Coastal Climate Steel Structure Arc Spraying Composite Anti-Corrosion Device and Spraying Method

Abstract

The present invention discloses a coastal climate steel structure arc spraying composite anti-corrosion device and a spraying method, belonging to the field of steel structure spraying in coastal climate, including a coastal climate steel structure arc spraying composite anti-corrosion device, including an H-shaped workpiece. Hoisting holes are respectively opened at both ends of the H-shaped workpiece. The device further includes a machine table frame, on which a clamping assembly, a driving assembly and a spraying assembly are respectively installed; The clamping assembly includes a center frame, and an installation block is arranged inside the center frame. A plurality of groups of installation blocks are arranged and each is provided with a first installation hole. A clamp is installed on the installation block, and the clamp is suitable for installing and clamping the H-shaped workpiece; The driving assembly includes a rotating mechanism and an external power supply, and the rotating mechanism is suitable for driving the rotation of the workpiece under the external power supply; The spraying assembly includes a spray gun and a track frame. The track frame includes an arc-shaped bottom, and a driving part is installed on the top of the track frame. The driving part is suitable for driving the spray gun to move on the arc-shaped bottom, and the spray gun is suitable for spraying on the surface and both ends of the H-shaped workpiece. The present invention solves the problem that it is difficult to spray both ends of the H-shaped workpiece.

Description

Technical Field

[0001] The present invention belongs to the field of spraying of steel structures in sea surface climate, and particularly relates to an electric arc spraying composite anti-corrosion device and a spraying method for steel structures in coastal climate. Background Art

[0002] At present, the main anti-corrosion method for steel structures at home and abroad is the heavy anti-corrosion coating system, which is a triple coating heavy anti-corrosion system composed of inorganic or epoxy zinc-rich primer, epoxy intermediate paint and polyurethane topcoat.

[0003] For electric arc spraying, the spraying of the ends of workpieces is often interfered by jigs, resulting in the inability to process the ends. The ends are commonly installed in steel structures and are relatively easy to expose on the surface. After the equipment finishes spraying, it is necessary to manually process the sides, or process manually throughout the process; this makes it difficult to control the coating thickness of manual spraying, and the processing efficiency will be reduced over a long time.

[0004] Reference document CN115090475A, a rotary anti-corrosion coating device for offshore engineering pipelines, describes a method of lifting the steel pipe to achieve spraying and cleaning. However, because the surface of the steel pipe is regular, if the jig is installed on the inner wall of the steel pipe, the spraying at both ends can be achieved without interference. When dealing with H-shaped steel or workpieces with closed ends to be processed, it is inevitable that the jig will affect the spraying at both ends. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to solve the problem that it is difficult to spray the two ends of H-shaped workpieces.

[0006] To solve the above technical problem, the inventor obtained the technical solution of the present invention through practice and summary. The present invention discloses an electric arc spraying composite anti-corrosion device for steel structures in coastal climate, including an H-shaped workpiece, and hoisting holes are respectively opened at both ends of the H-shaped workpiece. The device further includes:

[0007] A machine table frame, on which a clamping assembly, a driving assembly and a spraying assembly are respectively installed;

[0008] The clamping assembly includes a center frame, an installation block is arranged inside the center frame, multiple groups of the installation blocks are provided and each is provided with a first installation hole, a jig is installed on the installation block, and the jig is suitable for installing and clamping the H-shaped workpiece;

[0009] The driving assembly includes a rotating mechanism and an external power source, and the rotating mechanism is suitable for driving the rotation of the workpiece under the external power source;

[0010] The spraying assembly includes a spray gun and a track frame, the track frame includes an arc-shaped bottom, a driving member is installed on the top of the track frame, the driving member is suitable for driving the spray gun to move on the arc-shaped bottom, and the spray gun is suitable for spraying on the surface and both ends of the H-shaped workpiece.

[0011] In a further technical solution, the fixture includes a support plate, a clamping plate and side plates. The clamping plate is fixedly connected to the side plates and the support plate respectively. The support plate is provided with a second mounting hole adapted to the first mounting hole, and the support plate is detachably connected to the mounting block;

[0012] The H-shaped workpiece includes an H-shaped steel, which includes a web and flanges located on both sides of the web. The shape of the clamping plate is adapted to fit into the concave cavity formed by the connection of the flanges and the web. The support plates are installed on both sides of the clamping plate;

[0013] The side plate is a bent plate, and the bent plate is provided with mounting and positioning holes.

