Heat exchange tube welding process

Abstract

The application discloses a heat exchange pipe welding process, and the heat exchange pipe has a head end and a tail end, and the heat exchange pipe is spirally formed with a plurality of spiral sections which are sequentially connected, the heat exchange pipe welding process uses a heat exchange pipe welding tool and a support strip, the heat exchange pipe welding tool comprises a first positioning sleeve, a second positioning sleeve located below the first positioning sleeve, a first driving member and a first support plate in driving connection with the first driving member, the first support plate is provided with a first sawtooth part, and the heat exchange pipe welding process comprises the following steps: inserting the head end into the first positioning sleeve; inserting the tail end into the second positioning sleeve; driving the first support plate to move by using the first driving member, and making the first sawtooth part fit the plurality of spiral sections; and welding the support strip to the peripheral wall of the heat exchange pipe along the axial direction of the heat exchange pipe, according to the heat exchange pipe welding process, the head end and the tail end of the heat exchange pipe can be kept at a preset distance when the support strip is welded to the heat exchange pipe, and the spiral intervals between the plurality of spiral sections of the heat exchange pipe are also kept at a preset distance.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a welding process for heat exchanger tubes. Background Technology

[0002] Heat exchanger tubes are essential components of a heat exchanger, facilitating the exchange of heat between two media. During tube production, support strips are welded to the tube's circumference to increase its strength. However, welding these support strips requires maintaining a predetermined distance between the tube's head and tail ends, as well as a predetermined spacing between the multiple spiral sections. Existing heat exchanger tube welding processes struggle to achieve this. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a heat exchanger tube welding process that, when welding support bars to the heat exchanger tube, maintains a preset distance between the head and tail ends of the heat exchanger tube, and also maintains a preset distance between the helical intervals of the multiple helical sections of the heat exchanger tube.

[0004] According to an embodiment of the present invention, a heat exchanger tube welding process is provided, wherein the heat exchanger tube has a head end and a tail end, and the heat exchanger tube is spirally formed into a plurality of sequentially connected spiral portions. The heat exchanger tube welding process uses a heat exchanger tube welding fixture and a support bar. The heat exchanger tube welding fixture includes a first positioning sleeve, a second positioning sleeve located below the first positioning sleeve, a first driving member, and a first support plate drivenly connected to the first driving member. The first support plate is provided with a first serrated portion. The heat exchanger tube welding process includes:

[0005] Insert the head end into the first positioning sleeve;

[0006] Insert the tail end into the second positioning sleeve;

[0007] The first driving member is used to drive the first support plate to move, and the first serrated part engages with the plurality of spiral parts;

[0008] The support bar is welded to the peripheral wall of the heat exchange tube along the axial direction of the heat exchange tube.

[0009] The heat exchange tube welding process according to the embodiments of the present invention has at least the following beneficial effects: since the head end is inserted into the first positioning sleeve and the tail end is inserted into the second positioning sleeve, the head end and the tail end of the heat exchange tube can maintain a preset distance; at the same time, since the first serrated part cooperates with multiple spiral parts, the spiral interval between the multiple spiral parts can maintain a preset distance.

[0010] According to one embodiment of the present invention, the support strip is provided with multiple strips, and the step of welding the support strips to the peripheral wall of the heat exchange tube along the axial direction of the heat exchange tube includes:

[0011] Multiple support bars are sequentially welded to the circumferential wall of the heat exchange tube along the axial direction, and the multiple support bars are spaced apart along the circumferential direction of the heat exchange tube.

[0012] According to one embodiment of the present invention, the heat exchanger tube welding fixture further includes a second support plate and a third support plate, the second support plate having a second serrated portion, and the third support plate having a third serrated portion; the heat exchanger tube welding process further includes:

[0013] The plurality of the spiral portions are fitted into the second serrated portion;

[0014] The plurality of the spiral portions are fitted into the third serrated portion.

[0015] According to one embodiment of the present invention, the welding fixture further includes a lifting device, and the heat exchange tube welding process further includes:

[0016] At least one of the spiral sections is lifted using the lifting device.

