A well-sealed spiral duct

Abstract

This utility model discloses a well-sealed spiral duct, belonging to the technical field of spiral ducts. It includes two spiral tubes, each with a gasket fixedly installed on one side of the tubes closest to each other, and a flange gasket placed between the two gaskets. A fixing mechanism includes a positioning ring located between the two spiral tubes, which engages with the two gaskets. A sealing mechanism includes a wedge-shaped top ring and a wedge-shaped retaining ring, with the wedge-shaped retaining ring fixedly installed on the inner wall of the lower spiral tube and the wedge-shaped top ring fixedly installed on the inner wall of the upper spiral tube. The flange gasket employs an arc-shaped hole annular array structure to form a double-layer sealing layer, enhancing sealing performance through air barrier effect. Compared to traditional single-layer gaskets, this significantly improves airtightness. The wedge-shaped fit structure of the top and retaining rings, combined with the elastic deformation of the annular rubber gasket, achieves axial compression sealing, forming a dual guarantee of mechanical and soft sealing.

Description

Technical Field

[0001] This utility model belongs to the field of spiral duct technology, specifically, it relates to a well-sealed spiral duct. Background Technology

[0002] Spiral ducts, widely used in ventilation, air conditioning, and smoke extraction systems, are prevalent in the construction and industrial sectors due to their high structural strength, low airflow resistance, and ease of installation. However, the sealing at joints and installation efficiency remain technical challenges for spiral ducts.

[0003] Traditional spiral duct connections primarily use flange connections, where flanges on two sections of duct are bolted together and a gasket is installed between the flanges. While this method is simple in structure, it has the following problems:

[0004] Existing conventional flange connections rely on bolt tightening force. After long-term use, the bolts are prone to loosening due to vibration or thermal expansion and contraction, causing the gaskets to fail and resulting in air or gas leakage. Bolt tightening requires manual tightening one by one, which is cumbersome. Especially in narrow spaces or when working at heights, the installation is difficult and time-consuming.

[0005] To address the aforementioned problems, this application proposes a well-sealed spiral duct. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a well-sealed spiral duct to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A sealed spiral duct includes two spiral tubes, each of which has a gasket fixedly installed on one side of the two spiral tubes that are close to each other, and a flange gasket is placed between the two gaskets.

[0009] The fixing mechanism includes a positioning ring located between two spiral tubes, and the positioning ring cooperates with two pads.

[0010] The sealing mechanism includes a wedge-shaped top ring and a wedge-shaped retaining ring. The wedge-shaped retaining ring is fixedly installed on the inner wall of the lower spiral tube, and the wedge-shaped top ring is fixedly installed on the inner wall of the upper spiral tube. The wedge-shaped top ring and the wedge-shaped retaining ring cooperate with each other.

[0011] Preferably, the fixing mechanism further includes multiple sets of wedge-shaped clamping plates, all of which are fixedly installed on the inner side of the positioning ring. Each set of wedge-shaped clamping plates consists of two plates, which are symmetrically arranged and cooperate with the two pads.

[0012] The wedge-shaped clamping plate inside the positioning ring can press the two pads together, thereby fixing the pads in a vertical position.

[0013] Preferably, the pad has multiple notches, and the wedge-shaped plate cooperates with the corresponding notches.

[0014] The wedge-shaped plate and the notch work together to press the wedge-shaped surface of the plate against the side of the notch, thereby fixing the vertical and horizontal position of the pad and securing the two spiral tubes.

[0015] Preferably, the flange gasket has multiple arc-shaped holes, which are evenly distributed in a ring on the flange gasket.

[0016] By using multiple arc-shaped holes, the flange gasket forms a double-layer structure, resulting in a better sealing effect.

[0017] Preferably, the sealing mechanism further includes an annular rubber pad, which is fixedly installed on the outside of the wedge-shaped top ring and cooperates with the wedge-shaped retaining ring.

[0018] The annular rubber gasket facilitates the formation of a soft seal between the wedge-shaped top ring and the wedge-shaped retaining ring. The wedge shape of the top ring and the retaining ring also enables a push-seal effect at the top opening.

[0019] In summary, the technical effects and advantages of this utility model are as follows:

[0020] Double sealing design

[0021] The flange gasket adopts an arc-shaped hole annular array structure to form an inner and outer double sealing layer. The sealing performance is enhanced by the air barrier effect, which significantly improves the air tightness compared with the traditional single-layer gasket. The addition of a wedge-shaped top ring and a wedge-shaped retaining ring wedge-shaped fit structure, combined with the elastic deformation of the annular rubber gasket, achieves axial compression sealing, forming a dual guarantee of mechanical + soft sealing.

[0022] Self-locking fixing mechanism

[0023] The innovative design uses a rotating wedge-shaped clamping plate that engages with the beveled surface of the recess. The rotating positioning ring drives the wedge-shaped clamping plate to press against the side of the recess, simultaneously achieving bidirectional fixation in both the horizontal (anti-loosening) and vertical (pressing) directions. No additional bolts are required for fastening. The symmetrically arranged wedge-shaped clamping plates form a reverse pressure when rotated to the far end of the pad, using the mechanical self-locking principle to prevent loosening and simplify the installation process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2This is a schematic diagram of the internal structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the fixing mechanism of this utility model;

[0027] Figure 4 This is a schematic diagram of the sealing mechanism of this utility model.

