Bevel groove edge milling device suitable for auxiliary welding of LNG pressure container

Abstract

The bevel groove edge milling device suitable for auxiliary welding of the LNG pressure container solves the problems that the workload of double-face edge milling is large, edge milling movement guiding cannot be achieved, edge milling is prone to shifting, and the edge milling accuracy is poor, the bevel groove edge milling device comprises an edge milling rack and a mounting rack, and a second mounting rack and a first mounting rack are fixedly mounted on the inner side of the mounting rack; an upper clamping plate is welded to one side of the mounting frame, a positioning frame is welded to the inner side of the upper clamping plate, a driving set 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 rotates in the transmission frame, and first driven bevel gears are arranged on the surfaces of the driven shaft and the driving set; a universal joint is arranged between the two first driving bevel gears, and a milling cutter is installed at one end of the driving set and one end of the driven shaft, the milling cutter connected with one end of the driving set is driven to rotate through conventional driving work of the driving set, and meanwhile when the driving set is driven to work, the milling cutter is driven to rotate. And the first driving bevel gear and the first driven bevel gear which are matched with the driving set can be driven to rotate in a meshed mode.

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 vessel is a special pressure vessel used to store and transport liquefied natural gas (LNG). It usually adopts a double-wall structure with good thermal insulation performance, which can keep liquefied natural gas at a low temperature (about -162℃) and a certain pressure state to reduce evaporation and ensure safety. It is also equipped with various safety devices and monitoring instruments to monitor and ensure the safe operation of the container.

[0003] When welding, it is necessary to check the surface quality of the material. There must be no defects such as cracks, pores, slag inclusions, etc. It is also necessary to debug the welding equipment, such as electric welding machines, gas protection equipment, etc., 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. Traditionally, mechanical processing or flame cutting is used to ensure that the size and shape of the groove meet the welding process requirements. Then, grinding wheels, wire brushes and other tools are used to clean impurities such as oil, rust, moisture, etc. on the groove and the surface on both sides until the metallic luster is exposed.

[0004] A milling machine is needed for mechanical processing, and 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, etc. 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 deviate due to vibration or uneven ground conditions. Deviation can lead to large milling errors, which in turn affects the accuracy of milling, as well as the quality of subsequent workpiece welding and even causes many other problems such as waste of raw materials.

[0006] On this basis, the present invention provides a bevel groove edge 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 prior art, 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 deviation of milling and poor milling accuracy.

[0008] To achieve the above object, the present invention adopts the following technical solutions: A bevel groove milling device suitable for auxiliary welding of LNG pressure vessels, comprising 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 supporting plate is welded on one side of the mounting frame, a positioning frame is welded on the inner side of the upper supporting plate, a driving group and a driven shaft are movably installed on the inner side of the positioning frame, a transmission frame which is sleeved on the surface of the driving group and the surface of the driven shaft is slidably connected on the inner side of the positioning frame, a first driving bevel gear is rotatably connected inside the transmission frame, a first driven bevel gear which 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 remain in a symmetrical position during operation.

[0009] 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.

[0010] Preferably, an adjustment electric push rod is connected to one side of the first mounting frame, a connecting plate is fixedly installed at one end of the adjustment electric push rod, symmetrical fixed cylinders are fixedly installed at both ends of the connecting plate, a sliding plate is slidably connected inside the fixed cylinder, a limiting slide rod is fixedly installed on the inner side of the sliding plate, the surface of the limiting slide rod is sleeved on the limiting slide rail, the limiting slide rod is fixedly installed on the surface of the driving group and the driven shaft respectively, the limiting slide rail is fixed at one end of the second mounting frame, 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 centrally symmetrical structures, so that the two limiting slide rods can be adjusted at the same time.

[0011] 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 meshed between the two transmission gears so that the transmission gear and the changing gear are meshed 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 supporting plate connected to one side of the mounting frame.

[0012] 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.

