Bilateral wire feeding welding system suitable for narrow space

Abstract

The utility model relates to a bilateral wire feeding welding system suitable for a narrow space, and belongs to the technical field of welding. According to the technical scheme, the two sides of a trolley body (14) of a welding trolley (1) are connected with a wire feeding device (2) through handle sleeves (109) respectively; a swing arm (108) is arranged in the middle of the trolley body, the welding trolley is connected with a lifting device (4) through the swing arm (108), the lifting device is connected with a swing device (5), welding wire position adjusting devices (7) are arranged on the two sides of the swing device, and a welding gun assembly (6) is arranged below the swing device. A clamping mechanism is installed below the trolley body, the trolley body walks on a rack guide rail (107), and the rack guide rail is clamped through the clamping mechanism. The welding device is compact in structure, small in size and suitable for welding in a narrow space, and the welding device is prevented from shaking, overturning or falling off on a rail; a double-side wire feeding structure is adopted, and front wire feeding, rear wire feeding and double wire feeding welding modes can be achieved; positions of a molten pool and a welding gun can be observed in real time.

Description

Technical Field

[0001] This utility model relates to a double-sided wire feeding welding system suitable for confined spaces, belonging to the field of welding technology. Background Technology

[0002] In certain complex working conditions, such as large engineering structures, large storage tanks, ships, nuclear power plants, and large-diameter pipelines, when welding long straight butt welds or fillet welds between or inside narrow workpieces, space constraints make it difficult to achieve smooth welding operations. Without welding, there is a risk of insufficient connection strength or foreign matter inclusion. Developing small-volume welding devices suitable for welding in confined spaces is one of the core technical problems that related industries urgently need to solve. Existing small-volume welding devices are mainly divided into two categories: one is trackless welding devices, such as patents CN201922478035.7 entitled "A Magnetic Tracked Structure and Robot" and CN 202020085668.1 entitled "A Wall-Climbing Robot," both of which are trackless welding devices. However, trackless welding devices are prone to problems such as unstable center of gravity, inaccurate motion control, and susceptibility to external interference, resulting in limited practical engineering applications. Another type is a tracked welding device. For example, patent application number CN 202310415759.5, entitled "An Open Pipeline All-Position Welding Device", provides a tracked welding device. However, this type of welding device is prone to shaking, flipping or falling off on the track; in addition, the welding device is relatively large in size and weight, and is not suitable for welding in confined spaces. Utility Model Content

[0003] The purpose of this invention is to provide a double-sided wire feeding welding system suitable for confined spaces. It has a compact structure and small size, making it suitable for welding in confined spaces and preventing the welding device from shaking, flipping, or falling off on the track. The double-sided wire feeding structure can realize front wire feeding, rear wire feeding, and double wire feeding welding modes, thus solving the above-mentioned problems existing in the background art.

[0004] The technical solution of this utility model is:

[0005] A double-sided wire feeding welding system suitable for confined spaces includes a welding carriage, a wire feeding device, a lifting device, a rocking device, and a wire position adjustment device. The two sides of the welding carriage are connected to the wire feeding device via sleeves. A retractable swing arm is located in the middle of the carriage. The welding carriage is connected to the lifting device via the swing arm, and the lifting device is connected to the rocking device. Wire position adjustment devices are located on both sides of the rocking device, and a welding torch assembly is located below the rocking device. The position of the welding torch assembly can be adjusted via the lifting device and the rocking device, and the wire feeding position can be adjusted via the wire position adjustment devices. A clamping mechanism is installed below the carriage, and the carriage travels on a rack and pinion guide rail, which is clamped by the clamping mechanism.

[0006] The welding trolley includes a main traveling mechanism, an auxiliary traveling mechanism, and a swinging mechanism, all of which are mounted on the trolley body. The main traveling mechanism includes a main traveling motor, a first traveling gear, and a second traveling gear. The output shaft of the main traveling motor is equipped with the first traveling gear, which meshes with the second traveling gear. The auxiliary traveling mechanism includes an auxiliary traveling motor, an auxiliary traveling gear, and a second auxiliary traveling gear. The output shaft of the auxiliary traveling motor is equipped with the first auxiliary traveling gear, which meshes with the second auxiliary traveling gear. Both the second traveling gear and the second auxiliary traveling gear mesh with a rack and pinion guide rail. The swinging mechanism drives the swing arm to extend and retract.

