Tee joint

Abstract

The utility model belongs to the technical field of pipe fittings, and particularly relates to a tee joint which comprises a metal main pipe and a metal branch pipe, a circular hole is formed in the side wall of the metal main pipe, and a first outward flanging is arranged on the peripheral wall of the circular hole. The inner diameter of one end of the metal branch pipe is matched with the outer diameter of the first outer flanging or the outer diameter of one end of the metal branch pipe is matched with the inner diameter of the first outer flanging, and the metal branch pipe is connected to the first outer flanging in a sleeved mode and connected with the first outer flanging in a welded mode. The method is suitable for processing the tee joint by adopting a stainless steel pipe or a common straight carbon steel pipe or a red copper pipe.

Description

Technical Field

[0001] This utility model belongs to the field of pipe fittings technology, and in particular relates to a tee. Background Technology

[0002] Heat exchangers for air conditioners or refrigeration units typically use copper tee tubes, which are processed by water pressure or lead filling. This process results in high material and processing costs, and the lead filling process is not environmentally friendly.

[0003] However, with the significant increase in the price of copper, it has become urgent to replace the existing copper tees with stainless steel or ordinary carbon steel tees for the connecting pipes and refrigeration components inside air conditioners. However, since the strength of stainless steel or ordinary carbon steel is 4 to 5 times that of copper, if the structural design of stainless steel or ordinary carbon steel tees is based on that of copper tees, the processing difficulty will be greater and the processing cost will be higher. Summary of the Invention

[0004] The purpose of this invention is to provide a tee that is easy to process and has low production cost.

[0005] The purpose of this utility model is to solve the following problem:

[0006] A tee includes a main metal pipe and a branch metal pipe. A circular hole is provided on the side wall of the main metal pipe, and a first outward flange is provided on the peripheral wall of the circular hole. The inner diameter of one end of the branch metal pipe matches the outer diameter of the first outward flange, or the outer diameter of one end of the branch metal pipe matches the inner diameter of the first outward flange. The branch metal pipe is sleeved on the first outward flange and connected by welding.

[0007] As a further optimization of the above technical solution, the main metal pipe is a bent pipe, and the bend of the main metal pipe has a rounded transition.

[0008] As a further optimization of the above technical solution, the main metal tube is a right-angle tube, a U-shaped tube, or a tube bent into an S-shape.

[0009] As a further optimization of the above technical solution, the upper part of the first outer flange of the main metal pipe is expanded to form an expanded diameter section, and a limiting platform is formed at the junction of the first outer flange and the expanded diameter section. The outer diameter of one end of the metal branch pipe matches the inner diameter of the expanded diameter section of the first outer flange, and one end of the metal branch pipe is engaged with the limiting platform.

[0010] As a further optimization of the above technical solution, an annular protrusion is provided on the inner wall of the first outer flange of the main metal pipe, and the outer diameter of one end of the metal branch pipe matches the inner diameter of the first outer flange, and one end of the metal branch pipe is engaged with the annular protrusion.

[0011] As a further optimization of the above technical solution, an annular protrusion is provided on the outer wall of one end of the metal branch pipe, and the outer diameter of one end of the metal branch pipe matches the inner diameter of the first outer flange. The annular protrusion on the metal branch pipe is engaged with the upper end of the first outer flange.

[0012] As a further optimization of the above technical solution, the corner of the metal main tube and the first outward flange on the metal main tube are smoothly transitioned.

[0013] As a further optimization of the above technical solution, the main metal pipe and the branch metal pipe are made of stainless steel, ordinary carbon steel or copper.

[0014] As a further optimization of the above technical solution, a second outward flange is provided at one end of the metal branch pipe, the inner diameter of one end of the metal branch pipe matches the outer diameter of the first outward flange, and the lower end face of the second outward flange is attached to the outer wall of the main metal pipe and connected by welding.

[0015] As a further optimization of the above technical solution, the second outer flange has a saddle shape that can fit against the outer wall of the metal main pipe.

