CN111331487B

CN111331487B - Waste steel pipe renovating device and renovating method

Info

Publication number: CN111331487B
Application number: CN202010155256.5A
Authority: CN
Inventors: 高小军
Original assignee: Shaoxing Keqiao Jingliang Machinery Co ltd
Current assignee: SHAOXING KEQIAO JINGLIANG MACHINERY Co.,Ltd.
Priority date: 2018-04-26
Filing date: 2018-04-26
Publication date: 2021-05-18
Anticipated expiration: 2038-04-26
Also published as: CN111331487A; CN108673316A; CN108673316B

Abstract

The invention provides a waste steel pipe renovating device and a renovating method, and relates to the field of machining. The problem of current old and useless steel pipe renovate device efficiency lower is solved. This old and useless steel pipe renovates device, the power distribution box comprises a box body, first baffle and second baffle are installed in proper order to the inside from the top down of box, the inner wall left side fixed mounting of box has transport mechanism, the inner wall top fixed mounting of box has the slide bar, the bottom fixed mounting of slide bar has the stopper, the surface cover of slide bar is equipped with removes the seat, it has the sliding sleeve to inlay on removing the seat, a sliding sleeve joint support section of thick bamboo, and sliding sleeve and slide bar sliding connection, the surface of slide bar just is located and encircles between sliding sleeve and the stopper and be provided with supporting spring, the inner wall both sides of box just are located and are provided with the fixed block between first baffle and the second baffle, and are connected with the mechanism. This old and useless steel pipe renovates device has reduced the process that the steel pipe renovated, has improved staff's work efficiency.

Description

Waste steel pipe renovating device and renovating method

The application is a divisional application of a waste steel pipe retreading device with the application date of 2018, 26.04 and the application number of CN 201810386943.0.

Technical Field

The invention relates to the technical field of machining, in particular to a waste steel pipe renovating device and a renovating method.

Background

The steel pipe is an indispensable part in the industry, and the steel pipe plays the effect of supporting and fixing, has extensive usage in the building trade, however when the steel pipe was used, because the surface of steel pipe is become by iron, iron can take place oxidation reaction in humid air, leads to the surface corrosion of steel pipe, seriously influences the use of steel pipe like this, consequently need to renovate the steel pipe, however current renovate the device and need polish the processing to old and useless steel pipe earlier, then paint the steel pipe that finishes polishing, such staff that needs transport the steel pipe of processing to the process, thereby increased staff's process, reduced staff's work efficiency.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a waste steel pipe retreading device, which solves the problem of low efficiency of the existing waste steel pipe retreading device.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a waste steel pipe renovating device comprises a box body, wherein a first baffle and a second baffle are sequentially installed inside the box body from top to bottom, a conveying mechanism is fixedly installed on the left side of the inner wall of the box body, a slide rod is fixedly installed at the top of the inner wall of the box body, a limiting block is fixedly installed at the bottom of the slide rod, a moving seat is sleeved on the surface of the slide rod, a slide sleeve is embedded on the moving seat and connected with a supporting cylinder, the slide sleeve is in sliding connection with the slide rod, a supporting spring is arranged on the surface of the slide rod and positioned between the slide sleeve and the limiting block in a surrounding mode, fixed blocks are arranged on two sides of the inner wall of the box body and positioned between the first baffle and the second baffle, a paint spraying mechanism is connected between the two fixed blocks, a polishing mechanism is fixedly installed at the top of the first baffle, a movable, the utility model discloses a transportation mechanism, including a gleitbretter, a support section of thick bamboo, movable rod, compression spring, supporting shoe, transport mechanism, the gleitbretter is kept away from the one end of movable rod and is supported the inner wall surface sliding connection of a section of thick bamboo, compression spring is installed to the right side symmetry of movable rod, compression spring keeps away from the one end of movable rod and the inner wall fixed connection of a support section of thick bamboo, the inner wall one side of a support section of thick bamboo and the right side of movable rod all are provided with the electro-magnet, the left side fixed mounting of movable rod has the supporting shoe, the one end fixed mounting that the movable rod was kept away from to the supporting shoe has the movable sleeve, one side fixed mounting that the seat was kept away from to the support section of thick bamboo has the lantern ring.

