CN117772471B

CN117772471B - Steel pipe paint spraying production line

Info

Publication number: CN117772471B
Application number: CN202410199417.9A
Authority: CN
Inventors: 郑春江; 刘锋涛
Original assignee: Hebei Tengtian Welded Pipe Equipment Manufacturing Co ltd
Current assignee: Hebei Tengtian Welded Pipe Equipment Manufacturing Co ltd
Priority date: 2024-02-23
Filing date: 2024-02-23
Publication date: 2024-04-19
Anticipated expiration: 2044-02-23
Also published as: CN117772471A

Abstract

The invention provides a steel pipe paint spraying production line, and relates to the technical field of steel pipe paint spraying equipment; the paint spraying device comprises a paint spraying mechanism, wherein the paint spraying mechanism comprises a box body, an outer paint spraying unit and an inner paint spraying unit. The inner paint spraying unit comprises a mounting rod, two supporting components and a plurality of second paint spraying heads; each second paint spraying head is respectively arranged on the mounting rod, a second joint is arranged at the input end of each second paint spraying head, two supporting components are respectively arranged at two ends of the mounting rod, a plurality of first joints which are opposite to each second joint one by one are arranged on at least one supporting component, each first joint is connected with the output end of the paint supply device, the two supporting components can respectively fix the mounting rod or separate from the mounting rod, and each first joint is correspondingly connected with or separated from the second joint. The steel pipe paint spraying production line can realize continuous paint spraying on the inner wall of the steel pipe.

Description

Steel pipe paint spraying production line

Technical Field

The invention relates to the technical field of steel pipe paint spraying equipment, in particular to a steel pipe paint spraying production line.

Background

Steel pipe is a widely used component, and its main failure form is rust; in order to delay the rust time of the steel pipe, the steel pipe needs to be subjected to paint spraying treatment after the steel pipe is processed and molded.

The traditional steel pipe paint spraying mode is to manually paint, namely, the steel pipe is firstly tiled in a paint spray booth by manpower, and then the steel pipe is manually painted, so that the mode has high labor intensity, low production efficiency and heavy environmental pollution; aiming at the problems, a part of production lines capable of automatically spraying paint on the steel pipe exist at present, the production lines can automatically finish the feeding of the steel pipe, the steel pipe can be conveyed to a paint spraying device, the paint spraying device can automatically spray paint on the steel pipe, and the concrete reference can be made to China patent application with the application number 2019113256945; however, the above production line often has difficulty in painting the inner wall of the steel pipe;

Currently, some devices are capable of painting the inner wall of a steel pipe, for example, chinese patent application 2021228709955, which uses a painting device to paint the inner wall of a steel pipe by extending the painting device into the pipe along with a rod-like structure. However, this method has a disadvantage in that it cannot be used for continuous painting of steel pipes in an in-line manner, since it is necessary to extend a rod-like structure into the steel pipe from one end thereof and withdraw it from the same end thereof.

In short, the existing steel pipe paint spraying production line is difficult to paint the inner wall of the steel pipe, so that the possibility that the inner wall of the steel pipe is corroded exists.

Disclosure of Invention

Therefore, the invention provides a steel pipe paint spraying production line, which at least partially solves the technical problem that the inner wall of a steel pipe is difficult to paint in the existing steel pipe paint spraying production line.

The technical scheme of the invention is as follows:

The invention provides a steel pipe paint spraying production line, which comprises a paint spraying mechanism, wherein the paint spraying mechanism comprises:

the box body is provided with a paint spraying channel penetrating through the box body for the steel pipe to pass through;

the outer paint spraying unit comprises a paint supply device and a plurality of first paint spraying heads, wherein each first paint spraying head is arranged in the paint spraying channel and connected with the paint supply device, and the first paint spraying heads are arranged at intervals along the circumferential direction of the moving path of the steel pipe in the paint spraying channel;

The inner paint spraying unit comprises a mounting rod, two supporting components and a plurality of second paint spraying heads; each second paint spraying head is respectively arranged on the mounting rod, and a second joint is arranged at the input end of each second paint spraying head; the two support assemblies are respectively arranged at two ends of the mounting rod, at least one support assembly is provided with a plurality of first connectors which are opposite to the second connectors one by one, and each first connector is connected with the output end of the paint supply device; the two support assemblies can respectively fix the mounting rod or separate from the mounting rod, and each first connector is connected with or separated from the corresponding second connector along with the corresponding support assembly;

the two supporting components can be alternately fixed and separated from the corresponding ends of the mounting rod, so that the two ends of the mounting rod are alternately suspended, the steel pipe can be movably sleeved with one end of the mounting rod and is moved out of the other end of the mounting rod, and the inner wall of the steel pipe is sprayed with paint by each second paint spraying head.