[0007] The clamping mechanism includes a handle, a pressure plate, a large conical wheel, and a small conical wheel. The pressure plate, large conical wheel, and small conical wheel are all installed under the vehicle body, and the handle is installed on the pressure plate. There are two large conical wheels and two small conical wheels. The rack guide rail has an inverted trapezoidal cross-section. The two small conical wheels are fixedly installed on one side of the rack guide rail and fit against that side. The pressure plate and the two large conical wheels are located on the other side of the rack guide rail. The two large conical wheels are located between the rack guide rail and the pressure plate. The conical wheel shafts of the two large conical wheels are connected to the pressure plate. Rotating the handle moves the pressure plate and simultaneously moves the large conical wheels, thereby clamping or releasing the large conical wheels from the other side of the rack guide rail.

[0008] The shaking device includes a shaking motor, a motor gear, a large gear, a mounting block, and a welding torch holder. The welding torch holder has a mounting block, on which the motor gear and the large gear are mounted. The motor gear meshes with the large gear and is connected to the output shaft of the shaking motor. The welding torch assembly includes a welding torch rod, a bias tungsten electrode, a nozzle, and a reflective lens. The welding torch rod is mounted at the center of the large gear, and the bias tungsten electrode is mounted at the lower end of the welding torch rod. Lens supports are located on both sides of the welding torch rod, mounted on the welding torch holder, and reflective lenses are mounted at the lower ends of the lens supports. Nozzles are located between the welding torch rod and their corresponding lens supports on both sides, and the nozzles are mounted on the mounting block. The shaking motor drives the motor gear to rotate, which in turn drives the large gear and the welding torch rod to rotate, ultimately driving the bias tungsten electrode to rotate, thus causing the welding arc to shake within the bevel. The nozzle is vented with protective welding gas to protect the arc and the molten pool during the welding process.

[0009] Cameras are installed at both ends of the welding torch holder. Images of the electric arc and molten pool enter the camera through the light path of the shaking device via the reflective lens, thereby allowing observation and monitoring of the welding process.

[0010] The welding wire position adjustment device includes a motor, a worm gear, a turbine gear, a bearing, a screw, a motor, a worm gear, and a turbine gear. The screw has a turbine gear, a bearing, and a turbine gear. The turbine gear is threadedly connected to the screw, and the turbine gear meshes with the worm gear. The motor is mounted on the worm gear. Bearings are located at the top and bottom of the turbine gear and are fixed in place. The motor drives the worm gear to rotate, which in turn drives the turbine gear to rotate, causing the screw to move up and down. The turbine gear meshes with the worm gear, and a motor is mounted on the worm gear. Bearings are located at the top and bottom of the turbine gear and are fixed in place. A flat hole is located at the center of the turbine gear, and a platform matching this hole is located on the screw. The motor drives the worm gear to rotate, which in turn drives the turbine gear to rotate. The turbine gear, constrained by the platform on the screw, causes the screw to rotate synchronously. A wire feed rod is mounted at the lower end of the screw. The screw's movement drives the wire feed rod, thereby adjusting the wire feeding position.

[0011] The screw is provided with an upper fixing block and a lower fixing block, and turbine one, bearing and turbine two are arranged between the upper fixing block and the lower fixing block; a clamping block is provided at the lower end of the screw, and a thread feeder is installed on the clamping block.

[0012] Mounting seats are provided on both sides of the welding trolley, and the mounting seats are connected to the welding wire spool.

[0013] The wire feeding device is equipped with a wire straightening mechanism.

[0014] The nozzle is equipped with a secondary protective cover on its outer side.

[0015] The wire feeding device, wire spool, lifting device, wire straightening mechanism, main travel motor, auxiliary travel motor, rack and pinion guide, rocking motor, swing mechanism, motor one, bearing, motor two, secondary guard and camera are all commonly known and used equipment in the field.

