A bevel groove milling device suitable for auxiliary welding of LNG pressure vessels

Abstract

The present invention provides a bevel groove milling device suitable for auxiliary welding of LNG pressure vessels, which solves the problems of large double-sided milling workload, inability to move and guide milling, easy offset of milling, and poor milling accuracy. The device comprises a milling frame and a mounting frame, wherein a second mounting frame and a first mounting frame are fixedly mounted on the inner side of the mounting frame, an upper clamping plate is welded on one side of the mounting frame, a positioning frame is welded on the inner side of the upper clamping plate, a driving group and a driven shaft are movably mounted on the inner side of the positioning frame, a transmission frame is slidably connected to the inner side of the positioning frame, a first driving bevel gear is rotated inside the transmission frame, a first driven bevel gear is provided on the surface of the driven shaft and the driving group, a universal joint is provided between the two first driving bevel gears, and a milling cutter is mounted on one end of the driving group and the driven shaft. The present invention drives the milling cutter connected to one end of the driving group to rotate through the conventional driving operation of the driving group. At the same time, when the driving group is driving, it can drive the first driving bevel gear installed in conjunction with the driving group to mesh and rotate with the first driven bevel gear.

Description

Technical Field

[0001] The invention relates to the technical field of LNG pressure vessel welding edge milling, in particular to a bevel groove edge milling device suitable for auxiliary welding of LNG pressure vessels. Background Art

[0002] LNG pressure vessels are specialized vessels used for the storage and transportation of liquefied natural gas (LNG). They typically feature a double-walled structure with excellent thermal insulation properties, keeping LNG at a low temperature (approximately -162°C) and a constant pressure to minimize evaporation and ensure safety. They are also equipped with various safety devices and monitoring instruments to monitor and ensure safe operation.

[0003] When welding, the surface quality of the material needs to be checked. There must be no defects such as cracks, pores, slag inclusions, etc. The welding equipment, such as electric welding machines and gas shielded equipment, needs to be debugged according to the welding process requirements to ensure that the equipment can operate normally and the welding parameters are stable. Before welding, the groove of the weld needs to be processed. Traditional methods such as mechanical processing or flame cutting are used to ensure that the size and shape of the groove meet the welding process requirements. Then, tools such as grinding wheels and wire brushes are used to clean impurities such as oil, rust, and moisture on the groove and the surfaces on both sides until the metallic luster is exposed.

[0004] Among them, a milling machine is needed for mechanical processing. The milling surface needs to be considered according to the welding requirements. At present, the process of milling one side of a cutter head is relatively mature, but when double-sided milling is required, the following steps are mostly required: such as mechanically or manually turning over the heavy plate, and rotating the milling machine to a certain extent. This will increase the burden on the staff, and further positioning operations are required on the milling machine.

[0005] During the milling process, conventional milling machines may also cause the milling to deviate due to vibration or uneven ground. The deviation will lead to large milling errors, thereby affecting the accuracy of milling, as well as the quality of subsequent workpiece welding and even causing many other problems such as waste of raw materials.

[0006] On this basis, the present invention provides a bevel groove milling device suitable for auxiliary welding of LNG pressure vessels to solve the above problems. Summary of the Invention

[0007] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides a bevel groove milling device suitable for auxiliary welding of LNG pressure vessels. The present invention has an ingenious structure and practical value, and effectively solves the technical problems of large workload of double-sided milling, inability to guide milling movement, easy offset of milling and poor milling accuracy.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A bevel groove milling device suitable for auxiliary welding of LNG pressure vessels includes a milling frame and a mounting frame arranged on one side of the milling frame, a second mounting frame and a first mounting frame are fixedly installed on the inner side of the mounting frame, an upper clamping plate is welded on one side of the mounting frame, a positioning frame is welded on the inner side of the upper clamping plate, a driving group and a driven shaft are movably installed on the inner side of the positioning frame, a transmission frame is slidably connected to the inner side of the positioning frame, a first driving bevel gear is rotatably connected to the inside of the transmission frame, a first driven bevel gear that meshes with the first driving bevel gear is fixedly installed on the surface of the driven shaft and the driving group, a universal joint is arranged between the two first driving bevel gears, a milling cutter is fixedly installed on one end of the driving group and the driven shaft, the two milling cutters used for milling are consistent in size and material, and the two milling cutters maintain a symmetrical position during operation.

[0010] Preferably, a connecting sleeve is fixedly mounted on the surface of the driving group and the surface of the driven shaft, and the connecting sleeve is rotatably connected to the inner side of the positioning frame.