Preferably, the transportation mechanism comprises a cabinet body, a motor is fixedly mounted at the bottom of the inner wall of the cabinet body, a threaded rod is fixedly mounted at the output end of the motor, a bearing matched with the threaded rod is arranged at the top of the inner wall of the cabinet body, a supporting table is arranged in the cabinet body, a threaded sleeve matched with the threaded rod is embedded on the supporting table, a pulley is fixedly mounted at one side of the supporting table, one end of the pulley, far away from the supporting table, is in sliding connection with the surface of the inner wall of the cabinet body, a connecting rod is fixedly mounted at one end of the supporting table, far away from the pulley, penetrates through the cabinet body and extends to the outside of the cabinet body, a rotating motor is fixedly mounted at one end of the connecting rod, which is located at the outside of the cabinet body, the left side of mounting is seted up flutedly, the inner wall fixed surface of mounting has the cushion, one side fixed mounting of mounting inner wall has the support cylinder, the one end that the support cylinder kept away from the mounting runs through the mounting and extends to the inside of recess, the inside fixed mounting that the one end of support cylinder just is located the recess has the fastening preforming.

Preferably, grinding machanism includes the backup pad, the inside sliding connection of backup pad has the movable plate, the one end of movable plate is connected with even board, even one side that the movable plate was kept away from to the board runs through the backup pad and extends to the outside of backup pad, even one side of board and the outside fixed mounting that is located the backup pad have the grinding piece, the inside symmetry of backup pad is provided with the connecting block, the equal swing joint in both sides of connecting block has the connecting rod, and wherein the inner wall swing joint of one side connecting rod and backup pad, the surperficial swing joint of opposite side connecting rod and movable plate, inner wall one side fixed mounting of backup pad has the hydraulic pressure seat, the output of hydraulic pressure seat is provided with the hydraulic stem, hydraulic stem through connection piece.

Preferably, the mechanism of spraying paint includes the support column, and the both sides of support column all with fixed block fixed connection, the outside cover of support column is equipped with the cover seat, the inner wall top and the equal fixed mounting in bottom of cover seat have the gag lever post, the one end that the cover seat was kept away from to the gag lever post is provided with spacing wheel, the top and the bottom of support column and the position that corresponds spacing wheel have seted up the spacing groove, the front surface fixed mounting of support column has the rack, fixed surface installs the base before the inner wall of cover seat, the top of base is provided with servo motor, servo motor's output is provided with the gear, and wheel and rack intermeshing, the rear surface fixed mounting of cover seat has the spray gun.

Preferably, the polishing plate is provided with an arc-shaped structure.

Preferably, the trigger is fixedly installed on the surface of the inner wall of the cabinet body, and the trigger is electrically connected with the electromagnet.

Preferably, a cushion pad is fixedly mounted on the top of the inclined plate.

Preferably, the outer side of the movable sleeve is fixedly provided with an anti-slip sleeve.

(III) advantageous effects

The invention provides an umbrella water removing device. The method has the following beneficial effects:

1. according to the waste steel pipe renovating device, the grinding mechanism can quickly grind the surface of the waste steel pipe after the waste steel pipe is placed in the device through the matched use of the grinding mechanism, the paint spraying mechanism and the conveying mechanism, meanwhile, the waste steel pipe after grinding can be conveyed into the paint spraying mechanism without the operation of workers through the matched use of the conveying mechanism, the steel pipe after grinding is painted, the finished steel pipe is conveyed onto the inclined plate finally, and the output box body is conveyed finally, so that the steel pipe renovating process is reduced, and the working efficiency of the workers is improved.

