Welding system and method

Abstract

The invention relates to pipeline welding maintenance, in particular to a welding system and method. The welding system comprises a rotating shaft, two sliding pipes are fixedly connected to the rotating shaft, a worm is rotationally connected into the rotating shaft, a first worm gear is connected to the worm in a meshed mode, the first worm gear is rotationally connected with one sliding pipe, a first sliding rod is connected to the first worm gear in a meshed mode, and a welding head is fixedly connected to the upper end of the first sliding rod. A welding method comprises the following steps that firstly, the device is placed in a pipeline, and a rubber wheel is driven to rotate till a pressing roller is located at the damaged position of the pipeline; secondly, a hydraulic rod is driven to extend, and meanwhile a lead screw is driven to rotate; thirdly, a second motor is driven to rotate forwards, and then a rubber wheel, a first motor and a grinding wheel are driven to rotate cooperatively; and fourthly, a second motor is driven to rotate reversely, then a welding head is started, and a driving rubber wheel and a first motor are matched to rotate. According to the system and the method, the damaged pipeline can be conveniently welded and maintained.

Description

Technical Field

[0001] This invention relates to pipeline welding and repair, and more specifically to a welding system and method. Background Technology

[0002] Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature, or high pressure. Pipeline repair welding refers to the welding process performed when repairing pipelines. During pipeline use, various reasons may lead to damage or leaks, requiring pipeline repair, and welding is a common repair method. When performing pipeline repair welding, the damaged area must first be cleaned, and then welding techniques are used to repair or connect the pipeline to ensure its integrity and safety. Pipelines are generally buried underground; when leaks occur, the ground at the leaking section needs to be dug up, and then the damaged area needs to be manually welded for repair. However, digging up pipelines is often time-consuming and labor-intensive. Summary of the Invention

[0003] This invention provides a welding system and method, the purpose of which is to facilitate welding repair of damaged pipelines.

[0004] The above objectives are achieved through the following technical solutions:

[0005] A welding system includes a rotating shaft with two slide tubes fixedly connected to it. A worm gear is rotatably connected inside the rotating shaft, and a first worm wheel is meshed on the worm gear. The first worm wheel is rotatably connected to one slide tube, and a first slide rod is meshed on the first worm wheel. A welding head is fixedly connected to the upper end of the first slide rod.

[0006] A second worm wheel is meshed on the worm, and the second worm wheel is rotatably connected to another slide tube. A second slide rod is meshed on the second worm wheel, and a grinding wheel is rotatably connected to the upper end of the second slide rod.

[0007] A movable frame is rotatably connected to the worm gear. A first motor is fixedly connected to the front end of the movable frame, and the output shaft of the first motor is fixedly connected to the rotating shaft. A second motor is fixedly connected to the rear end of the movable frame, and the output shaft of the second motor is fixedly connected to the worm gear.

[0008] A fixed frame is slidably connected to the mobile frame, and a hydraulic rod is fixed to both ends of the fixed frame. A rubber block is fixed to the moving end of each hydraulic rod.

[0009] A welding method comprising the following steps:

[0010] Step 1: Place the device in the pipe and drive the rubber wheel to rotate until the pressure roller is located at the damaged part of the pipe;

[0011] Step 2: Extend the hydraulic rod while simultaneously rotating the lead screw;

[0012] Step 3: Drive the second motor to rotate forward, which then works in conjunction with the drive rubber wheel, the first motor, and the grinding wheel to rotate;

[0013] Step 4: Drive the second motor to reverse, then start the welding head to drive the rubber wheel and the first motor to rotate. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a welding system Figure 1 ;

[0015] Figure 2 A schematic diagram of the overall structure of a welding system Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the rotating shaft section;

[0017] Figure 4 This is a schematic diagram of the worm gear section;

[0018] Figure 5 This is a structural diagram of the mobile frame section;

[0019] Figure 6 This is a schematic diagram of the fixing frame part;

[0020] Figure 7 This is a schematic diagram of the slider section;

[0021] Figure 8 This is a schematic diagram of the pressure roller section;

[0022] Figure 9 This is a schematic diagram of the rack section;

[0023] Figure 10 This is a flowchart of a welding method.

