Heat exchange tube welding structure and heat exchanger device

Abstract

The utility model provides a heat exchange tube welding structure and a heat exchanger device. The heat exchange tube welding structure comprises a first heat exchange tube body, a second heat exchange tube body and a connecting base tube body, a first welding cavity is formed in the first heat exchange pipe body; a second welding cavity is formed in the second heat exchange pipe body; the connecting base tube body comprises a first welding part, a bending part and a second welding part which are connected in sequence, the first welding part penetrates through the first welding cavity and is welded to the first heat exchange tube body, the first welding part and the first heat exchange tube body are welded to form a first welding seam wrapping part, and the first welding seam wrapping part is used for being filled between the first welding part and the first heat exchange tube body; the second welding part penetrates through the second welding cavity and is welded to the second heat exchange pipe body, the second welding part and the second heat exchange pipe body are welded to form a second welding seam wrapping part, and the second welding seam wrapping part is used for being filled between the second welding part and the second heat exchange pipe body. The heat exchange tube welding structure is good in overall air tightness.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of heat exchanger devices, and particularly relates to a heat exchange tube welding structure and a heat exchanger device. BACKGROUND

[0002] A heat exchanger device is a heat exchange device that achieves heat balance between fluids of different temperatures through heat transfer. The heat exchanger device is widely used in fields such as coating machines, heating systems, engine cooling systems, air conditioning systems, refrigeration systems, and power systems. The heat exchanger device is composed of a device frame and a heat exchange tube welding structure, and the heat exchange tube welding structure is connected to the device frame.

[0003] The heat exchange tube welding structure of the related art includes a tube sheet and a heat exchange tube. The method of simultaneously expanding and resistance welding is adopted. At the same time of tube expansion, at least one annular expansion contact point between the tube sheet and the heat exchange tube is heated by electricity to form a welding point under the tube expansion pressure. The outer wall of the heat exchange tube and the hole wall of the tube sheet are insulated from each other except the annular expansion contact point. For example, a Chinese patent with the patent number CN201811320556.3.

[0004] However, since at least one annular expansion contact point between the tube sheet and the heat exchange tube is heated by electricity to form a welding point under the tube expansion pressure, the outer wall of the heat exchange tube and the hole wall of the tube sheet are insulated from each other except the annular expansion contact point. That is, there is a part between the outer wall of the heat exchange tube and the hole wall of the tube sheet that cannot conduct electricity. As a result, there is an un-welded part between the outer wall of the heat exchange tube and the hole wall of the tube sheet. The gap of the un-welded part is difficult to be filled by the tube expansion pressure, so that the air tightness of the un-welded part is poor, thereby making the overall air tightness of the heat exchange tube welding structure poor. UTILITY MODEL CONTENT

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a heat exchange tube welding structure and a heat exchanger device with good overall air tightness.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] A heat exchange tube welding structure for connecting with a device frame, comprising:

[0008] A first heat exchange tube body for connecting with the device frame, the first heat exchange tube body being provided with a first welding cavity;

[0009] A second heat exchange tube body for connecting with the device frame, the second heat exchange tube body being provided with a second welding cavity;

[0010] The connecting pipe body comprises a first welding part, a bending part and a second welding part connected in sequence, the first welding part is arranged in the first welding cavity and welded with the first heat exchange pipe body, the first welding part is welded with the first heat exchange pipe body to form a first welding seam covering part for filling the space between the first welding part and the first heat exchange pipe body, and the second welding part is arranged in the second welding cavity and welded with the second heat exchange pipe body, the second welding part is welded with the second heat exchange pipe body to form a second welding seam covering part for filling the space between the second welding part and the second heat exchange pipe body.

[0011] In one of the embodiments, the first welding seam covering part is provided with a first undercut part, the undercut depth of the first undercut part is X1, and 0 < X1 ≤ 0.5 mm.

[0012] In one of the embodiments, the undercut depth of the first undercut part is smaller than the welding seam length of the first welding seam covering part, the welding seam length of the first welding seam covering part is Y1, and 0.5 < Y1 ≤ 0.8 mm.

[0013] In one of the embodiments, the first welding part, the bending part and the second welding part are integrally formed.

[0014] In one of the embodiments, the second welding seam covering part is provided with a second undercut part, the undercut depth of the second undercut part is X2, and 0 < X2 ≤ 0.5 mm.