[0013] Preferably, the positioning and guiding device comprises a channel steel fixedly connected to the mounting frame, 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 opened on the surface of the channel steel, a threaded rod penetrating the inside of the through hole is fixedly provided on the inner side of the mounting plate, a limit nut is threadedly connected to the surface of the threaded rod, the number of the limit nuts is two and the two limit nuts are respectively located at the inside and outside of the channel steel, one end of the threaded rod is fixedly installed with a sliding frame through a support rod, a rolling cylinder is hinged inside the sliding frame, a second active bevel gear is fixedly installed on the top of the rolling cylinder, and a second driven bevel gear meshing with the second active bevel gear is rotatably connected to the top of the sliding frame, a guide cylinder is welded on one end of the second driven bevel gear, and a plurality of metal barbs with the same inclination direction are opened on the surface of the guide cylinder.

[0014] 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.

[0015] Preferably, a supporting electric push rod is fixedly installed at the bottom of the mounting frame, the top of the supporting electric push rod is connected to a lower supporting plate, a barrel is fixedly arranged at the bottom of the lower supporting plate, an auger is rotatably connected inside the barrel, and a material discharge drive is connected to the bottom end of the auger and the bottom of the barrel.

[0016] Preferably, a slope is provided at the bottom of the lower supporting plate, a discharge port is provided near the bottom end of the barrel, and a waste collecting trough is mounted at the bottom of the milling machine frame.

[0017] Preferably, the surface of the mounting frame is slidably connected with a supporting plate slide rail, and the supporting plate slide rail is fixedly installed on the surface of the lower supporting plate.

[0018] The present invention has the following technical effects.

[0019] 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 cooperation with the driving group to engage and rotate. Through the universal joint arranged 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 perform double-sided edge milling on the steel plate at the same time, thereby making up for the practical problem of repeated adjustments required during double-sided edge milling.

[0020] 2. The present invention works by adjusting the electric push rod to drive the connecting plate, the fixed cylinder and the limit slide bar to move. The limit slide bar 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 bar. At the same time, the angle of the two milling cutters connected to the driving group and one end of the driven shaft can be adjusted. At this time, corresponding and flexible adjustments can be made according to the actual milling angle.

[0021] 3. The present invention determines the overall position of the channel steel when adjusting the feed depth. After the 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 to reduce the displacement and separation of the structure during the milling process, thereby providing milling accuracy.

[0022] 4. The present invention drives the threaded sleeve, the mounting frame and the upper supporting plate to rise and fall 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.

[0023] 5. The present invention works through the material discharge driver to drive the auger to rotate, so that the waste material that is drawn into the barrel from the slope inside the lower supporting plate can be pulled to the discharge port position and then discharged, and the waste material can be collected and stored in conjunction with the waste collecting trough, effectively protecting the working environment, while reducing the accumulation of waste material on the ground, causing the structure to move and the ground to be uneven. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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: Figure 1 It is a side structural schematic diagram of the present invention.

[0025] Figure 2 It is a schematic diagram of the side cross-sectional structure of the present invention.

[0026] Figure 3 It is an enlarged structural schematic diagram of the driving group, the driven shaft and the milling cutter in the present invention.

[0027] Figure 4 It is a schematic diagram of the top structure of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure of the guiding device in the present invention.

[0029] Figure 6 It is a front view structural schematic diagram of the present invention.

[0030] Figure 7 It is a schematic diagram of the front cross-sectional structure of the present invention.

[0031] Reference numerals: 1. Milling frame; 2. Drive group; 3. Mounting frame; 4. Lower supporting plate; 5. Upper supporting plate; 6. Supporting plate slide rail; 7. Waste collecting trough; 8. Positioning frame; 9. Slope; 10. Barrel; 11. Unloading drive; 12. Discharge port; 13. Unloading shaft; 14. Auger; 15. Supporting electric push rod; 16. Second mounting frame; 17. First mounting frame; 18. Adjusting electric push rod; 19. Fixed barrel; 20. Sliding plate; 21. Limiting slide rod; 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 matching shaft; 46. First matching shaft; 47. Guide cylinder; 48. Screw; 49. Driving torque; 50. Transmission gear; 51. Limiting slide groove; 52. Limiting slider. DETAILED DESCRIPTION

[0032] The above and other technical contents, features and effects of the present invention are described in detail 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 drawings in the specification.

