Device for polishing linear defects on outer wall of steel pipe

Abstract

The utility model discloses a device for polishing linear defects on the outer wall of a steel pipe, and belongs to the technical field of machining of steel pipes. The device for polishing the linear defects of the outer wall of the steel pipe comprises a bottom plate, two first supports, four second supports, two third supports, two fourth supports, a fifth support, two linear bearings, two rotating shafts, two grinding wheels, four round bars, thirty-two screws, eight rolling bearings, four hinges, eight screw rods and eight nuts. The device can achieve the purpose of rapidly polishing linear rolling marks and linear scratches on the outer wall 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 linear defects on the outer wall of a steel pipe. Background Art

[0002] At present, steel pipes are usually made by hot-rolled piercing + continuous pipe rolling + tension reduction. During the tension reduction process, if the hole type of the roller is misplaced or the hole type design is unreasonable, symmetrical linear rolling marks will be produced on the outer wall of the steel pipe; during the tension reduction or roller transportation process, if the surface of the roller is rough or sticky with foreign matter, asymmetrical linear scratches will be produced on the outer wall of the steel pipe; linear rolling marks and linear scratches are both linear defects on the outer wall of the steel pipe, and usually need to be polished to eliminate them; if the outer diameter and wall thickness of the steel pipe can meet the standard requirements after treatment, it should be released normally; if the outer diameter or wall thickness of the steel pipe cannot meet the standard requirements after treatment, it should be downgraded; the traditional grinding method is that workers use handheld grinders to gradually grind the outer wall of the steel pipe; although some companies have developed some devices for grinding the outer wall 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 linear defects on the outer wall of a steel pipe. The utility model is designed based on a symmetrical structure. The combined use of a base plate, a screw and a nut can realize the relative setting of a first bracket; the use of the first bracket can realize the positioning setting of a round rod, and the use of a round rod can realize the forward and backward movement of a linear bearing according to a predetermined trajectory; the use of a screw can realize the linkage of a fifth bracket and a linear bearing, and the combined use of the fifth bracket and a screw can realize the relative setting of a third bracket; the combined use of a third bracket and a rolling bearing can realize the directional swing of a fourth bracket, and the combined use of a fourth bracket and a screw can realize the relative setting of a second bracket; the combined use of a second bracket and a rolling bearing can realize the rotation of a rotating shaft, and the combined use of a rotating shaft and a hinge can realize the positioning rotation of a grinding wheel, thereby realizing the purpose of quickly grinding linear defects on the outer wall of a 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 linear defects of the outer wall of a steel pipe provided by the utility model comprises: a bottom plate, two first brackets, four second brackets, two third brackets, two fourth brackets, a fifth bracket, two linear bearings, two rotating shafts, two grinding wheels, four round rods, thirty-two screws, eight rolling bearings, four hinges, eight screw rods and eight nuts;

[0010] The first bracket is composed of a first body, a first boss, a second boss and a third boss, the first body, the first boss, the second boss and the third boss are all rectangular parallelepiped symmetrical structures, the first boss is located on the upper end surface of the first body, the second boss is located on the upper end surface of the first boss, and the third boss is located on the rear end surface of the second boss; the first body is symmetrically provided with four cylindrical second through holes, and the screw is passed through the second through holes; the rear end surface of the third boss is symmetrically provided with four cylindrical first grooves, and the round rod is passed through the first groove;

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

[0012] The third bracket is composed of a third body and a fifth boss connected together, the third body and the fifth boss are both rectangular parallelepiped symmetrical structures, the fifth boss is located on the upper end surface of the third body; the left end surface of the third body is symmetrically provided with two cylindrical third grooves, the rolling bearing is penetrated in the third grooves; the axis position of the third groove is provided with a cylindrical fifth through hole, the first bearing section of the fourth bracket is penetrated in the fifth through hole; the fifth boss is symmetrically provided with four cylindrical sixth through holes, the screw is penetrated in the sixth through hole;