[0014] During the arc spraying of the H-shaped workpiece, spraying is performed on the surface of the web, the side surface where the web and the flange are connected, the surface and the end of the flange. For example, the steel structure frame on an offshore platform is in a marine humid environment for a long time, that is, in the marine atmospheric zone, and is easily corroded by ultraviolet rays and water vapor. Therefore, detailed spraying on the surface is required during arc spraying;

[0015] Further, four groups of the mounting blocks are provided and are arranged in a rectangular distribution. The number of the support plates corresponds to that of the mounting blocks. Two groups of the clamping plates are provided and are installed on the upper and lower sides of the H-shaped workpiece. The side plates are respectively installed on both sides of the clamping plates on the upper and lower sides, and locking bolts are installed and locked in the two groups of positioning holes correspondingly.

[0016] In a further technical solution, the center frame includes a fixed shell. A cavity is provided in the fixed shell. A rotating gear ring is installed in the cavity. The rotating gear ring is adapted to rotate in the cavity. The inner wall of the rotating gear ring is fixedly connected to the mounting block. Two groups of corresponding supporting bottom gears are installed at the bottom of the rotating gear ring. Two groups of the bottom gears are installed and are respectively located on both sides of the vertical axis of the rotating gear ring. A driving motor is installed at one group of the bottom gears. The output shaft of the driving motor is coaxially connected to the corresponding bottom gear. The driving motor is adapted to drive the bottom gear to drive the rotating gear ring to rotate.

[0017] In a further technical solution, two groups of track frames are respectively installed on both sides of the center frame; the track frame includes a longitudinal plate and a transverse plate. The tops of the longitudinal plate and the transverse plate are adapted to form a "T" shape. Both the longitudinal plate and the transverse plate are frame plates. The length of the longitudinal plate is greater than that of the transverse plate;

[0018] Both the longitudinal plate and the transverse plate are provided with intermediate grooves and are communicated with each other. The intermediate groove is in a "T" shape. Groove rails are provided on both sides of the inner wall of the longitudinal plate, and a sliding vehicle is installed between the two groups of groove rails. A spray gun is installed in the sliding vehicle. The spray gun is adapted to perform downward arc spraying on the H-shaped workpiece.

[0019] In a further technical solution, a first driving wheel and a second driving wheel are respectively arranged at two longitudinal ends of the longitudinal plate. A fixed wheel is installed on the sliding vehicle, and the fixed wheel is suitable for being installed at the upper end of the sliding vehicle. One end of a transmission rope is installed on the fixed wheel, and the other end of the transmission rope is suitable for being wound around the first driving wheel and the second driving wheel and fixed on the sliding vehicle;

[0020] A fixed frame is installed on the fixed wheel, and an operating motor is installed on the fixed frame. The output shaft of the operating motor is fixedly connected to the fixed wheel, and the operating motor is suitable for driving the sliding vehicle to move along the longitudinal plate.

[0021] In a further technical solution, a notch part is arranged on the sliding vehicle, and the notch part is suitable for being opened toward the side of the transverse plate. A bearing block is installed on the notch part, and the bearing block is suitable for being detachably connected to the notch part. The spray gun is installed below the notch part, and the spray gun includes a transmission pipeline, and the transmission pipeline is installed at the upper end of the bearing block;

[0022] Both the top and the bottom of the transverse plate are arc-shaped. A first rotating shaft is installed at one end of the transverse plate far from the longitudinal plate, and a first transverse wheel is installed at the top of the first rotating shaft. A second rotating shaft is installed on the sliding vehicle and a second transverse wheel is installed at the top;

[0023] A transmission rope is installed on the first transverse wheel, and a first pipe sleeve is hingedly installed on the transmission rope. The first pipe sleeve is suitable for sleeving on the transmission pipeline. A limiting ring is fixedly installed on the transmission pipeline, and the limiting ring is suitable for restricting the position of the first pipe sleeve on the transmission pipeline;

[0024] A transmission rope is installed on the second transverse wheel, and a second pipe sleeve is hingedly installed on the transmission rope. The second pipe sleeve is suitable for sleeving on the transmission pipeline and is located between the limiting ring and the first pipe sleeve; A connecting motor is installed on both the first transverse wheel and the second transverse wheel, and the two groups of connecting motors are suitable for respectively driving the first transverse wheel and the second transverse wheel to rotate;

[0025] Arc-shaped supporting plates are arranged on both sides of the bearing block, and an arc-shaped groove is arranged inside the transverse plate. The arc-shaped supporting plates are suitable for sliding in the arc-shaped groove.

[0026] In a further technical solution, a transverse lead screw and a main motor are installed on the machine frame. The center frame is installed on the transverse lead screw, and the main motor and the transverse lead screw are suitable for being connected by a coupling and suitable for driving the center frame to move by rotating the transverse lead screw.

