CN114406837A

CN114406837A - Steel pipe port grinding device

Info

Publication number: CN114406837A
Application number: CN202210078894.0A
Authority: CN
Inventors: 许轶蓉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-04-29

Abstract

A steel pipe port polishing device comprises a main box body, wherein a supporting assembly used for supporting the inner wall of a steel pipe is arranged on the outer side of the main box body, and a polishing assembly used for polishing a steel pipe port is arranged on the right side of the main box body; according to the invention, the two thread blocks on the upper side and the lower side are close to each other, so that the supporting blocks on the upper side and the lower side move towards the direction far away from one side of the main box body until the inner wall of the steel pipe is tightly supported, the gear is rotated, the distance between the grinding tools on the upper side and the lower side is adjusted to be corresponding to the diameter of the steel pipe, the grinding tools on the upper side and the lower side are driven to rotate by the rotation center block, thus the end surface of the steel pipe is ground, the distance between the grinding tools on the upper side and the lower side is adjustable, the invention is suitable for grinding the end ports of large steel pipes with different diameters, and the rotatable grinding tools can grind the edge of the steel pipe, and the grinding angle can be adjusted.

Description

Steel pipe port grinding device

Technical Field

The invention relates to the technical field of steel pipe polishing, in particular to a steel pipe port polishing device.

Background

In the steel pipe production process, flaws such as burrs can appear at the steel pipe port, the burrs need to be polished and removed, the traditional steel pipe port is polished mainly by manually polishing the port through a polishing machine, the polishing efficiency is low, the polishing effect is not ideal, a device for polishing the steel pipe port in the prior art is generally suitable for processing a steel pipe with a small diameter, when a steel pipe with a large diameter is processed, end face unevenness is easily generated, the polishing effect of the edge of the steel pipe is poor, and the polishing angle of the edge cannot be adjusted.

Disclosure of Invention

The invention aims to provide a steel pipe port polishing device which is used for overcoming the defects in the prior art.

The steel pipe port polishing device comprises a main box body, wherein a supporting assembly used for supporting the inner wall of a steel pipe is arranged on the outer side of the main box body, and a polishing assembly used for polishing a steel pipe port is arranged on the right side of the main box body;

the supporting component comprises two supporting blocks which are arranged in an up-down symmetrical mode, friction blocks are fixed on the outer side end faces of the two supporting blocks, two connecting rods which are symmetrical left and right are hinged to the end face, close to one side of the main box body, of the two supporting blocks, and threaded blocks are hinged to one ends, close to the main box body, of the four connecting rods;

the grinding assembly comprises a center block, two bilaterally symmetrical racks are arranged in the center block, grinding tool seats are fixed at the tail ends of one sides, far away from the center block, of the two racks, grinding tools are matched in the two grinding tool seats in a rotating mode, and worm gears meshed with the grinding tools are arranged on the right sides of the two grinding tools.

In a further technical scheme, two thread block cavities with outward openings are arranged in the main box body, the two thread block cavities are symmetrically arranged up and down, the two thread blocks on the upper side and the lower side are respectively in sliding fit with the thread block cavities on the corresponding sides, an end face tooth cavity is arranged between the thread block cavities on the upper side and the lower side, a belt cavity is arranged on the left side of the end face tooth cavity, two vertically symmetrical screw rods are rotationally matched with the right end wall of the belt cavity, the left parts of the two screw rods extend into the belt cavity leftwards, the right side parts of the screw rods extend rightwards into the thread block cavities on the corresponding sides, the thread block cavity screw rods on the upper side and the lower side are respectively in threaded fit with the two thread blocks on the corresponding sides, the thread blocks on the left side and the right side can be close to each other by utilizing the rotation of the screw rods on the upper side and the lower side, and therefore the support blocks on the upper side and the lower side move outwards to tightly support the inner wall of the steel pipe.