[0013] The fourth bracket is composed of a fourth body, two sixth bosses and two first bearing segments, the fourth body and the sixth boss are both rectangular parallelepiped symmetrical structures, the two sixth bosses are simultaneously located on the lower end surface of the fourth body, and the two first bearing segments are respectively located on the left and right end surfaces of the fourth body; the sixth boss is symmetrically provided with four first screw holes, and the screws are screwed into the first screw holes; the first bearing segment is a cylindrical symmetrical structure, which is used to penetrate the rolling bearing;

[0014] The fifth bracket is composed of two sixth bodies and an eighth boss connected together, the sixth body and the eighth boss are both rectangular parallelepiped symmetrical structures, and the eighth boss is located between the two sixth bodies; the sixth body is symmetrically provided with four second screw holes, and the screws are screwed into the second screw holes; a ninth rectangular through hole is provided in the middle of the eighth boss, and the four seventh bosses of the linear bearing are penetrated into the ninth through hole; four third screw holes are evenly provided around the ninth through hole, and the screws are screwed into the third screw holes;

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

[0016] In some embodiments, the bottom plate is a symmetrical rectangular parallelepiped structure, and two groups of eight cylindrical first through holes are symmetrically opened on the bottom plate, and the screw rods are passed through the first through holes.

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

[0018] In some embodiments, the rotating shaft is composed of a coaxial locking section and two second bearing sections, and the two second bearing sections are respectively located on the left and right end faces of the locking section; the locking section is a symmetrical structure in the shape of a regular octahedron, used to pass the eleventh through hole of the grinding wheel; the locking section is symmetrically provided with two cylindrical tenth through holes, and the hinge is passed through the tenth through hole; the second bearing section is a symmetrical structure in the shape of a cylinder, used to pass the rolling bearing.

[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 nut is screwed onto the threaded end of the screw.

[0021] In some embodiments, the screw, the rolling bearing, the hinge, the threaded rod and the nut are all standard parts.

[0022] The beneficial effects of the utility model are as follows:

[0023] 1) The device for grinding the linear defects on the outer wall of a steel pipe provided by the utility model comprises a base plate, two first brackets, four second brackets, two third brackets, two fourth brackets, a fifth bracket, two linear bearings, two rotating shafts, two grinding wheels, four round rods, thirty-two screws, eight rolling bearings, four hinges, eight screws and eight nuts. Since the material is common and convenient for processing and forming, the manufacturing cost of the device of the utility model is relatively low.

[0024] 2) The utility model grinds the linear rolling marks. Initially, the two fourth brackets are both in a horizontal setting, the steel pipe is set directly below the fifth bracket, and it is ensured that the portion with the linear rolling marks is set upward; the two fourth brackets are simultaneously swung forward 90 degrees so that the two fourth brackets are both in a vertical setting; the two rotating shafts are simultaneously slowly rotated forward or reversely, and the fifth bracket is moved at a constant speed along the four round rods so that the two grinding wheels can grind the portion with the linear rolling marks on the steel pipe; when all the linear rolling marks are grinded away, the fifth bracket is stopped from moving, the two fourth brackets are simultaneously swung reversely 90 degrees so that the two fourth brackets are both in a horizontal setting, the steel pipe is rotated 180 degrees so that the portion with the linear rolling marks on the steel pipe is set upward, and the above operation is repeated to grind away all the linear rolling marks. Therefore, the operation of grinding the linear rolling marks by the utility model device is relatively simple.

[0025] 3) The utility model grinds linear scratches. Initially, the two fourth brackets are both in a horizontal setting, the steel pipe is set directly below the fifth bracket, and it is ensured that the portion of the steel pipe with linear scratches is set upward; the two fourth brackets are simultaneously swung forward 90 degrees so that the two fourth brackets are both in an upright setting; the two rotating shafts are simultaneously slowly rotated forward or reversely, and the fifth bracket is moved at a constant speed along the four round rods so that the two grinding wheels can contact the portion of the steel pipe with linear scratches; the steel pipe is lifted at a constant speed so that the two grinding wheels can grind the portion of the steel pipe with linear scratches, and when the linear scratches are ground off, the lifting of the steel pipe is stopped; the fifth bracket is moved at a constant speed along the four round rods so that all linear scratches on the outer wall of the steel pipe are ground off. Therefore, the operation of grinding linear scratches with the utility model device is relatively simple.

