A special welding equipment for heat-insulating oil casing pipes with internal pipe connection

Abstract

The present invention relates to the technical field of pipe welding, and discloses a special welding device for an inner pipe connection type heat-insulating oil casing pipe, which includes a welding table. A pipe clamping mechanism is arranged on the top of the welding table, and the pipe clamping mechanism includes two rotating rings. During use, in the processing of oil pipes, first connect two oil pipes through the fixed rings. The electric telescopic rod drives the V-shaped clamping plate to clamp the oil pipe, and the driving motor enables the support rollers to support the oil pipe through gears and lead screws. The adjusting motor cooperates with relevant structures to make the grinding wheel and the arc-shaped grinding piece fit oil pipes of different diameters. The grinding motor and the rotating motor work together to comprehensively grind the oil pipe. During welding, the oil pipe rotates at a constant speed to achieve uniform welding. After welding, the grinding wheel and the arc-shaped grinding piece clean the weld seam. In addition, during the grinding process of the device, through the transmission of gears and chains, a cleaning brush is driven to clean the grinding components, ensuring the grinding and welding quality and improving the processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe welding, and more particularly to a special welding device for an inner pipe-connected heat-insulating oil casing. Background Art

[0002] The heat-insulating oil casing is an important equipment used in the process of steam injection for heavy oil wells. Its purpose is to serve as a steam injection channel to inject high-temperature and high-pressure steam into the well, protect the oil well casing and the cement sheath of the well from thermal stress damage, reduce the thermal loss in the wellbore, and improve the steam injection and oil production effect.

[0003] Before welding the heat-insulating oil casing, it is necessary to grind the welding position to prevent impurities such as oil stains, rust, burrs, and scale from interfering during welding and affecting the welding quality. At the same time, it is also necessary to clean the weld in time after welding to prevent corrosion and other phenomena from occurring during subsequent use and affecting the service performance. In the prior art, usually the surface of the oil pipe is ground and the weld is cleaned by workers. Not only the grinding and cleaning effects are poor, but there is a certain height difference at the pipe connection position, resulting in cleaning dead corners and making it inconvenient to carry out the cleaning operation. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a special welding device for an inner pipe-connected heat-insulating oil casing to solve the problems existing in the above-mentioned background art.

[0005] The present invention provides the following technical solution: a special welding device for an inner pipe-connected heat-insulating oil casing, including a welding table. A pipe clamping mechanism is arranged on the top of the welding table. The pipe clamping mechanism includes two rotating rings. The two rotating rings are symmetrically arranged above the welding table and are connected to a rotating component. Three mounting grooves are respectively formed in the inner walls of the circumferences of the two rotating rings. Electric telescopic rods are fixedly installed in the six mounting grooves. V-shaped clamping plates are fixedly installed at the output ends of the six electric telescopic rods. A U-shaped top plate is fixedly installed on the top of the welding table. A rectangular mounting plate and a U-shaped mounting plate are movably installed on the inner wall of the bottom of the U-shaped top plate through an adjusting mechanism. A welding mechanism is arranged on the rectangular mounting plate, and a grinding mechanism is arranged on the U-shaped mounting plate. The welding mechanism and the grinding mechanism are symmetrically arranged. The grinding mechanism includes a grinding wheel. A first rectangular groove is formed in the U-shaped mounting plate. A rotating rod is rotatably installed on the inner wall of the side of the first rectangular groove. The other end of the rotating rod penetrates through the inner wall of the side of the first rectangular groove and is rotatably installed on the inner wall of the side of the U-shaped mounting plate. The grinding wheel is fixedly sleeved on the rotating rod. A grinding motor is fixedly installed on the side of the U-shaped mounting plate. The output shaft of the grinding motor is connected to one end of the rotating rod. A circular plate is fixedly sleeved on the outer wall of the circumference of the rotating rod. The end of the circular plate is fixedly connected to the end of the grinding wheel. A plurality of sliding grooves are formed in the outer wall of the circumference of the circular plate. Limiting shafts are slidably installed in the plurality of sliding grooves. Arc-shaped grinding pieces are fixedly installed at the ends of the plurality of limiting shafts. The plurality of arc-shaped grinding pieces are all connected to a linkage component. A cleaning mechanism is arranged on the side of the U-shaped mounting plate. The cleaning mechanism is used for synchronously cleaning the grinding wheel and the plurality of arc-shaped grinding pieces.

[0006] Preferably, the rotating component includes four support seats. The four support seats are all fixedly installed on the top of the welding table. Two fixed rings are respectively fixedly installed on the four support seats. Annular grooves are respectively formed in the inner walls of the circumferences of the two fixed rings. The two rotating rings are respectively rotatably installed in the two annular grooves. Annular holes are respectively formed in the inner walls of the circumferences of the two annular grooves. First annular racks are fixedly installed on the outer walls of the circumferences of the two rotating rings. Transmission grooves are respectively formed in the sides of two of the support seats. Circular holes are respectively formed in the opposite inner walls of the two transmission grooves. A rotating shaft is rotatably installed in the four circular holes together. A rotating motor is fixedly installed on the side of one of the support seats. The output shaft of the rotating motor is connected to one end of the rotating shaft. Two rotating gears are fixedly sleeved on the outer wall of the circumference of the rotating shaft. The two rotating gears are respectively meshed with the two first annular racks.

[0007] Preferably, a pipe support mechanism is provided on the top of the welding table. The pipe support mechanism includes two square rods. Two square holes are formed in the top of the welding table. The two square rods are respectively slidably installed in the two square holes. Limiting circular plates are fixedly installed at the bottoms of the two square rods. Mounting seats are fixedly installed at the tops of the two square rods. Two circular shafts are rotatably installed on the opposite inner walls of the two mounting seats. The two circular shafts are symmetrically arranged. Support rollers are fixedly sleeved on the outer walls of the circumferences of the two circular shafts. The two square rods are connected by a lifting assembly.

