Prefabricated pipe pile splicing welding device and using method

Abstract

The invention discloses a prefabricated pipe pile splicing welding device and a using method, and relates to the technical field of pipe pile welding, in the welding device, a pile embracing mechanism comprises a first pile embracing hoop and a second pile embracing hoop, and the second pile embracing hoop is slidably connected with the first pile embracing hoop in the circumferential direction of the first pile embracing hoop; the driving mechanism is used for driving the second pile hoop to slide relative to the first pile hoop; the guiding mechanism comprises a first guiding hoop and a second guiding hoop, the first pile holding hoop is connected with the first guiding hoop through a first supporting rod, and the second pile holding hoop is connected with the second guiding hoop through a second supporting rod; the walking mechanism moves along the first guide hoop and the second guide hoop, and a welding gun is arranged on the walking mechanism. In the method, a mobile device carries a pile holding mechanism to get close to a prefabricated pipe pile; the driving mechanism drives the pile embracing mechanism and the guiding mechanism to embrace the prefabricated pipe pile. The walking mechanism carries the welding gun to move along the guiding mechanism, and the welding gun welds the position of the butt pile. The assembling and disassembling efficiency of the welding device and the pipe pile can be improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipe pile welding, and in particular to a prefabricated pipe pile connection welding device and a use method thereof. Background Art

[0002] A pile is a force-transmitting member that transfers all or part of the building's load to the foundation soil and has a certain stiffness and bending resistance.

[0003] According to the different production methods, piles are divided into precast piles and cast-in-place piles. Precast piles are precast in the factory and then transported to the construction site for installation, while cast-in-place piles are directly cast at the construction site. The advantages of precast piles include high quality and large-scale factory production, which is conducive to speeding up the construction progress.

[0004] According to the different cross-sectional shapes, precast piles are divided into pipe piles and square piles. According to the different materials, precast piles are divided into steel piles and concrete piles. The construction methods of precast piles include hammer pile driving, water jet pile driving, vibration pile driving, and static pile driving. Static pile driving is to use the deadweight and counterweight of the pile driving frame in uniform soft soil, and use steel wire ropes, pulleys and pressure beams to press the gravity of the entire pile driver against the top of the precast pile to overcome the friction between the precast pile and the soil when it sinks, forcing the precast pile to sink and press the precast pile into the soil section by section. Static pile driving has no vibration, no noise, and little impact on the surrounding environment, making it suitable for construction in cities.

[0005] When installing prefabricated pipe piles using the static pile pressure construction method, the upper and lower sections of the prefabricated pipe piles need to be connected by welding. The traditional welding method is manual welding, which has low welding efficiency and high labor intensity. In response to this, mechanical welding equipment has been developed.

[0006] For example, in the patent with the announcement number CN219358406U, a "welding device for reinforcing the welded joints of PHC pipe piles" is disclosed. In this patent, it includes a semicircular clamp and a welding gun. There are four semicircular clamps, and each two semicircular clamps are fixed on the vertical sides close to the welding point by bolts. Connecting plates are welded on the outer contours of the two semicircular clamps away from each other. The surfaces of the two connecting plates away from the PHC pipe piles are penetrated and fixedly connected with two limit rods, and the limit rods are provided with a support mechanism for installing the welding gun.

[0007] When assembling the welding device and the pipe pile, it is necessary to manually use bolts to install four semicircular clamps on the pipe pile in groups of two; when disassembling the welding device and the pipe pile, it is still necessary to manually remove the bolts and separate the semicircular clamps from the pipe pile, which reduces the disassembly and assembly efficiency and increases the labor intensity.

[0008] Therefore, how to improve the disassembly and assembly efficiency of the welding device and the pipe pile and reduce the labor intensity is a technical problem that needs to be solved at present. Summary of the invention

[0009] The present invention aims at the above-mentioned deficiencies in the prior art and provides a prefabricated pipe pile connection welding device and a use method. The present invention can improve the disassembly and assembly efficiency of the welding device and the pipe piles and reduce the labor intensity.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A prefabricated pipe pile connection welding device comprises a pile holding mechanism, a guiding mechanism, a walking mechanism and a welding gun, wherein the pile holding mechanism comprises a first pile holding hoop and a second pile holding hoop, wherein the second pile holding hoop is slidably connected with the first pile holding hoop along the circumferential direction of the first pile holding hoop, and the first pile holding hoop is provided with a driving mechanism, wherein the driving mechanism is used to drive the second pile holding hoop to slide relative to the first pile holding hoop;

[0012] The guiding mechanism comprises a first guiding hoop and a second guiding hoop, the first pile holding hoop is connected to the first guiding hoop through a first support rod, and the second pile holding hoop is connected to the second guiding hoop through a second support rod;

[0013] The traveling mechanism moves along the first guide hoop and the second guide hoop, and the welding gun is arranged on the traveling mechanism.

[0014] Furthermore, an outer side wall of the first pile holding hoop is provided with a mounting frame, and the mounting frame is connected to the mobile equipment.

[0015] Furthermore, the inner side wall of the first pile holding hoop is provided with a plurality of first wheel frames, on which a first guide wheel is rotatably connected; the inner side wall of the second pile holding hoop is provided with a plurality of second wheel frames, on which a second guide wheel is rotatably connected, and both the first guide wheel and the second guide wheel are in contact with the side wall of the prefabricated pipe pile.

[0016] Furthermore, the driving mechanism includes a motor seat, a driving motor, a driving gear, and a driven rack. The motor seat is arranged on the outer wall of the first pile holding hoop, the driving motor is arranged on the motor seat, the output shaft of the driving motor is provided with a driving gear, and the driven rack is arranged on the outer wall of the second pile holding hoop, and the driving gear is meshed with the driven rack.

[0017] Further, the arc angles of the first pile-holding hoop and the second pile-holding hoop are both greater than 180°, and the arc angles of the first guide hoop and the second guide hoop are both greater than 180°.

[0018] Furthermore, the walking mechanism includes a walking frame, fixed wheels, movable wheels, a walking motor, a sliding seat, and a telescopic structure;

[0019] The inner bottom wall of the walking frame is slidably connected to the bottom surface of the first guide hoop along the circumference of the first guide hoop, and the inner top wall of the walking frame is slidably connected to the top surface of the second guide hoop along the circumference of the second guide hoop;

[0020] The interior of the walking frame is provided with fixed wheels and movable wheels;

[0021] A walking motor is arranged at the bottom of the walking frame, an output shaft of the walking motor passes through the bottom of the walking frame upward, the output shaft of the walking motor is connected to the fixed wheel, and a slot is arranged at the upper end of the output shaft of the walking motor;

[0022] The top of the walking frame is slidably connected with a sliding seat, and a telescopic structure is provided on the top of the walking frame, and the telescopic structure is used to drive the sliding seat to slide;

[0023] A movable shaft is rotatably connected to the slide seat, a movable wheel is arranged on the movable shaft, and an insert block is arranged at the lower end of the movable shaft;

[0024] When the telescopic structure is shortened, the plug block is plugged into the slot, the fixed wheel is matched with the outer side wall of the first guide hoop, and the movable wheel is matched with the outer side wall of the second guide hoop.

