Air leakage prevention pipe

Abstract

The air leakage prevention pipe comprises a ventilation pipe and a sleeve, flanges are arranged at the ends of the ventilation pipe, end face grooves matched with the flanges are formed in the two ends of the sleeve, first sealing gaskets attached to the end faces and the side faces of the flanges are arranged in the end face grooves, and the end face grooves are detachably connected with the flanges. And the whole leakage-proof effect of the air pipe is improved by increasing the sealing contact surface of the sleeve and the ventilation pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, in particular to a leakage-proof air duct. Background Art

[0002] The air duct is an important part of the pipeline system for air transportation. The existing air duct generally has a flange at the end of the stainless steel ventilation pipe, and then the flange is used to connect multiple sections of the ventilation pipe into a unified pipeline for transporting airflow. In order to prevent leakage and loss due to the sealing problem of the ventilation pipe when the airflow is transported in the ventilation pipe, the existing technology generally sets a sealing gasket between the flanges connecting the ventilation pipe, so as to achieve the purpose of improving the sealing effect of the ventilation pipe. However, the existing sealing gasket is generally limited to contact with the end face of the flange, and the contact area is limited, which poses a risk of gas leakage in the pipe. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a leakage-proof air duct.

[0004] The technical solution of the utility model is: a leakage-proof air duct includes a ventilation pipe and a sleeve, the end of the ventilation pipe is provided with a flange, the two ends of the sleeve are provided with end face grooves matching the flange, the end face groove is provided with a first sealing gasket that fits the end face and side face of the flange, and the end face groove and the flange are detachably connected.

[0005] Furthermore, a plurality of symmetrically distributed bolts are provided on the edge of the end surface groove, one end of the bolt passes through the end surface groove and the flange and cooperates with the nut to fix the sleeve and the ventilation pipe in connection.

[0006] Furthermore, a sealing plate is provided on a side of the flange away from the sleeve, the sealing plate is fitted with the flange, and a second sealing gasket is provided on a side of the sealing plate close to the flange.

[0007] Furthermore, the sealing plate includes an upper plate and a lower plate, and steps that cooperate with each other are provided at the connection between the upper plate and the lower plate.

[0008] Furthermore, a protrusion is provided on the flange, and a positioning groove matching the protrusion is provided on the end surface groove.

[0009] Furthermore, a fixing frame is provided at a position of the ventilation pipe close to the end surface groove, convex edges are provided on both sides of the fixing frame, connecting rods are provided on the convex edges, and the ventilation pipe is fixedly connected to the installation point through the connecting rods.

[0010] Furthermore, a plurality of guide grooves are provided on the inner wall of the sleeve along the length direction, and both ends of the guide grooves are connected to the end surface of the sleeve.

[0011] Compared with the prior art, the utility model has the advantages that the detachable connection between the sleeve and the ventilation pipe facilitates the maintenance or replacement of components. The first sealing gasket increases the closed contact surface between the end face groove and the flange, thereby improving the assembly sealing of the sleeve and the ventilation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is an overall schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the ventilation pipe of the utility model;

[0015] Figure 3 It is a cross-sectional schematic diagram of the sleeve of the utility model;

[0016] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0017] Figure 5 This is a schematic diagram of the sealing plate of the utility model;

[0018] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0019] Among them: 1. ventilation pipe; 2. sleeve; 3. sealing plate; 11. flange; 12. fixing frame; 111. protrusion; 121. convex edge; 122. connecting rod; 21. end face groove; 22. first sealing gasket; 23. guide groove; 24. positioning groove; 31. upper plate; 32. lower plate; 33. second sealing gasket; 34. step. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0021] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0022] like Figures 1 to 6As shown, a leak-proof air duct includes a ventilation pipe 1 and a sleeve 2, wherein a flange 11 is provided at the end of the ventilation pipe 1, and end face grooves 21 matching the flange 11 are provided at both ends of the sleeve 2. A plurality of symmetrically distributed bolts are provided on the edge of the end face groove 21, and one end of the bolt passes through the end face groove 21 and the flange 11 and cooperates with a nut to make the sleeve 2 and the ventilation pipe 1 detachably connected. The detachable sleeve 2 is convenient for later inspection of the air tightness of the assembly of components or replacement of components. A first sealing gasket 22 is provided in the end face groove 21, which is in contact with the end face and side face of the flange 11. The first sealing gasket 22 increases the contact sealing area between the end face groove 21 and the flange 11, and improves the assembly air tightness of the sleeve 2 and the ventilation pipe 1.

