阅读说明：本技术 一种涂塑复合钢管表面热浸涂塑处理系统 (Plastic-coated composite steel pipe surface hot-dip plastic-coated treatment system ) 是由 张尚勇 徐卫玲 于 2021-01-08 设计创作，主要内容包括：本发明涉及一种涂塑复合钢管表面热浸涂塑处理系统,包括底板、涂料盒、固定装置和驱动装置,所述底板上安装有涂料盒,涂料盒上方安装有固定装置,涂料盒右侧设置有驱动装置,本发明可以解决在热浸后钢管取出过程后,常常会出现涂料瘤,就是常见的向蜡烛泪一样的涂料痕迹,涂料瘤影响了钢管的美观,同样一定程度上影响了钢管的性能的问题,还可以解决常见的钢管热浸通常是把钢管放置到涂料中浸透,放置一端时间后捞上来,这样的工艺使得钢管可能有热浸不充分的部位,同时热浸的时间较长,影响了涂塑钢管整体的制造效率的问题。(The invention relates to a hot dipping plastic coating treatment system for the surface of a plastic coated composite steel pipe, which comprises a base plate, a coating box, a fixing device and a driving device, wherein the coating box is arranged on the base plate, the fixing device is arranged above the coating box, and the driving device is arranged on the right side of the coating box.)

1. The utility model provides a compound steel pipe surface hot dipping plastic-coated processing system of moulding, includes bottom plate (1), scribbles paint cartridge (2), fixing device (3) and drive arrangement (4), its characterized in that: install on bottom plate (1) coating cartridge (2), fixing device (3) are installed to coating cartridge (2) top, and coating cartridge (2) right side is provided with drive arrangement (4), wherein:

the fixing device (3) comprises a sliding block (31), a connecting frame (32), an electric sliding block (33), a horizontal plate (34), a mounting plate (35), a limiting column (36), a screw rod (37), a rotating mechanism (38), a moving plate (39) and a locking mechanism (391), wherein the left side and the right side of the rear side of the upper end of the bottom plate (1) are provided with moving grooves (311), the sliding block (31) is in sliding butt joint in the moving grooves (311), the connecting frame (32) is installed on the sliding block (31), the front end of the connecting frame (32) is provided with a guide rail, the electric sliding block (33) is arranged on the guide rail, the front end of the electric sliding block (33) is provided with the horizontal plate (34), a plurality of groups of mounting plates (35) are sequentially installed at the front end and the rear end of the left end and the right end of the horizontal plate (34), the limiting column (36, the thread directions of the left end and the right end of the lead screw (37) are opposite, the left side and the right side of the lead screw (37) are symmetrically in threaded connection with a movable plate (39), the limiting column (36) penetrates through the movable plate (39) in a sliding mode, and a locking mechanism (391) is arranged between the corresponding movable plates (39);

the coating material box (2) is characterized in that the driving device (4) comprises an air cylinder plate (41), a stretching air cylinder (42), a rotating column (43), a rotating chain wheel (44), a second chain (45), a vertical plate (46) and a second motor (47), the air cylinder plate (41) is installed at the left end of the moving groove (311), the stretching air cylinder (42) is installed at the right end of the air cylinder plate (41), the ejection end of the stretching air cylinder (42) is connected with a sliding block (31), a plurality of groups of rotating columns (43) are sequentially and rotationally connected with the upper side of the right end of the coating material box (2) in a front-back mode, a plurality of groups of rotating columns (43) are symmetrically arranged on the right side of the lower end of the coating material box (2), a clamping groove (431) is formed in the left end of the rotating column (43), the rotating chain wheel (44) is fixedly arranged at the right end of the rotating column (43, a vertical plate (46) is installed on the right side of the upper end of the bottom plate (1), a second motor (47) is installed on the left end of the vertical plate (46) in an up-down symmetrical mode, the second motor (47) is just right of a rotating chain wheel (44) on the last side, and output shafts of the second motor (47) are connected with the corresponding rotating chain wheels (44) respectively.