[0017] According to one embodiment of the present invention, the lifting device includes a second driving member and a hook drivably connected to the second driving member, and the lifting of at least one of the spiral parts using the lifting device includes:

[0018] The hook is lowered using the second drive component;

[0019] The hook is engaged with the spiral part;

[0020] The second driving member drives the hook to rise and lifts at least one of the spiral parts to a preset height.

[0021] According to one embodiment of the present invention, the heat exchange tube welding fixture further includes a fourth support plate, the fourth support plate having a fourth serrated portion, the fourth serrated portion matching at least one of the spiral portions on the upper part of the heat exchange tube, and the step of using the lifting device to lift at least one of the spiral portions further includes:

[0022] The fourth support plate is fitted with the matching spiral portion.

[0023] According to one embodiment of the present invention, the fourth support plate is provided with a plurality of components, and the step of engaging the fourth support plate with the matching helical portion includes:

[0024] The plurality of fourth support plates are sequentially engaged with the matching spiral portion, and the plurality of fourth support plates are arranged at spiral intervals along the spiral portion.

[0025] According to one embodiment of the present invention, the heat exchanger tube welding fixture further includes a mounting bracket and a pressure rod, the pressure rod being movably disposed on the mounting bracket and capable of abutting against the head end, and the heat exchanger tube welding process further includes:

[0026] This causes the pressure rod to move downwards;

[0027] The pressure rod abuts against the head end, limiting the position of the head end.

[0028] According to one embodiment of the present invention, the pressure rod is threadedly connected to the mounting bracket, and the downward movement of the pressure rod includes:

[0029] Rotate the lever to move it downwards.

[0030] According to one embodiment of the present invention, the heat exchange tube welding fixture further includes a support base, and the heat exchange tube welding process further includes:

[0031] The heat exchange tube is placed on the support base.

[0032] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0034] Figure 1 This is a schematic diagram of a heat exchanger tube welding fixture according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the working process of a heat exchanger tube welding fixture according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the heat exchanger tube welding fixture according to another embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the heat exchanger tube welding fixture according to another embodiment of the present invention;

[0038] Figure 5 This is a working schematic diagram of the heat exchanger tube welding fixture from another angle according to an embodiment of the present invention;

[0039] Figure 6 This is a flowchart of a heat exchanger tube welding process according to an embodiment of the present invention.

[0040] Figure label:

[0041] 1000 heat exchanger tube welding fixtures;

[0042] Base plate 100;

[0043] First column 200; First column body 210; First positioning sleeve 220; Second positioning sleeve 230;

[0044] Second column 300; Second column body 310; First driving component 320; First support plate 330; First serrated part 331;

[0045] Third column 400; Third column body 410; Second support plate 420; Second serrated part 421;

[0046] Fourth column 500; Fourth column body 510; Third support plate 520; Third serrated part 521;

[0047] Second drive component 610; hook 620;

[0048] Fourth support plate 700; Fourth serrated section 710;

[0049] Mounting bracket 810; pressure bar 820;

[0050] Support base 900;

[0051] Heat exchange tube 2000; head end 2100; tail end 2200; spiral section 2300. Detailed Implementation

[0052] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0053] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, inside, outside, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0054] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0055] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0056] Heat exchanger tubes are essential components of a heat exchanger, facilitating the exchange of heat between two media. During tube production, support strips are welded to the tube's circumference to increase its strength. However, welding these support strips requires maintaining a predetermined distance between the tube's head and tail ends, as well as a predetermined spacing between the multiple spiral sections. Existing heat exchanger tube welding processes struggle to achieve this.

[0057] Therefore, one embodiment of the present invention provides a welding process for heat exchange tube 2000, as detailed in the accompanying drawings. Figures 1 to 6 As shown.

[0058] According to one embodiment of the present invention, a welding process for a heat exchange tube 2000 is provided, wherein the heat exchange tube 2000 is spirally formed into a plurality of sequentially connected spiral portions 2300. (See reference...) Figure 2 As shown, it should be noted that one spiral section 2300 is the portion of the heat exchange tube 2000 that spirals once. Additionally, the heat exchange tube 2000 has a head end 2100 and a tail end 2200. It should be noted that the head end 2100 of the heat exchange tube 2000 is connected to the uppermost spiral section 2300, and the tail end 2200 of the heat exchange tube 2000 is connected to the lowermost spiral section 2300.