[0026] 4) The utility model is designed based on a symmetrical structure. The combined use of the base plate, the screw and the nut can realize the relative setting of the first bracket; the use of the first bracket can realize the positioning setting of the round rod, and the use of the round rod can realize the forward and backward movement of the linear bearing according to a predetermined trajectory; the use of the screw can realize the linkage of the fifth bracket and the linear bearing, and the combined use of the fifth bracket and the screw can realize the relative setting of the third bracket; the combined use of the third bracket and the rolling bearing can realize the directional swing of the fourth bracket, and the combined use of the fourth bracket and the screw can realize the relative setting of the second bracket; the combined use of the second bracket and the rolling bearing can realize the rotation of the rotating shaft, and the combined use of the rotating shaft and the hinge can realize the positioning rotation of the grinding wheel, thereby achieving the purpose of quickly grinding the linear defects on the outer wall of the steel pipe. Therefore, the use effect of the device of the utility model is relatively good.

[0027] The device for grinding linear defects on the outer wall of a steel pipe provided by the utility model can achieve the purpose of quickly grinding linear rolling marks and linear scratches on the outer wall of a 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

[0028] Figure 1 It is a left-side structural schematic diagram of the fourth bracket of the device of the utility model when it is arranged horizontally;

[0029] Figure 2 It is a schematic diagram of the top view of the structure when the fourth bracket of the device of the utility model is arranged horizontally;

[0030] Figure 3 It is a schematic diagram of the main structure when the fourth bracket of the device of the utility model is erected;

[0031] Figure 4 It is a left-side structural schematic diagram of the fourth bracket of the device of the utility model when it is set upright;

[0032] Figure 5 It is a top view structural schematic diagram of the bottom plate of the device of the utility model;

[0033] Figure 6 This is a schematic diagram of the main structure of the first bracket of the device of the utility model;

[0034] Figure 7 It is a left-side structural schematic diagram of the first bracket of the device of the utility model;

[0035] Figure 8 It is a schematic diagram of the top view of the first bracket of the device of the utility model;

[0036] Fig. 9 It is a schematic diagram of the main structure of the second bracket of the device of the utility model;

[0037] Fig.10 It is a left-side structural schematic diagram of the second bracket of the device of the utility model;

[0038] Fig.11 This is a schematic diagram of the main structure of the third bracket of the device of the utility model;

[0039] Fig.12 It is a left-side structural schematic diagram of the third bracket of the device of the utility model;

[0040] Fig.13 This is a schematic diagram of the main structure of the fourth bracket of the device of the utility model;

[0041] Fig.14 It is a left-side structural schematic diagram of the fourth bracket of the device of the utility model;

[0042] Fig.15 This is a schematic diagram of the main structure of the linear bearing of the device of the utility model;

[0043] Fig.16 It is a bottom view structural diagram of the linear bearing of the device of the utility model;

[0044] Fig.17 This is a schematic diagram of the main structure of the fifth bracket of the device of the utility model;

[0045] Fig.18 It is a left-side structural schematic diagram of the fifth bracket of the device of the utility model;

[0046] Fig.19 It is a schematic diagram of the main structure of the rotating shaft of the device of the utility model;

[0047] Fig. 20 It is a left-side structural schematic diagram of the grinding wheel of the device of the utility model;

[0048] Fig.21 It is a left-side structural schematic diagram of a round rod of the device of the utility model;

[0049] Fig. 22 It is a left-side structural schematic diagram of the fourth bracket of the device of the utility model swinging forward;

[0050] Fig.23 It is a left-side structural schematic diagram of the fourth bracket of the device of the utility model swinging in the reverse direction;

[0051] Fig.24 It is a left-side structural schematic diagram of the device of the utility model when the rotating shaft rotates in the forward direction;

[0052] Fig.25 It is a left-side structural schematic diagram of the device of the utility model when the rotating shaft rotates in the reverse direction.