[0008] Preferably, the lifting assembly includes a first bidirectional lead screw. A sliding hole is formed in the top of the welding table. The two ends of the first bidirectional lead screw are respectively rotatably installed on the opposite inner walls of the sliding hole. A motor slot is formed in the side inner wall of the sliding hole. A driving motor is fixedly installed in the motor slot. The output shaft of the driving motor extends into the sliding hole and is fixedly sleeved with a driving bevel gear. A driven bevel gear is fixedly sleeved on the outer wall of the circumference of the first bidirectional lead screw. Two square sliders are threadedly installed on the two first bidirectional lead screws. First connecting rods are rotatably installed at the tops of the two square sliders. The other ends of the two first connecting rods are respectively rotatably installed on the opposite side parts of the two square rods.

[0009] Preferably, the adjusting mechanism includes a rectangular frame. The rectangular frame is fixedly installed on the bottom inner wall of the U-shaped top plate. The opposite inner walls of the rectangular frame jointly rotatably install a second bidirectional lead screw. An adjusting motor is fixedly installed on the side of the rectangular frame. The output shaft of the adjusting motor is connected to one end of the second bidirectional lead screw. Two sliding plates are threadedly installed on the second bidirectional lead screw. The bottoms of the two sliding plates are respectively fixedly connected to the tops of the rectangular mounting plate and the U-shaped mounting plate.

[0010] Preferably, the welding mechanism includes a welding torch. An installation hole is formed in the side of the rectangular mounting plate. The welding torch is fixedly installed in the installation hole. A welding cable is connected to the side of the welding torch. The other end of the welding cable is connected to a power source.

[0011] Preferably, the linkage assembly includes a plurality of arc-shaped blocks. An annular cavity is formed in the grinding wheel. A plurality of sliding holes are formed in the side inner wall of the annular cavity. The plurality of arc-shaped blocks are respectively slidably installed in the plurality of sliding holes. The sides of the plurality of arc-shaped blocks are respectively fixedly connected to the sides of the plurality of arc-shaped grinding sheets. A plurality of circular grooves are formed in both the circumferential inner wall and the circumferential outer wall of the annular cavity. A plurality of screw rods are rotatably installed in the plurality of circular grooves together. The plurality of arc-shaped blocks are respectively threadedly installed on the plurality of screw rods. Linkage bevel gears are fixedly sleeved on the circumferential outer walls of the plurality of screw rods. A circular ring is rotatably installed on the circumferential inner wall of the annular cavity. An annular bevel gear rack is fixedly installed on the side of the circular ring. The annular bevel gear rack is meshed and installed with the plurality of linkage bevel gears. A control unit is arranged on the circumferential outer wall of the circular ring. Arc-shaped grooves are formed on both sides of the plurality of arc-shaped grinding sheets. Arc-shaped limiting rods are fixedly installed on the side inner walls of the plurality of arc-shaped grooves. Arc-shaped connecting plates are slidably installed together on the circumferential outer walls of each pair of adapted arc-shaped limiting rods. The plurality of arc-shaped connecting plates are respectively slidably installed in the plurality of arc-shaped grooves. Grinding sandpapers are arranged on the circumferential outer walls of the plurality of arc-shaped grinding sheets and the circumferential outer wall of the grinding wheel.

[0012] Preferably, the control unit includes an adjusting gear. A mounting shaft is rotatably installed on the side inner wall of the annular cavity. The other end of the mounting shaft penetrates to the outside of the grinding wheel and is fixedly installed with a plum blossom knob. The adjusting gear is fixedly sleeved on the circumferential outer wall of the mounting shaft. A second annular rack is fixedly installed on the circumferential outer wall of the circular ring. The second annular rack is meshed and installed with the adjusting gear. A fixing block is fixedly installed on the circumferential outer wall of the annular cavity. A threaded hole is jointly arranged on the side of the fixing block and the circumferential outer wall of the grinding wheel. A limiting bolt is threadedly installed in the threaded hole. The end of the limiting bolt is in contact with the mounting shaft. An avoidance groove adapted to the limiting bolt is arranged on the circumferential outer wall of the grinding wheel.

[0013] Preferably, the cleaning mechanism includes a cylinder. A U-shaped side plate is fixedly installed on the side of the U-shaped mounting plate. A second rectangular groove is formed on the side of the U-shaped side plate. One end of the cylinder is rotatably installed on the side inner wall of the second rectangular groove. The other end of the cylinder penetrates the side inner wall of the second rectangular groove and is rotatably installed on the side inner wall of the U-shaped side plate. A linkage shaft is rotatably installed on the opposite inner walls of the second rectangular groove. Chain wheels are fixedly sleeved on the circumferential outer walls of the rotating rod and the linkage shaft. A chain is meshed and installed on the two chain wheels together. A driving gear is fixedly sleeved on the circumferential outer wall of the linkage shaft. A driven gear is fixedly sleeved on the circumferential outer wall of the cylinder. The driven gear is meshed and installed with the driving gear.

[0014] Preferably, the cleaning mechanism further includes a plurality of first cleaning brushes and a plurality of second cleaning brushes. A fixed sleeve is fixedly sleeved on the outer wall of the circumferential side of the cylinder. A plurality of the first cleaning brushes are fixedly installed on the outer wall of the circumferential side of the fixed sleeve. A plurality of the first cleaning brushes are all attached to the outer wall of the circumferential side of the grinding wheel. A third bidirectional lead screw is rotatably installed on the inner wall of the end of the cylinder. The other end of the third bidirectional lead screw penetrates outside the U-shaped side plate and is fixedly installed with a knob. Two circular sliding plates are threadedly installed on the third bidirectional lead screw. A plurality of support holes are formed in the inner wall of the circumferential side of the cylinder. A plurality of second connecting rods are rotatably installed at the mutually approaching ends of the two circular sliding plates. The plurality of second connecting rods are respectively movably arranged in the plurality of support holes. The ends of each pair of adapted second connecting rods are jointly rotatably installed with a mounting plate. A plurality of the second cleaning brushes are respectively fixedly installed on the sides of the plurality of mounting plates.