[0059] It should be noted that the welding process for heat exchanger tube 2000 uses heat exchanger tube 2000 welding fixture 1000 and support bars (not shown in the figure). In one embodiment, multiple support bars are provided. (Refer to...) Figure 1 As shown, an embodiment of the present invention discloses a welding fixture 1000 for a heat exchanger tube 2000. The welding fixture 1000 includes a base plate 100, a first column 200, and a second column 300. The base plate 100 is placed on the ground. The first column 200 is fixed to the upper surface of the base plate 100. In one embodiment, the first column 200 is welded to the upper surface of the base plate 100. (Refer to...) Figure 1 As shown, the first column 200 includes a first column body 210, a first positioning sleeve 220, and a second positioning sleeve 230. Both the first positioning sleeve 220 and the second positioning sleeve 230 are connected to the first column body 210, with the first positioning sleeve 220 positioned above the second positioning sleeve 230. In one embodiment, both the first positioning sleeve 220 and the second positioning sleeve 230 are welded to the first column body 210. The first positioning sleeve 220 matches the head end 2100, and the second positioning sleeve 230 matches the tail end 2200.

[0060] Reference Figure 1 As shown, it should be noted that the second column 300 is fixed to the upper surface of the base plate 100 and spaced apart from the first column 200. In one embodiment, the second column 300 is welded to the upper surface of the base plate 100. Continuing to refer to... Figure 1As shown, the second column 300 includes a second column body 310, a first driving member 320, and a first support plate 330. The first support plate 330 is located on the side of the second column body 310 near the first column 200, and a first serrated portion 331 is provided on the side of the first support plate 330 away from the second column body 310. The first serrated portion 331 mates with a plurality of spiral portions 2300. Furthermore, the first driving member 320 is connected to the second column body 310 and is drivenly connected to the first support plate 330. The first driving member 320 drives the first support plate 330 to move, so that the first serrated portion 331 engages with the plurality of spiral portions 2300. It should be noted that the first serrated portion 331 has multiple serrations.

[0061] Reference Figure 1 As shown in the figure, in one embodiment of the present invention, the welding process of the heat exchange tube 2000 includes a support base 900. The support base 900 is fixed to the upper surface of the base plate 100 and located between the first column 200 and the second column 300. In one embodiment, the support base 900 is welded to the upper surface of the base plate 100. The support base 900 is used to support the heat exchange tube 2000.

[0062] Reference Figure 3 As shown, in one embodiment of the present invention, the welding process of the heat exchange tube 2000 includes a third column 400 and a fourth column 500 in the welding fixture 1000. The third column 400, the fourth column 500, the first column 200, and the second column 300 are all spaced apart, and both the third column 400 and the fourth column 500 are fixed to the upper surface of the base plate 100. In one embodiment, both the fourth column 500 and the third column 400 are welded to the upper surface of the base plate 100. The third column 400 includes a third column body 410 and a second support plate 420 connected to the third column body 410. The second support plate 420 has a second serrated portion 421 on the side away from the third column body 410. The second serrated portion 421 is matched with a plurality of spiral portions 2300. The fourth column 500 includes a fourth column body 510 and a third support plate 520 connected to the fourth column body 510. The third support plate 520 has a third serrated portion 521 on the side away from the fourth column body 510. The third serrated portion 521 is matched with a plurality of spiral portions 2300.

[0063] According to one embodiment of the present invention, a welding process for a heat exchanger tube 2000 is provided. The welding fixture 1000 for the heat exchanger tube 2000 further includes a lifting device. (See reference...) Figure 1 As shown, in one embodiment, the lifting device includes a second drive member 610 and a hook 620, with the second drive member 610 and the hook 620 being driven together.

[0064] Reference Figure 4As shown, in one embodiment of the present invention, a welding process for a heat exchanger tube 2000 is described. The welding fixture 1000 for the heat exchanger tube 2000 further includes a mounting bracket 810 and a pressure rod 820, the pressure rod 820 being movably mounted on the mounting bracket 810. In one embodiment, the mounting bracket 810 is connected to a third column 410 and a fourth column 510. In another embodiment, the pressure rod 820 is threadedly connected to the mounting bracket 810.