[0053] Explanation of the reference numerals: 1-bottom plate; 101-first through hole; 2-first bracket; 201-first body; 202-first boss; 203-second boss; 204-third boss; 205-second through hole; 206-first groove; 3-second bracket; 301-second body; 302-fourth boss; 303-second groove; 304-third through hole; 305-fourth through hole; 4-third bracket; 401-third body; 402-fifth boss; 403-third groove; 404-fifth through hole; 405-sixth through hole; 5-fourth bracket; 501-fourth body; 502-fifth boss; 503-third groove; 404-fifth through hole; 405-sixth through hole; Six bosses; 503-first bearing section; 504-first screw hole; 6-linear bearing; 601-fifth body; 602-seventh boss; 603-seventh through hole; 604-eighth through hole; 7-fifth bracket; 701-sixth body; 702-eighth boss; 703-second screw hole; 704-ninth through hole; 705-third screw hole; 8-rotating shaft; 801-positioning section; 802-second bearing section; 803-tenth through hole; 9-grinding wheel; 901-eleventh through hole; 10-round rod; 11-screw; 12-rolling bearing; 13-reamer; 14-screw; 15-nut; 16-steel pipe. DETAILED DESCRIPTION

[0054] 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.

[0055] Combination Figures 1 to 4 As shown, the utility model provides a device for grinding linear defects on the outer wall of a steel pipe, which includes a base plate 1, two first brackets 2, four second brackets 3, two third brackets 4, two fourth brackets 5, a fifth bracket 7, two linear bearings 6, two rotating shafts 8, two grinding wheels 9, four round rods 10, thirty-two screws 11, eight rolling bearings 12, four hinges 13, eight screws 14 and eight nuts 15; wherein, the two first brackets 2 are relatively arranged on the base plate 1, and are connected by the eight screws 14 and the eight nuts 15; the eight end portions of the four round rods 10 are penetrated in the eight first grooves 206 of the two first brackets 2, and the middle portions of the four round rods 10 are penetrated in the eight eighth through holes 604 of the two relatively arranged linear bearings 6; the eight seventh bosses 602 of the two linear bearings 6 are penetrated in the ninth through hole 704 of the fifth bracket 7, and are connected by the eight screws 11 is connected; two fifth bosses 402 of two third brackets 4 are arranged outside the two sixth bodies 701 of the fifth bracket 7, and are connected by eight screws 11; four rolling bearings 12 are inserted into the four third grooves 403 of the two third brackets 4, and four first bearing segments 503 of two fourth brackets 5 are inserted into the four rolling bearings 12; four fourth bosses 302 of four second brackets 3 are arranged outside the four sixth bosses 502 of the two fourth brackets 5, and are connected by sixteen screws 11; four rolling bearings 12 are inserted into the four second grooves 303 of the four second brackets 3, and four second bearing segments 802 of two rotating shafts 8 are inserted into the four rolling bearings 12; two locking segments 801 of the two rotating shafts 8 are inserted into the two eleventh through holes 901 of the two grinding wheels 9, and are positioned by four hinges 13.

[0056] The assembly process of the device for grinding linear defects on the outer wall of a steel pipe provided by the utility model

[0057] Combination Figures 1 to 21As shown, firstly, the two linear bearings 6 are arranged relative to each other, and then the eight seventh bosses 602 of the two linear bearings 6 are inserted into the ninth through hole 704 of the fifth bracket 7, and the eight seventh through holes 603 of the two linear bearings 6 and the four third screw holes 705 of the fifth bracket 7 are aligned, and then the eight screws 11 are passed through the eight seventh through holes 603 and screwed into the four third screw holes 705, so that the two linear bearings 6 and the fifth bracket 7 can be assembled;

[0058] 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 2 are arranged opposite to each other, and then the eight ends of the four round rods 10 are inserted into the eight first grooves 206 of the two first brackets 2. In this way, the two linear bearings 6, the four round rods 10 and the two first brackets 2 can be assembled;

[0059] Then, two first brackets 2 are simultaneously arranged on the bottom plate 1, and the eight second through holes 205 of the two first brackets 2 are aligned with the eight first through holes 101 of the bottom plate 1, and then eight screw rods 14 are passed through the eight groups of aligned through holes, and then eight nuts 15 are screwed onto the threaded ends of the eight screw rods 14, so that the two first brackets 2 and the bottom plate 1 can be assembled;

