A welded structure of an air conditioning duct

Abstract

The utility model belongs to air conditioning technical field, concretely relates to a kind of welding structure of air conditioning pipeline, including first pipeline and the second pipeline of first pipeline welding connection, the first pipeline is connected with the sleeve joint of second pipeline, limiting portion that the insertion depth of second pipeline or first pipeline is set on first pipeline or second pipeline, after the sleeve joint connection of first pipeline and second pipeline, the overlapping portion of sleeve joint is welded a circle using argon arc welding, and the welding connection of first pipeline and second pipeline is realized, advantage is: simple structure, the consistency of welding is good, structural strength is big, applicable to the welding connection structure of air conditioning guide pipe.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning technology, and in particular relates to a welded structure for air conditioning pipes. Background Technology

[0002] The most common method for welding traditional metal pipes is argon arc welding, which typically involves butt welding, such as... Figure 1 Typically, the two pipes 01 and 02 are first fixed with fixtures, then fixed by spot welding 03, and finally welded around the perimeter using an argon arc welding head. This welding technique has certain limitations: First, it is difficult to operate: before spot welding, the ends of the two pipes 01 and 02 need to be aligned. If the two pipes are relatively long or heavy, it is difficult to align the ends even with fixtures. Moreover, the welding has high requirements for the end faces of the two pipes, which must be free of burrs, and the end faces must be flat and free of defects. Second, the welding scene is limited: after the spot welding 03, argon arc welding is required. Before welding, the tungsten needle 04 of the argon arc welding head must be aligned with the weld seam, and the base material is melted by electric discharge for welding. The alignment of the tungsten needle requires constant adjustment and requires a spacious and well-lit space. However, some scenes are not suitable for operation: when there are obstacles such as walls and pipes around, or when the lighting is dim, the welding quality cannot be guaranteed. Summary of the Invention

[0003] The purpose of this invention is to provide a welding structure for air conditioning pipes that is simple to operate, not limited by the scene, and has accurate welding position.

[0004] The purpose of this utility model is to solve the following problem:

[0005] A welding structure for an air conditioning pipe includes a first pipe and a second pipe welded to the first pipe. The first pipe and the second pipe are sleeved together. A limiting part is provided on the first pipe or the second pipe to limit the insertion depth of the second pipe or the first pipe. After the first pipe and the second pipe are sleeved together, the overlapping part of the sleeved part is welded with argon arc welding to achieve the welding connection between the first pipe and the second pipe.

[0006] As a further optimization of the above technical solution, one end of the first pipe is provided with a straight pipe expansion section that extends after passing through the diameter reduction section. The expansion size of the straight pipe expansion section is such that the second pipe can be inserted just right. The overlapping part after the second pipe is inserted into the first pipe is welded around by argon arc welding to achieve the welding connection between the first pipe and the second pipe.

[0007] As a further optimization of the above technical solution, one end of the first pipe is provided with a straight pipe diameter reduction section formed by extending after the diameter reduction section. The diameter reduction of the straight pipe diameter reduction section is such that the first pipe is just inserted into the second pipe. The overlapping part after the first pipe is inserted into the second pipe is welded around by argon arc welding to achieve the welding connection between the first pipe and the second pipe.

[0008] As a further optimization of the above technical solution, a positioning ring is provided circumferentially on the outer wall of the first pipe or positioning protrusions are provided at intervals circumferentially. The distance between the outer side of the positioning ring or positioning protrusion and one end face of the first pipe is the sleeve length of the first pipe and the second pipe. After the first pipe is inserted into the second pipe and is limited by the positioning ring or positioning protrusion, the overlapping part of the sleeve is welded with argon arc welding to achieve the welding connection between the first pipe and the second pipe.

[0009] As a further optimization of the above technical solution, a positioning ring is provided circumferentially on the inner wall of the first pipe or positioning protrusions are provided at intervals circumferentially. The distance between the outer side of the positioning ring or positioning protrusion and one end face of the first pipe is the sleeve length of the first pipe and the second pipe. After the second pipe is inserted into the first pipe and is limited by the positioning ring or positioning protrusion, the overlapping part of the sleeve is welded with argon arc welding to achieve the welding connection between the first pipe and the second pipe.