[0015] The beneficial effects of the present invention compared with the prior art are as follows:

[0016] 1. By adjusting structures such as the motor and the bidirectional lead screw, the present invention can make the grinding wheel and the arc-shaped grinding piece respectively fit oil pipes with different diameters. And under the coordinated action of the grinding motor and the rotating motor, the oil pipe can rotate at a constant speed, ensuring that the grinding wheel and the arc-shaped grinding piece comprehensively grind the outer wall of the circumferential side of the oil pipe, avoiding the occurrence of grinding dead angles, greatly improving the grinding efficiency and quality, and ensuring the flatness and smoothness of the surface of the oil pipe.

[0017] 2. In the present invention, when the oil pipe rotates 180 degrees, the welding torch starts to weld the connection. The uniform rotation of the oil pipe ensures the uniformity of welding, effectively improving the welding effect. After welding, the grinding wheel and the arc-shaped grinding piece can timely clean the weld position, preventing subsequent problems such as corrosion, further improving the welding quality, and ensuring the service life and safety of the oil pipe.

[0018] 3. In the present invention, when the grinding wheel and the arc-shaped grinding piece rotate, through the meshing action of the sprocket, the chain, the driving gear and the driven gear, the cylinder is driven to rotate in the reverse direction, so that a plurality of first cleaning brushes and second cleaning brushes rotate synchronously, cleaning the outer walls of the circumferential sides of the grinding wheel and the arc-shaped grinding piece, keeping them always in a good cleaning state, avoiding the influence of impurity residue on the grinding quality, and reducing the equipment maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic structural diagram of a part of the present invention Figure 1 (partially sectioned);

[0021] Figure 3 is Figure 2 the enlarged structural diagram at A in

[0022] Figure 4 Partial structural schematic of the present invention Figure 2 (Partially sectioned);

[0023] Figure 5 is Figure 4 The enlarged structural schematic at position B in

[0024] Figure 6 Structural schematic of the present invention (Partially sectioned);

[0025] Figure 7 Partial structural schematic of the present invention Figure 3 ;

[0026] Figure 8 Partial structural schematic of the present invention Figure 4 (Partially sectioned);

[0027] Figure 9 Partial structural schematic of the present invention Figure 5 (Partially sectioned);

[0028] Figure 10 Partial structural schematic of the present invention Figure 6 (Partially sectioned);

[0029] Figure 11 Partial structural schematic of the present invention Figure 7 (Partially sectioned);

[0030] Figure 12 Partial structural schematic of the present invention Figure 8 ;

[0031] Figure 13 Partial structural schematic of the present invention Figure 9 (Partially sectioned).

[0032] The reference numerals are: 1, welding table; 2, U-shaped top plate; 3, square rod; 4, welding torch; 5, fixing ring; 6, square slider; 7, first double lead screw; 8, driving motor; 9, driving bevel gear; 10, driven bevel gear; 11, first connecting rod; 12, mounting seat; 13, supporting roller; 14, supporting seat; 16, rotating ring; 17, electric telescopic rod; 18, V-shaped clamping plate; 19, rotating shaft; 20, rotating motor; 21, rotating gear; 22, first annular rack; 23, rectangular frame; 24, sliding plate; 25, second double lead screw; 26, adjusting motor; 27, rectangular mounting plate; 28, U-shaped mounting plate; 29, U-shaped side plate; 30, grinding motor; 31, grinding wheel; 32, circular plate; 33, screw; 34, arc-shaped block; 35, ring; 36, annular bevel rack; 37, linkage bevel gear; 38, rotating rod; 39, second annular rack; 40, adjusting gear; 41, plum blossom knob; 42, fixing block; 43, limit bolt; 44, cylinder; 45, sprocket; 46, chain; 47, linkage shaft; 48, driving gear; 49, driven gear; 50, limit shaft; 51, arc-shaped grinding piece; 52, arc-shaped limit rod; 53, arc-shaped connecting plate; 54, grinding sandpaper; 55, fixing sleeve; 56, first cleaning brush; 57, mounting plate; 58, second cleaning brush; 59, third double lead screw; 60, knob; 61, circular sliding plate; 62, second connecting rod. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with specific embodiments. However, those skilled in the art should understand that the detailed description given here in conjunction with the accompanying drawings is for better explanation. The structure of the present invention necessarily goes beyond these limited embodiments, and for some equivalent replacement schemes or common means, no detailed description will be given herein, but they still fall within the protection scope of the present application.