[0060] Then, four rolling bearings 12 are installed in the four third grooves 403 of the two third brackets 4, and then the two third brackets 4 are arranged relative to each other, and then the four first bearing sections 503 of the two fourth brackets 5 are inserted into the four rolling bearings 12, so that the two third brackets 4, the four rolling bearings 12 and the two fourth brackets 5 can be assembled;

[0061] Then, the two fifth bosses 402 of the two third brackets 4 are sleeved outside the two sixth bodies 701 of the fifth bracket 7, and the eight sixth through holes 405 of the two third brackets 4 are aligned with the eight second screw holes 703 of the fifth bracket 7, and then the eight screws 11 are passed through the eight sixth through holes 405 and screwed into the eight second screw holes 703, so that the two third brackets 4 and the fifth bracket 7 can be assembled;

[0062] Then, the two clamping sections 801 of the two rotating shafts 8 are respectively inserted into the two eleventh through holes 901 of the two grinding wheels 9, and then four hinges 13 are installed in the four tenth through holes 803 of the two rotating shafts 8. In this way, the two rotating shafts 8 and the two grinding wheels 9 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 second bearing sections 802 of the two rotating shafts 8 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 8 can be assembled;

[0064] Then, the four fourth bosses 302 of the four second brackets 3 are sleeved outside the four sixth bosses 502 of the two fourth brackets 5, and the sixteen fourth through holes 305 of the four second brackets 3 and the sixteen first screw holes 504 of the two fourth brackets 5 are aligned, and then the sixteen screws 11 are passed through the sixteen fourth 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] Definition rules for the swing direction of the fourth bracket of the device for grinding linear defects on the outer wall of a steel pipe provided by the utility model

[0066] Combination Figure 1 and Figure 4 As shown, based on the left-side structural schematic diagram of the device of the utility model, for the convenience of description, the fourth bracket 5 located on the left is defined as ①, and the fourth bracket 5 located on the right is defined as ②, wherein the four first bearing sections 503 of the two fourth brackets 5 are all swing axes;

[0067] Combination Figure 1 As shown, it is assumed that the two fourth brackets 5 are initially in a horizontal arrangement, and after simplification, Fig. 22 As shown, the ① swings 90 degrees in the counterclockwise direction, and the ② swings 90 degrees in the clockwise direction, then the two fourth brackets 5 are both in an upright position, and this swinging direction of the fourth bracket 5 may be defined as a positive direction;

[0068] Combination Figure 4 As shown, it is assumed that the two fourth brackets 5 are initially in an upright position, and after simplification, Fig.23 As shown, ① swings 90 degrees in the clockwise direction, and ② swings 90 degrees in the counterclockwise direction, and the two fourth brackets 5 are both in a horizontal setting. It may be appropriate to define this swinging direction of the fourth bracket 5 as reverse.

[0069] Definition rules for the rotation direction of the rotating shaft of the device for grinding linear defects on the outer wall of a steel pipe provided by the utility model

[0070] Combination Figure 4As shown, based on the left-side structural schematic diagram of the device of the utility model, for the convenience of description, the rotating shaft 8 located on the left is defined as ③, and the rotating shaft 8 located on the right is defined as ④. At this time, the two grinding wheels 9 are tangent to the steel pipe 16, that is, the two grinding wheels 9 can grind the outer wall of the steel pipe 16;

[0071] Combination Fig.24 As shown, assuming that the steel pipe 16 remains stationary, 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 9 are exactly opposite, which can ensure the force balance of the steel pipe 16 to achieve stable operation of the device. It is better to define this rotation direction of the rotating shaft 8 as the positive direction;

[0072] Combination Fig.25 As shown, assuming that the steel pipe 16 remains stationary, 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 9 are exactly opposite, which can ensure the force balance of the steel pipe 16 to achieve stable operation of the device. It is better to define this rotation direction of the rotating shaft 8 as reverse;

[0073] In summary, when the steel pipe 16 remains stationary, the two grinding wheels 9 should rotate slowly in opposite directions, so as to ensure the force balance of the steel pipe 16 and achieve stable operation of the device.

[0074] The utility model provides a device for grinding linear defects on the outer wall of a steel pipe and a method for grinding linear rolling marks.