2. The system for hot dip coating plastic on the surface of the plastic-coated composite steel pipe according to claim 1, wherein: slewing mechanism (38) are including driven sprocket (381), L shape motor board (382), a motor (383), drive sprocket (384) and chain (385), the fixed cover of right-hand member of lead screw (37) is equipped with driven sprocket (381), L shape motor board (382) are installed to mounting panel (35) upper end, a motor (383) is installed through the motor cabinet to the left end of L shape motor board (382), the output shaft of a motor (383) is connected with drive sprocket (384), drive sprocket (384) are connected with driven sprocket (381) through chain (385), driven sprocket (381) and drive sprocket (384) all mesh with a chain (385).

3. The system for hot dip coating plastic on the surface of the plastic-coated composite steel pipe according to claim 1, wherein: the locking mechanism (391) comprises a connecting block (392), a clamping block (393), a cylinder (394), a pressure spring (395), a pair of pressing blocks (396), a top extension plate (397), a reset spring (398) and a spring plate (399), wherein the connecting block (392) is sleeved on the moving plate (39) in a rotating mode, the clamping block (393) is connected to the right end of the right connecting block (392), the clamping block (393) is matched with the clamping groove, one side, close to the moving plate (39), of the connecting block (392) is of a cylinder structure, one side, close to each other, of the connecting block (392) is of a circular truncated cone structure, a heat-resistant rubber ring is arranged on the surface of the circular truncated cone structure, the cylinder (394) is installed at one end, close to each other, of the connecting block (392), circular grooves are symmetrically formed in the cylinder (394), the bottom ends of the circular grooves are connected with the pair of, keep away from each other one end to briquetting (396) and be the round platform structure, the round platform structure is to being close to each other direction diameter crescent, and the top stretch hole has been seted up along circumference to cylinder (394) outer end, and the downthehole slip of top stretch is docked has top to stretch board (397), and spring plate (399) are installed in one side of keeping away from briquetting (396) to the one end that top stretch board (397) are close to cylinder (394) axle center, and spring plate (399) are connected with cylinder (394) inner wall through reset spring (398).

4. The system for hot dip coating plastic on the surface of a plastic-coated composite steel pipe according to claim 3, wherein: the outer end of the jacking plate (397) is connected with a pressing block (3972) through a connecting spring (3971), one end, far away from the cylinder (394), of the pressing block (3972) is an arc-shaped mechanism matched with the steel pipe, and multiple groups of protruding rubber blocks are uniformly arranged on the surface of the pressing block.

5. The system for hot dip coating plastic on the surface of the plastic-coated composite steel pipe according to claim 1, wherein: the front side of the paint box (2) is provided with a feed inlet, and the feed inlet is in threaded connection with a sealing plug (21).

6. The system for hot dip coating plastic on the surface of a plastic-coated composite steel pipe according to claim 3, wherein: an annular groove is formed in the connecting block (392), a groove matched with the connecting block (392) is formed in the moving plate (39), and the connecting block (392) is rotatably connected to the moving plate (39).

7. The system for hot dip coating plastic on the surface of the plastic-coated composite steel pipe according to claim 1, wherein: pulling groove (321) have been seted up to bilateral symmetry on link (32), and pulling groove (321) tank bottom is connected with locating plate (323) through pulling spring (322), and locating plate (323) are L shape structure, and locating plate (323) are close to one end each other and are connected with pulling rope (324), and pulling rope (324) pass link (32) and are connected with stopper (325), and link (32) rear end is opened from top to bottom and is equipped with two sets of and stopper (325) complex spacing groove (326).

8. The system for hot dip coating plastic on the surface of the plastic-coated composite steel pipe according to claim 1, wherein: the lower end of the moving plate (39) is provided with a ball, and the ball is contacted with the bottom of the paint box (2).

Technical Field

The invention relates to the field of plastic-coated steel pipe processing, in particular to a hot-dip plastic-coated treatment system for the surface of a plastic-coated composite steel pipe.