[0011] Preferably, an adjustment electric push rod is connected to one side of the first mounting bracket, and a connecting plate is fixedly installed at one end of the adjustment electric push rod, and symmetrical fixed cylinders are fixedly installed at both ends of the connecting plate, and a sliding plate is slidably connected to the inside of the fixed cylinder, and a limiting slide rod is fixedly installed on the inside of the sliding plate, and the surface of the limiting slide rod is sleeved with a limiting slide rail, and the limiting slide rod is respectively fixedly installed on the surface of the driving group and the driven shaft, and the limiting slide rail is fixed at one end of the second mounting bracket, and the limiting slide rail is an arc-shaped inclined groove structure, so that the limiting slide rod can produce height changes when sliding inside the limiting slide rail, and the two fixed cylinders are a centrally symmetrical structure, so that the two limiting slide rods can be adjusted at the same time.

[0012] Preferably, a screw rod is sleeved on the milling machine frame, and there are two groups of screw rods. A transmission gear is fixedly installed on the top of each milling machine frame and the surface of the screw rod, and a changing gear is engaged between the two transmission gears so that the transmission gear and the changing gear are engaged with each other. A driving torque is fixedly installed on the top of one of the screw rods, and threaded sleeves are threadedly connected to the surfaces of the two screw rods. The threaded sleeves are fixedly installed on one side of the mounting frame, and a positioning guide device is provided on the outer side of the upper clamping plate connected to one side of the mounting frame.

[0013] Preferably, one side of the edge milling machine frame is fixedly connected to a limiting slide groove, the surface of the limiting slide groove is slidably connected to a limiting slider, and the limiting slider is fixedly installed on one side of the mounting frame.

[0014] Preferably, the positioning guide device includes a channel steel fixedly connected to the mounting bracket, a mounting plate is provided at one side of the channel steel, a limit spring is fixedly installed between the mounting plate and the channel steel, a through hole is provided on the surface of the channel steel, a threaded rod is fixedly provided on the inner side of the mounting plate and penetrates into the through hole, the surface of the threaded rod is threadedly connected to a limit nut, the number of the limit nuts is two and the two limit nuts are respectively located at the positions inside and outside the channel steel. One end of the threaded rod is fixedly installed with a sliding bracket through a support rod, a rolling drum is hingedly installed inside the sliding bracket, a second active bevel gear is fixedly installed on the top of the rolling drum, and a second driven bevel gear meshing with the second active bevel gear is rotatably connected to the top of the sliding bracket, and a guide cylinder is welded on one end of the second driven bevel gear

[0015] Preferably, the connecting sleeve is fixedly installed inside the channel steel, a connecting rod is slidably connected inside the connecting sleeve, and one end of the connecting rod is welded to the inner side of the mounting plate.

[0016] Preferably, a clamping electric push rod is fixedly installed at the bottom of the mounting frame, the top of the clamping electric push rod is connected to a lower clamping plate, a barrel is fixedly provided at the bottom of the lower clamping plate, an auger is rotatably connected inside the barrel, and a unloading drive is connected to the bottom end of the auger and the bottom of the barrel.

[0017] Preferably, a slope is provided at the bottom inner portion of the lower clamping plate, a discharge port is provided on the barrel near the bottom end, and a waste collecting trough is mounted on the bottom portion of the milling machine frame.

[0018] Preferably, the surface of the mounting frame is slidably connected to a clamping plate slide rail, and the clamping plate slide rail is fixedly mounted on the surface of the lower clamping plate.

[0019] The present invention has the following technical effects.

[0020] 1. The present invention drives the milling cutter connected to one end of the driving group to rotate through the conventional driving operation of the driving group. At the same time, when the driving group is driving, it can drive the first driving bevel gear and the first driven bevel gear installed in conjunction with the driving group to engage and rotate. Through the universal joint provided in connection, the other pair of the first driving bevel gear and the first driven bevel gear are driven to rotate, thereby driving the driven shaft and the milling cutter connected to one end of the driven shaft to rotate. The rotation of the two milling cutters can simultaneously perform double-sided milling on the steel plate, thereby making up for the practical problem of repeated adjustments required during double-sided milling.

[0021] 2. The present invention works by adjusting the electric push rod to drive the connecting plate, the fixed cylinder and the limit slide to move. The limit slide is limited by the fixedly installed limit slide rail, driving the fixed cylinder to slide inside the sliding plate, and adjusting the height of the fixed cylinder and the limit slide. At the same time, the angle of the two milling cutters connected to the driving group and one end of the driven shaft is adjusted. At this time, corresponding and flexible adjustments can be made according to the actual milling angle.

