Annular high-alloy surfacing welding device and welding process for super-large container

Abstract

The invention relates to the field of welding of inner walls of chemical containers, in particular to an annular high-alloy surfacing device and a welding process for a super-large container, which comprises a stand column, a cross arm is slidably connected to the side wall of the stand column, and a strip surfacing mechanism is arranged at the end of the cross arm and is used for surfacing a corrosion-resistant layer on the inner wall of a barrel; and the reciprocating linear driving mechanism is used for driving the cross arm to do reciprocating linear movement. By arranging the magnetic railing ruler and the reading head, the controller starts the reciprocating linear driving mechanism to drive the cross arm to move, so that the cross arm moves towards the stopping position, the difference value between the current position coordinate fed back by the reading head and the stopping position coordinate is compared in real time, and when the difference value is smaller than the specified threshold value, the reciprocating linear driving mechanism is controlled to be closed; therefore, the strip surfacing mechanism can move and recover to the non-welding position, and the problem of overlaying overlapping or welding shortage of the inner wall of the barrel can be avoided.

Description

Technical Field

[0001] The present invention relates to the field of inner wall welding of chemical containers, and particularly to a circumferential high-alloy surfacing device and welding process for an oversized container. Background Art

[0002] In recent years, with the gradual expansion of the production scale and the progress of technology in the chemical industry, the requirements for chemical equipment media have become increasingly stringent. In order to improve the corrosion resistance of the inner wall of chemical containers, during the manufacturing process of chemical containers, it is necessary to surfacing a corrosion-resistant layer of C276 on the inner wall of the container through a strip surfacing device.

[0003] However, during the surfacing process of the strip surfacing device on the inner wall of the container, the strip in the strip surfacing device will continue to be consumed. When the strip is consumed, it is necessary to stop the strip surfacing device and withdraw it from the container interior, replace the new strip, and then move the strip surfacing device to the stop position to continue surfacing;

[0004] Due to the long length of the container and the fact that the stop positions of the equipment are often different each time the strip is consumed, during the long-distance movement of the strip surfacing device, it is easy to cause positional deviation, increasing the difficulty of moving the strip surfacing device back to the stop position.

[0005] Therefore, the present invention proposes a circumferential high-alloy surfacing device and welding process for an oversized container to solve the above problems. Summary of the Invention

[0006] To achieve the above object, the technical solution adopted by the present invention is: A circumferential high-alloy surfacing device for an oversized container, comprising:

[0007] A column, a cross arm is slidably connected to the side wall of the column, and a strip surfacing mechanism is arranged at the end of the cross arm, and the strip surfacing mechanism is used for surfacing a corrosion-resistant layer on the inner wall of the cylinder;

[0008] A reciprocating linear driving mechanism, which is used to drive the cross arm to perform reciprocating linear movement;

[0009] A magnetic scale, which is laid on the top of the cross arm;

[0010] A reading head, which is arranged on the column and is used to read the position information of the magnetic scale in real time and record the stop position information when the strip surfacing mechanism stops;

[0011] A controller, which controls the reciprocating linear driving mechanism to drive the cross arm to move to the target position and compares the difference between the current position information fed back by the reading head and the stop position information in real time. When the difference is less than the specified threshold, it controls the reciprocating linear driving mechanism to close;

[0012] Specifically, in the prior art, the positions where the equipment stops each time the electrode strip is consumed are often different. During the long-distance movement of the strip electrode surfacing equipment, it is easy to cause positional deviations, increasing the difficulty of moving the strip electrode surfacing equipment back to the stop position. This technical solution can solve the above problems, and the specific operations are as follows:

[0013] First, place the cylinder body on two roller racks. Then, start the reciprocating linear drive mechanism to make the cross arm drive the strip electrode surfacing mechanism into the inner wall of the cylinder body. When the strip electrode surfacing mechanism enters the specified position on the inner wall of the cylinder body, start the strip electrode surfacing mechanism and simultaneously turn on the reduction motors on the roller racks to make the rollers on the roller racks rotate, and start surfacing the cylinder body;