Further technical scheme, terminal surface tooth chamber left end wall normal running fit has driven terminal surface tooth axle, driven terminal surface tooth axle left part extends to left the belt intracavity, its right side part extends to right the terminal surface tooth intracavity, terminal surface tooth chamber and upper and lower both sides power connection has the belt between the lead screw, the belt is located the belt intracavity, driven terminal surface tooth axle right side end is fixed with driven terminal surface tooth.

In a further technical scheme, a motor fixedly arranged with the main box body is arranged on the right side of the end face tooth cavity, the left end of the motor is in power connection with a left motor shaft, the left part of the left motor shaft extends leftwards into the end surface tooth cavity, a left shaft sleeve is matched with the outer periphery of the left motor shaft through a spline, the left shaft sleeve is positioned in the end surface tooth cavity, the tail end of the left side of the left shaft sleeve is fixed with driving end face teeth which can be meshed with the driven end face teeth, the right end of the left shaft sleeve is rotationally matched with a left magnetic shaft sleeve seat, a left electromagnet is fixed in the right end wall of the end face tooth cavity, the left electromagnet is annularly arranged by taking the left motor shaft as a center, an end face tooth spring is fixed between the left electromagnet and the left magnetic shaft sleeve seat, whether the driving end face teeth are meshed with the driven end face teeth or not can be controlled through the left-right movement of the driving end face teeth.

A right shaft sleeve seat cavity is formed in the right side of the motor, a right motor shaft is connected to the right end of the motor in a power mode, the right part of the right motor shaft extends rightwards into the right shaft sleeve seat cavity, a right magnetic shaft sleeve seat is in sliding fit in the right shaft sleeve seat cavity, a rotating rod is in rotating fit in the right magnetic shaft sleeve seat, a spline shaft sleeve is in rotating fit in the right end wall of the right shaft sleeve seat cavity, the right part of the rotating rod extends rightwards to penetrate through the rotating rod to the outside of the main box body, the rotating rod is in spline fit with the spline shaft sleeve, a spline cavity with a left opening is formed in the rotating rod, the right part of the right motor shaft can be inserted into the spline cavity, the right motor shaft and the spline cavity can be in spline fit, a right electromagnet is fixed on the left end wall of the right shaft sleeve seat cavity, and a right shaft sleeve spring is fixed between the right electromagnet and the right magnetic shaft sleeve seat, and the left and right movement of the rotating rod is controlled by the power loss of the right electromagnet.

Further technical scheme, the center block is fixed in on the right side motor shaft right-hand member face, be equipped with two bilateral symmetry's rack chamber in the center block, two the rack chamber all runs through from top to bottom the center block, two the rack respectively with correspond the side rack chamber sliding fit, two the intercommunication is equipped with the gear chamber between the rack chamber, gear chamber rear side is equipped with the regulating block chamber, regulating block chamber rear end opening sets up, regulating block chamber front end wall normal running fit has the gear shaft, gear shaft front portion extends forward to the gear chamber, its rear portion part extends to backward the regulating block intracavity, gear shaft front end be fixed with the left and right sides the gear of rack toothing, through the rotation of gear to realize the adjustment about both sides the interval between the grinding apparatus.

In the further technical proposal, the regulating block is in spline fit in the regulating block cavity, a gear shaft cavity with a forward opening is arranged in the regulating block, the rear side part of the gear shaft extends backwards into the gear shaft cavity, the gear shaft and the gear shaft cavity are in spline fit, an adjusting spring is fixed between the rear end wall of the gear shaft cavity and the rear end face of the gear shaft, worm gear cavities are arranged on the right sides of the two grinding tools, worm shafts are rotatably matched on the end walls of the two worm gear cavities on one side far away from the central block, the parts of the two worm shafts on one side close to the central block extend inwards into the worm gear cavities on the corresponding side, one side part of the worm wheel, which is far away from the central block, extends outwards to the outside of the rack on the corresponding side, the two worm wheels are respectively fixed on the tail ends of the inner sides of the worm shafts on the corresponding sides, and the rotation of the worm shafts is utilized to adjust the included angle between the grinding tool and the end surface of the pipeline.

