Port polishing device for ship pipe fitting machining

Abstract

The invention relates to the field of polishing devices, in particular to a port polishing device for ship pipe fitting machining. The grinding device comprises a rack, a clamping mechanism and a grinding mechanism. The clamping mechanism is arranged on the rack and used for horizontally clamping a pipe fitting; the grinding mechanism comprises a mounting seat, a fixed disc and a motor I which are arranged on the mounting seat, a rotating cylinder connected with the output end of the motor I, and two groups of grinding assemblies which are symmetrically distributed relative to the rotating cylinder, and the fixed disc is provided with a guide groove which is annularly distributed in a wavy shape; the grinding assembly comprises a sliding column, a moving rod, a clamping table, a threaded rotary knob and a grinding table; the sliding column is arranged on the rotating drum in a sliding manner and is provided with a plurality of clamping grooves which are distributed side by side in the length direction; the moving rod is arranged on the sliding column; the clamping table is clamped in the clamping grooves in a sliding manner; the end of the moving rod is slidably arranged in the guide groove. The position of the polishing table can be correspondingly adjusted according to the diameter of a pipe fitting, the load is small and light, and more energy is saved in the polishing process.

Description

Technical Field

[0001] The present invention relates to the field of grinding devices, and particularly to a port grinding device for ship pipe fitting processing. Background Art

[0002] During the ship production process, a large number of metal pipe fittings are required, and the ports of the pipe fittings need to be ground using a grinding device.

[0003] Chinese Patent Publication No. CN217167816U discloses a port grinding device for ship pipe fitting processing, including a base. A motor base is fixedly connected to the upper end of the base, a motor is arranged on the motor base, a grinding disc is arranged on the output shaft of the motor, a support base is fixedly connected to the upper end of the base, a pipe fitting is slidably connected in the support base, a movable groove is formed in the support base, a sliding rod is slidably connected in the movable groove, and a backing plate is fixedly connected to the top of the sliding rod. This device can fix the pipe fitting to prevent the port of the pipe fitting from warping during the grinding process.

[0004] However, the above technical solution has the following deficiencies: When using a single grinding disc to grind the port of the pipe fitting, regardless of the diameter of the pipe fitting, as long as it is within the diameter range of the grinding disc, it can be ground. However, if the diameter of the pipe fitting is very small, if a larger and heavier grinding disc is still used to grind the pipe fitting, the grinding disc, as a load, consumes more energy, the power consumption of the motor is large, and it is not energy-saving. Summary of the Invention

[0005] The object of the present invention is to address the problems in the background art and propose a port grinding device for ship pipe fitting processing, which can adjust the position of the grinding table corresponding to the diameter of the pipe fitting, has a smaller and lighter load, and is more energy-saving during the grinding process.

[0006] The technical solution of the present invention is a port grinding device for ship pipe fitting processing, including a frame, a clamping mechanism, and a grinding mechanism. The clamping mechanism is arranged on the frame to horizontally clamp the pipe fitting. The grinding mechanism includes a mounting seat, a fixed disc and a first motor arranged on the mounting seat, a rotating cylinder connected to the output end of the first motor, and two groups of grinding components symmetrically distributed about the rotating cylinder. The fixed disc has a guiding groove distributed in an annular wavy shape. The grinding component includes a sliding column slidably arranged on the rotating cylinder and having a plurality of card slots arranged side by side along the length direction, a moving rod arranged on the sliding column, a clamping platform slidably clamped in the card slot, a threaded knob threadedly connected to the clamping platform and pressing against the sliding column, and a grinding table arranged at the front end of the clamping platform. The end of the moving rod is slidably arranged in the guiding groove.

[0007] Preferably, the clamping mechanism includes a table horizontally arranged on the frame, a bracket arranged on one side of the frame, a slide rod vertically slidably arranged on the bracket, a screw rod parallel to the slide rod and threadedly connected to the bracket, a crank handle connected to the top end of the screw rod, and a pressing table arranged at the bottom end of the slide rod. The pressing table is rotatably connected to the bottom end of the screw rod.

