A municipal construction metal pipeline welding device

Abstract

The application relates to the technical field, and discloses a metal pipeline welding device for municipal construction, which comprises a welding seat, two semicircular steel rails arranged on the two sides of the welding seat, a power component fixed on the welding seat, a functional groove arranged on the welding seat, a stroke sliding frame fixed in the functional groove, a displacement plate slidingly arranged on the stroke sliding frame, a thermal drive component fixed in the functional groove and the displacement plate, and a heat dissipation component fixed on the welding seat. The control panel of the application adjusts the output current of a welding battery, the current is transmitted to a nitinol wire through a positive electrode connecting rod, a negative electrode connecting rod and a metal joint, the nitinol wire is heated, the shortening amount of the nitinol wire is accurately controlled according to the current size, the current temperature control expansion and contraction characteristics of the nitinol wire are combined with the linear transmission of the displacement plate and the accurate angle conversion of the angle adjusting gear, millimeter-level fine adjustment of a welding joint is realized, the irregular welding gap can be efficiently adapted, and welding defects can be avoided.

Description

Technical Field

[0001] This invention relates to the field of metal pipe welding technology, and more specifically to a metal pipe welding device for municipal construction. Background Technology

[0002] In existing municipal construction, the welding of metal pipes typically relies on mechanical or pneumatic adjustments to regulate the weld head. These traditional methods have limitations, primarily in terms of precision and flexibility. Mechanical adjustment uses a series of gears, levers, and other mechanical components to adjust the weld head's position. While this method is relatively direct, the complexity of the mechanical structure often leads to significant errors during adjustment, and the precision required for fine adjustments is insufficient. Pneumatic adjustment uses air pressure to drive the weld head's movement. Although it offers some flexibility, pneumatic systems are generally slower in terms of precision and response speed, and are affected by the stability of the air source and air pressure fluctuations, making precise angle and position adjustments difficult.

[0003] Traditional adjustment methods often face the challenge of accurately adapting to irregular welding gaps when dealing with the welding needs of different types of metal pipes in municipal construction, easily leading to welding defects and affecting welding quality. At the same time, the complex adjustment mechanism increases the difficulty and time cost of operation, especially when frequent adjustments to the welding head angle and position are required, making manual adjustment errors more pronounced. Therefore, existing technologies have certain shortcomings in improving welding accuracy and construction efficiency, and there is an urgent need for a more precise, efficient, and easy-to-operate welding head adjustment device. Summary of the Invention

[0004] This invention provides a metal pipe welding device for municipal construction, used for effective welding of metal pipes.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, a metal pipe welding device for municipal construction includes: a welding base and two semi-circular steel rails disposed on both sides of the welding base, and further includes:

[0007] The power unit is fixed to the welding base; the functional slot is formed on the welding base; the travel slide frame is fixed inside the functional slot; the displacement plate is slidably set on the travel slide frame; the heat drive unit is fixed inside the functional slot and the displacement plate; the heat dissipation unit is fixed to the welding base; the angle adjustment rod has one end rotatably inserted into the displacement plate and the other end extends out of the welding base; the welding head is fixed to the end of the angle adjustment rod that extends out of the welding base; the sealing cover is fixed to the welding base; the welding battery is fixed to the welding base; and the control panel is fixed to the sealing cover.

[0008] Angle adjustment groove is formed inside the displacement plate;

[0009] Four heat drive frames are provided, with two frames forming a group. The two groups of heat drive frames are fixed within the functional slot and the angle adjustment slot, respectively. Four protective sleeves are provided, all equidistantly positioned on the same heat drive frame. A nitinol wire is located inside the protective sleeve and is used to heat and shorten its length after energization. A metal connector is fixed to both ends of the nitinol wire. A sealing cap is fixed to both ends of the protective sleeve, with the end furthest from the protective sleeve fixed to the heat drive frame. A positive electrode connecting rod has one end attached to the metal connector and the other end fixed to the insert. The components are: a negative electrode connecting rod with one end attached to a metal connector and the other end extending out of the closed cover; a spring sleeve fixed to both sides of the same heat drive frame; a piston rod with the piston end slidably inserted into the spring sleeve and the non-piston end extending out of the heat drive frame; a return spring with one end fixed inside the spring sleeve and the other end fixed to the piston end of the piston rod, used to apply external force to the nitinol wire to restore its initial length; and a linkage plate fixedly sleeved on the end of the negative electrode connecting rod extending out of the closed cover and fixed to the end of the piston rod extending out of the heat drive frame.

[0010] Furthermore, the heat drive component also includes:

[0011] The docking plate is fixed on both sides of the displacement plate, and the side away from the displacement plate is fixed on the linkage plate; the angle adjusting gear is fixed on the angle adjusting rod; the angle adjusting tooth plate has its non-tooth end fixed on the linkage plate, and its tooth end meshes with the angle adjusting gear.

