Ventilation pipeline easy to assemble

Abstract

The utility model relates to an easy-to-assemble ventilating duct which is characterized by comprising a first main through pipe and a second main through pipe, first sealing rings are arranged on two sides in the first main through pipe, at least one pair of driving arms are arranged on the periphery of the first main through pipe, slidable auxiliary through pipes are arranged on two sides in the second main through pipe, and the driving arms rotate to drive the auxiliary through pipes to rotate. The auxiliary through pipe is pushed to slide towards the first sealing ring and abut against the first sealing ring. The utility model has the following advantages and effects: tools are not needed during assembly, so that the convenience of overall assembly is improved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, specifically to an easy-to-assemble ventilation duct. Background Technology

[0002] Ventilation ducts are pipes used for air circulation, typically made of galvanized or stainless steel sheets. They are mainly used for ventilation in industrial and civil buildings, or for transporting air in air conditioning systems.

[0003] For example, the announcement number CN218152875U describes a ventilation duct that is easy to install, which includes a ventilation duct 1 and a ventilation duct 2, and also includes a fixing ring 1 and a fixing ring 2 divided into two parts. One end of the ventilation duct 1 has an annular groove, and the ventilation duct 2 is fixedly connected to a convex ring at the same horizontal position as the annular groove. The convex ring is rotatably disposed in the annular groove. Grooves are formed on both sides of the convex ring, and a spring fixed to the bottom is disposed in the groove. A spring block is fixedly connected to the other end of the spring. Sliding grooves are formed on both sides of the annular groove, and a slider that moves up and down is slidably disposed in the sliding groove. A through hole is formed on the end face of the slider.

[0004] In the above technical solution, adjacent pipes are connected by bolts and nuts to replace the traditional welding connection method, which facilitates the overall installation of the ventilation duct. However, in the actual installation process, it was found that in order to ensure the stability of the connection between adjacent pipes, multiple connection holes need to be opened, which requires turning multiple bolts and nuts and using corresponding tools, such as wrenches. Therefore, the installation is not convenient or quick. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an easy-to-assemble ventilation duct that can be assembled without the aid of tools, thereby improving the convenience of overall assembly.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an easily assembled ventilation duct, comprising a first main pipe and a second main pipe, wherein a first sealing ring is provided on both sides inside the first main pipe, and at least a pair of driving arms are provided on the outer periphery of the first main pipe, and slidable auxiliary pipes are provided on both sides inside the second main pipe, wherein the driving arms, by rotating, push the auxiliary pipes to slide toward the first sealing ring and press against the first sealing ring.

[0007] The present invention is further configured such that: a connection port communicating with the inner wall of the first main pipe is provided on the outer periphery of the first main pipe, and symmetrical protruding connection protrusions are provided above the connection port; one end of the driving arm is rotatably connected to the connection protrusion, and the other end extends outward as a driving end; a cam is provided at the end of the driving arm away from the driving end; the cam is eccentrically connected to the connection protrusion; the cam is rotated by the driving arm to move closer to or away from the center of the first main pipe.

[0008] The present invention is further configured such that: the first main pipe has an inwardly offset supporting step inside, the supporting step is used to support the first sealing ring, the first main pipe has an inwardly offset retaining tooth inside, the retaining tooth and the supporting step are spaced apart from each other along the axial direction, and the retaining tooth abuts against the surface of the first sealing ring to limit the position of the first sealing ring.

[0009] The present invention is further configured such that: an annular groove is provided on the outer periphery of the secondary pipe, and a second sealing ring is embedded in the annular groove.

[0010] The present invention is further configured such that: the driving end is provided with an outwardly facing mounting groove, and the mounting groove is provided with an extension rod adapted to the mounting groove, the extension rod being slidable along the extension direction of the mounting groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] During assembly, the auxiliary pipe is subjected to axial thrust by rotating the drive arm, which allows the auxiliary pipe to slide outward relative to the second main pipe, thereby compressing the first sealing ring to form a sealing fit between them. This enables a quick connection between the first and second main pipes without the need for any tools. Therefore, it effectively solves the technical problem of the bolt and nut connection method in the prior art, which requires multiple rotations of the bolt and nut with corresponding tools, thus improving the convenience of overall assembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the first main pipe in this utility model;

[0015] Figure 3 This is a partial internal structure diagram of the first main pipe and the second main pipe during assembly in this utility model. Detailed Implementation