[0065] Reference Figure 5 As shown, in one embodiment of the present invention, the welding process of a heat exchange tube 2000 includes a fourth support plate 700. The fourth support plate 700 has a fourth serrated portion 710, which matches at least one spiral portion 2300 on the upper part of the heat exchange tube 2000. (Continuing to refer to...) Figure 5 As shown, in one embodiment, the fourth support plate 700 is provided with multiple supports.

[0066] Reference Figure 6 As shown, one embodiment of the present invention describes a welding process for a heat exchanger tube 2000, the welding process for the heat exchanger tube 2000 includes:

[0067] Place the heat exchange tube 2000 on the support base 900;

[0068] Insert the head end 2100 into the first positioning sleeve 220;

[0069] Insert the tail end 2200 into the second positioning sleeve 230;

[0070] Multiple spiral portions 2300 are fitted to the second serrated portion 421;

[0071] Multiple spiral sections 2300 are fitted to the third serrated section 521;

[0072] The first drive unit 320 drives the first support plate 330 to move, and the first serrated part 331 engages with the multiple spiral parts 2300.

[0073] Move the pressure bar 820 downwards;

[0074] The pressure rod 820 abuts against the head end 2100, limiting the head end 2100;

[0075] At least one screw section 2300 is lifted using a lifting device;

[0076] The support bar is welded to the peripheral wall of the heat exchange tube 2000 along the axial direction of the heat exchange tube 2000.

[0077] Understandably, placing the heat exchange tube 2000 on the support base 900 increases its placement height, facilitating welding. Additionally, it should be noted that the distance between the first positioning sleeve 220 and the second positioning sleeve 230 is the preset distance between the head end 2100 and the tail end 2200. Therefore, when the head end 2100 engages with the first positioning sleeve 220 and the tail end 2200 engages with the second positioning sleeve 230, the preset distance between the head end 2100 and the tail end 2200 of the heat exchange tube 2000 can be maintained. It should be noted that the second serrated portion 421 has multiple serrations, and the gaps between the multiple spiral portions 2300 correspond one-to-one with the multiple serrations. Therefore, the second serrated portion 421 can maintain a preset distance between the spiral intervals of the multiple spiral portions 2300 of the heat exchange tube 2000 by cooperating with the multiple spiral portions 2300. The third serrated portion 521 has multiple serrations, and the gaps between the multiple spiral portions 2300 correspond one-to-one with the multiple serrations. Therefore, the third serrated portion 521 can maintain a preset distance between the spiral intervals of the multiple spiral portions 2300 of the heat exchange tube 2000 by cooperating with the multiple spiral portions 2300.

[0078] It should be noted that the first serrated portion 331 has multiple serrations, and the gaps between the multiple spiral portions 2300 correspond one-to-one with the multiple serrations. Therefore, the first serrated portion 331 can maintain a preset distance between the spiral intervals of the multiple spiral portions 2300 of the heat exchange tube 2000 by cooperating with the multiple spiral portions 2300. In one embodiment, the first driving member 320 is a cylinder. It can be understood that the pressure rod 820 limits the head end 2100, which can prevent the head end 2100 from tilting.

[0079] It should be noted that when multiple support bars are provided, welding the support bars to the peripheral wall of the heat exchange tube 2000 along the axial direction of the heat exchange tube 2000 includes:

[0080] Multiple support bars are sequentially welded to the circumferential wall of the heat exchange tube 2000 along the axial direction, and the multiple support bars are spaced apart along the circumference of the heat exchange tube 2000.

[0081] Understandably, welding multiple support bars makes the structure of the heat exchange tube 2000 more stable.

[0082] It should be noted that lifting at least one spiral section 2300 using a lifting device includes:

[0083] The hook 620 is lowered using the second drive unit 610;

[0084] The fourth support plate 700 is fitted with the matching spiral part 2300;

[0085] The hook 620 is fitted with the screw part 2300;

[0086] The second drive unit 610 drives the hook 620 to rise and lift at least one spiral part 2300 to a preset height.