Further, the two supporting components respectively comprise a driving device and a clamping device; the clamping device comprises two clamping pieces which are respectively arranged at two opposite sides of the mounting rod, first wedge surfaces are respectively arranged on the two clamping pieces, and the two first wedge surfaces are arranged in a V shape; the first wedge surface is fixed relative to the box body and is correspondingly attached to the first wedge surface; when the two clamping pieces are driven by the driving device to move along the axial direction of the mounting rod, the two clamping pieces can be close to each other to clamp the mounting rod through pushing of the second wedge to the first wedge surface.

Further, the two clamping pieces respectively comprise a clamping block and a mounting block which is slidably arranged on the clamping block, a first elastic piece is arranged between the clamping block and the mounting block, the first wedge surface is arranged on the clamping block, and the first joint is arranged on the mounting block;

When the driving device drives the two clamping pieces to clamp the mounting rod, the mounting block and the clamping blocks synchronously move to enable the clamping blocks to clamp the mounting rod, and then the first elastic piece is compressed to move relative to the clamping blocks to enable the first connector to be connected with the corresponding second connector.

Further, the driving device comprises an air cylinder and a driving rod, the driving rod can be driven by the air cylinder to move along the axial direction of the mounting rod, two strip holes are formed in the driving rod, and the length directions of the two strip holes are perpendicular to the moving direction of the driving rod; the two mounting blocks are respectively provided with a push rod, and the push rods on the two mounting blocks correspondingly penetrate through the two strip holes.

Further, a floating block is arranged on the mounting block, second elastic pieces are respectively arranged between two opposite sides of the floating block, which are parallel to the axial direction of the mounting rod, and the mounting block, and the first connector is arranged on the floating block;

The mounting rod is provided with a positioning structure positioned in front of the second connector, and when the mounting block drives the first connector to be connected with the second connector, the positioning structure can push the floating block to enable the first connector to be opposite to the second connector.

Further, the device also comprises a conveying mechanism positioned in front of the paint spraying mechanism and a feeding mechanism arranged on one side of the conveying mechanism; the conveying mechanism comprises a plurality of racks which are arranged at intervals along the moving direction of the steel pipe, and a plurality of conveying rollers are rotatably arranged on each rack respectively; the feeding mechanism comprises a material rack, a power unit and a transfer piece, wherein the power unit drives the transfer piece, and the transfer piece can move the steel pipe from the material rack to each conveying roller.

Further, the material rack comprises a base and a material supporting plate; the material supporting plate is arranged on the base in a lifting manner and is used for placing square stacked steel pipes; the base is provided with a reference surface, a middle rotating surface lower than the reference surface and an inclined surface connecting the reference surface and the middle rotating surface, and the base is provided with a horizontal pushing mechanism;

The material supporting plate can be lifted to enable the steel pipe on the top layer to be higher than the reference surface, and the horizontal pushing mechanism can push the steel pipe on the top layer, so that the steel pipe on the top layer can slide onto the transfer surface after passing through the inclined surface one by one.

Further, the power unit comprises a motor and a rotating shaft, the motor and the rotating shaft are respectively arranged on the base, and the rotating shaft can be driven by the motor to rotate; the transfer piece comprises a plurality of material turning arms, and each material turning arm is arranged on the rotating shaft at intervals and is opposite to the interval between two adjacent frames;

The material turning arm comprises a shell, two material supporting pieces and a central gear; the middle part of the shell is fixedly sleeved on the rotating shaft; the two material supporting pieces are respectively arranged at two opposite sides of the rotating shaft and are respectively and rotatably arranged on the shell, and the two material supporting pieces are respectively provided with a material supporting groove;

the central gear is positioned in the shell, coaxial with the rotating shaft and fixedly arranged on the base; the shell is internally provided with first gears which are respectively and coaxially fixedly connected with the two material supporting pieces, and a plurality of second gears are respectively and sequentially meshed between the two first gears and the central gear; when the rotating shaft drives the shell to rotate, the central gear drives the first gears, and the material supporting grooves on the two material supporting pieces are kept upwards.

Further, the paint spraying device also comprises an intermediate frequency heating mechanism positioned at the upstream of the paint spraying mechanism; the medium-frequency heating mechanism comprises a base, a power device and at least two medium-frequency heating furnaces, wherein the inner diameters of the medium-frequency heating furnaces are respectively different; the power device and the intermediate frequency heating furnaces are respectively arranged on the base, and the intermediate frequency heating furnaces can be respectively pushed by the power device to move on the base, so that the intermediate frequency heating furnaces can alternatively move to be opposite to the paint spraying mechanism.