[0014] If the electrode strip in the strip electrode surfacing mechanism is consumed during the surfacing process, the controller turns off the strip electrode surfacing mechanism. At the same time, the reading head records the value on the current magnetic grating scale as the stop position information and sends the stop position information to the controller;

[0015] Then, the controller controls the reciprocating linear drive mechanism to make the cross arm drive the strip electrode surfacing mechanism out of the cylinder body, replace the new electrode strip. After replacing the electrode strip, the controller starts the reciprocating linear drive mechanism to drive the cross arm to move, making the cross arm move towards the stop position, and continuously compares the difference between the current position coordinates fed back by the reading head and the stop position coordinates. When the difference is less than the specified threshold, the reciprocating linear drive mechanism is controlled to turn off, which is beneficial to making the strip electrode surfacing mechanism move back to the unwelded position and avoiding the problems of overlapping or missing surfacing on the inner wall of the cylinder body.

[0016] Preferably, it further includes:

[0017] A driving block, which is vertically slidably connected to the side wall of the column and is connected to the lifting adjustment mechanism on the column. The cross arm is slidably connected to the driving block, and the reading head is arranged on the side wall of the driving block.

[0018] Preferably, the reciprocating linear drive mechanism includes:

[0019] A first rack, which is fixedly connected to the side wall of the cross arm;

[0020] A first gear, which is rotatably connected to the side wall of the driving block and meshes with the first rack;

[0021] A high-speed adjustment motor, which is used to drive the first gear to rotate.

[0022] Preferably, it further includes:

[0023] A second rack, which is fixedly connected to the side wall of the cross arm;

[0024] A second gear, which is rotatably connected to the side wall of the driving block, meshes with a second rack. The first gear and the second gear have the same radius, and the number of teeth of the first gear is less than that of the second gear;

[0025] A low-speed adjustment motor, which is used to drive the second gear to rotate.

[0026] Preferably, the strip surfacing mechanism includes:

[0027] A mounting frame, which is fixed to the end of the cross arm, and is fixedly connected with a machine shell;

[0028] A first insulating block, which is fixed inside the machine shell;

[0029] A second insulating block, which is slidably connected to the inner wall of the machine shell, and a first spring is fixedly connected between the second insulating block and the inner wall of the machine shell;

[0030] A first pushing block, the end of which is provided with a first inclined surface, and the first pushing block is fixedly connected to the side wall of the second insulating block;

[0031] A machine cover, which is fixed to the machine shell by bolts, and a second pushing block adapted to the first pushing block is fixedly connected to the side wall of the machine cover.

[0032] Preferably, electrode rollers are rotatably connected to the inner bottom walls of the first insulating block and the second insulating block, and the electrode rollers are used to heat the strip electrode;

[0033] Several conveying rollers, which are respectively rotatably connected to the side walls of the first insulating block and the second insulating block in an array.

[0034] Preferably, it further includes:

[0035] A winding roller, which is rotatably connected inside the machine shell, and the strip electrode is wound around the winding roller;

[0036] A feeding hopper, which is fixed to the outer wall of the machine shell, a feeding pipe is fixedly connected to the top end of the feeding hopper, and a sealing plate is slidably connected to the inner wall of the top end of the feeding hopper for sealing the pipe orifice of the feeding pipe;

[0037] A laser distance sensor, which real-time detects the outer diameter parameter of the winding roller. When the outer diameter parameter of the winding roller is lower than the threshold value, the controller turns off the electrode roller and controls the sealing plate to slide to seal the end of the feeding pipe.

[0038] Since the corrosion resistance of C276 will be significantly reduced after heat treatment at over 520 °C, the C276 layer cannot participate in the subsequent heat treatment with the cylinder body. To solve the above problems, the present invention also provides a circumferential high-alloy welding process for an oversized container, including the following steps:

[0039] S1: Surfacing the corrosion-resistant layer of C276 material on the inner walls of the left and right head components respectively, leaving a 550-mm-wide heat-insulating zone at the head ports without surfacing C276.

