Wire welding tube and welding method thereof

Abstract

The invention discloses a wire welding pipe and a welding method thereof, comprising wrapping welding pipes located at two sides and a lap welding pipe located in the middle, wherein a spiral lap welding sheet is arranged inside the lap welding pipe, a connecting hole is opened on the surface of the lap welding sheet, and a welding injection hole is opened on the side wall of the lap welding pipe; the lap welding pipe, the lap welding sheet and the connection method thereof proposed by the invention change the traditional lap welding or wrapping welding method of two wires, the spiral structure of the lap welding sheet can improve the lap connection method of the wire and the lap welding sheet, increase the contact area between the wire and the lap welding sheet, and make the connection between the wires more reliable; when the two wires are subjected to pulling forces in opposite directions along the axial direction of the welding pipe, the lap welding sheet plays a blocking role in the middle of the wires wrapped on both sides, and the wires are less likely to loosen.

Description

Technical Field

[0001] The invention relates to the technical field of wire welding, in particular to a wire welding pipe and a welding method thereof. Background Art

[0002] The welding between wires in the circuit is usually achieved by lap welding, hook welding, and wrap welding. Lap welding is to overlap a tinned wire to another tinned wire. This method is the simplest, but the lowest strength and the worst reliability. Hook welding is to bend the tinned wire into a hook shape, connect them together and clamp them with pliers before welding. The strength of hook welding is higher than lap welding. Wrap welding is to wrap and tighten the tinned wire before welding. It has the highest reliability. When the reliability of wire welding is required to be high, the wrap welding method is usually used. However, the tin liquid must fully penetrate into the gap between the twisted wire cores during wrap welding. If the penetration is not sufficient, the connection strength between the core wires is insufficient and it is easy to desolder. In addition, the tin liquid is coated on the surface of the wire core, and it is difficult to make the joint smooth and flat. The welding process requirements for the welder are high. If there is a sharp tip on the joint surface, it may penetrate the insulating tape or heat shrink tubing wrapped outside, reducing the insulation effect. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a wire welding pipe and a welding method thereof to solve the problems raised in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a wire welding tube, including a wrap-welded tube located on both sides and a lap-welded tube located in the middle, the lap-welded tube is provided with a spiral lap-welded sheet inside, the surface of the lap-welded sheet is provided with a connecting hole, and the side wall of the lap-welded tube is provided with an injection welding hole.

[0005] Preferably, the side wall of the welded pipe is also provided with an injection welding hole.

[0006] Preferably, the edge of the lap welding sheet contacts the inner wall of the lap welding tube.

[0007] Preferably, the edge of the lap welding sheet is welded to the inner wall of the lap welding pipe.

[0008] Preferably, the lap-welded pipe and the lap-welded pipe are both cylindrical structures with the same diameter, and are interconnected and welded together.

[0009] Preferably, the lap-welded pipe and the overlap-welded pipe are respectively the two side regions and the middle region of the integrally formed pipeline.

[0010] Preferably, the injection welding holes opened on the side wall of the lap-welded pipe are located in the side wall area corresponding to the lap-welded sheet.

[0011] In addition, the present invention also discloses a welding method for the wire welded pipe, which comprises the following steps:

[0012] 1) Insert the wire core of a conductor on the left side from the left side of the welding tube, pass through the left side of the welding tube and enter the side of the lap welding piece of the lap welding tube. The wire core twists along the spiral structure of the lap welding piece and passes through the lap welding tube, enters the right side of the welding tube, and then passes through the right side of the welding tube, revealing the wire core head;

[0013] 2) Insert the wire core of the other wire on the right side from the right side of the welding tube, pass through the right side of the welding tube and enter the other side of the lap welding piece of the lap welding tube. The wire core twists along the spiral structure of the lap welding piece and passes through the lap welding tube, enters the left side of the welding tube, and then passes through the left side of the welding tube, revealing the wire core head;

[0014] 3) On the left side of the welding tube, pinch the root of the left wire core and the head of the right wire core passing through the welding tube, and tighten the two wire cores in the same twisting direction as the twisting direction of the right wire core passing through the lap welding tube, so that the two wire cores are tightly wound around the welding tube on the left side and extend to the left end of the lap welding piece;

[0015] 4) On the right side of the welding tube, pinch the root of the wire core on the right side and the head of the wire core on the left side passing through the welding tube, and tighten the two wire cores in the same twisting direction as the twisting direction of the left wire core passing through the lap welding tube, so that the two wire cores are tightly wound around the welding tube on the right side and extend to the right end of the lap welding piece;