[0025] Furthermore, the fixed wheel adopts a fixed gear, the movable wheel adopts a movable gear, the outer wall of the first guide hoop is provided with a fixed rack, the outer wall of the second guide hoop is provided with a movable rack, the fixed gear cooperates with the fixed rack, and the fixed rack and the movable rack both cooperate with the movable gear.

[0026] Furthermore, a linkage plate is provided on the side of the walking frame, a rotating seat is provided on the linkage plate, the upper end of the rotating seat is rotatably connected to a rotating arm, a hammer is provided at the upper end of the rotating arm, a cylinder is provided at the lower end of the rotating arm, and the rotating seat is connected to the lower part of the rotating arm through an elastic member, and the elastic member is used to pull the lower part of the rotating arm to swing downward, so that the cylinder maintains contact with the fixed rack and the movable rack.

[0027] Furthermore, the telescopic structure adopts a pneumatic cylinder, an oil cylinder or an electric push rod.

[0028] A method for using a prefabricated pipe pile connection welding device, based on the prefabricated pipe pile connection welding device, the method for using comprises the following steps:

[0029] S1, starting the mobile device, which carries the pile holding mechanism, the guiding mechanism, the walking mechanism, and the welding gun close to the upper and lower prefabricated pipe piles in a docking state;

[0030] S2, starting the driving mechanism, driving the second pile holding hoop to slide relative to the first pile holding hoop, until the second pile holding hoop and the first pile holding hoop embrace the prefabricated pipe pile, and closing the driving mechanism, at which time, the first guide hoop and the second guide hoop also embrace the prefabricated pipe pile;

[0031] S3, start the walking mechanism and the welding gun, the walking mechanism carries the welding gun and moves along the first guide hoop and the second guide hoop, the welding gun welds the connection positions of the upper and lower prefabricated pipe piles, and after the welding is completed, close the walking mechanism and the welding gun;

[0032] S4, start the driving mechanism, which drives the second pile holding hoop to slide in the opposite direction relative to the first pile holding hoop until the second pile holding hoop overlaps with the first pile holding hoop, and then close the driving mechanism. At this time, the first guide hoop and the second guide hoop also overlap, and then start the mobile device, which carries the hoop mechanism away from the prefabricated pipe pile.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. In the process of assembling the welding device with the prefabricated pipe pile, the driving mechanism can drive the second pile holding hoop in the pile holding mechanism to slide relative to the first pile holding hoop, so that the second pile holding hoop and the first pile holding hoop gradually surround the prefabricated pipe pile. At the same time, the guiding mechanism completes the encircling action together. After the encirclement is completed, the driving mechanism can be shut down. In the process of assembling the welding device with the prefabricated pipe pile, there is no need to use fasteners such as screws and bolts, and there is no need for manual assembly, which is conducive to improving the assembly efficiency of the welding device and the prefabricated pipe pile and reducing the labor intensity.

[0035] 2. When releasing the assembled state of the welding device and the prefabricated pipe pile, the driving mechanism can drive the second pile holding hoop in the pile holding mechanism to slide in the opposite direction relative to the first pile holding hoop, so that the second pile holding hoop and the first pile holding hoop release the embrace of the prefabricated pipe pile. At the same time, the guiding mechanism also releases the embrace state. In this process, there is no need to disassemble fasteners such as screws and bolts, and no manual disassembly is required, which is conducive to improving the disassembly efficiency and reducing the labor intensity.

[0036] 3. When the first pile holding hoop and the second pile holding hoop surround the prefabricated pipe pile, the first guide wheel and the second guide wheel are both in contact with the side wall of the prefabricated pipe pile, so that the center of the ring structure formed by the first pile holding hoop and the second pile holding hoop coincides with the center of the cross-section of the prefabricated pipe pile. In subsequent welding, the welding distance can be kept consistent, which is beneficial to improving the welding quality.

[0037] 4. By making the arc angle of the first pile holding hoop and the arc angle of the second pile holding hoop greater than 180°, when the first pile holding hoop and the second pile holding hoop surround the prefabricated pipe pile, the end of the first pile holding hoop and the end of the second pile holding hoop can overlap each other, thereby improving the stability of the overall structure of the pile holding mechanism.

[0038] 5. By making the arc angle of the first guide hoop and the arc angle of the second guide hoop greater than 180°, when the first guide hoop and the second guide hoop surround the prefabricated pipe pile, the ends of the first guide hoop and the second guide hoop can also overlap each other, which is beneficial to improving the stability of the overall structure of the guide mechanism.

[0039] 6. In the walking mechanism, the setting of the telescopic structure can adjust the position of the slide, so that the position of the movable shaft and the movable wheel on the slide can also be adjusted, so that the plug at the lower end of the movable shaft can be driven to enter and exit the slot on the output shaft of the walking motor. When the plug at the lower end of the movable shaft is inserted into the slot on the output shaft of the walking motor, the walking motor can drive the fixed wheel and the movable wheel to rotate together. At this time, the friction between the fixed wheel and the outer wall of the first guide hoop and the friction between the movable wheel and the outer wall of the second guide hoop can be used to drive the walking mechanism as a whole to walk along the guide mechanism.

[0040] 7. When the plug is withdrawn from the slot, the movable wheel leaves the outer wall of the second guide hoop. At this time, the movable wheel will not hinder the guiding mechanism and the hoop mechanism from encircling and embracing the prefabricated pipe pile, and the movable wheel will not hinder the guiding mechanism and the hoop mechanism from releasing the encircling and embracing action, thereby avoiding interference between the walking mechanism and the guiding mechanism and the hoop mechanism.

[0041] 8. After the plug is out of the slot, when the travel motor is not started, the fixed wheel remains stationary and can maintain contact with the outer wall of the first guide hoop. The friction between the fixed wheel and the outer wall of the first guide hoop can be used to keep the travel mechanism stationary, so that the welding gun on the travel mechanism can be inspected in a fixed position, which is convenient for inspection and maintenance.

