CN214771135U - Device for grinding outer surface of steel pipe - Google Patents

Abstract

The utility model discloses a device of coping steel pipe surface belongs to machining technical field. The device provided by the utility model comprises a first support, two chuck heads, two chuck bodies, a bottom plate, a second support, two extension boards, a bearing support, eight movable claws, eight little bevel gears, two big bevel gears, four rolls, two bearing extension boards, a backing plate, two cushions, an abrasive band, four first wheels, four second wheels, eight third wheels, four first hinges, four second hinges, eight third hinges, two first antifriction bearings, eight second antifriction bearings, twelve first screws, four second screws, twelve first nuts, twelve second nuts and eight screws, the device can carry out the coping to the surface of steel pipe fast and efficient, and have low in manufacturing cost, easy operation, effectual characteristics of coping.

Description

Device for grinding outer surface of steel pipe

Technical Field

The utility model belongs to the technical field of machining, concretely relates to device of coping steel pipe surface.

Background

At present, in seamless steel pipe production enterprises, a pipe manufacturing process of hot rolling perforation, continuous pipe rolling and tension reducing is generally adopted, the inner surface and the outer surface of a steel pipe can generate iron scales with certain thickness inevitably, a certain degree of corrosion can be generated when the steel pipe is stored in a humid environment, the surface quality of the steel pipe can be directly influenced, and further the service performance and the processing performance of the steel pipe can be influenced.

Document CN202701925U discloses a steel tube outer circle sharpening machine, which mainly comprises a grinding head unit, a sharpening trolley, a pair wheel supporting device, a trolley track, a lifting device and a pin tooth transmission system, wherein the steel tube is driven to rotate by the pair wheel supporting device, so that the stability of the device disclosed by the patent is relatively poor.

Document CN205129573U discloses a portable steel tube outer surface grinding machine, which mainly comprises a grinding wheel, a top plate, an arc bottom plate, a roller shaft, a guide pillar, a connecting plate, a guide sleeve, a pressing block, a lead screw, a nut and a motor, wherein the grinding wheel of the device rotates and revolves around the steel tube, so that the stability of the device is relatively poor.

Document CN206200688U discloses a novel belt sander for steel pipe surface, which mainly comprises a handle, a frame, a driven wheel, a sanding belt, a driving wheel, a motor, a bolt, a spring, a pin shaft and a connecting plate, wherein the tension position of the spring between the frame and the connecting plate needs to be continuously adjusted to ensure that the sanding belt and the steel pipe have proper tension, so that the operation of the device is relatively complicated.

SUMMERY OF THE UTILITY MODEL

One or more to the problem that exists among the prior art, the utility model provides a device of coping steel pipe surface, it includes a first support (2), two chuck heads (3), two chuck bodies (4), a bottom plate (5), a second support (8), two spinal branch boards (9), a bearing support (12), eight movable claw (13), eight bevel pinion gears (14), two big bevel gear (21), four rolls (17), two spinal branch boards (18), a backing plate (1), two cushion (19), an abrasive band (20), four first wheels (a15), four second wheels (b15), eight third wheels (c15), four first hinges (a7), four second hinges (b7), eight third hinges (c7), two first antifriction bearing (a16), eight second antifriction bearing (b16), twelve first screw rods (a10), Four second screws (b10), twelve first nuts (a11), four second nuts (b11) and eight screws (22); wherein:

the first bracket (2) is formed by connecting a first main body (202), a first boss (203) and two second bosses (204), and the first main body (202), the first boss (203) and the second bosses (204) are all of rectangular symmetrical structures; the first boss (203) is arranged on the upper surface of the first main body (202), a cylindrical first groove (207) is formed in the first boss (203), and the first rolling bearing (a16) is mounted in the first groove (207); a cylindrical second through hole (206) is formed in the axis position of the first groove (207), and a bearing section (303) of the chuck head (3) penetrates through the second through hole (206); the two second bosses (204) are symmetrically arranged on the lower surface of the first main body (202), each second boss (204) is provided with a first through groove (205) in a rectangular shape, and the first wheel (a15) penetrates through the first through groove (205); two cylindrical first through holes (201) are formed in two sides of each first through groove (205), and a first hinge (a7) penetrates through each first through hole (201);

the chuck head (3) is formed by connecting a bearing section (303), a second main body (304), four third bosses (302) and a fourth boss (306), the bearing section (303), the second main body (304) and the fourth boss (306) are coaxially connected and have cylindrical symmetrical structures, and the third boss (302) is in a rectangular symmetrical structure; the bearing section (303) is arranged at the left end of the second main body (304) and is used for penetrating the first rolling bearing (a 16); the four third bosses (302) are arranged at the right end of the second main body (304) along the circumferential direction, each third boss (302) is provided with a second rectangular through groove (305), and an annular groove (1404) of the small bevel gear (14) is arranged in each second through groove (305) in a penetrating manner; the fourth boss (306) is arranged at the right end of the second main body (304) and is used for penetrating through a fourteenth through hole (2101) of the bevel gear (21); four second rectangular grooves (301) are uniformly formed in the side face of the fourth boss (306) along the circumferential direction, and an insertion section (1401) of the small bevel gear (14) penetrates through the second grooves (301); the end surface of the fourth boss (306) is uniformly provided with four first screw holes (307) along the circumferential direction, and the screws (22) are screwed in the first screw holes (307);

the chuck body (4) is formed by connecting a fifth boss (401), a third main body (402) and a sixth boss (405) which are coaxially connected, and the fifth boss (401), the third main body (402) and the sixth boss (405) are all in cylindrical symmetrical structures; the sixth boss (405) and the fifth boss (401) are respectively arranged at the left end and the right end of the third main body (402), four second screw holes (407) are uniformly formed in the end face of the fifth boss (401) along the circumferential direction, and the screws (22) are screwed in the second screw holes (407); four I-shaped third grooves (404) are uniformly formed in the side face of the third main body (402) along the circumferential direction, and the movable clamping jaws (13) penetrate through the third grooves (404); four cylindrical third through holes (403) are uniformly formed in the side surface of the third main body (402) along the circumferential direction, and the small bevel gear (14) penetrates through the third through holes (403); the end surface of the third main body (402) is provided with a cylindrical fourth groove (406), and the bevel gear (21) penetrates through the fourth groove (406); the sixth boss (405) is positioned in the fourth groove (406), and the second screw hole (407) also penetrates through the sixth boss (405);

the bottom plate (5) is of a cuboid plate-shaped symmetrical structure; four cylindrical fourth through holes (503) are symmetrically formed in the bottom plate (5), the first screw (a10) penetrates through the fourth through holes (503), and one end of the first screw (a10) is screwed with the first nut (a 11); two cuboid-shaped fifth grooves (501) are symmetrically formed in the upper surface of the bottom plate (5), and the first wheels (a15) are arranged in the fifth grooves (501); the upper surface of the bottom plate (5) is also symmetrically provided with two cuboid-shaped sixth grooves (502), and the second wheels (b15) are arranged in the sixth grooves (502);