[0008] Preferably, the top of the table has a first arc-shaped groove, and the bottom of the pressing table has a second arc-shaped groove facing the first arc-shaped groove.

[0009] Preferably, a lifting mechanism for adjusting the height of the grinding mechanism is arranged on the frame. The lifting mechanism includes a mounting cover arranged on the frame, a lead screw vertically distributed and rotatably arranged on the mounting cover, a slide rail vertically arranged in the mounting cover, a lifting table threadedly connected to the lead screw and slidably arranged on the slide rail, and a second motor arranged on the mounting cover and drivingly connected to the lead screw. The mounting seat is arranged on the lifting table, and the mounting cover has a lifting channel for the lifting table to pass through.

[0010] Preferably, the radial distance from one end of the inner side of the grinding table to the central axis of the fixed disk is less than the radial distance from the inner wall of the pipe fitting to the central axis of the fixed disk, and the radial distance from the other end of the outer side of the grinding table to the central axis of the fixed disk is greater than the radial distance from the outer wall of the pipe fitting to the central axis of the fixed disk.

[0011] Preferably, the side surface of the rotating cylinder has an air inlet, and the front surface has an air outlet. An air inlet pipe is communicated at the air inlet, and a one-way valve for unidirectionally introducing air into the rotating cylinder is arranged on the air inlet pipe. The air outlet is communicated with a three-way pipe, and the other two ends of the three-way pipe are both communicated with an air outlet assembly. The air outlet assembly includes an air delivery pipe communicated with the three-way pipe and an air outlet pipe slidably and sealingly communicated with the air delivery pipe. A one-way valve for unidirectionally ventilating to the air outlet pipe is arranged on the air delivery pipe. The air outlet end of the air outlet pipe faces the outer side surface of the grinding table, and the air outlet pipe is arranged through the clamping table.

[0012] Preferably, the air outlet pipe is an "L"-shaped tubular structure, and the end is in the form of a Venturi tube structure.

[0013] Preferably, the outer end of the air delivery pipe has a flared portion, a sealing ring is clamped inside the flared portion, the air outlet pipe passes through the sealing ring and is slidably and sealingly connected to the sealing ring. The outer peripheral surface of the flared portion has an external thread, and a limit cover is threadedly connected to the flared portion through the external thread. The limit cover is pressed against the outer end of the sealing ring, and the limit cover has a through hole for the air outlet pipe to pass through.

[0014] Preferably, a shielding cover is arranged on the rotating cylinder. One axial end of the shielding cover is open, and the other axial end has two symmetrically distributed movable channels. The guide groove is located inside the shielding cover, and a baffle is arranged on the moving rod. The baffle blocks the outside of the movable channel.

[0015] Preferably, a blanking box is arranged on the frame. The top end of the blanking box is open, the middle of the top end is concave, and one side of the lower part has an opening. A collecting box is slidably arranged at the opening. The collecting box is located below the grinding table, and a handle is arranged on the collecting box.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention can adjust the position of the grinding table corresponding to the diameter of the pipe fitting, with a smaller and lighter load, more energy-efficient during the grinding process, and will not cause excessive energy consumption of the motor. Through the combined movement of the circumferential movement and radial reciprocating movement of the moving rod at the guiding groove, the grinding table can vibrate during rotation, which is beneficial to improving the utilization rate of the grinding table and shaking off the debris remaining on the grinding table, ensuring the grinding quality of the pipe fitting port by the grinding table. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a partial structural cross-sectional view of an embodiment of the present invention; Figure 3 is a partial structural exploded view of an embodiment of the present invention; Figure 4 is a partial structural cross-sectional view of the sliding seal connection of the gas transmission pipe and the gas outlet pipe through a sealing ring; Figure 5 is a schematic diagram of the structure for collecting waste chips.