[0042] 9. By adopting fixed gears, movable gears, fixed racks, and welding racks, the meshing of the fixed gears and the fixed racks, and the meshing of the movable gears and the movable racks can be used to drive the walking mechanism to move along the first guide hoop and the second guide hoop. By utilizing the meshing between the teeth, when driving the walking mechanism to move, the risk of slipping can be reduced, ensuring that the walking structure can carry the welding gun and move reliably and effectively, avoiding the welding gun from being stranded at a certain position, which is beneficial to ensuring the welding quality and improving the reliability of the welding operation.

[0043] 10. By setting up a linkage plate, a rotating seat, a rotating arm, a hammer, a cylinder and an elastic part, the driving force of the traveling frame, the tooth shape of the fixed rack, the tooth shape of the movable rack and the elastic force of the elastic part can be utilized to drive the rotating arm to swing back and forth, and the rotating arm drives the hammer to strike the flux coating at the weld back and forth, thus realizing mechanical cleaning operation. There is no need for workers to manually clean the flux coating, which is beneficial to reducing labor intensity and improving the efficiency of flux coating cleaning.

[0044] 11. Because the linkage plate moves with the traveling frame at the rear of the traveling frame, the welding gun on the traveling frame performs welding operations to form a weld at the joint of the two prefabricated pipe piles, and the hammer on the linkage plate strikes the coating at the weld. This process realizes the linkage between welding operations and coating cleaning operations, which is conducive to further improving the efficiency of coating cleaning.

[0045] 12. Usually, in multi-layer welding, after welding one layer of weld, the coating needs to be knocked off before welding the next layer of weld. After knocking off the coating, the new weld layer is ensured to be seamlessly combined with the previous layer, which is beneficial to improving the welding quality. The present invention can clean the coating while welding, so that the next layer of welding can be carried out more quickly, which can improve the efficiency of multi-layer welding operations.

[0046] 13. The coating cleaning operation does not require the use of other power sources, which is conducive to saving energy. In addition, the mechanism structure formed by the combination of the linkage plate, the rotating seat, the rotating arm, the hammer body, the cylinder and the elastic member is simple and easy to assemble, which is conducive to improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a stereogram of the assembly of the traveling mechanism and welding gun;

[0048] Figure 2 This is the top view of the assembly of the traveling mechanism and the welding gun;

[0049] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0050] Figure 4 for Figure 2 Sectional view at the middle BB;

[0051] Figure 5 It is a three-dimensional assembly for the pile holding mechanism and the guiding mechanism. Figure 1 ;

[0052] Figure 6 It is a three-dimensional assembly for the pile holding mechanism and the guiding mechanism. Figure 2 ;

[0053] Figure 7 It is a three-dimensional assembly for the pile holding mechanism and the guiding mechanism. Figure 3 ;

[0054] Figure 8 This is the assembly front view of the pile holding mechanism and the guiding mechanism;

[0055] Fig. 9 It is a top view of the assembly of the pile holding mechanism and the guiding mechanism;

[0056] Fig.10 A three-dimensional prefabricated pipe pile welding device Figure 1 ;

[0057] Fig.11 A three-dimensional prefabricated pipe pile welding device Figure 2 ;

[0058] Fig.12 A three-dimensional diagram of the use status of a prefabricated pipe pile connection welding device Figure 1;

[0059] Fig.13 A three-dimensional diagram of the use status of a prefabricated pipe pile connection welding device Figure 2 ;

[0060] Fig.14 A three-dimensional diagram of the use status of a prefabricated pipe pile connection welding device Figure 3 ;

[0061] Fig.15 A top view of a prefabricated pipe pile connection welding device in use;

[0062] Fig.16 It is a disassembled stereoscopic diagram of the first guide hoop, the second guide hoop, the first pile holding hoop, and the second pile holding hoop.

[0063] Description of reference numerals:

[0064] DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] Embodiment 1:

[0067] A prefabricated pipe pile connection welding device comprises a pile holding mechanism, a driving mechanism, a guiding mechanism, a traveling mechanism and a welding gun 5.

[0068] See also Figures 5 to 15 The pile holding mechanism includes a first pile holding hoop 11 and a second pile holding hoop 12. The first pile holding hoop 11 and the second pile holding hoop 12 are both arc-shaped structures. A pile holding dovetail groove 111 is provided on the top surface of the first pile holding hoop 11, and the second pile holding hoop 12 slides and cooperates with the pile holding dovetail groove 111 along the circumference of the first pile holding hoop 11.

[0069] See also Figures 5 to 15 The outer wall of the first pile holding hoop 11 is fixedly mounted with a mounting frame 112, and the mounting frame 112 is used to be mounted on a mobile device. The mobile device can be a mobile vehicle, for example, a forklift. The forklift drives the pile holding mechanism to move together through the mounting frame 112, so that the pile holding mechanism can be close to or away from the prefabricated pipe pile 6.

[0070] See also Figures 5 to 15The driving mechanism includes a motor seat 21, a driving motor 22, a driving gear 23, and a driven rack 24. The motor seat 21 is fixedly mounted on the outer wall of the first pile holding hoop 11, and the driving motor 22 is fixedly mounted on the motor seat 21. The driving motor 22 can be a servo motor, and the driving gear 23 is fixedly mounted on the output shaft of the driving motor 22. The driven rack 24 is arranged on the outer wall of the second pile holding hoop 12, and the driven gear and the second pile holding hoop 12 are an integrated structure. The driving gear 23 meshes with the driven rack 24.

[0071] The principle of the driving mechanism driving the pile-holding mechanism to change its action is as follows:

[0072] (1) When the driving motor 22 drives the driving gear 23 to rotate forward, the driven rack 24 meshing with the driving gear 23 carries the second pile holding hoop 12 to slide relative to the first pile holding hoop 11, so that the second pile holding hoop 12 and the first pile holding hoop 11 are gradually closed together. The first pile holding hoop 11 and the second pile holding hoop 12 in the closed state can be used to surround the prefabricated pipe pile 6.

[0073] (2) When the driving motor 22 drives the driving gear 23 to reverse, the driven rack 24 meshing with the driving gear 23 carries the second pile holding hoop 12 to slide in the opposite direction relative to the first pile holding hoop 11, so that the second pile holding hoop 12 gradually overlaps with the first pile holding hoop 11 in a top view. The first pile holding hoop 11 and the second pile holding hoop 12 in the overlapped state no longer surround the prefabricated pipe pile 6, allowing the pile holding mechanism to leave the prefabricated pipe pile 6.

[0074] For further information, see Fig.16 , the arc angle a1 of the first pile holding hoop 11 and the arc angle a2 of the second pile holding hoop 12 are both greater than 180°. With such an arrangement, when the first pile holding hoop 11 and the second pile holding hoop 12 surround the prefabricated pipe pile 6, the end of the first pile holding hoop 11 and the end of the second pile holding hoop 12 can overlap each other, thereby improving the stability of the overall structure of the pile holding mechanism.