The invention has the beneficial effects that: according to the invention, the two thread blocks on the upper side and the lower side are close to each other, so that the supporting blocks on the upper side and the lower side move towards the direction far away from one side of the main box body until the inner wall of the steel pipe is tightly supported, the gear is rotated, the distance between the grinding tools on the upper side and the lower side is adjusted to be corresponding to the diameter of the steel pipe, the grinding tools on the upper side and the lower side are driven to rotate by the rotation center block, thus the end surface of the steel pipe is ground, the distance between the grinding tools on the upper side and the lower side is adjustable, the invention is suitable for grinding the end ports of large steel pipes with different diameters, and the rotatable grinding tools can grind the edge of the steel pipe, and the grinding angle can be adjusted.

Drawings

FIG. 1 is a schematic external view of the present invention;

FIG. 2 is a schematic view of the overall structure of a steel pipe port polishing device according to the present invention;

FIG. 3 is a schematic view of A-A of FIG. 2 in accordance with the present invention;

FIG. 4 is an enlarged, fragmentary view of the active face tooth member of FIG. 2 in accordance with the present invention;

FIG. 5 is an enlarged, fragmentary, schematic view of the right magnetic sleeve mount component of FIG. 2 in accordance with the present invention;

FIG. 6 is an enlarged, fragmentary view of the abrasive tool carrier component of FIG. 2 in accordance with the present invention;

FIG. 7 is a schematic view of B-B of FIG. 6 according to the present invention.

In the figure:

10. a main box body; 11. a right magnetic shaft sleeve seat; 12. a rack cavity; 13. a center block; 14. a rack; 15. a grinding tool base; 16. a gear; 17. a threaded block cavity; 18. a thread block; 19. a support block; 20. a friction block; 21. a connecting rod; 22. a motor; 23. a screw rod; 24. a driving end face tooth; 25. an adjusting block; 26. adjusting the spring; 27. a gear shaft cavity; 28. a conditioning block cavity; 29. a gear cavity; 30. a gear shaft; 31. a driven end face tooth; 32. a left magnetic shaft sleeve seat; 33. a left electromagnet; 34. a left motor shaft; 35. an end face tooth cavity; 36. a left shaft sleeve; 37. a driven end face gear shaft; 38. a belt chamber; 39. a belt; 40. a right electromagnet; 41. a right sleeve seat cavity; 42. rotating the rod; 43. a face tooth spring; 44. a spline shaft sleeve; 45. a right motor shaft; 46. a right bushing spring; 47. an abrasive article; 48. a worm shaft; 49. a worm gear; 50. a worm gear cavity; 51. a spline cavity.

Detailed Description

In order to make the objects and advantages of the present invention more apparent, the present invention will be described in detail with reference to the following embodiments, which describe the specific features of the steel pipe end grinding device in detail:

referring to fig. 1 to 7, the steel pipe port polishing device according to the embodiment of the invention comprises a main box body 10, wherein a support assembly for supporting the inner wall of a steel pipe is arranged on the outer side of the main box body 10, and a polishing assembly for polishing a steel pipe port is arranged on the right side of the main box body 10;

the supporting component comprises two supporting blocks 19 which are arranged in an up-down symmetrical mode, friction blocks 20 are fixed on the end faces of the outer sides of the two supporting blocks 19, two connecting rods 21 which are symmetrical left and right are hinged to the end faces of the two supporting blocks 19 close to one side of the main box body 10, and threaded blocks 18 are hinged to one ends of the four connecting rods 21 close to the main box body 10;

the grinding assembly comprises a center block 13, two bilaterally symmetrical racks 14 are arranged in the center block 13, grinding tool seats 15 are fixed at the tail ends of the two racks 14 far away from one side of the center block 13, grinding tools 47 are matched in the two grinding tool seats 15 in a rotating mode, and worm gears 49 meshed with the grinding tools 47 are arranged on the right sides of the two grinding tools 47.