2. According to the waste steel pipe refurbishing device, the polishing mechanism is arranged, so that the polishing piece can support the steel pipe, when the surface of the steel pipe is not completely polished by the polishing mechanism, the steel pipe can be clamped by the polishing piece, and the surface of the steel pipe can be completely polished, so that the surface of the steel pipe can be controlled to be completely polished, the surface polishing quality of the steel pipe is improved, and the working quality of the refurbishing device is improved.

3. According to the waste steel pipe renovating device, due to the arrangement of the conveying mechanism, when the supporting table touches the trigger, the electromagnet is electrified, so that the movable sleeve extends inwards, the movable sleeve is automatically separated from the steel pipe, the steel pipe can be automatically separated, the blanking work of the steel pipe is facilitated, and the working efficiency of people is improved.

4. According to the waste steel pipe renovating device, the surface of the steel pipe can be quickly painted through the arrangement of the paint spraying mechanism, and the sleeve seat reciprocates on the support column, so that paint on the surface of the steel pipe is more uniformly attached, and the later maintenance of the steel pipe is guaranteed.

Drawings

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

FIG. 2 is a schematic structural view of a support cylinder according to the present invention;

FIG. 3 is a schematic structural view of the transport mechanism of the present invention;

FIG. 4 is a side view of the construction of the fastener of the present invention;

FIG. 5 is a schematic structural view of a grinding mechanism according to the present invention;

FIG. 6 is a top view of the grinding mechanism of the present invention;

fig. 7 is a structural side view of the painting mechanism of the present invention.

In the figure: 1 box body, 2 first baffle, 3 second baffle, 4 transportation mechanism, 5 sliding rod, 6 limiting block, 7 moving seat, 8 sliding sleeve, 9 supporting spring, 10 fixing block, 11 paint spraying mechanism, 12 polishing mechanism, 13 movable rod, 14 sliding sheet, 15 compression spring, 16 electromagnet, 17 supporting block, 18 movable sleeve, 19 lantern ring, 20 sloping plate, 21 feeding channel, 22 discharging channel, 23 cabinet body, 24 motor, 25 threaded rod, 26 bearing, 27 supporting platform, 28 threaded sleeve, 29 pulley, 30 connecting rod, 31 rotating motor, 32 rotating shaft, 33 fixing piece, 34 groove, 35 cushion block, 36 supporting cylinder, 37 fastening pressing sheet, 38 supporting plate, 39 moving plate, 40 connecting plate, 41 polishing sheet, 42 connecting block, 43 connecting rod, 44 hydraulic seat, 45 hydraulic rod, 46 supporting column, 47 lantern seat, 48 limiting rod, 49 limiting wheel, 50 limiting groove, 51 rack, 52 base, 53 servo motor, Gear 54, paint spray gun 55, trigger 56, cushion 57, slip cover 58, support cartridge 59.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a waste steel pipe renovating device, as shown in figure 1-2, which comprises a box body 1, wherein a first baffle 2 and a second baffle 3 are sequentially arranged inside the box body 1 from top to bottom, a transportation mechanism 4 is fixedly arranged on the left side of the inner wall of the box body 1, a slide rod 5 is fixedly arranged on the top of the inner wall of the box body 1, a limiting block 6 is fixedly arranged at the bottom of the slide rod 5, the limiting block 6 has the function of supporting a supporting spring 9, so that the supporting spring 9 can be well fixed, a moving seat 7 can be placed to be separated from the slide rod 5, a moving seat 7 is sleeved on the surface of the slide rod 5, a sliding sleeve 8 is embedded on the moving seat 7, the sliding sleeve 8 is connected with a supporting cylinder 59, the sliding sleeve 8 is connected with the slide rod 5 in a sliding manner, the supporting spring 9 is arranged on the surface of the slide rod 5 and positioned between the sliding sleeve 8, a paint spraying mechanism 11 is connected between the two fixed blocks 10, a polishing mechanism 12 is fixedly installed at the top of the first baffle 2, a movable rod 13 is arranged inside the supporting cylinder 59, sliding sheets 14 are arranged at the top and the bottom of the movable rod 13, one end of each sliding sheet 14, far away from the movable rod 13, is in sliding connection with the surface of the inner wall of the supporting cylinder 59, compression springs 15 are symmetrically installed at the right side of the movable rod 13, one end of each compression spring 15, far away from the movable rod 13, is fixedly connected with the inner wall of the supporting cylinder 59, electromagnets 16 are arranged on one side of the inner wall of the supporting cylinder 59 and the right side of the movable rod 13, the two magnetic poles connected with the two electromagnets 16 are opposite, after being electrified, the two electromagnets have an attraction effect, a supporting block 17 is fixedly installed at the left side of the movable rod 13, a movable sleeve 18 is fixedly installed at one end of the supporting block 17, far, an inclined plate 20 is fixedly arranged on one side of the conveying mechanism 4 and below the second baffle 3, the inclined plate 20 has a conveying function, processed steel pipes can be automatically conveyed to a discharge passage 22 through gravity, a cushion pad 57 is fixedly arranged on the top of the inclined plate 20, one end of the inclined plate 20, which is far away from the conveying mechanism 4, is fixedly connected with the inner wall of the box body 1, the top of the box body 1 is communicated with a feed passage 21, the discharge passage 22 is arranged on the right side of the box body 1 and above the inclined plate 20, the grinding mechanism 12, the paint spraying mechanism 11 and the conveying mechanism 4 are matched for use, after the waste steel pipes are placed in the device, the grinding mechanism 12 can quickly grind the surfaces of the waste steel pipes, and meanwhile, the waste steel pipes after being ground can be conveyed into the paint spraying mechanism 11 without the operation of workers through the matching use of the conveying mechanism 4, the steel pipes finished by polishing are painted, the finished steel pipes are transported to the inclined plate and finally transported to the output box body 1, so that the steel pipe renovating process is reduced, and the working efficiency of workers is improved.