[0075] For further information, see Figures 5 to 9 The inner wall of the first pile holding hoop 11 is fixedly mounted with three first wheel frames 113, and the first wheel frames 113 are rotatably connected with the first guide wheels 1131. The inner wall of the second pile holding hoop 12 is fixedly mounted with three second wheel frames 121, and the second wheel frames 121 are rotatably connected with the second guide wheels 1211. When the first pile holding hoop 11 and the second pile holding hoop 12 surround the prefabricated pipe pile 6, the first guide wheels 1131 and the second guide wheels 1211 are both in contact with the side walls of the prefabricated pipe pile 6, so that the center of the annular structure formed by the first pile holding hoop 11 and the second pile holding hoop 12 coincides with the center of the cross-section of the prefabricated pipe pile 6. In subsequent welding, the welding distance can be kept consistent, which is conducive to improving the welding quality.

[0076] See also Figures 5 to 15The guide mechanism is located above the pile holding mechanism. The guide mechanism includes a first guide hoop 31 and a second guide hoop 32. The first guide hoop 31 and the second guide hoop 32 are both arc-shaped structures. A guide dovetail groove 311 is provided on the top surface of the first guide hoop 31, and the second guide hoop 32 slides with the guide dovetail groove 311 along the circumference of the first guide hoop 31.

[0077] See also Figures 5 to 9 A first support rod 114 is welded and fixed to the outer wall of the first pile holding hoop 11, and the upper end of the first support rod 114 is welded and fixed to the bottom surface of the first guide hoop 31. A second support rod 122 is welded and fixed to the inner wall of the second pile holding hoop 12, and the upper end of the second support rod 122 is welded and fixed to the inner wall of the second guide hoop 32.

[0078] The principle of the guiding mechanism changing its action with the pile-holding mechanism is as follows:

[0079] (1) When the first pile holding hoop 11 and the second pile holding hoop 12 gradually surround and embrace the prefabricated pipe pile 6, the first pile holding hoop 11 moves with the first guide hoop 31 through the first support rod 114, and the second pile holding hoop 12 moves with the second guide hoop 32 through the second support rod 122, so that the first guide hoop 31 and the second guide hoop 32 also gradually surround and embrace the prefabricated pipe pile 6.

[0080] (2) When the first pile holding hoop 11 and the second pile holding hoop 12 gradually overlap so as to leave the prefabricated pipe pile 6, the first pile holding hoop 11 moves together with the first guide hoop 31 through the first support rod 114, and the second pile holding hoop 12 moves together with the second guide hoop 32 through the second support rod 122, so that the first guide hoop 31 and the second guide hoop 32 also gradually overlap, and at this time, the guide mechanism is allowed to leave the prefabricated pipe pile 6.

[0081] For further information, see Fig.16 , the arc angle b1 of the first guide hoop 31 and the arc angle b2 of the second guide hoop 32 are both greater than 180°. In this way, when the first guide hoop 31 and the second guide hoop 32 surround the prefabricated pipe pile 6, the ends of the first guide hoop 31 and the second guide hoop 32 can also overlap each other, which is conducive to improving the stability of the overall structure of the guide mechanism.

[0082] The walking mechanism is used to move along the first guide hoop 31 and the second guide hoop 32. Figures 1 to 3 The walking mechanism includes a walking frame 41, fixed wheels, movable wheels, a walking motor 44, a slide seat 45, and a telescopic structure.

[0083] See also Figure 6 The bottom surface of the first guide hoop 31 is provided with a first slide rail 312, and the first slide rail 312 and the first guide hoop 31 are an integral structure. Figure 5The top surface of the second guide hoop 32 is provided with a second slide rail 321, and the second slide rail 321 and the second guide hoop 32 are an integral structure. Figure 3 The inner bottom wall of the traveling frame 41 is provided with a first dovetail groove 418, and the inner top wall of the traveling frame 41 is provided with a second dovetail groove 419. Fig.12 The first dovetail groove 418 is slidably connected to the first slide rail 312 , and the second dovetail groove 419 is slidably connected to the second slide rail 321 .

[0084] See also Figure 1 A welding gun 5 is installed on the traveling frame 41 in the traveling mechanism. When the traveling mechanism moves along the first guide hoop 31 and the second guide hoop 32, the welding gun 5 moves around the connecting pile positions of the upper and lower prefabricated pipe piles 6. After the welding gun 5 is started, the welding gun 5 can perform welding operations on the connecting pile positions.

[0085] See also Figure 1 and Figure 3 The fixed wheel and the movable wheel are both located inside the traveling frame 41, and the movable wheel is located above the fixed wheel.

[0086] See also Figure 3 A travel motor 44 is fixedly mounted at the bottom of the travel frame 41, and the travel motor 44 may also be a servo motor. A through hole is provided at the bottom of the travel frame 41, and the output shaft of the travel motor 44 passes through the through hole upward, and the output shaft of the travel motor 44 rotates with the through hole. A fixed wheel is fixedly mounted on the output shaft of the travel motor 44, and the fixed wheel is used to contact the outer side wall of the first guide hoop 31. A slot 441 is provided at the upper end of the output shaft of the travel motor 44.

[0087] See also Figure 3 , a sliding hole 411 is provided on the top of the traveling frame 41, and the sliding seat 45 is slidably matched with the sliding hole 411. A telescopic structure is fixedly installed on the top of the traveling frame 41, and the telescopic structure adopts a cylinder 46 or an oil cylinder or an electric push rod. In this embodiment, the telescopic structure adopts a cylinder 46, and the piston rod of the cylinder 46 is fixedly installed with the sliding seat 45. When the piston rod of the cylinder 46 is extended and retracted, the sliding seat 45 can be driven to slide in the sliding hole 411. A movable shaft 451 is rotatably connected to the sliding seat 45, and a movable wheel is fixedly installed on the movable shaft 451. An insert block 4511 is fixedly installed at the lower end of the movable shaft 451.

[0088] The working principle of the walking mechanism is as follows:

[0089] (1) When the piston rod of the cylinder 46 is extended, the piston rod of the cylinder 46 pushes the slide 45 to move away from the prefabricated pipe pile 6, and the slide 45 carries the movable shaft 451 and the movable wheel to move together, so that the plug block 4511 at the lower end of the movable shaft 451 exits the slot 441, and the movable wheel leaves the outer side wall of the second guide hoop 32. During the process of extending the piston rod of the cylinder 46, the position of the fixed wheel does not change, and the fixed wheel can contact the outer side wall of the first guide hoop 31.

[0090] When the guiding mechanism performs the enclosing and embracing action on the prefabricated pipe pile 6 , the first guiding hoop 31 in the guiding mechanism remains stationary, and the second guiding hoop 32 in the guiding mechanism slides relative to the first guiding hoop 31 .