Background

The plastic-coated steel pipe, also known as plastic-coated pipe, steel-plastic composite pipe, plastic-coated composite steel pipe, plastic-coated steel pipe has fine corrosion resistance and smaller frictional resistance, plastic-coated steel pipe manufacturing means that the steel pipe is the base body, through spraying, brushing, rolling, soaking, inhale the technology at the steel pipe bottom tube internal surface weld one deck plastics anticorrosive coating or the steel-plastic composite steel pipe of interior surface weld plastics anticorrosive coating, the steel pipe after the processing has corrosion resistance and cold resistance for the steel pipe can not take place to destroy along with the environment, but when hot dipping the steel pipe, because the not enough of existing equipment, the following problem often can appear:

1. after the steel pipe is taken out after hot dipping, paint lumps which are common paint traces like tears on the candle often appear, influence the attractiveness of the steel pipe and influence the performance of the steel pipe to a certain extent;

2. the common steel pipe is usually soaked in a coating by hot dipping, and the steel pipe is fished up after being placed for a period of time, so that the steel pipe can be hot dipped at an insufficient part by the process, and meanwhile, the hot dipping time is longer, and the integral manufacturing efficiency of the plastic-coated steel pipe is influenced.

Disclosure of Invention

In order to make up the defects of the prior art, the invention provides a plastic-coated composite steel pipe surface hot-dip plastic-coating processing system, which comprises a bottom plate, a coating box, a fixing device and a driving device, wherein the coating box is installed on the bottom plate, the fixing device is installed above the coating box, and the driving device is arranged on the right side of the coating box, wherein:

the fixing device comprises a sliding block, a connecting frame, an electric sliding block, a horizontal plate, mounting plates, limiting columns, a lead screw, a rotating mechanism, a moving plate and a locking mechanism, wherein moving grooves are formed in the left side and the right side of the rear side of the upper end of the bottom plate, the sliding block is in sliding butt joint with the sliding block in the moving grooves, the connecting frame is mounted on the sliding block, a guide rail is arranged at the front end of the connecting frame, the electric sliding block is arranged on the guide rail, the horizontal plate is mounted at the front end of the electric sliding block, a plurality of groups of mounting plates are sequentially mounted in the front and back of the left end and the right end of the horizontal plate, the limiting columns are fixedly connected between the mounting plates, the lead screw is rotatably connected between the mounting plates, the rotating; during specific work, the steel pipe is placed on the locking mechanism at one end, the moving plates can be driven to move towards the direction close to each other through the rotating mechanism to clamp the steel pipe tightly, the electric sliding blocks are started to drive the horizontal plate to move downwards, so that the moving plates are driven to move downwards, and the effect of driving the steel pipe to move downwards is finally achieved.

The coating box is characterized in that the driving device comprises an air cylinder plate, a stretching air cylinder, rotating columns, a rotating chain wheel, a second chain, a vertical plate and a second motor, the air cylinder plate is installed at the left end of the moving groove, the stretching air cylinder is installed at the right end of the air cylinder plate, the ejection end of the stretching air cylinder is connected with a sliding block, a plurality of groups of rotating columns are sequentially and rotatably connected from front to back on the upper side of the right end of the coating box, the plurality of groups of rotating columns are symmetrically arranged on the right side of the lower end of the coating box, clamping grooves are formed in the left end of the rotating columns, a rotating chain wheel is fixedly sleeved at the right end of each rotating column and connected through the second chain, the rotating chain wheel is meshed with the second chain, the vertical plate is installed on the right side of the upper end of the bottom plate, the second motor is vertically and; when the steel pipe automatic locking device works, when the electric sliding block slides to the lowest position, the steel pipe is immersed in the coating liquid, the stretching cylinder is started, the sliding block is pushed rightwards, the sliding block drives the connecting frame to move rightwards, finally, the locking mechanism is driven to move rightwards until the locking mechanism on the right side is connected and matched with the rotating column on the lower side, the second motor on the lower side is started, the rotating column on the lower side is driven to rotate under the linkage action of the rotating chain wheel and the second chain, so that the locking mechanism on the right side is driven to rotate, finally, the steel pipe is fully coated during rotation, the motor is turned off, the stretching cylinder is started to drive the sliding block to move leftwards, the locking mechanism is separated from the rotating column on the lower side, the locking mechanism is driven to move upwards through the electric sliding block until the locking mechanism, and the locking mechanism is connected and matched with the rotating column on the upper side, the second motor above the locking mechanism is started, and the rotating column above the locking mechanism is driven to rotate under the linkage action of the rotating chain wheel and the second chain above the locking mechanism, so that the locking mechanism is driven to rotate, and finally the steel pipe is rotated, and redundant coating on the surface of the steel pipe is thrown out in the rotating process.

