Device for polishing outer wall of steel pipe based on circumferential direction

Abstract

The utility model discloses a device for polishing the outer wall of a steel pipe in the circumferential direction, and belongs to the technical field of machining of steel pipes. The device for polishing the outer wall of the steel pipe based on the circumferential direction comprises two first supports, four second supports, two third supports, two fourth supports, a fifth support, two rotating shafts, two grinding wheels, two linear bearings, a cushion block, four round bars, thirty-two screws, eight rolling bearings, four wheels and eight hinges. The device can achieve the purpose of quickly polishing local or all scales of the steel pipe, and has the advantages of being low in manufacturing cost, easy to operate and good in using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing of steel pipes, and in particular relates to a device for grinding the outer wall of a steel pipe based on a circumferential direction. Background Art

[0002] At present, steel pipes are usually made by hot rolling piercing + continuous pipe rolling + tension reducing. Since the pipe making process is carried out in a high temperature and humid environment, a certain degree of iron oxide scale will inevitably be produced on the inner and outer walls of the steel pipe after forming. In order to extend the service life of the steel pipe, the inner and outer walls of the steel pipe are usually painted with anti-corrosion paint, which requires the inner and outer walls of the steel pipe to be polished in advance. The traditional polishing method is that workers use handheld grinders to gradually polish the inner and outer walls of the steel pipe. Although some companies have developed some devices for polishing the inner and outer walls of steel pipes, some of these devices have relatively high manufacturing costs and some have relatively complicated operating processes.

[0003] After searching, it was found that three literature patents are most relevant to the utility model technology, and the specific contents are described as follows:

[0004] Patent document CN 207415069 U discloses a steel pipe outer wall grinding device and a grinding system, which mainly include a support frame, a base plate, a triangular bracket, a roller shaft, a motor, a wire brush, a roller shaft, a cylinder, a trolley, a grinding device, a dust collection device, a roller, a telescopic pipe, a negative pressure system, a dust collection box and a dust collection host. Since the rust and dirt polished off are adsorbed and collected by the dust collection fan through the negative pressure system, the device avoids environmental pollution, but the manufacturing cost of the device is relatively high.

[0005] Patent document CN 207807380 U discloses a steel pipe outer wall grinding and spraying device, which mainly includes a roller, a connecting rod, a rigid connecting piece, a buckle, a positioning piece, a brush barrel, a drive motor, a bracket, a high-pressure nozzle, a storage tank, a feeding port, a rocker arm and a handle. Since the spraying operation can be performed while grinding the outer wall of the steel pipe, the structure of the device is relatively compact and relatively convenient to use, but the manufacturing cost of the device is relatively high.

[0006] Patent document CN 211565329 U discloses an outer wall grinding device for steel pipe rod processing, which mainly includes a base, a movable frame, a motor, a bearing, a lead screw, a movable block, a track, a sliding table, a gantry, an axis fixing block, a gear, a chain, a lifting block, a lifting frame, a fixing frame, a supporting frame, a grinding wheel, a supporting seat, a connecting block, a rotating frame, a rotating fixture and a motor frame. Due to the addition of an outer wall grinding structure and a workpiece rotating structure, the working efficiency of the device is relatively high, but the manufacturing cost of the device is relatively high. Utility Model Content

[0007] In order to overcome one or more problems existing in the prior art, the utility model provides a device for grinding the outer wall of a steel pipe in a circumferential direction. The utility model is designed based on a symmetrical structure. The combined use of wheels and hinges can realize the horizontal movement of the first bracket vehicle; the combined use of the fifth bracket and the screw can realize the relative setting of the first bracket, and the use of the first bracket can realize the positioning setting of the round rod; the use of the pad can realize the relative setting of the fourth bracket, and the use of the screw can realize the linkage between the fourth bracket and the linear bearing; the use of the round rod can realize the forward and backward movement of the linear bearing according to a predetermined trajectory, and the combined use of the fourth bracket and the rolling bearing can realize the swing of the third bracket; the combined use of the third bracket and the screw can realize the relative setting of the second bracket, and the combined use of the second bracket and the rolling bearing can realize the rotation of the rotating shaft; the combined use of the rotating shaft and the hinge can realize the positioning rotation of the grinding wheel, and the combined use of the two grinding wheels can achieve the purpose of quickly grinding the outer wall of the steel pipe. Therefore, the use effect of the device of the utility model is relatively good.

[0008] The technical solution adopted by the utility model to solve its technical problem is as follows.