[0040] S2: Surfacing the corrosion-resistant layer of C276 material on the inner wall of the cylinder body, leaving a 550-mm-wide heat-insulating zone at each of the two ends without surfacing C276.

[0041] S3: Welding the left and right head components to the left and right ends of the cylinder body.

[0042] S4: Performing post-weld stress relief heat treatment on the circumferential welds of the left and right head components and the cylinder body by means of intermediate frequency induction heating.

[0043] S5: Surfacing the corrosion-resistant layer of C276 material on the areas where C276 was not surfaced after welding the left and right head components of the cylinder body and the cylinder body.

[0044] By setting the heat-insulating zone, the influence on the C276 corrosion-resistant layer during post-weld stress relief heat treatment of the circumferential welds of the left and right head components and the cylinder body is reduced, avoiding the problem that the corrosion resistance of C276 will be significantly reduced after heat treatment.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] First, by setting the magnetic grating ruler and the reading head, the controller starts the reciprocating linear drive mechanism to drive the cross arm to move, so that the cross arm moves towards the stop position, and the difference between the current position coordinates fed back by the reading head and the stop position coordinates is compared in real time. When the difference is less than the specified threshold, the reciprocating linear drive mechanism is controlled to close, which is beneficial to moving the strip surfacing mechanism back to the non-welded position, and is beneficial to avoiding the problems of overlapping or lack of surfacing on the inner wall of the cylinder body.

[0047] Second, by setting the high-speed adjustment motor and the low-speed adjustment motor, after starting the high-speed adjustment motor and replacing the strip electrode, first start the high-speed adjustment motor to make the output shaft of the high-speed adjustment motor rotate forward, so that the cross arm drives the strip surfacing mechanism into the cylinder body. The controller compares the difference between the current position information fed back by the reading head and the stop position information in real time. When the difference is less than the specified value, first turn off the high-speed adjustment motor, and then start the low-speed adjustment motor to make the second gear rotate forward, thereby completing the precision adjustment and moving the strip surfacing mechanism back to the non-welded position, which is beneficial to avoiding the problems of overlapping or lack of surfacing on the inner wall of the cylinder body.

[0048] III. By providing a laser distance sensor and a sealing plate, the present invention can detect the outer diameter parameter of the roll in real time through the laser distance sensor. When the outer diameter parameter of the roll is lower than the threshold value, the controller shuts down the electrode roll and the flux conveying mechanism, starts the reciprocating linear driving mechanism, and simultaneously controls the sealing plate to seal the end of the feeding pipe, avoiding the remaining flux in the feeding pipe from falling, and reducing the waste of flux. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 Schematic diagram of the overall structure of the surfacing device of the present invention Figure 1 ;

[0050] Figure 2 Schematic diagram of the overall structure of the surfacing device of the present invention Figure 2 ;

[0051] Figure 3 Schematic diagram of the connection between the cross arm and the mounting bracket in the present invention;

[0052] Figure 4 Schematic diagram of the connection between the cross arm and the driving block in the present invention;

[0053] Figure 5 Schematic diagram of the connection between the machine housing and the roll in the present invention;

[0054] Figure 6 Schematic diagram of the connection between the second insulating block and the electrode roll in the present invention;

[0055] Figure 7 Cross-sectional view of the feeding hopper in the present invention;

[0056] Figure 8 Schematic diagram of the connection between the driving block and the reading head in the present invention;

[0057] Figure 9 Schematic diagram of the connection between the machine cover and the second pushing block in the present invention;

[0058] Figure 10 Flow chart of the welding process in the present invention.

[0059] In the figures: roller stand 1, cylinder body 2, column 3, cross arm 4, magnetic grating ruler 5, reading head 6, controller 7, driving block 8, lifting adjustment mechanism 9, first rack 10, first gear 11, high-speed adjustment motor 12, second rack 13, second gear 14, low-speed adjustment motor 15, mounting bracket 16, machine housing 17, first insulating block 18, second insulating block 19, first spring 20, first pushing block 21, machine cover 22, second pushing block 23, electrode roll 24, conveying roll 25, roll 26, pole strip 27, feeding hopper 28, feeding pipe 29, sealing plate 30, laser distance sensor 31, flux conveying mechanism 32, first electromagnet 33, second electromagnet 34, second spring 35. DETAILED DESCRIPTION OF THE INVENTION

[0060] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and other obvious variations can be conceived by those skilled in the art.