[0034] Figures 1 - 13 This is the best embodiment of the present invention. The following will Figures 1 - 13 further describe the present invention in conjunction with the attached

[0035] A special welding device for an inner pipe-connected heat-insulating oil casing pipe, comprising a welding table 1. A pipe clamping mechanism is arranged on the top of the welding table 1. The pipe clamping mechanism includes two rotating rings 16. The two rotating rings 16 are symmetrically arranged above the welding table 1 and are connected by a rotating component. Three installation grooves are respectively formed in the inner walls of the circumferences of the two rotating rings 16. Electric telescopic rods 17 are fixedly installed in the six installation grooves. V-shaped clamping plates 18 are fixedly installed at the output ends of the six electric telescopic rods 17. A U-shaped top plate 2 is fixedly installed on the top of the welding table 1. A rectangular installation plate 27 and a U-shaped installation plate 28 are movably installed on the bottom inner wall of the U-shaped top plate 2 through an adjusting mechanism. A welding mechanism is arranged on the rectangular installation plate 27, and a grinding mechanism is arranged on the U-shaped installation plate 28. The welding mechanism and the grinding mechanism are symmetrically arranged. The grinding mechanism includes a grinding wheel 31. A first rectangular groove is formed in the U-shaped installation plate 28. A rotating rod 38 is rotatably installed on the side inner wall of the first rectangular groove. The other end of the rotating rod 38 penetrates through the side inner wall of the first rectangular groove and is rotatably installed on the side inner wall of the U-shaped installation plate 28. The grinding wheel 31 is fixedly sleeved on the rotating rod 38. A grinding motor 30 is fixedly installed on the side of the U-shaped installation plate 28. The output shaft of the grinding motor 30 is connected to one end of the rotating rod 38. A circular plate 32 is fixedly sleeved on the circumferential outer wall of the rotating rod 38. The end of the circular plate 32 is fixedly connected to the end of the grinding wheel 31. A plurality of sliding grooves are formed in the circumferential outer wall of the circular plate 32. Limiting shafts 50 are slidably installed in the plurality of sliding grooves. Arc-shaped grinding pieces 51 are fixedly installed at the ends of the plurality of limiting shafts 50. The plurality of arc-shaped grinding pieces 51 are connected by a linkage component. A cleaning mechanism is arranged on the side of the U-shaped installation plate 28. The cleaning mechanism is used for synchronously cleaning the grinding wheel 31 and the plurality of arc-shaped grinding pieces 51.

[0036] Such as Figure 4 And Figure 5As shown, the rotating assembly includes four support seats 14, all of which are fixedly installed on the top of the welding table 1. Two fixing rings 5 are respectively and fixedly installed on the four support seats 14. Annular grooves are formed on the inner walls of the circumferences of the two fixing rings 5. Two rotating rings 16 are respectively rotatably installed in the two annular grooves. Annular holes are formed on the inner walls of the circumferences of the two annular grooves. First annular racks 22 are fixedly installed on the outer walls of the circumferences of the two rotating rings 16. Transmission grooves are formed on the sides of two of the support seats 14. Circular holes are formed on the opposite inner walls of the two transmission grooves. A rotating shaft 19 is rotatably installed in the four circular holes together. A rotating motor 20 is fixedly installed on the side of one of the support seats 14. The output shaft of the rotating motor 20 is connected to one end of the rotating shaft 19. Two rotating gears 21 are fixedly sleeved on the outer wall of the circumference of the rotating shaft 19. The two rotating gears 21 are respectively meshed and installed with the two first annular racks 22 through the annular holes. By driving the rotating gears 21 to be meshed with the first annular racks 22 through the rotating shaft 19, the rotating rings 16, multiple electric telescopic rods 17, and multiple V-shaped clamping plates 18 can be rotated synchronously, driving the oil pipe to achieve the rotating function, which is convenient for grinding and welding operations.

[0037] As Figure 2 and Figure 3 shown, a pipe support mechanism is arranged on the top of the welding table 1. The pipe support mechanism includes two square rods 3. Two square holes are formed on the top of the welding table 1. The two square rods 3 are respectively slidably installed in the two square holes. Limiting circular plates are fixedly installed at the bottoms of the two square rods 3. Mounting seats 12 are fixedly installed at the tops of the two square rods 3. Two circular shafts are rotatably installed on the opposite inner walls of the two mounting seats 12. The two circular shafts are symmetrically arranged. Support rollers 13 are fixedly sleeved on the outer walls of the circumferences of the two circular shafts. Specifically, the diameters of the support rollers 13 located above the two mounting seats 12 are different. The two square rods 3 are connected by a lifting assembly. The lifting assembly includes a first bidirectional lead screw 7. A sliding hole is formed on the top of the welding table 1. The two ends of the first bidirectional lead screw 7 are respectively rotatably installed on the opposite inner walls of the sliding hole. A motor slot is formed on the side inner wall of the sliding hole. A driving motor 8 is fixedly installed in the motor slot. The output shaft of the driving motor 8 extends into the sliding hole and is fixedly sleeved with a driving bevel gear 9. A driven bevel gear 10 is fixedly sleeved on the outer wall of the circumference of the first bidirectional lead screw 7. Two square sliders 6 are threadedly installed on the first bidirectional lead screw 7. The tops of the two square sliders 6 are respectively rotatably installed with first connecting rods 11. The other ends of the two first connecting rods 11 are respectively rotatably installed on the opposite sides of the two square rods 3. By driving the two square rods 3 to drive the two mounting seats 12 and multiple support rollers 13 to move upward synchronously, the oil pipe can be supported to prevent bending.

[0038] As Figure 6As shown in the figure, the adjusting mechanism includes a rectangular frame 23, which is fixedly installed on the bottom inner wall of the U-shaped top plate 2. A second bidirectional lead screw 25 is rotatably installed on the opposite inner walls of the rectangular frame 23. An adjusting motor 26 is fixedly installed on the side of the rectangular frame 23. The output shaft of the adjusting motor 26 is connected to one end of the second bidirectional lead screw 25. Two sliding plates 24 are threadedly installed on the second bidirectional lead screw 25. The bottoms of the two sliding plates 24 are respectively fixedly connected to the tops of the rectangular mounting plate 27 and the U-shaped mounting plate 28. Through the setting of the second bidirectional lead screw 25, when the adjusting motor 26 drives the second bidirectional lead screw 25 to rotate, the two sliding plates 24 can be driven to move synchronously and in opposite directions through the thread action, thereby driving the welding mechanism and the grinding mechanism to move to appropriate positions synchronously.

