CN213727402U

CN213727402U - Steel pipe paint spraying apparatus for construction

Info

Publication number: CN213727402U
Application number: CN202022757748.XU
Authority: CN
Inventors: 袁鸿健; 刘晓东
Original assignee: Ritten Construction Group Co ltd
Current assignee: Ritten Construction Group Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-07-20
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a steel pipe paint spraying apparatus for construction, including the box, box one side is the arc form. This device is through the setting of two sets of drums of constituteing by the arc steel pipe, the steel pipe is when rotating the round along with the disc, can effectual completion steel pipe spray paint and the work of drying, because three inserted bar rotates along with the motor is synchronous always, so can insert the steel pipe and take out the steel pipe through the workport is continuous during this device operation, consequently this device is applicable to the big batch work of spraying paint of steel pipe, and whole work of spraying paint goes on in the cavity of the formation between two arcs, so can effectually avoid the spraying diffusion, in order to avoid influencing operational environment, the unnecessary pigment that the steel pipe process of spraying paint produced, along the steel pipe, arc and the arc cover body drip on the disc, the pigment that drips on the disc falls in the box along with its toper face stream, and then unnecessary pigment also can supply the interior pigment cyclic utilization of box, the effectual waste of avoiding pigment.

Description

Steel pipe paint spraying apparatus for construction

Technical Field

The utility model relates to a construction field, concretely relates to steel pipe paint spraying apparatus for construction.

Background

The steel pipe for the building can be divided into seamless steel pipe and seamed steel pipe according to having the seam to be seamless, and seamed steel pipe divide into spiral steel pipe and straight seam steel pipe again according to the difference of welding seam, and the two is piled in the building, and the structure, the steel construction, the bearing, the aspect such as drainage is used very generally, and the material mainly has carbon steel, stainless steel, alloy steel, and wherein carbon steel material uses most generally, and the seamless steel pipe of building can divide into according to production method: hot rolling seamless pipes, cold drawn pipes, precision steel pipes, hot expanded pipes, cold spun pipes, extruded pipes, etc., and hot rolled pipes are used in many construction industries. Wherein the japanning work of building steel pipe is mostly manual operation at present, it is wasted time and energy, and operational environment is poor, be unfavorable for staff's healthy, and there is the inhomogeneous condition of spraying paint, and the spraying paint can lead to a large amount of wastes of paint, and the spraying diffusion area is big, to the environment, the human injury is great, and the steel pipe after the spary is because the spary feed liquid is more, the feed liquid of steel pipe outside spary can flow its bottom position along the outer arcwall face of steel pipe, feed liquid not only can drip subaerial polluted environment like this, feed liquid also can present the convex solidification in its bottom simultaneously, can seriously influence the spary effect like this, and at present, the steel pipe of having spouted the lacquer is mostly natural drying, the pigment solidification shaping speed of steel pipe on the surface spraying is slow, the steel pipe of having spouted the lacquer can not use immediately, seriously influence the job progress.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of the existence, the utility model provides a steel pipe paint spraying apparatus for construction.

The utility model discloses a realize through following technical scheme:

a steel pipe paint spraying device for building construction comprises a box body, wherein one side of the box body is arc-shaped, a working opening is formed in the arc-shaped side wall of the box body, a PLC (programmable logic controller) is fixedly installed at the other side of the box body, a discharging pipe is fixedly connected with the bottom end of the side wall of the box body and is communicated with a cavity inside the box body, a valve is fixedly arranged on the discharging pipe, a motor is fixedly installed at one side of the top surface of the box body, an output shaft of the motor penetrates through the top surface of the box body and extends into the box body, a rotating shaft is fixedly connected with a deep groove ball bearing, the deep groove ball bearing is fixedly embedded in the bottom surface inside the box body, a disc is fixedly sleeved on the rotating shaft, the top surface of the disc is arranged in a conical shape, three insert rods are fixedly arranged on the top surface of the disc uniformly by taking a rotating shaft axis as a center, and limit rings are fixedly sleeved on the three insert rods, a plurality of stirring blades are uniformly fixed on the outer ring surface of the disc, a partition plate is arranged on one side of the disc, the bottom end of the partition plate is fixedly connected with the inner bottom end of the box body in a sealing manner, two ends of the partition plate are fixedly connected with the inner walls of two sides of the box body in a sealing manner respectively, a mounting plate is arranged at the side end of the partition plate, the top end and the bottom end of the mounting plate are fixedly connected with the inner top end and the inner bottom end of the box body respectively, a fan and a material pumping pump are arranged between the mounting plate and the partition plate, the fan and the material pumping pump are fixedly mounted on the inner bottom end of the box body, a three-way pipe is fixedly connected to the discharge port of the material pumping pump, a connecting pipe is fixedly connected to the material suction port of the material pumping pump, the other end of the connecting pipe penetrates through the partition plate and is fixedly connected with the contact part of the partition plate in a sealing manner, a first three-way pipe is fixedly connected to the exhaust port of the fan, a first connecting pipe is fixedly connected to the air inlet of the fan, and the other end of the first connecting pipe penetrates through the inner wall of the box body and extends out of the box body, the first connecting pipe is fixedly connected with a contact part of the box body, an electric telescopic rod is fixedly arranged on the side wall of the mounting plate, the telescopic end of the electric telescopic rod penetrates through the mounting plate and is fixedly connected with a transverse plate, vertical rods are respectively fixed at two ends of the top surface of the transverse plate, sleeves are respectively fixed at the top ends of the two vertical rods, a sliding rod is respectively sleeved in the two sleeves in a sliding manner, one end of each sliding rod penetrates through the mounting plate and is fixedly provided with a stop block, the sliding rod is slidably connected with the contact part of the mounting plate, a check ring is fixedly sleeved on the sliding rod and is arranged between the sleeve and the mounting plate, a spring is fixedly arranged between the check ring and the mounting plate, the spring is sleeved on the sliding rod, the other end of the two sliding rods is respectively fixed with a first transverse plate, L-shaped connecting rods are respectively hinged at two ends of the bottom surface of the first transverse plate through pins, and the two L-shaped connecting rods hinged at two ends of each first transverse plate form a group, one end of each group of two L-shaped connecting rods is respectively articulated with a connecting plate through a pin, the other end of each group of two connecting plates is respectively articulated with a connecting block through a pin, the two connecting blocks are respectively and fixedly arranged at the two sides of the sleeve, the other end of each group of two L-shaped connecting rods is respectively fixed with an arc plate, the two arc plates at the side end of each first transverse plate are a group, the two arc plates of each group can be spliced to form a complete cylinder, the inner arc surfaces of the two arc plates of each group are both fixed with arc cover bodies, the bottom of each arc cover body is fixedly provided with a connecting port, wherein the connecting ports at the bottoms of the two cover bodies in one group of the two arc-shaped plates are respectively communicated with the three-way pipe through hoses, the connecting ports at the bottoms of the two cover bodies in the other group of the two arc-shaped plates are respectively communicated with the first three-way pipe through hoses, the inner arc surface of the cover body is uniformly and fixedly provided with a plurality of spray heads, and the spray heads are communicated with the inner cavity of the cover body.

Preferably, the motor, the fan, the material pumping pump, the electric telescopic rod and the PLC are respectively electrically connected with an external power supply through wires.

Preferably, the motor, the fan, the electric telescopic rod and the material pumping pump are respectively electrically connected with the PLC through leads.

Compared with the prior art, the beneficial effects of the utility model are that: the device can effectively finish the work of steel pipe painting and drying when the steel pipe rotates for one circle along with the disc through the arrangement of two groups of cylinders consisting of arc-shaped plate steel pipes, and because three insertion rods always rotate synchronously along with a motor, the device can continuously insert and take out the steel pipe through a working port during the operation, so the device is suitable for the large-batch painting work of the steel pipe, because the stirring blades are arranged on the outer ring surface of the disc, the pigment added in the box can be stirred through the stirring blades when the disc rotates, the solidification of the pigment in the box is effectively prevented, the whole painting work is carried out in a cavity formed between two arcs, and the two arc-shaped plates are also arranged in the box, so the spraying diffusion can be effectively avoided, the working environment is not influenced, the redundant pigment generated in the process of painting the steel pipe drops on the disc along the steel pipe, the arc-shaped plates and the arc-shaped cover body, the pigment dropping on the disc falls into the box body along with the conical surface flow of the disc, and then the redundant pigment can be recycled by the pigment in the box body, so that the pigment waste is effectively avoided.

Drawings

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

FIG. 2 is a top view of the structure of FIG. 1 according to the present invention;

fig. 3 is a schematic view of the structure of the present invention.