[0018] Reference numerals: 1, frame; 2, support table; 3, bracket; 4, pressing table; 5, screw; 6, crank; 7, sliding rod; 8, fixed disk; 801, guiding groove; 9, moving rod; 10, baffle; 11, shield; 111, movable channel; 12, rotating cylinder; 121, air inlet; 122, air outlet; 13, sliding column; 131, clamping groove; 14, clamping platform; 15, threaded knob; 16, grinding table; 17, tee; 18, check valve I; 19, gas transmission pipe; 20, check valve II; 21, sealing ring; 22, limit cover; 23, gas outlet pipe; 24, motor I; 25, mounting seat; 26, mounting cover; 27, motor II; 28, lead screw; 29, lifting platform; 30, slide rail; 31, blanking box; 32, collection box; 33, handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Embodiment 1 As Figures 1 - 5 shown, a port grinding device for ship pipe fitting processing proposed in this embodiment includes a frame 1, a clamping mechanism, and a grinding mechanism.

[0020] The clamping mechanism is arranged on the frame 1 and is used for horizontally clamping the pipe fittings. The clamping mechanism includes a support table 2 horizontally arranged on the frame 1, a bracket 3 arranged on one side of the frame 1, a sliding rod 7 vertically slidably arranged on the bracket 3, a screw rod 5 parallel to the sliding rod 7 and threadedly connected to the bracket 3, a crank 6 connected to the top end of the screw rod 5, and a pressing table 4 arranged at the bottom end of the sliding rod 7. The pressing table 4 is rotatably connected to the bottom end of the screw rod 5. After placing the pipe fitting to be polished on the support table 2, rotate the crank 6. The crank 6 drives the screw rod 5 to rotate downward. The screw rod 5 drives the pressing table 4 to move, and the pressing table 4 presses tightly on the top of the pipe fitting. The sliding rod 7 is used to guide the lifting of the pressing table 4. Multiple groups of the bracket 3, the pressing table 4, the screw rod 5, the crank 6 and the sliding rod 7 can be arranged side by side, so as to clamp the pipe fitting at multiple positions through the pressing table 4 and improve the firmness of the pipe fitting fixation. The top of the support table 2 has an arc-shaped groove 1, and the bottom of the pressing table 4 has an arc-shaped groove 2 facing the arc-shaped groove 1. The arc-shaped groove 2 and the arc-shaped groove 1 are vertically aligned. The pipe fitting can be horizontally clamped between the arc-shaped groove 1 and the arc-shaped groove 2. The clamping mechanism is applicable to the clamping of pipe fittings with different diameters and has a large application range.

[0021] The polishing mechanism includes a mounting base 25, a fixed disk 8 and a motor 1 24 arranged on the mounting base 25, a rotating cylinder 12 connected to the output end of the motor 1 24, and two groups of polishing components symmetrically distributed with respect to the rotating cylinder 12. The output end of the motor 1 24 passes through the hole reserved on the fixed disk 8 to drive the rotating cylinder 12 to rotate. The rotating cylinder 12 drives the two groups of polishing components to rotate. The two groups of polishing components are symmetrically distributed and can rotate evenly. The polishing component includes a sliding column 13 slidably arranged on the rotating cylinder 12 and having a plurality of card slots 131 arranged side by side along the length direction, a moving rod 9 arranged on the sliding column 13, a clamping table 14 slidably clamped in the card slot 131, a threaded knob 15 threadedly connected to the clamping table 14 and abutted against the sliding column 13, and a polishing table 16 arranged at the front end of the clamping table 14. The distances from the card slots 131 at different positions on the sliding column 13 to the central axis of the fixed disk 8 are different. The sliding column 13 has an insertion channel communicating with the card slot 131. The threaded knob 15 can pass through the insertion channel and be threadedly screwed into the clamping table 14. The clamping table 14 has corresponding internal threads. By adjusting the position where the clamping table 14 is clamped in different card slots 131, the position adjustment of the polishing table 16 is realized, that is, the adjustment of the distance between the two polishing tables 16, so as to be applicable to the polishing of pipe fittings with different diameters. When adjusting the position of the clamping table 14, first unscrew the threaded knob 15 from the clamping table 14, then insert the clamping table 14 into the card slot 131 at other positions, and then screw the threaded knob 15 into the clamping table 14 and abut it against the side of the sliding column 13.