[0009] The device for grinding the outer wall of a steel pipe based on the circumferential direction provided by the utility model comprises: two first brackets, four second brackets, two third brackets, two fourth brackets, a fifth bracket, two rotating shafts, two grinding wheels, two linear bearings, a cushion block, four round rods, thirty-two screws, eight rolling bearings, four wheels and eight hinges;

[0010] The first bracket is composed of a first body, a first boss and a second boss connected together, the first body, the first boss and the second boss are all rectangular parallelepiped symmetrical structures, the first boss is located on the upper end surface of the first body, and the second boss is located on the rear end surface of the first boss; the lower end surface of the first body is provided with a rectangular parallelepiped through groove, and the wheel is penetrated in the through groove; the front and rear sides of the through groove are respectively provided with two cylindrical first through holes, and the hinge is penetrated in the first through hole; the first boss is symmetrically provided with four cylindrical second through holes, and the screw is penetrated in the second through hole; the rear end surface of the second boss is symmetrically provided with four cylindrical first grooves, and the round rod is penetrated in the first groove;

[0011] The second bracket is composed of a second body and a third boss connected together, the second body and the third boss are both rectangular parallelepiped symmetrical structures, the third boss is located on the upper end surface of the second body; a cylindrical second groove is provided on the rear end surface of the second body, the rolling bearing is penetrated in the second groove; a cylindrical fourth through hole is provided at the axial position of the second groove, the first bearing section of the rotating shaft is penetrated in the fourth through hole; four cylindrical fifth through holes are symmetrically provided on the third boss, the screw is penetrated in the fifth through hole;

[0012] The third bracket is composed of a third body, two fourth bosses and two second bearing segments, the third body and the fourth bosses are both rectangular parallelepiped symmetrical structures, the two fourth bosses are simultaneously located on the lower end surface of the third body, and the two second bearing segments are respectively located on the front and rear end surfaces of the third body; the fourth bosses are symmetrically provided with four first screw holes, and the screws are screwed into the first screw holes; the second bearing segment is a cylindrical symmetrical structure, which is used to penetrate the rolling bearing;

[0013] The fourth bracket is composed of a fifth body and two sixth bosses connected together, the fifth body and the sixth boss are both rectangular parallelepiped symmetrical structures, and the two sixth bosses are respectively located on the left and right end faces of the fifth body; a ninth rectangular through hole is provided in the middle part of the fifth body, and the four fifth bosses of the linear bearing are penetrated in the ninth through hole; four tenth cylindrical through holes are evenly provided around the ninth through hole, and the screws are penetrated in the tenth through hole; a third cylindrical groove is provided on the rear end face of the sixth boss, and the rolling bearing is penetrated in the third groove; an eleventh cylindrical through hole is provided at the axial position of the third groove, and the second bearing section of the third bracket is penetrated in the eleventh through hole;

[0014] The fifth bracket is composed of two sixth bodies and a seventh boss connected together, the sixth body and the seventh boss are both rectangular parallelepiped symmetrical structures, and the seventh boss is located between the two sixth bodies; the sixth body is symmetrically provided with four third screw holes, and the screws are screwed into the third screw holes;

[0015] The grinding wheel is a cylindrical symmetrical structure, and a sixth through hole in the shape of a regular octagon is opened at the axis position of the grinding wheel, and the locking section of the rotating shaft is penetrated in the sixth through hole.

[0016] In some embodiments, the rotating shaft is composed of a coaxial locking section and two first bearing sections, and the two first bearing sections are respectively located on the front and rear end faces of the locking section; the locking section is a symmetrical structure in the shape of a regular octahedron, used to penetrate the sixth through hole of the grinding wheel; the locking section is symmetrically provided with two cylindrical third through holes, and the hinge is penetrated in the third through hole; the first bearing section is a symmetrical structure in the shape of a cylinder, used to penetrate the rolling bearing.

[0017] In some embodiments, the linear bearing is composed of a fourth body and four fifth bosses connected to each other, and the four fifth bosses are simultaneously located on the rear end face of the fourth body; the fourth body is a rectangular symmetrical structure, and the fourth body is symmetrically provided with four cylindrical seventh through holes, and the screws are passed through the seventh through holes; the fifth boss is a cylindrical symmetrical structure, and a cylindrical eighth through hole is provided at the axial position of the fifth boss, and the round rod is passed through the eighth through hole, and the eighth through hole also runs through the fourth body; a retaining frame, a ball and a retaining ring are also provided inside the fifth boss.

[0018] In some embodiments, the cushion block is a symmetrical rectangular structure, a rectangular twelfth through hole is provided in the middle portion of the cushion block, and four fifth bosses of the linear bearing are passed through the twelfth through hole; four second screw holes are evenly provided around the twelfth through hole, and the screws are screwed into the second screw holes.

[0019] In some embodiments, the round rod is a cylindrical symmetrical structure, the middle portion of the round rod is inserted into the eighth through hole of the linear bearing, and both ends of the round rod are inserted into the first groove of the first bracket.