[0016] 5) Pinch the two wires on the left and right sides of the welding tube at the same time, and tighten the two wire cores on both sides according to the original twisting direction, so that the winding parts of the two wire cores are squeezed from the left and right sides to the left and right ends of the welding piece at the same time, so that the two wire cores and the welding piece are tightly wound;

[0017] 6) Place the solder wire at the opening of the soldering hole of the lap welding tube, use an electric soldering iron to melt the solder wire into tin liquid, inject the tin liquid into the lap welding tube, and fill the lap welding tube. The tin liquid will fully penetrate into the joints of the two wire cores and the connecting holes of the lap welding piece, so that the two wire cores are fully welded with the lap welding piece and the lap welding tube;

[0018] 7) Place the solder wire at the opening of the injection hole of the left side welding tube, use an electric soldering iron to melt the solder wire into tin liquid, inject the tin liquid into the welding tube until it is full, and fully penetrate the joint of the two wire cores to fully weld the two wire cores to the left side welding tube;

[0019] 8) Place the solder wire at the opening of the solder injection hole of the right side welding tube, use an electric soldering iron to melt the solder wire into tin liquid, inject the tin liquid into the welding tube until it is full, and fully penetrate the tin liquid into the joint of the two wire cores, so that the two wire cores are fully welded to the right side welding tube.

[0020] Furthermore, it also includes the following steps:

[0021] 9) Use diagonal pliers to cut off the excess wire ends of the left and right wire cores of the welding tube, move the heat shrink tubing to the welding tube, make the heat shrink tubing completely cover the exposed metal part, and then use a hot air gun to blow the heat shrink tubing to make the heat shrink tubing tightly cover the joint.

[0022] Preferably, in step 6), during injection welding, it is ensured that the injection hole of the lap welded tube is also filled with welding liquid, and after the welding liquid solidifies, a convex point is formed from the inside of the lap welded tube to the outer wall of the lap welded tube, and the height of the convex point is less than or equal to the thickness of the tube wall;

[0023] In the step 7), during injection welding, it is necessary to ensure that the injection hole of the left side welded pipe is also filled with welding liquid, and after the welding liquid solidifies, a convex point is formed from the inside of the welded pipe to the outer wall of the welded pipe, and the height of the convex point is less than or equal to the thickness of the pipe wall;

[0024] In step 8), during injection welding, ensure that the injection hole of the right side welded pipe is also filled with welding liquid. After the welding liquid solidifies, a convex point is formed from the inside of the welded pipe to the outer wall of the welded pipe, and the height of the convex point is less than or equal to the pipe wall thickness.

[0025] Beneficial effects of the present invention:

[0026] 1) The lap-welded tube, lap-welded sheet and connection method thereof proposed in the present invention change the traditional lap-welding or wrapping method of two wires. The spiral structure of the lap-welded sheet can improve the lap connection method between the wire and the lap-welded sheet, increase the contact area between the wire and the lap-welded sheet, and make the connection between the wires more reliable. When the two wires are subjected to pulling forces in opposite directions along the axial direction of the welded tube, the lap-welded sheet acts as a barrier between the wires wrapped on both sides, and the wires are less likely to loosen.

[0027] 2) The lap-welded tube, wrap-welded tube and welding method thereof proposed in the present invention improve the process requirements of traditional direct lap welding or wrap-welding of two wires. The welding liquid only needs to be filled into the welding tube through three welding holes. Even if the welding liquid does not penetrate sufficiently into the welding tube, it will not affect the reliability of the wire connection. There is no need to worry about the smoothness of the joint as in traditional welding methods.

[0028] 3) The three welding holes used in the present invention are conducive to injecting welding liquid into the welding pipe, and the two wire cores, the welding piece, the pipe wall, etc. in the welding pipe are welded into one by the welding liquid, which reduces the difficulty of the welding process and increases the welding reliability.

[0029] 4) In the present invention, the injection welding hole of the lap-welded pipe is located at the separation of the upper and lower areas of the lap-welded pipe, and the structure is simple and ingenious. A hole is opened in the outer pipe to simultaneously weld the upper and lower areas separated by the lap-welded sheet.

[0030] 5) The connecting holes on the lap welding plate in the present invention facilitate the rapid flow of soldering liquid between the upper and lower areas, reduce the difficulty of the welding process, and increase the welding reliability of the conductor. After the soldering liquid in the connecting holes solidifies, it can limit the axial displacement of the two wire cores under the action of external force to a certain extent.