[0022] As Figures 1 - 3As shown, the fixed disk 8 has a guiding groove 801 distributed in an annular wavy shape. The end of the moving rod 9 is slidably arranged in the guiding groove 801. When the grinding assembly rotates with the rotating cylinder 12, the moving rod 9 moves in a circular wavy shape along the trajectory of the guiding groove 801 at the guiding groove 801, that is, it has a compound motion of circular and radial directions. When the sliding column 13 makes a circular motion, the moving rod 9 will drive the sliding column 13 to reciprocate radially, that is, the sliding column 13 reciprocates and vibrates, so as to drive the grinding table 16 to make a radial reciprocating motion when making a circular motion through the clamping table 14. When the grinding table 16 grinds the port of the pipe fitting, the area on the side of the grinding table 16 for grinding can be utilized in a larger range, with high utilization rate. And after grinding the port of the pipe fitting in some areas on the grinding table 16, grinding debris will remain on the surface of these areas. With the circular vibration reciprocating movement of the grinding table 16, on the one hand, the vibration of the grinding table 16 can be used to shake off the debris, and on the other hand, the pipe fitting can be used to reversely grind off the residual debris in the above-mentioned partial areas in the subsequent process, preventing the surface of the grinding table 16 from being too smooth due to excessive debris residue and preventing the reduction of the grinding quality of the grinding table 16.

[0023] As Figures 1 - 3 shown, a shield 11 is arranged on the rotating cylinder 12, and the output end of the first motor 24 penetrates through the shield 11. One axial end of the shield 11 is open, and the other axial end has two symmetrically distributed moving channels 111. The guiding groove 801 is located inside the shield 11, and a baffle 10 is arranged on the moving rod 9, and the baffle 10 blocks outside the moving channel 111. When the rotating cylinder 12 rotates, it can drive the shield 11 to rotate. When the moving rod 9 moves at the guiding groove 801, it drives the baffle 10 to move. The baffle 10 blocks at the moving channel 111, which can prevent the debris generated when the grinding table 16 grinds the port of the pipe fitting from entering the inside of the guiding groove 801 and prevent it from affecting the guiding of the guiding groove 801 to the moving rod 9.

[0024] As Figure 1 and Figure 5 shown, a blanking box 31 is arranged on the frame 1. The top of the blanking box 31 is open, and the middle of the top is concave. The blanking box 31 can be designed with a larger size to cover the falling range of the debris. One side of the lower part of the blanking box 31 has an opening. A collecting box 32 is slidably arranged at the opening of the blanking box 31. The collecting box 32 is located below the grinding table 16, and a handle 33 is arranged on the collecting box 32. The debris generated when the grinding table 16 grinds the port of the pipe fitting can fall into the blanking box 31 and further fall into the collecting box 32. By pulling the handle 33 outwards, the collecting box 32 can be pulled outwards, so as to facilitate the centralized cleaning of the metal debris collected in the collecting box 32.

[0025] This embodiment can adjust the position of the grinding table 16 according to the diameter of the pipe fitting, with a smaller and lighter load, and more energy-efficient during the grinding process. Determine the target position that the grinding table 16 needs to adjust according to the specific diameter of the pipe fitting. The two grinding tables 16 evenly grind the port of the pipe fitting. The grinding assembly is light in weight and will not cause excessive energy consumption of the motor one 24. Through the combined movement of the circumferential movement and the radial reciprocating movement of the moving rod 9 at the guide groove 801, the grinding table 16 can vibrate during rotation, which is beneficial to improving the utilization rate of the grinding table 16 and shaking off the debris remaining on the grinding table 16, ensuring the grinding quality of the port of the pipe fitting by the grinding table 16.