[0039] As Figure 1 shown in the figure, the welding mechanism includes a welding torch 4. An installation hole is opened on the side of the rectangular mounting plate 27. The welding torch 4 is fixedly installed in the installation hole. A welding cable is connected to the side of the welding torch 4. The other end of the welding cable is connected to a power source. By fixedly installing the welding torch 4 on the rectangular mounting plate 27, the positions of the rectangular mounting plate 27 and the welding torch 4 can be adjusted by the rotation of the second bidirectional lead screw 25.

[0040] As Figure 8 and Figure 11 shown in the figure, the linkage assembly includes a plurality of arc-shaped blocks 34. An annular cavity is opened in the grinding wheel 31. A plurality of sliding holes are opened on the side inner wall of the annular cavity. The plurality of arc-shaped blocks 34 are respectively slidably installed in the plurality of sliding holes. The sides of the plurality of arc-shaped blocks 34 are respectively fixedly connected to the sides of the plurality of arc-shaped grinding sheets 51. A plurality of circular grooves are opened on both the circumferential inner wall and the circumferential outer wall of the annular cavity. A plurality of screw rods 33 are rotatably installed in the plurality of circular grooves together. The plurality of arc-shaped blocks 34 are respectively threadedly installed on the plurality of screw rods 33. Linkage bevel gears 37 are fixedly sleeved on the circumferential outer walls of the plurality of screw rods 33. A circular ring 35 is rotatably installed on the circumferential inner wall of the annular cavity. An annular bevel gear rack 36 is fixedly installed on the side of the circular ring 35. The annular bevel gear rack 36 is meshed with the plurality of linkage bevel gears 37. Through the setting of the annular bevel gear rack 36 and the plurality of linkage bevel gears 37, when the circular ring 35 drives the annular bevel gear rack 36 to rotate, the plurality of screw rods 33 can be driven to rotate through the meshing action, so as to synchronously adjust the positions of the plurality of arc-shaped blocks 34, thereby realizing the adjustment of the positions of the plurality of arc-shaped grinding sheets 51, facilitating the grinding of oil pipes with different diameters. A control unit is arranged on the circumferential outer wall of the circular ring 35. Arc-shaped grooves are opened on both sides of the plurality of arc-shaped grinding sheets 51. Arc-shaped limiting rods 52 are fixedly installed on the side inner walls of the plurality of arc-shaped grooves. Arc-shaped connecting plates 53 are slidably installed on the circumferential outer walls of each pair of adapted arc-shaped limiting rods 52 together. The plurality of arc-shaped connecting plates 53 are respectively slidably installed in the plurality of arc-shaped grooves. Grinding sandpapers 54 are arranged on the circumferential outer walls of the plurality of arc-shaped grinding sheets 51 and the circumferential outer wall of the grinding wheel 31.

[0041] As shown Figure 9 in the figure, the control unit includes an adjusting gear 40. An installation shaft is rotatably installed on the inner wall of the side of the annular cavity. The other end of the installation shaft penetrates outside the grinding wheel 31 and is fixedly installed with a plum blossom knob 41. The adjusting gear 40 is fixedly sleeved on the outer wall of the circumference of the installation shaft. A second annular rack 39 is fixedly installed on the outer wall of the circumference of the ring 35. The second annular rack 39 is meshed and installed with the adjusting gear 40. A fixing block 42 is fixedly installed on the outer wall of the circumference of the annular cavity. A threaded hole is jointly arranged on the side of the fixing block 42 and the outer wall of the circumference of the grinding wheel 31. A limit bolt 43 is threadedly installed in the threaded hole. The end of the limit bolt 43 is attached to the installation shaft. An avoidance groove adapted to the limit bolt 43 is arranged on the outer wall of the circumference of the grinding wheel 31. Through the meshing action of the adjusting gear 40 and the second annular rack 39, when the plum blossom knob 41 is rotated, the ring 35 can be driven to rotate synchronously, so as to realize the adjustment of the positions of a plurality of arc-shaped blocks 34. And through the arrangement of the limit bolt 43, the installation shaft can be limited to prevent it from rotating randomly.

[0042] As shown Figure 10 in the figure, the cleaning mechanism includes a cylinder 44. A U-shaped side plate 29 is fixedly installed on the side of the U-shaped mounting plate 28. A second rectangular groove is opened on the side of the U-shaped side plate 29. One end of the cylinder 44 is rotatably installed on the inner wall of the side of the second rectangular groove. The other end of the cylinder 44 penetrates the inner wall of the side of the second rectangular groove and is rotatably installed on the inner wall of the side of the U-shaped side plate 29. A linkage shaft 47 is jointly rotatably installed on the opposite inner walls of the second rectangular groove. Sprockets 45 are fixedly sleeved on the outer walls of the circumferences of the rotating rod 38 and the linkage shaft 47. A chain 46 is meshed and installed on the two sprockets 45. A driving gear 48 is fixedly sleeved on the outer wall of the circumference of the linkage shaft 47. A driven gear 49 is fixedly sleeved on the outer wall of the circumference of the cylinder 44. The driven gear 49 is meshed and installed with the driving gear 48. Through the transmission action of the two sprockets 45, the chain 46, the driving gear 48 and the driven gear 49, when the rotating rod 38 rotates, the cylinder 44 can be driven to rotate synchronously, so as to realize the automatic cleaning function.

