Air conditioning pipe fitting

Abstract

The present invention discloses an air conditioning pipe fitting, including a stainless steel main pipe and a copper nipple. The stainless steel main pipe is provided with a through hole corresponding to the copper nipple. One end of the copper nipple is inserted and welded in the through hole, and a copper branch pipe is inserted and welded on the other end of the copper nipple. The copper nipple is provided with an abutment platform for abutting the copper branch pipe. The copper nipple is inserted into the stainless steel main pipe, and the stainless steel main pipe and the copper nipple are first placed in a welding furnace for brazing to fix the copper nipple on the stainless steel main pipe, and then the copper branch pipe is inserted into the corresponding copper nipple. Since the copper branch pipe and the copper nipple are both made of copper, the copper branch pipe can be fixed to the copper nipple by soldering at a relatively low welding temperature, and the structural strength of the copper branch pipe will not be reduced due to excessively high welding temperature, thereby ensuring the service life and reliability of the product.

Description

Technical Field

[0001] The invention relates to the technical field of air-conditioning accessories, and in particular to an air-conditioning pipe fitting. Background Art

[0002] In existing air-conditioning pipelines, due to the high price of copper materials, it has gradually become a trend to use stainless steel pipelines to replace copper pipelines, but the branch pipes of the pipelines generally still need to be connected using copper pipes.

[0003] That is, first make a hole in the stainless steel main pipe, then plug in the copper branch pipe to be connected, and then put the stainless steel main pipe and the copper branch pipe into a welding furnace to braze them together. However, due to the influence of the stainless steel and copper materials themselves, the welding temperature must be maintained above 1000 degrees Celsius to weld the stainless steel and copper together. The copper branch pipe welded at high temperature is likely to cause the overall grain size of the copper branch pipe to become larger, which seriously affects the structural strength and deformation resistance of the copper branch pipe. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide an air conditioning pipe fitting.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] An air conditioning pipe fitting comprises a stainless steel main pipe and a copper nipple, wherein the stainless steel main pipe is provided with through holes corresponding to the copper nipple one by one, one end of the copper nipple is inserted and welded in the through hole, a copper branch pipe is inserted and welded on the other end of the copper nipple, and an abutment platform for abutting the copper branch pipe is provided in the copper nipple.

[0007] Preferably, a welding plane corresponding to the position of the copper socket is provided on the stainless steel main pipe, and the copper socket is provided with a convex ring extending outward and abutting against the welding plane.

[0008] Preferably, the lower end surface of the convex ring is provided with a convex ridge one abutting against the welding plane, and a gap one is formed between the convex ridges one.

[0009] Preferably, the convex ridges are distributed radially outwards with the copper socket as the center.

[0010] Preferably, the copper socket is provided with a plug-in end plugged into the through hole, and the outer periphery of the plug-in end is provided with two convex ridges abutting against the side wall of the through hole, and a second gap is formed between the two convex ridges.

[0011] Preferably, the convex ridges are distributed circumferentially on the outer periphery of the plug-in end and are distributed up and down.

[0012] The beneficial effects of the present invention are:

[0013] 1. By inserting the copper socket on the stainless steel main pipe, first put the stainless steel main pipe and the copper socket into the welding furnace for brazing, so that the copper socket is fixed on the stainless steel main pipe, and then insert the copper branch pipe into the corresponding copper socket. Since the copper branch pipe and the copper socket are made of copper, the copper branch pipe can be fixed on the copper socket by soldering at a lower welding temperature, and the structural strength of the copper branch pipe will not be reduced due to excessively high welding temperature, thereby ensuring the service life and reliability of the product;

[0014] 2. The copper socket is provided with convex ribs 1 and convex ribs 2, and gaps 1 and 2 are respectively formed through the convex ribs 1 and convex ribs 2 for the brazing material to penetrate and be adsorbed. That is, through the setting of gaps 1 and 2, it is ensured that the brazing material between the copper socket and the stainless steel main pipe will not leak, so that the brazing material can better contact and weld the copper socket and the stainless steel main pipe, so as to ensure the firmness of the copper socket welded to the stainless steel main pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is an explosion schematic diagram of the present invention;

[0017] Figure 3 It is a cross-sectional schematic diagram of the present invention;

[0018] Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0019] Figure 5 It is a schematic structural diagram of the copper connector of the present invention.

[0020] In the figure: a stainless steel main pipe 1, a through hole 11, a welding plane 12, a copper socket 2, a convex ring 21, a convex rib 1 211, a gap 1 212, a plug-in end 22, a convex rib 221, a gap 222, a butt platform 23, and a copper branch pipe 3. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0022] In the description of this specification, the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0023] like Figure 1 to Figure 5As shown, an air conditioning pipe fitting comprises a stainless steel main pipe 1 and a copper nipple 2. The stainless steel main pipe 1 is provided with through holes 11 corresponding to the copper nipple 2 one by one. The through holes 11 are distributed on the side wall of the stainless steel main pipe 1 and are arranged through. One end of the copper nipple 2 is inserted and welded in the through hole 11. The stainless steel main pipe 1 and the copper nipple 2 are placed in a welding furnace for brazing, so that the copper nipple 2 is fixed on the stainless steel main pipe 1 through the brazing material.