[0033] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0034] The present invention is a bevel groove edge 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 supporting 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 supporting 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 to the driving shaft through the belt pulley. The shaft, outer sleeve, etc. are adjusted as a whole, the driving shaft is connected to the subsequent milling cutter 29, the driving motor is connected to the power supply and the controller, and the conventional milling machine assists the milling cutter 29 to rotate and the overall structure to move the plate edge when in use. In the present invention, the inner side of the positioning frame 8 is slidably connected with a transmission frame 27 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 with 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 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 arranged 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 arranged to provide a guarantee for simultaneous milling edges. 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 are kept adjusted within a suitable trajectory.

[0035] 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.

[0036] As an embodiment, an adjustment electric push rod 18 is connected to one side of the first mounting frame 17, and the adjustment electric push rod 18 is connected to a power supply and a controller. The adjustment electric push rod 18 can provide a driving force for adjusting the connecting plate 23. A connecting plate 23 is fixedly installed at one end of the adjustment electric push rod 18, and symmetrical fixed cylinders 19 are fixedly installed at both ends of the connecting plate 23. 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 limit slide rod 21 is fixedly installed on the inner side of the sliding plate 20. The surface of the limit slide rod 21 is sleeved with a limit slide rail 22. The limit slide rail 22 is the limit slide bar 21 for auxiliary limiting and at the same time for the driving group 2 and the driven shaft 25 connected to the limit slide bar 21, so that the driving group 2 and the driven shaft 25 are adjusted within the set track, the limit slide bar 21 is fixedly mounted on the surface of the driving group 2 and the driven shaft 25 respectively, the limit slide rail 22 is fixed at one end of the second mounting frame 16, the limit slide rail 22 is an arc-shaped inclined groove structure, so that the limit slide bar 21 can produce a height change when sliding inside the limit slide rail 22, the two fixed cylinders 19 are a central symmetrical structure, so that the two limit slide bars 21 can be adjusted at the same time, 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 .

[0037] 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 limit slide bar 21 will slide inside the fixedly installed limit slide rail 22. The limit slide rail 22 is an arc-shaped inclined groove structure, and the limit slide bar 21 will slide inside the sliding plate 20, changing the height of the driving group 2 and the driven shaft 25 connected to the limit slide bar 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.

[0038] As an embodiment, a screw rod 48 is sleeved on the edge milling frame 1, and there are two groups of screw rods 48. A transmission gear 50 is fixedly installed on the top of each edge 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 port 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 A driving twist 49 is fixedly installed on the top of 8, and the driving twist 49 is configured to assist manual driving, which can reduce the use of energy while assisting adjustment. The surfaces of the two screw rods 48 are threadedly connected with threaded sleeves 26, and the threaded sleeves 26 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, and a positioning guide device is provided on the outer side of the upper supporting plate 5 connected to one side of the mounting frame 3. A limiting slide groove 51 is fixedly connected to one side of the milling machine frame 1, and a limiting slider 52 is slidably connected to the surface of the limiting slide groove 51, and the limiting slider 52 is fixedly installed on one side of the mounting frame 3.

[0039] 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 can be engaged 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.

[0040] As an embodiment, the positioning and guiding 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 arranged 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 penetrating the inside of the through hole 35 is fixedly arranged on the inner side of the mounting plate 33, a limit nut 36 is threadedly connected to the surface of the threaded rod 34, the limit nut 36 can lock and protect the adjusted threaded rod 34, there are two limit nuts 36 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 rolling cylinder 42. A rolling cylinder 42 is hinged inside the sliding frame 41, and the rolling cylinder 42 can contact one side of the steel plate to assist in limiting the work. A second active bevel gear 44 is fixedly installed on the top of the rolling cylinder 42. The top of the sliding frame 41 is rotatably connected to a second driven bevel gear 43 that 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 cylinder 47 to roll and assist in guiding the positioning work. A guide cylinder 47 is welded at one end of the second driven bevel gear 43, and a plurality of metal barbs with the same inclination direction are provided on the surface of the guide cylinder 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, and one end of the connecting rod 39 is welded to the inner side of the mounting plate 33.

