Coating device for steel structure machining

Abstract

The utility model discloses a coating device for steel structure processing, which relates to the technical field of steel structure processing and comprises a support column, a relay conveying unit and a comprehensive spraying unit. According to the spraying device, the spraying frame is arranged between the feeding conveyor and the discharging conveyor, and the feeding conveyor and the discharging conveyor are separated by a certain distance, so that when conveyed steel structure workpieces pass through the spraying frame, all the surfaces of the outer sides of the steel structure workpieces are exposed outside; therefore, the spraying device can conduct comprehensive spraying on the steel structure workpiece, and the situation that due to the fact that a clamping component is used, local spraying cannot be conducted is avoided; a reliable comprehensive spraying unit is further arranged, the coverage range of a material spraying area can be controlled according to the size of the workpiece, and a frame-shaped structure is defined by four atomizing nozzles, so that the outer surface of the steel structure workpiece is completely covered; and the workpiece centering maintaining function is achieved, so that it is guaranteed that follow-up spraying operation is effectively conducted.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel structure processing technical field, concretely is a kind of coating device for steel structure processing. BACKGROUND

[0002] Steel structure is the structure of steel material composition, is one of main building structure types, is widely used in large factory, venue, super high-rise, bridge and other fields.Structure is mainly composed of steel beam, steel column, steel truss and other components made of sectional steel and steel plate, since steel structure is easy to rust, general steel structure is to be rusted, galvanized or coating, thus after steel structure forming, paint spraying processing is carried out;

[0003] The coating device for steel structure processing in prior art uses clamping device to hoist and transport steel structure workpiece, thus in spraying process, the clamping part of workpiece cannot be sprayed by paint due to clamping device, subsequent processing needs to be additionally carried out by worker, leading to low processing efficiency;In addition, the installation of spray head assembly of existing device is relatively fixed, and position cannot be adjusted according to the size of workpiece, leading to that paint cannot effectively cover the surface of workpiece, for this reason, we propose a kind of coating device for steel structure processing. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the defects of prior art, provide a kind of coating device for steel structure processing, spraying frame is arranged between feed conveyor and discharge conveyor, feed conveyor and discharge conveyor are separated by a certain distance, so that each surface of the outer side of the conveyed steel structure workpiece is exposed when passing through spraying frame, so that the spraying device can fully spray the steel structure workpiece, avoid the situation that local part cannot be sprayed due to the use of clamping part;It also has reliable full-spray unit, atomizing nozzle can liquefy paint, and the outward expansion structure of spray opening can make material be sprayed outward in fan-shaped area, electric push rod is used to push atomizing nozzle close to or away from workpiece surface, so that the coverage range of spraying area can be controlled according to the size of workpiece, four atomizing nozzles enclose frame type structure, so as to fully cover the outer surface of steel structure workpiece;And it has the function of keeping workpiece in the middle, to ensure the effective operation of subsequent spraying operation, can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of coating device for steel structure processing, including support, relay conveying unit and full-spray unit;

[0006] Support: there are two left and right, and one fixed foot base is fixedly connected at the lower end of each support, bolt through hole is formed in the four corners of fixed foot base;

[0007] The relay conveying unit comprises a spraying frame, an in-feed conveyor, an out-feed conveyor, a support rod, a connecting frame, a stable foot base and a hot air blower. The spraying frame is a square structure, and a set of spraying devices is installed at the middle of each side. The in-feed conveyor is installed on the front side of the spraying frame, and the out-feed conveyor is installed on the back side of the spraying frame. A hot air blower with an upward air outlet is installed at the lower back side of the spraying frame. Four support rods are fixedly connected to the lower ends of the outer frames of the in-feed conveyor and the out-feed conveyor. The four support rods are arranged in a rectangular diagonal pattern, and a square stable foot base is fixedly connected to the lower end of each support rod. An X-shaped connecting frame is fixedly connected between the front and rear adjacent two support rods. The in-feed conveyor and the out-feed conveyor correspond to the vertical center line of the spraying frame, and the upper end surfaces of the two are flush with one-third of the height of the interior of the spraying frame.

[0008] The full-spraying unit is installed on the upper side of the in-feed conveyor and the inner and outer sides of the spraying frame.