The embodiment of the invention provides a waste steel pipe renovating device, as shown in fig. 3-4, a transportation mechanism 4 comprises a cabinet body 23, a motor 24 is fixedly installed at the bottom of the inner wall of the cabinet body 23, a threaded rod 25 is fixedly installed at the output end of the motor 24, a bearing 26 matched with the threaded rod 25 is arranged at the top of the inner wall of the cabinet body 23, a support table 27 is arranged inside the cabinet body 23, a threaded sleeve 28 matched with the threaded rod 25 is embedded on the support table 27, a pulley 29 is fixedly installed at one side of the support table 27, the pulley 29 can enable the support table 27 to operate in a normal state, one end of the pulley 29 far away from the support table 27 is in sliding connection with the surface of the inner wall of the cabinet body 23, a connecting rod 30 is fixedly installed at one end of the support table 27 far away from the pulley 29, one end of the connecting rod 30 far away from the support table, the output end of the rotating motor 31 is connected with a rotating shaft 32, one end of the rotating shaft 32, which is far away from the rotating motor 31, is provided with a fixing part 33, the left side of the fixing part 33 is provided with a groove 34, the surface of the inner wall of the fixing part 33 is fixedly provided with a cushion block 35, one side of the inner wall of the fixing part 33 is fixedly provided with a supporting cylinder 36, one end of the supporting cylinder 36, which is far away from the fixing part 33, penetrates through the fixing part 33 and extends to the inside of the groove 34, one end of the supporting cylinder 36, which is positioned in the inside of the groove 34, is fixedly provided with a fastening pressing sheet 37, the surface of the inner wall of the cabinet body 23 is fixedly provided with a trigger 56, the trigger 56 is electrically connected with the electromagnet 16, through the arrangement of the transportation mechanism 4, when the supporting platform 27 touches the trigger 56, the electromagnet 16 is electrified, the working efficiency of people is improved.