[0016] The advantages of this utility model are: compact structure, small size, suitable for welding in narrow spaces, avoiding shaking, flipping or falling off of the welding device on the track; adopting a double-sided wire feeding structure, it can realize front wire feeding, rear wire feeding and double wire feeding welding forms; through camera and reasonable optical path design, the position of the molten pool and welding gun can be observed in real time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the welding trolley of this utility model;

[0019] Figure 3 This is a schematic diagram of the dual-drive structure of the welding trolley of this utility model;

[0020] Figure 4 This is a schematic diagram of the clamping mechanism of this utility model;

[0021] Figure 5 This is a schematic diagram of the shaking device of this utility model;

[0022] Figure 6 This is a schematic diagram of the optical path of the camera of this utility model;

[0023] Figure 7 This is a schematic diagram of the welding wire position adjustment device of this utility model;

[0024] Figure 8 This is a cross-sectional view of the screw of this utility model;

[0025] Figure 9 This is a two-section view of the turbine of this utility model;

[0026] Figure 10 This is a cross-sectional view of the turbine of this utility model;

[0027] In the diagram: Welding trolley 1, main traveling mechanism 11, auxiliary traveling mechanism 12, swing mechanism 13, trolley body 14, main traveling motor 101, traveling gear one 102, traveling gear two 103, auxiliary traveling motor 104, auxiliary traveling gear one 105, auxiliary traveling gear two 106, rack and pinion guide 107, swing arm 108, handle sleeve 109, mounting base 110, handle 111, pressure plate 112, large conical wheel 113, small conical wheel 114, wire feeding device 2, wire straightening mechanism 21, wire spool 3, lifting device 4, rocking mechanism Device 5, rocking motor 501, motor gear 502, large gear 503, welding torch rod 504, bias tungsten electrode 505, nozzle 506, reflector 507, lens holder 508, mounting block 509, welding torch holder 510, welding torch assembly 6, welding wire position adjustment device 7, motor one 701, worm gear one 702, turbine one 703, bearing 704, screw 705, motor two 706, worm gear two 707, turbine two 708, fixing block 709, lower fixing block 710, clamping block 711, secondary protective cover 8, camera 9. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and examples.

[0029] A double-sided wire feeding welding system suitable for confined spaces includes a welding carriage 1, a wire feeding device 2, a lifting device 4, a rocking device 5, and a wire position adjustment device 7. The two sides of the welding carriage 1's body 14 are connected to the wire feeding device 2 via sleeves 109. A swing arm 108 is provided in the middle of the body 14; the swing arm 108 is retractable. The welding carriage 1 is connected to the lifting device 4 via the swing arm 108, and the lifting device 4 is connected to the rocking device 5. Wire position adjustment devices 7 are provided on both sides of the rocking device 5, and a welding torch assembly 6 is provided below the rocking device 5. The position of the welding torch assembly 6 can be adjusted via the lifting device 4 and the rocking device 5, and the wire feeding position can be adjusted via the wire position adjustment devices 7. A clamping mechanism is installed below the body 14, and the body 14 travels on a rack and pinion guide 107, which is clamped by the clamping mechanism.

[0030] The welding trolley 1 includes a main traveling mechanism 11, an auxiliary traveling mechanism 12, and a swing mechanism 13, all of which are mounted on the trolley body 14. The main traveling mechanism 11 includes a main traveling motor 101, a first traveling gear 102, and a second traveling gear 103. The output shaft of the main traveling motor 101 is provided with the first traveling gear 102, which meshes with the second traveling gear 103. The auxiliary traveling mechanism 12 includes an auxiliary traveling motor 104, a first auxiliary traveling gear 105, and a second auxiliary traveling gear 106. The output shaft of the auxiliary traveling motor 104 is provided with the first auxiliary traveling gear 105, which meshes with the second auxiliary traveling gear 106. The second traveling gear 103 and the second auxiliary traveling gear 106 both mesh with the rack and pinion guide rail 107. The swing mechanism 13 drives the swing arm 108 to extend and retract.