[0009] The support rods are used to support the spraying frame, and the four corners of the stable foot base can be fixed by mounting bolts to fix the spraying frame. The spraying frame is arranged between the in-feed conveyor and the out-feed conveyor, and the in-feed conveyor and the out-feed conveyor are separated by a certain distance, so that when the steel structure workpiece passes through the spraying frame, each surface on the outside of the steel structure workpiece is exposed, so that the spraying device can fully spray the steel structure workpiece, avoiding the use of clamping parts to cause local spraying failure. The hot air blower can accelerate the air drying of the paint on the lower side of the workpiece, avoiding the abrasion of the lower paint surface in the subsequent conveying process. The support rods are used to support the two conveyors, and the X-shaped connecting frame can improve the structural stability between the adjacent two support rods, and the stable foot base can make the placement of the conveyor more stable.

[0010] Further, the relay conveying unit further comprises a hydraulic cylinder one, a sleeve block and a photoelectric sensor. A hydraulic cylinder one is embedded and installed in each support rod on the lower side of the out-feed conveyor. Four sleeve blocks are fixedly connected to the lower end of the outer frame of the out-feed conveyor. The four sleeve blocks are vertically corresponding to one hydraulic cylinder one respectively. The extension end of the hydraulic cylinder one is upward and fixedly connected to the inside of the sleeve block. A photoelectric sensor is installed on the back side of the right side frame of the in-feed conveyor. The receiving end of the photoelectric sensor is embedded and installed in the mounting hole of the front end of the right side frame of the out-feed conveyor. The photoelectric sensor is used to detect whether the two conveyors are horizontal. The hydraulic cylinder one is used to drive the out-feed conveyor to adjust the vertical height, so that the upper end surface of the out-feed conveyor can be kept on the same horizontal plane as the upper end of the in-feed conveyor, so that the end of the workpiece passing through the spraying frame can be placed on the starting end of the out-feed conveyor, thereby realizing the relay transmission of the steel structure workpiece.

[0011] Furthermore, the system includes electric push rods and atomizing nozzles. An electric push rod is installed at the middle position of each side of the spraying frame. The base of the electric push rod is fixedly connected to the spraying frame by bolts. The telescopic rod of the electric push rod faces inward towards the inside of the spraying frame. The four electric push rods are arranged in a cross shape, and a rectangular atomizing nozzle is fixedly connected to the telescopic end of each electric push rod. The inner side of the atomizing nozzle has an outwardly expanding nozzle. The atomizing nozzle liquefies the paint, and the outward expansion structure of the nozzle allows the material to be sprayed outward in a fan-shaped area. The electric push rod is used to push the atomizing nozzle closer to or further away from the workpiece surface, thereby controlling the coverage area of ​​the spraying area according to the size of the workpiece. The four atomizing nozzles form a frame structure, thus fully covering the outer surface of the steel structure workpiece.

[0012] Furthermore, the comprehensive spraying unit also includes mounting blocks, hydraulic cylinders, and rubber blocks. The mounting blocks are L-shaped and four in number, arranged diagonally in a rectangle, and are secured to the upper side of the outer frame of the feeding conveyor. The lower side of each mounting block is fixedly connected to the outer frame of the feeding conveyor by bolts. A hydraulic cylinder is mounted on the upper side of each mounting block, with its extension end horizontally facing the inside of the feeding conveyor. A rubber block is fixed to the end of each hydraulic cylinder. The mounting blocks are used to install the hydraulic cylinders. The hydraulic cylinders on both sides work synchronously, pushing the steel structure workpiece to the center, allowing the workpiece to pass through the center of the spraying frame, ensuring the effective execution of subsequent spraying operations. The rubber blocks cushion and protect the contact surface when the extension end of the hydraulic cylinder contacts the workpiece.

[0013] Furthermore, the comprehensive spraying unit also includes a connecting slide rod and a feed pipe. Each atomizing nozzle has a connecting slide rod fixedly connected to its back. The connecting slide rod is hollow and slidably connected to the spraying frame. The feed pipe passes through the inside of the connecting slide rod and is fixedly fitted to the feed port of the atomizing nozzle. The feed pipe is used to transport the sprayed paint, and the connecting slide rod provides abrasion protection for the feed pipe.