[0031] 6) The present invention is a straight-tube structure, and only the lap-welded tube in the middle is provided with a lap-welded sheet, which has a simple and stable structure, is easy to produce, and has low cost.

[0032] 7) The convex points formed after the injection holes of the lap-welded pipe and the wrap-welded pipe and the connecting holes of the lap-welded sheet are filled with solder are helpful to enhance the welding reliability of the welded pipe. Even if the solder in the welded pipe is not fully welded to the pipe wall, the convex points can limit the relative displacement of the connector in the pipe and the pipe wall under the action of external force.

[0033] 8) The coordination of the welding tube, the lap welding piece, the injection hole, the connecting hole and the solder, as well as the twisting shape and winding method of the two wires in the tube, make it easier for the two wire cores and the welding tube to form a firm weld. Even if the welding process level is insufficient and individual areas in the welding tube are not filled with welding liquid, it will not cause connection failure, and has a better welding process fault tolerance level.

[0034] 9) The present invention realizes the butt connection of the wire cores through a welding tube. Compared with the traditional welding method, the welding tube has a smooth surface and high mechanical strength, which is convenient for wrapping insulating tape or heat shrink tubing on the outer surface. There will be no pointed ends due to the difference in welding level, which will affect the external insulation of the insulating tape or heat shrink tubing.

[0035] 10) The present invention is composed of one section of lap-welded tube and two sections of wrap-welded tube, with the lap-welded tube in the middle and the wrap-welded tubes on both sides. There is a spiral lap-welded sheet in the middle of the lap-welded tube. The two butt-jointed wire cores are overlapped in the lap-welded tube by the spiral lap-welded sheet and are wrap-welded in the hollow wrap-welded tubes on both sides. The contact surface of the two wire cores is relatively large. The overlap between the wire core and the lap-welded sheet, together with the wrapping of the wire cores on both sides, realizes a reliable connection, and can withstand relatively large axial and radial tensile forces without causing connection failure.

[0036] 11) The present invention realizes the injection and circulation of welding liquid into various areas in the welding pipe through the welding holes of the lap welding pipe and the wrap welding pipe and the connecting holes of the lap welding plate, so that the welding pipe, the wire core and the lap welding plate are connected as a whole to form a firm and reliable electrical connection. The solder bumps formed by the three welding holes belong to three different functional areas, which can enable the connector to withstand greater and more directional forces without causing connection failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a three-dimensional structural schematic diagram of a wire welding tube;

[0038] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure after removing the lap-welded pipe;

[0039] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure from another perspective;

[0040] Figure 4 It is a schematic diagram of the decomposition process of the left wire core passing through the welding pipe from the left side during the welding process;

[0041] Figure 5 This is a schematic diagram of the right wire core passing through the welding tube from the right side during the welding process;

[0042] Figure 6 This is a schematic diagram of the wire core being tightened around the welding tube on both sides during the welding process. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] like Figures 1 to 3 As shown, a wire welding tube includes a wrap-around welding tube 1 located on both sides and a lap welding tube 2 located in the middle, wherein a spiral lap welding piece 3 is provided inside the lap welding tube 2, a connecting hole 4 is opened on the surface of the lap welding piece 3, and an injection welding hole 5 is opened on the side wall of the lap welding tube 2.

[0045] Preferably, the side wall of the wrapping welding tube 1 is also provided with a welding hole 5. The traditional wrapping welding method has high requirements on the welding process, and it is necessary to control the solder at the joint to be smooth and flat, and not to form thorns, otherwise it will pierce the heat shrink tube and affect the insulation at the joint. The present invention injects solder liquid into different areas of the welding tube through the welding hole 5, so that the wire core and the welding tube are fully welded. The solder liquid is in the welding tube, which has low requirements on the welding process, is not easy to form thorns, and is unlikely to cause adverse effects on the heat shrink tube sleeve.

[0046] Preferably, the edge of the lap welding sheet 3 contacts the inner wall of the lap welding tube 2 .

[0047] Preferably, the edge of the lap welding sheet 3 is welded to the inner wall of the lap welding tube 2 .

[0048] Preferably, the wrap-around welded pipe 1 and the lap-welded pipe 2 are both cylindrical structures with the same diameter, and are connected to each other and welded together.

[0049] Preferably, the lap-welded pipe 1 and the lap-welded pipe 2 are respectively the two side regions and the middle region of the integrally formed pipeline.

