Elbow three-way pipe fitting

Abstract

The utility model belongs to the technical field of pipeline fittings, in particular to an elbow three-way pipe fitting which comprises a main pipe body, the main pipe body is of a right-angled elbow structure formed by bending a straight pipe by 90 degrees, and the two ends of the main pipe body are respectively extended straight line ends formed by linearly extending outwards in the axial direction of the main pipe body. The corner of the main pipe body locally deforms outwards through hydraulic pressure to form a protruding part, the inner diameter of the protruding part is smaller than that of the main pipe body, the end of the protruding part is horizontally cut to form a bypass port communicated with an inner cavity of the main pipe body, and the axis of the protruding part is perpendicular to the axes of the two extending linear ends. An annular reinforcing boss with the outer diameter larger than that of the protruding part is arranged at the joint of the protruding part and the main pipe body. According to the utility model, the structure is simple, the design is reasonable, the cost is low, the convex part and the branch port are directly formed at the corner of the main pipe body by means of a hydraulic forming mode, and the supporting strength of the extension part is increased by means of the annular reinforcing boss.

Description

Technical fields:

[0001] This utility model belongs to the field of pipeline fittings technology, and specifically refers to a elbow tee fitting. Background technology:

[0002] Currently, the three passages of a standard tee fitting are all in one plane. However, in actual piping systems, it is often necessary to have three connections in the X, Y, and Z directions of a Cartesian coordinate system. The current method to meet this requirement is usually to connect an elbow and a standard tee. However, this approach has drawbacks: it increases the number of components, raises costs, increases the workload of installation and disassembly, and also increases the risk of pipe leaks. Summary of the Invention:

[0003] The purpose of this utility model is to provide a bend tee fitting, which uses hydroforming to directly form a protrusion and a side branch port at the corner of the main body, and relies on annular reinforcing bosses to increase the support strength of the extension.

[0004] This utility model is implemented as follows:

[0005] A bend tee fitting includes a main body, which is a right-angle bend structure formed by bending a straight pipe at 90°. Both ends of the main body are extended straight ends that extend linearly outward along their axial direction. At the corner of the main body, a protrusion is formed by hydraulically deforming outward. The inner diameter of the protrusion is smaller than the inner diameter of the main body. The end of the protrusion is horizontally cut to form a side port that communicates with the inner cavity of the main body. The axis of the protrusion is perpendicular to the axes of the two extended straight ends. An annular reinforcing boss with an outer diameter larger than the outer diameter of the protrusion is provided at the connection between the protrusion and the main body.

[0006] In the aforementioned elbow tee fitting, the annular reinforcing boss is formed by an annular reinforcing ring sleeved on the protrusion and the two being fixed by hot-melt welding.

[0007] In the aforementioned elbow tee fitting, both extended straight ends of the main pipe are flared outwards to form a flared structure.

[0008] In the aforementioned elbow tee fitting, the diameter of one extended straight end port of the main pipe is larger than the diameter of the other extended straight end port.

[0009] In the aforementioned elbow tee fitting, the ratio of the inner diameter of the protrusion to the inner diameter of the main pipe is 0.6:1-0.8:1.

[0010] In the aforementioned elbow tee fitting, the main pipe is a copper pipe made of copper alloy, and the wall thickness of the main pipe is 1.0mm-2.5mm with a uniform error of less than or equal to 0.2mm.

[0011] The outstanding advantages of this utility model compared to the prior art are:

[0012] This utility model has a simple structure, reasonable design and low cost. It uses hydroforming to directly form protrusions and side ports at the corners of the main body, and relies on annular reinforcing bosses to increase the support strength of the extension. It can not only meet the joint requirements in the X, Y and Z directions, but also has an integrated structure with reliable overall structure and high strength. Attached image description:

[0013] Figure 1 This is a three-dimensional view of the entire utility model.