[0024] In the figure: rotating shaft 11; slide tube 101; worm gear 12; first worm wheel 201; first slide rod 202; welding head 203; second worm wheel 204; second slide rod 205; grinding wheel 206; moving frame 13; insert rod 301; wheel seat 302; first compression spring 303; rubber wheel 304; first motor 305; second motor 306; fixed frame 14; hydraulic rod 401; rubber block 402; limiting plate 403; lead screw 404; rack 405; slider 15; pressure roller seat 501; second compression spring 502; pressure roller 503; gear 504. Detailed Implementation

[0025] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] like Figures 1 to 4 To facilitate welding of damaged pipes;

[0028] Two slide tubes 101 are fixedly connected to the rotating shaft 11, the worm gear 12 is rotatably connected inside the rotating shaft 11, the first worm wheel 201 meshes with the worm gear 12, the first worm wheel 201 is rotatably connected to one of the slide tubes 101, the lower section of the first slide rod 202 is threaded, the first slide rod 202 is threadedly connected inside the first worm wheel 201, and the welding head 203 is fixedly connected to the upper end of the first slide rod 202.

[0029] The rotating shaft 11 is inserted into one end of the pipe to the damaged area without digging up the ground. First, the pipe gap is ground, then the repair part is placed at the gap, and the welding area is ground again. Then, the worm gear 12 is driven to rotate clockwise, which in turn drives the first worm wheel 201 to rotate. This drives the first slide rod 202 to move upward, so that the welding head 203 is aligned with the weld. The welding head 203 uses gas welding to melt the pipe and the repair part at the weld, welding the repair part to the weld, thereby repairing the pipe. When the welding head 203 emits a flame, it drives the rotating shaft 11 to rotate, which in turn drives the slide tube 101 to rotate, which in turn drives the first slide rod 202 to rotate. This causes the welding head 203 at the front end of the first slide rod 202 to move around the circumference of the pipe. At the same time, by controlling the rotating shaft 11 to move along the axis of the pipe, the welding head 203 is similarly driven to move in a straight line, thereby welding the repair part to the pipe from all sides, thus repairing the pipe.

[0030] like Figures 1 to 4 This is to achieve the purpose of pre-welding;

[0031] The second turbine 204 is meshed with the worm gear 12. The second turbine 204 is rotatably connected in another slide rail 101. The second slide rod 205 and the second turbine 204 are threaded together. The grinding wheel 206 is rotatably connected to the upper end of the second slide rod 205. The remote control drive motor is fixedly connected to the second slide rod 205. The output shaft of the remote control drive motor is fixedly connected to the grinding wheel 206.

[0032] Before welding, the welding area needs to be ground. The worm gear 12 is driven to rotate in the opposite direction, which in turn drives the second turbine 204 to rotate. This drives the second slide bar 205 to move upward, which in turn drives the grinding wheel 206 to the welding area. Then, the remote control motor is driven to rotate, which in turn drives the grinding wheel 206 to rotate and grind. During the rotation of the grinding wheel 206, the rotating shaft 11 is driven to rotate and move, thereby achieving the purpose of grinding the part that needs to be welded.

[0033] like Figure 1 and Figure 2 This is to achieve the purpose of controlling the rotation of the shaft and the worm gear;

[0034] The worm gear 12 is rotatably connected to the movable frame 13. The first motor 305 is fixedly connected to the front end of the movable frame 13, and the output shaft of the first motor 305 is fixedly connected to the rotating shaft 11. The second motor 306 is fixedly connected to the rear end of the movable frame 13, and the output shaft of the second motor 306 is fixedly connected to the worm gear 12.

[0035] Both the first motor 305 and the second motor 306 are equipped with remote control drive devices, and the moving frame 13 is equipped with a monitoring probe. Thus, when controlling the rotation of the shaft 11 and the worm gear 12, the first motor 305 and the second motor 306 can be driven to rotate according to the feedback from the monitoring probe. At the same time, the first motor 305 and the second motor 306 are respectively fixed to the front and rear ends of the moving frame 13, which can avoid mutual interference between the shaft 11 and the worm gear 12 when they rotate.

[0036] like Figure 1 and Figure 2 This is to achieve the purpose of controlling the movement of the rotating shaft along the axis;

[0037] Four insert rods 301 are fixedly connected to each of the front and rear ends of the movable frame 13. Each wheel seat 301 is slidably connected to the insert rod 301. The first compression spring 303 is fixedly connected between each wheel seat 301 and the movable frame 13. The rubber wheel 304 is rotatably connected to the wheel seat 301.