[0027] In a further technical solution, two sets of the track frames are provided and installed on both sides of the center frame. The two sets of track frames are symmetrically arranged. A bidirectional lead screw is installed at the bottom of the track frame. Two sets of bidirectional lead screws are provided and located on both sides of the transverse lead screw. A sub-motor is installed outside the bidirectional lead screw, and the sub-motor is adapted to drive the two track frames on the bidirectional lead screw to move.

[0028] The spraying method of the arc spraying composite anti-corrosion device for steel structures in coastal climates includes the following steps:

[0029] Step 1, select and match coating materials

[0030] Based on the fact that most of the steel structures in coastal structures are in the marine atmosphere area or the splash zone, zinc-aluminum alloy is used as the metal coating for arc spraying, and then the primer layer, intermediate layer and topcoat layer are applied by brushing;

[0031] For the primer layer, epoxy asphalt coating or nano-modified epoxy sealing coating is used;

[0032] For the intermediate layer, one or more of zinc-rich paint, phenolic resin paint, and alkyd resin paint are used;

[0033] For the topcoat layer, nano-modified fluorinated polyurethane coating or nano-modified fluorinated polysiloxane coating is used;

[0034] Step 2, hoisting and installation

[0035] Perform sandblasting treatment on the surface of the H-shaped workpiece to make the surface cleanliness reach Sa2.5 level or Sa3 level, and the surface roughness should reach Rz25-100μm. Install a lifting ring on the lifting hole and be hoisted and installed onto the lifting hole, with one end inserted into the center frame; install a fixture inside the center frame. The side plate in the fixture installs a locking bolt through the positioning hole, and installs the fixture shape adapted to the H-shaped workpiece through a combined assembly method. Adjust the H-shaped workpiece in the actual installed fixture to be horizontal, with a vertical cross-section in the shape of "H". One end of the H-shaped workpiece is inserted into the fixture, release one end of the lifting ring, and install a lifting ring again on the other side of the center frame to ensure that the H-shaped workpiece is balanced and installed on the center frame;

[0036] Step 3, spray the web

[0037] Move the track frame and make the spray gun located on both sides of the center frame. Then, the spray gun on the center frame slides along the longitudinal direction from the set starting point, and the track frame steadily moves to both sides on the bidirectional lead screw, so that the arc spraying reciprocally sprays on the web;

[0038] Step 4, spray the flange

[0039] When spraying to one side of the web, set the rotation angle A of the rotating toothed ring. Taking the rotation angle A as the positive direction, make the spraying range of the spray gun cover the side of the flange relative to the web and spray, and then rotate and spray the side of the flange facing away from the web;

[0040] Rotate in the reverse direction by an angle of 2A, move the sliding carriage to the other side of the longitudinal plate, and spray the other flange of the web.

[0041] Return to the horizontal state, rotate another 180°, and spray the other side of the web; then rotate the rotating toothed ring by an angle A so that the spraying range of the spray gun covers the side surface of the flange relative to the web; rotate in the reverse direction by an angle of 2A, move the sliding carriage to the other side of the longitudinal plate, and spray the other flange of the web.

[0042] The angle A, because when the spray gun sprays to a certain edge line, it is necessary to rotate a certain angle, that is, the angle A, to spray the web and the flange. The angle A is an acute angle to achieve a better spraying effect because the specifications of the H-shaped steel are not completely the same, and there are some differences in the angle A.

[0043] Step Five: Spraying on both sides

[0044] At both ends of the H-shaped workpiece, the spray gun needs to rotate by an angle B, and the rotation angle of the arc bottom on the track frame is suitable for the spray gun to rotate by the angle B for operation; when the sliding carriage reaches the connection between the longitudinal plate and the transverse plate in the middle groove, the first transverse wheel drives the rotation and makes the bearing block installed in the notch move towards the transverse plate, and the arc-shaped support plate on the bearing block moves along the arc-shaped groove until the rotation angle conforms to the rotation angle B, and then starts spraying, and the central frame rotates 360°; the rotation angle B is an acute angle and does not need to be completely rotated to the direction perpendicular to the end of the H-shaped workpiece. The subsequent repeated steps will spray the end of the H-shaped workpiece again.

[0045] The two groups of track frames move synchronously from the center to the outside.

[0046] Step Six: Install a lifting ring at the lifting hole and remove the fixture. Then, the central frame moves towards a group of track frames. After completely moving to the sprayed area, the spray gun on the other group of track frames performs the spraying operations of repeating Step Three and Step Four to spray the position before the central frame moves.

[0047] Step Seven: After spraying, reverse the steps of Step Two, take out the H-shaped workpiece, and place it for static placement.

[0048] At room temperature, the primer layer is left standing for 8 - 12 hours, with a thickness of 20 - 60 μm; the intermediate layer is left standing for 4 hours, with a thickness of 50 - 100 μm; the topcoat layer is left standing for more than 24 hours, with a thickness of 80 - 120 μm.