[0026] Embodiment Two As Figures 1 - 5 As shown, a port grinding device for ship pipe fitting processing proposed in this embodiment. Compared with Embodiment One, in this embodiment, a lifting mechanism for adjusting the height of the grinding mechanism is provided on the frame 1. The lifting mechanism includes a mounting cover 26 provided on the frame 1, a lead screw 28 vertically distributed and rotatably provided on the mounting cover 26, a slide rail 30 vertically provided in the mounting cover 26, a lifting table 29 threadedly connected to the lead screw 28 and slidably provided on the slide rail 30, and a motor two 27 provided on the mounting cover 26 and drivingly connected to the lead screw 28. The output end of the motor two 27 can rotate forward and backward, so as to drive the lead screw 28 to rotate forward and backward. The lead screw 28 drives the lifting table 29 to lift and lower, and is guided in the vertical direction through the slide rail 30. The mounting seat 25 is provided on the lifting table 29. The mounting cover 26 has a lifting channel for the lifting table 29 to pass through. When the lifting table 29 lifts and lowers, it can drive the mounting seat 25 to lift and lower, so as to realize the lifting of the grinding mechanism and further expand the applicable range of grinding pipe fittings.

[0027] In this embodiment, the height of the grinding mechanism is adjusted through the lifting mechanism. If the diameter of the pipe fitting is large, the grinding mechanism can be raised. If the diameter of the pipe fitting is small, the grinding mechanism can be lowered, so as to effectively grind the port of the pipe fitting by using the two grinding tables 16.

[0028] Embodiment Three As Figures 1 - 5As shown in the figure, a port grinding device for ship pipe fitting processing proposed in this embodiment. Compared with Embodiment 1 or Embodiment 2, in this embodiment, the radial distance from one end inside the grinding table 16 to the central axis of the fixed disk 8 is less than the radial distance from the inner wall of the pipe fitting to the central axis of the fixed disk 8, and the radial distance from the outer end of the grinding table 16 to the central axis of the fixed disk 8 is greater than the radial distance from the outer wall of the pipe fitting to the central axis of the fixed disk 8. When using the grinding table 16 to grind the port of the pipe fitting, it is not necessary for the pipe fitting and the fixed disk 8 to be in a coaxial state. As long as the two grinding tables 16 can cover the range of the pipe fitting port for grinding, the best state is that the pipe fitting is not coaxial with the fixed disk 8. This condition is easier to meet, and under this condition, a larger range of the grinding area on the grinding table 16 can be utilized, further improving the utilization rate of the grinding table 16.

[0029] Embodiment 4 As Figures 1 - 5 shown in the figure, a port grinding device for ship pipe fitting processing proposed in this embodiment. Compared with Embodiment 1, in this embodiment, the side of the rotating cylinder 12 has an air inlet 121, and the front has an air outlet 122. An air inlet pipe is connected to the air inlet 121, and a one-way valve 18 for one-way air intake into the rotating cylinder 12 is provided on the air inlet pipe. The air outlet 122 is connected to a three-way pipe 17, and the other two ends of the three-way pipe 17 are both connected to an air outlet assembly. The air outlet assembly includes an air delivery pipe 19 connected to the three-way pipe 17 and an air outlet pipe 23 slidingly and sealingly connected to the air delivery pipe 19. A one-way valve 20 for one-way air passage into the air outlet pipe 23 is provided on the air delivery pipe 19. The air outlet end of the air outlet pipe 23 faces the outer side of the grinding table 16, and the air outlet pipe 23 is disposed through the clamping table 14. When the rotating cylinder 12 rotates, the sliding column 13 rotates and has a reciprocating movement along the radial direction of the fixed disk 8, so as to drive the air outlet pipe 23 to rotate and reciprocate radially through the clamping table 14. When the air outlet pipe 23 slides outwards, the one-way valve 20 closes and the one-way valve 18 opens, and the outside air enters the rotating cylinder 12 through the air inlet pipe. When the air outlet pipe 23 slides inwards, the one-way valve 18 closes and the one-way valve 20 opens, and the air in the rotating cylinder 12 enters the air outlet pipe 23 through the air delivery pipe 19 and is blown towards the outer side of the grinding table 16 through the air outlet end of the air outlet pipe 23, blowing away the debris attached to the outer side of the grinding table 16 when grinding the port of the pipe fitting, realizing the cleaning of the grinding table 16 and ensuring the grinding quality of the grinding table 16.