[0022] 3. The present invention determines the overall position of the channel steel when adjusting the feed depth. After determination, the support rod and the sliding frame can be locked with the help of a limit nut. In the actual process of milling and structure movement, the rolling cylinder rolls on the surface of the steel plate, driving the second active bevel gear and the second driven bevel gear to rotate, thereby driving the guide cylinder to roll on the steel plate. The guide cylinder rolls and pulls the structure inward, cooperating with the limiting of the rolling cylinder, reducing the occurrence of structure offset and separation during the milling process, and providing milling accuracy.

[0023] 4. The present invention drives the threaded sleeve, the mounting frame and the upper clamping plate to move up and down by rotating the driving torque and meshing the transmission gears, and can flexibly adjust the milling edge height according to the height of the steel plate.

[0024] 5. The present invention works through the unloading driver to drive the auger to rotate, so that the waste that is drawn into the barrel from the slope inside the lower clamping plate can be pulled to the discharge port position and then discharged, and the waste can be collected and stored in conjunction with the waste collecting trough, effectively protecting the working environment, and at the same time reducing the accumulation of waste on the ground, which causes the structure to move and the ground to be uneven. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a side structural schematic diagram of the present invention.

[0027] Figure 2 It is a schematic diagram of the side cross-sectional structure of the present invention.

[0028] Figure 3 It is an enlarged structural diagram of the driving group, the driven shaft and the milling cutter in the present invention.

[0029] Figure 4 It is a schematic diagram of the top structure of the present invention.

[0030] Figure 5 It is a structural schematic diagram of the guiding device in the present invention.

[0031] Figure 6 It is a front view structural schematic diagram of the present invention.

[0032] Figure 7 It is a schematic diagram of the front cross-sectional structure of the present invention.

[0033] Reference numerals:

[0034] 1. Milling frame; 2. Drive unit; 3. Mounting frame; 4. Lower clamping plate; 5. Upper clamping plate; 6. Clamping plate slide rail; 7. Waste collection chute; 8. Positioning frame; 9. Ramp; 10. Barrel; 11. Unloading drive; 12. Discharge port; 13. Unloading shaft; 14. Auger; 15. Clamping push rod; 16. Second mounting frame; 17. First mounting frame; 18. Adjusting push rod; 19. Fixed barrel; 20. Sliding plate; 21. Limiting slide bar; 22. Limiting slide rail; 23. Connecting plate; 24. Connecting sleeve; 25. Driven shaft; 26. Threaded sleeve; 27. Transmission frame 28. Universal joint; 29. ​​Milling cutter; 30. First driving bevel gear; 31. First driven bevel gear; 32. Channel steel; 33. Mounting plate; 34. Threaded rod; 35. Through hole; 38. Limit nut; 37. Limit spring; 38. Connecting sleeve; 39. Connecting rod; 40. Support rod; 41. Sliding frame; 42. Rolling cylinder; 43. Second driven bevel gear; 44. Second driving bevel gear; 45. Second mating shaft; 46. First mating shaft; 47. Guide cylinder; 48. Screw; 49. Driving torque; 50. Transmission gear; 51. Limiting slide groove; 52. Limiting slider. DETAILED DESCRIPTION

[0035] The above and other technical contents, features and effects of the present invention are described below with reference to the attached Figures 1 to 7 The details of the embodiments will be clearly presented. The contents mentioned in the following embodiments are all based on the accompanying drawings.