In the figure: the device comprises a box body 1, a working opening 2, a motor 3, a rotating shaft 4, a deep groove ball bearing 5, a disc 6, an inserting rod 7, a limiting ring 8, a stirring blade 9, a partition plate 10, a mounting plate 11, a discharging pipe 12, a material pumping pump 13, a connecting pipe 14, a three-way pipe 15, a fan 16, a first connecting pipe 17, a first three-way pipe 18, an electric telescopic rod 19, a transverse plate 20, a vertical rod 21, a sleeve 22, a connecting plate 23, an L-shaped connecting rod 24, a first transverse plate 25, a sliding rod 26, a stop block 27, a check ring 28, a spring 29, a PLC (programmable logic controller) 30, a connecting block 31, an arc-shaped plate 32, an arc-shaped cover body 33 and a spray head 34.

Detailed Description

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

as shown in fig. 1, 2 and 3, a steel pipe paint spraying device for building construction comprises a box body 1, wherein one side of the box body 1 is arc-shaped, a working opening 2 is formed in the arc-shaped side wall of the box body 1, a PLC (programmable logic controller) 30 is fixedly installed on the other side of the box body 1, a discharge pipe 12 is fixedly connected to the bottom end of the side wall of the box body 1, the discharge pipe 12 is communicated with the inner cavity of the box body 1, a valve is fixedly arranged on the discharge pipe 12, a motor 3 is fixedly installed on one side of the top surface of the box body 1, an output shaft of the motor 3 penetrates through the top surface of the box body 1 and extends into a rotating shaft 4 fixedly connected with the box body 1, a deep groove ball bearing 5 is fixedly sleeved at the bottom end of the rotating shaft 4, the deep groove ball bearing 5 is fixedly embedded on the inner bottom surface of the box body 1, a disc 6 is fixedly sleeved on the rotating shaft 4, the top surface of the disc 6 is arranged in a conical shape, three inserting rods 7 are fixedly arranged on the top surface of the disc 6 by taking the axis line of the rotating shaft 4 as the center, a limiting ring 8 is fixedly sleeved on each of the three inserting rods 7, a plurality of stirring blades 9 are uniformly fixed on the outer ring surface of the disc 6, a partition plate 10 is arranged on one side of the disc 6, the bottom end of the partition plate 10 is fixedly connected with the inner bottom end of the box 1 in a sealing manner, two ends of the partition plate 10 are fixedly connected with the inner walls of two sides of the box 1 in a sealing manner, a mounting plate 11 is arranged at the side end of the partition plate 10, the top end and the bottom end of the mounting plate 11 are fixedly connected with the inner top end and the inner bottom end of the box 1 respectively, a fan 16 and a material pump 13 are arranged between the mounting plate 11 and the partition plate 10, the fan 16 and the material pump 13 are both fixedly mounted on the inner bottom end of the box 1, a three-way pipe 15 is fixedly connected to the discharge port of the material pump 13, a connecting pipe 14 is fixedly connected to the suction port of the material pump 13, the other end of the connecting pipe 14 penetrates through the partition plate 10 and is fixedly connected with the contact portion of the partition plate in a sealing manner, a first three-way pipe 18 is fixedly connected to the discharge port of the fan 16, fixedly connected with first connecting pipe 17 on fan 16's the air intake, the first connecting pipe 17 other end pierces through box 1 inner wall and stretches out the box 1 outside, first connecting pipe 17 and box 1 contact department fixed connection, fixed mounting has electric telescopic handle 19 on the mounting panel 11 lateral wall, electric telescopic handle 19's flexible end pierces through mounting panel 11 fixedly connected with diaphragm 20, diaphragm 20 top surface both ends department is fixed with montant 21 respectively, and two montant 21 tops are fixed with sleeve 22 respectively, and it has slide bar 26 to slide respectively in two sleeves 22, and two slide bar 26 one ends all pierce through mounting panel 11 and are fixed with dog 27, slide bar 26 and mounting panel 11 contact department sliding connection, fixed cover has retaining ring 28 on slide bar 26, retaining ring 28 sets up between sleeve 22 and mounting panel 11, be equipped with spring 29 between retaining ring 28 and the mounting panel 11, the spring 29 is sleeved on the sliding rods 26, the other ends of the two sliding rods 26 are respectively fixed with a first transverse plate 25, two ends of the bottom surface of the first transverse plate 25 are respectively hinged with an L-shaped connecting rod 24 through a pin, two L-shaped connecting rods 24 hinged with two ends of each first transverse plate 25 are in a group, one end of each group of two L-shaped connecting rods 24 is respectively hinged with a connecting plate 23 through a pin, the other end of each group of two connecting plates 23 is respectively hinged with a connecting block 31 through a pin, the two connecting blocks 31 are respectively and fixedly arranged at two sides of the sleeve 22, the other end of each group of two L-shaped connecting rods 24 is respectively fixed with an arc-shaped plate 32, two arc-shaped plates 32 at the side end of each first transverse plate 25 are in a group, the two arc-shaped plates 32 in each group can be spliced to form a complete cylinder, an arc-shaped cover body 33 is fixed on the inner arc-shaped surface of each group of two arc-shaped plates 32, and a connecting port is fixed at the bottom of the arc-shaped cover body 33, the connectors at the bottoms of the two cover bodies 33 in one group of the two arc-shaped plates 32 are respectively communicated with the three-way pipe 15 through hoses, the connectors at the bottoms of the two cover bodies 33 in the other group of the two arc-shaped plates 32 are respectively communicated with the first three-way pipe 18 through hoses, a plurality of spray heads 34 are uniformly and fixedly arranged on the inner arc surfaces of the cover bodies 33, and the spray heads 34 are communicated with the inner cavity of the cover bodies 33.