[0031] The clamping mechanism includes a handle 111, a pressure plate 112, a large conical wheel 113, and a small conical wheel 114. The pressure plate 112, the large conical wheel 113, and the small conical wheel 114 are all installed below the vehicle body 14. The handle 111 is installed on the pressure plate 112. There are two large conical wheels 113 and two small conical wheels 114. The rack guide rail 107 has an inverted trapezoidal cross section. The two small conical wheels 114 are fixedly installed on one side of the rack guide rail 107 and fit against one side of the rack guide rail 107. The pressure plate 112 and the two large conical wheels 113 are located on the other side of the rack guide rail 107. The two large conical wheels 113 are located between the rack guide rail 107 and the pressure plate 112. The conical wheel shafts of the two large conical wheels 113 are connected to the pressure plate 112. Rotating the handle 111 moves the pressure plate 112 and simultaneously moves the large conical wheels 113, thereby clamping or releasing the large conical wheels 113 from the other side of the rack guide rail 107.

[0032] The shaking device 5 includes a shaking motor 501, a motor gear 502, a large gear 503, a mounting block 509, and a welding torch holder 510. The welding torch holder 510 is equipped with the mounting block 509, on which the motor gear 502 and the large gear 503 are mounted. The motor gear 502 meshes with the large gear 503 and is connected to the output shaft of the shaking motor 501. The welding torch assembly 6 includes a welding torch rod 504, a bias tungsten electrode 505, a nozzle 506, and a reflector 507. The welding torch rod 504 is mounted at the center of the large gear 503, and the bias tungsten electrode 505 is mounted at the lower end of the welding torch rod 504. Lens supports 508 are provided on both sides of the welding torch rod 504. The lens supports 508 are mounted on the welding torch holder 510, and a reflective lens 507 is installed at the lower end of the lens supports 508. Nozzles 506 are provided between the two sides of the welding torch rod 504 and the corresponding lens supports 508. The nozzles 506 are mounted on the mounting block 509. The rocking motor 501 drives the motor gear 502 to rotate, and the motor gear 502 drives the large gear 503 and the welding torch rod 504 to rotate, which in turn drives the bias tungsten electrode 505 to rotate, thereby realizing the rocking of the welding arc in the bevel. The nozzle 506 is filled with protective welding gas to protect the arc and the molten pool during the welding process.

[0033] Cameras 9 are installed at both ends of the welding torch holder 510. The images of the electric arc and the molten pool enter the camera 9 through the reflective lens 507 along the optical path of the shaking device 5, thereby observing and monitoring the welding process.

[0034] The welding wire position adjustment device 7 includes a first motor 701, a first worm gear 702, a first turbine gear 703, a bearing 704, a screw 705, a second motor 706, a second worm gear 707, and a second turbine gear 708. The screw 705 is equipped with the first turbine gear 703, the bearing 704, and the second turbine gear 708. The first turbine gear 703 and the screw 705 are threadedly connected. The first turbine gear 703 meshes with the first worm gear 702. The first motor 701 is mounted on the first worm gear 702. The first turbine gear 703 is secured at both the top and bottom with bearings 704. The first motor 701 drives the first worm gear 702 to rotate, and the first worm gear 702 drives the first turbine gear 703 to rotate. The screw 705 moves up and down; the second worm gear 708 meshes with the second worm gear 707, and the second motor 706 is mounted on the second worm gear 707; the second worm gear 708 is provided with bearings 704 at its top and bottom, and is fixed by the bearings 704; the second worm gear 708 has a flat hole in its center, and the screw 705 has a platform that matches the flat hole; the second motor 706 drives the second worm gear 707 to rotate, the second worm gear 707 drives the second worm gear 708 to rotate, and the second worm gear 708 is restricted by the platform on the screw 705 to drive the screw 705 to rotate synchronously; a wire feeder is mounted on the lower end of the screw 705, and the movement of the screw 705 drives the movement of the wire feeder, thereby realizing the adjustment of the wire feeding position.

[0035] The screw 705 is provided with an upper fixing block 709 and a lower fixing block 710. Turbine 1 703, bearing 704 and turbine 2 708 are arranged between the upper fixing block 709 and the lower fixing block 710. The lower end of the screw 705 is provided with a clamping block 711, and a thread feeder is installed on the clamping block 711.

[0036] Mounting seats 110 are provided on both sides of the body 14 of the welding trolley 1, and the mounting seats 110 are connected to the welding wire spool 3.

[0037] The wire feeding device 2 is equipped with a wire straightening mechanism 21.

[0038] The nozzle 506 is provided with a secondary protective cover 8 on its outer side.