the second bracket (8) is formed by connecting a fourth main body (803) and two seventh bosses (802); the fourth main body (803) and the seventh bosses (802) are both rectangular parallelepiped symmetrical structures, and the two seventh bosses (802) are symmetrically arranged on the lower surface of the fourth main body (803); each seventh boss (802) is provided with a third through groove (804) in a cuboid shape, and the second wheel (b15) penetrates through the third through groove (804); two cylindrical fifth through holes (801) are formed in two sides of each third through groove (804), and a second hinge (b7) penetrates through each fifth through hole (801); the fourth main body (803) is symmetrically provided with four cylindrical sixth through holes (805), the first screw (a10) penetrates through the sixth through holes (805), and one end of the first screw (a10) is screwed with the first nut (a 11);

the support plate (9) is formed by connecting a fifth main body (901) and an eighth boss (903); the fifth main body (901) and the eighth boss (903) are both rectangular plate-shaped symmetrical structures, and the eighth boss (903) is vertically arranged on the upper surface of the fifth main body (901); the fifth main body (901) is symmetrically provided with four cylindrical seventh through holes (904), the first screw (a10) penetrates through the seventh through holes (904), and one end of the first screw (a10) is screwed with the first nut (a 11); the eighth boss (903) is symmetrically provided with two cuboid-shaped seventh grooves (902), and the third wheel (c15) is arranged in the seventh grooves (902);

the bearing support (12) is formed by connecting a sixth main body (1201) and a ninth boss (1202); the sixth main body (1201) and the ninth boss (1202) are both of a cuboid-shaped symmetrical structure, and the ninth boss (1202) is arranged on the upper surface of the sixth main body (1201); the ninth boss (1202) is provided with an eighth cylindrical groove (1204), and the first rolling bearing (a16) is mounted in the eighth groove (1204); an eighth cylindrical through hole (1203) is formed in the axial line position of the eighth groove (1204), and a bearing section (303) of the chuck head (3) penetrates through the eighth through hole (1203); the sixth body (1201) is symmetrically provided with four cylindrical ninth through holes (1205), the first screw (a10) penetrates through the ninth through holes (1205), and one end of the first screw (a10) is screwed with the first nut (a 11);

the movable jaw (13) is formed by connecting a plurality of racks (1303), a seventh main body (1302) and a tenth boss (1304), and the seventh main body (1302) and the tenth boss (1304) are of rectangular symmetrical structures; the tenth boss (1304) is arranged at the right end of the seventh main body (1302) and used for clamping a steel pipe to be polished; a rectangular fourth through groove (1301) is formed in each of the front side and the rear side of the seventh main body (1302), so that an I-shaped symmetrical structure is formed and used for clamping the movable clamping jaws (13); a plurality of the racks (1303) are uniformly arranged at the left end of the seventh main body (1302) and are used for engaging the plane thread (2104) of the bevel gear (21);

the small bevel gear (14) is formed by connecting an eighth main body (1403), a plurality of first conical teeth (1402) and an insertion section (1401) which are coaxially connected, and the eighth main body (1403) and the insertion section (1401) are both of cylindrical symmetrical structures; a cuboid-shaped ninth groove (1405) is formed in the end face of the eighth main body (1403) along the axis direction, an annular groove (1404) is formed in the side face of the eighth main body (1403) along the circumferential direction, and a third boss (302) of the chuck head (3) penetrates through the annular groove (1404); the first conical teeth (1402) are uniformly arranged along the circumferential direction, and the insertion section (1401) is used for penetrating through a second groove (301) of the chuck head (3) so as to axially position the small bevel gear (14) penetrating into the third through hole (403);

the big bevel gear (21) is formed by connecting a plurality of second conical teeth (2103), a ninth main body (2102) and a group of plane threads (2104) which are coaxially connected; the ninth main body (2102) is of a cylindrical symmetrical structure, a cylindrical fourteenth through hole (2101) is formed in the ninth main body (2102) along the axis direction, and a fourth boss (306) of the chuck head (3) penetrates through the fourteenth through hole (2101); a plurality of second tapered teeth (2103) are uniformly arranged at the left end of the ninth main body (2102) along the circumferential direction and are used for engaging with the first tapered teeth (1402) of the small bevel gear (14); the plane thread (2104) is provided at the right end of the ninth main body (2102) for engaging the rack (1303) of the movable jaw (13);

the roller (17) is formed by connecting roller heads (1701) at two ends and a roller body (1702) in the middle, and the roller heads (1701) and the roller body (1702) are of cylindrical symmetrical structures; the roller head (1701) is used for penetrating the second rolling bearing (b16), and the roller body (1702) is used for conveying the abrasive belt (20);

the bearing support plate (18) is of a cuboid plate-shaped symmetrical structure; a cuboid fifth through groove (1801) is respectively formed at the front end and the rear end of the bearing support plate (18), and the third wheel (c15) penetrates through the fifth through groove (1801); two cylindrical tenth through holes (1802) are formed in two sides of each fifth through groove (1801), and third hinges (c7) penetrate through the tenth through holes (1802); the bearing support plate (18) is symmetrically provided with four cylindrical tenth grooves (1805), and the second rolling bearing (b16) is mounted in the tenth grooves (1805); an eleventh cylindrical through hole (1803) is formed in the axial position of each tenth groove (1805), and a roller head (1701) of the roller (17) penetrates through the eleventh through hole (1803); the bearing support plate (18) is further symmetrically provided with four cylindrical twelfth through holes (1804), the second screw rod (b10) penetrates through the twelfth through holes (1804), and one end of the second screw rod (b10) is screwed with the second nut (b 11);

the base plate (1) is of a cuboid plate-shaped symmetrical structure and is used for keeping the bottom plate (5) in a horizontal state;

the cushion block (19) is of a cuboid-shaped symmetrical structure, two cylindrical thirteenth through holes (1901) are symmetrically formed in the cushion block (19), the second screw (b10) penetrates through the thirteenth through holes (1901), and one end of the second screw (b10) is screwed with the second nut (b 11);

the abrasive belt (20) is of an annular belt-shaped structure, and one surface of the abrasive belt is provided with abrasive materials for grinding the outer surface of the steel pipe; the other side of the abrasive belt is connected with a roller body (1702) of the roller (17) and is used for transmitting power;

the first rolling bearing (a16), the second rolling bearing (b16), the first wheel (a15), the second wheel (b15), the third wheel (c15), the first hinge (a7), the second hinge (b7), the third hinge (c7), the first screw rod (a10), the second screw rod (b10), the first nut (a11), the second nut (b11) and the screw (22) are all standard parts.