The motor 3, the fan 16, the material pumping pump 13, the electric telescopic rod 19 and the PLC 30 are respectively electrically connected with an external power supply through wires.

The motor 3, the fan 16, the electric telescopic rod 19 and the material pumping pump 13 are respectively electrically connected with the PLC 30 through leads.

The working principle is as follows: the utility model relates to a steel pipe paint spraying apparatus for construction is in the use, at first as shown in figure 1, at first pour the pigment of usefulness of spraying paint into box 1 through work port 2 into, the pigment of being poured into in box 1 can be in box 1 between baffle 10 and work port 2 under the effect of blockking of baffle, stop feeding after adding the pigment liquid level to the half height of baffle 10 like this, start motor 3, fan 16 and pump 13 simultaneously afterwards, because motor 3, fan 16, electric telescopic handle 19 and pump 13 all with PLC controller 30 electric connection, so can the effectual control motor 3 of PLC controller 30, fan 16, electric telescopic handle 19 and pump 13 operation process, when motor 3 moves, its output shaft can be under PLC controller 30's control each time the equidirectional 120 intermittent type motion of corner, and when motor 3's output shaft just pauses, the telescopic end of the electric telescopic rod 19 will extend under the control of the PLC controller 30, when the telescopic end of the electric telescopic rod 19 extends, the transverse plate 20 will drive the two sleeves 22 to move toward the rotating shaft 4, when the two sleeves 22 move toward the rotating shaft 4, the spring 29, which is originally in a compressed state, will push the retainer ring 28, so that the attached sleeve 22 will move synchronously with the moving direction of the sleeve 22, and when the retainer ring 28 moves, the slide bar 26 will be driven to move synchronously, when the stop 27 at the side end of the slide bar 26 is attached to the side wall of the mounting plate 11, the retainer ring 28 will stop moving, and at the same time, the slide bar 26 will also stop moving, at this time, along with the extension of the telescopic end of the electric telescopic rod 19, the two sleeves 22 will push the four L-shaped connecting rods 24 synchronously through the two connecting plates 23 at the two sides thereof, and at this time, each set of two L-shaped connecting rods 24 will rotate with the hinged position with the first transverse plate 25 as the axis, thus, the two L-shaped connecting rods 24 can drive the two corresponding arc plates 32 to approach each other, when the telescopic end of the electric telescopic rod 19 extends to the maximum degree, the two arc plates 32 of the same group are tightly attached to each other and form a complete cylinder, and at the moment, the two groups of cylinders formed by the arc plates 32 are respectively sleeved on the two inserting rods 7 in the deep part of the box body 1, after the two groups of cylinders formed by the arc plates 32 are respectively sleeved on the two inserting rods 7 in the deep part of the box body 1, namely, when the telescopic end of the electric telescopic rod 19 extends to the maximum degree, the fan 16 and the material pump 13 can immediately operate under the control of the PLC controller 30, when the fan 16 operates, the external air can be absorbed by the fan 16 far away and continuously, and the external air is continuously fed into the two arc cover bodies 33 in the two arc plates 32 of the same group through the first three-way pipe 18 and the hoses connected to the two sides of the first three-way pipe 18, the air entering the two arc-shaped shields 33 is blown out into the cavity formed between the two arc-shaped shields 33 through the plurality of spray nozzles 34, so that the air circulation in the cavity formed between the two arc-shaped shields 32 of the same group is accelerated, when the material pumping pump 13 runs, the pigment in the box body 1 is sucked through the connecting pipe 14, the pigment is sent into the two arc-shaped shields 33 in the other two arc-shaped shields 32 through the three-way pipe 15 and the hoses connected to the two sides of the three-way pipe 15, the pigment entering the two arc-shaped shields 33 is sprayed out into the cavity formed between the two arc-shaped shields 33 through the plurality of spray nozzles 34, so that the running time of the fan 16 and the material pumping pump 13 is continued until the next running of the motor 3, before the next running work of the motor 3 is started, the fan 16 