[0061] As Figures 1 to 9 shown, a circumferential high-alloy surfacing device for an extra-large container includes:

[0062] A column 3, a cross arm 4 is slidably connected to the side wall of the column 3, and a strip surfacing mechanism is arranged at the end of the cross arm 4, and the strip surfacing mechanism is used for surfacing a corrosion-resistant layer on the inner wall of the cylinder 2;

[0063] A reciprocating linear drive mechanism, which is used to drive the cross arm 4 to perform reciprocating linear movement;

[0064] A magnetic grating scale 5, which is laid on the top of the cross arm 4;

[0065] A reading head 6, which is arranged on the column 3, is used to read the position information of the magnetic grating scale 5 in real time, and record the stop position information when the strip surfacing mechanism stops; the model of the reading head 6 can be selected from the LIDA 400 series, and is matched with the LC series magnetic grating scale 5;

[0066] A controller 7, the controller 7 controls the reciprocating linear drive mechanism to drive the cross arm 4 to move to the target position, and compares the difference between the current position information fed back by the reading head 6 and the stop position information in real time. When the difference is less than the specified threshold, the controller 7 controls the reciprocating linear drive mechanism to close; wherein, the model of the controller 7 is Siemens S7-1500.

[0067] Specifically, in the prior art, the stop positions of the equipment are often different each time the strip 27 is consumed, which makes it easy to cause position deviation during the long-distance movement of the strip surfacing equipment, increasing the difficulty of moving the strip surfacing equipment back to the stop position. This technical solution can solve the above problems, and the specific operation is as follows:

[0068] First, place the cylinder 2 on two roller racks 1, then start the reciprocating linear drive mechanism, so that the cross arm 4 drives the strip surfacing mechanism into the inner wall of the cylinder 2. When the strip surfacing mechanism enters the specified position on the inner wall of the cylinder 2, start the strip surfacing mechanism, and synchronously start the reduction motor on the roller rack 1, so that the rollers on the roller rack 1 rotate, and start surfacing the cylinder 2;

[0069] If during the surfacing process, when the strip 27 in the strip surfacing mechanism is consumed, the controller 7 turns off the strip surfacing mechanism, and at the same time records the value on the current magnetic grating scale 5 through the reading head 6 as the stop position information, and sends the stop position information to the controller 7;

[0070] Next, the controller 7 controls the reciprocating linear drive mechanism, causing the cross arm 4 to drive the strip electrode surfacing mechanism to be pushed out of the cylinder body 2. After replacing the new strip electrode 27, the controller 7 activates the reciprocating linear drive mechanism to drive the cross arm 4 to move, causing the cross arm 4 to move towards the stop position, and continuously comparing the difference between the current position coordinates fed back by the reading head 6 and the stop position coordinates. When the difference is less than the specified threshold, the reciprocating linear drive mechanism is controlled to close, which is beneficial to moving the strip electrode surfacing mechanism back to the non-welded position, and is beneficial to avoiding the problems of overlapping or lack of surfacing on the inner wall of the cylinder body 2.

[0071] As a further embodiment of the present invention, it further includes:

[0072] A driving block 8, which is vertically slidably connected to the side wall of the column 3 and is connected to the lifting adjustment mechanism 9 on the column 3. The cross arm 4 is slidably connected inside the driving block 8, and the reading head 6 is arranged on the side wall of the driving block 8;

[0073] The lifting adjustment mechanism 9 is driven by a motor to drive a worm and gear reducer and a sprocket and chain. One end of the chain is connected to the driving block 8, and the other end is fixed to the balance weight inside the column 3;