The device of coping steel pipe surface that provides based on above technical scheme is by a first support, two chuck heads, two chuck bodies, a bottom plate, a second support, two extension boards, a bearing support, eight movable claws, eight bevel pinion, two big bevel gears, four rolls, two bearing extension boards, a backing plate, two cushion blocks, an abrasive band, four first wheels, four second wheels, eight third wheels, four first hinges, four second hinges, eight third hinges, two first antifriction bearings, eight second antifriction bearings, twelve first screw rods, four second screw rods, twelve first nuts, four second nuts and eight screws are constituteed, the material is ordinary, and convenient machine-shaping, consequently, the utility model discloses the manufacturing cost of device is relatively lower.

When the device is used, the small bevel gear is rotated to fold the eight movable clamping jaws, the first bracket vehicle is pulled rightwards along the fifth groove, and the bearing support plate vehicle is pulled upwards along the seventh groove; hoisting the steel pipe between the two chuck bodies, centering the axis of the steel pipe and the chuck bodies, pushing the first support vehicle leftwards along the fifth groove, sleeving the left end and the right end of the steel pipe with four movable clamping jaws, and simultaneously rotating the bevel pinion to position and clamp the steel pipe; descending a bearing support plate vehicle along the seventh groove, simultaneously rotating the two chuck heads in the same direction, and grinding the abrasive belt on the outer surface of the steel pipe; pulling second support car along the sixth recess right and reacing a new position, repeated above-mentioned operation carries out the coping to the surface of steel pipe in new position, consequently, the utility model discloses the operation of device is fairly simple relatively.

In the device of the utility model, the chuck head, the small bevel gear, the big bevel gear, the movable clamping jaws and the chuck body are used together, so that the automatic centering of the steel pipe can be realized; the bottom plate, the bearing support, the first rolling bearing, the chuck head, the chuck body and the movable clamping jaws are used in a combined mode, and stable rotation of the steel pipe can be achieved; the first support vehicle, the second support vehicle and the bottom plate are used in a combined mode, so that the first support vehicle and the second support vehicle can move according to a preset track; the bearing support plate vehicle and the support plate are used jointly, so that the bearing support plate vehicle can move according to a preset track; the joint use of bearing extension board, second antifriction bearing, roll, cushion and abrasive band can realize carrying out safety, efficient coping to the surface of steel pipe, consequently, the utility model discloses the coping effect of device is relatively better.

Through the utility model provides a device of coping steel pipe surface can be fast and the efficient carries out the coping to the surface of steel pipe, the utility model discloses the device has low in manufacturing cost, easy operation, the effectual characteristics of coping.

Drawings

Fig. 1 is a schematic structural view of a device for grinding the outer surface of a steel pipe according to the present invention;

fig. 2 is a left side view structure schematic diagram of the device for grinding the outer surface of the steel pipe provided by the present invention;

fig. 3 is a schematic top view of the device for grinding the outer surface of the steel pipe according to the present invention;

fig. 4 is a front view structural schematic diagram of the first bracket and the first wheel after being assembled;

fig. 5 is a left side view structural schematic diagram of the first bracket and the first wheel after being assembled;

fig. 6 is a schematic bottom view of the first bracket and the first wheel assembled according to the present invention;

fig. 7 is a schematic front view of the chuck head according to the present invention;

fig. 8 is a schematic diagram of a right-view structure of the chuck head according to the present invention;

fig. 9 is a schematic front view of the chuck body according to the present invention;

fig. 10 is a left side view schematic structural diagram of the chuck body according to the present invention;

fig. 11 is a schematic diagram of a right-view structure of the chuck body according to the present invention;

fig. 12 is a schematic top view of the bottom plate according to the present invention;

fig. 13 is a front view schematically illustrating the structure of the second bracket and the second wheel after being assembled;

fig. 14 is a left side view schematic structure diagram of the second bracket and the second wheel after being assembled;

fig. 15 is a schematic bottom view of the second bracket and the second wheel assembled according to the present invention;

fig. 16 is a schematic front view of a support plate according to the present invention;

fig. 17 is a schematic top view of the support plate according to the present invention;

fig. 18 is a schematic structural diagram of a bearing support according to the present invention;

fig. 19 is a schematic top view of the bearing support according to the present invention;

fig. 20 is a schematic structural view of the movable jaw of the present invention;

fig. 21 is a schematic front view of a bevel pinion according to the present invention;

fig. 22 is a schematic top view of a bevel pinion according to the present invention;

fig. 23 is a schematic front view of the roller according to the present invention;

fig. 24 is a front view schematically illustrating the structure of the bearing support plate and the third wheel after being assembled according to the present invention;

fig. 25 is a left side view structural schematic diagram of the bearing support plate, the second rolling bearing and the third wheel provided by the present invention after being assembled;

FIG. 26 is a schematic top view of the bearing plate and third wheel assembly provided by the present invention;

fig. 27 is a schematic structural view of the assembled bearing support plate, second rolling bearing, roller, abrasive belt, cushion block and third wheel of the present invention;

fig. 28 is a left side view structural diagram of the cushion block provided by the present invention;

fig. 29 is a left side view structural schematic diagram of the bevel gear according to the present invention;

fig. 30 is a schematic view of the right side structure of the bevel gear according to the present invention;

fig. 31 is a schematic structural view of the chuck head, the bevel pinion, the bevel bull gear, the chuck body and the movable jaws of the present invention before assembly;

fig. 32 is a schematic top view of the backing plate according to the present invention;

fig. 33 is a schematic view of the working principle of the device for grinding the outer surface of the steel pipe provided by the present invention;