[0012] Furthermore, an air inlet branch pipe is fixed to one end of the protective sleeve, and an air outlet branch pipe is fixed to the other end of the protective sleeve.

[0013] Furthermore, the heat sink includes:

[0014] A blower is fixed on the welding base; an air inlet main pipe is fixed on the blower; a first pair of connecting pipes is fixed inside the air inlet branch pipe and the air outlet branch pipe at the bottom; a first air inlet branch pipe is fixed on the air inlet main pipe at the middle position, and both ends are sleeved on the top of the first pair of connecting pipes; a first air outlet pipe is sleeved on the top of the first pair of connecting pipes at one end, and extends out of the welding base at the other end.

[0015] Furthermore, the heat sink also includes:

[0016] The second pair of connecting pipes is fixed inside the air inlet branch pipe and the air outlet branch pipe at the bottom; the second air inlet pipe is fixed on the main air inlet pipe at the top and sleeved on the top of the second pair of connecting pipes at the bottom; the electric valve is fixed on the second air inlet pipe; the second air outlet pipe is sleeved on the top of the second pair of connecting pipes at one end and extends out to the welding seat at the other end.

[0017] Furthermore, splicing plates are fixed at both ends of the semicircular rail, an annular groove is formed on the outer surface of the semicircular rail, and a stroke tooth assembly is provided on the outer surface of the semicircular rail.

[0018] Furthermore, the power component includes:

[0019] Two concave rods are provided, located on both sides of the welding seat; an adjusting motor is fixed on the welding seat; a threaded rod is rotatably mounted on the welding seat at its middle position, with its two ends threaded into the two concave rods respectively; a main gear is fixed on the adjusting motor; an auxiliary gear is fixed on the threaded rod and meshes with the main gear; a guide rod is fixed on the welding seat at its middle position, with its two ends slidably inserted into the two concave rods respectively; a connecting shaft is rotatably mounted at both ends of the concave rods; and a roller is fixed on the end of the connecting shaft away from the concave rods and located within an annular groove.

[0020] Furthermore, the power component also includes:

[0021] The power motor is fixed on the welding base; the power shaft is rotatably mounted on the enclosed cover; the power gear is fixed at both ends of the power shaft and meshes with the stroke gear set; the bevel gear pair has the input bevel gear fixed on the power motor and the output bevel gear fixed on the power shaft.

[0022] Furthermore, it also includes:

[0023] A baffle plate is fixed inside the functional slot; a displacement slot is formed on the baffle plate; an extension plate is fixed on the concave rod; and a lidar is fixed on the end of the extension plate away from the concave rod.

[0024] A threaded abutment is threadedly inserted into a semi-circular steel rail; an internal hex nut is fixed to the threaded abutment; and a washer is fixed to the end of the threaded abutment away from the internal hex nut.

[0025] Furthermore, it also includes:

[0026] The wiring hole is located on the sealed cover; one end of the electrode wire is inserted into the welding battery, and the other end is inserted into the welding head; the charging port is located on the welding battery.

[0027] The above-described solution of the present invention has at least the following beneficial effects:

[0028] The control panel of this invention adjusts the output current of the welding battery. The current is transmitted to the nitinol wire through the positive electrode connecting rod, the negative electrode connecting rod, and the metal connector, heating the nitinol wire. The shortening of the nitinol wire is precisely controlled by the magnitude of the current. The shortened nitinol wire drives the negative electrode connecting rod to retract into the protective sleeve, which in turn pushes the linkage plate. The linkage plate, on the one hand, drives the displacement plate to move along the travel slide frame through the docking plate, realizing fine left and right adjustments of the welding head; on the other hand, it drives the angle adjustment gear to rotate through the angle adjustment plate, and then adjusts the tilt angle of the welding head through the angle adjustment rod. After power is cut off, the return spring in the spring cylinder releases elastic potential energy, pushing the piston rod and the linkage plate to reset, causing the nitinol wire to return to its original length, and at the same time causing the displacement plate to return to the center. The position and angle adjustment components are simultaneously reset, and the welding head returns to its initial posture. Utilizing the current-controlled temperature-controlled expansion and contraction characteristics of the nickel-titanium wire, combined with the linear transmission of the displacement plate and the precise angle conversion of the angle adjustment gear, millimeter-level micro-adjustment of the welding head is achieved. This efficiently adapts to irregular welding gaps, avoiding welding defects. The nickel-titanium wire offers rapid response and direct transmission, eliminating the need for complex intermediate mechanisms, significantly reducing welding head adjustment time and improving work efficiency. The automatic reset function of the return spring ensures accurate welding head positioning after each adjustment, reducing human error. Furthermore, the entire process is centrally operated via the control panel, eliminating the need for manual disassembly and adjustment, reducing operational difficulty, and adapting to the welding needs of different types of metal pipes in municipal construction, balancing welding quality and construction convenience. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the installation structure of a metal pipe welding device for municipal construction provided in an embodiment of the present invention;