[0038] The rubber wheel 304 is a remote-controlled drive wheel, which drives the rubber wheel 304 to rotate, thereby driving the moving frame 13 to move back and forth, and thus driving the entire system to move forward and backward along the pipeline. The first compression spring 303 always presses the wheel seat 301 outward, causing the rubber wheel 304 to contact the inner wall of the pipeline, thereby enabling the system to meet the requirements of pipelines with different diameters. While controlling the movement of the moving frame 13, it can drive the rotating shaft 11 to move along the axis, thereby achieving the purpose of controlling the rotating shaft 11.

[0039] like Figure 1 , Figure 2 and Figure 6 To avoid the overall rotation of the system caused by the torque of the motors when driving the first and second motors;

[0040] A fixed frame 14 is slidably connected to the movable frame 13. A hydraulic rod 401 is fixedly connected to both ends of the fixed frame 14, and a rubber block 402 is fixedly connected to the moving end of each hydraulic rod 401.

[0041] When the system moves the supplement to the damaged location of the pipe, the hydraulic rod 401 extends, causing the rubber block 401 to press against the inner wall of the pipe. The friction between the rubber block 401 and the pipe prevents the fixed frame 14 from rotating. During welding and grinding, the resistance between the welding head 203 and the grinding wheel 206 and the pipe increases. When the first motor 305 and the second motor 306 are driven at this time, the torque of the motor will act on the motor body. Therefore, the motor body needs to be fixed to ensure that the output shaft of the motor rotates normally. Since the fixed frame 14 is slidably connected to the moving frame 13 on both sides, the fixed frame 14 can prevent the moving frame 13 from rotating, thereby preventing the motor body from rotating and ensuring the normal rotation of the output shafts of the first motor 305 and the second motor 306.

[0042] like Figure 7 , Figure 8 and Figure 9 In order to move the supplements to the location of the pipe rupture;

[0043] Two sliders 15 are slidably connected to the fixed frame 14. Each slider 15 is slidably connected to a pressure roller seat 501. Each pressure roller seat 501 is fixedly connected to a corresponding slider 15 with a second pressure spring 502. Each pressure roller seat 501 is rotatably connected to a pressure roller 503.

[0044] The pressure roller 503 is magnetic, attracting the metal plate used as a supplement to the pressure roller 503. This drives the moving frame 13 to move, which in turn drives the fixed frame 14 to move, which in turn drives the slider 15 to move, which in turn drives the pressure roller seat 501 to move, which in turn drives the pressure roller 503 to move, thus moving the supplement to the damaged area of ​​the pipe. Initially, the second pressure spring 502 is compressed. When the second pressure spring 502 is released, it drives the pressure roller seat 501 to move upward, which in turn drives the pressure roller 503 to move upward, thus squeezing the supplement against the inner wall of the pipe. Then, the two sliders 15 are driven to move to both sides, which in turn drives the pressure roller seat 501 to move to both sides. At the same time, the second pressure spring 502 always drives the pressure roller 503 upward, thus squeezing the supplement into a curved surface with the same shape as the inner wall of the pipe, thereby achieving the purpose of carrying the supplement to the damaged area of ​​the pipe.

[0045] like Figure 6 and Figure 9 To prevent the supplement from falling off;

[0046] A limiting plate 403 is fixedly connected to the fixed frame 14, and the limiting plate 403 is in contact with the pressure roller seat 501.

[0047] The limiting plate 403 is located between the two sliders 15. Initially, pressing the pressure roller seat 501 will press the second pressure spring 502 downward. Then, the sliders 15 are moved from the left and right sides to the middle, thereby driving the pressure roller seat 501 to the limiting plate 403. This avoids the replenishment from being too high and colliding with the inner wall of the pipe when the moving frame 13 is moved, thus preventing the replenishment from falling off.

[0048] like Figures 7 to 9 To achieve the purpose of controlling the slider 15 to move to both sides;

[0049] A lead screw 404 is rotatably connected to the fixed frame 14, and the lead screw 404 is threadedly connected to two sliders 15.

[0050] A rotary motor is fixedly connected to the fixed frame 14. The rotary motor drives the lead screw 404 to rotate, which in turn drives the two sliders 15 to move to the left and right sides simultaneously.

[0051] like Figure 9 To achieve the goal of controlling the movement of slider 15 while simultaneously controlling the rotation of pressure roller 503;

[0052] A rack 405 is slidably connected to the fixed frame 14. Each pressure roller seat 501 is slidably connected to the rack 405. A gear 504 is fixedly connected to one end of each pressure roller 503. Each gear 504 is meshed with the rack 405.