[0020] In some embodiments, the screw, the rolling bearing, the wheel and the hinge are all standard parts.

[0021] The beneficial effects of the utility model are as follows:

[0022] 1) The device for grinding the outer wall of a steel pipe in a circumferential direction provided by the utility model comprises two first brackets, four second brackets, two third brackets, two fourth brackets, a fifth bracket, two rotating shafts, two grinding wheels, two linear bearings, a cushion block, four round rods, thirty-two screws, eight rolling bearings, four wheels and eight hinges. Since the material is common and convenient for processing and forming, the manufacturing cost of the device of the utility model is relatively low.

[0023] 2) When the utility model uses the local grinding mode, the third bracket on the right is initially in a horizontal setting, and the two linear bearings are moved horizontally along the four round rods to reach the part of the steel pipe that needs to be ground; the first bracket car is moved to the right so that the grinding wheel on the left can maintain a circular circumscribed relationship with the steel pipe, and the third bracket on the right is swung forward so that the third bracket on the right is in a vertical setting, and the grinding wheel on the right can also maintain a circular circumscribed relationship with the steel pipe, and the two rotating shafts are slowly rotated in opposite directions so that the two grinding wheels can grind the local oxidized iron scale of the steel pipe; the third bracket on the right is swung reversely so that the third bracket on the right is in a horizontal setting, and the first bracket car is moved to the left so that the grinding wheel on the left maintains a separated relationship with the steel pipe, and the two linear bearings are moved horizontally along the four round rods to reach the next part of the steel pipe that needs to be ground. Therefore, the operation of the device of the utility model is relatively simple.

[0024] 3) When the utility model uses the overall grinding mode, the third bracket on the right is initially in a horizontal setting, and the linear bearing is moved horizontally along the four round rods to reach the part of the steel pipe that needs to be ground; the first bracket car is moved to the right so that the grinding wheel on the left can maintain a circular tangent relationship with the steel pipe, and the third bracket on the right is swung forward so that the third bracket on the right is in a vertical setting, and the grinding wheel on the right can also maintain a circular tangent relationship with the steel pipe, and the steel pipe is slowly rotated, and the two shafts are slowly rotated in the same direction so that the two grinding wheels can grind the oxidized iron scale of the steel pipe along the circumferential direction; the third bracket on the right is swung reversely so that the third bracket on the right is in a horizontal setting, and the first bracket car is moved to the left so that the grinding wheel on the left maintains a separated relationship with the steel pipe, and the two linear bearings are moved horizontally along the four round rods to reach the next part of the steel pipe that needs to be ground. Therefore, the operation of the device of the utility model is relatively simple.

[0025] 4) The utility model is designed based on a symmetrical structure. The combined use of wheels and hinges can realize the horizontal movement of the first bracket vehicle; the combined use of the fifth bracket and screws can realize the relative setting of the first bracket, and the use of the first bracket can realize the positioning setting of the round rod; the use of pads can realize the relative setting of the fourth bracket, and the use of screws can realize the linkage of the fourth bracket and the linear bearing; the use of round rods can realize the forward and backward movement of the linear bearing according to a predetermined trajectory, and the combined use of the fourth bracket and the rolling bearing can realize the swing of the third bracket; the combined use of the third bracket and screws can realize the relative setting of the second bracket, and the combined use of the second bracket and the rolling bearing can realize the rotation of the rotating shaft; the combined use of the rotating shaft and the hinge can realize the positioning rotation of the grinding wheel, and the combined use of two grinding wheels can achieve the purpose of quickly grinding the outer wall of the steel pipe. Therefore, the use effect of the device of the utility model is relatively good.

[0026] The device for grinding the outer wall of a steel pipe in a circumferential direction provided by the utility model can achieve the purpose of quickly grinding partial or all oxidized iron scale of the steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the main structure of the utility model when the third bracket located on the right side is horizontally arranged;

[0028] Figure 2 This is a schematic diagram of the main structure of the utility model when the third brackets located on both sides are erected;

[0029] Figure 3 It is a left-side structural schematic diagram of the utility model device when the third brackets located on both sides are erected;

[0030] Figure 4 It is a schematic diagram of the top view of the structure when the third brackets located on both sides of the device of the utility model are arranged upright;

[0031] Figure 5 This is a schematic diagram of the main structure of the first bracket and the wheel of the device of the utility model after being assembled;

[0032] Figure 6 It is a left-side structural schematic diagram of the first bracket of the device of the utility model;

[0033] Figure 7 It is a schematic diagram of the top view of the structure of the first bracket and the wheel of the device of the utility model after being assembled;

[0034] Figure 8 It is a schematic diagram of the top view of the rotating shaft of the device of the utility model;