[0010] As a further optimization of the above technical solution, both the first pipe and the second pipe are made of stainless steel.

[0011] As a further optimization of the above technical solution, after the first pipe and the second pipe are sleeved together, the outer surface of the overlapping part of the sleeved part is first reduced using a reducing tool to make the fitting gap of the overlapping part of the first pipe and the second pipe approach zero. Then, the overlapping part of the sleeved part is welded with argon arc welding to achieve the welding connection between the first pipe and the second pipe.

[0012] The advantages of this invention compared to the prior art are:

[0013] 1. In this utility model, the first pipe and the second pipe are connected by a sleeve. Because the overlapping part of the sleeve connection is relatively wide, precise alignment is not required for welding. Therefore, even without a welding certificate, a firm and reliable welding operation can be achieved, which lowers the welding threshold, ensures good welding consistency, avoids overheating, and reduces the risk of leakage.

[0014] 2. Due to the good welding consistency, high welding efficiency, low production cost, and high structural strength of this utility model.

[0015] 3. This utility model has a simple structure, good welding consistency, and high structural strength, and is suitable for welding connection structures of air conditioning ducts. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the prior art.

[0017] Figure 2 This is a cross-sectional view of the first pipe of this utility model, which has a straight pipe expansion section at one end.

[0018] Figure 3 This is a cross-sectional view of the first pipe of this utility model, which has a straight pipe diameter reduction section at one end.

[0019] Figure 4 This is a cross-sectional view of the outer surface of the first pipe of this utility model having a positioning ring or positioning protrusion.

[0020] Figure 5 This is a cross-sectional view of the inner surface of the first pipe of this utility model having a positioning ring or positioning protrusion. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 2-5 :

[0022] A welding structure for an air conditioning pipe includes a first pipe 10 and a second pipe 20 welded to the first pipe 10. The first pipe 10 and the second pipe 20 are sleeved together. The first pipe 10 or the second pipe 20 is provided with a limiting part that restricts the insertion depth of the second pipe 20 or the first pipe 10. After the first pipe 10 and the second pipe 20 are sleeved together, the overlapping part L1 of the sleeved connection is welded around by the welding head 30 of an argon arc welding machine to achieve the welding connection between the first pipe 10 and the second pipe 20.

[0023] See Figure 2 As a further optimization of the above technical solution, one end 13 of the first pipe 10 is provided with a straight pipe expansion section 12 that extends after passing through the diameter reducing section 11. The diameter of the straight pipe expansion section 12 is such that the second pipe 20 can be inserted just right. The overlapping part L1 after the second pipe 20 is inserted into the first pipe 10 and limited by the diameter reducing section 11 is welded around by the welding head 30 of the argon arc welding machine to achieve the welding connection between the first pipe 10 and the second pipe 20.

[0024] See Figure 3 As a further optimization of the above technical solution, one end 13 of the first pipe 10 is provided with a straight pipe diameter reduction section 15 that extends after passing through the diameter reduction section 14. The diameter reduction of the straight pipe diameter reduction section 15 is such that the first pipe 10 is just inserted into the second pipe 20. The overlapping part L2 after the first pipe 10 is inserted into the second pipe 20 and is limited by the diameter reduction section 14 is welded around by the welding head 30 of the argon arc welding machine to achieve the welding connection between the first pipe 10 and the second pipe 20.

[0025] See Figure 4 As a further optimization of the above technical solution, a positioning ring 16 or positioning protrusions are provided circumferentially on the outer wall of the first pipe 10. The distance between the outer side of the positioning ring 16 or the positioning protrusion and one end face of the first pipe 10 is the sleeve length of the first pipe 10 and the second pipe 20 (i.e., the overlapping part L3). After the first pipe 10 is inserted into the second pipe 20 and one end face 21 of the second pipe 20 is limited by the positioning ring 16 or the positioning protrusions, the overlapping part L3 of the sleeve of the second pipe 20 is welded with the welding head 30 of the argon arc welding machine to achieve the welding connection between the first pipe 10 and the second pipe 20.