[0053] As the pressure roller seat 501 moves upward, it can drive the rack 405 to move together, thereby ensuring that the rack 405 and the two gears 504 are always meshed. When the slider 15 drives the two pressure rollers 503 to move, the pressure rollers 503 drive the gears 504 to move relative to the rack 405, thereby the rack 405 meshes with and drives the gears 504 to rotate, thereby driving the pressure rollers 503 to rotate.

[0054] like Figure 10 A welding method comprising the following steps:

[0055] Step 1: Place the device in the pipe and drive the rubber wheel 304 to rotate until the pressure roller 503 is located at the damaged part of the pipe;

[0056] Step 2: Extend the hydraulic rod 401 while simultaneously rotating the lead screw 404;

[0057] Step 3: Drive the second motor 306 to rotate forward, and then coordinate with the drive rubber wheel 304, the first motor 305 and the grinding wheel 206 to rotate;

[0058] Step 4: Drive the second motor 306 to reverse, then start the welding head 203, which in turn drives the rubber wheel 304 and the first motor 305 to rotate.

Claims

1. A welding system, characterized in that: Includes a rotating shaft (11), on which two slide tubes (101) are fixedly connected. A worm gear (12) is rotatably connected inside the rotating shaft (11). A first worm wheel (201) is meshed on the worm gear (12). The first worm wheel (201) is rotatably connected to one of the slide tubes (101). A first slide rod (202) is meshed on the first worm wheel (201). A welding head (203) is fixedly connected to the upper end of the first slide rod (202).

2. The welding system according to claim 1, characterized in that: A second worm wheel (204) is meshed on the worm (12), and the second worm wheel (204) is rotatably connected to another slide tube (101). A second slide rod (205) is meshed on the second worm wheel (204), and a grinding wheel (206) is rotatably connected to the upper end of the second slide rod (205).

3. The welding system according to claim 1, characterized in that: A movable frame (13) is rotatably connected to the worm (12). A first motor (305) is fixedly connected to the front end of the movable frame (13). The output shaft of the first motor (305) is fixedly connected to the rotating shaft (11). A second motor (306) is fixedly connected to the rear end of the movable frame (13). The output shaft of the second motor (306) is fixedly connected to the worm (12).

4. A welding system according to claim 3, characterized in that: The movable frame (13) has four rods (301) fixedly connected to its front and rear ends. Each rod (301) has a wheel seat (302) slidably connected to it. Each wheel seat (302) is fixedly connected to the movable frame (13) with a first compression spring (303). Each wheel seat (302) has a rubber wheel (304) rotatably connected to it.

5. A welding system according to claim 4, characterized in that: A fixed frame (14) is slidably connected to the movable frame (13). A hydraulic rod (401) is fixed to both ends of the fixed frame (14), and a rubber block (402) is fixed to the moving end of each hydraulic rod (401).

6. A welding system according to claim 5, characterized in that: Two sliders (15) are slidably connected to the fixed frame (14). Each slider (15) is slidably connected to a pressure roller seat (501). Each pressure roller seat (501) is fixed to the corresponding slider (15) with a second pressure spring (502). Each pressure roller seat (501) is rotatably connected to a pressure roller (503).

7. A welding system according to claim 6, characterized in that: A limiting plate (403) is fixedly connected to the fixing frame (14), and the limiting plate (403) is in contact with the pressure roller seat (501).

8. A welding system according to claim 6, characterized in that: A lead screw (404) is rotatably connected to the fixed frame (14), and the lead screw (404) and two sliders (15) are threadedly connected.

9. A welding system according to claim 6, characterized in that: A rack (405) is slidably connected to the fixed frame (14), each pressure roller seat (501) is slidably connected to the rack (405), and a gear (504) is fixedly connected to one end of each pressure roller (503), and each gear (504) is meshed with the rack (405).

10. A welding method according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: Place the device in the pipe and drive the rubber wheel (304) to rotate until the pressure roller (503) is located at the damaged part of the pipe; Step 2: Extend the hydraulic rod (401) while simultaneously rotating the lead screw (404); Step 3: Drive the second motor (306) to rotate forward, and then cooperate with the drive rubber wheel (304), the first motor (305) and the grinding wheel (206) to rotate; Step 4: Drive the second motor (306) to reverse, and then start the welding head (203) to drive the rubber wheel (304) and the first motor (305) to rotate.

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