[0035] Fig. 9 It is a schematic diagram of the main structure of the second bracket of the device of the utility model;

[0036] Fig.10 It is a left-side structural schematic diagram of the second bracket of the device of the utility model;

[0037] Fig.11 This is a schematic diagram of the main structure of the grinding wheel of the device of the utility model;

[0038] Fig.12 This is a schematic diagram of the main structure of the third bracket of the device of the utility model;

[0039] Fig.13 It is a left-side structural schematic diagram of the third bracket of the device of the utility model;

[0040] Fig.14 This is a schematic diagram of the main structure of the linear bearing of the device of the utility model;

[0041] Fig.15 It is a bottom view structural diagram of the linear bearing of the device of the utility model;

[0042] Fig.16 This is a schematic diagram of the main structure of the fourth bracket of the device of the utility model;

[0043] Fig.17 It is a schematic diagram of the top view of the structure of the fourth bracket of the device of the utility model;

[0044] Fig.18 This is a schematic diagram of the main structure of the cushion block of the utility model device;

[0045] Fig.19 This is a schematic diagram of the main structure of the fifth bracket of the device of the utility model;

[0046] Fig. 20 It is a top view structural schematic diagram of the fifth bracket of the device of the utility model;

[0047] Fig.21 It is a left-side structural schematic diagram of a round rod of the device of the utility model;

[0048] Fig. 22 This is a schematic diagram of the main structure of the utility model device, in which the third bracket located on the right side is swinging forward;

[0049] Fig.23 This is a schematic diagram of the main structure of the third bracket on the right side of the device of the utility model swinging in the opposite direction;

[0050] Fig.24 This is a schematic diagram of the main structure of the utility model device when the rotating shaft rotates in the positive direction when the steel pipe is stationary;

[0051] Fig.25 This is a schematic diagram of the main structure of the utility model device in which the rotating shaft rotates in the opposite direction when the steel pipe is stationary;

[0052] Fig.26 It is a schematic diagram of the rotation direction of the rotating shaft of the utility model device when the steel pipe rotates in the clockwise direction;

[0053] Fig. 27 It is a schematic diagram of the rotation direction of the rotating shaft of the device of the utility model when the steel pipe rotates in the counterclockwise direction.

[0054] Description of reference numerals: 1-first bracket; 101-first body; 102-first boss; 103-second boss; 104-through groove; 105-first through hole; 106-second through hole; 107-first groove; 2-rotating shaft; 201-positioning section; 202-first bearing section; 203-third through hole; 3-second bracket; 301-second body; 302-third boss; 303-second groove; 304-fourth through hole; 305-fifth through hole; 4-grinding wheel; 401-sixth through hole; 5-third bracket; 501-third body; 502-fourth boss; 503-second bearing section; 504-first screw hole; 6-linear bearing; 601-fourth body; 602-fifth boss; 603-seventh through hole; 604-eighth through hole; 7-fourth bracket; 701-fifth body; 702-sixth boss; 703-ninth through hole; 704-tenth through hole; 705-third groove; 706-eleventh through hole; 8-pad; 801-twelfth through hole; 802-second screw hole; 9-fifth bracket; 901-sixth body; 902-seventh boss; 903-third screw hole; 10-round rod; 11-screw; 12-rolling bearing; 13-wheel; 14-hinge; 15-steel pipe. DETAILED DESCRIPTION

[0055] The content of the utility model is described in detail below through examples and drawings. The examples are only used to understand the utility model, but are not intended to limit the content of the utility model.

[0056] Combination Figures 1 to 4As shown, the utility model provides a device for grinding the outer wall of a steel pipe based on the circumferential direction, which includes two first brackets 1, four second brackets 3, two third brackets 5, two fourth brackets 7, a fifth bracket 9, two rotating shafts 2, two grinding wheels 4, two linear bearings 6, a cushion block 8, four round rods 10, thirty-two screws 11, eight rolling bearings 12, four wheels 13 and eight hinges 14; wherein, two sixth bodies 901 of the fifth bracket 9 are inserted between the two first bosses 102 of the two relatively arranged first brackets 1, and are connected by the eight screws 11; eight end portions of the four round rods 10 are inserted into the eight first grooves 107 of the two first brackets 1, and the middle portions of the four round rods 10 are inserted into the eight eighth through holes 604 of the two relatively arranged linear bearings 6; the eight fifth bosses 602 of the two linear bearings 6 are successively inserted into the two ninth through holes 703 of the two relatively arranged fourth brackets 7 and the The twelfth through hole 801 of the cushion block 8 is penetrated by the eight screws 11; the four third grooves 705 of the two fourth brackets 7 are penetrated by the four rolling bearings 12, and the four second bearing sections 503 of the two third brackets 5 are penetrated by the four rolling bearings 12; the four third bosses 302 of the four second brackets 3 are arranged outside the four fourth bosses 502 of the two third brackets 5, and are connected by sixteen screws 11; the four second grooves 303 of the four second brackets 3 are penetrated by the four rolling bearings 12, and the four first bearing sections 202 of the two rotating shafts 2 are penetrated by the four rolling bearings 12; the two positioning sections 201 of the two rotating shafts 2 are penetrated by the two sixth through holes 401 of the two grinding wheels 4, and are positioned by the four hinges 14; the four wheels 13 are penetrated by the two through grooves 104 of the two first brackets 1, and are hinged by the four hinges 14.