description of reference numerals: 1-a backing plate; 2-a first scaffold; 201-a first via; 202-a first body; 203-a first boss; 204-a second boss; 205-a first through slot; 206-a second via; 207-a first groove; 3-chuck head; 301-a second groove; 302-a third boss; 303-bearing section; 304-a second body; 305-a second through slot; 306-a fourth boss; 307-first screw hole; 4-a chuck body; 401-a fifth boss; 402-a third body; 403-a third via; 404-a third groove; 405-a sixth boss; 406-a fourth groove; 407-second screw hole; 5-a bottom plate; 501-a fifth groove; 502-sixth groove; 503-a fourth via; 6-steel pipe; a 7-first hinge; b 7-second hinge; c 7-third hinge; 8-a second scaffold; 801 a fifth via; 802-a seventh boss; 803-a fourth body; 804-a third through slot; 805-sixth vias; 9-a support plate; 901-a fifth body; 902-a seventh groove; 903-an eighth boss; 904-seventh via; a 10-first screw; b 10-second screw; a11 — first nut; b 11-second nut; 12-a bearing support; 1201-sixth body; 1202-a ninth boss; 1203-an eighth via; 1204-eighth groove; 1205-ninth via; 13-movable jaws; 1301-a fourth through groove; 1302-a seventh body; 1303-rack; 1304-tenth boss; 14-a bevel pinion gear; 1401-an insertion section; 1402-a first conical tooth; 1403-eighth body; 1404-an annular groove; 1405-ninth groove; a15 — first round; b15 — second round; c 15-third wheel; a16 — first rolling bearing; b 16-a second rolling bearing; 17-rolling; 1701-roller head; 1702-roll body; 18-a bearing support plate; 1801-fifth through slot; 1802-a tenth via; 1803-eleventh via; 1804-twelfth through hole; 1805-tenth recess; 19-cushion block; 1901-thirteenth via; 20-sanding belt; 21-big bevel gear; 2101-fourteenth via; 2102-ninth body; 2103-second tapered teeth; 2104-plane threads; 22-screw.

Detailed Description

The following detailed description of the present invention is provided by way of examples and drawings, which are only for the understanding of the present invention and are not intended to limit the present invention.

As shown in fig. 1 to 3, the device for grinding the outer surface of a steel pipe provided by the present invention comprises a first bracket 2, two chuck heads 3, two chuck bodies 4, a bottom plate 5, a second bracket 8, two support plates 9, a bearing support 12, eight movable jaws 13, eight bevel pinion gears 14, two bevel bull gears 21, four rollers 17, two bearing support plates 18, a backing plate 1, two cushion blocks 19, a sanding belt 20, four first wheels a15, four second wheels b15, eight third wheels c15, four first hinges a7, four second hinges b7, eight third hinges c7, two first rolling bearings a16, eight second rolling bearings b16, twelve first screws a10, four second screws b10, twelve first nuts a11, four second nuts b11, and eight screws 22. The above components can be made of metal materials, wherein the first rolling bearing a16, the second rolling bearing b16, the first wheel a15, the second wheel b15, the third wheel c15, the first hinge a7, the second hinge b7, the third hinge c7, the first screw a10, the second screw b10, the first nut a11, the second nut b11 and the screw 22 are standard components.

As shown in fig. 4 to fig. 6, the first bracket 2 is formed by connecting a first main body 202, a first boss 203 and two second bosses 204, and the first main body 202, the first boss 203 and the second bosses 204 are all rectangular symmetrical structures; the first boss 203 is disposed on the upper surface of the first main body 202, the first boss 203 is provided with a cylindrical first groove 207, and the first rolling bearing a16 is mounted in the first groove 207; a cylindrical second through hole 206 is formed in the axial position of the first groove 207, and a bearing section 303 of the chuck head 3 penetrates through the second through hole 206; the two second bosses 204 are symmetrically arranged on the lower surface of the first body 202, each second boss 204 is provided with a first through groove 205 in a rectangular parallelepiped shape, and the first wheel a15 penetrates through the first through groove 205; two cylindrical first through holes 201 are formed in two sides of each first through groove 205, and the first hinge a7 penetrates through the first through holes 201.

As shown in fig. 7 and 8, the chuck head 3 is formed by connecting a bearing segment 303, a second main body 304, four third bosses 302 and a fourth boss 306, the bearing segment 303, the second main body 304 and the fourth boss 306 are all coaxially connected cylindrical symmetric structures, and the third boss 302 is a rectangular parallelepiped symmetric structure; the bearing section 303 is disposed at the left end of the second main body 304, and is used for penetrating the first rolling bearing a 16; the four third bosses 302 are circumferentially arranged at the right end of the second main body 304, each third boss 302 is provided with a second through groove 305 in a rectangular shape, and an annular groove 1404 of the bevel pinion 14 is formed in the second through groove 305; the fourth boss 306 is disposed at the right end of the second main body 304, and is used for penetrating through the fourteenth through hole 2101 of the bevel gear 21; four second grooves 301 in a rectangular parallelepiped shape are uniformly formed in the side surface of the fourth boss 306 along the circumferential direction, and an insertion section 1401 of the bevel pinion 14 penetrates through the second grooves 301; four first screw holes 307 are uniformly formed in the end surface of the fourth boss 306 along the circumferential direction, and the screws 22 are screwed in the first screw holes 307.

As shown in fig. 9 to 11, the chuck body 4 is formed by coaxially connecting a fifth boss 401, a third body 402 and a sixth boss 405, and the fifth boss 401, the third body 402 and the sixth boss 405 are all cylindrical symmetrical structures; the sixth boss 405 and the fifth boss 401 are respectively disposed at the left and right ends of the third body 402, four second screw holes 407 are uniformly formed in the end surface of the fifth boss 401 along the circumferential direction, and the screws 22 are screwed into the second screw holes 407; four I-shaped third grooves 404 are uniformly formed in the side surface of the third main body 402 along the circumferential direction, and the movable claws 13 are arranged in the third grooves 404 in a penetrating manner; four cylindrical third through holes 403 are further uniformly formed in the side surface of the third main body 402 along the circumferential direction, and the bevel pinion 14 penetrates through the third through holes 403; a cylindrical fourth groove 406 is formed in the end surface of the third body 402, and the bevel gear 21 penetrates through the fourth groove 406; the sixth boss 405 is located in the fourth recess 406, and the second screw hole 407 also penetrates through the sixth boss 405.

As shown in fig. 12, the bottom plate 5 is a rectangular plate-shaped symmetrical structure; four cylindrical fourth through holes 503 are symmetrically formed in the bottom plate 5, the first screw a10 penetrates through the fourth through holes 503, and the first nut a11 is screwed at one end of the first screw a 10; two rectangular fifth grooves 501 are symmetrically formed in the upper surface of the bottom plate 5, and the first wheels a15 are arranged in the fifth grooves 501; two rectangular parallelepiped sixth grooves 502 are symmetrically formed in the upper surface of the bottom plate 5, and the second wheels b15 are disposed in the sixth grooves 502.

As shown in fig. 13 to 15, the second bracket 8 is formed by connecting a fourth main body 803 and two seventh bosses 802; the fourth body 803 and the seventh bosses 802 are both rectangular parallelepiped symmetrical structures, and the two seventh bosses 802 are symmetrically arranged on the lower surface of the fourth body 803; each seventh boss 802 is provided with a cuboid-shaped third through groove 804, and the second wheel b15 penetrates through the third through groove 804; two cylindrical fifth through holes 801 are formed in two sides of each third through groove 804, and the second hinge b7 penetrates through each fifth through hole 801; the fourth body 803 is symmetrically provided with four cylindrical sixth through holes 805, the first screw a10 is inserted into the sixth through holes 805, and the first nut a11 is screwed on one end of the first screw a 10.

