High-density polyethylene (HDPE) fresh air pipe reducer union

Abstract

The utility model discloses an HDPE fresh air pipe reducer union which comprises a small-diameter connecting pipe, a large-diameter connecting pipe and a middle transition pipe connecting the small-diameter connecting pipe and the large-diameter connecting pipe, a first clamping ring is arranged on the inner side of the connecting position of the small-diameter connecting pipe and the middle transition pipe, and a second clamping ring is arranged on the inner side of the connecting position of the large-diameter connecting pipe and the middle transition pipe. U-shaped multi-point clamping grooves are formed in the inner side, away from the first clamping ring by a preset distance, of the small-diameter connecting pipe and the inner side, away from the second clamping ring by a preset distance, of the large-diameter connecting pipe and used for positioning the O-shaped sealing ring. The small-diameter connecting pipe and the large-diameter connecting pipe are used for being connected with reducing pipelines at the two ends respectively. According to the utility model, the U-shaped multi-point clamping groove is arranged, so that the fresh air pipe can be conveniently inserted and positioned; and the groove bottom is provided with a plurality of convex ribs, so that the sealing ring is fixed more firmly, and the sealing effect is better. The HDPE fresh air pipe reducer union can be matched with an O-shaped sealing ring, the sealing effect is better, fixation is firmer, and glue or an adhesive tape is prevented from being used for fixing and sealing.

Description

Technical Field

[0001] The utility model belongs to the technical field of fresh air system installation, and particularly relates to a HDPE fresh air pipe reducer joint. Background Art

[0002] When installing and connecting a fresh air conditioner, different pipe diameter changes may occur, and in this case, a fresh air pipe reducer joint is required and used in conjunction with a flat seal ring. When the traditional reducer joint is connected, the flat seal ring may not be sealed properly, posing a risk of air leakage, and glue or tape is needed for fixing and sealing. While adding additional processes, the effect is difficult to guarantee. Therefore, a new type of fresh air pipe reducer joint needs to be designed to meet the sealing requirements during connection. Content of the Utility Model

[0003] In view of the above problems, the utility model provides a HDPE fresh air pipe reducer joint to solve the technical problems such as improper sealing and air leakage existing in the connection of traditional reducer joints.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] A HDPE fresh air pipe reducer joint includes a small-diameter connecting pipe, a large-diameter connecting pipe, and a middle transition pipe connecting the small-diameter connecting pipe and the large-diameter connecting pipe. A first snap ring is arranged inside the connection between the small-diameter connecting pipe and the middle transition pipe, and a second snap ring is arranged inside the connection between the large-diameter connecting pipe and the middle transition pipe. U-shaped multi-point card slots are arranged inside the small-diameter connecting pipe at a predetermined distance from the first snap ring and inside the large-diameter connecting pipe at a predetermined distance from the second snap ring, for positioning an O-ring seal.

[0006] Further, the small-diameter connecting pipe and the large-diameter connecting pipe are respectively used to connect with the pipes with different diameters at both ends. External threads are arranged on the outer surface of the pipes, and the O-ring seal is arranged inside the teeth of the external threads.

[0007] Further, the U-shaped multi-point card slots are arranged inside the small-diameter connecting pipe and the large-diameter connecting pipe, and include an inclined surface, a bottom surface, and a vertical surface. The inclined surface faces the outer end direction of the corresponding small-diameter connecting pipe and large-diameter connecting pipe.

[0008] Further, chamfer structures are arranged at the outer ends of the small-diameter connecting pipe and the large-diameter connecting pipe, facilitating the insertion and installation of the fresh air pipe.

[0009] Further, several convex rib strips are arranged on the bottom surface of the U-shaped multi-point card slots.

[0010] Further, the O-ring seal is arranged inside the U-shaped multi-point card slots, and the O-ring seal is squeezed and positioned by the convex rib strips.

[0011] The technical solution of the utility model has the following beneficial effects:

[0012] (1) The irregular U-shaped multi-point card slots of the sealing ring are arranged, which is convenient for the socket positioning of the fresh air pipe.

[0013] (2) Chamfers are arranged at the orifice of the card slot, which is convenient for the socket installation of the fresh air pipe.

[0014] (3) Multiple convex rib bars are arranged at the bottom of the slot, so that the sealing ring is fixed more firmly and the sealing effect is better.

[0015] The HDPE fresh air pipe reducer joint of the utility model can be adapted to an O-shaped sealing ring, with better sealing effect and firmer fixation, avoiding the use of glue or tape for fixing and sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall schematic diagram of the HDPE fresh air pipe reducer joint of the utility model;

[0017] Figure 2 is the cross-sectional view - 1 of the HDPE fresh air pipe reducer joint of the utility model;

[0018] Figure 3 is the cross-sectional view - 2 of the HDPE fresh air pipe reducer joint of the utility model;

[0019] Figure 4 is Figure 3 the enlarged detail view of the U-shaped multi-point card slot in ;

[0020] Figure 5 is the structural schematic diagram of the O-shaped sealing ring;

[0021] Figure 6 is the structural schematic diagram of the fresh air pipes to be connected at both ends of the reducer joint;

[0022] Figure 7 is the schematic diagram of the mating connection structure of the HDPE fresh air pipe reducer joint of the utility model;

[0023] Figure 8 is Figure 7 the cross-sectional view of ;

[0024] Figure 9 is Figure 8 the enlarged detail view of the mating connection between the O-shaped sealing ring and the U-shaped multi-point card slot in ;

[0025] In the figure: 1, small-diameter connecting pipe; 2, large-diameter connecting pipe; 3, middle transition pipe; 4, first snap ring; 5, second snap ring; 6, U-shaped multi-point card slot; 61, inclined surface; 62, bottom surface; 63, vertical surface; 64, convex rib bar; 7, O-shaped sealing ring; 8, pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope protected by the present utility model.