[0016] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] like Figures 1 to 3 As shown, this utility model discloses an easily assembled ventilation duct, including a first main pipe 2 and a second main pipe 3 coaxially connected. The first main pipe 2 has inwardly offset support steps 23 on both sides inside, and a first sealing ring 1 is provided on the support steps 23. The first main pipe 2 also has inwardly offset retaining teeth 24 inside, which are axially spaced from the support steps 23 to accommodate the first sealing ring 1. When the first sealing ring 1 is installed on the support steps 23, the retaining teeth 24 can abut against the surface of the first sealing ring 1 to limit its position and prevent it from falling off. The outer periphery of the first main pipe 2 has at least one pair of connecting ports 21 communicating with the inner cavity. Above the connecting ports 21 are outwardly protruding connecting protrusions 22, and drive arms 4 are hinged to the two connecting protrusions 22 respectively. One end of the drive arm 4 is eccentrically connected to the connecting protrusion 22 via a rotating shaft, and the other end extends outward to form a drive end. A cam 41 is provided at one end of the drive arm 4 near the rotating shaft. The eccentricity of the cam 41 can change the distance between the cam 41 and the center of the first main pipe 2 as the drive arm 4 rotates, thereby generating radial displacement during rotation.

[0019] The second main pipe 3 has slidable secondary pipes 5 on both sides inside. Each secondary pipe 5 has an annular groove 51 on its outer circumference, and a second sealing ring 6 is embedded within the groove. The outer wall of the end of the secondary pipe 5 is designed as a bevel or arc surface, contacting the cam 41 of the first main pipe 2. During assembly, the secondary pipe 5 of the second main pipe 3 is inserted into the interior of the first main pipe 2. The drive arm 4 is manually rotated around its axis, causing the cam 41 to move towards the center of the first main pipe 2. The radial displacement of the cam 41 pushes the secondary pipe 5 to slide axially towards the first sealing ring 1 until the secondary pipe 5 presses against the first sealing ring 1. At this time, the second sealing ring 6 on the secondary pipe 5 simultaneously presses against the inner wall of the second main pipe 3, forming a double sealing structure. This prevents leakage from the junction between the secondary pipe 5 and the second main pipe 3, and from the junction between the secondary pipe 5 and the first main pipe 2, during airflow.

[0020] In this embodiment, when the drive arm 4 is rotated to push the secondary pipe 5 to move axially, the second sealing ring 6 and the inner wall of the second main pipe 3 will move relative to each other, generating friction. To make it easier to manually rotate the drive arm 4, an outward-facing mounting groove 42 is provided inside the drive end. A slidable extension rod 7 is inserted into the groove. By pulling out the extension rod 7, the length of the operating lever arm can be increased, reducing the torque required to rotate the drive arm 4, thus facilitating the application of force. In addition, the mounting groove 42 and the extension rod 7 are limited by the friction generated when they move in opposite directions.

[0021] As described above, this solution uses the lever action of the drive arm 4 to convert the external rotation operation into the axial clamping force of the secondary pipe 5. The eccentric cam 41 self-locks after reaching the predetermined position, ensuring continuous pressure on the sealing ring. The double seal of the first sealing ring 1 and the second sealing ring 6 effectively prevents gas leakage, replacing the cumbersome steps of traditional screw and nut connections. During assembly, only rotating the drive arm 4 is needed to complete the sealing and fixing, significantly improving efficiency, and making it particularly suitable for ventilation systems that require frequent disassembly and assembly.

[0022] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An easily assembled ventilation duct, characterized in that, It includes a first main pipe and a second main pipe. The first main pipe has a first sealing ring on both sides inside. The first main pipe has at least one pair of driving arms on its outer periphery. The second main pipe has slidable auxiliary pipes on both sides inside. The driving arms rotate to push the auxiliary pipes toward the first sealing ring and press against the first sealing ring.

2. The easily assembled ventilation duct according to claim 1, characterized in that, The outer periphery of the first main pipe is provided with a connection port that communicates with the inner wall of the first main pipe. Symmetrically protruding connection protrusions are provided above the connection port. One end of the drive arm is rotatably connected to the connection protrusion, and the other end extends outward as the drive end. The end of the drive arm located away from the drive end is provided with a cam. The cam is eccentrically connected to the connection protrusion. The cam is rotated by the drive arm to move closer to or away from the center of the first main pipe.

3. The easily assembled ventilation duct according to claim 1, characterized in that, The first main pipe has an inwardly offset support step inside, which is used to support the first sealing ring. The first main pipe also has an inwardly offset locking tooth inside, which is spaced apart from the support step along the axial direction. The locking tooth abuts against the surface of the first sealing ring to limit the position of the first sealing ring.

4. The easily assembled ventilation duct according to claim 1, characterized in that, The outer periphery of the secondary conduit is provided with an annular groove, and a second sealing ring is embedded in the annular groove.

5. The easily assembled ventilation duct according to claim 2, characterized in that, The drive end is provided with an outward-facing mounting groove, and an extension rod adapted to the mounting groove is provided in the mounting groove. The extension rod can slide along the extension direction of the mounting groove.

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