[0041] In this embodiment, during the adjustment stage, the present invention is pushed forward as a whole, and the upper supporting plate 5 and the lower supporting plate 4 are moved forward to move the plate between the upper supporting plate 5 and the lower supporting plate 4. At this time, the plate is against the rolling cylinder 42. According to the size and depth of the milling edge, after adjusting the feed depth, the two limit nuts 36 can be rotated to approach each other. 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 and other structures 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 driven 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 of the guide cylinder 47, the steel plate is provided with an inward constraint force by means of the barbs, and the rolling cylinder 42 is locked to prevent it from actually moving inward, thereby guiding and positioning the movement of the structure.

[0042] As an embodiment, a supporting electric push rod 15 is fixedly installed at the bottom of the mounting frame 3, and the supporting electric push rod 15 is connected to a power supply and a controller. The setting of the supporting electric push rod 15 can assist in adjusting the height of the lower supporting plate 4. A plurality of transmission rollers are rotatably installed on the lower supporting plate 4, so that the structure can adapt to steel plates of different sizes and thicknesses. The top of the supporting electric push rod 15 is connected to the lower supporting plate 4, and a barrel 10 is fixedly installed at the bottom of the lower supporting plate 4. The barrel 10 is used for storage and limit protection of waste materials, and a screw 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 a power supply and a controller. The unloading driver 11 provides driving force for the unloading work. A slope 9 is provided at the bottom of the lower supporting 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 of the barrel 10. The surface of the mounting frame 3 is slidably connected to a supporting plate slide rail 6, and the supporting plate slide rail 6 is fixedly installed on the surface of the lower supporting plate 4.

[0043] In this embodiment, during the actual milling work, the waste generated by the 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 work is in progress, 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 of 12 and fall into 7 for storage.

[0044] Working principle: S1. When double-sided milling of a steel plate is performed, first, according to the milling angle, the electric push rod 18 is controlled and adjusted to work, driving the connecting plate 23 and the fixed cylinder 19 to move, and at the same time, the fixed cylinder 19 pushes the limit slide bar 21 to rise and fall inside the fixed limit slide rail 22, and the rising and falling limit slide bar 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; S2. After the angle is adjusted, the two screws 48 can be driven to rotate simultaneously by rotating the driving knob 49 according to the height of the steel plate and cooperating with the transmission between the transmission gears 50. The threaded sleeve 26 on the surface of the screw 48 rises and falls in the installation direction of the screw 48, thereby driving the mounting frame 3 and the upper supporting plate 5 to rise and fall, and adjusting the upper supporting plate 5 to a suitable position on the top of the steel plate; S3. After adjusting the height, the device can be adjusted toward the steel plate according to the cutting 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, and the support rod 40 and the sliding frame 41 are locked and protected. Then the supporting electric push rod 15 is started to push the lower supporting plate 4 upward so that the transmission roller on the lower supporting plate 4 contacts the plate. S4. When it is necessary to perform edge 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 another 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 edge milling on both sides of the steel plate. S5. During the edge milling movement, 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, and the locked rolling cylinder 42 limits the actual movement to prevent the overall structure from deviating outward during the edge milling operation. S6. Waste will be generated during the milling process. At this time, the material discharge driver 11 is controlled to work, driving the auger 14 to rotate, and the waste limited to the inside of the lower supporting plate 4 is discharged from the discharge port 12 into the waste collecting tank 7. The waste can be collected to a certain extent.

[0045] 1. The present invention drives the milling cutter 29 connected to one end of the driving group 2 to rotate through the conventional driving operation of the driving group 2. At the same time, when the driving group 2 is driving, it can drive the first driving bevel gear 30 and the first driven bevel gear 31 installed in cooperation with the driving group 2 to mesh and rotate. Through the universal joint 28 provided in connection, another pair of the first driving bevel gear 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 two milling cutters 29 rotate, and can simultaneously perform double-sided milling of the steel plate, thereby making up for the practical problem that repeated adjustments are required during double-sided milling. 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 bar 21 to move. The limiting slide bar 21 is limited by the fixedly installed 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 bar 21. At the same time, the angle of the two milling cutters 29 connected to the driving group 2 and one end of the driven shaft 25 is adjusted. At this time, the angle can be adjusted accordingly and flexibly according to the actual milling angle; 3. The present invention determines the overall position of the channel steel 32 when adjusting the feed depth. After the determination, the support rod 40 and the sliding frame 41 can be locked with the help of the limit nut 38. In the 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 to move inward, and cooperates with the limit of the rolling cylinder 42 to reduce the occurrence of deviation and separation of the structure during the milling process, thereby providing milling accuracy. 4. The present invention drives the threaded sleeve 26, the mounting frame 3 and the upper supporting plate 5 to move up and down by rotating the driving torque 49 and meshing the transmission gear 50, and can flexibly adjust the milling edge height according to the height of the steel plate; 5. The present invention works through the material discharge driver 11 to drive the auger 14 to rotate, so that the waste material inside the lower supporting 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.