[0016] Compared with the general processing technology of copper tee pipes, the outstanding advantages of this utility model are:

[0017] 1. The materials used in this utility model are stainless steel pipe, ordinary carbon steel pipe, or copper pipe, which results in low processing cost and high production efficiency.

[0018] 2. The tees of this utility model are all made of stainless steel pipe, ordinary carbon steel pipe or copper pipe. The processing technology is to first draw the end to form an outward flange, and then use a bending process to bend the metal main pipe into a right-angle pipe, a U-shaped pipe or an S-shaped pipe. The processing technology is simple.

[0019] 3. The second outer flange of the metal branch pipe of this utility model is designed in a saddle shape, which increases the welding length of the solder, the welding depth meets the requirements, the welding sealing is good, the welding strength is high, and the reliability is high.

[0020] 4. This utility model is applicable to the processing of tees using stainless steel pipes, ordinary carbon steel pipes, or copper pipes. Attached Figure Description

[0021] Figure 1 This is a partial cross-sectional view of one embodiment of the present utility model.

[0022] Figure 2 yes Figure 1 Enlarged view of part A.

[0023] Figure 3 This is a partial cross-sectional view of a second embodiment of the present utility model.

[0024] Figure 4 yes Figure 1 Enlarged view of part B.

[0025] Figure 5 This is a partial cross-sectional view of the metal main tube of this utility model, which is a U-shaped tube.

[0026] Figure 6 This is a partial cross-sectional view of the metal main tube of this utility model, which is an S-shaped tube.

[0027] Figure 7 This is a front view of the metal branch pipe of this utility model, where the second outer flange is saddle-shaped.

[0028] Figure 8 This is a partial cross-sectional view of the metal main pipe of this utility model, in which the upper part of the first outward flange is provided with an enlarged diameter section and is connected to the metal branch pipe.

[0029] Figure 9 This is a partial cross-sectional view of the inner wall of the first outward flange of the metal main pipe of this utility model, which has an annular protrusion and is connected to the metal branch pipe.

[0030] Figure 10 This is a partial cross-sectional view of the outer wall of the metal branch pipe of this utility model, which has an annular protrusion that is connected to the first outward flange on the main metal pipe. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 1-10 :

[0032] Example 1:

[0033] A tee includes a main metal pipe 10 and a branch metal pipe 20. The main metal pipe 10 has a circular hole 13 on its side wall, and a first outward flange 12 is provided on the peripheral wall of the circular hole 13. The inner diameter D1 of one end of the branch metal pipe 20 matches the outer diameter D2 of the first outward flange 12, or the outer diameter D5 of one end of the branch metal pipe 20 matches the inner diameter D6 of the first outward flange 12. The branch metal pipe 20 is sleeved on the first outward flange 12 and connected by welding.

[0034] As a further optimization of the above technical solution, the metal main pipe 10 is a bent pipe, and the bend of the metal main pipe 10 has a rounded transition.

[0035] As a further optimization of the above technical solution, the metal main tube 10 is a right-angle tube, a U-shaped tube, or an S-shaped tube.

[0036] See Figure 8As a further optimization of the above technical solution, the upper part of the first outer flange 12 of the main metal pipe 10 is expanded to form an expanded diameter section 26, and a limiting platform 25 is formed at the junction of the first outer flange 12 and the expanded diameter section 26. The outer diameter D3 of one end of the metal branch pipe 20 is matched with the inner diameter D4 of the first outer flange expanded diameter section 26, and one end of the metal branch pipe 20 is snapped onto the limiting platform 25.

[0037] See Figure 9 As a further optimization of the above technical solution, an annular protrusion 28 is provided on the inner wall of the first outer flange 12 of the main metal pipe 10, and the outer diameter D5 of one end of the metal branch pipe 20 is matched with the inner diameter D6 of the first outer flange 12, and one end of the metal branch pipe 20 is snapped onto the annular protrusion 28.