[0057] The assembly process of the device for grinding the outer wall of a steel pipe in the circumferential direction provided by the utility model

[0058] Combination Figures 1 to 21 As shown, firstly, four rolling bearings 12 are installed in the four third grooves 705 of the two fourth brackets 7, and then the two fourth brackets 7 are arranged relative to each other, and then the four second bearing segments 503 of the two third brackets 5 are inserted into the four rolling bearings 12, so that the two fourth brackets 7, the four rolling bearings 12 and the two third brackets 5 can be assembled;

[0059] Then, the cushion block 8 is inserted between the two fifth bodies 701 of the two fourth brackets 7, and then the eight fifth bosses 602 of the two linear bearings 6 are successively inserted into the two ninth through holes 703 of the two fourth brackets 7 and the twelfth through hole 801 of the cushion block 8, and then the eight screws 11 are successively passed through the eight seventh through holes 603 of the two linear bearings 6 and the eight tenth through holes 704 of the two fourth brackets 7, and screwed into the four second screw holes 802 of the cushion block 8, so that the two linear bearings 6, the two fourth brackets 7 and the cushion block 8 can be assembled;

[0060] Then, the four round rods 10 are inserted into the eight eighth through holes 604 of the two linear bearings 6, and then the two first brackets 1 are arranged relatively to each other, and then the eight ends of the four round rods 10 are inserted into the eight first grooves 107 of the two first brackets 1, and then the fifth bracket 9 is inserted between the two first bosses 102 of the two first brackets 1, and the eight third screw holes 903 of the fifth bracket 9 are aligned with the eight second through holes 106 of the two first brackets 1, and then the eight screws 11 are passed through the eight second through holes 106 and screwed into the eight third screw holes 903, so that the two linear bearings 6, the four round rods 10, the two first brackets 1 and the fifth bracket 9 can be assembled;

[0061] Then, four wheels 13 are inserted into the two through slots 104 of the two first brackets 1, and the four axial holes of the four wheels 13 are aligned with the four first through holes 105 of the two first brackets 1, and then four hinges 14 are installed in the four groups of aligned through holes, so that the two first brackets 1 and the four wheels 13 can be assembled into a first bracket vehicle;

[0062] Then, the two clamping sections 201 of the two rotating shafts 2 are respectively inserted into the two sixth through holes 401 of the two grinding wheels 4, and then four hinges 14 are installed in the four third through holes 203 of the two rotating shafts 2. In this way, the two rotating shafts 2 and the two grinding wheels 4 can be assembled;

[0063] Then, four rolling bearings 12 are installed in the four second grooves 303 of the four second brackets 3, and then the four second brackets 3 are arranged opposite to each other in pairs, and then the four first bearing sections 202 of the two rotating shafts 2 are inserted into the four rolling bearings 12, so that the four second brackets 3, the four rolling bearings 12 and the two rotating shafts 2 can be assembled;

[0064] Then, the four third bosses 302 of the four second brackets 3 are sleeved outside the four fourth bosses 502 of the two third brackets 5, and the sixteen fifth through holes 305 of the four second brackets 3 and the sixteen first screw holes 504 of the two third brackets 5 are aligned, and then the sixteen screws 11 are passed through the sixteen fifth through holes 305 and screwed into the sixteen first screw holes 504. In this way, the whole device is assembled and can be put into use.

[0065] The device for grinding the outer wall of a steel pipe in a circumferential direction provided by the utility model is located on the right side of the third bracket. The setting principle of the swing direction

[0066] Combination Figure 1 and Figure 2 As shown, based on the main structural diagram of the device of the utility model, for the convenience of description, the third bracket 5 located on the left is defined as ①, and the third bracket 5 located on the right is defined as ②, wherein the four second bearing sections 503 of the two third brackets 5 are all swing axes; in order to save energy, the ① is not swung as much as possible and is always kept in an upright setting;

[0067] Combination Figure 1 As shown, it is assumed that the third bracket 5 located on the right side is initially in a horizontal arrangement, and after simplification, it is as follows Fig. 22 As shown, the ② swings 90 degrees in the clockwise direction, and the ② is in an upright position. It is not a bad idea to define this swinging direction of the third bracket 5 as a positive direction;

[0068] Combination Figure 2 As shown, it is assumed that the third bracket 5 located on the right side is in an upright position initially, and after simplification, it is shown as Fig.23 As shown, the ② swings 90 degrees in the counterclockwise direction, and the ② is in a horizontal setting. It is conceivable that this swinging direction of the third bracket 5 is defined as the reverse direction.