[0049] Repeat the processing steps from Step One to Step Six to complete the processing of the primer layer, intermediate layer, and topcoat.

[0050] Compared with the prior art, the present invention can obtain the following technical effects:

[0051] The first consideration of the present invention is the arc spraying effect of H-shaped workpieces. Commonly used in the existing technology are round tubes or steel plates. If a handheld arc spraying gun is used, it can spray the surface with relatively high flexibility. However, firstly, the surface treatment cannot ensure the handheld distance, secondly, different coating thicknesses affect the service life of the workpiece, and thirdly, it is difficult to ensure the end treatment.

[0052] The H-shaped workpiece is refined into two groups of web surfaces, the connecting sides of the web and flange, the flange surface spraying and the ends. During the spraying of the web surface, a stable reciprocating movement is required to ensure the spraying effect; the connecting sides of the web and flange need to rotate the angle; the end spraying requires the spray gun to turn.

[0053] In the existing arc spraying of round tubes or steel plates, when the fixture clamps the workpiece, the clamped position needs to be re-sprayed to ensure the spraying effect. The lifting holes are designed in the present invention considering that holes need to be drilled for synchronous installation in the steel structure during actual installation. The installation effect of using the center support is not the same as that of using the two-end installation method because the plane where the center support is located is in a position convenient for processing, while the ends are not convenient for processing.

[0054] The present invention adopts a detachable fixture method including a support plate, a clamping plate and a side plate, which are combined and clamped on the surface of the workpiece. Secondly, the present invention adopts the method of a transmission rope to realize the reciprocating movement and the end arc movement. The transmission rope is further an elastic rope with elasticity. The traditional transmission chain, air cylinder and hydraulic cylinder are coplanar, that is, they can only perform surface treatment actions on one surface. For a track frame that only requires simple actions, under the requirement of non-coplanarity, a large number of air cylinders or transmission chains are not required to realize the actions. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0056] Figure 1 It is a structural diagram of an H-shaped workpiece;

[0057] Figure 2 It is a top view of the installation on the machine table;

[0058] Figure 3 It is a schematic diagram of an H-shaped workpiece installed on the center support;

[0059] Figure 4 It is a schematic diagram of a spray gun processing the surface of an H-shaped workpiece;

[0060] Figure 5 It is Figure 4 The enlarged view of part A of;

[0061] Figure 6 It is a side sectional view of the steady rest;

[0062] Figure 7 It is a top view of the track frame;

[0063] Figure 8 It is a structural diagram of the bearing block;

[0064] Figure 9 It is a schematic installation diagram of the transmission rope at the top of the track frame.

[0065] In the figure: 1. Machine table frame; 2. Steady rest; 3. Spray gun; 4. Track frame; 5. Horizontal lead screw; 6. Main motor; 7. Bi-directional lead screw; 8. Sub-motor; 21. Installation block; 22. Support plate; 23. Clamping plate; 24. Side plate; 25. Fixed shell; 26. Rotating gear ring; 27. Bottom gear; 28. Driving motor; 31. Transmission pipeline; 41. Longitudinal plate; 42. Transverse plate; 43. Intermediate groove; 44. Groove rail; 45. Sliding car; 46. Driving wheel one; 47. Driving wheel two; 48. Fixed wheel; 49. Transmission rope; 410. Running motor; 411. Notch part; 412. Bearing block; 413. Horizontal wheel one; 414. Horizontal wheel two; 415. Pipe sleeve one; 416. Pipe sleeve two; 417. Connecting motor; 418. Arc-shaped support plate; 100. H-shaped workpiece; 101. Lifting hole; 102. Web; 103. Flange; Detailed implementation manners

[0066] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0067] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0068] In the ocean or coastal areas, the salt content of the water vapor is relatively high, which is commonly divided into the marine atmospheric zone, the splash zone / tidal range zone, and the fully submerged zone. The distribution situation should be related to the height above sea level. In coastal buildings, the H-shaped workpieces commonly used are mostly superstructures; in the marine atmospheric zone, good weather resistance is often considered to avoid the irradiation of ultraviolet rays or water vapor. Basically, the arc spraying material used is zinc-aluminum alloy for sacrificial anode cathodic protection with good protection effect.