[0014] Furthermore, it also includes a PLC controller and a control panel. The PLC controller is installed at the center of the connecting frame on the right side of the discharge conveyor, and the control panel is installed on the rear left side of the spraying frame. The PLC controller is used to receive signals from the photoelectric sensor and control the hydraulic cylinder to perform corresponding working states, thereby achieving automatic calibration of the upper surfaces of the two conveyors to be level. The control panel is used to manually adjust the position of the four atomizing nozzles.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This coating device for steel structure processing has the following advantages:

[0016] 1. The spraying frame is arranged between the feeding conveyor and the discharging conveyor, the feeding conveyor and the discharging conveyor are separated by a certain distance, so that the outer surfaces of the conveyed steel structure workpiece are exposed when passing through the spraying frame, so that the spraying device can fully spray the steel structure workpiece, avoiding the situation that local spraying cannot be achieved due to the use of clamping parts.

[0017] 2. The utility model discloses a reliable full-spraying unit, the atomizing nozzle can liquefy paint, and the outward expansion structure of the nozzle can make the paint spray outward in a fan-shaped area, the electric push rod is used for pushing the atomizing nozzle to be close to or away from the surface of the workpiece, so that the coverage range of the spraying area can be controlled according to the size of the workpiece, and the four atomizing nozzles enclose a frame-shaped structure, so as to fully cover the outer surface of the steel structure workpiece.

[0018] 3. The spraying frame is arranged between the feeding conveyor and the discharging conveyor, the feeding conveyor and the discharging conveyor are separated by a certain distance, so that the outer surfaces of the conveyed steel structure workpiece are exposed when passing through the spraying frame, so that the spraying device can fully spray the steel structure workpiece, avoiding the situation that local spraying cannot be achieved due to the use of clamping parts. It also has a reliable full-spraying unit, the atomizing nozzle can liquefy paint, and the outward expansion structure of the nozzle can make the paint spray outward in a fan-shaped area, the electric push rod is used for pushing the atomizing nozzle to be close to or away from the surface of the workpiece, so that the coverage range of the spraying area can be controlled according to the size of the workpiece, and the four atomizing nozzles enclose a frame-shaped structure, so as to fully cover the outer surface of the steel structure workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a right front side structure schematic view of the utility model;

[0020] Figure 2 It is a right side structure schematic view of the utility model;

[0021] Figure 3 It is a partial structure schematic view of the utility model;

[0022] Figure 4 It is a right front side structure schematic view of the utility model; Figure 3 It is a right front side structure schematic view of the utility model;

[0023] In the figure: 1 support, 2 fixed foot base, 3 relay conveying unit, 31 spraying frame, 32 feeding conveyor, 33 discharging conveyor, 34 supporting rod, 35 connecting frame, 36 stable foot base, 37 hydraulic cylinder I, 38 sleeve block, 39 photoelectric sensor, 310 hot air blower, 4 overall spraying unit, 41 electric push rod, 42 atomizing nozzle, 43 sleeve sliding rod, 44 feeding pipe, 45 mounting clamping block, 46 hydraulic cylinder II, 47 rubber block, 5 PLC controller, 6 control panel. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-4 The embodiment provides a technical scheme: a coating device for steel structure machining, which comprises a support 1, a relay conveying unit 3 and an overall spraying unit 4.

[0026] The support 1 is provided with two left and right supports, and a fixed foot base 2 is fixedly connected to the lower end of each support 1, and bolt through holes are formed in the four corners of the fixed foot base 2.

[0027] The relay conveying unit 3 comprises a spraying frame 31, a feeding conveyor 32, a discharging conveyor 33, a supporting rod 34, a connecting frame 35, a stable foot base 36 and a hot air blower 310. The spraying frame 31 is of square structure, and a set of spraying devices is installed at the middle position of each side. The feeding conveyor 32 is installed on the front side of the spraying frame 31, and the discharging conveyor 33 is installed on the rear side of the spraying frame 31. The hot air blower 310 with the air outlet upward is installed at the lower position of the rear side of the spraying frame 31. Four supporting rods 34 are fixedly connected to the lower end of the outer frame of the feeding conveyor 32 and the discharging conveyor 33. The four supporting rods 34 are distributed in a rectangular diagonal manner, and a square stable foot base 36 is fixedly connected to the lower end of each supporting rod 34. An X-shaped connecting frame 35 is fixedly connected between the front and rear adjacent two supporting rods 34. The feeding conveyor 32 and the discharging conveyor 33 correspond to the vertical center line of the spraying frame 31, and the upper end faces of the two are flush with one-third of the height of the inside of the spraying frame 31.

[0028] The overall spraying unit 4 is installed on the upper side of the feeding conveyor 32 and the inner and outer sides of the spraying frame 31.