[0024] In order to improve the firmness of welding between the copper nipple 2 and the stainless steel main pipe 1, a welding plane 12 corresponding to the position of the copper nipple 2 is provided on the stainless steel main pipe 1. The corresponding positions of the stainless steel main pipe 1 and the copper nipple 2 are flattened into a plane to form the welding plane 12. The copper nipple 2 is provided with a convex ring 21 extending outward and abutting against the welding plane 12. The welding plane 12 and the lower end surface of the convex ring 21 are fitted with each other, that is, the setting of the welding plane 12 can better fit with the copper nipple 2, so that the brazing material can better penetrate and weld the copper nipple 2 and the stainless steel main pipe 1.

[0025] Furthermore, the lower end surface of the convex ring 21 is provided with a convex rib 211 abutting against the welding plane 12, and the convex rib 211 is radially distributed outward with the copper joint sleeve 2 as the center, and the end surface of the convex rib 211 is fitted with the lower end surface of the convex ring 21, and a gap 212 is formed between the convex ribs 211. Through the setting of the gap 212, the brazing material can better penetrate from the outside to the inside through the gap 212 between the convex ring 21 and the welding plane 12 of the stainless steel main pipe 1.

[0026] The copper socket 2 is provided with a plug-in end 22 plugged into the through hole 11, and the outer periphery of the plug-in end 22 is provided with a convex rib 221 abutting against the side wall of the through hole 11, and the end surface of the convex rib 221 is attached to the side wall of the through hole 11, and the convex ribs 221 are circumferentially distributed on the outer periphery of the plug-in end 22 and distributed up and down, and a gap 222 is formed between the connected convex ribs 221. Through the setting of the gap 222, the brazing material can better penetrate from bottom to top through the gap 222 between the plug-in end 22 and the stainless steel main pipe 1.

[0027] Furthermore, by setting the first gap 212 and the second gap 222, the brazing material can quickly penetrate into between the copper nipple 2 and the stainless steel main pipe 1, and be adsorbed in the first gap 212 and the second gap 222, and is not easy to leak outward, so that the brazing material can better contact and weld the copper nipple 2 and the stainless steel main pipe 1, so as to avoid the brazing material leaking from between the copper nipple 2 and the stainless steel main pipe 1 and affecting the firmness of the welding, thereby ensuring the firmness of the copper nipple 2 welded to the stainless steel main pipe 1, that is, improving the overall structural strength of the product.

[0028] A copper branch pipe 3 is inserted and welded on the other end of the copper joint sleeve 2. Specifically, a buttress 23 for butting the copper branch pipe 3 is provided in the copper joint sleeve 2. One end of the copper branch pipe 3 is inserted into the copper joint sleeve 2 and butts on the buttress 23. The buttress 23 is used to position the copper branch pipe 3.

[0029] Since the copper branch pipe 3 and the copper nipple 2 are both made of copper, the copper branch pipe 3 can be fixed to the copper nipple 2 by soldering at a relatively low welding temperature (generally, a flame welding gun at 700 to 900 degrees Celsius is used to fix the copper nipple 2 and the copper branch pipe 3 together by soldering). Since the welding temperature between copper and copper is relatively low, the structural strength of the copper branch pipe 3 will not be reduced due to excessively high welding temperature, so that the copper branch pipe 3 of this embodiment has good structural strength and deformation resistance, thereby ensuring the service life and reliability of the product.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioning pipe fitting, characterized in that: The invention comprises a stainless steel main pipe (1) and a copper nipple (2); the stainless steel main pipe (1) is provided with a through hole (11) corresponding to the copper nipple (2); one end of the copper nipple (2) is inserted and welded in the through hole (11); a copper branch pipe (3) is inserted and welded on the other end of the copper nipple (2); and a buttress (23) is provided in the copper nipple (2) for butting against the copper branch pipe (3).

2. An air conditioning pipe fitting according to claim 1, characterized in that: The stainless steel main pipe (1) is provided with a welding plane (12) corresponding to the position of the copper socket (2), and the copper socket (2) is provided with a convex ring (21) extending outwards and abutting against the welding plane (12).

3. An air conditioning pipe fitting according to claim 2, characterized in that: The lower end surface of the convex ring (21) is provided with a convex ridge (211) that abuts against the welding plane (12), and a gap (212) is formed between the convex ridges (211).

4. An air conditioning pipe fitting according to claim 3, characterized in that: The convex ridges (211) are distributed radially outwards with the copper socket (2) as the center.

5. An air conditioning pipe fitting according to claim 1, characterized in that: The copper socket (2) is provided with a plug-in end (22) plugged into the through hole (11), and the outer periphery of the plug-in end (22) is provided with two convex ridges (221) abutting against the side wall of the through hole (11), and a second gap (222) is formed between the two convex ridges (221).

6. An air conditioning pipe fitting according to claim 5, characterized in that: The second convex ridges (221) are distributed circumferentially on the outer periphery of the plug-in end (22) and are distributed up and down.

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