and the material pumping pump 13 are rapidly stopped under the control of the PLC 30, and then the telescopic end of the electric telescopic rod 19 is immediately retracted to the original position under the control of the PLC 30, at this time, the two arc plates 32 of each group are opened again and returned to the original position (as shown in fig. 3), and when the motor 3 operates again, the fan 16, the electric telescopic rod 19 and the material pumping pump 13 repeat the above working process all the time. The staff inserts the steel pipe that needs to spray paint to the inserted link 7 nearest to the working port 2 through the pause gap of the motor 3, the bottom end of the steel pipe inserted to the inserted link 7 is supported by the limiting ring 8, the steel pipe rotates along with the disc 6 along with the intermittent operation of the motor 3, when the motor 3 stops for the first time, the steel pipe can be sleeved by a group of two arc-shaped plates 32, two arc-shaped cover bodies 33 in the group of two arc-shaped plates 32 are communicated with the arc-shaped cover bodies 33, and further when the motor 3 stops for the first time, the steel pipe can be sprayed paint, because the whole paint spraying work is carried out in the group of two arc-shaped plates 32, and the group of two arc-shaped plates 32 are also arranged in the box body 1, the spray diffusion can be effectively avoided, so as to avoid influencing the working environment, redundant pigment generated in the paint spraying process of the steel pipe drops on the disc 6 along with the steel pipe, the arc-shaped plates 32 and the arc-shaped cover bodies 33, when the motor 3 runs and stops for the second time, the steel pipe returns to the position just started to be placed into the box body 1, the steel pipe just rotates 360 degrees along with the disc 6 and returns to the original position, in the process, the steel pipe effectively finishes the painting and drying work, so that the steel pipe can be taken down when the steel pipe rotates a circle to the original position, and as the three inserting rods 7 always rotate synchronously along with the motor 3, the steel pipes can be continuously inserted into and removed from the working port 2 during the operation of the apparatus, so that the apparatus is suitable for mass painting of steel pipes. Due to the arrangement of the stirring blades 9 on the outer ring surface of the disc 6, the pigment added into the box body 1 can be stirred by the stirring blades 9 when the disc 6 rotates, and the solidification of the pigment in the box body 1 is effectively prevented.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A steel pipe paint spraying device for building construction comprises a box body (1), and is characterized in that; the improved automatic discharging device is characterized in that one side of the box body (1) is arc-shaped, a working opening (2) is formed in the arc-shaped side wall of the box body (1), a PLC (programmable logic controller) (30) is fixedly mounted at the other side of the box body (1), a discharging pipe (12) is fixedly connected to the bottom end of the side wall of the box body (1), the discharging pipe (12) is communicated with an internal cavity of the box body (1), a valve is fixedly arranged on the discharging pipe (12), a motor (3) is fixedly mounted at one side of the top surface of the box body (1), an output shaft of the motor (3) penetrates through the top surface of the box body (1) and extends into a rotating shaft (4) fixedly connected with the inside of the box body (1), a deep groove ball bearing (5) is fixedly sleeved at the bottom end of the rotating shaft (4), the deep groove ball bearing (5) is fixedly mounted on the internal bottom surface of the box body (1), a disc (6) is fixedly sleeved on the rotating shaft (4), and the top surface of the disc (6) is cone-shaped, the disc (6) top surface is uniformly and fixedly provided with three inserted rods (7) by taking a rotating shaft (4) axis as a center, the three inserted rods (7) are fixedly sleeved with limit rings (8), the disc (6) outer ring surface is uniformly and fixedly provided with a plurality of stirring blades (9), a partition plate (10) is arranged on one side of the disc (6), the bottom end of the partition plate (10) is fixedly connected with the inner bottom end of the box body (1) in a sealing manner, the two ends of the partition plate (10) are fixedly connected with the inner walls of the two sides of the box body (1) in a sealing manner, a mounting plate (11) is arranged at the side end of the partition