[0069] The setting principle of the rotation direction of the rotating shaft of the device for grinding the outer wall of the steel pipe in the circumferential direction provided by the utility model

[0070] Combination Figure 2 As shown, based on the main structural diagram of the device of the utility model, for the convenience of description, the rotating shaft 2 located on the left is defined as ③, and the rotating shaft 2 located on the right is defined as ④. At this time, the two grinding wheels 4 are both in a circumscribed relationship with the steel pipe 15, that is, the two grinding wheels 4 can grind the outer wall of the steel pipe 15;

[0071] For the grinding operation for the purpose of removing the local oxidized iron scale on the outer wall of the steel pipe 15, a local grinding mode is set; for the grinding operation for the purpose of removing the entire oxidized iron scale on the outer wall of the steel pipe 15, an overall grinding mode is set, which are described as follows:

[0072] Local grinding mode: grinding the local iron oxide scale on the outer wall of the steel pipe 15

[0073] Combination Fig.24 As shown, assuming that the steel pipe 15 always remains stationary, that is, the steel pipe 15 does not rotate, ③ rotates slowly in the counterclockwise direction, and ④ rotates slowly in the clockwise direction. At this time, the rotation directions of the two grinding wheels 4 are just opposite, which can ensure the force balance of the steel pipe 15 to achieve stable operation of the device. It is better to define this rotation direction of the rotating shaft 2 as the positive direction;

[0074] Combination Fig.25 As shown, assuming that the steel pipe 15 always remains stationary, that is, the steel pipe 15 does not rotate, ③ rotates slowly in the clockwise direction, and ④ rotates slowly in the counterclockwise direction. At this time, the rotation directions of the two grinding wheels 4 are exactly opposite, which can ensure the force balance of the steel pipe 15 to achieve stable operation of the device. It is better to define this rotation direction of the rotating shaft 2 as reverse;

[0075] In summary, when the steel pipe 15 remains stationary, the two rotating shafts 2 should rotate slowly in opposite directions, so as to ensure the force balance of the steel pipe 15 and achieve stable operation of the device.

[0076] Overall grinding mode: grinding all the iron oxide scale on the outer wall of the steel pipe 15

[0077] Combination Fig.26 As shown, assuming that the steel pipe 15 rotates slowly in the clockwise direction, ③ and ④ also rotate slowly in the clockwise direction at the same time, at this time, the two grinding wheels 4 and the tangent parts of the steel pipe 15 can maintain reverse motion, that is, the relative speed between the two grinding wheels 4 and the outer wall of the steel pipe 15 reaches the maximum, thereby achieving the purpose of improving the grinding efficiency;

[0078] Combination Fig. 27 As shown, assuming that the steel pipe 15 rotates slowly in the counterclockwise direction, ③ and ④ also rotate slowly in the counterclockwise direction at the same time, at this time, the two grinding wheels 4 and the tangent parts of the steel pipe 15 can maintain reverse motion, that is, the relative speed between the two grinding wheels 4 and the outer wall of the steel pipe 15 reaches the maximum, thereby achieving the purpose of improving the grinding efficiency;

[0079] In summary, when the steel pipe 15 rotates slowly, the two rotating shafts 2 should rotate slowly in the same direction as the steel pipe 15, so as to ensure that the relative speed between the two grinding wheels 4 and the outer wall of the steel pipe 15 reaches the maximum, so as to improve the grinding efficiency.

[0080] The utility model provides a method for using a device for grinding the outer wall of a steel pipe in a circumferential direction in a local grinding mode.

[0081] Step a1: Combination Figures 1 to 4 As shown, assuming that the third bracket 5 located on the right side is initially in a horizontal position, firstly, the two linear bearings 6 are horizontally moved along the four round rods 10 to reach the part of the steel pipe 15 that needs to be polished;

[0082] Step a2: Combination Figures 1 to 25 As shown, the first bracket vehicle is then moved to the right so that the grinding wheel 4 on the left side can maintain a circumscribed relationship with the steel pipe 15, and then the third bracket 5 on the right side is swung forward so that the third bracket 5 on the right side is in an upright position. At this time, the grinding wheel 4 on the right side can also maintain a circumscribed relationship with the steel pipe 15, and then the two rotating shafts 2 are slowly rotated in opposite directions so that the two grinding wheels 4 can grind the local oxidized iron scale of the steel pipe 15;

[0083] Step a3: Combination Figures 1 to 25 As shown, the third bracket 5 on the right side is then swung in the opposite direction so that the third bracket 5 on the right side is in a horizontal setting, and then the first bracket car is moved to the left so that the grinding wheel 4 and the steel pipe 15 on the left side remain separated, and then the two linear bearings 6 are moved horizontally along the four round rods 10 to reach the next part of the steel pipe 15 that needs to be polished, and then the operation of step a2 is repeated.