[0015] In one of the embodiments, the undercut depth of the second undercut part is smaller than the welding seam length of the second welding seam covering part, the welding seam length of the second welding seam covering part is Y2, and 0.5 < Y2 ≤ 0.8 mm.

[0016] In one of the embodiments, the bending part is in the shape of U.

[0017] In one of the embodiments, the first heat exchange pipe body is used for welding with the device rack.

[0018] In one of the embodiments, the second heat exchange pipe body is used for welding with the device rack.

[0019] A heat exchanger device comprises a device rack and the heat exchange pipe welding structure according to any one of the embodiments, and the heat exchange pipe welding structure is connected with the device rack.

[0020] Compared with the prior art, the present disclosure has at least the following advantages:

[0021] The first weld part is welded with the first heat exchange pipe body to form a first weld seam covering part, the first weld seam covering part is used to fill the space between the first weld part and the first heat exchange pipe body, so that the first weld seam covering part fills the space between the first weld part and the first heat exchange pipe body, that is, the outer wall of the first weld part and the inner wall of the first heat exchange pipe body are completely welded, so that the air tightness between the first weld part and the first heat exchange pipe body is better, thereby the air tightness between the connecting base pipe body and the first heat exchange pipe body is better; the second weld part is welded with the second heat exchange pipe body to form a second weld seam covering part, the second weld seam covering part is used to fill the space between the second weld part and the second heat exchange pipe body, so that the second weld seam covering part fills the space between the second weld part and the second heat exchange pipe body, that is, the outer wall of the second weld part and the inner wall of the second heat exchange pipe body are completely welded, so that the air tightness between the second weld part and the second heat exchange pipe body is better, thereby the air tightness between the connecting base pipe body and the second heat exchange pipe body is better, and the problem of the existing technology that there is an unwelded part between the outer wall of the heat exchange pipe and the hole wall of the tube plate is avoided, the first weld seam covering part is used to compensate the space between the connecting base pipe body and the first heat exchange pipe body, and the second weld seam covering part is used to compensate the space between the connecting base pipe body and the second heat exchange pipe body, so that the overall air tightness of the heat exchange pipe welding structure is better. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be considered as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0023] Figure 1 It is a structural schematic diagram of a heat exchanger device of an embodiment;

[0024] Figure 2 It is a structural schematic diagram of a heat exchanger device of an embodiment; Figure 1 It is an enlarged schematic diagram of A of the heat exchanger device shown in the figure;

[0025] Figure 3 It is a structural schematic diagram of a heat exchanger device of an embodiment; Figure 1 It is a partial structural schematic diagram of a heat exchange pipe welding structure of the heat exchanger device shown in the figure;

[0026] Figure 4 It is a partial structural schematic diagram of a heat exchange pipe welding structure of the heat exchanger device shown in the figure; Figure 3 It is an enlarged schematic diagram of B of the heat exchange pipe welding structure shown in the figure;

[0027] Figure 5 It is a partial structural schematic diagram of a heat exchange pipe welding structure of the heat exchanger device shown in the figure; Figure 1 It is a partial structural schematic diagram of a heat exchange pipe welding structure of the heat exchanger device shown in the figure;

[0028] Figure 6 It is a partial structural schematic diagram of a heat exchange pipe welding structure of the heat exchanger device shown in the figure; Figure 5An enlarged view of the heat exchange tube welding structure at C. DETAILED DESCRIPTION

[0029] For the purpose of promoting an understanding of the disclosure, the disclosure will now be described in greater detail with reference to the relevant drawings. The preferred embodiments of the disclosure are shown in the drawings. However, the disclosure can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the disclosure to those skilled in the art.