[0036] Various exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0037] The present invention is a bevel groove milling device suitable for auxiliary welding of LNG pressure vessels, comprising a milling frame 1 and a mounting frame 3 arranged on one side of the milling frame 1, a second mounting frame 16 and a first mounting frame 17 are fixedly mounted on the inner side of the mounting frame 3, an upper clamping plate 5 is welded on one side of the mounting frame 3, a positioning frame 8 is welded on the inner side of the upper clamping plate 5, a driving group 2 and a driven shaft 25 are movably mounted on the inner side of the positioning frame 8, the driving group 2 is a driving motor connected to the driving shaft after being driven by a pulley, an outer sleeve is mounted on the outer side of the driving shaft, and when the subsequent driving group is rotated and adjusted, the driving motor, the belt group, and the driving shaft are connected. The shaft, outer sleeve, etc. are adjusted as a whole, the drive shaft is connected to the subsequent milling cutter 29, the drive motor is connected to the power supply and the controller, and the traditional milling machine assists the milling cutter 29 to rotate and the overall structure moves to mill the plate when in use. In the present invention, the inner side of the positioning frame 8 is slidably connected to a transmission frame 27 that is sleeved on the surface of the driving group 2 and the surface of the driven shaft 25. The transmission frame 27 can adjust the connection angle of the universal joint 28 and can provide sufficient installation space for the first driving bevel gear 30 and the first driven bevel gear 31. The transmission frame 27 is internally rotatably connected to two first driving bevel gears 30 ( Figure 3 In the enlarged view, only one of the first driving bevel gear 30 and the first driven bevel gear 31 is cut away, and the other one is in the transmission frame 27 above the universal joint 28. Figure 3 The first driven bevel gear 31 meshing with the first driving bevel gear 30 is fixedly mounted on the surface of the driven shaft 25 and the driving group 2, and a universal joint 28 is provided between the two first driving bevel gears 30. The first driving bevel gear 30 and the first driven bevel gear 31 mesh with each other to provide power for the transmission of the universal joint 28. The driving group 2 (specifically the above-mentioned driving shaft) and one end of the driven shaft 25 are fixedly mounted with a milling cutter 29. The two milling cutters 29 for milling edges are of the same size and material. Two identical milling cutters 29 are provided to ensure simultaneous milling. The positions of the two milling cutters 29 remain symmetrical during operation. A connecting sleeve 24 is fixedly mounted on the surface of the driving group 2 and the driven shaft 25. The connecting sleeve 24 is rotatably connected to the inner side of the positioning frame 8, so that the driving group 2 and the driven shaft 25 rotate on the positioning frame 8 with their respective connecting sleeves 24. The connecting sleeve 24 will limit the rotation of the driving group 2 and the driven shaft 25 so that they remain adjusted within the appropriate trajectory.

[0038] In this embodiment, when the drive group 2 (drive shaft) is driving normally, it drives the milling cutter 29 connected to the drive group 2 to rotate, and the milling cutter 29 can perform milling processing on the upper surface of the steel plate. When the drive group 2 rotates, it can drive the first driven bevel gear 31 and the first driving bevel gear 30 on the drive group 2 (drive shaft) to engage and rotate. The rotation of the first driving bevel gear 30 can drive the universal joint 28 to rotate accordingly. During the rotation of the universal joint 28, the first driving bevel gear 30 and the first driven bevel gear 31 on the surface of the driven shaft 25 can be driven to rotate accordingly, thereby driving the driven shaft 25 and the milling cutter 29 at one end of the driven shaft 25 to rotate accordingly. At this time, the upper and lower surfaces of the steel plate can be milled at the same time.

[0039] As an embodiment, one side of the first mounting bracket 17 is connected to an adjustment electric push rod 18, which is connected to a power supply and a controller. The adjustment electric push rod 18 can provide a driving force for the adjustment of the connecting plate 23. One end of the adjustment electric push rod 18 is fixedly installed with a connecting plate 23, and both ends of the connecting plate 23 are fixedly installed with symmetrical fixed cylinders 19. The fixed cylinder 19 provides a track limit for the sliding plate 20. The sliding plate 20 is slidably connected inside the fixed cylinder 19. A limiting slide rod 21 is fixedly installed on the inner side of the sliding plate 20. The surface of the limiting slide rod 21 is sleeved with a limiting slide rail 22. The limiting slide rail 22 is the limiting slide 21 for auxiliary limiting and at the same time for the driving group 2 and the driven shaft 25 connected to the limiting slide 21, so that the driving group 2 and the driven shaft 25 are adjusted within the set track, the limiting slide 21 is fixedly mounted on the surface of the driving group 2 and the driven shaft 25 respectively, the limiting slide 22 is fixed at one end of the second mounting bracket 16, the limiting slide 22 is an arc-shaped inclined groove structure, so that the limiting slide 21 can produce a height change when sliding inside the limiting slide 22, the two fixed cylinders 19 are a centrally symmetrical structure, so that the two limiting slides 21 can be adjusted simultaneously, such as Figure 3 As shown, the limiting slide rail 22 of the driven shaft 25 is at the lower right side, the limiting slide rod 21 fixes the driven shaft 25, and the limiting slide rail of the driving group 2 is at the upper left side, and the limiting slide rod 21 fixes the driving group 2.