[0030] Figure 2 A metal pipe welding device for municipal construction is provided as an embodiment of the present invention. Figure 1 Enlarged view of point A;

[0031] Figure 3 This is a schematic diagram of the overall structure of a metal pipe welding device for municipal construction provided in an embodiment of the present invention;

[0032] Figure 4 A metal pipe welding device for municipal construction is provided as an embodiment of the present invention. Figure 3 Enlarged view of point B;

[0033] Figure 5 A schematic diagram of the welding battery of a metal pipe welding device for municipal construction provided in an embodiment of the present invention;

[0034] Figure 6 A metal pipe welding device for municipal construction is provided as an embodiment of the present invention. Figure 5 Enlarged view of point C;

[0035] Figure 7A schematic diagram of the structure of a shielding plate for a metal pipe welding device used in municipal construction, provided in an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of the structure of a nickel-titanium wire for a metal pipe welding device used in municipal construction, provided in an embodiment of the present invention;

[0037] Figure 9 A schematic diagram of the displacement plate structure of a metal pipe welding device for municipal construction provided in an embodiment of the present invention;

[0038] Figure 10 A metal pipe welding device for municipal construction is provided as an embodiment of the present invention. Figure 9 Enlarged view of point D;

[0039] Figure 11 A schematic diagram of the blower structure of a metal pipe welding device for municipal construction provided in an embodiment of the present invention;

[0040] Figure 12 A metal pipe welding device for municipal construction is provided as an embodiment of the present invention. Figure 11 Enlarged view of point E;

[0041] Figure 13 This is a schematic diagram of a semi-circular steel rail structure for a metal pipe welding device used in municipal construction, provided as an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] In the diagram: 1. Welding seat; 2. Semicircular rail; 201. Splicing plate; 202. Annular groove; 203. Stroke gear set; 3. Power component; 301. Concave rod; 302. Adjusting motor; 303. Threaded rod; 304. Main gear; 305. Auxiliary gear; 306. Guide rod; 307. Connecting shaft; 308. Roller; 309. Power motor; 3010. Power shaft; 3011. Power gear; 3012. Bevel gear pair; 4. Functional slot; 5. Stroke slide frame; 6. Displacement plate; 601. Angle adjustment slot; 7. Heat drive component; 701. Heat drive frame; 702. Protective sleeve; 703. Nickel-Titanium wire; 704. Metal joint; 705. Sealing cover; 706. Positive connecting rod; 707. Negative connecting rod; 708. Spring cylinder; 709. Piston rod; 7010 7011. Reset spring; 7012. Linkage plate; 7013. Connecting plate; 7014. Angle adjusting gear; 7015. Angle adjusting gear plate; 7016. Air inlet branch pipe; 7017. Air outlet branch pipe; 8. Heat sink; 801. Blower; 802. Main air inlet pipe; 803. First connecting pipe; 804. First air inlet branch pipe; 805. First air outlet pipe; 806. Second connecting pipe; 807. Second air inlet pipe; 808. Electric valve; 809. Second air outlet pipe; 9. Angle adjusting rod; 10. Welding head; 11. Enclosure; 12. Welding battery; 13. Control panel; 14. Baffle plate; 15. Displacement groove; 16. Extension plate; 17. LiDAR; 18. Threaded abutment rod; 19. Hex socket nut; 20. Washer; 21. Cable routing hole; 22. Electrode wire; 23. Charging port. Detailed Implementation

[0044] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0045] like Figures 1 to 13 As shown, an embodiment of the present invention provides a metal pipe welding device for municipal construction, comprising: a welding seat 1 and two semi-circular steel rails 2 disposed on both sides of the welding seat 1, and further comprising:

[0046] Power component 3, fixed on welding base 1; functional slot 4, formed on welding base 1; stroke slide frame 5, fixed inside functional slot 4; displacement plate 6, slidably set on stroke slide frame 5; heat drive component 7, fixed inside functional slot 4 and displacement plate 6; heat dissipation component 8, fixed on welding base 1; angle adjustment rod 9, one end rotatably inserted into displacement plate 6, the other end extending out of welding base 1; welding head 10, fixed on the end of angle adjustment rod 9 extending out of welding base 1; enclosure 11, fixed on welding base 1; welding battery 12, fixed on welding base 1; control panel 13, fixed on enclosure 11.

