Flute-shaped branch pipe with flanging hole limiting welding structure

Abstract

The utility model discloses a flute-shaped branch pipe with a turnup hole limiting welding structure, which comprises a main pipe, a plurality of limiting holes are arranged on the main pipe, branch pipes are inserted into the limiting holes, upper and lower ports of the limiting holes are of turnup structures, and a step limiting structure is arranged on the inner side of the lower port of each limiting hole. By means of the novel lower flanging hole limiting welding structure, it is guaranteed that the upper portion and the lower portion of a pipe are both flanged, meanwhile, the lower flanging is provided with step limiting, the welding contact area is increased, point and pier ring limiting is not needed, and the welding leakage problem is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field, in particular to a flute-shaped branch pipe with a flanging hole limiting welding structure. Background Art

[0002] Branch pipes, also known as central air conditioning branch pipes, splitters, and splitters. As the name suggests, it is a pipe with one input but multiple outputs. It is mainly used in the pipe installation of central air conditioning VRV systems. Its function is to divert the refrigerant in the pipe to the indoor unit in the central air conditioning multi-split installation system, playing a diversion role.

[0003] At present, there are two types of flute branch pipe welding structures. The first type is that the main pipe uses a flanging hole or a hole plus a branch pipe convex point to limit the position. The second type of main pipe uses a flanging hole or a hole plus a branch pipe pier ring to limit the position. Both types of structures require branch pipes to be limited during welding. In the first type of branch pipe convex point limiting structure, the convex point size is not well controlled, which is prone to cracks or breakdown, and eventually leads to leakage and affects performance. In the second type of pier ring limiting structure, the pier ring will block the hole, and it is difficult to add solder during welding. In order to solve the above problems, it is urgent to improve the design of the flute branch pipe welding structure. Utility Model Content

[0004] The purpose of the utility model is to provide a flute-shaped branch pipe with a flange hole limiting welding structure to solve the problems raised in the above-mentioned background technology.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A flute-shaped branch pipe with a flanging hole limiting welding structure comprises a main pipe, a plurality of limiting holes are opened on the main pipe, branch pipes are inserted into the limiting holes, the upper and lower ends of the limiting holes are both flanging structures, and a step limiting structure is provided on the inner side of the lower end of the limiting hole.

[0007] Preferably, the upper / lower ports of the limiting hole both extend outwardly / inwardly of the main pipe.

[0008] Preferably, the lower port of the limiting hole adopts a structure in which the inner diameter gradually decreases from top to bottom.

[0009] Preferably, the plurality of limiting holes are distributed in a linear array.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0011] In the utility model, a novel lower flange hole limiting welding structure is used to ensure that the pipe has flanges on the upper and lower sides. At the same time, the lower flange has a step limit, which increases the welding contact area, does not require point and pier ring limits, and reduces welding leakage problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 It is an enlarged view of the structure at B of the utility model;

[0015] Figure 4 It is a cross-sectional view of the main pipe of the utility model;

[0016] Figure 5 This is a schematic diagram of the connection between the main pipe and the branch pipe of the utility model;

[0017] In the figure: 1. Main pipe; 2. Branch pipe; 3. Limiting hole. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] Example:

[0020] A flute-shaped branch pipe with a flanged hole limiting welding structure, such as Figure 1-5 As shown, it includes a main pipe 1, a plurality of limiting holes 3 are opened on the main pipe 1, branch pipes 2 are inserted into the limiting holes 3, the upper and lower ends of the limiting holes 3 are both flanged structures, and a step limiting structure is provided inside the lower end of the limiting hole 3.

[0021] In a possible implementation manner, the upper / lower ports of the limiting hole 3 both extend outward / inward of the main pipe 1 .

[0022] In a possible implementation manner, the lower end of the limiting hole 3 adopts a structure in which the inner diameter gradually decreases from top to bottom.

[0023] In a possible implementation, the plurality of limiting holes 3 are distributed in a linear array.

[0024] In a possible implementation, the branch pipe 2 is inserted from the upper end of the limiting hole 3, the lower end of the branch pipe 2 contacts the inner step surface of the lower end of the limiting hole 3 to achieve limiting, and then solder is added from the gap between the upper end of the limiting hole 3 and the branch pipe 2 to perform welding.

[0025] By adopting the above technical solution:

[0026] By processing and forming the flanging hole of the flute-shaped branch pipe main pipe, the formed hole forms upper and lower flanges, and at the same time, the lower flanging hole forms a taper limit. Through the taper limit of the lower flanging hole, the branch pipe limit is cancelled, and the purpose of improving the welding leakage quality can be achieved at the same time. The taper limit can effectively control the problem of inflow welding.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flute-shaped branch pipe with a flanged hole limiting welding structure, characterized in that: The invention comprises a main pipe (1), a plurality of limiting holes (3) are formed on the main pipe (1), a branch pipe (2) is inserted into the limiting holes (3), the upper and lower ends of the limiting holes (3) are both flanged structures, and a step limiting structure is provided inside the lower end of the limiting holes (3).

2. A flute-shaped branch pipe with a flanged hole limiting welding structure as claimed in claim 1, characterized in that: The upper / lower ports of the limiting hole (3) both extend outward / inward of the main pipe (1).

3. A flute-shaped branch pipe with a flanged hole limiting welding structure as claimed in claim 1, characterized in that: The lower end of the limiting hole (3) adopts a structure in which the inner diameter gradually decreases from top to bottom.

4. The flute-shaped branch pipe with a flanged hole limiting welding structure according to claim 1, characterized in that: The plurality of limiting holes (3) are distributed in a linear array.

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