[0039] In this embodiment, refer to the appendix. Figure 1-4 The welding carriage 1 consists of a main traveling mechanism 11, an auxiliary traveling mechanism 12, a swinging mechanism 13, and a carriage body 14. There are two sets of wire feeding devices 2, which are connected to the carriage body 14 through the handle sleeve 109 of the welding carriage. Each set of wire feeding devices 2 is equipped with a wire straightening mechanism 21. Mounting seats 110 are provided on both sides of the carriage body 14, and each mounting seat 110 is connected to a wire spool 3. The swinging mechanism 13 is a general swinging slide structure, which can realize the extension and retraction of the swinging arm 108, thereby driving the welding gun assembly mounted on it to move and realize the swinging of the welding gun and the arc. The lifting device 4 is connected to the welding carriage 1 through the swinging arm 108, and the lifting device 4 is connected to the rocking device 5. There is a camera 9 and a wire position adjustment device 7 on each side of the rocking device 5. The welding gun assembly 6 is installed below the rocking device 5.

[0040] The main traveling mechanism 11 of the welding carriage 1 is responsible for driving the machine head to move along the guide rail 107. The auxiliary traveling mechanism 12 passively follows to eliminate the tooth backlash between the gears and the track. The main traveling mechanism 11 and the auxiliary traveling mechanism 12 work together to drive the welding carriage 1 to move along the rack guide rail 107. The main traveling mechanism 11 includes a main traveling motor 101, a first traveling gear 102, and a second traveling gear 103. The output shaft of the main traveling motor 101 is equipped with the first traveling gear 102, which meshes with the second traveling gear 103. The auxiliary traveling mechanism 12 includes an auxiliary traveling motor 104, a first auxiliary traveling gear 105, and a second auxiliary traveling gear 106. The output shaft of the auxiliary traveling motor 104 is equipped with the first auxiliary traveling gear 105, which meshes with the second auxiliary traveling gear 106. The second traveling gear 103 of the main traveling mechanism 11 and the second auxiliary traveling gear 106 of the auxiliary traveling mechanism 12 both mesh with the rack guide rail 107. The clamping mechanism includes a handle 111, a pressure plate 112, a large conical wheel 113, and a small conical wheel 114. When the welding carriage 1 is installed with the rack and pinion guide 107, the handle 111 is loosened by rotating it, which moves the pressure plate 112 backward and simultaneously moves the two large conical wheels 113 backward. The two small conical wheels 114 are fixed-side small conical wheels and are in contact with one side of the rack and pinion guide 107. By tightening the handle 111, the pressure plate 112 is moved forward, which simultaneously moves the two large conical wheels 113 forward. After the distance between the two sets of conical wheels is reduced, they are in contact with the other side of the rack and pinion guide 107, and the rack and pinion guide 107 is clamped by the large conical wheels 113 and the small conical wheels 114.

[0041] The welding torch holder 510 of the shaking device 5 is provided with a mounting block 509, on which a motor gear 502 and a large gear 503 are mounted, with the motor gear 502 meshing with the large gear 503; a shaking motor 501 is mounted on the motor gear 502; a welding torch rod 504 is mounted at the center of the large gear 503, and a bias tungsten electrode 505 is mounted at the lower end of the welding torch rod 504; nozzles 506 are respectively provided on both sides of the welding torch rod 504, and the nozzles 506 are mounted on the mounting block 509, through which a protective welding gas is passed. The welding torch 510 is equipped with two nozzles 506, each with a lens holder 508 mounted on its outer side. A reflective lens 507 is installed at the lower end of each lens holder 508. Cameras 9 are mounted at both ends of the welding torch 510. During welding, the shaking motor 501 drives the motor gear 502 to rotate according to set parameters, which in turn drives the large gear 503 and the welding torch rod 504 to rotate, ultimately driving the bias tungsten electrode 505 to rotate, thus causing the welding arc to shake within the bevel. Shielding welding gas flows out through the nozzles 506, protecting the welding arc and the molten pool. Images of the arc and molten pool are transmitted through the reflective lens 507 along the optical path of the shaking device 5 to the camera 9, allowing for observation and monitoring of the welding process.