[0074] Specifically, after the cross arm 4 drives the strip electrode surfacing mechanism into the cylinder body 2, through the lifting adjustment mechanism 9, the driving block 8 is driven to move downward, causing the cross arm 4 to drive the strip electrode surfacing mechanism to move downward, so that the bottom end of the strip electrode 27 contacts the inner wall of the cylinder body 2. Subsequently, the strip electrode surfacing mechanism is started to start surfacing the inner wall of the cylinder body 2;

[0075] If the strip electrode 27 is consumed or the surfacing of the inner wall of the cylinder body 2 is completed, first turn off the strip electrode surfacing mechanism, and then through the lifting adjustment mechanism 9, make the cross arm 4 drive the strip electrode surfacing mechanism to move upward, so that the bottom end of the strip electrode 27 is far away from the inner wall of the cylinder body 2. Then, through the reciprocating linear drive mechanism, make the cross arm 4 drive the strip electrode surfacing mechanism to withdraw from the cylinder body 2.

[0076] As a further embodiment of the present invention, the reciprocating linear drive mechanism includes:

[0077] A first rack 10, which is fixedly connected to the side wall of the cross arm 4;

[0078] A first gear 11, which is rotatably connected to the side wall of the driving block 8, and the first gear 11 meshes with the first rack 10;

[0079] A high-speed adjustment motor 12, which is used to drive the first gear 11 to rotate, and the high-speed adjustment motor 12 is fixed on the driving block 8;

[0080] It further includes:

[0081] A second rack 13, which is fixedly connected to the side wall of the cross arm 4;

[0082] A second gear 14 is rotatably connected to the side wall of the driving block 8. The second gear 14 meshes with the second rack 13. The first gear 11 and the second gear 14 have the same radius, and the number of teeth of the first gear 11 is less than that of the second gear 14.

[0083] A low-speed adjustment motor 15 is used to drive the rotation of the second gear 14. The low-speed adjustment motor 15 is fixed on the driving block 8. It should be noted that both the high-speed adjustment motor 12 and the low-speed adjustment motor 15 are non-self-locking motors to avoid jamming the cross arm 4.

[0084] Specifically, when surfacing the inner wall of the cylinder body 2 is required, by setting the high-speed adjustment motor 12 and the low-speed adjustment motor 15, by starting the high-speed adjustment motor 12, the output shaft of the high-speed adjustment motor 12 rotates forward, causing the first gear 11 to rotate forward. Through the meshing of the first gear 11 and the first rack 10, the first rack 10 moves horizontally, causing the cross arm 4 to drive the strip surfacing mechanism into the cylinder body 2, and then start surfacing the inner wall of the cylinder body 2.

[0085] When the strip electrode 27 is consumed, the output shaft of the high-speed adjustment motor 12 rotates in the reverse direction, causing the first gear 11 to rotate in the reverse direction, so that the strip surfacing mechanism exits from the cylinder body 2.

[0086] After replacing the strip electrode 27, first start the high-speed adjustment motor 12 to make the output shaft of the high-speed adjustment motor 12 rotate forward, so that the cross arm 4 drives the strip surfacing mechanism into the cylinder body 2. The controller 7 compares the difference between the current position information fed back by the reading head 6 and the stop position information in real time. When the difference is less than the specified value (the specified value is greater than the threshold, for example, the specified value is 100 mm and the threshold is 1 mm), first turn off the high-speed adjustment motor 12, and then start the low-speed adjustment motor 15 to make the second gear 14 rotate forward, thereby completing the precision adjustment and making the strip surfacing mechanism move back to the un-welded position, which helps to avoid the problems of overlapping or missing surfacing on the inner wall of the cylinder body 2.

[0087] As a further embodiment of the present invention, the strip surfacing mechanism includes:

[0088] A mounting frame 16 is fixed to the end of the cross arm 4, and the mounting frame 16 is fixedly connected to the machine housing 17.

[0089] A first insulating block 18 is fixed inside the machine housing 17.

[0090] A second insulating block 19 is slidably connected to the inner wall of the machine housing 17, and a first spring 20 is fixedly connected between the second insulating block 19 and the inner wall of the machine housing 17.