[0043] As shown Figure 12 and Figure 13As shown, the cleaning mechanism further includes a plurality of first cleaning brushes 56 and a plurality of second cleaning brushes 58. A fixed sleeve 55 is fixedly sleeved on the outer wall of the circumferential side of the cylinder 44. A plurality of first cleaning brushes 56 are fixedly installed on the outer wall of the circumferential side of the fixed sleeve 55. A plurality of first cleaning brushes 56 are all in contact with the outer wall of the circumferential side of the grinding wheel 31. A third bidirectional lead screw 59 is rotatably installed on the inner wall of the end of the cylinder 44. The other end of the third bidirectional lead screw 59 penetrates outside the U-shaped side plate 29 and is fixedly installed with a knob 60. Two circular sliding plates 61 are threadedly installed on the third bidirectional lead screw 59. A plurality of support holes are provided on the inner wall of the circumferential side of the cylinder 44. A plurality of second connecting rods 62 are rotatably installed at the mutually approaching ends of the two circular sliding plates 61. A plurality of second connecting rods 62 are respectively movably arranged in a plurality of support holes. The ends of each pair of adapted second connecting rods 62 are jointly rotatably installed with a mounting plate 57. A plurality of second cleaning brushes 58 are respectively fixedly installed on the sides of a plurality of mounting plates 57. Through the arrangement of the plurality of first cleaning brushes 56 and the plurality of second cleaning brushes 58, the outer walls of the circumferential sides of the grinding wheel 31 and the arc-shaped grinding pieces 51 can be cleaned. And by adjusting the distance between the second cleaning brush 58 and the axis, the arc-shaped grinding pieces 51 at different positions can be cleaned, improving the continuous cleaning ability.

[0044] The working principle and usage process of the present invention are as follows: When in use, two oil pipes are respectively passed through the two fixed rings 5 and connected. Start a plurality of electric telescopic rods 17 to drive a plurality of V-shaped clamping plates 18 to move synchronously towards the axis, respectively clamp the two oil pipes. Then start the driving motor 8 to drive the driving bevel gear 9 to rotate, and then drive the first bidirectional lead screw 7 to rotate through the meshing action with the driven bevel gear 10. Under the action of the thread, drive the two square sliding blocks 6 to move away from each other synchronously, and through the connection action of the two first connecting rods 11, make the two square rods 3 drive the two mounting seats 12 and the four support rollers 13 to move upward synchronously, realizing the support function for the two pipelines.

[0045] Start the adjusting motor 26 to drive the second bidirectional lead screw 25 to rotate. Drive the two sliding plates 24 to move towards each other synchronously through the action of the thread, thereby driving the rectangular mounting plate 27 and the U-shaped mounting plate 28 to move towards each other synchronously, so that the grinding wheel 31 is in contact with the outer wall of the circumferential side of the pipeline with a larger diameter. Then remove the limit of the limit bolt 43 on the mounting shaft, and rotate the plum blossom knob 41 to drive the mounting shaft and the adjusting gear 40 to rotate, thereby driving the ring 35 and the annular bevel gear rack 36 to rotate synchronously through its meshing action with the second annular rack 39. Then drive a plurality of screw rods 33 to rotate synchronously through the meshing action of the annular bevel gear rack 36 and a plurality of linkage bevel gears 37. Drive a plurality of arc-shaped blocks 34 to move away from the axis direction synchronously under the action of the thread, thereby driving a plurality of arc-shaped grinding pieces 51 to move synchronously, so that the outer wall of the circumferential side of the arc-shaped grinding piece 51 is in contact with the outer wall of the circumferential side of the oil pipe with a smaller diameter.

[0046] Rotating the knob 60 drives the third bidirectional lead screw 59 to rotate. Through the threaded action, it drives two circular sliding plates 61 to move synchronously towards each other. Through the connection of multiple second connecting rods 62, it drives multiple mounting plates 57 and multiple second cleaning brushes 58 to move synchronously, so that the second cleaning brush 58 is in contact with the peripheral outer wall of the arc-shaped grinding piece 51. Starting the grinding motor 30 drives the rotating rod 38 to rotate, thereby driving the grinding wheel 31, the circular plate 32, and multiple arc-shaped grinding pieces 51 to rotate synchronously to grind the peripheral outer walls of the two oil pipes. During the grinding process, starting the rotating motor 20 drives the rotating shaft 19 to rotate, thereby driving two rotating gears 21 to rotate synchronously. Through the meshing action of the two rotating gears 21 and the two first annular racks 22, it drives two rotating rings 16, multiple electric telescopic rods 17, and the two oil pipes to rotate synchronously, so that the grinding wheel 31 and multiple arc-shaped grinding pieces 51 can comprehensively grind the peripheral outer walls of the two oil pipes, and the grinding effect is better.

[0047] When the oil pipe rotates 180 degrees, the welding torch 4 starts to weld the connection. And with the uniform rotation of the oil pipe, it can weld the oil pipe evenly, effectively improving the welding effect. After the oil pipe is welded, under the action of the grinding wheel 31 and multiple arc-shaped grinding pieces 51, it can clean the weld position in time, effectively improving the welding quality and preventing subsequent corrosion and other phenomena.

[0048] When the grinding wheel 31 and multiple arc-shaped grinding pieces 51 are rotating, the rotating rod 38 can drive the linkage shaft 47 to rotate synchronously under the meshing action of two sprockets 45 and a chain 46. Furthermore, under the meshing action of a driving gear 48 and a driven gear 49, it drives the cylinder 44 to rotate in the reverse direction. When the cylinder 44 rotates, it can drive multiple first cleaning brushes 56 and multiple second cleaning brushes 58 to rotate synchronously, thereby cleaning the peripheral outer walls of the grinding wheel 31 and multiple arc-shaped grinding pieces 51, so that the grinding wheel 31 and multiple arc-shaped grinding pieces 51 can always maintain a good cleaning effect.