[0029] The support column 1 is used to support the spraying frame 31, and the four corners of the fixed foot base 2 can be fixed by mounting bolts to fix the spraying frame 31; the spraying frame 31 is arranged between the feeding conveyor 32 and the discharging conveyor 33, and the feeding conveyor 32 and the discharging conveyor 33 are separated by a certain distance, so that the outer surfaces of the conveyed steel structure workpiece are exposed when passing through the spraying frame 31, so that the spraying device can fully spray the steel structure workpiece, avoiding the use of clamping parts to cause local spraying failure; the hot air blower 310 can accelerate the paint on the lower side of the workpiece to dry, avoiding the wear of the lower paint surface in the subsequent conveying process; the support rod 34 is used to support the two conveyors, and the X-shaped connecting frame 35 can improve the structural stability between the two adjacent side support rods 34, and the stable foot base 36 can make the placement of the conveyor more stable.

[0030] The relay conveying unit 3 further comprises a hydraulic cylinder one 37, a sleeve block 38 and a photoelectric sensor 39, and each support rod 34 at the lower side of the discharging conveyor 33 is embedded with a hydraulic cylinder one 37, the lower end of the outer frame of the discharging conveyor 33 is fixedly connected with four sleeve blocks 38, and the four sleeve blocks 38 are vertically corresponding to one hydraulic cylinder one 37 respectively, the telescopic end of the hydraulic cylinder one 37 is upward and fixedly connected in the sleeve block 38, and the rear side of the right side frame of the feeding conveyor 32 is provided with a photoelectric sensor 39, and the receiving end of the photoelectric sensor 39 is embedded in the mounting hole of the front end of the right side frame of the discharging conveyor 33. The photoelectric sensor 39 is used to detect whether the two conveyors are horizontal, and the hydraulic cylinder one 37 is used to drive the discharging conveyor 33 to adjust the vertical height, so that the upper end surface of the discharging conveyor 33 and the upper end of the feeding conveyor 32 can be kept on the same horizontal plane, so that the end of the workpiece passing through the spraying frame 31 can be placed on the starting end of the discharging conveyor 33, thereby realizing the relay transmission of the steel structure workpiece.

[0031] The spraying frame 31 comprises an electric push rod 41 and an atomizing nozzle 42, and one electric push rod 41 is arranged at the middle position of each side of the spraying frame 31, the seat body of the electric push rod 41 is fixedly connected with the spraying frame 31 through bolts, the telescopic rod of the electric push rod 41 is directed to the inside of the spraying frame 31, the four electric push rods 41 are distributed in a cross shape, and one rectangular atomizing nozzle 42 is fixedly connected to the telescopic end of each electric push rod 41, and the inside of the atomizing nozzle 42 is provided with an outwardly expanding nozzle. The atomizing nozzle 42 can liquefy the paint, and the outward expansion structure of the nozzle can make the material spray outward in a fan-shaped area, the electric push rod 41 is used to push the atomizing nozzle 42 close to or away from the surface of the workpiece, so as to control the coverage range of the spraying area according to the size of the workpiece, and the four atomizing nozzles 42 form a frame structure, thereby fully covering the outer surface of the steel structure workpiece.

[0032] The full spraying unit 4 further comprises four mounting blocks 45, two hydraulic cylinders 46 and four rubber blocks 47. The mounting blocks 45 are L-shaped and arranged in a rectangular diagonal manner. The upper side of each mounting block 45 is fixedly connected to the outer frame of the feeding conveyor 32 by bolts. The upper side of each mounting block 45 is provided with a hydraulic cylinder 46. The extension end of each hydraulic cylinder 46 horizontally faces the inner side of the feeding conveyor 32. The extension end of each hydraulic cylinder 46 is provided with a rubber block 47. The mounting blocks 45 are used for mounting the hydraulic cylinders 46. The two hydraulic cylinders 46 work synchronously to push the steel workpiece to the center, so that the workpiece can pass through the center of the spraying frame 31, thereby ensuring the effective operation of the subsequent spraying operation. The rubber blocks 47 can buffer and protect the contact surface when the extension end of the hydraulic cylinder 46 contacts the workpiece.

[0033] The full spraying unit 4 further comprises a sleeve sliding rod 43 and a feeding pipe 44. The back of each atomizing nozzle 42 is fixedly connected with a sleeve sliding rod 43. The sleeve sliding rod 43 is hollow and slidably connected with the spraying frame 31. The feeding pipe 44 is arranged in the sleeve sliding rod 43 and fixedly connected with the feeding port of the atomizing nozzle 42. The feeding pipe 44 is used for conveying the spraying paint. The sleeve sliding rod 43 is used for protecting the feeding pipe 44 from abrasion.