The embodiment of the invention provides a waste steel pipe renovating device, as shown in fig. 5-6, a polishing mechanism 12 comprises a supporting plate 38, a moving plate 39 is slidably connected inside the supporting plate 38, one end of the moving plate 39 is connected with a connecting plate 40, one side of the connecting plate 40, which is far away from the moving plate 39, penetrates through the supporting plate 38 and extends to the outer side of the supporting plate 38, a polishing disc 41 is fixedly installed on one side of the connecting plate 40, which is positioned on the outer side of the supporting plate 38, the polishing disc 41 is provided with an arc-shaped structure, connecting blocks 42 are symmetrically arranged inside the supporting plate 38, two sides of the connecting blocks 42 are movably connected with connecting rods 43, wherein one side of the connecting rods 43 is movably connected with the inner wall of the supporting plate 38, the other side of the connecting rods 43 is movably connected with the surface of the moving plate 39, a hydraulic seat, and hydraulic stem 45 and connecting block 42 fixed connection, through the setting to grinding mechanism 12, make grinding piece 41 can support the steel pipe, when grinding mechanism 12 did not polish the steel pipe surface completely, the steel pipe can be blocked by grinding piece 41, can control the completion of polishing completely on steel pipe surface like this to improve the quality of steel pipe surface polishing, improved renovate device's operating quality.

The embodiment of the invention provides a waste steel pipe renovating device, as shown in fig. 7, a paint spraying mechanism 11 comprises a supporting column 46, two sides of the supporting column 46 are fixedly connected with a fixed block 10, a sleeve seat 47 is sleeved outside the supporting column 46, a limiting rod 48 is fixedly installed at the top and the bottom of the inner wall of the sleeve seat 47, one end, far away from the sleeve seat 47, of the limiting rod 48 is provided with a limiting wheel 49, the top and the bottom of the supporting column 46 are provided with a limiting groove 50 corresponding to the position of the limiting wheel 49, the front surface of the supporting column 46 is fixedly provided with a rack 51, the front surface of the inner wall of the sleeve seat 47 is fixedly provided with a base 52, the top of the base 52 is provided with a servo motor 53, the output end of the servo motor 53 is provided with a gear 54, the gear 54 is meshed with the rack 51, the rear surface of the sleeve seat 47 is fixedly provided with a paint, meanwhile, the sleeve seat 47 moves on the supporting column 46 in a reciprocating mode, so that paint on the surface of the steel pipe is more uniform in adhesion, and later maintenance of the steel pipe is guaranteed.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