The working principle and the beneficial effects of the invention are as follows:

According to the steel pipe paint spraying production line, firstly, the outer wall of a steel pipe can be sprayed with paint through a plurality of first paint spraying heads which are arranged at intervals around the moving path of the steel pipe in a paint spraying channel; secondly, through installation pole, two supporting components and a plurality of second lacquer heads that set up on the installation pole, the both ends of two supporting components fixed mounting pole in turn for the both ends of installation pole can be unsettled in turn, thereby can make the steel pipe embolia from the one end of installation pole, and shift out from the other end of installation pole, when each second lacquer head on the steel pipe passes through the installation pole, each second lacquer head can spray paint the inner wall of steel pipe. In a word, the steel pipe paint spraying production line can conveniently carry out continuous paint spraying operation on the outer wall and the inner wall of the steel pipe.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description.

Fig. 1 is a perspective view of a steel pipe paint spraying production line provided by an embodiment of the invention;

Fig. 2 is a perspective view of a conveying mechanism and a feeding mechanism provided by an embodiment of the present invention;

FIG. 3 is an internal cross-sectional view of a material turning arm provided by an embodiment of the present invention;

fig. 4 is a front view of a material turning arm according to an embodiment of the present invention;

fig. 5 is a front view of an intermediate frequency heating mechanism according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an internal structure of a case according to an embodiment of the present invention;

FIG. 7 is a perspective view of a spray mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic view of a second support device according to an embodiment of the present invention when the second support device is separated from the mounting rod;

Fig. 9 is a schematic structural diagram of a driving device according to an embodiment of the present invention;

Fig. 10 is a schematic structural view of a second supporting device according to an embodiment of the present invention

Fig. 11 is a partial enlarged view at a in fig. 10.

In the figure: 100. a conveying mechanism; 110. a frame; 120. a conveying roller;

200. A feeding mechanism; 210. a material rack; 211. a base; 212. a material supporting plate; 213. an inclined plane; 214. a transfer surface; 221. a motor; 222. a rotating shaft; 223. a turning arm; 224. a housing; 225. a sun gear; 2251. a fixed shaft; 226. a material supporting piece; 227. a mounting shaft; 228. a first gear; 230. an intermediate shaft; 231. a second gear; 201. a material supporting groove;

300. An intermediate frequency heating mechanism; 310. a base; 311. a power device; 312. an intermediate frequency heating furnace; 313. a slide;

400. A paint spraying mechanism; 410. a case; 420. a first paint spray head; 430. a mounting rod; 431. a second joint; 440. a first support assembly; 450. a second support assembly; 451. a first joint; 452. a clamping member; 4521. a push rod; 453. a first wedge surface; 454. a second wedge surface; 455. clamping blocks; 456. a mounting block; 457. a first elastic member; 458. a slider; 459. a second elastic member; 460. a driving rod; 461. a slit hole; 401. a T-shaped groove; 402. a V-shaped groove;

500. And (3) a steel pipe.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The embodiment provides a steel pipe paint spraying production line, which is shown with reference to fig. 1, and comprises a conveying mechanism 100, a feeding mechanism 200, an intermediate frequency heating mechanism 300 and a paint spraying mechanism 400. Wherein, the feeding mechanism 200 is positioned at one side of the conveying mechanism 100 and is used for transferring the steel pipes 500 placed in bundles to the conveying mechanism 100 one by one; the conveying mechanism 100 is used for conveying the steel pipe 500 to the intermediate frequency heating mechanism 300 so that the intermediate frequency heating mechanism 300 preheats the steel pipe 500, and conveying the preheated steel pipe 500 to the paint spraying mechanism 400 so that the paint spraying mechanism 400 sprays paint on the inner surface and the outer surface of the steel pipe 500.

Referring to fig. 1 and 2, the conveying mechanism 100 of the present embodiment includes a plurality of frames 110 disposed at intervals, and a plurality of conveying rollers 120 are rotatably disposed on each frame 110, and when the steel pipes 500 are transferred onto each conveying roller 120, the rotation of each conveying roller 120 drives the steel pipes 500 thereon to move forward, wherein the moving direction of each steel pipe 500 is the interval direction of each frame 110.

The feeding mechanism 200 specifically includes a material rack 210, a power unit and a transfer member; wherein the power unit is capable of driving the transfer member to transfer the steel pipe 500 from the rack 210 to each of the transfer rollers 120.

In this embodiment, referring to fig. 2, the material rack 210 includes a base 211 and a lifting material supporting plate 212 disposed on the base 211, where the material supporting plate 212 is used to place square stacked steel pipes 500; the base 211 is further formed with a reference surface, a middle rotation surface 214 lower than the reference surface, and a slope 213 connecting the reference surface and the middle rotation surface 214, and the base 211 is further provided with a horizontal pushing mechanism.

