4) are fixedly connected by multiple sets of hexagonal bolts (2). The four sides of the two connecting flanges (1) at the end of the air duct (4) are all wrapped with sealing strips (3). The connecting flange (1) includes a flange plate (101), a retaining strip (102), bolt holes (103), an outer sealing edge (104), an inner sealing edge (105), a sealing groove (106), a first rectangular sealing ring (107), a groove (108), and a second rectangular sealing ring (109). A retaining strip (102) is provided on one side of the outer edge of the flange plate (101). Multiple bolt holes (103) are provided on the flange plate (101) in a ring. An outer sealing edge (104) is provided on one side of the flange plate (101). An inner sealing edge (105) is provided below the outer sealing edge (104). A sealing groove (106) is provided in the inner sealing edge (105). A first rectangular sealing ring (107) is embedded in the sealing groove (106).

2. The leak-proof duct flange connection sealing structure according to claim 1, characterized in that: A groove (108) is provided on the side opposite to the outer sealing edge (104) of the flange plate (101), and a second rectangular sealing ring (109) is embedded in the groove (108).

3. The leak-proof duct flange connection sealing structure according to claim 1, characterized in that: The pipe end of the air duct (4) is set in the sealing groove (106), the outer sealing edge (104) is fixedly connected to the outer side wall of the pipe end of the air duct (4) by welding, and the inner sealing edge (105) is fixedly connected to the inner side wall of the pipe end of the air duct (4) by welding.

4. The leak-proof duct flange connection sealing structure according to claim 1, characterized in that: The sealing strip (3) has a sealing groove (301) inside, and the two ends of the sealing groove (301) are wedge-shaped surfaces.

5. The leak-proof duct flange connection sealing structure according to claim 1, characterized in that: The shape formed by the outer retaining strip (102) after the two connecting flanges (1) are connected is interference-fitted with the sealing groove (301) opened inside the sealing strip (3).

6. The leak-proof duct flange connection sealing structure according to claim 1, characterized in that: The wedge-shaped end faces of the two adjacent sealing strips (3) are bonded together to form a smooth transition, and the four sealing strips (3) form a rectangular sealing structure on the outside of the flange (1) at the connection of the two air ducts (4).

Images