[0047] Angle adjustment slot 601 is formed within displacement plate 6; four heat drive frames 701 are provided, with two heat drive frames 701 forming a group, and two groups of heat drive frames 701 are fixed within functional slot 4 and angle adjustment slot 601 respectively; four protective sleeves 702 are provided, with all four protective sleeves 702 being equidistantly arranged on the same heat drive frame 701; a nickel-titanium wire 703 is located inside the protective sleeve 702, used for heating and shortening its length after being energized; a metal connector 704 is fixed to both ends of the nickel-titanium wire 703; a sealing cover 705 is fixed to both ends of the protective sleeve 702, with the end furthest from the protective sleeve 702 fixed to the heat drive frame 701; a positive electrode connecting rod 706 is set at one end on the metal connector 704, and the other end... A fixed plug is inserted into the closed cover 705; a negative electrode connecting rod 707, one end of which is set on the metal connector 704, and the other end slides out of the closed cover 705; a spring cylinder 708 is fixed on both sides of the same heat drive frame 701; a piston rod 709, the piston end of which is slidably inserted into the spring cylinder 708, and the non-piston end slides out of the heat drive frame 701; a return spring 7010, one end of which is fixed in the spring cylinder 708, and the other end of which is fixed on the piston end of the piston rod 709, is used to apply external force to the nickel-titanium wire 703 to restore its initial length; a linkage plate 7011 is fixedly sleeved on one end of the negative electrode connecting rod 707 that extends out of the closed cover 705, and fixed on one end of the piston rod 709 that extends out of the heat drive frame 701.

[0048] The semicircular rail 2 has splicing plates 201 fixed at both ends, an annular groove 202 and a travel tooth set 203 on its outer surface. It also includes: a baffle plate 14 fixed in the functional groove 4; a displacement groove 15 on the baffle plate 14; an extension plate 16 fixed on the concave rod 301; a laser radar 17 fixed on the end of the extension plate 16 away from the concave rod 301; a threaded abutment 18 threaded into the semicircular rail 2; an internal hexagonal nut 19 fixed to the threaded abutment 18; and a pad 20 fixed on the end of the threaded abutment 18 away from the internal hexagonal nut 19. Furthermore, it includes: a cable routing hole 21 on the enclosure 11; an electrode wire 22, one end of which is inserted into the welding battery 12 and the other end into the welding head 10; and a charging port 23 on the welding battery 12.

[0049] Specifically, the charging port 23 is used to charge the welding battery 12. The electrode wire 22 is connected to the welding battery 12, or it can be connected to an external power source to extend the working time. When the threaded abutment 18, the internal hexagonal nut 19 and the washer 20 are on the semi-circular steel rail 2 and have not yet been connected, the washer 20 is brought as close as possible to the semi-circular steel rail 2 to facilitate subsequent calculation of the number of turns and angles to which the threaded abutment 18, the internal hexagonal nut 19 and the washer 20 rotate.

[0050] In another preferred embodiment of the present invention, the heat drive component 7 further includes: a docking plate 7012, fixed on both sides of the displacement plate 6, with the side away from the displacement plate 6 fixed on the linkage plate 7011; an angle adjustment gear 7013, fixed on the angle adjustment rod 9; an angle adjustment toothed plate 7014, with its non-toothed end fixed on the linkage plate 7011 and its toothed end meshing with the angle adjustment gear 7013; and an air inlet branch pipe 7015 fixed at one end of the protective sleeve 702 and an air outlet branch pipe 7016 fixed at the other end of the protective sleeve 702.

[0051] In another preferred embodiment of the present invention, the heat sink 8 includes: a blower 801, fixed on the welding base 1; an air inlet main pipe 802, fixed on the blower 801; a first pair of connecting pipes 803, fixed at the bottom inside the air inlet branch pipe 7015 and the air outlet branch pipe 7016; a first air inlet branch pipe 804, fixed at the middle position on the air inlet main pipe 802, with both ends sleeved above the first pair of connecting pipes 803; and a first air outlet pipe 805, with one end sleeved above the first pair of connecting pipes 803 and the other end extending out of the welding base 1.

[0052] The heat sink 8 also includes: a second pair of connecting pipes 806, which is fixed at the bottom inside the air inlet branch pipe 7015 and the air outlet branch pipe 7016; a second air inlet pipe 807, which is fixed at the top on the main air inlet pipe 802 and sleeved at the bottom above the second pair of connecting pipes 806; an electric valve 808, which is fixed on the second air inlet pipe 807; and a second air outlet pipe 809, which is sleeved at one end above the second pair of connecting pipes 806 and extends out to the welding seat 1 at the other end.

[0053] Specifically, blower 801 provides air, and a filter plate for filtering air is installed inside the air inlet of blower 801.

[0054] In another preferred embodiment of the present invention, the power component 3 includes: two concave rods 301 located on both sides of the welding seat 1; an adjusting motor 302 fixed on the welding seat 1; a threaded rod 303 rotatably mounted on the welding seat 1 at its middle position, with its two ends threadedly inserted into the two concave rods 301 respectively; a main gear 304 fixed on the adjusting motor 302; an auxiliary gear 305 fixed on the threaded rod 303 and meshing with the main gear 304; a guide rod 306 fixed at its middle position on the welding seat 1, with its two ends slidably inserted into the two concave rods 301 respectively; a connecting shaft 307 rotatably mounted at both ends of the concave rods 301; and a roller 308 fixed on the end of the connecting shaft 307 away from the concave rods 301 and located within the annular groove 202.