[0040] In this embodiment, before the milling work is carried out, the electric push rod 18 can be controlled and adjusted to drive the connecting plate 23 and the fixed cylinder 19 to move. During the movement of the fixed cylinder 19, the limiting slide 21 will slide inside the fixedly installed limiting slide rail 22. The limiting slide rail 22 is an arc-shaped inclined groove structure, and the limiting slide rod 21 will slide inside the sliding plate 20, changing the height of the driving group 2 and the driven shaft 25 connected to the limiting slide rod 21, thereby adjusting the angle between the two milling cutters 29 connected to the port positions of the driving group 2 and the driven shaft 25. The milling angle can be adjusted and controlled accordingly according to actual needs.

[0041] As an embodiment, a screw rod 48 is sleeved on the milling frame 1, and there are two groups of screw rods 48. A transmission gear 50 is fixedly installed on the top of each milling frame 1 and the surface of the screw rod 48. A direction-changing gear is meshed between the two transmission gears 50, so that the transmission gear 50 and the direction-changing gear are meshed with each other. The screw rod 48 is a structure composed of a smooth shaft and a threaded rod end welded. The two screw rods 48 can assist in adjusting the height of the mounting frame 3 and are responsible for mutual locking assistance after adjustment to avoid uncontrollable height changes caused by shaking. One of the screw rods 4 8 A driving twist 49 is fixedly installed on the top, and the driving twist 49 is set to assist manual drive, which reduces the use of energy while assisting adjustment. The surfaces of the two screw rods 48 are threadedly connected with threaded sleeves 26, which can assist in adjusting the height of the screw rods 48. The threaded sleeves 26 are fixedly installed on one side of the mounting frame 3. A positioning guide device is provided on the outer side of the upper clamping plate 5 connected to one side of the mounting frame 3. One side of the milling machine frame 1 is fixedly connected to a limiting slide groove 51, and the surface of the limiting slide groove 51 is slidably connected to a limiting slider 52, and the limiting slider 52 is fixedly installed on one side of the mounting frame 3.

[0042] In this embodiment, during the adjustment process before milling, the driving knob 49 can be rotated to drive one of the transmission gears 50 to rotate, and the transmission gear 50 engages with the other transmission gear 50 through the changing gear to rotate, driving the two screw rods 48 to rotate at the same time. The screw rod 48 cooperates with the threaded sleeve 26 to drive the mounting frame 3 to rise and fall, and the milling height can be manually adjusted and controlled to assist the milling work.

[0043] As an embodiment, the positioning guide device includes a channel steel 32 fixedly connected to the mounting frame 3, the channel steel 32 provides a suitable installation space for the structure, a mounting plate 33 is provided on one side of the channel steel 32, a limit spring 37 is fixedly installed between the mounting plate 33 and the channel steel 32, the limit spring 37 assists in resetting and provides a certain degree of buffering force for positioning, a through hole 35 is opened on the surface of the channel steel 32, a threaded rod 34 passing through the inside of the through hole 35 is fixedly provided on the inner side of the mounting plate 33, the surface of the threaded rod 34 is threadedly connected to a limit nut 36, the limit nut 36 can lock the adjusted threaded rod 34 for protection, the number of the limit nuts 36 is two and the two limit nuts 36 are respectively located inside and outside the channel steel 32, and one end of the threaded rod 34 is fixedly installed with a sliding frame 41 through a support rod 40. The sliding frame 41 can provide installation space for subsequent positioning devices such as the rolling drum 42. The sliding frame 41 is hinged with a rolling drum 42, which can contact one side of the steel plate to assist in limiting the work. The second active bevel gear 44 is fixedly installed on the top of the rolling drum 42, and the top of the sliding frame 41 is rotatably connected to the second driven bevel gear 43 which meshes with the second active bevel gear 44. The second driven bevel gear 43 and the second active bevel gear 44 are arranged to cooperate with the driving guide drum 47 to roll and assist in guiding the positioning work. A guide drum 47 is welded to one end of the second driven bevel gear 43, and a number of metal barbs with the same inclination direction are provided on the surface of the guide drum 47. The connecting sleeve 38 is fixedly installed inside the channel steel 32, and a connecting rod 39 is slidably connected inside the connecting sleeve 38. One end of the connecting rod 39 is welded to the inner side of the mounting plate 33.

[0044] When the two limit nuts 36 are both attached to the inner wall of the channel steel 32, the support rod 40 and the sliding frame 41 are locked and protected. During the milling stage, the structure as a whole moves sideways, driving the rolling cylinder 42 rolling on one side of the steel plate to rotate counterclockwise, and the second active bevel gear 44 and the second driven bevel gear 43 are transmitted to drive the guide cylinder 47 to rotate clockwise. At this time, the guide cylinder 47 rolls on the surface of the steel plate. During the rolling process, the guide cylinder 47 uses the barbs to provide an inward constraint force to the steel plate, and the rolling cylinder 42 is locked to prevent it from actually moving inward, thereby guiding and positioning the movement of the structure.