Based on this structure, the pallet 212 can be lifted up to make the top-layer steel pipe 500 higher than the reference surface, and the horizontal pushing mechanism can push the top-layer steel pipe 500, so that the top-layer steel pipe 500 slides onto the transfer surface 214 one by one through the inclined surface 213. It should be noted that, the positioning rod is provided on the transfer surface, and the steel pipe 500 stops moving after moving to the positioning rod, which is not shown in the drawings of the present embodiment because it does not affect understanding.

In this embodiment, an air cylinder is disposed between the material supporting plate 212 and the base 211 to realize lifting of the material supporting plate 212 relative to the base 211; the horizontal pushing mechanism is also an air cylinder. In some embodiments, the cylinder may be a hydraulic cylinder or an electric telescopic rod.

In the present embodiment, referring to fig. 2 and 3, the power unit described above includes a motor 221 and a rotating shaft 222. Wherein, the motor 221 is fixedly arranged on the base 211, and the rotating shaft 222 is coaxial with and fixedly connected with a motor shaft of the motor 221, so that the motor 221 can drive the rotating shaft 222 to rotate. The transfer member includes a plurality of material turning arms 223, and each material turning arm 223 is disposed on the rotating shaft 222 along an axial direction of the rotating shaft 222 at intervals, and is opposite to an interval between two adjacent frames 110.

The above-mentioned material turning arms 223 have the same structure, and this embodiment will be described by taking one of them as an example, and referring to fig. 3, the material turning arm 223 of this embodiment includes a housing 224, a sun gear 225, and two material supporting members 226; wherein, the middle part of the casing 224 is fixedly sleeved on the rotating shaft 222. Two mounting shafts 227 are rotatably provided on the housing 224, and the two mounting shafts 227 are provided on opposite sides of the rotation shaft 222.

Referring to fig. 3 and 4, the two material supporting members 226 are respectively plate-shaped, and are correspondingly fixed and sleeved on one ends of the two mounting shafts 227 located outside the housing 224, square material supporting grooves 201 are respectively formed in one side edge of the two material supporting members 226, and first gears 228 are respectively fixed and sleeved on one ends of the two mounting shafts 227 located inside the housing 224.

The sun gear 225 is disposed in the housing 224 and is coaxial with the rotating shaft 222, and the sun gear 225 is fixed to the base 211 via a fixed shaft 2251 extending out of the housing 224. A plurality of intermediate shafts 230 are respectively arranged between the fixed shaft 2251 and the two mounting shafts 227 at intervals, each intermediate shaft 230 is respectively and rotatably arranged on the shell 224, a second gear 231 is respectively and fixedly sleeved on each intermediate shaft 230, and the sun gear 225, the second gears 231 on each side and the corresponding first gears 228 are sequentially meshed.

Based on the above structure, when the motor 221 drives the rotating shaft 222 to rotate, the shell 224 and the two material supporting members 226 are driven to rotate around the axis of the rotating shaft 222; since the sun gear 225 is fixed, each of the second gear 231 and the first gear 228 rotates around its own axis while revolving around the sun gear 225. By setting the gear ratio of the sun gear 225 to the first gear 228, the opening of the stock chest 201 thereon can be always directed upward by rotation when the two stock pieces 226 revolve around the rotation shaft 222.

With the above structure, when the motor 221 drives the rotating shaft 222 to rotate, the two supporting members 226 on each turning arm can alternately rotate below the middle rotating surface 214 and above the conveying roller 120, and after that, when the two supporting members 226 continue to rotate, the steel pipe 500 on the middle rotating surface 214 can be supported, and the steel pipe 500 is placed on the conveying roller 120, so as to complete the transfer of the steel pipe 500 from the material rack 210 to the conveying mechanism 100.

In some embodiments, the steel pipes 500 may be placed one by one on each of the conveying rollers 120 using a robot capable of moving horizontally and vertically, but the speed of moving and gripping the steel pipes 500 is slow compared to the scheme of the present embodiment.

Referring to fig. 1 and 5, the intermediate frequency heating mechanism 300 of the present embodiment includes a base 310, a power device 311 and two intermediate frequency heating furnaces 312, the inner diameters of the two intermediate frequency heating furnaces 312 are respectively different, and the power device 311 and the two intermediate frequency heating furnaces 312 are respectively provided on the base 310, and the two intermediate frequency heating furnaces 312 can be respectively pushed by the power device 311 to move on the base 310, so that one of the two intermediate frequency heating furnaces 312 moves to be opposite to the conveying mechanism 100 and a painting mechanism 400 described below.