[0050] Preferably, the injection welding hole 5 opened on the side wall of the lap welded pipe 2 is located in the side wall area corresponding to the lap weld sheet 3. After such design, the injection welding hole 5 of the lap welded pipe 2 is located at the separation of the upper and lower areas of the lap welded pipe 2, and the structure is simple and ingenious, that is, a hole is opened in the outer pipe to simultaneously perform injection welding construction on the upper and lower areas separated by the lap weld sheet 3.

[0051] Preferably, the lap-welded tube 2 is a straight hollow structure, and the tube wall can be made of copper or aluminum. The copper tube is suitable for connecting copper core wires, and the aluminum tube is suitable for connecting aluminum core wires. The tube wall material of the wrap-welded tube 1 is the same as that of the lap-welded tube 2.

[0052] In addition, the present invention also discloses a welding method for the above-mentioned wire welding tube, which is applicable to the welding of a single-strand copper core wire, a single-strand aluminum core wire, multiple-strand copper core wires, and multiple-strand aluminum core wires, and comprises the following steps:

[0053] 1) If Figure 4 As shown, the core of a wire on the left side is inserted from the left side of the welding tube, and the core passes through the left side of the welding tube 1 and enters the side of the welding piece 3 of the welding tube 2. The core is twisted by the spiral structure of the welding piece 3 and then passes through the welding tube 2, enters the welding tube 1 on the right side, and then passes through the welding tube 2 on the right side, revealing the core head; in the actual welding process, in order to implement welding, the wire and the core should be processed first. If it is a wire with an outer sheath, the outer sheath should be stripped to expose the bare core slightly longer than the welding tube, and the oxide layer and sticky dirt on the exposed part of the core should also be removed. If a heat shrink sleeve is to be used in the end, a heat shrink sleeve slightly longer than the welding tube needs to be put on the wire in advance.

[0054] 2) If Figure 5 As shown, the wire core of another wire on the right side is inserted from the right side of the welding tube, and the wire core passes through the right side of the welding tube 1 and enters the other side of the lap welding piece 3 of the lap welding tube 2. The wire core is twisted along with the spiral structure of the lap welding piece 3 and then passes through the lap welding tube 2, enters the left side of the welding tube 1, and then passes through the left side of the welding tube 2, leaking the wire core head;

[0055] 3) On the left side of the welding tube, pinch the root of the left wire core and the head of the right wire core passing through the welding tube, and tighten the two wire cores in the same twisting direction as the twisting direction of the right wire core passing through the lap welding tube 2, so that the two wire cores are tightly wound around the welding tube 1 on the left side and extend to the left end of the lap welding piece 3;

[0056] 4) On the right side of the welding tube, pinch the root of the wire core on the right side and the head of the wire core on the left side passing through the welding tube, and tighten the two wire cores in the same twisting direction as the twisting direction of the left wire core passing through the lap welding tube 2, so that the two wire cores are tightly wound around the welding tube 1 on the right side and extend to the right end of the lap welding piece 3;

[0057] 5) If Figure 6As shown, pinch the two wires on the left and right sides of the welding tube at the same time, and tighten the two wire cores on the left and right sides according to the original twisting direction at the same time, so that the winding parts of the two wire cores are squeezed from the left and right sides to the left and right ends of the welding piece 3 at the same time, so that the two wire cores are tightly wound with the welding piece 3;

[0058] 6) Place the solder wire at the opening of the injection hole 5 of the lap welding tube 2, melt the solder wire into tin liquid with an electric soldering iron, inject the tin liquid into the lap welding tube 2, and fill the lap welding tube. The tin liquid will fully penetrate into the joint of the two wire cores and the connecting hole 4 of the lap welding piece 3, so that the two wire cores are fully welded with the lap welding piece 3 and the lap welding tube 2;

[0059] 7) Place the solder wire at the opening of the injection hole 5 of the left side welding tube 1, melt the solder wire into tin liquid with an electric soldering iron, and inject the tin liquid into the welding tube 1 until it is full. The tin liquid fully penetrates into the joint of the two wire cores, so that the two wire cores are fully welded to the left side welding tube 1;

[0060] 8) Place the solder wire at the opening of the soldering hole 5 of the right side welding tube 1, use an electric soldering iron to melt the solder wire into tin liquid, inject the tin liquid into the welding tube 1 until it is full, and fully penetrate the joint of the two wire cores to fully weld the two wire cores to the right side welding tube 1.