[0034] The device further comprises a PLC controller 5 and a control panel 6. The PLC controller 5 is arranged at the center of the connecting frame 35 on the right side of the discharging conveyor 33. The control panel 6 is arranged at the left end of the spraying frame 31. The PLC controller 5 is used for receiving the signal of the photoelectric sensor 39 and controlling the working state of the hydraulic cylinder 37, thereby realizing the automatic calibration of the horizontal end face of the two conveyors. The control panel 6 is used for manually adjusting the position of the four atomizing nozzles 42.

[0035] The working principle of the coating device for steel structure machining is as follows: in the device, the support column 1 is used for supporting the spraying frame 31, the four corners of the fixed foot base 2 can be fixed by mounting bolts, so as to fix the spraying frame 31; the spraying frame 31 is arranged between the feeding conveyor 32 and the discharging conveyor 33, the feeding conveyor 32 and the discharging conveyor 33 are separated by a certain distance, so that the outer surface of the conveyed steel structure workpiece is exposed when passing through the spraying frame 31, so that the spraying device can comprehensively spray the steel structure workpiece, and the use of clamping parts is avoided to cause local spraying failure; the hot air blower 310 can accelerate the paint on the lower side of the workpiece to dry, and avoid the lower paint surface from being abraded in the subsequent conveying process; the support rod 34 is used for supporting the two conveyors, the X-shaped connecting frame 35 can improve the structural stability between the two adjacent side support rods 34, and the stable foot base 36 can make the placement of the conveyor more stable; the photoelectric sensor 39 is used for detecting whether the two conveyors are horizontal, the hydraulic cylinder one 37 is used for driving the discharging conveyor 33 to adjust the vertical height, so that the upper end surface of the discharging conveyor 33 and the upper end of the feeding conveyor 32 can be kept on the same horizontal plane, so that the workpiece end part passing through the spraying frame 31 can be placed on the starting end of the discharging conveyor 33, so that the relay transmission of the steel structure workpiece can be realized. The device also has a reliable comprehensive spraying unit 4, the atomizing nozzle 42 can liquefy the paint, and the outward expansion structure of the nozzle can make the material be sprayed out in a fan-shaped area, the electric push rod 41 is used for pushing the atomizing nozzle 42 to be close to or away from the surface of the workpiece, so that the coverage range of the spraying area can be controlled according to the size of the workpiece, the four atomizing nozzles 42 surround a frame structure, so that the outer surface of the steel structure workpiece can be comprehensively covered; and has the function of centrally holding the workpiece, so as to ensure the effective operation of the subsequent spraying operation, the mounting clamping block 45 is used for mounting the hydraulic cylinder two 46, the two hydraulic cylinders two 46 work synchronously, can push the steel structure workpiece to be centered, so that the workpiece can pass through the center of the spraying frame 31, so as to ensure the effective operation of the subsequent spraying operation, the rubber block 47 can buffer and protect the contact surface when the hydraulic cylinder two 46 telescopic end contacts the workpiece; the material conveying pipe 44 is used for conveying the spraying paint, and the sleeved sliding rod 43 is used for preventing the material conveying pipe 44 from being abraded. In addition, the PLC controller 5 is used for receiving the signal of the photoelectric sensor 39 and controlling the hydraulic cylinder one 37 to work correspondingly, so as to realize the automatic calibration of the horizontal and unified upper end surfaces of the two conveyors, and the control panel 6 is used for manually adjusting the position of the four atomizing nozzles 42.

[0036] It is worth noting that the input end of the feeding conveyor 32, the discharging conveyor 33 and the hot air blower 310 disclosed in the above embodiment are electrically connected with the output end of the external power source through an external control switch group, the hydraulic cylinder one 37 and the hydraulic cylinder two 46 are electrically connected with the output end of the external power source through the PLC controller 5, the photoelectric sensor 39 is bidirectionally electrically connected with the PLC controller 5, the four electric push rods 41 are all electrically connected with the output end of the external power source through the control panel 6, and the switch control corresponding electrical device working all adopts the method commonly used in the prior art.

[0037] The above only describes the embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection range of the present application.