As a preferred technical scheme of the invention, the rotating mechanism comprises a driven sprocket, an L-shaped motor plate, a first motor, a driving sprocket and a first chain, the right end of the screw rod is fixedly sleeved with the driven sprocket, the upper end of the mounting plate is provided with the L-shaped motor plate, the left end of the L-shaped motor plate is provided with the first motor through a motor base, the output shaft of the first motor is connected with the driving sprocket, the driving sprocket is connected with the driven sprocket through the first chain, and the driven sprocket and the driving sprocket are both meshed with the first chain; a motor commentaries on classics can drive driving sprocket and rotate, under the drive effect of a chain, finally drives driven sprocket and rotates, has finally played the effect that drives the lead screw pivoted.

As a preferred technical scheme of the invention, the locking mechanism comprises a connecting block, a clamping block, a cylinder, a compression spring, a counter-pressure block, a top extension plate, a return spring and a spring plate, the moving plate is rotatably sleeved with the connecting block, the right end of the right connecting block is connected with the clamping block, the clamping block is matched with the clamping groove, one side of the connecting block close to the moving plate is of a cylinder structure, one side of the connecting block close to each other is of a round platform structure, the surface of the round platform structure is provided with a heat-resistant rubber ring, the connecting block is provided with the cylinder towards one end close to each other, the cylinder is symmetrically provided with round grooves, the bottom ends of the round grooves are connected with the counter-pressure block through the compression spring, one end of the counter-pressure block close to each other is of a cylinder structure, one end of the counter-pressure block far away, a top extension plate is in sliding butt joint in the top extension hole, a spring plate is arranged at one end, close to the axis of the cylinder, of the top extension plate on one side far away from the counter pressing block, and the spring plate is connected with the inner wall of the cylinder through a return spring; when the movable plate moves towards directions close to each other, the clamping blocks can be finally driven to move oppositely to compress the steel pipes, the clamping blocks compress the steel pipes, the pressing blocks are mutually extruded to slide towards the bottoms of the corresponding circular grooves, and the top extension plate is driven to move outwards.

As a preferred technical scheme of the invention, the outer end of the top extension plate is connected with a pressing block through a pressing spring, one end of the pressing block, which is far away from the cylinder, is an arc-shaped mechanism matched with the steel pipe, and the surface of the pressing block is uniformly provided with a plurality of groups of protruding rubber blocks; the friction force between the top extension plate and the inner wall of the steel pipe is increased, and the fixing effect of the pressing block on the steel pipe is enhanced.

As a preferable technical scheme of the invention, a feed inlet is formed in the front side of the paint box, and a sealing plug is connected to the feed inlet in a threaded manner.

As a preferred technical scheme of the invention, the connecting block is provided with an annular groove, the moving plate is provided with a groove matched with the connecting block, and the connecting block is rotatably connected to the moving plate.

According to a preferred technical scheme, pulling grooves are symmetrically formed in the connecting frame left and right, the bottom of each pulling groove is connected with a positioning plate through a pulling spring, the positioning plate is of an L-shaped structure, one ends, close to each other, of the positioning plates are connected with pulling ropes, the pulling ropes penetrate through the connecting frame to be connected with limiting blocks, and two groups of limiting grooves matched with the limiting blocks are formed in the upper portion and the lower portion of the rear end of the connecting frame; pulling rope can drive locating plate relative motion, through the cooperation of stopper and spacing groove, thereby can fix the fixed positioning plate position of pulling rope position, the locating plate can spacing electronic slider, when electronic slider upper end and locating plate lower extreme are at same level, joint piece and upper end joint groove are at same level just.