[0046] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as limiting the present invention. After reading the above content, various modifications and substitutions of the present invention will be obvious to those skilled in the art. Therefore, the protection scope of the present invention should be defined by the attached 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 supporting plate (5) being welded on one side of the mounting frame (3), and a positioning frame (8) being welded on the inner side of the upper supporting plate (5), characterized in that: A driving group (2) and a driven shaft (25) are movably mounted on the inner side of the positioning frame (8); a transmission frame (27) sleeved on the surface of the driving group (2) and the surface of the driven shaft (25) is slidably connected to the inner side of the positioning frame (8); a first driving bevel gear (30) is rotatably connected inside the transmission frame (27); a first driven bevel gear (31) meshing with the first driving bevel gear (30) is fixedly mounted on the surfaces of the driven shaft (25) and the driving group (2); a universal joint (28) is arranged 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, and the two milling cutters (29) are kept in a symmetrical position during operation.

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: One side of the first mounting frame (17) is connected to an adjustment electric push rod (18), one end of the adjustment electric push rod (18) is fixedly mounted with a connecting plate (23), both ends of the connecting plate (23) are fixedly mounted with symmetrical fixed cylinders (19), the interior of the fixed cylinder (19) is slidably connected with a sliding plate (20), a limit slide rod (21) is fixedly mounted inside the sliding plate (20), the surface of the limit slide rod (21) is sleeved with a limit slide rail (22), the limit slide rod (21) is fixedly mounted on the surface of the driving group (2) and the driven shaft (25), respectively, the limit slide rail (22) is fixed to one end of the second mounting frame (16), the limit slide rail (22) is an arc-shaped inclined groove structure, so that the limit slide rod (21) can produce a height change when sliding inside the limit slide rail (22), and the two fixed cylinders (19) are centrally symmetrical structures, so that the two limit slide rods (21) can be adjusted simultaneously.

4. 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 mounted on the top of the interior of each milling frame (1) and on 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 mounted 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), and the threaded sleeves (26) are fixedly mounted on one side of the mounting frame (3). A positioning guide device is arranged on the outer side of an upper supporting plate (5) connected to one side of the mounting frame (3).

5. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 4 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).

6. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 4 is characterized in that: The positioning guide device comprises a channel steel (32) fixedly connected to the mounting frame (3), a mounting plate (33) being arranged at one side of the channel steel (32), a limit spring (37) being fixedly installed between the mounting plate (33) and the channel steel (32), a through hole (35) being opened on the surface of the channel steel (32), a threaded rod (34) penetrating the interior of the through hole (35) being fixedly arranged on the inner side of the mounting plate (33), a limit nut (36) being threadedly connected to the surface of the threaded rod (34), the number of the limit nuts (36) being two and the two limit nuts (36) being 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), 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).

7. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 6 is characterized in that: The connecting sleeve (38) is fixedly mounted inside the channel steel (32), 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).

8. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 1 is characterized in that: A supporting electric push rod (15) is fixedly mounted at the bottom of the mounting frame (3); the top of the supporting electric push rod (15) is connected to a lower supporting plate (4); a barrel (10) is fixedly arranged at the bottom of the lower supporting plate (4); an auger (14) is rotatably connected inside the barrel (10); and a material discharge driver (11) is connected to the bottom end of the auger (14) and the bottom of the barrel (10).

9. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 8, characterized in that: The bottom of the lower supporting 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 edge milling frame (1).

10. The bevel groove milling device suitable for auxiliary welding of LNG pressure vessels according to claim 8, characterized in that: The surface of the mounting frame (3) is slidably connected to a support plate slide rail (6), and the support plate slide rail (6) is fixedly mounted on the surface of the lower support plate (4).

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