As shown in fig. 16 and 17, the support plate 9 is formed by connecting a fifth main body 901 and an eighth boss 903; the fifth main body 901 and the eighth boss 903 are both rectangular plate-shaped symmetrical structures, and the eighth boss 903 is vertically arranged on the upper surface of the fifth main body 901; four cylindrical seventh through holes 904 are symmetrically formed in the fifth main body 901, the first screw a10 penetrates through the seventh through holes 904, and one end of the first screw a10 is screwed with the first nut a 11; the eighth boss 903 is symmetrically provided with two rectangular seventh grooves 902, and the third wheel c15 is disposed in the seventh grooves 902.

As shown in fig. 18 and 19, the bearing support 12 is formed by connecting a sixth main body 1201 and a ninth boss 1202; the sixth body 1201 and the ninth bosses 1202 are both of a rectangular parallelepiped symmetrical structure, and the ninth bosses 1202 are disposed on the upper surface of the sixth body 1201; the ninth boss 1202 is provided with an eighth cylindrical groove 1204, and the first rolling bearing a16 is mounted in the eighth groove 1204; an eighth cylindrical through hole 1203 is formed in the axial position of the eighth groove 1204, and a bearing section 303 of the chuck head 3 penetrates through the eighth through hole 1203; four cylindrical ninth through holes 1205 are symmetrically formed in the sixth body 1201, the first screw a10 penetrates through the ninth through holes 1205, and the first nut a11 is screwed to one end of the first screw a 10.

As shown in fig. 20, the movable jaw 13 is formed by connecting a plurality of racks 1303, a seventh body 1302 and a tenth boss 1304, where the seventh body 1302 and the tenth boss 1304 are both rectangular parallelepiped symmetrical structures; the tenth boss 1304 is arranged at the right end of the seventh main body 1302 and is used for clamping the steel pipe 6 to be polished; a rectangular fourth through groove 1301 is formed in each of the front side and the rear side of the seventh main body 1302, so that an i-shaped symmetrical structure is formed and is used for clamping the movable clamping jaws 13; the plurality of racks 1303 are uniformly disposed at the left end of the seventh body 1302, and are used for engaging the planar threads 2104 of the bevel gear 21.

As shown in fig. 21 and 22, the bevel pinion 14 is composed of an eighth body 1403, a plurality of first conical teeth 1402 and an insertion section 1401 which are coaxially connected, and the eighth body 1403 and the insertion section 1401 are both of a cylindrical symmetrical structure; a ninth cuboid groove 1405 is formed in the end face of the eighth main body 1403 along the axial direction, an annular groove 1404 is formed in the side face of the eighth main body 1403 along the circumferential direction, and a third boss 302 of the chuck head 3 penetrates through the annular groove 1404; the first conical teeth 1402 are uniformly arranged along the circumferential direction, and the insertion section 1401 is used for penetrating through the second groove 301 of the chuck head 3, so as to axially position the small bevel gear 14 penetrating through the third through hole 403.

As shown in fig. 29 to 31, the bevel bull gear 21 is composed of a plurality of second tapered teeth 2103, a ninth main body 2102 and a set of flat threads 2104 connected together, which are coaxially connected; the ninth main body 2102 is a cylindrical symmetrical structure, a cylindrical fourteenth through hole 2101 is formed in the ninth main body 2102 along the axial direction, and a fourth boss 306 of the chuck head 3 penetrates through the fourteenth through hole 2101; a plurality of the second tapered teeth 2103 are uniformly arranged at the left end of the ninth main body 2102 in the circumferential direction, and are used for engaging with the first tapered teeth 1402 of the bevel pinion 14; the flat screw 2104 is provided at the right end of the ninth main body 2102 for engaging the rack 1303 of the movable jaw 13.

As shown in fig. 23, the roll 17 is formed by connecting roll heads 1701 at two ends and a roll body 1702 in the middle, wherein the roll heads 1701 and the roll body 1702 are both in a cylindrical symmetrical structure; the roller head 1701 is used for passing through the second rolling bearing b16, and the roller body 1702 is used for conveying the abrasive belt 20.

As shown in fig. 24 to 26, the bearing support plate 18 has a rectangular parallelepiped plate-shaped symmetrical structure; a cuboid-shaped fifth through groove 1801 is respectively formed at the front end and the rear end of the bearing support plate 18, and the third wheel c15 penetrates through the fifth through groove 1801; two cylindrical tenth through holes 1802 are formed in two sides of each fifth through groove 1801, and the third hinges c7 penetrate through the tenth through holes 1802; the bearing support plate 18 is symmetrically provided with four cylindrical tenth grooves 1805, and the second rolling bearings b16 are mounted in the tenth grooves 1805; an eleventh cylindrical through hole 1803 is formed in each of the tenth grooves 1805 at an axial position, and a roller head 1701 of the roller 17 penetrates through the eleventh through hole 1803; the bearing support plate 18 is further symmetrically provided with four cylindrical twelfth through holes 1804, the second screw b10 penetrates through the twelfth through holes 1804, and one end of the second screw b10 is screwed with the second nut b 11.

Referring to fig. 32, the base plate 1 has a symmetric structure of a rectangular parallelepiped plate shape, and is configured to maintain the bottom plate 5 in a horizontal state.

As shown in fig. 27 and 28, the spacer 19 has a rectangular parallelepiped symmetrical structure, two thirteenth through holes 1901 having a cylindrical shape are symmetrically formed in the spacer 19, the second screw b10 is inserted into the thirteenth through hole 1901, and one end of the second screw b10 is screwed with the second nut b 11.

Referring to fig. 27 and 33, the abrasive belt 20 is an annular belt-shaped structure, and one surface of the abrasive belt 20 is provided with an abrasive material for grinding the outer surface of the steel pipe 6; the other side of belt 20 is connected to the body 1702 of roll 17 for power transmission.