[0069] Embodiment

[0070] As Figures 1 to 9 shown, it is an implementation scheme of the present invention. The arc spraying composite anti-corrosion device for steel structures in coastal climates includes an H-shaped workpiece 100, and lifting holes 101 are respectively opened at both ends of the H-shaped workpiece 100. It further includes:

[0071] Machine table frame 1, on which a clamping assembly, a driving assembly and a spraying assembly are respectively installed;

[0072] Clamping assembly, including a center frame 2, inside which an installation block 21 is arranged. The installation blocks 21 are arranged in multiple groups and each is provided with a first installation hole. A fixture is installed on the installation block 21, and the fixture is suitable for installing and clamping an H-shaped workpiece 100;

[0073] Driving assembly, including a rotating mechanism and an external power supply, and the rotating mechanism is suitable for driving the rotation of the workpiece under the external power supply;

[0074] Spraying assembly, including a spray gun 3 and an orbital frame 4. The orbital frame 4 includes an arc-shaped bottom, and a driving member is installed on the top of the orbital frame 4. The driving member is suitable for driving the spray gun 3 to move on the arc-shaped bottom.

[0075] The structure of the spray gun 3 adopts the existing technology. Basically, it is a wire feeding structure that pushes the metal wire, generates an arc through short circuit, and sprays through compressed air to generate a spraying beam for spraying.

[0076] Refer to Figure 6 As shown, the fixture includes a support plate 22, a clamping plate 23 and a side plate 24. The clamping plate 23 is fixedly connected to the side plate 24 and the support plate 22 respectively. The support plate 22 is provided with a second installation hole adapted to the first installation hole. The support plate 22 is detachably connected to the installation block 21;

[0077] The H-shaped workpiece 100 includes an H-shaped steel, and the H-shaped steel includes a web 102 and flanges 103 located on both sides of the web 102. The shape of the clamping plate 23 is suitable for fitting with the concave cavity formed by the connection of the flanges 103 and the web 102, and support plates 22 are installed on both sides of the clamping plate 23;

[0078] The side plate 24 is a bent plate, and an installation positioning hole is provided on the bent plate. There are four groups of installation blocks 21 and they are distributed in a rectangular shape. The number of support plates 22 corresponds to that of the installation blocks 21. There are two groups of clamping plates 23 and they are installed on the upper and lower sides of the H-shaped workpiece 100. Side plates 24 are installed on both sides of the clamping plates 23 on the upper and lower sides respectively, and locking bolts are installed and locked in two groups of positioning holes.

[0079] Refer to Figure 6As shown in the figure, the center frame 2 includes a fixed housing 25. A cavity is provided inside the fixed housing 25. A rotating toothed ring 26 is installed inside the cavity. The rotating toothed ring 26 is adapted to rotate inside the cavity. The inner wall of the rotating toothed ring 26 is fixedly connected to the mounting block 21. Two sets of corresponding supporting bottom gears 27 are installed at the bottom of the rotating toothed ring 26. There are two sets of bottom gears 27 and they are respectively located on both sides of the vertical axis of the rotating toothed ring 26. A driving motor 28 is installed at one set of bottom gears 27. The output shaft of the driving motor 28 is coaxially connected to the corresponding bottom gear 27. The driving motor 28 is adapted to drive the bottom gear 27 to drive the rotating toothed ring 26 to rotate.

[0080] As Figure 7 shown in the figure, two sets of track frames 4 are respectively installed on both sides of the center frame 2; The track frame 4 includes a longitudinal plate 41 and a transverse plate 42. The tops of the longitudinal plate 41 and the transverse plate 42 are adapted to form a "T" shape. Both the longitudinal plate 41 and the transverse plate 42 are frame plates. The length of the longitudinal plate 41 is greater than the length of the transverse plate 42;

[0081] Both the longitudinal plate 41 and the transverse plate 42 are provided with intermediate grooves 43 and they are connected. The intermediate groove 43 is in a "T" shape. Both sides of the inner wall of the longitudinal plate 41 are provided with groove rails 44 and a sliding carriage 45 is installed between the two sets of groove rails 44. A spray gun 3 is installed inside the sliding carriage 45. The spray gun 3 is adapted to perform arc spraying processing on the H-shaped workpiece 100 downward.

[0082] A first driving wheel 46 and a second driving wheel 47 are respectively arranged at both longitudinal ends of the longitudinal plate 41. A fixed wheel 48 is installed on the sliding carriage 45. The fixed wheel 48 is adapted to be installed at the upper end of the sliding carriage 45. One end of a transmission rope 49 is installed on the fixed wheel 48. The other end of the transmission rope 49 is adapted to be wound around the first driving wheel 46 and the second driving wheel 47 and fixed on the sliding carriage 45; A fixed frame is installed on the fixed wheel 48. An operating motor 410 is installed on the fixed frame. The output shaft of the operating motor 410 is fixedly connected to the fixed wheel 48. The operating motor 410 is adapted to drive the sliding carriage 45 to move along the longitudinal plate 41.