The working principle is as follows: when the steel pipe polishing machine works, firstly, a steel pipe is placed into the box body 1 through the feeding channel 21, then the two ends of the steel pipe are fixed by the supporting cylinder 59 of the conveying mechanism 4, then the surface of the steel pipe is fixed by the supporting cylinder 36, after the fixing is finished, the supporting cylinder 36 is closed, then the motor 24 is started, the supporting table 27 is driven by the motor 24 to be conveyed downwards, when the steel pipe is conveyed to the position of the polishing mechanism 12, the rotating motor 31 and the hydraulic seat 44 are started, the hydraulic seat 44 adjusts the position of the polishing piece 41, after the adjustment is finished, the hydraulic seat 44 is closed, then the rotating steel pipe is in contact with the polishing piece 41, after the polishing is finished, the steel pipe just penetrates through the polishing piece 41 and then enters the position of the paint spraying mechanism 11, then the paint spraying gun 55 and the servo motor 53 are started, the servo motor 53 drives the sleeve seat 47 to reciprocate, and therefore paint sprayed on the paint spraying gun, after painting, close paint gun 55 and servo motor 53, then the steel pipe continues to transport downwards, when supporting bench 27 touches trigger 56, thereby electro-magnet 16 can automatic circular telegram make the movable sleeve 18 break away from the steel pipe, make the steel pipe carry out the unloading work like this, the steel pipe after the unloading is transported away through swash plate 20, motor 24 overturns simultaneously, transports initial position to connecting rod 30, and supporting spring 9 makes removal seat 7 transport initial position through elasticity simultaneously, accomplishes whole work.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a waste steel pipe retreading device, includes box (1), first baffle (2) and second baffle (3), its characterized in that are installed in proper order from the top down to the inside of box (1): the inner wall of the box body (1) is fixedly provided with a conveying mechanism (4), the top of the inner wall of the box body (1) is fixedly provided with a sliding rod (5), the bottom of the sliding rod (5) is fixedly provided with a limiting block (6), the surface of the sliding rod (5) is sleeved with a moving seat (7), the moving seat (7) is inlaid with a sliding sleeve (8), the sliding sleeve (8) is connected with a supporting cylinder (59), the sliding sleeve (8) is in sliding connection with the sliding rod (5), the surface of the sliding rod (5) is positioned between the sliding sleeve (8) and the limiting block (6) and is surrounded with a supporting spring (9), the two sides of the inner wall of the box body (1) are positioned between a first baffle (2) and a second baffle (3) and are provided with a fixed block (10), a paint spraying mechanism (11) is connected between the two fixed blocks (10), the top of the first baffle (, support cylinder (59) inside be provided with movable rod (13), the top and the bottom of movable rod (13) all are provided with gleitbretter (14), the one end of movable rod (13) and the inner wall surface sliding connection of support cylinder (59) are kept away from in gleitbretter (14), compression spring (15) are installed to the right side symmetry of movable rod (13), the one end of movable rod (13) and the inner wall fixed connection of support cylinder (59) are kept away from in compression spring (15), inner wall one side of support cylinder (59) and the right side of movable rod (13) all are provided with electro-magnet (16), the left side fixed mounting of movable rod (13) has supporting shoe (17), the one end fixed mounting that movable rod (13) were kept away from in supporting shoe (17) has movable sleeve (18), one side fixed mounting that removal seat (7) was kept away from in support cylinder (59) has lantern ring (19), the below fixed mounting that one side of transport mechanism (4) just is located second baffle (3) has swash plate (swash plate 20) One end, far away from the conveying mechanism (4), of the inclined plate (20) is fixedly connected with the inner wall of the box body (1), the top of the box body (1) is communicated with a feeding channel (21), and a discharging channel (22) is formed in the right side of the box body (1) and above the inclined plate (20);

the transportation mechanism (4) comprises a cabinet body (23), a motor (24) is fixedly mounted at the bottom of the inner wall of the cabinet body (23), a threaded rod (25) is fixedly mounted at the output end of the motor (24), a bearing (26) matched with the threaded rod (25) is arranged at the top of the inner wall of the cabinet body (23), a supporting table (27) is arranged inside the cabinet body (23), a threaded sleeve (28) matched with the threaded rod (25) is inlaid on the supporting table (27), a pulley (29) is fixedly mounted at one side of the supporting table (27), one end, away from the supporting table (27), of the pulley (29) is connected with the inner wall surface of the cabinet body (23) in a sliding mode, a connecting rod (30) is fixedly mounted at one end, away from the supporting table (27), of the connecting rod (30) penetrates through the cabinet body (23) and extends to the outside of the cabinet body (23), a rotating motor (31) is fixedly mounted at one end of the connecting rod (30) and located outside the cabinet body (23), the output end of the rotating motor (31) is connected with a rotating shaft (32), a fixing piece (33) is arranged at one end, far away from the rotating motor (31), of the rotating shaft (32), a groove (34) is formed in the left side of the fixing piece (33), a cushion block (35) is fixedly mounted on the surface of the inner wall of the fixing piece (33), a supporting cylinder (36) is fixedly mounted at one side of the inner wall of the fixing piece (33), one end, far away from the fixing piece (33), of the supporting cylinder (36) penetrates through the fixing piece (33) and extends into the groove (34), and a fastening pressing sheet (37) is fixedly mounted at one end of the supporting cylinder (36) and;