[0023] The flange 11 is provided with a protrusion 111, and the end face groove 21 is provided with a positioning groove 24 that matches the protrusion 111. The cooperation between the protrusion 111 and the positioning groove 24 allows the sleeve 2 and the ventilation pipe 1 to quickly confirm the axial position, thereby improving the convenience of assembly. A fixing frame 12 is provided near the end face groove 21 of the ventilation pipe 1, and convex edges 121 are provided on both sides of the fixing frame 12. A connecting rod 122 is provided on the convex edge 121, and the ventilation pipe 1 is fixedly connected to the installation point through the connecting rod 122. The vertical and horizontal degrees of freedom of the ventilation pipe 1 are limited by the fixing frame 12, and the fixing frame 12 keeps the air pipe in a stable state, preventing the ventilation pipe 1 from loosening the connection with the sleeve 2 due to shaking, thereby increasing the assembly gap and causing gas leakage. The inner wall of the sleeve 2 is provided with a plurality of guide grooves 23 along the length direction, and the two ends of the guide grooves 23 are connected to the end face of the sleeve 2. The guide groove 23 can guide the airflow to pass through the sleeve 2, and reduce the vibration of the sleeve 2 caused by the airflow passing through the sleeve 2, thereby ensuring the stability of the connection between the sleeve 2 and the ventilation pipe 1.

[0024] A sealing plate 3 is provided on the side of the flange 11 away from the sleeve 2, and the sealing plate 3 is in contact with the flange 11. A second sealing gasket 33 is provided on the side of the sealing plate 3 close to the flange 11. The sealing plate 3 isolates the assembly gap between the first sealing end and the end face groove 21 and the flange 11 from the outside world, further improving the air tightness of the sleeve 2 and the ventilation pipe 1. The sealing plate 3 includes an upper plate 31 and a lower plate 32. The upper plate 31 is sleeved on the upper part of the ventilation pipe 1, and the lower plate is sleeved on the lower part of the ventilation pipe 1, so that it is convenient to assemble the sealing plate 3 to the ventilation pipe 1. A step 34 that cooperates with each other is provided at the connection between the upper plate 31 and the lower plate 32. The cooperation of the step 34 can improve the tightness of the assembly of the upper plate 31 and the lower plate 32, and maintain the stability of the assembly structure of the sealing plate 3 and the ventilation pipe 1.

[0025] The working principle of the specific implementation of the utility model is: the airflow passes through the ventilation pipe 1-sleeve 2-ventilation pipe 1 in sequence. The flange 11 of the ventilation pipe 1 is embedded in the end surface groove 21, and the first sealing gasket 22 arranged in the end surface groove 21 increases the sealing contact area between the sleeve 2 and the ventilation pipe 1, thereby improving the sealing performance of the sleeve 2 and the ventilation pipe 1.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A leak-proof air duct, characterized in that: The invention comprises a ventilation pipe (1) and a sleeve (2), wherein a flange (11) is provided at the end of the ventilation pipe (1), and end face grooves (21) matching the flange (11) are provided at both ends of the sleeve (2), and a first sealing gasket (22) matching the end face and the side face of the flange (11) is provided in the end face groove (21), and the end face groove (21) and the flange (11) are detachably connected.

2. The anti-leakage air duct according to claim 1, characterized in that: The edge of the end surface groove (21) is provided with a plurality of symmetrically distributed bolts, one end of each bolt passes through the end surface groove (21) and the flange (11) and cooperates with a nut to securely connect the sleeve (2) to the ventilation pipe (1).

3. The anti-leakage air duct according to claim 1, characterized in that: A sealing plate (3) is provided on a side of the flange (11) away from the sleeve (2), the sealing plate (3) is in contact with the flange (11), and a second sealing gasket (33) is provided on a side of the sealing plate (3) close to the flange (11).

4. The anti-leakage air duct according to claim 3, characterized in that: The sealing plate (3) comprises an upper plate (31) and a lower plate (32), and a step (34) which cooperates with each other is provided at the connection between the upper plate (31) and the lower plate (32).

5. The anti-leakage air duct according to claim 1, characterized in that: The flange (11) is provided with a protrusion (111), and the end surface groove (21) is provided with a positioning groove (24) matching the protrusion (111).

6. The anti-leakage air duct according to claim 1, characterized in that: The ventilation pipe (1) is provided with a fixing frame (12) at a position close to the end surface groove (21), and convex edges (121) are provided on both sides of the fixing frame (12). Connecting rods (122) are provided on the convex edges (121), and the ventilation pipe (1) is fixedly connected to the installation point via the connecting rods (122).

7. The anti-leakage air duct according to claim 1, characterized in that: The inner wall of the sleeve (2) is provided with a plurality of guide grooves (23) along the length direction, and both ends of the guide grooves (23) are connected to the end surface of the sleeve (2).

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