[0075] Step a1: Combination Figure 1 and Figure 2 As shown, assuming that the two fourth brackets 5 are initially arranged horizontally, the steel pipe 16 is first arranged directly below the fifth bracket 7, and the portion of the steel pipe 16 with a linear rolling mark is arranged upward;

[0076] Step a2: Combination Figure 1 and Fig. 22 As shown, the two fourth brackets 5 are then simultaneously swung forward 90 degrees, so that the two fourth brackets 5 are both in an upright position, and at this time, the two grinding wheels 9 are both tangential to the steel pipe 16; then the two rotating shafts 8 are simultaneously and slowly rotated forward or reversely, and then the fifth bracket 7 is uniformly moved along the four round rods 10, so that the two grinding wheels 9 can grind the parts of the steel pipe 16 with linear rolling marks; when all the linear rolling marks are ground away, the fifth bracket 7 is stopped from moving;

[0077] Step a3: Combination Figure 4 and Fig.23 As shown, the two fourth brackets 5 are then simultaneously swung 90 degrees in the opposite direction so that the two fourth brackets 5 are both in a horizontal setting, and then the steel pipe 16 is rotated 180 degrees so that the portion of the steel pipe 16 with the linear rolling mark is set upward, and then the operation of step a2 is repeated.

[0078] The utility model provides a device for grinding linear defects on the outer wall of a steel pipe and a method for grinding linear scratches.

[0079] Step b1: Combination Figure 1 and Figure 2 As shown, assuming that the two fourth brackets 5 are initially arranged horizontally, the steel pipe 16 is first arranged directly below the fifth bracket 7, and the portion of the steel pipe 16 with linear scratches is arranged upward;

[0080] Step b2: Combination Figure 1 and Fig. 22 As shown, the two fourth brackets 5 are then simultaneously swung forward 90 degrees, so that the two fourth brackets 5 are both in an upright position, and at this time, the two grinding wheels 9 are both tangential to the steel pipe 16; then the two rotating shafts 8 are simultaneously and slowly rotated forward or reversely, and then the fifth bracket 7 is uniformly moved along the four round rods 10, so that the two grinding wheels 9 can contact the portion of the steel pipe 16 where there are linear scratches;

[0081] Step b3: Then lift the steel pipe 16 at a uniform speed so that the two grinding wheels 9 can grind the parts of the steel pipe 16 with linear scratches. When the linear scratches are ground off, stop lifting the steel pipe 16; then move the fifth bracket 7 at a uniform speed along the four round rods 10 and grind off all the linear scratches.

[0082] Supplementary explanation: The device for grinding linear defects on the outer wall of a steel pipe 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.

[0083] It can be seen from the embodiments that the device for grinding linear defects on the outer wall of a steel pipe provided by the utility model can achieve the purpose of quickly grinding linear rolling marks and linear scratches on the outer wall of a steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect.