The utility model provides an assembly process of device of coping steel pipe surface:

as shown in fig. 1 to 33, first, one first rolling bearing a16 is installed in the first groove 207 of the first bracket 2, then two first wheels a15 are respectively installed in the two first through grooves 205 of the first bracket 2, so that the axle center holes of the four first wheels a15 are aligned with the four first through holes 201 of the first bracket 2, and then one first hinge a7 is installed in each of the four aligned through holes, so that one first rolling bearing a16, the first bracket 2 and the four first wheels a15 can be assembled into a first bracket vehicle;

then, two second wheels b15 are respectively arranged in the two third through grooves 804 of the second support 8 in a penetrating manner, so that the axle center holes of the four second wheels b15 are ensured to be aligned with the four fifth through holes 801 of the second support 8, and then one second hinge b7 is respectively arranged in the through holes in the four pairs, so that the second support 8 and the four second wheels b15 can be assembled into a second support vehicle;

then, one second rolling bearing b16 is respectively installed in eight tenth grooves 1805 of two bearing support plates 18, then four roller heads 1701 at one ends of four rollers 17 are respectively arranged in four second rolling bearings b16, then the abrasive belt 20 is sleeved on four roller bodies 1702 of four rollers 17, then four roller heads 1701 at the other ends of four rollers 17 are respectively arranged in the other four second rolling bearings b16, then two cushion blocks 19 are arranged between the two bearing support plates 18, four thirteenth through holes 1901 of the two cushion blocks 19 are ensured to be aligned with eight twelfth through holes 1804 of the two bearing support plates 18, then one second screw rod b10 is respectively arranged in the through holes in the four pairs, and then one second nut b11 is screwed on the other end of each of the four second screw rods b10, in this way, the two bearing brackets 18, the eight second rolling bearings b16, the four rollers 17, the abrasive belt 20, and the two pads 19 can be assembled;

then, two third wheels c15 are respectively arranged in the four fifth through grooves 1801 of the two bearing support plates 18 in a penetrating manner, so that the axle center holes of the eight third wheels c15 are ensured to be aligned with the eight tenth through holes 1802 of the two bearing support plates 18, and then one third hinge c7 is respectively arranged in the eight groups of aligned through holes, so that the two bearing support plates 18 and the eight third wheels c15 can be assembled into a bearing support plate vehicle;

then, the fifth groove 501 of the bottom plate 5 is opened upwards and arranged on an installation table, then one first rolling bearing a16 is arranged in the eighth groove 1204 of the bearing support 12, then the bearing support 12 is arranged on the bottom plate 5, four ninth through holes 1205 of the bearing support 12 are aligned with four fourth through holes 503 of the bottom plate 5, then one first screw a10 is respectively arranged in the through holes in the four pairs, and then one first nut a11 is respectively screwed on the other ends of the four first screws a10, so that one first rolling bearing a16, the bearing support 12 and the bottom plate 5 can be assembled;

then the fourth grooves 406 of the two chuck bodies 4 are arranged on the mounting table with the openings facing upwards, then the two sets of plane threads 2104 of the two bevel bull gears 21 are arranged downwards in the two fourth grooves 406 of the two chuck bodies 4, then the two fourth bosses 306 of the two chuck heads 3 are arranged downwards in the two fourth grooves 406 of the two chuck bodies 4, the eight third through holes 403 of the two chuck bodies 4 are ensured to be aligned with the eight second grooves 301 of the two chuck heads 3, then the small bevel gears 14 are respectively arranged in the through holes in the eight sets of pairs in a penetrating manner, the eight insertion sections 1401 of the eight small bevel gears 14 are ensured to be arranged in the eight second grooves 301 of the two chuck heads 3, then the two chuck heads 3 are slowly pushed downwards, the eight third bosses 302 of the two chuck heads 3 are ensured to be arranged in the eight annular grooves 1404 of the eight small bevel gears 14, then, one screw 22 is screwed into each of eight second screw holes 407 of two chuck bodies 4, one movable jaw 13 is inserted into each of eight third grooves 404 of the two chuck bodies 4, and then the two bevel pinions 14 located in the two chuck bodies 4 are rotated to engage the racks 1303 of the eight movable jaws 13 with the two sets of planar threads 2104 of the two bevel pinions 21, so that the two chuck heads 3, the two bevel pinions 21, the eight movable jaws 13, the eight bevel pinions 14, and the two chuck bodies 4 can be assembled into two sets of self-centering four-jaw chucks;

then, two bearing segments 303 of two chuck heads 3 are respectively arranged in two first rolling bearings a16 in a penetrating manner, then two support plates 9 are arranged on the second carriage vehicle, eight seventh through holes 904 of the two support plates 9 are ensured to be aligned with eight sixth through holes 805 of the second carriage 8, then one first screw a10 is respectively arranged in the through holes of eight pairs in a penetrating manner, then one first nut a11 is respectively screwed on the other ends of the eight first screws a10, then four first wheels a15 mounted on the first carriage vehicle are rolled into two fifth grooves 501 of the bottom plate 5, then four second wheels b15 mounted on the second carriage vehicle are rolled into two sixth grooves 502 of the bottom plate 5, and finally eight third wheels c15 mounted on the two support plates vehicle are rolled into four seventh grooves 902 of the support plates 9, thus, the whole device is assembled and can be put into use.

The utility model provides a working principle of device of coping steel pipe surface:

as shown in fig. 31, the combined use of the third boss 302 and the second groove 301 of the chuck head 3 can prevent the bevel pinion 14 from moving in the radial direction; the third through hole 403 of the chuck body 4 can prevent the small bevel gear 14 from swinging, so as to limit the degree of freedom of the small bevel gear 14 to one, namely, the small bevel gear 14 can only rotate along the axis thereof; since the four bevel pinion gears 14 are respectively meshed with the bevel pinion gear 21, as long as any one of the bevel pinion gears 14 is rotated, the bevel pinion gear 21 and the other three bevel pinion gears 14 can be linked at the same time, so that the four movable claws 13 arranged in the third grooves 404 of the chuck body 4 can be linked at the same time, and the automatic centering of the four movable claws 13 is realized;

as shown in fig. 33, since the bearing support plate vehicle is located above the steel pipe 6, the gravity of the bearing support plate vehicle can ensure that the abrasive belt 20 sleeved on the four rollers 17 can be automatically tensioned, that is, the surface of the abrasive belt 20 bonded with the abrasive material can be in close contact with the outer surface of the steel pipe 6, and according to the principle of relative movement, as long as the steel pipe 6 is rotated, the abrasive belt 20 can better fit the outer surface of the steel pipe 6, so that the outer surface of the steel pipe 6 can be safely and efficiently polished.