[0091] Because the fixed wheel contacts the outer side wall of the first guide hoop 31 and the first guide hoop 31 is stationary, the friction resistance between the fixed wheel and the outer side wall of the first guide hoop 31 can be used to keep the fixed wheel in place, thereby keeping the position of the traveling mechanism in place.

[0092] Because the movable wheel leaves the outer side wall of the second guide hoop 32, the movable wheel will not hinder the movement of the second guide hoop 32. When the walking mechanism is stationary, the second slide rail 321 on the top surface of the second guide hoop 32 slides relative to the second dovetail groove 419.

[0093] In summary, when the insert block 4511 and the slot 441 are not plugged in, the walking mechanism will not hinder the enclosing and embracing action of the guiding mechanism, and the overall position of the walking mechanism remains stationary.

[0094] (2) When the piston rod of the cylinder 46 retracts, the piston rod of the cylinder 46 pulls the slide 45 to move toward the prefabricated pipe pile 6, and the slide 45 drives the movable shaft 451 and the movable wheel to move together, and the insert block 4511 at the lower end of the movable shaft 451 is inserted into the slot 441, and the movable wheel can contact the outer side wall of the second guide hoop 32. During the process of the piston rod of the cylinder 46 retracting, the fixed wheel can still keep in contact with the outer side wall of the first guide hoop 31.

[0095] After the first guide hoop 31 and the second guide hoop 32 in the guide mechanism complete the action of enclosing and embracing the prefabricated pipe pile 6, the travel motor 44 is started. Because the plug block 4511 is plugged into the slot 441, the output shaft of the travel motor 44 drives the movable shaft 451 to rotate together, so that the fixed wheel and the movable wheel rotate together.

[0096] When the walking mechanism is located at a non-end position of the first guide hoop 31, only the fixed wheel is in contact with the outer wall of the first guide hoop 31, and the friction between the fixed wheel and the outer wall of the first guide hoop 31 can be used to drive the fixed wheel to move around the outer wall of the first guide hoop 31, and then the walking mechanism as a whole can be driven to move along the first guide hoop 31; and at this time, the sliding cooperation between the first dovetail groove 418 and the first slide rail 312 can allow the walking frame 41 to maintain a constant height.

[0097] When the traveling mechanism is located at the overlapping position of the end of the first guide hoop 31 and the end of the second guide hoop 32, the fixed wheel contacts the outer wall of the first guide hoop 31, and the movable wheel contacts the outer wall of the second guide hoop 32. The friction between the fixed wheel and the outer wall of the first guide hoop 31, and the friction between the movable wheel and the outer wall of the second guide hoop 32, can drive the fixed wheel and the movable wheel to move around the overlapping portion of the first guide hoop 31 and the second guide hoop 32, and then drive the traveling mechanism to move along the overlapping portion of the first guide hoop 31 and the second guide hoop 32. In addition, at this time, the sliding cooperation between the first dovetail groove 418 and the first slide rail 312, and the sliding cooperation between the second dovetail groove 419 and the second slide rail 321 can keep the height of the traveling frame 41 unchanged.

[0098] When the walking mechanism is located at a non-end position of the second guide hoop 32, only the movable wheel is in contact with the outer wall of the second guide hoop 32. The friction between the movable wheel and the outer wall of the second guide hoop 32 can drive the movable wheel to move around the outer wall of the second guide hoop 32, and then the walking mechanism as a whole can be driven to move along the second guide hoop 32; and at this time, the sliding cooperation of the second dovetail groove 419 and the second slide rail 321 can keep the height of the walking frame 41 unchanged.

[0099] In summary, when the plug block 4511 is plugged into the slot 441, the walking mechanism can move along the guide mechanism around the prefabricated pipe pile 6, the height of the walking mechanism remains unchanged, and the height of the welding gun 5 installed on the walking mechanism remains unchanged, which can keep the welding height stable.

[0100] Embodiment 2:

[0101] A method for using a prefabricated pipe pile connection welding device, based on a prefabricated pipe pile connection welding device according to embodiment 1, comprises the following steps:

[0102] S1. Start the mobile device to approach the upper and lower prefabricated pipe piles 6 in the docking state. The mobile device drives the pile holding mechanism, the pile holding mechanism drives the guiding mechanism, the guiding mechanism drives the walking mechanism, and the walking mechanism drives the welding gun 5 to approach the upper and lower prefabricated pipe piles 6 in the docking state.

[0103] When the first guide wheel 1131 of the inner side wall of the first pile holding hoop 11 in the pile holding mechanism abuts against the outer side wall of the prefabricated pipe pile 6, it means that the movement is in place, and the moving equipment is shut down.

[0104] S2, start the driving mechanism, and the driving mechanism drives the second pile holding hoop 12 in the pile holding mechanism to slide relative to the first pile holding hoop 11. Because the first pile holding hoop 11 is connected to the first guide hoop 31 through the first support rod 114, and the second pile holding hoop 12 is connected to the second guide hoop 32 through the second support rod 122, the second guide hoop 32 in the guide mechanism slides relative to the first guide hoop 31. Because the plug block 4511 in the walking mechanism is not plugged into the slot 441, the walking mechanism maintains the current position and does not hinder the sliding action of the second guide hoop 32.

[0105] When the second pile-holding hoop 12 and the first pile-holding hoop 11 embrace the prefabricated pipe pile 6, the first guide hoop 31 and the second guide hoop 32 also embrace the prefabricated pipe pile 6, and the driving mechanism is closed.

[0106] S3, first, the piston rod of the cylinder 46 in the running mechanism is retracted, and the plug block 4511 and the slot 441 are gradually plugged in. After the plug block 4511 and the slot 441 are completely plugged in, the cylinder 46 is closed.

[0107] Then, the travel motor 44 and the welding gun 5 in the travel mechanism are started, and the travel mechanism carries the welding gun 5 to move along the first guide hoop 31 and the second guide hoop 32, and the welding gun 5 performs welding operation on the connection positions of the upper and lower prefabricated pipe piles 6. After welding is completed, the travel motor 44 and the welding gun 5 are turned off.

[0108] Finally, the piston rod of the cylinder 46 in the starting walking mechanism is extended, and the insert block 4511 gradually withdraws from the slot 441. After the insert block 4511 withdraws from the slot 441, the cylinder 46 is closed.

[0109] S4, starting the driving mechanism, which drives the second pile holding hoop 12 to slide in the opposite direction relative to the first pile holding hoop 11, until the second pile holding hoop 12 and the first pile holding hoop 11 overlap, and closing the driving mechanism, at which time, the first guide hoop 31 and the second guide hoop 32 also overlap.