[0030] To prevent debris or other sundries in the outside air from entering the air inlet pipe and the air outlet pipe 23, filters are provided at the inlet of the air inlet pipe and the outlet of the air outlet pipe 23.

[0031] As Figure 2 and Figure 4 shown in the figure, the air outlet pipe 23 is an "L"-shaped tubular structure, and the end is in the form of a Venturi tube structure. Then, after the air is discharged from the air outlet pipe 23, the flow rate increases, making it easier to blow away the remaining debris on the grinding table 16.

[0032] As Figure 4 shown, the outer end of the gas pipeline 19 has a flared portion, and a sealing ring 21 is clamped inside the flared portion. The air outlet pipe 23 passes through the sealing ring 21 and is slidably and sealingly connected to the sealing ring 21, and the slidable and sealing connection is achieved through the sealing ring 21. The outer peripheral surface of the flared portion of the gas pipeline 19 has an external thread, and a limit cover 22 is threadedly connected to the flared portion through the external thread. The limit cover 22 is pressed against the outer end of the sealing ring 21, and the limit cover 22 has a through hole for the air outlet pipe 23 to pass through. After the limit cover 22 is screwed onto the flared portion of the gas pipeline 19, the sealing ring 21 can be pressed tightly inside the flared portion, preventing the sealing ring 21 from being dragged out due to the reciprocating sliding of the air outlet pipe 23 and avoiding the detachment of the sealing ring 21.

[0033] In this embodiment, the reciprocating sliding during the circular motion of the sliding column 13 is utilized for air extraction and exhaust, and the outer side surface of the grinding table 16 is blown with air to clean the debris remaining on the outer side surface when the grinding table 16 grinds the pipe fitting port, effectively ensuring the grinding quality of the grinding table 16.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art to which the present invention pertains.

Claims

1. A port grinding device for ship pipe fitting processing, characterized in that, Including: Frame (1); A clamping mechanism, arranged on the frame (1) for horizontally clamping the pipe fitting; A grinding mechanism, including a mounting base (25), a fixed disk (8) arranged on the mounting base (25), a first motor (24), a rotating cylinder (12) connected to the output end of the first motor (24), and two groups of grinding assemblies symmetrically distributed with respect to the rotating cylinder (12). The fixed disk (8) has a guiding groove (801) distributed in an annular wavy shape. The grinding assembly includes a sliding column (13) slidably arranged on the rotating cylinder (12) and having a plurality of clamping grooves (131) arranged side by side in the length direction, a moving rod (9) arranged on the sliding column (13), a clamping platform (14) slidably clamped in the clamping groove (131), a threaded knob (15) threadedly connected to the clamping platform (14) and abutted against the sliding column (13), and a grinding table (16) arranged at the front end of the clamping platform (14). The end of the moving rod (9) is slidably arranged in the guiding groove (801).

2. The port grinding device for ship pipe fitting processing according to claim 1, wherein, The clamping mechanism includes a supporting table (2) horizontally arranged on the frame (1), a bracket (3) arranged on one side of the frame (1), a sliding rod (7) vertically slidably arranged on the bracket (3), a screw rod (5) parallel to the sliding rod (7) and threadedly connected to the bracket (3), a crank (6) connected to the top end of the screw rod (5), and a pressing table (4) arranged at the bottom end of the sliding rod (7). The pressing table (4) is rotatably connected to the bottom end of the screw rod (5).