[0030] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustrative purposes only and are not intended to be limiting.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0032] As shown in FIG. 1, a heat exchange tube welding structure 10a of an embodiment is used to connect with a device rack 20a. Figures 1 to 6

[0033] Further, the heat exchange tube welding structure 10a includes a first heat exchange tube body 100, a second heat exchange tube body 200, and a connecting base tube body 300; the first heat exchange tube body 100 is used to connect with the device rack 20a, and the first heat exchange tube body 100 is provided with a first welding cavity 110; the second heat exchange tube body 200 is used to connect with the device rack 20a, and the second heat exchange tube body 200 is provided with a second welding cavity 210; the connecting base tube body 300 includes a first welding portion 310, a bending portion 320, and a second welding portion 330 connected in sequence, the first welding portion 310 is arranged in the first welding cavity 110 and welded with the first heat exchange tube body 100, and the first welding portion 310 is welded with the first heat exchange tube body 100 to form a first welding seam covering portion 311, which is used to fill the space between the first welding portion 310 and the first heat exchange tube body 100; the second welding portion 330 is arranged in the second welding cavity 210 and welded with the second heat exchange tube body 200, and the second welding portion 330 is welded with the second heat exchange tube body 200 to form a second welding seam covering portion 331, which is used to fill the space between the second welding portion 330 and the second heat exchange tube body 200.​

[0034] In this embodiment, the first heat exchange tube 100 and the second heat exchange tube 200 are symmetrically distributed about the central axis of the connecting base tube 300. A first weld portion 310 is welded to the first heat exchange tube 100 to form a first weld covering portion 311, which fills the gap between the first weld portion 310 and the first heat exchange tube 100. A second weld portion 330 is welded to the second heat exchange tube 200 to form a second weld covering portion 331, which fills the gap between the second weld portion 330 and the second heat exchange tube 200.

[0035] In the aforementioned heat exchanger tube welding structure 10a, the first welding part 310 is welded to the first heat exchanger tube body 100 to form a first weld covering part 311. The first weld covering part 311 fills the gap between the first welding part 310 and the first heat exchanger tube body 100, ensuring that the outer wall of the first welding part 310 is completely welded to the inner wall of the first heat exchanger tube body 100. This results in good airtightness between the first welding part 310 and the first heat exchanger tube body 100, thereby improving the airtightness between the connecting base tube body 300 and the first heat exchanger tube body 100. The second welding part 330 is welded to the second heat exchanger tube body 200 to form a second weld covering part 331. The second weld covering part 331 fills the gap between the second welding part 330 and the first heat exchanger tube body 100. Between the second heat exchange tube body 200, the second weld covering part 331 fills the gap between the second weld part 330 and the second heat exchange tube body 200, that is, the outer wall of the second weld part 330 is completely welded to the inner wall of the second heat exchange tube body 200, so that the air tightness between the second weld part 330 and the second heat exchange tube body 200 is better, thereby making the air tightness between the connecting base tube body 300 and the second heat exchange tube body 200 better, thus avoiding the problem of unwelded parts between the outer wall of the heat exchange tube and the tube sheet hole wall in the prior art. The first weld covering part 311 is used to fill the gap between the connecting base tube body 300 and the first heat exchange tube body 100, and the second weld covering part 331 is used to fill the gap between the connecting base tube body 300 and the second heat exchange tube body 200, thereby making the overall air tightness of the heat exchange tube weld structure 10a better.

[0036] like Figures 3 to 4 As shown, in one embodiment, the first weld covering portion 311 is provided with a first undercut portion 3111, and the undercut depth of the first undercut portion 3111 is X1, where 0 < X1 ≤ 0.5 mm.

[0037] likeFigures 3 to 4 As shown in the drawings, in one embodiment, the first beading depth of the first beading portion 3111 is less than the weld length of the first weld cladding portion 311, the weld length of the first weld cladding portion 311 is Y1, and 0.5 < Y1 ≤ 0.8 mm.

[0038] In one embodiment, the first welding portion 310, the bending portion 320, and the second welding portion 330 are integrally formed, so that the connection strength between the first welding portion 310, the bending portion 320, and the second welding portion 330 is high, and the structural stability of the connection base pipe body 300 is good.

[0039] As shown in the drawings, Figures 5 to 6 In one embodiment, the second beading depth of the second beading portion 3311 is X2, and 0 < X2 ≤ 0.5 mm.

[0040] As shown in the drawings, Figures 5 to 6 In one embodiment, the second beading depth of the second beading portion 3311 is less than the weld length of the second weld cladding portion 331, the weld length of the second weld cladding portion 331 is Y2, and 0.5 < Y2 ≤ 0.8 mm.

[0041] As shown in the drawings, Figures 1 to 2 In one embodiment, the bending portion 320 is in the shape of a U.