[0110] Then, the mobile device is started to leave the prefabricated pipe pile 6, the mobile device drives the pile holding mechanism, the pile holding mechanism drives the guiding mechanism, the guiding mechanism drives the walking mechanism, and the walking mechanism drives the welding gun 5, and they leave the prefabricated pipe pile 6 together.

[0111] Through the above-mentioned use method of this embodiment 2, it can be known that this embodiment 2 has the following effects:

[0112] First, when assembling the welding device with the prefabricated pipe pile 6, the driving mechanism can drive the second pile holding hoop 12 in the pile holding mechanism to slide relative to the first pile holding hoop 11, so that the second pile holding hoop 12 and the first pile holding hoop 11 gradually surround the prefabricated pipe pile 6. At the same time, the guiding mechanism completes the encircling action together. After the encirclement is completed, the driving mechanism can be shut down. In the process of assembling the welding device with the prefabricated pipe pile 6, there is no need to use fasteners such as screws and bolts, and there is no need for manual assembly, which is conducive to improving the assembly efficiency of the welding device and the prefabricated pipe pile 6 and reducing the labor intensity.

[0113] Second, when releasing the assembled state of the welding device and the prefabricated pipe pile 6, the driving mechanism can drive the second pile holding hoop 12 in the pile holding mechanism to slide in the opposite direction relative to the first pile holding hoop 11, so that the second pile holding hoop 12 and the first pile holding hoop 11 release the embrace of the prefabricated pipe pile 6. At the same time, the guiding mechanism releases the embrace state together. In this process, there is no need to disassemble fasteners such as screws and bolts, and no manual disassembly is required, which is conducive to improving the disassembly efficiency and reducing the labor intensity.

[0114] Third, in the walking mechanism, the setting of the telescopic structure can adjust the position of the slide 45, so that the position of the movable shaft 451 and the movable wheel on the slide 45 can also be adjusted, thereby driving the insert block 4511 at the lower end of the movable shaft 451 to enter and exit the slot 441 on the output shaft of the walking motor 44.

[0115] When the plug block 4511 at the lower end of the movable shaft 451 is inserted into the slot 441 on the output shaft of the walking motor 44, the walking motor 44 can drive the fixed wheel and the movable wheel to rotate together. At this time, the friction between the fixed wheel and the outer wall of the first guide hoop 31 and the friction between the movable wheel and the outer wall of the second guide hoop 32 can be used to drive the walking mechanism as a whole to move along the guide mechanism.

[0116] When the plug block 4511 exits the slot 441, the movable wheel leaves the outer wall of the second guide hoop 32. At this time, the movable wheel will not hinder the guiding mechanism and the hoop mechanism from encircling and embracing the prefabricated pipe pile 6, and the movable wheel will not hinder the guiding mechanism and the hoop mechanism from releasing the encirclement and embracing action, thereby avoiding interference between the walking mechanism and the guiding mechanism and the hoop mechanism.

[0117] After the insert block 4511 exits the slot 441 and the travel motor 44 is not started, the fixed wheel remains stationary and can maintain contact with the outer wall of the first guide hoop 31. The friction between the fixed wheel and the outer wall of the first guide hoop 31 can be used to keep the travel mechanism stationary, so that the welding gun 5 on the travel mechanism can be inspected in a fixed position, which is convenient for inspection and maintenance.

[0118] Embodiment 3:

[0119] Based on Example 1, this Example 3 further improves the walking mechanism:

[0120] See also Figures 5 to 9 The outer wall of the first guide hoop 31 is provided with a fixed rack 313, and the fixed rack 313 is an integral structure with the first guide hoop 31. The outer wall of the second guide hoop 32 is provided with a movable rack 322, and the movable rack 322 is an integral structure with the second guide hoop 32.

[0121] See also Figure 1 and Fig.14 The fixed wheel adopts a fixed gear 42, the thickness of which is less than that of the fixed rack 313, and the fixed gear 42 can only be used to mesh with the fixed rack 313. The movable wheel adopts a movable gear 43, the thickness of which is greater than that of the movable rack 322, and the movable gear 43 can not only mesh with the movable rack 322, but also mesh with part of the fixed rack 313.

[0122] The working principle of the walking mechanism in this embodiment 3 is as follows:

[0123] (1) When the piston rod of the cylinder 46 is extended, the piston rod of the cylinder 46 pushes the slide 45 to move away from the prefabricated pipe pile 6, and the slide 45 moves with the movable shaft 451 and the movable gear 43, so that the plug 4511 at the lower end of the movable shaft 451 exits the slot 441, and the movable gear 43 leaves the movable rack 322 located on the outer wall of the second guide hoop 32. During the process of extending the piston rod of the cylinder 46, the fixed gear 42 remains in place, and the fixed gear 42 can mesh with the fixed rack 313 on the outer wall of the first guide hoop 31.

[0124] When the plug block 4511 is not plugged into the slot 441 , the guide mechanism can enclose and embrace the prefabricated pipe pile 6 , the first guide hoop 31 in the guide mechanism remains stationary, and the second guide hoop 32 in the guide mechanism slides relative to the first guide hoop 31 .

[0125] Because the fixed gear 42 is meshed with the fixed rack 313 on the outer wall of the first guide hoop 31, and the first guide hoop 31 is stationary, the meshing resistance between the fixed gear 42 and the fixed rack 313 can be used to keep the fixed gear 42 in place, and then the position of the walking mechanism can be kept in place.

[0126] Because the movable gear 43 leaves the movable rack 322 on the outer side wall of the second guide hoop 32, the movable gear 43 does not hinder the movement of the second guide hoop 32. When the walking mechanism is stationary, the second slide rail 321 on the top surface of the second guide hoop 32 slides relative to the second dovetail groove 419 on the inner top wall of the walking frame 41.

[0127] In summary, when the insert block 4511 and the slot 441 are not plugged in, the walking mechanism will not hinder the enclosing and embracing action of the guiding mechanism, and the overall position of the walking mechanism remains stationary.

[0128] (2) When the piston rod of the cylinder 46 retracts, the piston rod of the cylinder 46 pulls the slide 45 to move toward the prefabricated pipe pile 6, and the slide 45 drives the movable shaft 451 and the movable gear 43 to move together, and the insert block 4511 at the lower end of the movable shaft 451 is inserted into the slot 441, and the movable gear 43 can mesh with the movable rack 322 on the outer wall of the second guide hoop 32. During the process of the piston rod of the cylinder 46 retracting, the fixed gear 42 can still mesh with the fixed rack 313 on the outer wall of the first guide hoop 31.