[0084] The utility model provides a method for using a device for grinding the outer wall of a steel pipe in a circumferential direction in an overall grinding mode.

[0085] Step b1: Combination Figures 1 to 4 As shown, assuming that the third bracket 5 located on the right side is initially in a horizontal position, firstly, the two linear bearings 6 are horizontally moved along the four round rods 10 to reach the part of the steel pipe 15 that needs to be polished;

[0086] Step b2: Combination Figures 1 to 27As shown, the first bracket vehicle is then moved to the right so that the grinding wheel 4 on the left side can maintain a circumscribed relationship with the steel pipe 15, and then the third bracket 5 on the right side is swung forward so that the third bracket 5 on the right side is in an upright position. At this time, the grinding wheel 4 on the right side can also maintain a circumscribed relationship with the steel pipe 15, and then the steel pipe 15 is slowly rotated, and then the two rotating shafts 2 are slowly rotated in the same direction so that the two grinding wheels 4 can grind the oxidized iron scale of the steel pipe 15 along the circumferential direction;

[0087] Step b3: Combination Figures 1 to 27 As shown, the third bracket 5 on the right side is then swung in the opposite direction so that the third bracket 5 on the right side is in a horizontal setting, and then the first bracket car is moved to the left so that the grinding wheel 4 and the steel pipe 15 on the left side are kept separated, and then the two linear bearings 6 are moved horizontally along the four round rods 10 to reach the next part of the steel pipe 15 that needs to be polished, and then the operation of step b2 is repeated to grind all the oxidized iron scales of the steel pipe 15.

[0088] Supplementary explanation: The device for grinding the outer wall of a steel pipe in a circumferential direction provided by the utility model is designed with a symmetrical structure. First, according to the outer diameter specification of the steel pipe, the fixed length of the steel pipe and the setting height of the steel pipe, multiple specifications of the device of the utility model should be designed and manufactured to match it.

[0089] It can be seen from the embodiments that the device for grinding the outer wall of a steel pipe in a circumferential direction provided by the utility model can achieve the purpose of quickly grinding partial or complete oxidized iron scale of the steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect.

[0090] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein.