[0055] The power component 3 also includes: a power motor 309, fixed on the welding seat 1; a power shaft 3010, rotatably mounted on the enclosure 11; a power gear 3011, fixed at both ends of the power shaft 3010 and meshing with the stroke gear set 203; and a bevel gear pair 3012, with the input bevel gear fixed on the power motor 309 and the output bevel gear fixed on the power shaft 3010.

[0056] This device is a welding machine specifically designed for butt welding of metal pipes. It is widely used in welding operations for metal pipe connections in municipal construction. This device meets the requirements for high-quality welding when butt-jointing metal pipes, while ensuring construction efficiency and significantly improving the safety and ease of operation.

[0057] Depending on the different models and sizes of metal pipes used in municipal construction, the corresponding model of semi-circular steel rail 2 can be replaced; the stroke gear 203 on different models of semi-circular steel rail 2 precisely meshes with the power gear 3011, and the annular groove 202 on the semi-circular steel rail 2 is adapted to the roller 308.

[0058] The splicing plate 201 should be installed perpendicular to the ground. Two semi-circular steel rails 2 are fixed to the splicing plate 201 with bolts to form a set of circular steel rails. The two sets of circular steel rails are respectively fitted onto the two mating metal pipes. The number of rotations and angle of the internal hexagonal nuts 19 are calculated by an external intelligent computer. The automatic internal hexagonal nut wrench rotates the internal hexagonal nuts 19 according to the set number of rotations and angle. When all internal hexagonal nuts 19 reach the set number of rotations and angle, the threaded rod 18 and the washer 20 contact the outer surface of the metal pipe, thereby ensuring that the circular steel rails are fixed to the metal pipes while the central axis of the circular steel rails and the metal pipes are aligned. The gap between the mating metal pipes forms the welding gap.

[0059] When the two sets of circular steel rails are about to be fixed to the metal pipe, the circular steel rails can still move on the pipe; insert the roller 308 into the annular groove 202, and the power gear 3011 meshes with the stroke gear set 203 to complete the assembly.

[0060] The control panel 13 is used to control and adjust the motor 302, the power motor 309, the electric valve 808, and the lidar 17. A wire connects the positive terminal of the welding battery 12 to the positive terminal of the positive connecting rod 706, and another wire connects the negative terminal of the welding battery 12 to the negative terminal of the welding battery 12. The control panel 13 adjusts the current from the welding battery 12 to the positive and negative connecting rods 706 and 707, thereby controlling the heating temperature of the nickel-titanium wire 703 after it is energized, and thus controlling the shortening of the distance of the nickel-titanium wire 703. The control panel 13 also adjusts the welding battery 12 to provide power to the electrode wire 22 and the welding head 10, so that the welding head 10 generates an electric arc after being energized, and works with the welding rod to complete the welding operation of the welding gap.

[0061] Working principle: When the power motor 309 is started, the power motor 309 drives the rotation of the bevel gear pair 3012. The rotation of the bevel gear pair 3012 drives the rotation of the power shaft 3010. The rotation of the power shaft 3010 drives the rotation of the power gear 3011. The power gear 3011 moves along the travel gear set 203 on the semi-circular steel rail 2. Then, the roller 308 is inserted into the annular groove 202 to form a stable triangular support. The welding seat 1 and the closed cover 11 can move stably around the circular steel rail, while driving the welding head 10 to move and weld the metal pipe.

[0062] Start the adjusting motor 302, which drives the main gear 304 to rotate. The rotation of the main gear 304 drives the rotation of the auxiliary gear 305. The rotation of the auxiliary gear 305 drives the rotation of the threaded rod 303. The rotation of the threaded rod 303 drives the two concave rods 301 to move in opposite directions, thereby adjusting the distance between the rollers 308 on the two concave rods 301 to adapt to different models of semi-circular steel rails 2.

[0063] When welding metal pipes, the lidar 17 is activated to detect the direction and size of the welding gap. When the welding gap is large or uneven, the welding head 10 is moved left and right and oscillated at an angle to ensure that the welding head 10 can cover the entire welding gap and fill the weld evenly, thereby avoiding the generation of welding defects.