3. The port grinding device for ship pipe fitting processing according to claim 2, characterized in that, The top of the supporting table (2) has a first arc-shaped groove, and the bottom of the pressing table (4) has a second arc-shaped groove facing the first arc-shaped groove.

4. The port grinding device for ship pipe fitting processing according to claim 3, characterized in that, An elevating mechanism for adjusting the height of the grinding mechanism is arranged on the frame (1). The elevating mechanism includes a mounting cover (26) arranged on the frame (1), a lead screw (28) vertically distributed and rotatably arranged on the mounting cover (26), a slide rail (30) vertically arranged in the mounting cover (26), a lifting platform (29) threadedly connected to the lead screw (28) and slidably arranged on the slide rail (30), and a second motor (27) arranged on the mounting cover (26) and drivingly connected to the lead screw (28). The mounting base (25) is arranged on the lifting platform (29), and the mounting cover (26) has a lifting channel for the lifting platform (29) to pass through.

5. A port grinding device for ship pipe fitting processing according to claim 3 or 4, characterized in that, The radial distance from the inner end of the grinding table (16) to the central axis of the fixed disk (8) is less than the radial distance from the inner wall of the pipe fitting to the central axis of the fixed disk (8), and the radial distance from the outer end of the grinding table (16) to the central axis of the fixed disk (8) is greater than the radial distance from the outer wall of the pipe fitting to the central axis of the fixed disk (8).

6. The port grinding device for ship pipe fitting processing according to claim 1, characterized in that, The side of the rotary drum (12) is provided with an air inlet (121), and the front is provided with an air outlet (122). An air inlet pipe is connected to the air inlet (121), and a check valve one (18) for one-way air intake into the rotary drum (12) is arranged on the air inlet pipe. The air outlet (122) is connected to a three-way pipe (17), and the other two ends of the three-way pipe (17) are both connected to an air outlet assembly. The air outlet assembly includes an air delivery pipe (19) connected to the three-way pipe (17) and an air outlet pipe (23) slidably and sealingly connected to the air delivery pipe (19). A check valve two (20) for one-way air ventilation into the air outlet pipe (23) is arranged on the air delivery pipe (19). The air outlet end of the air outlet pipe (23) faces the outer side of the grinding table (16), and the air outlet pipe (23) is arranged through the clamping table (14).

7. The port grinding device for ship pipe fitting processing according to claim 6, characterized in that, The air outlet pipe (23) is an "L"-shaped tubular structure, and the end is in the form of a Venturi tube structure.

8. A port grinding device for ship pipe fitting processing according to claim 6, characterized in that, The outer end of the air delivery pipe (19) has a flared portion, and a sealing ring (21) is clamped inside the flared portion. The air outlet pipe (23) passes through the sealing ring (21) and is slidably and sealingly connected to the sealing ring (21). The outer peripheral surface of the flared portion has an external thread, and a limit cover (22) is threadedly connected to the flared portion through the external thread. The limit cover (22) is pressed against the outer end of the sealing ring (21), and the limit cover (22) has a through hole for the air outlet pipe (23) to pass through.

9. A port grinding device for ship pipe fitting processing according to claim 1, characterized in that, A shielding cover (11) is arranged on the rotary drum (12). One axial end of the shielding cover (11) is open, and the other axial end has two symmetrically distributed movable channels (111). The guide groove (801) is located inside the shielding cover (11). A baffle plate (10) is arranged on the moving rod (9), and the baffle plate (10) blocks the outside of the movable channel (111).

10. A port grinding device for ship pipe fitting processing according to claim 1, characterized in that, A blanking box (31) is arranged on the frame (1). The top of the blanking box (31) is open, the middle of the top is concave, and one side of the lower part has an opening. A collecting box (32) is slidably arranged at the opening. The collecting box (32) is located below the grinding table (16), and a handle (33) is arranged on the collecting box (32).

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