[0129] After the first guide hoop 31 and the second guide hoop 32 in the guide mechanism complete the action of encircling and embracing the prefabricated pipe pile 6, the ends of the first guide hoop 31 and the second guide hoop 32 overlap. When the travel motor 44 is started, because the plug block 4511 is plugged into the slot 441, the output shaft of the travel motor 44 drives the movable shaft 451 to rotate together, so that the fixed gear 42 and the movable gear 43 rotate together.

[0130] Because the thickness of the fixed gear 42 is smaller than the thickness of the fixed rack 313, and the thickness of the movable gear 43 is larger than the thickness of the movable rack 322, when the traveling mechanism is located at the non-end position of the first guide hoop 31, the fixed gear 42 and the movable gear 43 are both meshed with the fixed rack 313 on the outer side wall of the first guide hoop 31, and driven by the traveling motor 44, the fixed gear 42 and the movable gear 43 are both moved around the fixed rack 313 on the outer side wall of the first guide hoop 31, so that the traveling mechanism as a whole moves along the fixed rack 313 on the outer side wall of the first guide hoop 31. Moreover, at this time, the sliding cooperation between the first dovetail groove 418 and the first slide rail 312 can keep the height of the traveling frame 41 unchanged.

[0131] When the traveling mechanism is located at the overlapping position of the end of the first guide hoop 31 and the end of the second guide hoop 32, the fixed gear 42 is meshed with the fixed rack 313, and the movable gear 43 is meshed not only with the fixed rack 313, but also with the movable rack 322. Driven by the traveling motor 44, the fixed gear 42 and the movable gear 43 move together around the overlapping portion of the first guide hoop 31 and the second guide hoop 32, and then the traveling mechanism can be driven to move along the overlapping portion of the first guide hoop 31 and the second guide hoop 32. In addition, at this time, the sliding cooperation of the first dovetail groove 418 and the first slide rail 312, and the sliding cooperation of the second dovetail groove 419 and the second slide rail 321 can keep the height of the traveling frame 41 unchanged.

[0132] When the traveling mechanism is located at the non-end position of the second guide hoop 32, only the movable gear 43 is meshed with the movable rack 322 on the outer side wall of the second guide hoop 32. Driven by the traveling motor 44, the movable gear 43 moves around the movable rack 322 on the outer side wall of the second guide hoop 32, and then the traveling mechanism as a whole can be driven to move along the movable rack 322 on the outer side wall of the second guide hoop 32. Moreover, at this time, the second dovetail groove 419 and the second slide rail 321 are slidably matched, so that the traveling frame 41 can maintain a constant height.

[0133] In summary, when the plug block 4511 is plugged into the slot 441, the walking mechanism can move along the guide mechanism around the prefabricated pipe pile 6, the height of the walking mechanism remains unchanged, and the height of the welding gun installed on the walking mechanism remains unchanged, so the welding height can be kept stable.

[0134] According to the above working principle of the present embodiment 3, it can be known that the present embodiment 3 has the following effects:

[0135] In Example 1, the friction between the fixed wheel and the outer wall of the first guide hoop 31 and the friction between the movable wheel and the outer wall of the second guide hoop 32 are used to drive the walking mechanism to move along the first guide hoop 31 and the second guide hoop 32. When the friction is reduced, the fixed wheel and the movable wheel are at risk of slipping. When slipping occurs, the walking mechanism and the welding gun 5 cannot move effectively. At this time, the welding position where the welding gun 5 is stranded is prone to overheating, resulting in deformation of the welding area and reduced welding quality.

[0136] In the present embodiment 3, the meshing between the fixed gear 42 and the fixed rack 313, and the meshing between the movable gear 43 and the movable rack 322 are used to drive the walking mechanism to move along the first guide hoop 31 and the second guide hoop 32. The present embodiment 3 uses the meshing between the teeth to reduce the risk of slipping when driving the walking mechanism to move, ensures that the walking structure carries the welding gun 5 to move reliably and effectively, and avoids the welding gun 5 from being stranded at a certain position, which is beneficial to ensuring the welding quality and improving the reliability of the welding operation.

[0137] Embodiment 4:

[0138] Based on Example 3, this Example 4 further improves the walking mechanism:

[0139] See also Figure 1 , Figure 2 and Figure 4A linkage plate 412 is provided on the side of the traveling frame 41, and the linkage plate 412 and the traveling frame 41 are an integral structure. A rotating seat 413 is fixedly mounted on the linkage plate 412. A rotating arm 414 is rotatably connected to the upper end of the rotating seat 413. A hammer 415 is fixedly mounted on the upper end of the rotating arm 414, and a cylinder 416 is fixedly mounted on the lower end of the rotating arm 414. The rotating seat 413 is connected to the lower part of the rotating arm 414 through an elastic member, and the elastic member can be a spring 417, and the spring 417 is used to pull the lower part of the rotating arm 414 to swing downward, so that the cylinder 416 keeps in contact with the fixed rack 313 and the movable rack 322.

[0140] The working principle of this embodiment 4 is as follows:

[0141] See also Fig.13 and Fig.14 When the traveling mechanism moves along the guiding mechanism, the linkage plate 412 moves with the traveling frame 41 behind the traveling frame 41, and the linkage plate 412 drives the rotating seat 413, the rotating arm 414, the hammer 415 and the cylinder 416 to move together. Under the pulling action of the elastic force of the spring 417, the cylinder 416 moves in accordance with the toothed surface of the fixed rack 313 and the movable rack 322. When the cylinder 416 is located in the concave part of the tooth, the upper end of the rotating arm 414 drives the hammer 415 to move upward; when the cylinder 416 is located in the convex part of the tooth, the rotating arm 414 drives the hammer 415 to move downward. The rotating arm 414 drives the hammer 415 to continuously hammer the coating at the weld up and down, causing the coating to fall off, thereby achieving the cleaning of the coating.

[0142] According to the above working principle of the present embodiment 4, it can be known that the present embodiment 4 has the following effects:

[0143] First, by setting the linkage plate 412, the rotating seat 413, the rotating arm 414, the hammer 415, the cylinder 416 and the elastic member, the driving force of the walking frame 41, the tooth shape of the fixed rack 313, the tooth shape of the movable rack 322, and the elastic force of the elastic member can be utilized to drive the rotating arm 414 to swing back and forth, and the rotating arm 414 drives the hammer 415 to reciprocately strike the coating at the weld, thereby realizing mechanical cleaning operations. There is no need for workers to manually clean the coating, which is beneficial to reducing labor intensity and improving the cleaning efficiency of the coating.

[0144] Second, because the linkage plate 412 moves with the traveling frame 41 behind the traveling frame 41, the welding gun 5 on the traveling frame 41 performs welding operations to form a weld at the joint of the two prefabricated pipe piles 6, and the hammer 415 on the linkage plate 412 strikes the flux at the weld. This process realizes the linkage between the welding operation and the flux cleaning operation, which is beneficial to further improve the efficiency of flux cleaning.