[0028] In the picture:

[0029] 1. Spiral pipe; 2. Gasket; 3. Flange gasket; 4. Arc-shaped hole; 5. Fixing mechanism; 51. Positioning ring; 52. Wedge-shaped retaining plate; 53. Notch; 6. Sealing mechanism; 61. Wedge-shaped top ring; 62. Wedge-shaped retaining ring; 63. Annular rubber gasket. Detailed Implementation

[0030] 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.

[0031] Reference Figure 1-4 A sealed spiral duct includes two spiral pipes 1, with a pad 2 fixedly installed on one side of each spiral pipe 1 that is close to each other, and a flange gasket 3 placed between the two pads 2.

[0032] The fixing mechanism 5 includes a positioning ring 51, which is located between two spiral tubes 1 and cooperates with two pads 2.

[0033] The sealing mechanism 6 includes a wedge-shaped top ring 61 and a wedge-shaped retaining ring 62. The wedge-shaped retaining ring 62 is fixedly installed on the inner wall of the lower spiral tube 1, and the wedge-shaped top ring 61 is fixedly installed on the inner wall of the upper spiral tube 1. The wedge-shaped top ring 61 and the wedge-shaped retaining ring 62 cooperate with each other.

[0034] Reference Figure 1 and Figure 4The fixing mechanism 5 also includes multiple sets of wedge-shaped clamping plates 52. Each set of wedge-shaped clamping plates 52 is fixedly installed inside the positioning ring 51. Each set of wedge-shaped clamping plates 52 consists of two plates, arranged symmetrically. The two wedge-shaped clamping plates 52 cooperate with the two pads 2. The pads 2 have multiple recesses 53. The wedge-shaped clamping plates 52 cooperate with the corresponding recesses 53. Through this cooperation, the wedge-shaped surface of the wedge-shaped clamping plate 52 can press against the side of the recess 53, thereby fixing the vertical and horizontal position of the pads 2 and thus securing the two spiral tubes 1.

[0035] Reference Figure 4 The flange gasket 3 has multiple arc-shaped holes 4, which are evenly distributed in a ring on the flange gasket 3. The arrangement of multiple arc-shaped holes 4 makes the flange gasket 3 form an inner and outer double layer, thereby improving the sealing effect.

[0036] Reference Figure 2 The sealing mechanism 6 also includes an annular rubber pad 63, which is fixedly installed on the outside of the wedge-shaped top ring 61 and cooperates with the wedge-shaped retaining ring 62. The annular rubber pad 63 facilitates the formation of a soft seal between the wedge-shaped top ring 61 and the wedge-shaped retaining ring 62. The wedge-shaped arrangement of the wedge-shaped top ring 61 and the wedge-shaped retaining ring 62 enables the top opening to form a push-seal effect.

[0037] Working principle: When installing two spiral pipes 1, align the two spiral pipes 1 and place them with the two pads 2 overlapping each other. Place the flange gasket 3 between the two pads 2, and place the positioning ring 51 on the outside of the two pads 2. The wedge-shaped clamping plate 52 is located in the recess 53. Rotate the positioning ring 51, which drives multiple sets of wedge-shaped clamping plates 52 to move within the recess 53. The wedge-shaped clamping plates 52 press against the side of the recess 53 through their wedge-shaped surfaces and vertically press and fix the two pads 2. When the two wedge-shaped clamping plates 52 rotate to the side where the two pads 2 are far apart, they press and fix the pads 2. The setting of the annular rubber gasket 63 facilitates the formation of a soft seal between the wedge-shaped top ring 61 and the wedge-shaped retaining ring 62. The wedge-shaped setting of the wedge-shaped top ring 61 and the wedge-shaped retaining ring 62 enables the top opening to form a push-seal effect.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealed spiral duct comprising two spiral ducts (1), characterized in that, A gasket (2) is fixedly installed on one side of each of the two spiral tubes (1) that are close to each other, and a flange gasket (3) is placed between the two gaskets (2); The fixing mechanism (5) includes a positioning ring (51), which is located between two spiral tubes (1) and cooperates with two pads (2); The sealing mechanism (6) includes a wedge-shaped top ring (61) and a wedge-shaped retaining ring (62). The wedge-shaped retaining ring (62) is fixedly installed on the inner wall of the lower spiral tube (1), and the wedge-shaped top ring (61) is fixedly installed on the inner wall of the upper spiral tube (1). The wedge-shaped top ring (61) and the wedge-shaped retaining ring (62) cooperate with each other.

2. A sealed spiral duct according to claim 1, wherein The fixing mechanism (5) also includes multiple sets of wedge-shaped plates (52), which are all fixedly installed on the inner side of the positioning ring (51). Each set of wedge-shaped plates (52) consists of two plates, which are symmetrically arranged and cooperate with the two pads (2).

3. A sealed spiral duct according to claim 2, wherein, The pad (2) has multiple notches (53), and the wedge-shaped plate (52) cooperates with the corresponding notches (53).

4. A sealed spiral duct according to claim 1, wherein The flange gasket (3) has multiple arc-shaped holes (4), which are evenly distributed in a ring on the flange gasket (3).

5. A sealed spiral duct according to claim 1, wherein The sealing mechanism (6) also includes an annular rubber pad (63), which is fixedly installed on the outside of the wedge-shaped top ring (61) and cooperates with the wedge-shaped retaining ring (62).

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