The utility model provides a use of device of coping steel pipe surface:

as shown in fig. 1 to 3, firstly, the assembled device for grinding steel pipes on the basis of the outer surface of the present invention is disposed on the ground, and then the two bevel pinions 14 disposed on the two chuck bodies 4 are rotated respectively, so as to achieve mutual approaching of the eight movable claws 13 disposed on the two chuck bodies 4, and then the first carriage is pulled rightwards along the two fifth grooves 501 of the bottom plate 5 by a certain distance, where the certain distance is that the steel pipe 6 can be accommodated between the two chuck bodies 4, and then the bearing carriage is pulled upwards by a certain distance along the four seventh grooves 902 of the two support plates 9, where the certain distance is that the abrasive belt 20 can be disposed above the steel pipe 6;

then, the steel pipe 6 is lifted between the two chuck bodies 4, the axis of the steel pipe 6 is ensured to be aligned with the axes of the two chuck bodies 4, then the first support vehicle is pushed leftwards along the two fifth grooves 501 of the bottom plate 5, so that the left end and the right end of the steel pipe 6 can be sleeved on the eight movable clamping jaws 13 on the two chuck bodies 4, then the two bevel pinions 14 on the two chuck bodies 4 are rotated simultaneously, the eight movable clamping jaws 13 are separated from each other, and the steel pipe 6 can be positioned and clamped;

then, slowly descending the bearing support plate vehicle along the four seventh grooves 902 of the two support plates 9, finally stopping the abrasive belt 20 sleeved on the roller 17 on the outer surface of the steel pipe 6, so as to realize the automatic tensioning of the abrasive belt 20, then slowly rotating the two chuck heads 3 simultaneously and in the same direction, so as to drive the steel pipe 6 to slowly rotate simultaneously, wherein the outer surface of the steel pipe 6 is continuously polished by the abrasive belt 20 in the process, and when the outer surface of the steel pipe 6 reaches the expected polishing degree, stopping rotating the two chuck heads 3;

then the bearing support plate trolley is pulled upwards along the four seventh grooves 902 of the two support plates 9, then the second support plate trolley is pulled rightwards to a new position along the two sixth grooves 502 of the bottom plate 5, then the bearing support plate trolley is slowly dropped onto the outer surface of the steel pipe 6 along the four seventh grooves 902 of the two support plates 9, so that the automatic tensioning of the abrasive belt 20 is realized again, then the two chuck heads 3 are slowly rotated in the same direction at the same time, the steel pipe 6 is driven to slowly rotate again, and therefore the abrasive belt 20 can grind the outer surface of the steel pipe 6 at the new position.

Supplementary explanation: the device for grinding the steel pipe based on the outer surface provided by the utility model is designed by adopting a symmetrical structure, so that the abrasive belt 20 is installed conveniently, the abrasive belt 20 which is relatively long is adopted, and the automatic tensioning of the abrasive belt 20 is realized by the gravity action of the bearing support plate vehicle; in order to improve the grinding accuracy, the self-centering accuracy of the four movable jaws 13 should be measured in advance, and if necessary, the four movable jaws 13 may be corrected by turning.

Through the utility model provides a device of coping steel pipe surface can be fast and the efficient carries out the coping to the surface of steel pipe, the utility model discloses the device has low in manufacturing cost, easy operation, the effectual characteristics of coping.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. The device for grinding the outer surface of the steel pipe is characterized by comprising a first support (2), two chuck heads (3), two chuck bodies (4), a bottom plate (5), a second support (8), two support plates (9), a bearing support (12), eight movable clamping jaws (13), eight small bevel gears (14), two large bevel gears (21), four rollers (17), two bearing support plates (18), a base plate (1), two cushion blocks (19), an abrasive belt (20), four first wheels (a15), four second wheels (b15), eight third wheels (c15), four first hinges (a7), four second hinges (b7), eight third hinges (c7), two first rolling bearings (a16), eight second rolling bearings (b16), twelve first screws (a10), Four second screws (b10), twelve first nuts (a11), four second nuts (b11) and eight screws (22); wherein:

the first bracket (2) is formed by connecting a first main body (202), a first boss (203) and two second bosses (204), and the first main body (202), the first boss (203) and the second bosses (204) are all of rectangular symmetrical structures; the first boss (203) is arranged on the upper surface of the first main body (202), a cylindrical first groove (207) is formed in the first boss (203), and the first rolling bearing (a16) is mounted in the first groove (207); a cylindrical second through hole (206) is formed in the axis position of the first groove (207), and a bearing section (303) of the chuck head (3) penetrates through the second through hole (206); the two second bosses (204) are symmetrically arranged on the lower surface of the first main body (202), each second boss (204) is provided with a first through groove (205) in a rectangular shape, and the first wheel (a15) penetrates through the first through groove (205); two cylindrical first through holes (201) are formed in two sides of each first through groove (205), and a first hinge (a7) penetrates through each first through hole (201);

the chuck head (3) is formed by connecting a bearing section (303), a second main body (304), four third bosses (302) and a fourth boss (306), the bearing section (303), the second main body (304) and the fourth boss (306) are coaxially connected and have cylindrical symmetrical structures, and the third boss (302) is in a rectangular symmetrical structure; the bearing section (303) is arranged at the left end of the second main body (304) and is used for penetrating the first rolling bearing (a 16); the four third bosses (302) are arranged at the right end of the second main body (304) along the circumferential direction, each third boss (302) is provided with a second rectangular through groove (305), and an annular groove (1404) of the small bevel gear (14) is arranged in each second through groove (305) in a penetrating manner; the fourth boss (306) is arranged at the right end of the second main body (304) and is used for penetrating through a fourteenth through hole (2101) of the bevel gear (21); four second rectangular grooves (301) are uniformly formed in the side face of the fourth boss (306) along the circumferential direction, and an insertion section (1401) of the small bevel gear (14) penetrates through the second grooves (301); the end surface of the fourth boss (306) is uniformly provided with four first screw holes (307) along the circumferential direction, and the screws (22) are screwed in the first screw holes (307);

the chuck body (4) is formed by connecting a fifth boss (401), a third main body (402) and a sixth boss (405) which are coaxially connected, and the fifth boss (401), the third main body (402) and the sixth boss (405) are all in cylindrical symmetrical structures; the sixth boss (405) and the fifth boss (401) are respectively arranged at the left end and the right end of the third main body (402), four second screw holes (407) are uniformly formed in the end face of the fifth boss (401) along the circumferential direction, and the screws (22) are screwed in the second screw holes (407); four I-shaped third grooves (404) are uniformly formed in the side face of the third main body (402) along the circumferential direction, and the movable clamping jaws (13) penetrate through the third grooves (404); four cylindrical third through holes (403) are uniformly formed in the side surface of the third main body (402) along the circumferential direction, and the small bevel gear (14) penetrates through the third through holes (403); the end surface of the third main body (402) is provided with a cylindrical fourth groove (406), and the bevel gear (21) penetrates through the fourth groove (406); the sixth boss (405) is positioned in the fourth groove (406), and the second screw hole (407) also penetrates through the sixth boss (405);

the bottom plate (5) is of a cuboid plate-shaped symmetrical structure; four cylindrical fourth through holes (503) are symmetrically formed in the bottom plate (5), the first screw (a10) penetrates through the fourth through holes (503), and one end of the first screw (a10) is screwed with the first nut (a 11); two cuboid-shaped fifth grooves (501) are symmetrically formed in the upper surface of the bottom plate (5), and the first wheels (a15) are arranged in the fifth grooves (501); the upper surface of the bottom plate (5) is also symmetrically provided with two cuboid-shaped sixth grooves (502), and the second wheels (b15) are arranged in the sixth grooves (502);