[0145] Third, usually in multi-layer welding, after welding a layer of weld, the coating needs to be knocked off before welding the next layer of weld. After knocking off the coating, the new weld layer is ensured to be seamlessly combined with the previous layer, which is conducive to improving the welding quality. This embodiment can clean the coating while welding, so that the next layer of welding can be carried out more quickly, which can improve the efficiency of multi-layer welding operations.

[0146] Fourth, the coating cleaning operation does not require the use of other power sources, which is conducive to saving energy. In addition, the mechanism formed by the linkage plate 412, the rotating seat 413, the rotating arm 414, the hammer 415, the cylinder 416 and the elastic member is simple in structure and easy to assemble, which is conducive to improving assembly efficiency.

[0147] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A prefabricated pipe pile connection welding device, comprising a pile holding mechanism, a guiding mechanism, a traveling mechanism and a welding gun, characterized in that: The pile holding mechanism comprises a first pile holding hoop and a second pile holding hoop, the second pile holding hoop is slidably connected with the first pile holding hoop along the circumference of the first pile holding hoop, and the first pile holding hoop is provided with a driving mechanism, the driving mechanism is used to drive the second pile holding hoop to slide relative to the first pile holding hoop; The guiding mechanism comprises a first guiding hoop and a second guiding hoop, the first pile holding hoop is connected to the first guiding hoop through a first support rod, and the second pile holding hoop is connected to the second guiding hoop through a second support rod; The traveling mechanism moves along the first guide hoop and the second guide hoop, and the welding gun is arranged on the traveling mechanism.

2. A prefabricated pipe pile connection welding device as claimed in claim 1, characterized in that: The outer side wall of the first pile holding hoop is provided with a mounting frame, and the mounting frame is connected to the mobile equipment.

3. A prefabricated pipe pile connection welding device as claimed in claim 2, characterized in that: The inner side wall of the first pile holding hoop is provided with a plurality of first wheel frames, on which a first guide wheel is rotatably connected; the inner side wall of the second pile holding hoop is provided with a plurality of second wheel frames, on which a second guide wheel is rotatably connected, and both the first guide wheel and the second guide wheel are in contact with the side wall of the prefabricated pipe pile.

4. A prefabricated pipe pile connection welding device as claimed in claim 2, characterized in that: The driving mechanism includes a motor seat, a driving motor, a driving gear, and a driven rack. The motor seat is arranged on the outer side wall of the first pile holding hoop, the driving motor is arranged on the motor seat, the output shaft of the driving motor is provided with a driving gear, and the driven rack is arranged on the outer side wall of the second pile holding hoop, and the driving gear is meshed with the driven rack.

5. A prefabricated pipe pile connection welding device as claimed in claim 2, characterized in that: The arc angles of the first pile-holding hoop and the second pile-holding hoop are both greater than 180°, and the arc angles of the first guide hoop and the second guide hoop are both greater than 180°.

6. A prefabricated pipe pile connection welding device as claimed in claim 2, characterized in that: The walking mechanism includes a walking frame, fixed wheels, movable wheels, a walking motor, a sliding seat, and a telescopic structure; The inner bottom wall of the walking frame is slidably connected to the bottom surface of the first guide hoop along the circumference of the first guide hoop, and the inner top wall of the walking frame is slidably connected to the top surface of the second guide hoop along the circumference of the second guide hoop; The interior of the walking frame is provided with fixed wheels and movable wheels; A walking motor is arranged at the bottom of the walking frame, an output shaft of the walking motor passes through the bottom of the walking frame upward, the output shaft of the walking motor is connected to the fixed wheel, and a slot is arranged at the upper end of the output shaft of the walking motor; The top of the walking frame is slidably connected with a sliding seat, and a telescopic structure is provided on the top of the walking frame, and the telescopic structure is used to drive the sliding seat to slide; A movable shaft is rotatably connected to the slide seat, a movable wheel is arranged on the movable shaft, and an insert block is arranged at the lower end of the movable shaft; When the telescopic structure is shortened, the plug block is plugged into the slot, the fixed wheel is matched with the outer side wall of the first guide hoop, and the movable wheel is matched with the outer side wall of the second guide hoop.

7. A prefabricated pipe pile connection welding device as claimed in claim 6, characterized in that: The fixed wheel adopts a fixed gear, and the movable wheel adopts a movable gear. The outer wall of the first guide hoop is provided with a fixed rack, and the outer wall of the second guide hoop is provided with a movable rack. The fixed gear cooperates with the fixed rack, and the fixed rack and the movable rack both cooperate with the movable gear.

8. A prefabricated pipe pile connection welding device as claimed in claim 7, characterized in that: A linkage plate is provided on the side of the walking frame, and a rotating seat is provided on the linkage plate. The upper end of the rotating seat is rotatably connected to a rotating arm, a hammer is provided at the upper end of the rotating arm, and a cylinder is provided at the lower end of the rotating arm. The rotating seat is connected to the lower part of the rotating arm through an elastic member, and the elastic member is used to pull the lower part of the rotating arm to swing downward so that the cylinder keeps in contact with the fixed rack and the movable rack.

9. A prefabricated pipe pile connection welding device as claimed in claim 6, characterized in that: The telescopic structure adopts an air cylinder, an oil cylinder or an electric push rod.

10. A method for using a prefabricated pipe pile connection welding device, characterized in that: Based on the prefabricated pipe pile connection welding device according to any one of claims 2 to 9, the use method comprises the following steps: S1, starting the mobile device, which carries the pile holding mechanism, the guiding mechanism, the walking mechanism, and the welding gun close to the upper and lower prefabricated pipe piles in a docking state; S2, starting the driving mechanism, driving the second pile holding hoop to slide relative to the first pile holding hoop, until the second pile holding hoop and the first pile holding hoop embrace the prefabricated pipe pile, and closing the driving mechanism, at which time, the first guide hoop and the second guide hoop also embrace the prefabricated pipe pile; S3, start the walking mechanism and the welding gun, the walking mechanism carries the welding gun and moves along the first guide hoop and the second guide hoop, the welding gun welds the connection positions of the upper and lower prefabricated pipe piles, and after the welding is completed, close the walking mechanism and the welding gun; S4, start the driving mechanism, which drives the second pile holding hoop to slide in the opposite direction relative to the first pile holding hoop until the second pile holding hoop overlaps with the first pile holding hoop, and then close the driving mechanism. At this time, the first guide hoop and the second guide hoop also overlap, and then start the mobile device, which carries the hoop mechanism away from the prefabricated pipe pile.

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