In a specific structure, referring to fig. 5, a sliding seat 313 is slidably disposed on a base 310, a sliding direction of the sliding seat 313 is perpendicular to a moving direction of a steel pipe 500, the two intermediate frequency heating furnaces 312 are both fixedly disposed on the sliding seat 313, the power device 311 is a cylinder disposed on the base 310, and a telescopic end of the power device is connected with the sliding seat 313, so as to drive the sliding seat 313 and the two intermediate frequency heating furnaces 312 thereon to reciprocate along a direction perpendicular to the moving direction of the steel pipe 500, so that an input port of one of the two intermediate frequency heating furnaces 312 is opposite to the steel pipe 500.

In this embodiment, by setting the intermediate frequency heating mechanism 300, when the steel pipe paint spraying production line sprays paint on steel pipes 500 with different pipe diameters, the steel pipes 500 can be heated by using intermediate frequency heating furnaces 312 with different specifications, so that a better heating effect can be achieved on the steel pipes 500.

In some embodiments, the intermediate frequency heating furnace 312 may be three, four or more.

Referring to fig. 1, 6 and 7, the paint spraying mechanism 400 of the present embodiment includes a case 410, an outer paint spraying unit, and an inner paint spraying unit. Wherein, the box 410 has a paint spraying passage penetrating the box 410 for the steel pipe 500 to pass through; the painting tunnel is opposite to the conveyor between the intermediate frequency heating mechanism 300 and the painting mechanism 400.

The outer paint spraying unit comprises a paint supplying device and a plurality of first paint spraying heads 420 which are arranged in a paint spraying channel and connected with the paint supplying device, and the first paint spraying heads 420 are arranged at intervals along the circumference of a moving path of the steel pipe 500 in the paint spraying channel.

With this structure, each of the first paint spray heads 420 can spray paint on the outer wall surface of the steel pipe 500 when the steel pipe 500 passes through the paint spray passage. It should be noted that, the paint spraying device, each first paint spraying head 420, and the connection between the paint spraying device and each first paint spraying head 420 may refer to the prior art, and the structure thereof will not be described in detail herein, and the paint supplying device is not shown in the drawings of the embodiment because it does not affect understanding.

Referring to fig. 7, the inner paint spraying unit of the present embodiment includes a mounting bar 430, two support members, and a plurality of second paint spraying heads; each second paint spray head is respectively disposed on the mounting rod 430 and located in the case 410, and a second joint 431 is disposed at an input end of each second paint spray head. The two support assemblies are respectively arranged at two ends of the mounting rod 430, at least one support assembly is provided with a plurality of first connectors 451 which are opposite to the second connectors 431 one by one, each first connector 451 is connected with the output end of the paint supply device, the two support assemblies can respectively fix the mounting rod 430 or separate from the mounting rod 430, and each first connector 451 is connected with or separated from the corresponding second connector 431 along with the corresponding support assembly.

For ease of understanding, the two support assemblies are referred to as a first support assembly 440 and a second support assembly 450, respectively, and the two ends of the mounting rod 430 are referred to as a first end and a second end, respectively, in this embodiment, where the first end is an end of the mounting rod 430 near the intermediate frequency heating mechanism 300; the present embodiment will be described by taking an example in which each of the first connectors 451 is disposed on the second supporting member 450, respectively.

Based on the above structure, when the steel pipe 500 is ready to enter the box 410, the first supporting component 440 is separated from the first end of the mounting rod 430, the second supporting component 450 fixes the second end of the mounting rod 430, at this time, the first end of the mounting rod 430 is suspended, the first connector 451 is connected with the corresponding second connector 431, and the paint supplying device can supply paint to each second paint spraying head; as the steel pipe 500 enters the box 410, the steel pipe 500 is sleeved on the mounting rod 430 from the first end of the mounting rod 430, and the paint supply device sprays paint on the inner wall of the steel pipe 500 through each second paint spray head.

When each second spray head completes the spraying of the inner wall of the steel pipe 500, the steel pipe 500 also completely passes over the first end of the installation pole 430 and approaches the second end of the installation pole 430. At this time, the first end of the steel pipe 500 may be fixed by the first supporting component 440, and the second supporting component 450 may be separated from the second end of the steel pipe 500, so that the second end of the installation rod 430 may be suspended, and the steel pipe 500 may be removed from the second end of the installation rod 430 as the steel pipe 500 continues to move.

In summary, the inner spray painting unit of the present embodiment alternately suspends both ends of the installation bar 430 by alternately supporting and separating the two support members from the corresponding ends of the installation bar 430, so that the steel pipe 500 can be sleeved into one end of the installation bar 430 and removed from the other end of the installation bar 430, and in this process, the spray painting of the inner wall of the steel pipe 500 can be completed by the second spray painting head. It should be noted that, since it does not affect understanding, each second paint head is not shown in the drawings of the present embodiment.