[0084] 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 linear defects on the outer wall of a steel pipe, characterized in that: The device for grinding linear defects on the outer wall of a steel pipe comprises: a base plate (1), two first brackets (2), four second brackets (3), two third brackets (4), two fourth brackets (5), a fifth bracket (7), two linear bearings (6), two rotating shafts (8), two grinding wheels (9), four round rods (10), thirty-two screws (11), eight rolling bearings (12), four hinges (13), eight screw rods (14) and eight nuts (15), wherein: The first bracket (2) is composed of a first body (201), a first boss (202), a second boss (203) and a third boss (204), the first body (201), the first boss (202), the second boss (203) and the third boss (204) are all rectangular parallelepiped symmetrical structures, the first boss (202) is located on the upper end surface of the first body (201), the second boss (203) is located on the upper end surface of the first boss (202), and the third boss (204) is located on the rear end surface of the second boss (203); the first body (201) is symmetrically provided with four cylindrical second through holes (205), and the screw rod (14) is passed through the second through holes (205); the rear end surface of the third boss (204) is symmetrically provided with four cylindrical first grooves (206), and the round rod (10) is passed through the first grooves (206); The second bracket (3) is composed of a second body (301) and a fourth boss (302) connected together, the second body (301) and the fourth boss (302) are both rectangular parallelepiped symmetrical structures, and the fourth boss (302) is located on the upper end surface of the second body (301); a cylindrical second groove (303) is provided on the left end surface of the second body (301), and the rolling bearing (12) is inserted into the second groove (303); a cylindrical third through hole (304) is provided at the axial position of the second groove (303), and the second bearing section (802) of the rotating shaft (8) is inserted into the third through hole (304); four cylindrical fourth through holes (305) are symmetrically provided on the fourth boss (302), and the screw (11) is inserted into the fourth through hole (305); The third bracket (4) is composed of a third body (401) and a fifth boss (402) connected together, the third body (401) and the fifth boss (402) are both rectangular parallelepiped symmetrical structures, and the fifth boss (402) is located on the upper end surface of the third body (401); the left end surface of the third body (401) is symmetrically provided with two cylindrical third grooves (403), and the rolling bearing (12) is penetrated in the third grooves (403); the axis position of the third groove (403) is provided with a cylindrical fifth through hole (404), and the first bearing section (503) of the fourth bracket (5) is penetrated in the fifth through hole (404); the fifth boss (402) is symmetrically provided with four cylindrical sixth through holes (405), and the screw (11) is penetrated in the sixth through hole (405); The fourth bracket (5) is composed of a fourth body (501), two sixth bosses (502) and two first bearing sections (503) connected together; the fourth body (501) and the sixth boss (502) are both rectangular parallelepiped symmetrical structures; the two sixth bosses (502) are simultaneously located on the lower end surface of the fourth body (501); the two first bearing sections (503) are respectively located on the left and right end surfaces of the fourth body (501); the sixth boss (502) is symmetrically provided with four first screw holes (504), and the screws (11) are screwed into the first screw holes (504); the first bearing section (503) is a cylindrical symmetrical structure, and is used to pass the rolling bearing (12); The fifth bracket (7) is composed of two sixth bodies (701) and an eighth boss (702) connected together, the sixth body (701) and the eighth boss (702) are both rectangular parallelepiped symmetrical structures, and the eighth boss (702) is located between the two sixth bodies (701); the sixth body (701) is symmetrically provided with four second screw holes (703), and the screws (11) are screwed into the second screw holes (703); a rectangular parallelepiped ninth through hole (704) is provided in the middle of the eighth boss (702), and the four seventh bosses (602) of the linear bearing (6) are penetrated into the ninth through hole (704); four third screw holes (705) are evenly provided around the ninth through hole (704), and the screws (11) are screwed into the third screw holes (705); The grinding wheel (9) is a cylindrical symmetrical structure. An eleventh through hole (901) in the shape of a regular octagon is provided at the axis position of the grinding wheel (9). A locking section (801) of the rotating shaft (8) is inserted into the eleventh through hole (901).

2. The device for grinding linear defects on the outer wall of a steel pipe according to claim 1, characterized in that: The bottom plate (1) is a rectangular parallelepiped symmetrical structure. The bottom plate (1) is symmetrically provided with two groups of eight cylindrical first through holes (101) in total. The screw rods (14) are inserted into the first through holes (101).

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

4. The device for grinding linear defects on the outer wall of a steel pipe according to claim 1, characterized in that: The rotating shaft (8) is composed of a coaxial locking section (801) and two second bearing sections (802) connected together, and the two second bearing sections (802) are respectively located on the left and right end surfaces of the locking section (801); the locking section (801) is a symmetrical structure in the shape of a regular octagonal prism, and is used to penetrate the eleventh through hole (901) of the grinding wheel (9); the locking section (801) is symmetrically provided with two cylindrical tenth through holes (803), and the hinge (13) is penetrated in the tenth through hole (803); the second bearing section (802) is a symmetrical structure in the shape of a cylinder, and is used to penetrate the rolling bearing (12).

5. The device for grinding linear defects on the outer wall of a steel pipe 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 (206) of the first bracket (2).

6. The device for grinding linear defects on the outer wall of a steel pipe according to claim 1, characterized in that: The threaded end of the screw rod (14) is screwed with the nut (15).

7. The device for grinding linear defects on the outer wall of a steel pipe according to claim 1, characterized in that: The screw (11), the rolling bearing (12), the hinge (13), the screw rod (14) and the nut (15) are all standard parts.

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