[0064] When the welding head 10 moves left and right, the current of the welding battery 12 is adjusted via the control panel 13. The current energizes the positive electrode connecting rod 706 and the negative electrode connecting rod 707 in the functional slot 4, and is transmitted to the nitinol wire 703 through the metal connector 704, causing the nitinol wire 703 to heat up and shorten. The shortened nitinol wire 703 drives the negative electrode connecting rod 707 to retract into the protective sleeve 702, thereby pushing the linkage plate 7011 to move. The linkage plate 7011 drives the piston rod 709 to retract into the spring cylinder 708, compressing the return spring 7010. The linkage plate 7011 also drives the docking plate 7012 to move, thereby causing the displacement plate 6 to move towards the energized side. When not energized... The nitinol wire 703 is stretched, causing the piston rod 709 to extend outwards, and the return spring 7010 is stretched. After the power is cut off, the nitinol wire 703 will return to its original length through the return springs 7010 on both sides of the displacement plate 6, and the displacement plate 6 will also return to the center position. By controlling the power on and off of both sides of the nitinol wire 703, the displacement plate 6 can move to the left or right. The return spring 7010 helps to restore the original length of the nitinol wire 703, and the displacement plate 6 slides on the stroke slide frame 5 and returns to the center position. The left and right movement of the displacement plate 6 drives the movement of the welding head 10, so that the position of the welding head 10 can be adjusted adaptively according to the direction and size of the welding gap.

[0065] When the welding head 10 rotates, the current of the welding battery 12 is adjusted via the control panel 13. The current energizes the positive electrode connecting rod 706 and the negative electrode connecting rod 707 in the angle adjustment slot 601, and is transmitted to the nitinol wire 703 through the metal connector 704, causing the nitinol wire 703 to heat up and shorten. The shortened nitinol wire 703 drives the negative electrode connecting rod 707 to retract into the protective sleeve 702, thereby pushing the linkage plate 7011 to move. The linkage plate 7011 drives the piston rod 709 to move towards the spring cylinder 708. The retraction compresses the return spring 7010; the linkage plate 7011 also drives the angle adjustment gear plate 7014 to move, and the displacement of the angle adjustment gear plate 7014 drives the angle adjustment gear 7013 to rotate, which in turn drives the angle adjustment rod 9 to rotate, thereby adjusting the angle of the welding head 10; when the angle adjustment gear 7013 rotates, the unpowered angle adjustment gear plate 7014 will drive the nickel-titanium wire 703, the return spring 7010 and the linkage plate 7011 to stretch; after the power is cut off, the return spring 7010 will return the welding head 10 to its initial state.

[0066] When the blower 801 is started, it draws outside air into the main air intake pipe 802. The outside air needs to be filtered first. The air in the main air intake pipe 802 flows into the first air intake branch pipe 804, and then enters the first connecting pipe 803 and the air intake branch pipe 7015 in the functional slot 4. The air flows into the protective sleeve 702. After the air completes its flow in the protective sleeve 702, it flows out from the air outlet branch pipe 7016 and into the first air outlet pipe 805, and then is discharged from the first air outlet pipe 805. During the air flow process, the heated nickel-titanium wire 703 can be cooled down quickly.

[0067] When the electric valve 808 is opened, the air in the main air inlet pipe 802 is diverted to the second air inlet pipe 807, and then enters the air inlet branch pipe 7015 of the angle adjustment slot 601, thus flowing into the protective sleeve 702. After flowing in the protective sleeve 702, the air flows out from the outlet branch pipe 7016 and into the second outlet pipe 809, and then is discharged from the second outlet pipe 809. The air flow path can also quickly cool down the heated nickel-titanium wire 703.

[0068] Example 1:

[0069] During the welding process, the lidar 17 monitors the direction and size of the welding gap in real time. When an irregular section with a length of approximately 150mm and a maximum gap deviation of 0.8mm is detected at the pipe interface, the control panel 13 immediately activates the driver program of the thermal drive component 7. It first adjusts the output current of the welding battery 12 to energize the positive and negative connecting rods 706 and 707 in the functional slot 4. The current is then transmitted to the nickel-titanium wire 703 through the metal connector 704. Considering that the minimum retraction temperature of the nickel-titanium wire 703 is no less than 55℃, and that the higher the heating temperature, the shorter the retraction time, the current is set to rapidly heat the nickel-titanium wire 703 to [temperature value missing]. At 80℃, the retraction rate of the NiTiNoS 703 is about 1.8 times higher than at 55℃, and it only takes 0.3 seconds to complete a 2mm retraction. The shortened NiTiNoS 703 drives the negative electrode connecting rod 707 to retract into the protective sleeve 702, which in turn pushes the linkage plate 7011 to move. The linkage plate 7011 drives the piston rod 709 to retract into the spring cylinder 708 and compress the reset spring 7010. On the other hand, it drives the docking plate 7012 to push the displacement plate 6 to move quickly to the left or right along the stroke slide frame 5. The movement of the displacement plate 6 directly drives the welding head 10 to move synchronously to the left or right to adapt to the offset of the welding gap.