On the basis of the above inventive concept, the present embodiment further provides a preferred support assembly, and in a specific structure, referring to fig. 8, the two support assemblies respectively include a driving device and a clamping device; the clamping device comprises two clamping pieces 452 which are respectively arranged at two opposite sides of the mounting rod 430, the two clamping pieces 452 are respectively provided with a first wedge surface 453, the two first wedge surfaces 453 are arranged in a V shape, and a support fixed relative to the box body 410 is provided with two corresponding second wedge surfaces 454 which are jointed with the two first wedge surfaces 453; when the two clamping members 452 are driven by the driving device to move along the axial direction of the mounting rod 430, the two clamping members 452 can be close to each other to clamp the mounting rod 430 by pushing the second wedge surface 454 to the first wedge surface 453.

In this embodiment, a T-shaped block is provided on the second wedge surface 454, and a T-shaped groove 401 adapted to the T-shaped block is provided on the first wedge surface 453, so as to maintain the fit between the first wedge surface 453 and the second wedge surface 454 when the first wedge surface 453 moves relative to the second wedge surface 454.

Referring to fig. 9, the driving device of the present embodiment includes a cylinder and a driving rod 460, wherein the driving rod 460 can be driven by the cylinder to move along the axial direction of the mounting rod 430, and two elongated holes 461 are provided on the driving rod 460, and the length direction of the two elongated holes 461 is perpendicular to the moving direction of the driving rod 460; the two clamping members 452 are respectively provided with a push-supporting rod 4521, and the push-supporting rods 4521 on the two clamping members 452 correspondingly pass through the two strip holes 461.

In this embodiment, by providing the driving device, when the cylinder pushes the driving rod 460 along the axial direction of the mounting rod 430, the driving rod 460 drives the two clamping members 452 to move along the axial direction of the mounting rod 430, and the two clamping members 452 will approach each other until they clamp the mounting rod 430 along with the pushing of the second wedge surface 454 to the first wedge surface 453. When the cylinder drives the drive rod 460 in the reverse direction, the two clamping members 452 will move away.

Referring to fig. 8, the clamping member 452 of the present embodiment includes a clamping block 455 and a mounting block 456 slidably disposed on the clamping block 455, and a first elastic member 457 is disposed between the clamping block 455 and the mounting block 456, and a first wedge 453 is disposed on the clamping block 455, and a first joint 451 is disposed on the mounting block 456.

Based on the above structure, in the process that the driving device drives the two clamping members 452 to clamp the mounting bar 430, under the pushing of the first elastic member 457, the mounting block 456 moves synchronously with the clamping block 455 first until the clamping block 455 clamps the mounting bar 430, after that, the movement of the mounting block 456 will be stopped due to the resistance of the clamping block 455, and the mounting block 456 is still pushed by the driving device, at this time, the mounting block 456 compresses the first elastic member 457, so that the mounting block 456 has the movement along the axial direction of the mounting bar 430 relative to the clamping block 455, and the first connector 451 on the mounting block 456 can be connected with the second connector 431 on the mounting bar 430.

In the present embodiment, referring to fig. 10 and 11, a slider 458 is provided on a mounting block 456, and second elastic members 459 are provided between the mounting block 456 and two opposite sides of the slider 458 parallel to the axial direction of the mounting rod 430, respectively, and a first joint 451 is provided on the slider 458; the mounting rod 430 is provided with a positioning structure located in front of the second joint 431, and when the mounting block 456 drives the first joint 451 to be connected with the second joint 431, the positioning structure can push the floating block 458 to enable the first joint 451 to be opposite to the second joint 431.

In this embodiment, the slider 458 is provided, so that the first joint 451 and the second joint 431 can be preferably connected to each other; specifically, if the first connector 451 is fixedly disposed on the mounting block 456, the first connector 451 will not be properly aligned with the second connector 431 as the clamp block 455 wears, requiring frequent adjustment of the position of the first connector 451 on the mounting block 456.

In this embodiment, the slider 458 is provided on the mounting block 456; and a positioning structure positioned in front of the second joint 431 is arranged on the mounting rod 430, and before the first joint 451 and the second joint 431 are butted, the positioning structure can be used for positioning the floating block 458, so that the first joint 451 and the second joint 431 are aligned well, and the first joint 451 and the second joint 431 are butted well.

Referring to fig. 8, the positioning structure of the present embodiment is a V-shaped groove 402 provided on the mounting rod 430, and a V-shaped block adapted to the V-shaped groove 402 is provided on the slider 458.