[0026] See Figure 5 As a further optimization of the above technical solution, a positioning ring 17 or positioning protrusions are provided circumferentially on the inner wall of the first pipe 10. The distance between the outer side of the positioning ring 17 or the positioning protrusion and one end face 13 of the first pipe 10 is the sleeve length (i.e., the overlapping part L4) of the first pipe 10 and the second pipe 20. After the second pipe 20 is inserted into the first pipe 10 and limited by the positioning ring 17 or the positioning protrusions, the overlapping part L4 is welded with the welding head 30 of the argon arc welding machine to achieve the welding connection between the first pipe 10 and the second pipe 20.

[0027] As a further optimization of the above technical solution, both the first pipe 10 and the second pipe 20 are made of stainless steel.

[0028] As a further optimization of the above technical solution, after the first pipe 10 and the second pipe 20 are sleeved, the outer surface of the overlapping part of the sleeved part is first reduced using a reducing tool to make the fitting gap of the overlapping part of the first pipe 10 and the second pipe 20 approach zero. Then, the overlapping part of the sleeved part is welded with the welding head 30 of the argon arc welding machine to achieve the welding connection of the first pipe 10 and the second pipe 20.

[0029] 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 welded structure for an air conditioning duct, comprising a first duct and a second duct welded to the first duct, characterized in that: The first pipe and the second pipe are connected by a sleeve. The first pipe or the second pipe is provided with a limiting part to restrict the insertion depth of the second pipe or the first pipe. After the first pipe and the second pipe are connected by a sleeve, the overlapping part of the sleeve is welded with argon arc welding to achieve the welding connection between the first pipe and the second pipe.

2. The welded structure of an air conditioning pipe according to claim 1, characterized in that: One end of the first pipe is provided with a straight pipe expansion section that extends after passing through the diameter reduction section. The expansion size of the straight pipe expansion section is such that the second pipe can be inserted just right. The overlapping part after the second pipe is inserted into the first pipe is welded around by argon arc welding to achieve the welding connection between the first pipe and the second pipe.

3. The welded structure of an air conditioning pipe according to claim 1, characterized in that: One end of the first pipe is provided with a straight pipe diameter reduction section that extends after passing through the diameter reduction section. The diameter reduction of the straight pipe diameter reduction section is such that the first pipe is just inserted into the second pipe. The overlapping part after the first pipe is inserted into the second pipe is welded around by argon arc welding to achieve the welded connection between the first pipe and the second pipe.

4. The welded structure of an air conditioning pipe according to claim 1, characterized in that: The outer wall of the first pipe is provided with a circumferential positioning ring or circumferentially spaced positioning protrusions. The distance between the outer side of the positioning ring or positioning protrusion and one end face of the first pipe is the sleeve length of the first pipe and the second pipe. After the first pipe is inserted into the second pipe and is limited by the positioning ring or positioning protrusion, the overlapping part of the sleeve is welded with argon arc welding to achieve the welded connection between the first pipe and the second pipe.

5. The welded structure of an air conditioning pipe according to claim 1, characterized in that: The inner wall of the first pipe is provided with a circumferential positioning ring or circumferentially spaced positioning protrusions. The distance between the outer side of the positioning ring or positioning protrusion and one end face of the first pipe is the sleeve length of the first pipe and the second pipe. After the second pipe is inserted into the first pipe and is limited by the positioning ring or positioning protrusion, the overlapping part of the sleeve is welded with argon arc welding to achieve the welding connection between the first pipe and the second pipe.

6. The welded structure of an air conditioning pipe according to claim 1, characterized in that: Both the first and second pipes are made of stainless steel.

7. A welded structure for an air conditioning pipe according to any one of claims 1-6, characterized in that: After the first pipe and the second pipe are fitted together, the outer surface of the overlapping part of the fitting is first reduced using a reducing tool to make the fitting gap of the overlapping part of the first pipe and the second pipe approach zero. Then, the overlapping part of the fitting is welded with argon arc welding to achieve the welding connection between the first pipe and the second pipe.

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