[0045] As an embodiment, a clamping electric push rod 15 is fixedly installed at the bottom of the mounting frame 3, and the clamping electric push rod 15 is connected to the power supply and the controller. The setting of the clamping electric push rod 15 can assist in adjusting the height of the lower clamping plate 4. A plurality of transmission rollers are rotatably installed on the lower clamping plate 4 so that the structure can adapt to steel plates of different sizes and thicknesses. The top of the clamping electric push rod 15 is connected to the lower clamping plate 4, and a barrel 10 is fixedly set at the bottom of the lower clamping plate 4. The barrel 10 is used for storage and limit protection of waste materials, and an auger 14 is rotatably connected inside the barrel 10. The rotation of the auger 14 assists in the unloading of waste. A unloading driver 11 is connected to the bottom of the auger 14 and the bottom of the barrel 10. The unloading driver 11 is connected to the power supply and the controller. The unloading driver 11 provides driving force for the unloading operation. A slope 9 is provided at the bottom of the lower clamping plate 4. When the structure moves as a whole, the slope 9 can be used to guide and store the waste. A discharge port 12 is provided near the bottom end of the barrel 10. The surface of the mounting frame 3 is slidably connected to the clamping plate slide rail 6, and the clamping plate slide rail 6 is fixedly installed on the surface of the lower clamping plate 4.

[0046] In this embodiment, during the actual milling work, the waste generated by milling will fall into the internal space of 4, and the waste will fall into the internal space of 10 along 9 opened at the bottom of the interior of 4. While the milling is working, 11 can be controlled to work, driving 14 to rotate, and guiding the waste to the position near the bottom of 10. The waste will slide out from 12 and fall into the interior of 7 for storage.

[0047] Working principle:

[0048] S1. When double-sided milling of a steel plate is performed, first, the electric push rod 18 is controlled and adjusted according to the milling angle to drive the connecting plate 23 and the fixed cylinder 19 to move. At the same time, the fixed cylinder 19 pushes the limit slide 21 to move up and down inside the fixed limit slide rail 22. The lifting limit slide 21 drives the two driving groups 2 and the driven shaft 25 connected thereto to adjust, and cooperates with the rotation limit point of the connecting sleeve 24 and the connection of the universal joint 28 to drive the two milling cutters 29 to adjust the angle symmetrically.

[0049] S2. After the angle is adjusted, the driving knob 49 can be rotated according to the height of the steel plate to cooperate with the transmission between the transmission gears 50 to drive the two screw rods 48 to rotate simultaneously. The threaded sleeve 26 on the surface of the screw rod 48 rises and falls in the installation direction of the screw rod 48, thereby driving the mounting frame 3 and the upper clamping plate 5 to rise and fall, and adjust the upper clamping plate 5 to the appropriate position on the top of the steel plate;

[0050] S3. After adjusting the height, the device can be adjusted toward the steel plate according to the feed depth. When the position adjustment is completed, the two limit nuts 36 can be rotated to move in opposite directions so that the limit nuts 36 are attached to the surface of the channel steel 32, locking the support rod 40 and the sliding frame 41 for protection. Then, the clamping electric push rod 15 is started to push the lower clamping plate 4 upward so that the transmission roller on the lower clamping plate 4 contacts the plate.

[0051] S4. When it is necessary to perform milling on the steel plate, the drive group 2 can be controlled to work, driving the milling cutter 29 connected to one end of the drive group 2 to rotate. At the same time, the drive group 2 cooperates with the rotation of the first driving bevel gear 30 and the first driven bevel gear 31 to drive the universal joint 28 to rotate. The transmission characteristics of the universal joint 28 itself can drive the other pair of first driving bevel gears 30 and the first driven bevel gear 31 to rotate, thereby driving the driven shaft 25 and the milling cutter 29 connected to one end of the driven shaft 25 to rotate. The two rotating milling cutters 29 cooperate with the automatic movement of the structure itself to perform milling on both sides of the steel plate.