[0061] According to the traditional winding method, if one wire core is subjected to a large pulling force to the left, and the other wire core is subjected to a large pulling force to the right, the wire cores are easy to detach to the left and right sides along the winding direction, resulting in connection failure. Even if soldering is used at the joint, if the welding process is poor, it may also detach under the action of external force, resulting in connection failure. The present invention proposes that the butt-jointed wire cores are overlapped in the lap-welded tube 2 by a spiral lap-welded sheet 3. Under the action of external force, if the two wire cores want to detach from each other, they will be blocked by the lap-welded sheet 3. Compared with the traditional winding method, a larger external force is required to make the wire core connection fail, so the connection of this method is more reliable.

[0062] According to the traditional winding welding method, soldering is the most critical process for fixing the two wire cores of the winding connection. Once the welding process is poor, it is easy to cause the connection to be separated. The present invention realizes the injection and circulation of welding liquid into various areas in the welding pipe through the welding holes 5 of the winding welding pipe 1 and the lap welding pipe 2 and the connecting holes 4 of the lap welding piece 3, so that the welding pipe, the wire core and the lap welding piece 3 are connected as a whole to form a firm and reliable electrical connection. In particular, in the lap welding pipe 2, the two wire cores are welded to the lap welding piece 3 respectively, the welding liquid is easier to penetrate into the joint, the welding process requirements are lower, and the connection is more reliable.

[0063] Furthermore, it also includes the following steps:

[0064] 9) Use diagonal pliers to cut off the excess wire ends of the left and right wire cores of the welding tube, move the heat shrink tubing to the welding tube, make the heat shrink tubing completely cover the exposed metal part, and then use a hot air gun to blow the heat shrink tubing to make the heat shrink tubing tightly cover the joint.

[0065] Preferably, in step 6), during injection welding, it is necessary to ensure that the injection hole 5 of the lap-welded tube 2 is also filled with welding liquid, and after the welding liquid solidifies, a convex point is formed from the inside of the lap-welded tube 2 to the outer wall of the lap-welded tube 2, and the height of the convex point is less than or equal to the thickness of the tube wall;

[0066] In the step 7), during injection welding, it is necessary to ensure that the injection hole 5 of the left side welding tube 1 is also filled with welding liquid, and after the welding liquid solidifies, a convex point is formed from the inside of the welding tube 1 to the outer wall of the welding tube 1, and the height of the convex point is less than or equal to the thickness of the tube wall;

[0067] In step 8), during injection welding, ensure that the injection hole 5 of the right side welded tube 1 is also filled with welding liquid. After the welding liquid solidifies, a convex point is formed from the inside of the welded tube 1 to the outer wall of the welded tube 1, and the height of the convex point is less than or equal to the tube wall thickness.

[0068] In this embodiment, the closer the thickness of the protrusion is to the thickness of the tube wall, the better, but it should not form a sharp point protruding from the outside of the tube wall to avoid affecting the subsequent process of winding the insulating tape or heat shrink tubing.