[0070] The control panel 13 synchronously adjusts the energization status of the nitinol wire 703 in the angle adjustment slot 601. By adjusting the output current of the welding battery 12, the nitinol wire 703 in the angle adjustment slot 601 is heated to 75°C, so that the nitinol wire 703 completes a 1.5mm retraction within 0.4 seconds. The retracted nitinol wire 703 drives the angle adjustment gear plate 7014 to move through the linkage plate 7011. The angle adjustment gear plate 7014 drives the angle adjustment gear 7013 to rotate 15°, which in turn drives the angle adjustment rod 9 to adjust the tilt angle of the welding head 10, ensuring that the angle between the welding head 10 and the irregular welding gap always maintains the optimal welding angle.

[0071] While the NiTiNOS 703 continues to heat up, the control panel 13 simultaneously activates the heat sink 8, introducing outside air after it has been filtered through the main air intake 802. A portion of this air enters the first connecting pipe 803 within the functional slot 4 through the first air intake branch pipe 804, and then flows through the air intake branch pipe 7015 into the corresponding protective sleeve 702 of the functional slot 4. The air flows rapidly within the protective sleeve 702, carrying away excess heat generated by the NiTiNOS 703 during operation, and then flows out through the air outlet branch pipe 7016 into the first air outlet pipe 805 for discharge. Simultaneously, the electric valve 808 is opened, allowing the air intake... Another portion of the air in the main air pipe 802 is diverted to the second air inlet pipe 807, and then enters the air inlet branch pipe 7015 of the angle adjustment slot 601 through the second air inlet pipe 807. It also flows into the protective sleeve 702 corresponding to the angle adjustment slot 601 to cool down the nickel-titanium wire 703 in the angle adjustment slot 601. Through the continuous air supply of the heat sink 8, the air velocity in the protective sleeve 702 is maintained at 8m / s, so that the temperature of the functional slot 4 and the nickel-titanium wire 703 in the angle adjustment slot 601 is stably maintained within the set working temperature ±3℃, avoiding the performance degradation of the nickel-titanium wire 703 due to excessive temperature.

[0072] When the welding head 10 completes the welding of the irregular section and needs to be reset, the control panel 13 immediately cuts off the power supply to the nitinol wire 703 in the function slot 4 and the angle adjustment slot 601. At this time, the blower 801 and the electric valve 808 of the heat sink 8 are still running. The filtered air continues to flow through the main air intake pipe 802 to the first air intake branch pipe 804 and the second air intake pipe 807 respectively, and then continuously enters the corresponding protective sleeve 702 through the air intake branch pipe 7015, quickly removing the residual heat of the nitinol wire 703 after the power is cut off, and realizing the nitinol wire 703 Rapid cooling occurs; the return spring 7010 inside the spring cylinder 708 releases elastic potential energy, pushing the piston rod 709 and the linkage plate 7011 to reset, causing the nickel-titanium wire 703 to return to its original length, the displacement plate 6 to return to the center position along the stroke slide frame 5, and the angle adjustment plate 7014 and the angle adjustment gear 7013 also reset synchronously, so that the welding head 10 returns to its initial posture; until the temperature of the nickel-titanium wire 703 drops below 50℃, the control panel 13 shuts off the blower 801 and the electric valve 808 to prevent the nickel-titanium wire 703 from stress deformation due to excessive cooling.

[0073] Throughout the operation, the NiTiNos 703 in the heat drive component 7 achieves rapid retraction through precise temperature control, driving components such as the linkage plate 7011 and the angle adjustment tooth plate 7014 to complete the rapid movement and angle adjustment of the welding head 10. Meanwhile, components such as the blower 801, main air inlet 802, first air inlet branch 804, and second air inlet 807 in the heat dissipation component 8 provide stable heat dissipation during the heating of the NiTiNos 703 and achieve rapid cooling after the NiTiNos 703 is powered off. The synergistic effect of both components ensures that the left and right movement response time of the welding head 10 is controlled within 0.5 seconds and the angle adjustment response time is controlled within 0.6 seconds, fully meeting the rapid adaptation requirements of irregular welding gaps. At the same time, it ensures that the NiTiNos 703 does not experience performance degradation during 1.5 hours of continuous operation, ultimately achieving the butt welding of metal pipes and significantly improving the welding efficiency and quality in municipal construction.