[0049] The above is only a preferred embodiment of the present invention, and it does not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A special welding device for heat-insulating oil casing with internal pipe connection, comprising a welding table (1), characterized in that: A pipe clamping mechanism is provided at the top of the welding table (1). The pipe clamping mechanism includes two rotating rings (16). The two rotating rings (16) are symmetrically arranged above the welding table (1) and are connected to a rotating assembly. Three mounting grooves are provided in the inner walls of the circumferences of the two rotating rings (16). Electric telescopic rods (17) are fixedly installed in the six mounting grooves. V-shaped clamping plates (18) are fixedly installed at the output ends of the six electric telescopic rods (17). A U-shaped top plate (2) is fixedly installed on the top of the welding table (1). A rectangular mounting plate (27) and a U-shaped mounting plate (28) are movably installed on the bottom inner wall of the U-shaped top plate (2) through an adjusting mechanism. A welding mechanism is arranged on the rectangular mounting plate (27), and a grinding mechanism is arranged on the U-shaped mounting plate (28). The welding mechanism and the grinding mechanism are symmetrically arranged. The grinding mechanism includes a grinding wheel (31). A first rectangular groove is provided in the U-shaped mounting plate (28). A rotating rod (38) is rotatably installed on the side inner wall of the first rectangular groove. The other end of the rotating rod (38) penetrates through the side inner wall of the first rectangular groove and is rotatably installed on the side inner wall of the U-shaped mounting plate (28). The grinding wheel (31) is fixedly sleeved on the rotating rod (38). A grinding motor (30) is fixedly installed on the side of the U-shaped mounting plate (28). The output shaft of the grinding motor (30) is connected to one end of the rotating rod (38). A circular plate (32) is fixedly sleeved on the outer wall of the circumference of the rotating rod (38). The end of the circular plate (32) is fixedly connected to the end of the grinding wheel (31). A plurality of sliding grooves are provided in the outer wall of the circumference of the circular plate (32). Limiting shafts (50) are slidably installed in the plurality of sliding grooves. Arc-shaped grinding pieces (51) are fixedly installed at the ends of the plurality of limiting shafts (50). The plurality of arc-shaped grinding pieces (51) are all connected to a linkage assembly. A cleaning mechanism is arranged on the side of the U-shaped mounting plate (28). The cleaning mechanism is used for synchronously cleaning the grinding wheel (31) and the plurality of arc-shaped grinding pieces (51); The linkage assembly includes a plurality of arc-shaped blocks (34). An annular cavity is formed in the grinding wheel (31). A plurality of sliding holes are formed in the side inner wall of the annular cavity. The plurality of arc-shaped blocks (34) are respectively slidably installed in the plurality of sliding holes. The side parts of the plurality of arc-shaped blocks (34) are respectively fixedly connected to the side parts of the plurality of arc-shaped grinding sheets (51). A plurality of circular grooves are formed in both the circumferential inner wall and the circumferential outer wall of the annular cavity. A plurality of screw rods (33) are rotatably installed in the plurality of circular grooves together. The plurality of arc-shaped blocks (34) are respectively threadedly installed on the plurality of screw rods (33). Linkage bevel gears (37) are fixedly sleeved on the circumferential outer walls of the plurality of screw rods (33). A circular ring (35) is rotatably installed on the circumferential inner wall of the annular cavity. An annular bevel gear rack (36) is fixedly installed on the side part of the circular ring (35). The annular bevel gear rack (36) is meshed and installed with the plurality of linkage bevel gears (37). A control unit is arranged on the circumferential outer wall of the circular ring (35). Arc-shaped grooves are formed on both sides of the plurality of arc-shaped grinding sheets (51). Arc-shaped limiting rods (52) are fixedly installed on the side inner walls of the plurality of arc-shaped grooves. Arc-shaped connecting plates (53) are slidably installed together on the circumferential outer walls of every two adapted arc-shaped limiting rods (52). The plurality of arc-shaped connecting plates (53) are respectively slidably installed in the plurality of arc-shaped grooves. Grinding sandpapers (54) are arranged on the circumferential outer walls of the plurality of arc-shaped grinding sheets (51) and the circumferential outer wall of the grinding wheel (31).

2. The special welding equipment for the inner tube-connected heat-insulating oil casing according to claim 1, characterized in that: The rotating assembly includes four support seats (14). The four support seats (14) are all fixedly installed on the top of the welding table (1). Two fixing rings (5) are respectively fixedly installed on the four support seats (14). Annular grooves are formed in the circumferential inner walls of the two fixing rings (5). Two rotating rings (16) are respectively rotatably installed in the two annular grooves. Annular holes are formed in the circumferential inner walls of the two annular grooves. First annular gear racks (22) are fixedly installed on the circumferential outer walls of the two rotating rings (16). Transmission grooves are formed in the side parts of two of the support seats (14). Circular holes are formed in the opposite inner walls of the two transmission grooves. A rotating shaft (19) is rotatably installed in the four circular holes together. A rotating motor (20) is fixedly installed on the side part of one of the support seats (14). The output shaft of the rotating motor (20) is connected to one end of the rotating shaft (19). Two rotating gears (21) are fixedly sleeved on the circumferential outer wall of the rotating shaft (19). The two rotating gears (21) are respectively meshed and installed with the two first annular gear racks (22).

3. The special welding equipment for the inner tube connected heat-insulating oil casing according to claim 1, characterized in that: The top of the welding table (1) is provided with a pipe support mechanism, and the pipe support mechanism includes two square rods (3). Two square holes are formed in the top of the welding table (1), and the two square rods (3) are respectively slidably installed in the two square holes. Limiting circular plates are fixedly installed at the bottoms of the two square rods (3), and mounting seats (12) are fixedly installed at the tops of the two square rods (3). Two circular shafts are rotatably installed on the opposite inner walls of the two mounting seats (12), the two circular shafts are symmetrically arranged, and support rollers (13) are fixedly sleeved on the outer walls of the circumferences of the two circular shafts. The two square rods (3) are connected by a lifting assembly.