the second bracket (8) is formed by connecting a fourth main body (803) and two seventh bosses (802); the fourth main body (803) and the seventh bosses (802) are both rectangular parallelepiped symmetrical structures, and the two seventh bosses (802) are symmetrically arranged on the lower surface of the fourth main body (803); each seventh boss (802) is provided with a third through groove (804) in a cuboid shape, and the second wheel (b15) penetrates through the third through groove (804); two cylindrical fifth through holes (801) are formed in two sides of each third through groove (804), and a second hinge (b7) penetrates through each fifth through hole (801); the fourth main body (803) is symmetrically provided with four cylindrical sixth through holes (805), the first screw (a10) penetrates through the sixth through holes (805), and one end of the first screw (a10) is screwed with the first nut (a 11);

the support plate (9) is formed by connecting a fifth main body (901) and an eighth boss (903); the fifth main body (901) and the eighth boss (903) are both rectangular plate-shaped symmetrical structures, and the eighth boss (903) is vertically arranged on the upper surface of the fifth main body (901); the fifth main body (901) is symmetrically provided with four cylindrical seventh through holes (904), the first screw (a10) penetrates through the seventh through holes (904), and one end of the first screw (a10) is screwed with the first nut (a 11); the eighth boss (903) is symmetrically provided with two cuboid-shaped seventh grooves (902), and the third wheel (c15) is arranged in the seventh grooves (902);

the bearing support (12) is formed by connecting a sixth main body (1201) and a ninth boss (1202); the sixth main body (1201) and the ninth boss (1202) are both of a cuboid-shaped symmetrical structure, and the ninth boss (1202) is arranged on the upper surface of the sixth main body (1201); the ninth boss (1202) is provided with an eighth cylindrical groove (1204), and the first rolling bearing (a16) is mounted in the eighth groove (1204); an eighth cylindrical through hole (1203) is formed in the axial line position of the eighth groove (1204), and a bearing section (303) of the chuck head (3) penetrates through the eighth through hole (1203); the sixth body (1201) is symmetrically provided with four cylindrical ninth through holes (1205), the first screw (a10) penetrates through the ninth through holes (1205), and one end of the first screw (a10) is screwed with the first nut (a 11);

the movable jaw (13) is formed by connecting a plurality of racks (1303), a seventh main body (1302) and a tenth boss (1304), and the seventh main body (1302) and the tenth boss (1304) are of rectangular symmetrical structures; the tenth boss (1304) is arranged at the right end of the seventh main body (1302) and used for clamping a steel pipe to be polished; the front side and the rear side of the seventh main body (1302) are respectively provided with a rectangular fourth through groove (1301) for clamping the movable clamping jaw (13); a plurality of the racks (1303) are uniformly arranged at the left end of the seventh main body (1302) and are used for engaging the plane thread (2104) of the bevel gear (21);

the small bevel gear (14) is formed by connecting an eighth main body (1403), a plurality of first conical teeth (1402) and an insertion section (1401) which are coaxially connected, and the eighth main body (1403) and the insertion section (1401) are both of cylindrical symmetrical structures; a cuboid-shaped ninth groove (1405) is formed in the end face of the eighth main body (1403) along the axis direction, an annular groove (1404) is formed in the side face of the eighth main body (1403) along the circumferential direction, and a third boss (302) of the chuck head (3) penetrates through the annular groove (1404); the first conical teeth (1402) are uniformly arranged along the circumferential direction, and the insertion section (1401) is used for penetrating through a second groove (301) of the chuck head (3) so as to axially position the small bevel gear (14) penetrating into the third through hole (403);

the big bevel gear (21) is formed by connecting a plurality of second conical teeth (2103), a ninth main body (2102) and a group of plane threads (2104) which are coaxially connected; the ninth main body (2102) is of a cylindrical symmetrical structure, a cylindrical fourteenth through hole (2101) is formed in the ninth main body (2102) along the axis direction, and a fourth boss (306) of the chuck head (3) penetrates through the fourteenth through hole (2101); a plurality of second tapered teeth (2103) are uniformly arranged at the left end of the ninth main body (2102) along the circumferential direction and are used for engaging with the first tapered teeth (1402) of the small bevel gear (14); the plane thread (2104) is provided at the right end of the ninth main body (2102) for engaging the rack (1303) of the movable jaw (13);

the roller (17) is formed by connecting roller heads (1701) at two ends and a roller body (1702) in the middle, and the roller heads (1701) and the roller body (1702) are of cylindrical symmetrical structures; the roller head (1701) is used for penetrating the second rolling bearing (b16), and the roller body (1702) is used for conveying the abrasive belt (20);

the bearing support plate (18) is of a cuboid plate-shaped symmetrical structure; a cuboid fifth through groove (1801) is respectively formed at the front end and the rear end of the bearing support plate (18), and the third wheel (c15) penetrates through the fifth through groove (1801); two cylindrical tenth through holes (1802) are formed in two sides of each fifth through groove (1801), and third hinges (c7) penetrate through the tenth through holes (1802); the bearing support plate (18) is symmetrically provided with four cylindrical tenth grooves (1805), and the second rolling bearing (b16) is mounted in the tenth grooves (1805); an eleventh cylindrical through hole (1803) is formed in the axial position of each tenth groove (1805), and a roller head (1701) of the roller (17) penetrates through the eleventh through hole (1803); the bearing support plate (18) is further symmetrically provided with four cylindrical twelfth through holes (1804), the second screw rod (b10) penetrates through the twelfth through holes (1804), and one end of the second screw rod (b10) is screwed with the second nut (b 11);

the base plate (1) is of a cuboid plate-shaped symmetrical structure and is used for keeping the bottom plate (5) in a horizontal state;

the cushion block (19) is of a cuboid-shaped symmetrical structure, two cylindrical thirteenth through holes (1901) are symmetrically formed in the cushion block (19), the second screw (b10) penetrates through the thirteenth through holes (1901), and one end of the second screw (b10) is screwed with the second nut (b 11);

the abrasive belt (20) is of an annular belt-shaped structure, and one surface of the abrasive belt is provided with abrasive materials for grinding the outer surface of the steel pipe; the other side of the abrasive belt is connected with a roller body (1702) of the roller (17) and is used for transmitting power;

the first rolling bearing (a16), the second rolling bearing (b16), the first wheel (a15), the second wheel (b15), the third wheel (c15), the first hinge (a7), the second hinge (b7), the third hinge (c7), the first screw rod (a10), the second screw rod (b10), the first nut (a11), the second nut (b11) and the screw (22) are all standard parts.

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