the polishing mechanism (12) comprises a supporting plate (38), a moving plate (39) is connected to the inside of the supporting plate (38) in a sliding mode, one end of the moving plate (39) is connected with a connecting plate (40), one side, far away from the moving plate (39), of the connecting plate (40) penetrates through the supporting plate (38) and extends to the outer side of the supporting plate (38), a polishing disc (41) is fixedly mounted on one side of the connecting plate (40) and located on the outer side of the supporting plate (38), connecting blocks (42) are symmetrically arranged inside the supporting plate (38), connecting rods (43) are movably connected to the two sides of the connecting blocks (42), one side of each connecting rod (43) is movably connected with the inner wall of the corresponding supporting plate (38), the other side of each connecting rod (43) is movably connected with the surface of the corresponding moving plate (39), a hydraulic seat (44) is fixedly mounted on one side of the inner wall of the supporting plate, the hydraulic rod (45) penetrates through the connecting block (42), and the hydraulic rod (45) is fixedly connected with the connecting block (42).

2. The waste steel pipe retreading device as recited in claim 1, wherein: the paint spraying mechanism (11) comprises a supporting column (46), both sides of the supporting column (46) are fixedly connected with a fixed block (10), a sleeve seat (47) is sleeved on the outer side of the supporting column (46), a limiting rod (48) is fixedly mounted at the top and the bottom of the inner wall of the sleeve seat (47), one end, far away from the sleeve seat (47), of the limiting rod (48) is provided with a limiting wheel (49), a limiting groove (50) is formed in the top and the bottom of the supporting column (46) and corresponds to the position of the limiting wheel (49), a rack (51) is fixedly mounted on the front surface of the supporting column (46), a base (52) is fixedly mounted on the front surface of the inner wall of the sleeve seat (47), a servo motor (53) is arranged at the top of the base (52), a gear (54) is arranged at the output end of the servo motor (53), and the gear (54) and, and a paint spray gun (55) is fixedly arranged on the rear surface of the sleeve seat (47).

3. The waste steel pipe retreading device as recited in claim 1, wherein: the polishing piece (41) is provided with an arc-shaped structure.

4. The waste steel pipe retreading device as recited in claim 1, wherein: the inner wall surface fixed mounting of cabinet body (23) has trigger (56), and trigger (56) and electro-magnet (16) electric connection.

5. The waste steel pipe retreading device as recited in claim 1, wherein: the top of the inclined plate (20) is fixedly provided with a buffer pad (57).

6. The waste steel pipe retreading device as recited in claim 1, wherein: and an anti-slip sleeve (58) is fixedly arranged on the outer side of the movable sleeve (18).

7. A method for renovating a device for old and useless steel pipes according to any of the claims 1-6, characterized in that: when the steel pipe polishing machine works, a steel pipe is placed into a box body (1) through a feeding channel (21), then two ends of the steel pipe are fixed by a conveying mechanism (4) and a supporting cylinder (59), then the surface of the steel pipe is fixed by a supporting cylinder (36), the supporting cylinder (36) is closed after the fixing is finished, then a motor (24) is started, the motor (24) drives a supporting table (27) to convey downwards, the steel pipe is conveyed to the polishing mechanism (12), a rotating motor (31) and a hydraulic seat (44) are started, the position of a polishing plate (41) is adjusted by the hydraulic seat (44), after the adjustment is finished, the hydraulic seat (44) is closed, then the rotating steel pipe is in contact with the polishing plate (41), after the polishing is finished, the steel pipe just passes through the polishing plate (41), then enters the position of a paint spraying mechanism (11), and then a paint spraying gun (55) and a servo motor (53) are started, servo motor (53) drive cover seat (47) reciprocating motion, thereby make paint gun (55) go up the paint of injection can attach to the surface of steel pipe, wait to spray paint the completion after, close paint gun (55) and servo motor (53), then the steel pipe continues the transportation downwards, wait to prop up supporting bench (27) and touch trigger (56) when, thereby electro-magnet (16) can automatic circular telegram make movable cover (18) break away from the steel pipe, it carries out the unloading work to make the steel pipe like this, the steel pipe after the unloading is transported away through swash plate (20), motor (24) upset simultaneously, transport initial position connecting rod (30), supporting spring (9) make removal seat (7) transport initial position through elasticity simultaneously, accomplish whole work.