[0042] The upper fixing block 709 and the lower fixing block 710 of the welding wire position adjustment device 7 are arranged from top to bottom as follows: bearing 704, turbine 1 703, two bearings 704, turbine 2 708, and bearing 704. The screw 705 is installed at the center of the above parts. Turbine 1 703 and worm 1 702 mesh with each other, and motor 1 701 is installed on worm 1 702. Turbine 2 708 and worm 2 707 mesh with each other, and motor 2 706 is installed on worm 2 707. The lower end of the screw 705 is provided with a clamping block 711 for installing the wire feeding rod.

[0043] The screw 705 has a diameter of C and a platform with a width of B machined around its circumference; the turbine 703 has a circular threaded hole at its center, which is an MC thread with a diameter of C, and the screw 705 is an MC screw, with the turbine 703 and the screw 705 threadedly connected; the turbine 708 has a flat hole at its center with a width of B, through which the screw 705 passes; during operation, the motor 701 drives the worm gear 702 to rotate, thereby driving the meshing turbine 703 to rotate. Since the turbine 703 is fixed vertically by the bearing 704, it can only rotate. 03 is threadedly connected to screw 705. The height of turbine 703 is fixed by bearing 704, at which time screw 705 moves up and down. Motor 2 706 drives worm gear 2 707 to rotate, thereby driving turbine 2 708, which meshes with it, to rotate. Turbine 2 708 can only rotate after being fixed up and down by bearing 704. When turbine 2 708 rotates, it will drive screw 705 to rotate synchronously due to the platform limitation of width B of screw 705. Through the above structure, the screw height and rotation angle are controlled separately, which drives the clamping block 711 at the lower end of screw 705 to move, thereby realizing the adjustment of the wire feeding position.

[0044] This utility model adopts a double-sided wire feeding structure, which can realize front wire feeding, rear wire feeding and double wire feeding welding forms; the welding wire on the welding wire spool 3 is conveyed by the wire feeding device, straightened by the welding wire straightening mechanism 21, and then the wire feeding position is adjusted by the welding wire position adjustment device 7.

[0045] This utility model has a compact structure and small size, making it suitable for welding in confined spaces. The welding carriage engages with the rack and pinion guide rail via a traveling gear, and the clamping mechanism clamps the rack and pinion guide rail to prevent the welding device from shaking, flipping, or falling off on the track. The carriage adopts a dual-drive structure, which has high precision and good stability, making it more suitable for high-precision welding scenarios. Through a reasonable optical path design, the position of the molten pool and welding torch can be observed in real time.

Claims

1. A double-sided wire feeding welding system suitable for confined spaces, characterized in that: The device includes a welding carriage (1), a wire feeding device (2), a lifting device (4), a rocking device (5), and a wire position adjustment device (7). The two sides of the carriage body (14) of the welding carriage (1) are connected to the wire feeding device (2) via a glove sleeve (109). A swing arm (108) is provided in the middle of the carriage body (14). The swing arm (108) is telescopic. The welding carriage (1) is connected to the lifting device (4) via the swing arm (108). The lifting device (4) is connected to the rocking device (5). Wire position adjustment devices (7) are provided on both sides of the rocking device (5). A welding torch assembly (6) is provided below the rocking device (5). A clamping mechanism is installed below the carriage body (14). The carriage body (14) travels on the rack guide rail (107). The rack guide rail (107) is clamped by the clamping mechanism.

2. The double-sided wire feeding welding system suitable for confined spaces according to claim 1, characterized in that: The welding trolley (1) includes a main walking mechanism (11), an auxiliary walking mechanism (12), and a swing mechanism (13), all of which are mounted on the trolley body (14). The main walking mechanism (11) includes a main walking motor (101), a first walking gear (102), and a second walking gear (103). The output shaft of the main walking motor (101) is provided with the first walking gear (102), and the first walking gear (102) and the second walking gear (103) are connected. The auxiliary walking mechanism (12) includes an auxiliary walking motor (104), an auxiliary walking gear one (105), and an auxiliary walking gear two (106). The output shaft of the auxiliary walking motor (104) is provided with an auxiliary walking gear one (105), and the auxiliary walking gear one (105) meshes with the auxiliary walking gear two (106). The walking gear two (103) and the auxiliary walking gear two (106) both mesh with the rack guide rail (107). The swing mechanism (13) drives the swing arm (108) to extend and retract.