[0069] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for welding a wire-welded pipe, the wire-welded pipe comprising a wrap-around welded pipe (1) located at two sides and a lap-welded pipe (2) located in the middle, the lap-welded pipe (2) having a spiral lap-welded sheet (3) disposed inside, the lap-welded sheet (3) having a connecting hole (4) disposed on a surface thereof, and the lap-welded pipe (2) having a side wall provided with a welding injection hole (5); the method is characterized in that: It includes the following steps: 1) Insert the wire core of a left conductor from the left side of the welding tube, pass through the left side wrapping welding tube (1) and enter the side of the lap welding piece (3) of the lap welding tube (2), and the wire core is twisted along the spiral structure of the lap welding piece (3) and then passes through the lap welding tube (2), enters the right side wrapping welding tube (1), and then passes through the right side wrapping welding tube (2), revealing the wire core head; 2) Insert the wire core of the other wire on the right side from the right side of the welding tube, pass through the right side wrapping welding tube (1) and enter the other side of the lap welding piece (3) of the lap welding tube (2), and the wire core is twisted along with the spiral structure of the lap welding piece (3) and then passes through the lap welding tube (2), enters the left side wrapping welding tube (1), and then passes through the left side wrapping welding tube (2), revealing the wire core head; 3) On the left side of the welding tube, pinch the root of the left wire core and the head of the right wire core passing through the welding tube, and tighten the two wire cores in the same twisting direction as the twisting direction of the right wire core passing through the lap welding tube (2), so that the two wire cores are tightly wound around the left side of the welding tube (1) and extend to the left end of the lap welding piece (3); 4) On the right side of the welding tube, pinch the root of the wire core on the right side and the head of the wire core on the left side passing through the welding tube, and tighten the two wire cores in the same twisting direction as the twisting direction of the left wire core passing through the lap welding tube (2), so that the two wire cores are tightly wound around the welding tube (1) on the right side and extend to the right end of the lap welding piece (3); 5) Pinch the two wires on the left and right sides of the welding tube at the same time, and tighten the two wire cores on both sides in the original twisting direction, so that the winding parts of the two wire cores are squeezed from the left and right sides to the left and right ends of the welding piece (3) at the same time, so that the two wire cores are tightly wound with the welding piece (3); 6) Place the solder wire at the opening of the solder injection hole (5) of the lap welding tube (2), melt the solder wire into molten tin with an electric soldering iron, inject the molten tin into the lap welding tube (2), and fill the lap welding tube. The molten tin will fully penetrate into the joint of the two wire cores and the connecting hole (4) of the lap welding piece (3), so that the two wire cores are fully welded to the lap welding piece (3) and the lap welding tube (2); 7) Place the solder wire at the opening of the solder injection hole (5) of the left side solder wrapping tube (1), melt the solder wire into tin liquid with an electric soldering iron, and inject the tin liquid into the solder wrapping tube (1) until it is full. The tin liquid fully penetrates into the joint of the two wire cores, so that the two wire cores are fully welded to the left side solder wrapping tube (1); 8) Place the solder wire at the opening of the solder injection hole (5) of the right side welding tube (1), melt the solder wire into tin liquid with an electric soldering iron, and inject the tin liquid into the welding tube (1) until it is full. The tin liquid fully penetrates into the joint of the two wire cores, so that the two wire cores are fully welded to the right side welding tube (1).

2. The welding method of a wire-welded pipe according to claim 1, characterized in that: The side wall of the welded pipe (1) is also provided with a welding hole (5).

3. The welding method of a wire-welded pipe according to claim 1, characterized in that: The edge of the lap-welded sheet (3) contacts the inner wall of the lap-welded tube (2).

4. The welding method of a wire-welded pipe according to claim 1, characterized in that: The edge of the lap welding sheet (3) is welded to the inner wall of the lap welding pipe (2).

5. The welding method of a wire-welded pipe according to claim 1, characterized in that: The lap-welded pipe (1) and the lap-welded pipe (2) are both cylindrical structures with the same diameter, and are connected to each other and welded together.

6. The welding method of a wire-welded pipe according to claim 1, characterized in that: The wrap-around welded pipe (1) and the lap-welded pipe (2) are respectively the two side regions and the middle region of the integrally formed pipeline.

7. The welding method of a wire-welded pipe according to claim 1, characterized in that: The injection welding hole (5) opened on the side wall of the lap-welded tube (2) is located in the side wall area corresponding to the lap-welded sheet (3).

8. The welding method of a wire-welded pipe according to claim 1, characterized in that: It also includes the following steps: 9) Use diagonal pliers to cut off the excess wire ends of the left and right wire cores of the welding tube, move the heat shrink tubing to the welding tube, make the heat shrink tubing completely cover the exposed metal part, and then use a hot air gun to blow the heat shrink tubing to make the heat shrink tubing tightly cover the joint.

9. The welding method of a wire-welded pipe according to claim 1, characterized in that: In the step 6), during injection welding, it is ensured that the injection hole (5) of the lap-welded tube (2) is also filled with welding liquid, and after the welding liquid solidifies, a convex point is formed from the inside of the lap-welded tube (2) to the outer wall of the lap-welded tube (2), and the height of the convex point is less than or equal to the thickness of the tube wall; In the step 7), during injection welding, it is ensured that the injection welding hole (5) of the left side welding tube (1) is also filled with welding liquid, and after the welding liquid solidifies, a convex point is formed from the inside of the welding tube (1) to the outer wall of the welding tube (1), and the height of the convex point is less than or equal to the thickness of the tube wall; In the step 8), during injection welding, it is ensured that the injection welding hole (5) of the right side welded tube (1) is also filled with welding liquid, and after the welding liquid solidifies, a convex point is formed from the inside of the welded tube (1) to the outer wall of the welded tube (1), and the height of the convex point is less than or equal to the tube wall thickness.

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