In a preferred embodiment of the present invention, the moving plate has a ball disposed at a lower end thereof, the ball contacting the bottom of the paint cartridge, and the ball reduces friction between the moving plate and the bottom of the paint cartridge.

Compared with the prior art, the invention has the following advantages:

1. according to the invention, the steel pipe can be driven to rotate when entering the coating liquid through the arranged driving device, so that the steel pipe is quickly and sufficiently hot-dipped, and after the steel pipe is separated from the coating liquid, the driving device can also drive the steel pipe to rotate, so that the steel pipe is thrown out of the redundant coating staying on the surface, and the coating tumors are prevented from being formed on the surface of the steel pipe;

2. according to the invention, the clamping block arranged at the right end of the right clamping block is matched with the clamping groove at the left end of the rotating column, so that the rotating column can drive the clamping block to rotate and finally drive the steel pipe to rotate;

3. when the bottom end of the moving plate just contacts the bottom of the paint box, the clamping block and the clamping groove at the left end of the lower clamping column are just at the same level, so that the clamping block and the clamping groove of the lower rotating column are convenient to butt;

4. according to the invention, the position of the positioning plate is changed under the action of pulling the rope, so that the electric sliding block can be positioned, the clamping block and the clamping groove at the left end of the upper rotating column are just in the same level, and the clamping block and the clamping groove of the upper rotating column are convenient to butt.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of a first perspective of the present invention;

FIG. 2 is a perspective view of the present invention from a second perspective;

FIG. 3 is a perspective view of a third perspective of the present invention;

FIG. 4 is a cross-sectional view of the present invention;

FIG. 5 is an operational schematic of the locking mechanism of the present invention;

FIG. 6 is a schematic view of the connection of the positioning plate of the present invention;

FIG. 7 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;

FIG. 8 is an enlarged view of the invention at B in FIG. 1;

FIG. 9 is an enlarged view of the invention at C of FIG. 3;

fig. 10 is an enlarged view of the invention at D in fig. 5.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further explained with reference to fig. 1 to 10.

The utility model provides a compound steel pipe surface hot dipping plastic-coated processing system of scribbling moulds, includes bottom plate 1, scribbles cartridge 2, fixing device 3 and drive arrangement 4, install cartridge 2 on the bottom plate 1, scribble cartridge 2 front side and open and be equipped with the feed inlet, threaded connection has sealing plug 21 on the feed inlet, scribbles cartridge 2 top and installs fixing device 3, scribbles cartridge 2 right side and is provided with drive arrangement 4, wherein:

the fixing device 3 comprises a sliding block 31, a connecting frame 32, an electric sliding block 33, a horizontal plate 34, a mounting plate 35, a limiting column 36, a screw 37, a rotating mechanism 38, a moving plate 39 and a locking mechanism 391, wherein the left and right sides of the rear side of the upper end of the bottom plate 1 are provided with moving grooves 311, the sliding block 31 is in sliding butt joint in the moving grooves 311, the connecting frame 32 is installed on the sliding block 31, pulling grooves 321 are symmetrically arranged on the connecting frame 32 in the left and right direction, the bottoms of the pulling grooves 321 are connected with a positioning plate 323 through pulling springs 322, the positioning plate 323 is in an L-shaped structure, one ends of the positioning plate 323 close to each other are connected with pulling ropes 324, the pulling ropes 324 penetrate through the connecting frame 32 to be connected with limiting blocks 325, two groups of limiting grooves 326 matched with the limiting blocks 325 are arranged at the upper and lower part of the rear end of the connecting, the position of the pull rope 324 can be fixed, so that the position of the positioning plate 323 is fixed, the front end of the connecting frame 32 is provided with a guide rail, an electric sliding block 33 is arranged on the guide rail, a horizontal plate 34 is arranged at the front end of the electric sliding block 33, a plurality of groups of mounting plates 35 are sequentially arranged at the left end and the right end of the horizontal plate 34 in a front-back manner, a limiting column 36 is fixedly connected between the mounting plates 35, a lead screw 37 is rotatably connected between the mounting plates 35, a rotating mechanism 38 is arranged at the right end of the lead screw 37, the rotating mechanism 38 comprises a driven chain wheel 381, an L-shaped motor plate 382, a first motor 383, a driving chain wheel 384 and a first chain 381, the driven chain wheel 381 is fixedly sleeved at the right end of the lead screw 37, the L-shaped motor plate 382 is arranged at the upper end of the mounting plate 35, the first motor 383 is arranged at, the driven chain wheel 381 and the driving chain wheel 384 are meshed with the first chain 385, the first motor 383 can drive the driving chain wheel 384 to rotate, under the transmission action of the first chain 385, the driven chain wheel 381 is finally driven to rotate, the screw 37 is finally driven to rotate, the thread directions of the left end and the right end of the screw 37 are opposite, the left side and the right side of the screw 37 are symmetrically in threaded connection with the moving plate 39, balls are arranged at the lower end of the moving plate 39 and are in contact with the bottom of the paint box 2, the friction force between the moving plate 39 and the bottom of the paint box 2 is reduced by the balls, the limiting columns 36 penetrate through the moving plate 39 in a sliding mode, locking mechanisms 391 are arranged between the corresponding moving plates 39, each locking mechanism 391 comprises a connecting block 392, a clamping block 393, a cylinder 394, a pressing spring 395, a counter pressing block 396, a top extending plate 397, a return spring 398 and a spring plate, an annular groove is formed in the connecting block 392, a groove matched with the connecting block 392 is formed in the moving plate 39, the connecting block 392 is rotatably connected to the moving plate 39, the right end of the right connecting block 392 is connected with the clamping block 393, the clamping block 393 is matched with the clamping groove, when the upper end of the electric slider 33 and the lower end of the positioning plate 323 are at the same level, the clamping block 393 and the clamping groove at the upper end are at the same level, one side, close to the moving plate 39, of the connecting block 392 is of a cylindrical 394 structure, the side, close to each other, of the connecting block 392 is of a circular table structure, a heat-resistant rubber ring is arranged on the surface of the circular table structure, the end, close to each other, of the connecting block 392 is provided with the cylindrical 394, circular grooves are symmetrically formed in the cylindrical 394, the bottom ends of the circular grooves are connected with the counter-pressing block 396 through pressing springs 395, the outer end of the cylinder 394 is circumferentially provided with a top extending hole, a top extending plate 397 is in sliding butt joint in the top extending hole, the outer end of the top extending plate 397 is connected with a pressing block 3972 through a connecting spring 3975, the pressing block enables friction between the top extending plate 397 and the inner wall of the steel pipe to be increased, the fixing effect of the pressing block 3972 on the steel pipe is enhanced, one end, close to the axis of the cylinder 394, of the top extending plate 397 is provided with a spring plate 399 at one side far away from the pressing block 396, the spring plate 399 is connected with the inner wall of the cylinder 394 through a return spring 398, when the moving plate 39 moves towards the direction close to each other, the clamping blocks 393 can be finally driven to move towards each other to press the steel pipe, in the process that the pressing blocks 396 are mutually extruded towards the bottoms of the corresponding circular grooves to slide, and the top extending plate; during specific work, the steel pipe is placed on the locking mechanism 391 at one end, the rotating mechanism 38 can drive the moving plate 39 to move towards the direction close to each other to clamp the steel pipe, the electric slide block 33 is started to drive the horizontal plate 34 to move downwards, and therefore the moving plate 39 is driven to move downwards, and finally the effect of driving the steel pipe to move downwards is achieved.