Preferably, two thread block cavities 17 with outward openings are arranged in the main box body 10, the two thread block cavities 17 are arranged symmetrically up and down, the two thread blocks 18 on the upper and lower sides are respectively in sliding fit with the thread block cavities 17 on the corresponding sides, an end face tooth cavity 35 is arranged between the thread block cavities 17 on the upper and lower sides, a belt cavity 38 is arranged at the left side of the end face tooth cavity 35, two vertically symmetrical screw rods 23 are rotationally matched with the right end wall of the belt cavity 38, the left parts of the two screw rods 23 extend into the belt cavity 38 leftwards, the right side parts of the screw rods extend rightwards into the thread block cavities 17 on the corresponding sides, the screw rods 23 of the thread block cavities 17 on the upper side and the lower side are respectively in threaded fit with the two thread blocks 18 on the corresponding sides, the thread blocks 18 on the left side and the right side can be close to each other by utilizing the rotation of the screw rods 23 on the upper side and the lower side, and therefore the support blocks 19 on the upper side and the lower side move outwards to tightly support the inner wall of the steel pipe.

Preferably, end face tooth chamber 35 left end wall normal running fit has driven end face tooth axle 37, driven end face tooth axle 37 left side part extends to left in the belt chamber 38, its right side part extends to right in the end face tooth chamber 35, end face tooth chamber 35 and upper and lower both sides power connection has belt 39 between the lead screw 23, belt 39 is located in the belt chamber 38, driven end face tooth axle 37 right side end is fixed with driven end face tooth 31.

Preferably, the right side of the end face tooth cavity 35 is provided with a motor 22 fixedly arranged with the main box body 10, the left end of the motor 22 is in power connection with a left motor shaft 34, the left side part of the left motor shaft 34 extends leftwards into the end face tooth cavity 35, the periphery of the left motor shaft 34 is in spline fit with a left shaft sleeve 36, the left shaft sleeve 36 is positioned in the end face tooth cavity 35, the left end of the left side of the left shaft sleeve 36 is fixedly provided with a driving end face tooth 24 capable of being meshed with the driven end face tooth 31, the right end of the left shaft sleeve 36 is in rotary fit with a left magnetic shaft sleeve seat 32, the right end wall of the end face tooth cavity 35 is internally fixed with a left electromagnet 33, the left electromagnet 33 is annularly arranged by taking the left motor shaft 34 as a center, an end face tooth spring 43 is fixed between the left electromagnet 33 and the left magnetic shaft sleeve seat 32, and by utilizing the power loss of the left electromagnet 33 and the elasticity of the end face tooth spring 43, the driving end face teeth 24 can be controlled to move left and right, and whether the driving end face teeth 24 are meshed with the driven end face teeth 31 or not can be controlled through the left and right movement of the driving end face teeth 24.

Preferably, motor 22 right side is equipped with right axle sleeve seat chamber 41, motor 22 right-hand member power connection has right motor shaft 45, right side motor shaft 45 right side part extends to right axle sleeve seat chamber 41 to the right side, right side axle sleeve seat chamber 41 sliding fit has right magnetism axle sleeve seat 11, right side magnetism axle sleeve seat 11 internal rotation fit has dwang 42, right side axle sleeve seat chamber 41 right-hand member wall internal rotation fit has spline shaft sleeve 44, dwang 42 right side part extends to the right side and runs through dwang 42 to outside the main tank body 10, dwang 42 with spline fit between the spline shaft sleeve 44, spline shaft sleeve 44 is used for supporting dwang 42, be equipped with the left spline chamber 51 of opening in the dwang 42, right side motor shaft 45 right side part can insert in the spline chamber 51, can spline fit between right motor shaft 45 and the spline chamber 51, be fixed with right electro-magnet 40 on the wall of right side axle sleeve seat 41 left end, right electro-magnet 40 with be fixed with right axle sleeve spring 46 between the right side magnetism axle sleeve seat 11, utilize right electro-magnet 40 gains or loses the electricity, thereby control the side-to-side motion of dwang 42.