[0083] As Figure 7 shown in the figure, a notch portion 411 is provided on the sliding carriage 45. The notch portion 411 is adapted to be opened towards one side of the transverse plate 42. A bearing block 412 is installed on the notch portion 411. The bearing block 412 is adapted to be detachably connected to the notch portion 411. The spray gun 3 is installed under the notch portion 411. The spray gun 3 includes a transmission pipeline 31. The transmission pipeline 31 is installed at the upper end of the bearing block 412;

[0084] Both the top and the bottom of the transverse plate 42 are arc-shaped. A first rotating shaft is installed at one end of the transverse plate 42 far from the longitudinal plate 41. A first transverse wheel 413 is installed at the top of the first rotating shaft. A second rotating shaft is installed on the sliding carriage 45 and a second transverse wheel 414 is installed at the top;

[0085] A transmission rope 49 is installed on the horizontal wheel one 413. A pipe sleeve one 415 is hingedly installed on the transmission rope 49. The pipe sleeve one 415 is adapted to be sleeved on the transmission pipeline 31. A limiting ring is fixedly installed on the transmission pipeline 31. The limiting ring is adapted to limit the position of the pipe sleeve one 415 on the transmission pipeline 31.

[0086] A transmission rope 49 is installed on the horizontal wheel two 414. A pipe sleeve two 416 is hingedly installed on the transmission rope 49. The pipe sleeve two 416 is adapted to be sleeved on the transmission pipeline 31 and located between the limiting ring and the pipe sleeve one 415. Connecting motors 417 are installed on both the horizontal wheel one 413 and the horizontal wheel two 414. The two groups of connecting motors 417 are adapted to drive the horizontal wheel one 413 and the horizontal wheel two 414 to rotate respectively.

[0087] Arc-shaped support plates 418 are arranged on both sides of the bearing block 412. Arc-shaped grooves are arranged in the horizontal plate 42. The arc-shaped support plates 418 are adapted to slide in the arc-shaped grooves.

[0088] A horizontal lead screw 5 and a main motor 6 are installed on the machine platform frame 1. The center frame 2 is installed on the horizontal lead screw 5. The main motor 6 and the horizontal lead screw 5 are adapted to be connected by a coupling and are adapted to drive the center frame 2 to move by rotating the horizontal lead screw 5.

[0089] Two groups of track frames 4 are arranged and installed on both sides of the center frame 2. The two groups of track frames 4 are symmetrically arranged. A bidirectional lead screw 7 is installed at the bottom of the track frame 4. Two groups of bidirectional lead screws 7 are arranged and located on both sides of the horizontal lead screw 5. A sub-motor 8 is installed outside the bidirectional lead screw 7. The sub-motor 8 is adapted to drive the two groups of track frames 4 on the bidirectional lead screw 7 to move.

[0090] The spraying method of the arc spraying composite anti-corrosion device for steel structures in coastal climates includes the following steps:

[0091] Step 1, select and match coating materials

[0092] Based on the fact that most of the steel structures in coastal structures are in the marine atmosphere area or the splash zone, zinc-aluminum alloy is used as the metal coating for arc spraying, and then the primer layer, intermediate layer and topcoat layer are applied by brushing.

[0093] For the primer layer, epoxy asphalt coating or nano-modified epoxy sealing coating is used.

[0094] For the intermediate layer, one or more of zinc-rich paint, phenolic resin paint and alkyd resin paint are used.

[0095] For the topcoat layer, nano-modified fluorinated polyurethane coating or nano-modified fluorinated polysiloxane coating is used.

[0096] Step 2, hoisting and installation

[0097] The surface of the H-shaped workpiece 100 is sandblasted to achieve a surface cleanliness level of Sa2.5 or Sa3, and the surface roughness should reach Rz25 - 100 μm. A lifting ring is installed on the lifting hole 101 and lifted and installed onto the lifting hole 101, with one end inserted into the center rest 2. A fixture is installed inside the center rest 2. The side plate 24 in the fixture installs locking bolts through the positioning holes and installs the fixture shape adapted to the H-shaped workpiece 100 through a combined assembly method. Adjust the H-shaped workpiece 100 inside the actual installed fixture to a horizontal state, with a vertical cross-section in the shape of "H". One end of the H-shaped workpiece 100 is inserted into the fixture, release one end of the lifting ring, and install a lifting ring again on the other side of the center rest 2 to ensure that the H-shaped workpiece is balanced and installed on the center rest 2;

[0098] Step Three: Spray the web 102

[0099] Move the track frame 4 and position the spray gun 3 on both sides of the center rest 2. Then, the spray gun 3 on the center rest 2 slides from the set starting point, the sliding carriage 45 moves longitudinally, and the track frame 4 steadily moves towards both sides on the bidirectional lead screw 7, causing the arc spraying to reciprocally spray on the web 102;