[0074] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A metal pipe welding device for municipal construction, comprising: The welding seat and two semi-circular steel rails are provided on both sides of the welding seat. The feature is that it further includes: The power unit is fixed to the welding base; the functional slot is formed on the welding base; the travel slide frame is fixed inside the functional slot; the displacement plate is slidably set on the travel slide frame; the heat drive unit is fixed inside the functional slot and the displacement plate; the heat dissipation unit is fixed to the welding base; the angle adjustment rod has one end rotatably inserted into the displacement plate and the other end extends out of the welding base; the welding head is fixed to the end of the angle adjustment rod that extends out of the welding base; the sealing cover is fixed to the welding base; the welding battery is fixed to the welding base; and the control panel is fixed to the sealing cover. Angle adjustment grooves are formed inside the displacement plate; Four heat drive frames are provided, with two frames forming a group. The two groups of heat drive frames are fixed within the functional slot and the angle adjustment slot, respectively. Four protective sleeves are provided, all equidistantly positioned on the same heat drive frame. A nitinol wire is located inside the protective sleeve and is used to heat and shorten its length after energization. A metal connector is fixed to both ends of the nitinol wire. A sealing cap is fixed to both ends of the protective sleeve, with the end furthest from the protective sleeve fixed to the heat drive frame. A positive electrode connecting rod has one end attached to the metal connector and the other end fixed to the insert. The components are: a negative electrode connecting rod with one end attached to a metal connector and the other end extending out of the closed cover; a spring sleeve fixed to both sides of the same heat drive frame; a piston rod with the piston end slidably inserted into the spring sleeve and the non-piston end extending out of the heat drive frame; a return spring with one end fixed inside the spring sleeve and the other end fixed to the piston end of the piston rod, used to apply external force to the nitinol wire to restore its initial length; and a linkage plate fixedly sleeved on the end of the negative electrode connecting rod extending out of the closed cover and fixed to the end of the piston rod extending out of the heat drive frame.

2. The metal pipe welding device for municipal construction according to claim 1, characterized in that, The heat-driving component also includes: The docking plate is fixed on both sides of the displacement plate, and the side away from the displacement plate is fixed on the linkage plate; the angle adjusting gear is fixed on the angle adjusting rod; the angle adjusting tooth plate has its non-tooth end fixed on the linkage plate, and its tooth end meshes with the angle adjusting gear.

3. The metal pipe welding device for municipal construction according to claim 1, characterized in that, An air inlet branch pipe is fixed to one end of the protective sleeve, and an air outlet branch pipe is fixed to the other end of the protective sleeve.

4. The metal pipe welding device for municipal construction according to claim 1, characterized in that, The heat sink includes: A blower is fixed on the welding base; an air inlet main pipe is fixed on the blower; a first pair of connecting pipes is fixed inside the air inlet branch pipe and the air outlet branch pipe at the bottom; a first air inlet branch pipe is fixed on the air inlet main pipe at the middle position, and both ends are sleeved on the top of the first pair of connecting pipes; a first air outlet pipe is sleeved on the top of the first pair of connecting pipes at one end, and extends out of the welding base at the other end.

5. A metal pipe welding device for municipal construction according to claim 4, characterized in that, The heat sink also includes: The second pair of connecting pipes is fixed inside the air inlet branch pipe and the air outlet branch pipe at the bottom; the second air inlet pipe is fixed on the main air inlet pipe at the top and sleeved on the top of the second pair of connecting pipes at the bottom; the electric valve is fixed on the second air inlet pipe; the second air outlet pipe is sleeved on the top of the second pair of connecting pipes at one end and extends out to the welding seat at the other end.

6. A metal pipe welding device for municipal construction according to claim 1, characterized in that, Both ends of the semicircular rail are fixed with splicing plates, the outer surface of the semicircular rail is provided with an annular groove, and the outer surface of the semicircular rail is provided with a stroke tooth assembly.

7. A metal pipe welding device for municipal construction according to claim 1, characterized in that, The power component includes: Two concave rods are provided, located on both sides of the welding seat; an adjusting motor is fixed on the welding seat; a threaded rod is rotatably mounted on the welding seat at its middle position, with its two ends threaded into the two concave rods respectively; a main gear is fixed on the adjusting motor; an auxiliary gear is fixed on the threaded rod and meshes with the main gear; a guide rod is fixed on the welding seat at its middle position, with its two ends slidably inserted into the two concave rods respectively; a connecting shaft is rotatably mounted at both ends of the concave rods; and a roller is fixed on the end of the connecting shaft away from the concave rods and located within an annular groove.

8. A metal pipe welding device for municipal construction according to claim 7, characterized in that, The power component also includes: The power motor is fixed on the welding base; the power shaft is rotatably mounted on the enclosed cover; the power gear is fixed at both ends of the power shaft and meshes with the stroke gear set; the bevel gear pair has the input bevel gear fixed on the power motor and the output bevel gear fixed on the power shaft.

9. A metal pipe welding device for municipal construction according to claim 1, characterized in that, Also includes: A baffle plate is fixed inside the functional slot; a displacement slot is formed on the baffle plate; an extension plate is fixed on the concave rod; and a lidar is fixed on the end of the extension plate away from the concave rod. A threaded abutment is threadedly inserted into a semi-circular steel rail; an internal hex nut is fixed to the threaded abutment; and a washer is fixed to the end of the threaded abutment away from the internal hex nut.

10. A metal pipe welding device for municipal construction according to claim 9, characterized in that, Also includes: The cable routing hole is located on the enclosed cover; The electrode wire is inserted into the welding battery at one end and into the welding head at the other end. The charging port is located on the soldered battery.

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