Preferably, the center block 13 is fixed on the right end surface of the right motor shaft 45, two rack cavities 12 which are symmetrical left and right are arranged in the center block 13, the two rack cavities 12 vertically penetrate through the center block 13, the two racks 14 are respectively in sliding fit with the rack cavities 12 on the corresponding sides, a gear cavity 29 is communicated between the two rack cavities 12, the rear side of the gear cavity 29 is provided with an adjusting block cavity 28, the rear end of the adjusting block cavity 28 is provided with an opening, a gear shaft 30 is rotatably fitted in a front end wall of the adjustment block cavity 28, a front side portion of the gear shaft 30 extends forward to the gear cavity 29, the rear side part of the gear shaft 30 extends backwards into the adjusting block cavity 28, the gear 16 meshed with the racks 14 on the left side and the right side is fixed at the front end of the gear shaft 30, the adjustment of the distance between the grinding tools 47 on the upper and lower sides is achieved by the rotation of the gear 16.

Preferably, an adjusting block 25 is spline-fitted in the adjusting block cavity 28, a gear shaft cavity 27 with a forward opening is arranged in the adjusting block 25, a rear side portion of the gear shaft 30 extends backwards into the gear shaft cavity 27, the gear shaft 30 and the gear shaft cavity 27 are spline-fitted, an adjusting spring 26 is fixed between a rear end wall of the gear shaft cavity 27 and a rear end face of the gear shaft 30, worm gear cavities 50 are respectively arranged at right sides of the two grinding tools 47, worm shafts 48 are rotatably fitted in end walls of one sides of the two worm gear cavities 50 far away from the central block 13, a portion of one side of the two worm shafts 48 near the central block 13 extends inwards into the worm gear cavity 50 at a corresponding side, a portion of one side of the two worm shafts far away from the central block 13 extends outwards to the rack 14 at a corresponding side, and the two worm gears 49 are respectively fixed at inner ends of the worm shafts 48 at the corresponding side, the rotation of the worm shaft 48 is used to adjust the angle between the grinding tool 47 and the end surface of the pipe.

The invention discloses a steel pipe port polishing device, which comprises the following working procedures:

the main box 10 is inserted into the steel pipe and the central block 13 is located outside the steel pipe.

The left electromagnet 33 is activated so that the left electromagnet 33 electrically repels the left magnetic sleeve seat 32, thereby moving the left magnetic sleeve seat 32 leftward against the tension of the end face tooth spring 43, driving the left sleeve 36 leftward, and moving the driving end face tooth 24 leftward into engagement with the driven end face tooth 31.

At this moment, the motor 22 is started, so that the motor 22 drives the left motor shaft 34 to rotate, so that the left shaft sleeve 36 rotates, and then the driving end face tooth 24 is driven to rotate, and then the driven end face tooth 31 rotates, so that the driven end face tooth shaft 37 is driven to rotate, the screw rods 23 on the upper side and the lower side are driven to rotate through the belt 39, so that the thread blocks 18 on the left side and the right side are close to each other, and then the support blocks 19 on the upper side and the lower side move outwards through the connecting rod 21 until the friction blocks 20 on the upper side and the lower side tightly support the inner wall of the steel pipe.

When the friction blocks 20 on the upper and lower sides tightly support the inner wall of the steel pipe, the left electromagnet 33 is closed, so that the driving end face teeth 24 and the driven end face teeth 31 are disengaged.

At this moment, the adjusting block 25 is pulled backwards, so that the adjusting block 25 is far away from the adjusting block cavity 28, the adjusting block 25 is rotated, the gear shaft 30 is rotated, the gear 16 is driven to rotate, the racks 14 on the left side and the right side are far away from or close to each other at the same time until the grinding tools 47 on the upper side and the lower side are opposite to the steel pipe wall, then the adjusting block 25 is loosened, the adjusting block 25 moves forwards under the elastic force action of the adjusting spring 26 to the adjusting block cavity 28, and then the adjusting block 25 cannot rotate freely.

At this time, the right electromagnet 40 is started, so that the right electromagnet 40 electrically attracts the right magnetic sleeve base 11, and the right magnetic sleeve base 11 overcomes the elastic force of the right sleeve spring 46 to move leftward, so as to drive the rotating rod 42 to move leftward, so as to drive the central block 13 to move leftward, and further drive the racks 14 on the upper and lower sides to move leftward, and further enable the grinding tools 47 on the upper and lower sides to move leftward to abut against the steel pipe port.