[0052] S5. During the edge milling process, the rolling cylinder 42 rolls counterclockwise on one side of the steel plate. When the rolling cylinder 42 rolls counterclockwise, it drives the second active bevel gear 44 and the second driven bevel gear 43 to rotate, thereby driving the guide cylinder 47 to rotate counterclockwise. The counterclockwise rotating guide cylinder 47 can drive the channel steel 32 to move forward. At the same time, the inclined metal barbs on the surface of the guide cylinder 47 can drive the traction channel steel 32 to have an inward trend when rotating. The locked rolling cylinder 42 limits the actual movement and can prevent the overall structure from deviating outward during the edge milling operation.

[0053] S6. Waste will be generated during the milling process. At this time, the unloading driver 11 is controlled to work, driving the auger 14 to rotate, and the waste limited to the inside of the lower clamping plate 4 is discharged from the discharge port 12 into the waste collecting tank 7. The waste can be collected to a certain extent.

[0054] 1. The present invention drives the milling cutter 29 connected to one end of the drive group 2 to rotate through the conventional driving operation of the drive group 2. At the same time, when the drive group 2 is driven, it can drive the first driving bevel gear 30 and the first driven bevel gear 31 installed in conjunction with the drive group 2 to engage and rotate. Through the universal joint 28 provided in connection, the other pair of first driving bevel gears 30 and the first driven bevel gear 31 are driven to rotate, thereby driving the driven shaft 25 and the milling cutter 29 connected to one end of the driven shaft 25 to rotate. The rotation of the two milling cutters 29 can simultaneously perform double-sided milling on the steel plate, thereby compensating for the practical problem of repeated adjustments required during double-sided milling.

[0055] 2. The present invention works by adjusting the electric push rod 18 to drive the connecting plate 23, the fixed cylinder 19 and the limiting slide 21 to move. The limiting slide 21 is limited by the fixed limiting slide rail 22, driving the fixed cylinder 19 to slide inside the sliding plate 20, and adjusting the height of the fixed cylinder 19 and the limiting slide 21. At the same time, the angle of the two milling cutters 29 connected to the drive group 2 and one end of the driven shaft 25 is adjusted. At this time, corresponding and flexible adjustments can be made according to the actual milling angle.

[0056] 3. The present invention determines the overall position of the channel steel 32 when adjusting the feed depth. After the position is determined, the support rod 40 and the sliding frame 41 can be locked with the help of the limit nut 38. In the actual process of milling and structure movement, the rolling cylinder 42 rolls on the surface of the steel plate, driving the second active bevel gear 44 and the second driven bevel gear 43 to rotate, thereby driving the guide cylinder 47 to roll on the steel plate. The guide cylinder 47 rolls and pulls the structure inward, cooperating with the position limit of the rolling cylinder 42 to reduce the occurrence of structure deviation and separation during the milling process, thereby improving milling accuracy.

[0057] 4. The present invention rotates the driving torque 49 and engages the transmission gear 50 to drive the threaded sleeve 26, the mounting frame 3 and the upper clamping plate 5 to move up and down, and can flexibly adjust the milling height according to the height of the steel plate;

[0058] 5. The present invention works through the unloading driver 11 to drive the auger 14 to rotate, so that the waste material inside the lower clamping plate 4 that is drawn into the barrel 10 from the slope 9 can be pulled to the discharge port 12 and then discharged, and cooperates with the waste collecting trough 7 to collect and store the waste material, effectively protecting the working environment, and at the same time reducing the accumulation of waste on the ground, which causes the structure to move and the ground to be uneven.

[0059] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. Various modifications and substitutions of the present invention will be readily apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A bevel groove milling device suitable for auxiliary welding of LNG pressure vessels, comprising a milling frame (1) and a mounting frame (3) arranged on one side of the milling frame (1), a second mounting frame (16) and a first mounting frame (17) being fixedly mounted on the inner side of the mounting frame (3), an upper clamping plate (5) being welded to one side of the mounting frame (3), and a positioning frame (8) being welded to the inner side of the upper clamping plate (5), characterized in that: The driving group (2) and the driven shaft (25) are movably mounted on the inner side of the positioning frame (8), and a transmission frame (27) is slidably connected to the inner side of the positioning frame (8) and is sleeved on the surface of the driving group (2) and the surface of the driven shaft (25). The transmission frame (27) is rotatably connected to the first driving bevel gear (30). The surfaces of the driven shaft (25) and the driving group (2) are both fixedly mounted with a first driven bevel gear (31) meshing with the first driving bevel gear (30). A universal joint (28) is provided between the two first driving bevel gears (30). A milling cutter (29) is fixedly mounted on one end of the driving group (2) and the driven shaft (25). The two milling cutters (29) for milling edges are of the same size and material. The two milling cutters (29) maintain a symmetrical position during operation. One side of the first mounting frame (17) is connected to an electric push rod for adjusting the position. Rod (18), one end of the adjustment electric push rod (18) is fixedly installed with a connecting plate (23), both ends of the connecting plate (23) are fixedly installed with symmetrical fixed cylinders (19), the interior of the fixed cylinder (19) is slidably connected with a sliding plate (20), the inner side of the sliding plate (20) is fixedly installed with a limiting slide rod (21), the surface of the limiting slide rod (21) is sleeved with a limiting slide rail (22), the limiting slide rod (21) is fixedly installed on the surface of the driving group (2) and the driven shaft (25), respectively, the limiting slide rail (22) is fixed on one end of the second mounting frame (16), the limiting slide rail (22) is an arc-shaped inclined groove structure, so that the limiting slide rod (21) can produce a height change when sliding inside the limiting slide rail (22), and the two fixed cylinders (19) are centrally symmetrical structures, so that the two limiting slide rods (21) can be adjusted simultaneously.

2. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 1 is characterized in that: A connecting sleeve (24) is fixedly mounted on the surface of the driving group (2) and the surface of the driven shaft (25), and the connecting sleeve (24) is rotatably connected to the inner side of the positioning frame (8).

3. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 1 is characterized in that: The milling frame (1) is sleeved with a screw rod (48), and there are two groups of screw rods (48). A transmission gear (50) is fixedly installed on the top of the interior of each milling frame (1) and the surface of the screw rod (48). A direction-changing gear is meshed between the two transmission gears (50), so that the transmission gear (50) and the direction-changing gear are meshed with each other. A driving torque (49) is fixedly installed on the top of one of the screw rods (48). The surfaces of the two screw rods (48) are both threadedly connected with threaded sleeves (26). The threaded sleeves (26) are fixedly installed on one side of the mounting frame (3). A positioning guide device is provided on the outer side of the upper clamping plate (5) connected to one side of the mounting frame (3).

4. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 3 is characterized in that: One side of the edge milling machine frame (1) is fixedly connected to a limiting slide groove (51), a surface of the limiting slide groove (51) is slidably connected to a limiting slider (52), and the limiting slider (52) is fixedly mounted on one side of the mounting frame (3).

5. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 3 is characterized in that: The positioning guide device comprises a channel steel (32) fixedly connected to the mounting frame (3), a mounting plate (33) is provided on one side of the channel steel (32), a limit spring (37) is fixedly installed between the mounting plate (33) and the channel steel (32), a through hole (35) is provided on the surface of the channel steel (32), a threaded rod (34) is fixedly provided on the inner side of the mounting plate (33) and is passed through the through hole (35), and a limit nut (36) is threadedly connected to the surface of the threaded rod (34), and the number of the limit nuts (36) is two and the two limit nuts (36) are respectively located at At positions inside and outside the channel steel (32), one end of the threaded rod (34) is fixedly mounted with a sliding frame (41) through a support rod (40), a rolling cylinder (42) is hinged inside the sliding frame (41), a second active bevel gear (44) is fixedly mounted on the top of the rolling cylinder (42), a second driven bevel gear (43) meshing with the second active bevel gear (44) is rotatably connected to the top of the sliding frame (41), and a guide cylinder (47) is welded to one end of the second driven bevel gear (43), and a plurality of metal barbs with the same inclination direction are opened on the surface of the guide cylinder (47).

6. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 5 is characterized in that: The connecting sleeve (38) is fixedly mounted inside the channel steel (32), and a connecting rod (39) is slidably connected inside the connecting sleeve (38), and one end of the connecting rod (39) is welded to the inner side of the mounting plate (33).

7. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 1 is characterized in that: A clamping electric push rod (15) is fixedly installed at the bottom of the mounting frame (3), the top of the clamping electric push rod (15) is connected to a lower clamping plate (4), a barrel (10) is fixedly provided at the bottom of the lower clamping plate (4), an auger (14) is rotatably connected inside the barrel (10), and a feeding driver (11) is connected to the bottom of the auger (14) and the bottom of the barrel (10).

8. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 7, characterized in that: The bottom of the lower clamping plate (4) is provided with a slope (9), a discharge port (12) is provided near the bottom of the barrel (10), and a waste collecting trough (7) is mounted on the bottom of the milling frame (1).

9. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 7, characterized in that: The surface of the mounting frame (3) is slidably connected to a clamping plate slide rail (6), and the clamping plate slide rail (6) is fixedly mounted on the surface of the lower clamping plate (4).

Images