[0091] The first pushing block 21 has a first inclined surface at its end, and the first pushing block 21 is fixedly connected to the side wall of the second insulating block 19;

[0092] The machine cover 22 is fixed to the machine shell 17 by bolts, and a second pushing block 23 adapted to the first pushing block 21 is fixedly connected to the side wall of the machine cover 22;

[0093] Specifically, if the pole strip 27 is consumed and withdrawn from the cylinder body 2, the machine cover 22 is removed, so that the second pushing block 23 cancels the push on the first pushing block 21. Under the action of the first spring 20, the second insulating block 19 is moved away from the pole strip 27, facilitating the removal of the remaining pole strip 27;

[0094] After replacing the new pole strip 27, the machine cover 22 is fixed to the machine shell 17. The second pushing block 23 pushes the first pushing block 21, causing the second insulating block 19 to approach the pole strip 27 and positioning the pole strip 27 to prevent deformation of the pole strip 27.

[0095] As a further embodiment of the present invention, electrode rollers 24 are rotatably connected to the inner walls of the bottoms of the first insulating block 18 and the second insulating block 19. The electrode rollers 24 are used to heat the pole strip 27;

[0096] Several conveying rollers 25 are respectively rotatably connected to the side walls of the first insulating block 18 and the second insulating block 19 in an array;

[0097] Specifically, during the surfacing process, by driving two motors located on the first insulating block 18 and the second insulating block 19, the conveying rollers 25 are rotated to convey the pole strip 27 downward and heat it through the electrode rollers 24, thereby performing surfacing on the inner wall of the cylinder body 2.

[0098] As a further embodiment of the present invention, it further includes:

[0099] A winding roller 26 is rotatably connected inside the machine shell 17, and the pole strip 27 is wound around the winding roller 26;

[0100] A feeding hopper 28 is fixed to the outer wall of the machine shell 17. A feeding pipe 29 is fixedly connected to the top of the feeding hopper 28. A sealing plate 30 is slidably connected to the inner wall of the top of the feeding hopper 28 for sealing the nozzle of the feeding pipe 29;

[0101] A laser distance sensor 31 real-time detects the outer diameter parameter of the winding roller 26. When the outer diameter parameter of the winding roller 26 is lower than the threshold, the controller 7 turns off the electrode roller 24 and controls the sealing plate 30 to slide to seal the end of the feeding pipe 29;

[0102] One end of the feeding pipe 29 away from the feeding hopper 28 is connected to the flux conveying mechanism 32. It should be noted that in order to improve the simplicity of the drawing, the connecting pipeline is not drawn in the figure.

[0103] Specifically, during the surfacing process, the outer diameter parameter of the roll 26 is detected in real time by the laser distance sensor 31. When the outer diameter parameter of the roll 26 is lower than the threshold value, the controller 7 closes the electrode roll 24 and the flux conveying mechanism 32, and starts the reciprocating linear driving mechanism. At the same time, the sealing plate 30 is controlled to seal the end of the feeding pipe 29, avoiding the remaining flux in the feeding pipe 29 from falling, and reducing the waste of flux.

[0104] As a further embodiment of the present invention, a first electromagnet 33 is fixedly connected to the side wall of the sealing plate 30, and a second electromagnet 34 is fixedly connected to the inner wall of the top end of the feeding hopper 28. When the first electromagnet 33 and the second electromagnet 34 are energized, the same magnetic force is generated, and a second spring 35 is fixedly connected between the first electromagnet 33 and the second electromagnet 34;

[0105] When the outer diameter parameter of the roll 26 is lower than the threshold value, the controller 7 cancels the current on the first electromagnet 33 and the second electromagnet 34. Under the action of the second spring 35, the sealing plate 30 moves to seal the end of the feeding pipe 29, avoiding the remaining flux in the feeding pipe 29 from falling, and reducing the waste of the welding machine.