In this while dwang 42 left motion for right motor shaft 45 right-hand member gets into spline chamber 51, and motor 22 drives right motor shaft 45 and rotates, makes dwang 42 rotate, thereby drives the rotation of centre block 13, and then makes the grinding apparatus 47 of upper and lower both sides use centre block 13 to rotate as the center, thereby realizes polishing of steel pipe terminal surface.

After the end face of the steel pipe is polished, the right electromagnet 40 is closed, so that the rotating rod 42 moves rightwards to be far away from the right motor shaft 45, the rotating rod 42 stops rotating, and meanwhile, the grinding tools 47 on the upper side and the lower side also move rightwards to be far away from the end face of the steel pipe.

At this time, the worm shaft 48 is rotated, so that the worm wheel 49 is rotated, the grinding tool 47 is rotated, the included angle between the grinding tool 47 and the horizontal plane is adjusted, and after the grinding tool 47 is adjusted to a required angle according to grinding requirements, the worm shaft 48 is rotated and stopped.

And restarting the right electromagnet 40, so that the grinding tools 47 on the upper side and the lower side move leftwards to be abutted against the edge of the steel pipe, and the edge of the steel pipe is ground through the rotating grinding tools 47.

It will be apparent to those skilled in the art that various modifications may be made to the above embodiments without departing from the general spirit and concept of the invention. All falling within the scope of protection of the present invention. The protection scheme of the invention is subject to the appended claims.

Claims

1. The utility model provides a steel pipe port grinding device, includes main tank body (10), its characterized in that: a supporting assembly for supporting the inner wall of the steel pipe is arranged on the outer side of the main box body (10), and a polishing assembly for polishing the port of the steel pipe is arranged on the right side of the main box body (10);

the supporting component comprises two supporting blocks (19) which are arranged in an up-down symmetrical mode, friction blocks (20) are fixed on the end faces of the outer sides of the two supporting blocks (19), two connecting rods (21) which are symmetrical left and right are hinged to the end faces of one side, close to the main box body (10), of the two supporting blocks (19), and threaded blocks (18) are hinged to one ends, close to the main box body (10), of the four connecting rods (21);

the polishing assembly comprises a center block (13), two bilaterally symmetrical racks (14) are arranged in the center block (13), grinding tool seats (15) are fixed at the tail ends of one sides, far away from the center block (13), of the two racks (14), grinding tools (47) are matched in the two grinding tool seats (15) in a rotating mode, and worm gears (49) meshed with the grinding tools (47) are arranged on the right sides of the two grinding tools (47).

2. The steel pipe port grinding device according to claim 1, characterized in that: be equipped with two outside screw thread piece chambeies (17) of opening in the main tank body (10), two screw thread piece chamber (17) symmetry sets up from top to bottom, two of upper and lower both sides screw thread piece (18) respectively with correspond the side screw thread piece chamber (17) sliding fit, upper and lower both sides be equipped with terminal surface tooth chamber (35) between screw thread piece chamber (17), terminal surface tooth chamber (35) left side is equipped with belt chamber (38), belt chamber (38) right-hand member wall normal running fit has two longitudinal symmetry's lead screw (23), two lead screw (23) left side part extends to left in belt chamber (38), its right side part all extends to corresponding side right in screw thread piece chamber (17), upper and lower both sides screw thread piece chamber (17) lead screw (23) are respectively corresponding two of side screw thread piece (18) screw-thread fit.

3. The steel pipe port grinding device according to claim 2, characterized in that: end face tooth chamber (35) left end wall normal running fit has driven end face tooth axle (37), driven end face tooth axle (37) left side part extends to left in belt chamber (38), its right side part extends to right in end face tooth chamber (35), end face tooth chamber (35) and upper and lower both sides power connection has belt (39) between lead screw (23), belt (39) are located in belt chamber (38), driven end face tooth axle (37) right side end is fixed with driven end face tooth (31).