plate (10), the top end and the bottom end of the mounting plate (11) are fixedly connected with the inner top end and the inner bottom end of the box body (1) respectively, a fan (16) and a material pumping pump (13) are arranged between the mounting plate (11) and the partition plate (10), and the fan (16) and the material pumping pump (13) are fixedly arranged on the inner bottom end of the box body (1), the material suction device is characterized in that a three-way pipe (15) is fixedly connected to a discharge opening of the material suction pump (13), a connecting pipe (14) is fixedly connected to a material suction opening of the material suction pump (13), the other end of the connecting pipe (14) penetrates through the partition plate (10) and is fixedly connected with a contact part of the partition plate in a sealing manner, a first three-way pipe (18) is fixedly connected to an air outlet of the fan (16), a first connecting pipe (17) is fixedly connected to an air inlet of the fan (16), the other end of the first connecting pipe (17) penetrates through the inner wall of the box body (1) and extends out of the box body (1), the contact part of the first connecting pipe (17) and the box body (1) is fixedly connected, an electric telescopic rod (19) is fixedly mounted on the side wall of the mounting plate (11), the telescopic end of the electric telescopic rod (19) penetrates through a mounting plate (11) and is fixedly connected with a transverse plate (20), and vertical rods (21) are respectively fixed at two ends of the top surface of the transverse plate (20), the top ends of the two vertical rods (21) are respectively fixed with sleeves (22), the two sleeves (22) are respectively sleeved with a sliding rod (26) in a sliding manner, one end of each sliding rod (26) penetrates through the mounting plate (11) and is fixed with a stop block (27), the sliding rods (26) are in sliding connection with the mounting plate (11), the sliding rods (26) are fixedly sleeved with check rings (28), the check rings (28) are arranged between the sleeves (22) and the mounting plate (11), springs (29) are fixedly arranged between the check rings (28) and the mounting plate (11), the springs (29) are sleeved on the sliding rods (26), the other ends of the two sliding rods (26) are respectively fixed with first transverse plates (25), two ends of the bottom surface of each first transverse plate (25) are respectively hinged with L-shaped connecting rods (24) through pins, and two hinged L-shaped connecting rods (24) at two ends of each first transverse plate (25) are a group, one end of each group of two L-shaped connecting rods (24) is respectively articulated with a connecting plate (23) through a pin, the other end of each group of two connecting plates (23) is respectively articulated with a connecting block (31) through a pin, the two connecting blocks (31) are respectively and fixedly arranged at two sides of the sleeve (22), the other end of each group of two L-shaped connecting rods (24) is respectively fixed with an arc-shaped plate (32), the two arc-shaped plates (32) at the side end of each first transverse plate (25) form a group, the two arc-shaped plates (32) in each group can be spliced to form a complete cylinder, an arc-shaped cover body (33) is respectively fixed on the inner arc surface of each group of two arc-shaped plates (32), the bottom of the arc-shaped cover body (33) is fixedly provided with a connecting port, the two cover bodies (33) in one group of two arc-shaped plates (32) are respectively communicated with the connecting port (15) through a hose, the connecting ports at the bottoms of the two cover bodies (33) in the other group of two arc-shaped plates (32) are respectively communicated with the first three-way pipe (18) through hoses, a plurality of spray heads (34) are uniformly and fixedly arranged on the inner arc surface of the cover body (33), and the spray heads (34) are communicated with the inner cavity of the cover body (33).

2. The painting device for the steel pipes for building construction according to claim 1, characterized in that: the motor (3), the fan (16), the material pumping pump (13), the electric telescopic rod (19) and the PLC (30) are respectively electrically connected with an external power supply through leads.

3. The painting device for the steel pipes for building construction according to claim 1, characterized in that: the motor (3), the fan (16), the electric telescopic rod (19) and the material pumping pump (13) are respectively electrically connected with the PLC (30) through leads.