Claims

1. A device for grinding the outer wall of a steel pipe in a circumferential direction, characterized in that: The device for grinding the outer wall of a steel pipe based on the circumferential direction comprises: two first brackets (1), four second brackets (3), two third brackets (5), two fourth brackets (7), a fifth bracket (9), two rotating shafts (2), two grinding wheels (4), two linear bearings (6), a cushion block (8), four round rods (10), thirty-two screws (11), eight rolling bearings (12), four wheels (13) and eight hinges (14), wherein: The first bracket (1) is composed of a first body (101), a first boss (102) and a second boss (103) connected together; the first body (101), the first boss (102) and the second boss (103) are all rectangular parallelepiped symmetrical structures; the first boss (102) is located on the upper end surface of the first body (101), and the second boss (103) is located on the rear end surface of the first boss (102); the lower end surface of the first body (101) is provided with a rectangular parallelepiped through groove (104), and the through groove (104) is provided with a plurality of through grooves (105). 4) is provided with the wheel (13); the front and rear sides of the through groove (104) are respectively provided with two cylindrical first through holes (105), and the hinge (14) is provided inside the first through holes (105); the first boss (102) is symmetrically provided with four cylindrical second through holes (106), and the screw (11) is provided inside the second through holes (106); the rear end surface of the second boss (103) is symmetrically provided with four cylindrical first grooves (107), and the round rod (10) is provided inside the first grooves (107); The second bracket (3) is composed of a second body (301) and a third boss (302) connected together, the second body (301) and the third boss (302) are both rectangular parallelepiped symmetrical structures, and the third boss (302) is located on the upper end surface of the second body (301); a cylindrical second groove (303) is provided on the rear end surface of the second body (301), and the rolling bearing (12) is inserted into the second groove (303); a cylindrical fourth through hole (304) is provided at the axial position of the second groove (303), and the first bearing section (202) of the rotating shaft (2) is inserted into the fourth through hole (304); four cylindrical fifth through holes (305) are symmetrically provided on the third boss (302), and the screw (11) is inserted into the fifth through hole (305); The third bracket (5) is composed of a third body (501), two fourth bosses (502) and two second bearing sections (503) connected together; the third body (501) and the fourth bosses (502) are both rectangular parallelepiped symmetrical structures; the two fourth bosses (502) are simultaneously located on the lower end surface of the third body (501); the two second bearing sections (503) are respectively located on the front and rear end surfaces of the third body (501); the fourth bosses (502) are symmetrically provided with four first screw holes (504), and the screws (11) are screwed into the first screw holes (504); the second bearing section (503) is a cylindrical symmetrical structure, and is used to pass the rolling bearing (12); The fourth bracket (7) is composed of a fifth body (701) and two sixth bosses (702) connected together. The fifth body (701) and the sixth bosses (702) are both rectangular parallelepiped symmetrical structures. The two sixth bosses (702) are respectively located on the left and right end surfaces of the fifth body (701). A ninth rectangular through hole (703) is provided in the middle of the fifth body (701). The four fifth bosses (602) of the linear bearing (6) are inserted into the ninth through hole (703). The ninth through hole ( Four cylindrical tenth through holes (704) are evenly formed around the periphery of the sixth boss (703), and the screw (11) is inserted into the tenth through hole (704); a cylindrical third groove (705) is formed on the rear end surface of the sixth boss (702), and the rolling bearing (12) is inserted into the third groove (705); an eleventh cylindrical through hole (706) is formed at the axial position of the third groove (705), and the second bearing section (503) of the third bracket (5) is inserted into the eleventh through hole (706); The fifth bracket (9) is composed of two sixth bodies (901) and a seventh boss (902) connected together; the sixth body (901) and the seventh boss (902) are both rectangular parallelepiped symmetrical structures; the seventh boss (902) is located between the two sixth bodies (901); the sixth body (901) is symmetrically provided with four third screw holes (903), and the screws (11) are screwed into the third screw holes (903); The grinding wheel (4) is a cylindrical symmetrical structure. A sixth through hole (401) in the shape of a regular octagon is provided at the axis of the grinding wheel (4). The locking section (201) of the rotating shaft (2) is inserted into the sixth through hole (401).

2. The device for grinding the outer wall of a steel pipe in a circumferential direction according to claim 1, characterized in that: The rotating shaft (2) is composed of a coaxial locking section (201) and two first bearing sections (202) connected together, and the two first bearing sections (202) are respectively located at the front and rear end surfaces of the locking section (201); the locking section (201) is a symmetrical structure in the shape of a regular octagonal prism, and is used to penetrate the sixth through hole (401) of the grinding wheel (4); the locking section (201) is symmetrically provided with two cylindrical third through holes (203), and the hinge (14) is penetrated in the third through holes (203); the first bearing section (202) is a symmetrical structure in the shape of a cylinder, and is used to penetrate the rolling bearing (12).

3. The device for grinding the outer wall of a steel pipe in a circumferential direction according to claim 1, characterized in that: The linear bearing (6) is composed of a fourth body (601) and four fifth bosses (602) connected together, and the four fifth bosses (602) are simultaneously located on the rear end surface of the fourth body (601); the fourth body (601) is a rectangular parallelepiped symmetrical structure, and the fourth body (601) is symmetrically provided with four cylindrical seventh through holes (603), and the screws (11) are penetrated through the seventh through holes (603); the fifth boss (602) is a cylindrical symmetrical structure, and an eighth cylindrical through hole (604) is provided at the axial position of the fifth boss (602), and the round rod (10) is penetrated through the eighth through hole (604), and the eighth through hole (604) also runs through the fourth body (601); a retaining frame, a ball and a retaining ring are also provided inside the fifth boss (602).

4. The device for grinding the outer wall of a steel pipe in a circumferential direction according to claim 1, characterized in that: The cushion block (8) is a rectangular parallelepiped symmetrical structure, a rectangular parallelepiped twelfth through hole (801) is provided in the middle of the cushion block (8), and four fifth bosses (602) of the linear bearing (6) are inserted into the twelfth through hole (801); four second screw holes (802) are evenly provided around the twelfth through hole (801), and the screws (11) are screwed into the second screw holes (802).

5. The device for grinding the outer wall of a steel pipe in a circumferential direction according to claim 1, characterized in that: The round rod (10) is a cylindrical symmetrical structure, the middle portion of the round rod (10) is inserted into the eighth through hole (604) of the linear bearing (6), and the two ends of the round rod (10) are inserted into the first groove (107) of the first bracket (1).

6. The device for grinding the outer wall of a steel pipe in a circumferential direction according to claim 1, characterized in that: The screw (11), the rolling bearing (12), the wheel (13) and the hinge (14) are all standard parts.

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