In some embodiments, two air cylinders may be provided corresponding to the two clamping members 452, so that the two clamping members 452 are correspondingly driven to clamp or unclamp the mounting bar 430 by the two air cylinders. However, compared with the solution of the present embodiment, when two cylinders are provided to push the two clamping members 452, in order to connect the first joint 451 and the second joint 431, one cylinder needs to be provided on each clamping member 452 to push the first joint 451, which makes the structure of the support assembly more complex, and in the solution of the present embodiment, only one cylinder is needed for each support assembly. The structure is simpler, and the control difficulty is low.

Overall, the overall working process of the steel pipe paint spraying production line of this embodiment is:

A bundle of steel pipes 500 stacked in a square shape is placed on the pallet 212 by a worker;

The material supporting plate 212 automatically rises to enable the top-layer steel pipe 500 to be higher than the reference surface on the material frame 210, then the horizontal pushing mechanism pushes the top-layer steel pipe 500, one top-layer steel pipe 500 slides onto the transfer surface 214 through the inclined surface 213, and the material turning arm 223 transfers the steel pipe 500 onto each conveying roller 120 along with the continuous rotation of the material turning arm 223;

The conveying mechanism 200 firstly conveys the steel pipe 500 to the medium-frequency heating mechanism 300 for heating;

Before the heated steel pipe 500 is conveyed to the paint spraying mechanism 400, the first end, close to the intermediate frequency heating mechanism 300, of the mounting rod 430 is firstly suspended, so that the steel pipe 500 can be sleeved on the mounting rod 430 and continuously slide, the outer wall surface of the steel pipe 500 is sprayed with each first paint spraying head 420 in a paint spraying channel, and the inner wall of the steel pipe 500 is sprayed with each second paint spraying head on the mounting rod 430; after the steel pipe 500 completely spans the first end of the installation rod 430 and painting of the inner wall of the steel pipe 500 is completed, the first supporting component 440 fixes the first end of the installation rod 430, and the second supporting component 450 is separated from the second end of the installation rod 430, so that the second end of the installation rod 430 is suspended, and the steel pipe 500 can be removed from the second end of the installation rod 430.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. A steel pipe paint spraying production line comprising a paint spraying mechanism (400), characterized in that the paint spraying mechanism (400) comprises:

A box body (410) provided with a paint spraying channel penetrating through the box body (410) for a steel pipe (500) to pass through;

the outer paint spraying unit comprises a paint supply device and a plurality of first paint spraying heads (420), each first paint spraying head (420) is arranged in the paint spraying channel and connected with the paint supply device, and each first paint spraying head (420) is arranged at intervals along the circumferential direction of the moving path of the steel pipe (500) in the paint spraying channel;

The inner paint spraying unit comprises a mounting rod (430), two support assemblies and a plurality of second paint spraying heads; each second paint spraying head is respectively arranged on the mounting rod (430), and a second joint (431) is arranged at the input end of each second paint spraying head; the two support components are respectively arranged at two ends of the mounting rod (430), at least one support component is provided with a plurality of first connectors (451) which are opposite to the second connectors (431) one by one, and each first connector (451) is connected with the output end of the paint supply device; the two support assemblies can respectively fix the mounting rod (430) or separate from the mounting rod (430), and each first joint (451) is connected with or separated from the corresponding second joint (431) along with the corresponding support assembly;

The two supporting components can be alternately fixed and separated from the corresponding ends of the mounting rod (430), so that the two ends of the mounting rod (430) are alternately suspended, the steel pipe (500) can be movably sleeved on one end of the mounting rod (430) and removed from the other end of the mounting rod (430), and the inner wall of the steel pipe (500) is sprayed with paint by each second paint spraying head.

2. The steel pipe paint spraying production line according to claim 1, wherein the two support assemblies respectively comprise a driving device and a clamping device; the clamping device comprises two clamping pieces (452) which are respectively arranged at two opposite sides of the mounting rod (430), first wedge surfaces (453) are respectively arranged on the two clamping pieces (452), and the two first wedge surfaces (453) are arranged in a V shape; the device also comprises two second wedge surfaces (454) which are fixed relative to the box body (410) and are correspondingly attached to the two first wedge surfaces (453); when the two clamping pieces (452) are driven by the driving device to move along the axial direction of the mounting rod (430), the two clamping pieces (452) can be close to each other to clamp the mounting rod (430) through the pushing of the second wedge surface (454) to the first wedge surface (453).

3. The steel pipe paint spraying production line according to claim 2, wherein the two clamping members (452) respectively comprise a clamping block (455) and a mounting block (456) slidably arranged on the clamping block (455), a first elastic member (457) is arranged between the clamping block (455) and the mounting block (456), the first wedge surface (453) is arranged on the clamping block (455), and the first joint (451) is arranged on the mounting block (456);

When the driving device drives the two clamping pieces (452) to clamp the mounting rod (430), the mounting block (456) moves synchronously with the clamping blocks (455) to enable the clamping blocks (455) to clamp the mounting rod (430), and then the first elastic piece (457) is compressed to move relative to the clamping blocks (455) to enable the first connector (451) to be connected with the corresponding second connector (431).