[0042] As shown in the drawings, Figures 1 to 2 In one embodiment, the first heat exchange pipe body 100 is used for welding with the device rack 20a, so that the connection stability between the first heat exchange pipe body 100 and the device rack 20a is good.

[0043] As shown in the drawings, Figures 1 to 2 In one embodiment, the second heat exchange pipe body 200 is used for welding with the device rack 20a, so that the connection stability between the second heat exchange pipe body 200 and the device rack 20a is good.

[0044] The present disclosure also provides a heat exchanger device 10, which comprises a device rack 20a and a heat exchange pipe welding structure 10a of any one of the above embodiments, and the heat exchange pipe welding structure 10a is connected with the device rack 20a.

[0045] Compared with the prior art, the present disclosure has at least the following advantages:

[0046] The first welding part 310 is welded with the first heat exchange pipe body 100 to form a first welding seam covering part 311, which is used to fill the space between the first welding part 310 and the first heat exchange pipe body 100, so that the first welding seam covering part 311 fills the gap between the first welding part 310 and the first heat exchange pipe body 100, that is, the outer wall of the first welding part 310 and the inner wall of the first heat exchange pipe body 100 are completely welded, so that the air tightness between the first welding part 310 and the first heat exchange pipe body 100 is better, thereby the air tightness between the connecting base pipe body 300 and the first heat exchange pipe body 100 is better; the second welding part 330 is welded with the second heat exchange pipe body 200 to form a second welding seam covering part 331, which is used to fill the space between the second welding part 330 and the second heat exchange pipe body 200, so that the second welding seam covering part 331 fills the gap between the second welding part 330 and the second heat exchange pipe body 200, that is, the outer wall of the second welding part 330 and the inner wall of the second heat exchange pipe body 200 are completely welded, so that the air tightness between the second welding part 330 and the second heat exchange pipe body 200 is better, thereby the air tightness between the connecting base pipe body 300 and the second heat exchange pipe body 200 is better, and the problem of the existing technology that there is an unwelded part between the outer wall of the heat exchange pipe and the hole wall of the tube sheet is avoided. The first welding seam covering part 311 is used to compensate for the gap between the connecting base pipe body 300 and the first heat exchange pipe body 100, and the second welding seam covering part 331 is used to compensate for the gap between the connecting base pipe body 300 and the second heat exchange pipe body 200, so that the overall air tightness of the heat exchange pipe welding structure 10a is better.

[0047] The above-described embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, which are within the scope of protection of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.

Claims

1. A heat exchanging tube welding structure for connection with a device rack, characterized by, The application relates to a heat exchange pipe welding structure. The first heat exchange pipe body is used for being welded with the device rack. The second heat exchange pipe body is used for being welded with the device rack. The first welding part is arranged in the first welding cavity and welded with the first heat exchange pipe body, the first welding part is welded with the first heat exchange pipe body to form a first welding seam covering part, and the first welding seam covering part is used for filling the first welding part and the first heat exchange pipe body.

2. The heat exchange tube welding structure according to claim 1, wherein The first welding seam covering part is provided with a first undercut part, the undercut depth of the first undercut part is X1, and 0X1<=0.5mm.

3. The heat exchange tube welding structure according to claim 2, characterized by The undercut depth of the first undercut part is smaller than the welding seam length of the first welding seam covering part, the welding seam length of the first welding seam covering part is Y1, and 0.5Y1<=0.8mm.

4. The heat exchanger tube welding structure according to claim 1, wherein The first welding part, the bending part and the second welding part are integrally formed.

5. The heat exchanger tube weld structure of claim 1, wherein The second welding seam covering part is provided with a second undercut part, the undercut depth of the second undercut part is X2, and 0X2<=0.5mm.

6. The heat exchange tube welding structure according to claim 5, wherein The undercut depth of the second undercut part is smaller than the welding seam length of the second welding seam covering part, the welding seam length of the second welding seam covering part is Y2, and 0.5Y2<=0.8mm.

7. The heat exchanger tube weld structure of claim 1, wherein The bending part is in a U shape.

8. The heat exchanger tube weld structure of claim 1, wherein The first heat exchange pipe body is used for being welded with the device rack.

9. The heat exchange tube welding structure according to claim 1, wherein The second heat exchange pipe body is used for being welded with the device rack.

10. A heat exchanger device, characterized by The application relates to a device rack and a heat exchange pipe welding structure.

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