[0100] Step Four: Spray the flange 103

[0101] When spraying on one side of the web 102, set the rotation angle A of the rotating gear ring 26. Taking the rotation angle A as the positive direction, make the spraying range of the spray gun 3 cover the side of the flange 103 relative to the web 102 and spray, and then rotate and spray on the side of the flange 103 facing away from the web 102;

[0102] Rotate in the reverse direction by an angle of 2A, move the sliding carriage 45 to the other side of the longitudinal plate 41, and spray on the flange 103 on the other side of the web 102;

[0103] Return to the horizontal state, rotate another 180°, and spray on the other side of the web 102; then rotate the rotation angle A of the rotating gear ring 26 to make the spraying range of the spray gun 3 cover the side of the flange 103 relative to the web 102;

[0104] Rotate in the reverse direction by an angle of 2A, move the sliding carriage 45 to the other side of the longitudinal plate 41, and spray on the flange 103 on the other side of the web 102;

[0105] Step Five: Spray on both sides

[0106] At both ends of the H-shaped workpiece 100, the spray gun 3 needs to rotate by an angle B, and the rotation angle of the arc-shaped bottom on the track frame 4 is suitable for the spray gun 3 to rotate by the angle B for operation; when the sliding vehicle 45 reaches the connection between the longitudinal plate 41 and the transverse plate 42 in the middle groove 43, the first transverse wheel 413 drives and rotates, causing the bearing block 412 installed in the notch 411 to move towards the transverse plate 42. The arc-shaped support plate 418 on the bearing block 412 moves along the arc-shaped groove until the rotation angle conforms to the rotation angle B, and then spraying starts, and the central frame 2 rotates 360°;

[0107] The two groups of track frames 4 move synchronously from the center to the outside;

[0108] Step 6: Install a lifting ring at the lifting hole 101 and remove the fixture. Then, the central frame 2 moves towards a group of track frames 4. After completely moving to the already sprayed area, the spray gun 3 on the other group of track frames 4 performs the spraying actions of repeating Steps 3 and 4 to spray the position before the central frame 2 moves;

[0109] Step 7: After spraying is completed, reverse and repeat the steps of Step 2, take out the H-shaped workpiece 100, and place it for static settlement;

[0110] At room temperature, the primer layer is left to stand for 8 - 12 hours, with a thickness of 20 - 60 μm; the intermediate layer is left to stand for 4 hours, with a thickness of 50 - 100 μm; the topcoat layer is left to stand for more than 24 hours, with a thickness of 80 - 120 μm;

[0111] Repeat processing Steps 1 to 6 to complete the processing of the primer layer, intermediate layer, and topcoat.

[0112] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention.