4. A steel pipe paint spraying production line according to claim 3, wherein the driving device comprises a cylinder and a driving rod (460), the driving rod (460) can be driven by the cylinder to move along the axial direction of the mounting rod (430), two strip holes (461) are formed in the driving rod (460), and the length directions of the two strip holes (461) are perpendicular to the moving direction of the driving rod (460); the two mounting blocks (456) are respectively provided with a push-supporting rod (4521), and the push-supporting rods (4521) on the two mounting blocks (456) correspondingly penetrate through the two strip holes (461).

5. A steel pipe painting line according to claim 3, characterized in that said mounting block (456) is provided with a slider (458), two opposite sides of said slider (458) parallel to the axial direction of said mounting rod (430) and between said mounting block (456) are respectively provided with a second elastic member (459), said first joint (451) being provided on said slider (458);

The mounting rod (430) is provided with a positioning structure positioned in front of the second joint (431), and when the mounting block (456) drives the first joint (451) to be connected with the second joint (431), the positioning structure can push the floating block (458) to enable the first joint (451) to be opposite to the second joint (431).

6. The steel pipe paint spraying production line according to any one of claims 1 to 5, further comprising a conveying mechanism (100) positioned in front of the paint spraying mechanism (400), and a feeding mechanism (200) provided on one side of the conveying mechanism (100); the conveying mechanism (100) comprises a plurality of frames (110) which are arranged at intervals along the moving direction of the steel pipe (500), and a plurality of conveying rollers (120) are rotatably arranged on each frame (110); the feeding mechanism (200) comprises a material rack (210), a power unit and a transfer piece, wherein the transfer piece is driven by the power unit, and the transfer piece can move the steel pipe (500) from the material rack (210) to each conveying roller (120).

7. The steel pipe painting production line according to claim 6, characterized in that the rack (210) comprises a base (211) and a pallet (212); the material supporting plate (212) is arranged on the base (211) in a lifting manner and is used for placing square stacked steel pipes (500); the base (211) is provided with a reference surface, a middle rotating surface (214) lower than the reference surface and an inclined surface (213) connecting the reference surface and the middle rotating surface (214), and the base (211) is provided with a horizontal pushing mechanism;

The material supporting plate (212) can be lifted to enable the steel pipe (500) on the top layer to be higher than the reference surface, and the horizontal pushing mechanism can push the steel pipe (500) on the top layer, so that the steel pipe (500) on the top layer slides onto the transfer surface (214) one by one through the inclined surface (213).

8. The steel pipe paint spraying production line according to claim 7, wherein the power unit comprises a motor (221) and a rotating shaft (222), the motor (221) and the rotating shaft (222) are respectively arranged on the base (211), and the rotating shaft (222) can be driven to rotate by the motor (221); the transfer piece comprises a plurality of material turning arms (223), and each material turning arm (223) is arranged on the rotating shaft (222) at intervals and is opposite to the interval between two adjacent frames (110);

the material turning arm (223) comprises a shell (224), two material supporting pieces (226) and a central gear (225); the middle part of the shell (224) is fixedly sleeved on the rotating shaft (222); the two material supporting pieces (226) are respectively arranged on two opposite sides of the rotating shaft (222) and are respectively and rotatably arranged on the shell (224), and the two material supporting pieces (226) are respectively provided with a material supporting groove (201);

The central gear (225) is positioned in the shell (224), is coaxial with the rotating shaft (222) and is fixedly arranged on the base (211); a first gear (228) which is coaxially and fixedly connected with the two material supporting pieces (226) is also arranged in the shell (224), and a plurality of second gears (231) are respectively meshed between the two first gears (228) and the central gear (225) in sequence; when the rotating shaft (222) drives the shell (224) to rotate, the central gear (225) drives the first gear (228), and the material supporting grooves (201) on the two material supporting pieces (226) are kept upwards.

9. The steel pipe painting line according to claim 1, characterized by further comprising an intermediate frequency heating mechanism (300) upstream of said painting mechanism (400); the medium-frequency heating mechanism (300) comprises a base (310), a power device (311) and at least two medium-frequency heating furnaces (312), wherein the inner diameters of the medium-frequency heating furnaces (312) are respectively different; the power device (311) and the intermediate frequency heating furnaces (312) are respectively arranged on the base (310), and the intermediate frequency heating furnaces (312) can be respectively pushed by the power device (311) to move on the base (310), so that the intermediate frequency heating furnaces (312) can alternatively move to be opposite to the paint spraying mechanism (400).