[0014] In the diagram: 1. Main body; 2. Extended straight end; 3. Protrusion; 4. Side branch port; 5. Annular reinforcing boss. Detailed implementation method:

[0015] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 :

[0016] A bend tee fitting includes a main body 1, which is a right-angle bend structure formed by bending a straight pipe by 90°. The two ends of the main body 1 are extended straight ends 2 that extend linearly outward along its axial direction. At the corner of the main body 1, a protrusion 3 is formed by hydraulically deforming outward. The inner diameter of the protrusion 3 is smaller than the inner diameter of the main body 1. The end of the protrusion 3 is horizontally cut to form a side port 4 that communicates with the inner cavity of the main body 1. The axis of the protrusion 3 is perpendicular to the axes of the two extended straight ends 2. An annular reinforcing boss 5 with an outer diameter larger than the outer diameter of the protrusion 3 is provided at the connection between the protrusion 3 and the main body 1.

[0017] This utility model has a simple structure, reasonable design and low cost. It uses hydroforming to directly form a protrusion 3 and a side branch port 4 at the corner of the main body 1, and relies on the annular reinforcing boss 5 to increase the support strength of the extension. It can not only meet the joint requirements in the three directions of space X, Y and Z, but also has an integrated structure with reliable overall structure and high strength.

[0018] Furthermore, the specific structure of the annular reinforcing boss 5 on the protrusion 3 is as follows: the annular reinforcing boss 5 is formed by an annular reinforcing ring sleeved on the protrusion 3 and the two being fixed by hot-melt welding.

[0019] Furthermore, to facilitate connection and integration with external pipelines, both extended straight ends 2 of the main pipe body 1 are flared outwards to form a flared structure. In this embodiment, the diameter of one extended straight end 2 is larger than the diameter of the other extended straight end 2. Moreover, to achieve an asymmetrical flaring design and avoid fluid disturbances caused by symmetrical flaring, the flaring angle of the larger-diameter extended straight end 2 is greater than the flaring angle of the smaller-diameter extended straight end 2 in this embodiment.

[0020] Furthermore, the ratio of the inner diameter of the protrusion 3 to the inner diameter of the main body 1 is 0.6:1-0.8:1.

[0021] Furthermore, in this embodiment, the main tube 1 is a copper tube made of copper alloy, and the wall thickness of the main tube 1 is 1.0mm-2.5mm with a uniform error of less than or equal to 0.2mm.

[0022] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An elbow tee pipe fitting, characterized by: It includes a main body (1), which is a right-angle elbow structure formed by bending a straight pipe by 90°. The two ends of the main body (1) are extended straight ends (2) that extend linearly outward along its axial direction. The corner of the main body (1) is formed by hydraulic local deformation to form a protrusion (3). The inner diameter of the protrusion (3) is smaller than the inner diameter of the main body (1). The end of the protrusion (3) is formed by horizontal cutting to form a side branch port (4) that communicates with the inner cavity of the main body (1). The axis of the protrusion (3) and the axis of the two extended straight ends (2) are set perpendicular to each other. An annular reinforcing boss (5) with an outer diameter larger than the outer diameter of the protrusion (3) is provided at the connection between the protrusion (3) and the main body (1). The annular reinforcing boss (5) is formed by an annular reinforcing protrusion sleeved on the protrusion (3) and the two are fixed by hot melt welding; The ratio of the inner diameter of the protrusion (3) to the inner diameter of the main body (1) is 0.6:1-0.8:

1.

2. A bend tee pipe fitting according to claim 1, wherein: Both extended straight ends (2) of the main body (1) are flared outward to form a flared structure.

3. A bend-tee according to claim 1 or 2, characterised in that: The diameter of one of the extended straight ends (2) of the main body (1) is larger than the diameter of the other extended straight end (2).

4. A bend tee pipe fitting as defined in Claim 1, wherein: The main body (1) is a copper tube made of copper alloy. The wall thickness of the main body (1) is 1.0 mm - 2.5 mm and its uniform error is less than or equal to 0.2 mm.

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