[0087] It should be noted that by setting the fourth support plate 700, a preset distance can be maintained between the multiple spiral sections 2300 lifted by the lifting device. It should also be noted that after the lifting device lifts at least one spiral section 2300, a clearance is formed between the lifted spiral section 2300 and the unlifted spiral section 2300. In the use of the heat exchange tube 2000, this clearance helps to achieve good space utilization. In one embodiment, after the heat exchange tube 2000 forms a clearance, a pad (not shown in the figure) is placed in the clearance to facilitate subsequent welding.

[0088] It should be noted that multiple fourth support plates 700 are provided, and the engagement of the fourth support plate 700 with its matching spiral part 2300 includes:

[0089] Multiple fourth support plates 700 are sequentially engaged with their matching spiral portions 2300, and the multiple fourth support plates 700 are arranged at spiral intervals along the spiral portions 2300.

[0090] Understandably, by setting multiple fourth support plates 700, the at least one suspended spiral section 2300 can better maintain the preset distance.

[0091] It should be noted that when the pressure rod 820 is threadedly connected to the mounting bracket 810, moving the pressure rod 820 downward includes:

[0092] Rotate the pressure bar 820 to move it downward.

[0093] Understandably, with the above settings, the structure of the pressure bar 820 and the mounting bracket 810 is simpler and the operation is more convenient.

[0094] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat exchanger tube welding process, wherein the heat exchanger tube has a head end and a tail end, and the heat exchanger tube is spirally formed into multiple sequentially connected spiral portions. The heat exchanger tube welding process uses a heat exchanger tube welding fixture and support bars. The heat exchanger tube welding fixture includes a first positioning sleeve, a second positioning sleeve located below the first positioning sleeve, a first driving member, and a first support plate drivenly connected to the first driving member. The first support plate has a first serrated portion. The heat exchanger tube welding fixture further includes a lifting device and a fourth support plate. The fourth support plate has a fourth serrated portion, which matches at least one of the spiral portions on the upper part of the heat exchanger tube. The lifting device includes a second driving member and a hook drivenly connected to the second driving member. The heat exchanger tube welding fixture further includes a mounting frame and a pressure rod. The pressure rod is movably disposed on the mounting frame and can abut against the head end. Multiple fourth support plates are provided. The heat exchange tube welding process includes: Insert the head end into the first positioning sleeve; Insert the tail end into the second positioning sleeve; The first driving member is used to drive the first support plate to move, and the first serrated part engages with the plurality of spiral parts; The support bar is welded to the peripheral wall of the heat exchange tube along the axial direction of the heat exchange tube. The plurality of fourth support plates are sequentially engaged with the matching spiral portion, and the plurality of fourth support plates are arranged at spiral intervals along the spiral portion; The hook is lowered using the second drive component; The hook is engaged with the spiral part; The second driving member drives the hook to rise and lifts at least one of the spiral parts to a preset height; This causes the pressure rod to move downwards; The pressure rod abuts against the head end, limiting the position of the head end.

2. The heat exchanger tube welding process according to claim 1, characterized in that, The support bars are provided in multiple forms, and the step of welding the support bars to the peripheral wall of the heat exchange tube along the axial direction of the heat exchange tube includes: Multiple support bars are sequentially welded to the circumferential wall of the heat exchange tube along the axial direction, and the multiple support bars are spaced apart along the circumferential direction of the heat exchange tube.

3. The heat exchanger tube welding process according to claim 1, characterized in that, The heat exchanger tube welding fixture further includes a second support plate and a third support plate. The second support plate has a second serrated portion, and the third support plate has a third serrated portion. The heat exchanger tube welding process further includes: The plurality of the spiral portions are fitted into the second serrated portion; The plurality of the spiral portions are fitted into the third serrated portion.

4. The heat exchanger tube welding process according to claim 1, characterized in that, The pressure rod is threadedly connected to the mounting bracket, and moving the pressure rod downward includes: Rotate the lever to move it downwards.

5. The heat exchanger tube welding process according to claim 1, characterized in that, The heat exchanger tube welding fixture also includes a support base, and the heat exchanger tube welding process also includes: Place the heat exchange tube on the support base.

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