[0038] See Figure 10 As a further optimization of the above technical solution, an annular protrusion 29 is provided on the outer wall of one end of the metal branch pipe 20. The outer diameter D7 of one end of the metal branch pipe 20 is matched with the inner diameter D8 of the first outer flange 12. The annular protrusion 29 on the metal branch pipe 20 is engaged with the upper end of the first outer flange 12.

[0039] See Figure 10 As a further optimization of the above technical solution, the corner 30 of the metal main tube 10 and the first outer flange 12 on the metal main tube 10 is smoothly transitioned.

[0040] As a further optimization of the above technical solution, the main metal pipe 10 and the branch metal pipe 20 are made of stainless steel, ordinary carbon steel or copper.

[0041] Example 2:

[0042] The structure of this embodiment is mostly the same as that of embodiment 1, except that: a second outward flange 23 is provided at one end of the metal branch pipe 20, the inner diameter of one end of the metal branch pipe 20 matches the outer diameter of the first outward flange, and the lower end face 24 of the second outward flange 23 is attached to the outer wall of the metal main pipe 10 and connected by welding.

[0043] As a further optimization of the above technical solution, the second outer flange 23 has a saddle shape that can fit against the outer wall of the metal main pipe 10.

[0044] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that simple substitutions or modifications can still be made to the technical solutions or technical features described in the foregoing embodiments, and these simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and substance of the technical solutions of the embodiments of this utility model, and are still within the protection scope of this utility model.

Claims

1. A tee fitting comprising a metal main pipe and a metal branch pipe, characterized by: The metal main pipe is provided with a circular hole in the side wall, and the peripheral wall of the circular hole is provided with a first outwardly turned edge, the inner diameter of one end of the metal branch pipe matches the outer diameter of the first outwardly turned edge or the outer diameter of one end of the metal branch pipe matches the inner diameter of the first outwardly turned edge, and the metal branch pipe is sleeved on the first outwardly turned edge and connected by welding.

2. A tee according to claim 1, characterized in that: The metal main pipe is a bent pipe, and the bent part of the metal main pipe is roundly transitioned.

3. A tee according to claim 2, wherein: The metal main pipe is a right-angle pipe or a U-shaped pipe or an S-shaped pipe.

4. The tee according to claim 1, wherein: The upper part of the first outwardly turned edge of the metal main pipe is expanded in diameter to form an expanded diameter part, the transition part of the first outwardly turned edge and the expanded diameter part forms a limiting platform, the outer diameter of one end of the metal branch pipe matches the inner diameter of the expanded diameter part of the first outwardly turned edge, and one end of the metal branch pipe is clamped on the limiting platform.

5. The tee according to claim 1, wherein: The inner wall of the first outwardly turned edge of the metal main pipe is provided with an annular protrusion, the outer diameter of one end of the metal branch pipe matches the inner diameter of the first outwardly turned edge, and one end of the metal branch pipe is clamped on the annular protrusion.

6. The tee according to claim 1, wherein: The outer wall of one end of the metal branch pipe is provided with an annular protrusion, the outer diameter of one end of the metal branch pipe matches the inner diameter of the first outwardly turned edge, and the annular protrusion on the metal branch pipe is clamped on the upper end of the first outwardly turned edge.

7. The tee according to claim 1, wherein: The corner of the metal main pipe and the first outwardly turned edge on the metal main pipe is smoothly transitioned.

8. The tee according to claim 1, wherein: The metal main pipe and the metal branch pipe are made of stainless steel, ordinary carbon steel or red copper.

9. A tee according to any one of claims 1 to 8, wherein: The end of one end of the metal branch pipe is provided with a second outwardly turned edge, the inner diameter of one end of the metal branch pipe matches the outer diameter of the first outwardly turned edge, and the lower end surface of the second outwardly turned edge is attached to the outer wall of the metal main pipe and connected by welding.

10. A tee junction according to claim 9, characterised in that: The outer shape of the second outwardly turned edge is a saddle shape which can be attached to the outer wall of the metal main pipe.

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