4. The steel pipe port grinding device according to claim 3, wherein: a motor (22) fixedly arranged with the main box body (10) is arranged at the right side of the end face tooth cavity (35), the left end of the motor (22) is in power connection with a left motor shaft (34), the left part of the left motor shaft (34) extends leftwards to the inside of the end face tooth cavity (35), a left shaft sleeve (36) is in spline fit on the outer periphery of the left motor shaft (34), the left shaft sleeve (36) is positioned in the end face tooth cavity (35), the left end of the left shaft sleeve (36) is fixed with driving end face teeth (24) which can be meshed with the driven end face teeth (31), the right end of the left shaft sleeve (36) is rotationally matched with a left magnetic shaft sleeve seat (32), a left electromagnet (33) is fixed in the right end wall of the end face tooth cavity (35), the left electromagnet (33) is annularly arranged by taking the left motor shaft (34) as the center, and a face tooth spring (43) is fixed between the left electromagnet (33) and the left magnetic shaft sleeve seat (32).

5. The steel pipe port grinding device according to claim 4, wherein: the utility model discloses a motor, including motor (22), right-hand member power connection have right motor shaft (45), right motor shaft (45) right side part extends to right side in shaft sleeve seat chamber (41), sliding fit has right magnetism shaft sleeve seat (11) in right side shaft sleeve seat chamber (41), right side magnetism shaft sleeve seat (11) rotating fit has dwang (42), right side shaft sleeve seat chamber (41) right-hand member wall rotating fit has spline shaft sleeve (44), dwang (42) right side part extends to run through right outside dwang (42) extremely main tank body (10), dwang (42) with spline fit between spline shaft sleeve (44), be equipped with opening left spline chamber (51) in dwang (42), right side motor shaft (45) right side part can insert in spline chamber (51), the right motor shaft (45) and the spline cavity (51) can be in spline fit, a right electromagnet (40) is fixed on the left end wall of the right shaft sleeve seat cavity (41), and a right shaft sleeve spring (46) is fixed between the right electromagnet (40) and the right magnetic shaft sleeve seat (11).

6. The steel pipe port grinding device according to claim 5, wherein: the center block (13) is fixed on the right end face of the right motor shaft (45), two rack cavities (12) which are symmetrical left and right are arranged in the center block (13), the two rack cavities (12) vertically penetrate through the center block (13), the two racks (14) are respectively in sliding fit with the rack cavities (12) on the corresponding sides, a gear cavity (29) is communicated between the two rack cavities (12), an adjusting block cavity (28) is arranged at the rear side of the gear cavity (29), the rear end of the adjusting block cavity (28) is provided with an opening, a gear shaft (30) is rotationally matched in the front end wall of the adjusting block cavity (28), the front side part of the gear shaft (30) extends forwards to the gear cavity (29), the rear side part of the gear shaft (30) extends backwards into the adjusting block cavity (28), and the tail end of the front side of the gear shaft is fixed with a gear (16) meshed with the racks (14) on the left side and the right side.

7. The steel pipe port grinding device according to claim 6, wherein: an adjusting block (25) is in spline fit in the adjusting block cavity (28), a gear shaft cavity (27) with a forward opening is arranged in the adjusting block (25), the rear side part of the gear shaft (30) extends backwards into the gear shaft cavity (27), the gear shaft (30) and the gear shaft cavity (27) are in spline fit, an adjusting spring (26) is fixed between the rear end wall of the gear shaft cavity (27) and the rear end face of the gear shaft (30), worm cavities (50) are arranged on the right sides of the two grinding tools (47), worm shafts (48) are in spline fit in the end wall of one side of the two worm cavities (50) far away from the central block (13), one side parts of the two worm shafts (48) close to the central block (13) extend inwards into the worm cavities (50) on the corresponding side, and one side parts of the two worm shafts far away from the central block (13) extend outwards to the outside of the racks (14) on the corresponding side, the two worm wheels (49) are fixed to the inner ends of the worm shafts (48) on the corresponding sides, respectively.