Claims

1. A painting device for steel structure processing, characterized in that: It includes a support column (1), a relay transport unit (3), and a full-coverage painting unit (4); Support column (1): There are two on the left and right, and a fixed foot (2) is fixedly connected to the lower end of each support column (1). Bolt through holes are opened at the four corners of the fixed foot (2). Relay transport unit (3): includes a spraying frame (31), a feeding conveyor (32), a discharging conveyor (33), a support rod (34), a connecting frame (35), a stabilizing foot (36), and a hot air blower (310). The spraying frame (31) is a square structure, and a set of spraying devices is installed at the middle position of each side. The feeding conveyor (32) is installed on the front side of the spraying frame (31), the discharging conveyor (33) is installed on the rear side of the spraying frame (31), and a hot air blower (310) with an upward-facing air outlet is installed at the lower rear position of the spraying frame (31). 0), the lower ends of the outer frame of the feeding conveyor (32) and the discharging conveyor (33) are fixedly connected with four support rods (34). The four support rods (34) are arranged diagonally in a rectangle, and a square stable foot (36) is fixedly connected to the lower end of each support rod (34). An X-shaped connecting frame (35) is fixedly connected between two adjacent support rods (34). The feeding conveyor (32) and the discharging conveyor (33) are both aligned with the vertical center line of the spraying frame (31), and the upper end surfaces of both are flush with one-third of the height inside the spraying frame (31). Full-body spraying unit (4): installed on the upper side of the feed conveyor (32) and on both the inner and outer sides of the spraying frame (31).

2. The painting device for steel structure processing according to claim 1, characterized in that: The relay conveying unit (3) also includes a hydraulic cylinder (37), a socket block (38), and a photoelectric sensor (39). Each support rod (34) on the lower side of the discharge conveyor (33) is fitted with a hydraulic cylinder (37). Four socket blocks (38) are fixedly connected to the lower end of the outer frame of the discharge conveyor (33). The four socket blocks (38) are vertically corresponding to a hydraulic cylinder (37) respectively. The telescopic end of the hydraulic cylinder (37) faces upward and is fixedly connected inside the socket block (38). A photoelectric sensor (39) is installed on the rear side of the right frame of the feed conveyor (32). The receiving end of the photoelectric sensor (39) is embedded in the mounting hole at the front end of the right frame of the discharge conveyor (33).

3. The coating device for steel structure processing according to claim 1, characterized in that: Includes an electric push rod (41) and an atomizing nozzle (42). An electric push rod (41) is installed at the middle position of each side of the spraying frame (31). The base of the electric push rod (41) is fixedly connected to the spraying frame (31) by bolts. The telescopic rod of the electric push rod (41) faces the inside of the spraying frame (31). The four electric push rods (41) are arranged in a cross shape. A rectangular atomizing nozzle (42) is fixedly connected to the telescopic end of each electric push rod (41). The inner side of the atomizing nozzle (42) has an outwardly expanding nozzle.

4. The painting device for steel structure processing according to claim 1, characterized in that: The full-coverage spraying unit (4) also includes mounting blocks (45), hydraulic cylinders (46) and rubber blocks (47). The mounting blocks (45) are L-shaped and there are four of them. The four mounting blocks (45) are arranged diagonally in a rectangle and are mounted on the upper side of the outer frame of the feed conveyor (32). The lower side of the mounting blocks (45) is fixedly connected to the outer frame of the feed conveyor (32) by bolts. A hydraulic cylinder (46) is mounted on the upper side of each mounting block (45). The telescopic end of the hydraulic cylinder (46) is horizontally facing the inner side of the feed conveyor (32), and a rubber block (47) is fixedly mounted on the end of each hydraulic cylinder (46).

5. A painting device for steel structure processing according to claim 3, characterized in that: The full-coverage spraying unit (4) also includes a sleeve slide rod (43) and a material conveying pipe (44). A sleeve slide rod (43) is fixedly connected to the back of each atomizing nozzle (42). The sleeve slide rod (43) is hollow inside and is slidably connected to the spraying frame (31). The material conveying pipe (44) passes through the inside of the sleeve slide rod (43) and is sleeved and fixed at the feed port of the atomizing nozzle (42).

6. The painting device for steel structure processing according to claim 1, characterized in that: It also includes a PLC controller (5) and a control panel (6). The PLC controller (5) is installed at the center of the connecting frame (35) on the right side of the discharge conveyor (33), and the control panel (6) is installed on the rear left side of the spraying frame (31).

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