[0106] Since the corrosion resistance of C276 will be significantly reduced after heat treatment above 520 °C, the C276 layer cannot participate in the subsequent heat treatment with the cylinder 2. As Figure 10 shown, to solve the above problems, the present invention also provides a circumferential high-alloy welding process for an oversized container, including the following steps:

[0107] S1: Surfacing the inner walls of the left and right head components with the corrosion-resistant layer C276 material, and leaving a heat-insulating zone of 550 mm range at the head ports without surfacing C276;

[0108] S2: Surfacing the inner wall of the cylinder 2 with the corrosion-resistant layer C276 material, and leaving a heat-insulating zone of 550 mm range at both ends without surfacing C276;

[0109] S3: Welding the left and right head components to the left and right ends of the cylinder 2; it should be noted that in this step, the left and right head components and the two ends of the cylinder 2 are welded by argon arc welding with a welding torch;

[0110] S4: Performing post-weld stress relief heat treatment on the circumferential seams of the left and right head components and the cylinder 2 by means of intermediate frequency induction heating;

[0111] S5: After welding the left and right head components of the cylinder body 2 and the cylinder body 2, weld the corrosion-resistant layer of C276 material on the area where C276 has not been surfacing welded; it should be noted that in this step, the corrosion-resistant layer of C276 material is welded on the area where C276 has not been surfacing welded after welding the left and right head components of the cylinder body 2 and the cylinder body 2 by a laser surfacing welding device;

[0112] By setting the heat insulation belt, when stress relief heat treatment is carried out on the circumferential weld of the left and right head components and the cylinder body 2, the influence on the C276 corrosion-resistant layer is reduced, and the problem that the corrosion resistance of C276 will be significantly reduced after heat treatment is avoided.

[0113] The working principle of the present invention: First, place the cylinder body 2 on two roller racks 1, then start the reciprocating linear drive mechanism, so that the cross arm 4 drives the strip surfacing welding mechanism into the inner wall of the cylinder body 2. When the strip surfacing welding mechanism enters the specified position on the inner wall of the cylinder body 2, start the strip surfacing welding mechanism, and synchronously start the reduction motor on the roller rack 1, so that the rollers on the roller rack 1 rotate, and start surfacing welding the cylinder body 2;

[0114] If during the surfacing welding process, when the strip 27 in the strip surfacing welding mechanism is consumed, the controller 7 closes the strip surfacing welding mechanism, and at the same time records the value on the current magnetic grating ruler 5 through the reading head 6 as the shutdown position information, and sends the shutdown position information to the controller 7;

[0115] Then the controller 7 controls the reciprocating linear drive mechanism, so that the cross arm 4 drives the strip surfacing welding mechanism to be pushed out of the cylinder body 2, replaces the new strip 27. After completing the replacement of the strip 27, the controller 7 starts the reciprocating linear drive mechanism to drive the cross arm 4 to move, so that the cross arm 4 moves towards the shutdown position, and the difference between the current position coordinates fed back by the reading head 6 and the shutdown position coordinates is compared in real time. When the difference is less than the specified threshold, the reciprocating linear drive mechanism is controlled to close, which is beneficial to making the strip surfacing welding mechanism move back to the unwelded position, and is beneficial to avoiding the problems of overlapping or lack of welding on the inner wall of the cylinder body 2.

[0116] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A circumferential high-alloy surfacing device for an extra-large container, characterized in that Comprising: A vertical column (3), on the side wall of which a cross arm (4) is slidably connected. A strip electrode surfacing mechanism is arranged at the end of the cross arm (4), and the strip electrode surfacing mechanism is used for surfacing a corrosion-resistant layer on the inner wall of the cylinder body (2); A reciprocating linear driving mechanism, which is used for driving the cross arm (4) to perform reciprocating linear movement; A magnetic grating ruler (5), which is laid on the top of the cross arm (4); A reading head (6), which is arranged on the vertical column (3) and is used for reading the position information of the magnetic grating ruler (5) in real time and recording the stop position information when the strip electrode surfacing mechanism stops; A controller (7), which controls the reciprocating linear driving mechanism to drive the cross arm (4) to move to the target position and compares the difference between the current position information fed back by the reading head (6) and the stop position information in real time. When the difference is less than the specified threshold, it controls the reciprocating linear driving mechanism to close.