3. A double-sided wire feeding welding system suitable for confined spaces according to claim 1 or 2, characterized in that: The clamping mechanism includes a handle (111), a pressure plate (112), a large conical wheel (113), and a small conical wheel (114). The pressure plate (112), the large conical wheel (113), and the small conical wheel (114) are all installed below the vehicle body (14). The handle (111) is installed on the pressure plate (112). There are two large conical wheels (113) and two small conical wheels (114). The rack guide rail (107) has an inverted trapezoidal cross section. The two small conical wheels (114) are fixedly installed on one side of the rack guide rail (107) and are in contact with one side of the rack guide rail (107). The pressure plate (112) and the two large conical wheels (113) are installed on the other side of the rack guide rail (107). The two large conical wheels (113) are installed between the rack guide rail (107) and the pressure plate (112). The conical wheel shafts of the two large conical wheels (113) are connected to the pressure plate (112).

4. A double-sided wire feeding welding system suitable for confined spaces according to claim 1 or 2, characterized in that: The shaking device (5) includes a shaking motor (501), a motor gear (502), a large gear (503), a mounting block (509), and a welding torch holder (510). The welding torch holder (510) is provided with a mounting block (509), and the motor gear (502) and the large gear (503) are mounted on the mounting block (509). The motor gear (502) meshes with the large gear (503), and the motor gear (502) is connected to the output shaft of the shaking motor (501). The welding torch assembly (6) includes a welding torch rod (504), a bias tungsten electrode (505), and a spray nozzle. The nozzle (506) and reflector (507) are provided. The welding gun rod (504) is installed at the center of the large gear (503). The bias tungsten electrode (505) is installed at the lower end of the welding gun rod (504). Lens brackets (508) are provided on both sides of the welding gun rod (504). The lens brackets (508) are installed on the welding gun frame (510). The reflector (507) is installed at the lower end of the lens brackets (508). The nozzles (506) are provided between the two sides of the welding gun rod (504) and the corresponding lens brackets (508). The nozzles (506) are installed on the mounting block (509).

5. A double-sided wire feeding welding system suitable for confined spaces according to claim 4, characterized in that: Cameras (9) are installed at both ends of the welding torch holder (510).

6. A double-sided wire feeding welding system suitable for confined spaces according to claim 1 or 2, characterized in that: The welding wire position adjustment device (7) includes a motor (701), a worm gear (702), a turbine gear (703), a bearing (704), a screw (705), a motor (706), a worm gear (707), and a turbine gear (708). The screw (705) is equipped with a turbine gear (703), a bearing (704), and a turbine gear (708). The turbine gear (703) and the screw (705) are threaded together. The turbine gear (703) meshes with the worm gear (702). The worm gear (702) has... Motor 1 (701) is installed; bearings (704) are provided on the upper and lower parts of turbine 1 (703) and fixed by bearings (704); turbine 2 (708) meshes with worm 2 (707) and motor 2 (706) is installed on worm 2 (707); bearings (704) are provided on the upper and lower parts of turbine 2 (708) and fixed by bearings (704); a flat hole is provided in the center of turbine 2 (708) and a platform matching the flat hole is provided on screw (705); a thread feeder is installed at the lower end of screw (705).

7. A double-sided wire feeding welding system suitable for confined spaces according to claim 6, characterized in that: The screw (705) is provided with an upper fixing block (709) and a lower fixing block (710), and a turbine one (703), a bearing (704) and a turbine two (708) are arranged between the upper fixing block (709) and the lower fixing block (710); a clamping block (711) is provided at the lower end of the screw (705), and a thread feeder is installed on the clamping block (711).

8. A double-sided wire feeding welding system suitable for confined spaces according to claim 1 or 2, characterized in that: The welding trolley (1) has mounting seats (110) on both sides of its body (14), and the mounting seats (110) are connected to the welding wire spool (3).

9. A double-sided wire feeding welding system suitable for confined spaces according to claim 1 or 2, characterized in that: The wire feeding device (2) is equipped with a wire straightening mechanism (21).

10. A double-sided wire feeding welding system suitable for confined spaces according to claim 5, characterized in that: The nozzle (506) is provided with a secondary protective cover (8) on its outer side.

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