4. The special welding equipment for the internally pipe-connected heat-insulating oil casing according to claim 3, characterized in that: The lifting assembly includes a first bidirectional lead screw (7). A sliding hole is formed in the top of the welding table (1), and the two ends of the first bidirectional lead screw (7) are respectively rotatably installed on the opposite inner walls of the sliding hole. A motor slot is formed in the side inner wall of the sliding hole, and a driving motor (8) is fixedly installed in the motor slot. The output shaft of the driving motor (8) extends into the sliding hole and is fixedly sleeved with a driving bevel gear (9). A driven bevel gear (10) is fixedly sleeved on the outer wall of the circumference of the first bidirectional lead screw (7). Two square sliders (6) are threadedly installed on the two first bidirectional lead screws (7). First connecting rods (11) are rotatably installed at the tops of the two square sliders (6), and the other ends of the two first connecting rods (11) are respectively rotatably installed on the opposite sides of the two square rods (3).

5. The special welding equipment for the inner pipe connection type heat-insulating oil casing according to claim 1, characterized in that: The adjusting mechanism includes a rectangular frame (23). The rectangular frame (23) is fixedly installed on the bottom inner wall of the U-shaped top plate (2). A second bidirectional lead screw (25) is rotatably installed on the opposite inner walls of the rectangular frame (23). An adjusting motor (26) is fixedly installed on the side of the rectangular frame (23), and the output shaft of the adjusting motor (26) is connected to one end of the second bidirectional lead screw (25). Two sliding plates (24) are threadedly installed on the second bidirectional lead screw (25), and the bottoms of the two sliding plates (24) are respectively fixedly connected to the tops of the rectangular mounting plate (27) and the U-shaped mounting plate (28).

6. The special welding equipment for the inner tube connection type heat-insulating oil casing according to claim 1, characterized in that: The welding mechanism includes a welding torch (4). An installation hole is formed in the side of the rectangular mounting plate (27), and the welding torch (4) is fixedly installed in the installation hole. A welding cable is connected to the side of the welding torch (4), and the other end of the welding cable is connected to a power source.

7. The special welding equipment for the inner pipe connection type heat-insulating oil casing according to claim 1, characterized in that: The control unit includes an adjusting gear (40). An installation shaft is rotatably installed on the inner wall of the side of the annular cavity. The other end of the installation shaft penetrates outside the grinding wheel (31) and is fixedly installed with a plum blossom knob (41). The adjusting gear (40) is fixedly sleeved on the outer wall of the circumference of the installation shaft. A second annular rack (39) is fixedly installed on the outer wall of the circumference of the ring (35). The second annular rack (39) is meshed and installed with the adjusting gear (40). A fixed block (42) is fixedly installed on the outer wall of the circumference of the annular cavity. A threaded hole is jointly arranged on the side of the fixed block (42) and the outer wall of the circumference of the grinding wheel (31). A limit bolt (43) is threadedly installed in the threaded hole. The end of the limit bolt (43) is attached to the installation shaft. An avoidance groove adapted to the limit bolt (43) is arranged on the outer wall of the circumference of the grinding wheel (31).

8. A special welding device for an inner tube-connected heat-insulating oil casing according to claim 1, characterized in that: The cleaning mechanism includes a cylinder (44). A U-shaped side plate (29) is fixedly installed on the side of the U-shaped mounting plate (28). A second rectangular groove is opened on the side of the U-shaped side plate (29). One end of the cylinder (44) is rotatably installed on the inner wall of the side of the second rectangular groove. The other end of the cylinder (44) penetrates the inner wall of the side of the second rectangular groove and is rotatably installed on the inner wall of the side of the U-shaped side plate (29). A linkage shaft (47) is jointly rotatably installed on the opposite inner walls of the second rectangular groove. Chain wheels (45) are fixedly sleeved on the outer walls of the circumferences of the rotating rod (38) and the linkage shaft (47). A chain (46) is meshed and installed on the two chain wheels (45). A driving gear (48) is fixedly sleeved on the outer wall of the circumference of the linkage shaft (47). A driven gear (49) is fixedly sleeved on the outer wall of the circumference of the cylinder (44). The driven gear (49) is meshed and installed with the driving gear (48).

9. The special welding equipment for an inner tube-connected heat-insulating oil casing according to claim 8, characterized in that: The cleaning mechanism further includes a plurality of first cleaning brushes (56) and a plurality of second cleaning brushes (58). A fixed sleeve (55) is fixedly sleeved on the outer wall of the circumference of the cylinder (44). The plurality of first cleaning brushes (56) are all fixedly installed on the outer wall of the circumference of the fixed sleeve (55). The plurality of first cleaning brushes (56) are all attached to the outer wall of the circumference of the grinding wheel (31). A third bidirectional lead screw (59) is rotatably installed on the inner wall of the end of the cylinder (44). The other end of the third bidirectional lead screw (59) penetrates outside the U-shaped side plate (29) and is fixedly installed with a knob (60). Two circular sliding plates (61) are threadedly installed on the third bidirectional lead screw (59). A plurality of support holes are opened on the inner wall of the circumference of the cylinder (44). A plurality of second connecting rods (62) are rotatably installed at the mutually approaching ends of the two circular sliding plates (61). The plurality of second connecting rods (62) are respectively movably arranged in the plurality of support holes. The ends of each pair of adapted second connecting rods (62) are jointly rotatably installed with a mounting plate (57). The plurality of second cleaning brushes (58) are respectively fixedly installed on the sides of the plurality of mounting plates (57).

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