[0027] As Figures 1-6 shown, an HDPE fresh air pipe reducer joint includes a small-diameter connecting pipe 1, a large-diameter connecting pipe 2, and a middle transition pipe 3 connecting the small-diameter connecting pipe 1 and the large-diameter connecting pipe 2. A first snap ring 4 is provided inside the connection between the small-diameter connecting pipe 1 and the middle transition pipe 3, and a second snap ring 5 is provided inside the connection between the large-diameter connecting pipe 2 and the middle transition pipe 3. U-shaped multi-point clamping grooves 6 are provided inside the small-diameter connecting pipe 1 at a predetermined distance from the first snap ring 4 and inside the large-diameter connecting pipe 2 at a predetermined distance from the second snap ring 5 for positioning an O-ring 7. The small-diameter connecting pipe 1 and the large-diameter connecting pipe 2 are respectively used to connect with pipes 8 with variable diameters at both ends. External threads are provided on the outer surface of the pipe 8, and the O-ring 7 is arranged in the teeth of the external threads.

[0028] The U-shaped multi-point clamping grooves 6 are provided inside the small-diameter connecting pipe 1 and the large-diameter connecting pipe 2, and include an inclined surface 61, a bottom surface 62, and a vertical surface 63. The inclined surface 61 faces the outer end direction of the corresponding small-diameter connecting pipe 1 or large-diameter connecting pipe 2.

[0029] Preferably, chamfer structures are provided at the outer ends of the small-diameter connecting pipe 1 and the large-diameter connecting pipe 2 to facilitate the insertion and installation of the fresh air pipe.

[0030] To increase the installation sealing performance of the O-ring, several convex rib strips 64 are provided on the bottom surface 62 of the U-shaped multi-point clamping grooves 6. The O-ring 7 is arranged in the U-shaped multi-point clamping grooves 6, and the O-ring 7 is squeezed and positioned by the convex rib strips 64.

[0031] As Figures 7-9As shown, when the HDPE fresh air pipe reducer joint of the present utility model is in use, it is used in cooperation with the O-ring seal 7 and the pipe 8 to be connected. During assembly, the O-ring seal 7 is sleeved into the third tooth of the pipe 8 to form an assembly. The assembly of the O-ring seal 7 and the pipe 8 is inserted into the port of the small-diameter connecting pipe 1 of the reducer joint of the present application. When the front end of the pipe 8 reaches the position of the first snap ring 4, the O-ring seal 7 correspondingly reaches the U-shaped multi-point card slot 6 part inside the small-diameter connecting pipe 1. After the O-ring seal 7 pops out, it is squeezed and positioned by the rib 64 in the U-shaped multi-point card slot 6, so that there is no gap between the O-ring seal 7 and the U-shaped multi-point card slot 6, and the assembly of one end is completed. Similarly, the assembly of one end of the large-diameter connecting pipe 2 is completed in the same way.

[0032] The HDPE fresh air pipe reducer joint of the present utility model can be adapted to the O-ring seal, with better sealing effect and firmer fixation, avoiding the use of glue or tape for fixed sealing.

[0033] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A HDPE fresh air duct reducer, characterized in that: The invention comprises a small-diameter connecting pipe (1), a large-diameter connecting pipe (2), and a middle transition pipe (3) connecting the small-diameter connecting pipe (1) and the large-diameter connecting pipe (2); a first clamping ring (4) is arranged on the inner side of the connection between the small-diameter connecting pipe (1) and the middle transition pipe (3); a second clamping ring (5) is arranged on the inner side of the connection between the large-diameter connecting pipe (2) and the middle transition pipe (3); and U-shaped multi-point clamping grooves (6) are arranged on the inner side of the small-diameter connecting pipe (1) at a predetermined distance from the first clamping ring (4) and on the inner side of the large-diameter connecting pipe (2) at a predetermined distance from the second clamping ring (5) for positioning an O-type sealing ring (7).

2. The HDPE fresh air duct reducer according to claim 1, characterized in that: The small-diameter connecting pipe (1) and the large-diameter connecting pipe (2) are respectively used to connect to a pipe (8) with reduced diameters at both ends; the outer surface of the pipe (8) is provided with an external thread, and an O-ring (7) is provided in the teeth of the external thread.

3. The HDPE fresh air duct reducer according to claim 2, characterized in that: The U-shaped multi-point card slot (6) is arranged on the inner side of the small-diameter connecting tube (1) and the large-diameter connecting tube (2), and comprises an inclined surface (61), a bottom surface (62) and a vertical surface (63), wherein the inclined surface (61) faces the outer end direction of the corresponding small-diameter connecting tube (1) or the large-diameter connecting tube (2).

4. The HDPE fresh air duct reducer according to claim 3, characterized in that: The outer ends of the small-diameter connecting pipe (1) and the large-diameter connecting pipe (2) are provided with chamfered structures to facilitate socket-and-spigot installation of the fresh air pipe.

5. The HDPE fresh air duct reducer according to claim 3, characterized in that: A plurality of convex ribs (64) are provided on the bottom surface (62) of the U-shaped multi-point card slot (6).

6. The HDPE fresh air duct reducer according to claim 5, characterized in that: The O-type sealing ring (7) is arranged in the U-shaped multi-point clamping groove (6), and the O-type sealing ring (7) is squeezed and positioned by the convex rib (64).

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