2. The circumferential high-alloy surfacing device for an extra-large container according to claim 1, characterized in that, Also comprising: A driving block (8), which is vertically slidably connected to the side wall of the vertical column (3) and is connected to the lifting and adjusting mechanism (9) on the vertical column (3). The cross arm (4) is slidably connected in the driving block (8), and the reading head (6) is arranged on the side wall of the driving block (8).

3. The circumferential high-alloy surfacing device for an extra-large container according to claim 2, characterized in that, The reciprocating linear driving mechanism comprises: A first rack (10), which is fixedly connected to the side wall of the cross arm (4); A first gear (11), which is rotatably connected to the side wall of the driving block (8), and the first gear (11) meshes with the first rack (10); A high-speed adjusting motor (12), which is used for driving the first gear (11) to rotate.

4. A circumferential high-alloy surfacing device for an oversized container according to claim 3, characterized in that, Also comprising: A second rack (13), which is fixedly connected to the side wall of the cross arm (4); A second gear (14), which is rotatably connected to the side wall of the driving block (8), and the second gear (14) meshes with the second rack (13). The first gear (11) and the second gear (14) have the same radius, and the number of teeth of the first gear (11) is less than that of the second gear (14); A low-speed adjusting motor (15), which is used for driving the second gear (14) to rotate.

5. The circumferential high-alloy surfacing device for an extra-large container according to claim 1, characterized in that, The strip electrode surfacing mechanism comprises: A mounting frame (16), which is fixed to the end of the cross arm (4), and the mounting frame (16) is fixedly connected to a machine shell (17); A first insulating block (18), which is fixed in the machine shell (17); A second insulating block (19), which is slidably connected to the inner wall of the machine shell (17), and a first spring (20) is fixedly connected between the second insulating block (19) and the inner wall of the machine shell (17); A first pushing block (21), at the end of which a first inclined surface is provided, and the first pushing block (21) is fixedly connected to the side wall of the second insulating block (19); The machine cover (22), the machine cover (22) is fixed on the machine shell (17) by bolts, and a second push block (23) adapted to the first push block (21) is fixedly connected to the side wall of the machine cover (22).

6. The circumferential high-alloy surfacing device for an extra-large container according to claim 5, characterized in that, The inner walls of the bottom ends of the first insulating block (18) and the second insulating block (19) are both rotatably connected with electrode rollers (24), and the electrode rollers (24) are used for heating the pole belt (27); A plurality of conveying rollers (25), and the plurality of conveying rollers (25) are respectively rotationally connected to the side walls of the first insulating block (18) and the second insulating block (19) in an array.

7. The circumferential high-alloy surfacing device for an extra-large container according to claim 5, characterized in that, It further includes: A winding roller (26), the winding roller (26) is rotationally connected inside the machine shell (17), and the pole belt (27) is wound around the winding roller (26); A feeding hopper (28), the feeding hopper (28) is fixed on the outer wall of the machine shell (17), a feeding pipe (29) is fixedly connected to the top end of the feeding hopper (28), and a sealing plate (30) is slidably connected to the inner wall of the top end of the feeding hopper (28) for sealing the pipe orifice of the feeding pipe (29); A laser distance measuring sensor (31), the laser distance measuring sensor (31) detects the outer diameter parameter of the winding roller (26) in real time. When the outer diameter parameter of the winding roller (26) is lower than the threshold value, the controller (7) turns off the electrode roller (24) and controls the sealing plate (30) to slide to seal the end of the feeding pipe (29).

8. A welding process for the circumferential high-alloy surfacing device of the ultra-large container according to claim 7, characterized in that, It includes: S1: Weld the corrosion-resistant layer C276 material on the inner walls of the left and right head components respectively, and leave a range of 550 mm at the head port without welding C276; S2: Weld the corrosion-resistant layer C276 material on the inner wall of the cylinder body (2), and leave a range of 550 mm at each end without welding C276.

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