The driving device 4 comprises an air cylinder plate 41, a stretching air cylinder 42, a rotating column 43, a rotating chain wheel 44, a second chain 45, a vertical plate 46 and a second motor 47, the air cylinder plate 41 is installed at the left end of the moving groove 311, the stretching air cylinder 42 is installed at the right end of the air cylinder plate 41, the ejecting end of the stretching air cylinder 42 is connected with the sliding block 31, a plurality of groups of rotating columns 43 are sequentially and rotatably connected with the upper side of the right end of the paint box 2 from front to back, a plurality of groups of rotating columns 43 are symmetrically arranged at the right side of the lower end of the paint box 2, a clamping groove 431 is formed at the left end of each rotating column 43, the rotating chain wheel 44 is fixedly sleeved at the right end of each rotating column 43, the rotating chain wheel 44 is connected through the second chain 45, the rotating chain wheel 44 is meshed with the second chain 45, the vertical plate 46 is installed at the right side of the upper end of the bottom plate 1, the output shafts of the second motors 47 are respectively connected with the corresponding rotating chain wheels 44; when the steel pipe coating machine works specifically, when the electric sliding block 33 slides downwards to the lowest position, the steel pipe is immersed in coating liquid, the stretching cylinder 42 is started, the sliding block 31 is pushed rightwards, the sliding block 31 drives the connecting frame 32 to move rightwards, finally the locking mechanism 391 to move rightwards is driven to move till the locking mechanism 391 at the right side is connected and matched with the rotating column 43 at the lower side, the second motor 47 at the lower side is started, the rotating column 43 at the lower side is driven to rotate under the linkage action of the rotating chain wheel 44 and the second chain 45 at the lower side, so that the locking mechanism 391 at the right side is driven to rotate, the steel pipe is finally driven to rotate, the steel pipe is fully coated during rotation, the motor is turned off, the stretching cylinder 42 is started to drive the sliding block 31 to move leftwards, the locking mechanism 391 is separated from the rotating column 43 at the lower side, the sliding block 31 is driven to move rightwards by the stretching cylinder 42, the locking mechanism 391 is connected and matched with the rotating column 43 on the upper side, the second motor 47 on the upper side is started, and the rotating column 43 on the upper side is driven to rotate under the linkage action of the rotating chain wheel 44 and the second chain 45 on the upper side, so that the locking mechanism 391 is driven to rotate, and finally, the steel pipe is driven to rotate, and redundant coating on the surface of the steel pipe is thrown out in the rotation process.

When the steel pipe clamping device works, a steel pipe is placed on the locking mechanism 391 at one end, the moving plates 39 can be driven to move towards the direction close to each other through the rotating mechanism 38 to clamp the steel pipe, at the moment, the locking mechanism 391 can support the steel pipe internally, the fixing effect of the steel pipe is enhanced, the moving plates 39 are driven to move downwards, the electric slide blocks 33 are started to drive the horizontal plates 34 to move downwards, and finally the effect of driving the steel pipe to move downwards is achieved, when the moving plates 39 are contacted with the bottom of the paint box 2, the clamping blocks 393 just correspond to the rotating grooves of the rotating columns 43 below, the steel pipe is immersed in coating liquid, the stretching air cylinders 42 are started to push the slide blocks 31 rightwards, the slide blocks 31 drive the connecting frames 32 to move rightwards, and finally the clamping blocks 393 are driven to be in clamping fit with the clamping grooves of the rotating columns 43 below, the second motor 47 below is, the lower rotating column 43 is driven to rotate, so that the right locking mechanism 391 is driven to rotate, the effect of driving the steel pipe to rotate is finally achieved, the steel pipe is fully coated with plastics, the pulling rope 324 is pulled to drive the positioning plate 323 to move relatively, the limiting block 325 is clamped into the lower limiting groove 326, the motor is turned off, the pulling cylinder 42 is started to drive the sliding block 31 to move leftwards, so that the clamping block is separated from the lower rotating column 43, the locking mechanism 391 is driven to move upwards through the electric sliding block 33 until the clamping block is level with the clamping groove of the upper rotating column 43, the sliding block 31 is driven to move rightwards through the pulling cylinder 42 until the clamping block 393 is connected and clamped with the clamping groove in the upper rotating column 43, the upper second motor 47 is started, the upper rotating column 43 is driven to rotate under the linkage effect of the upper rotating chain wheel 44 and the second chain 45, so that the locking mechanism 391, finally, the steel pipe is rotated, and the redundant coating on the surface of the steel pipe is thrown out in the rotation process.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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.