[0113] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Coastal climate steel structure arc spraying composite anti-corrosion device, including an H-shaped workpiece (100), and hoisting holes (101) are respectively opened at both ends of the H-shaped workpiece (100). It is characterized in that It also includes: A machine platform frame (1), on which a clamping assembly, a driving assembly and a spraying assembly are respectively installed; The clamping assembly includes a center frame (2), an installation block (21) is arranged inside the center frame (2), multiple groups of the installation blocks (21) are provided and all are provided with a first installation hole, a clamp is installed on the installation block (21), and the clamp is suitable for installing and clamping the H-shaped workpiece (100); The driving assembly includes a rotating mechanism and an external power supply, and the rotating mechanism is suitable for driving the rotation of the workpiece under the external power supply; The spraying assembly includes a spray gun (3) and a track frame (4), the track frame (4) includes an arc-shaped bottom, a driving member is installed on the top of the track frame (4), the driving member is suitable for driving the spray gun (3) to move on the arc-shaped bottom, and the spray gun (3) is suitable for spraying on the surface and both ends of the H-shaped workpiece (100); Two groups of track frames (4) are respectively installed on both sides of the center frame (2); the track frame (4) includes a longitudinal plate (41) and a transverse plate (42), the tops of the longitudinal plate (41) and the transverse plate (42) are suitable for forming a "T" shape, both the longitudinal plate (41) and the transverse plate (42) are frame plates, and the length of the longitudinal plate (41) is greater than the length of the transverse plate (42); Both the longitudinal plate (41) and the transverse plate (42) are provided with a middle groove (43) and are connected, both sides of the inner wall of the longitudinal plate (41) are provided with groove rails (44), and a sliding vehicle (45) is installed between the two groove rails (44), a spray gun (3) is installed inside the sliding vehicle (45), and the spray gun (3) is suitable for spraying the H-shaped workpiece (100) downward by arc spraying; A first driving wheel (46) and a second driving wheel (47) are respectively arranged at both longitudinal ends of the longitudinal plate (41), a fixed wheel (48) is installed on the sliding vehicle (45), the fixed wheel (48) is suitable for being installed at the upper end of the sliding vehicle (45), one end of a transmission rope (49) is installed on the fixed wheel (48), and the other end of the transmission rope (49) is suitable for being wound around the first driving wheel (46) and the second driving wheel (47) and fixed on the sliding vehicle (45); A fixed frame is installed on the fixed wheel (48), a running motor (410) is installed on the fixed frame, an output shaft of the running motor (410) is fixedly connected to the fixed wheel (48), and the running motor (410) is suitable for driving the sliding vehicle (45) to move along the longitudinal plate (41); A notch portion (411) is provided on the sliding vehicle (45). The notch portion (411) is adapted to be opened towards one side of the transverse plate (42). A bearing block (412) is installed on the notch portion (411). The bearing block (412) is adapted to be detachably connected to the notch portion (411). The spray gun (3) is installed under the notch portion (411). The spray gun (3) includes a transmission pipeline (31). The transmission pipeline (31) is installed at the upper end of the bearing block (412). The top and bottom of the transverse plate (42) are both arc-shaped. A first rotating shaft is installed at one end of the transverse plate (42) away from the longitudinal plate (41). A first transverse wheel (413) is installed at the top of the first rotating shaft. A second rotating shaft is installed on the sliding vehicle (45) and a second transverse wheel (414) is installed at the top. A transmission rope (49) is installed on the first transverse wheel (413). A first pipe sleeve (415) is hingedly installed on the transmission rope (49). The first pipe sleeve (415) is adapted to be sleeved on the transmission pipeline (31). A limiting ring is fixedly installed on the transmission pipeline (31). The limiting ring is adapted to limit the position of the first pipe sleeve (415) on the transmission pipeline (31). A transmission rope (49) is installed on the second transverse wheel (414). A second pipe sleeve (416) is hingedly installed on the transmission rope (49). The second pipe sleeve (416) is adapted to be sleeved on the transmission pipeline (31) and is located between the limiting ring and the first pipe sleeve (415). Connecting motors (417) are installed on both the first transverse wheel (413) and the second transverse wheel (414). The two groups of connecting motors (417) are adapted to drive the first transverse wheel (413) and the second transverse wheel (414) to rotate respectively. Arc-shaped support plates (418) are provided on both sides of the bearing block (412). An arc-shaped groove is provided inside the transverse plate (42). The arc-shaped support plates (418) are adapted to slide in the arc-shaped groove.

2. The coastal climate steel structure arc spraying composite anti-corrosion device according to claim 1, characterized in that: The fixture includes a support plate (22), a clamping plate (23) and a side plate (24). The clamping plate (23) is fixedly connected to the side plate (24) and the support plate (22) respectively. An installation hole two adapted to be matched with the installation hole one is provided on the support plate (22). The support plate (22) is detachably connected to the installation block (21). The H-shaped workpiece (100) includes a web (102) and flanges (103) located on both sides of the web (102). The shape of the clamping plate (23) is adapted to be matched with the shape of the cavity formed by connecting the flanges (103) and the web (102). Support plates (22) are installed on both sides of the clamping plate (23). The side plate (24) is a bent plate, and an installation positioning hole is provided on the bent plate.

3. The coastal climate steel structure arc spraying composite anti-corrosion device according to claim 2, characterized in that: There are four sets of the mounting blocks (21) which are rectangularly distributed. The number of the support plates (22) corresponds to that of the mounting blocks (21). There are two sets of the clamping plates (23) which are installed on the upper and lower sides of the H-shaped workpiece (100). Side plates (24) are respectively installed on both sides of the clamping plates (23) on the upper and lower sides, and locking bolts are installed and locked in two sets of positioning holes correspondingly.

4. The coastal climate steel structure arc spraying composite anti-corrosion device according to claim 3, characterized in that: The center frame (2) includes a fixed shell (25). A cavity is formed in the fixed shell (25). A rotating gear ring (26) is installed in the cavity. The rotating gear ring (26) is adapted to rotate in the cavity. The inner wall of the rotating gear ring (26) is fixedly connected to the mounting block (21). Two sets of corresponding supporting bottom gears (27) are installed at the bottom of the rotating gear ring (26). There are two sets of the bottom gears (27) which are respectively located on both sides of the vertical axis of the rotating gear ring (26). A driving motor (28) is installed at one set of the bottom gears (27). The output shaft of the driving motor (28) is coaxially connected to the corresponding bottom gear (27) and drives the rotating gear ring (26) to rotate.

5. The coastal climate steel structure arc spraying composite anti-corrosion device according to claim 4, characterized in that: A transverse lead screw (5) and a main motor (6) are installed on the machine table frame (1). The center frame (2) is installed on the transverse lead screw (5). The main motor (6) and the transverse lead screw (5) are adapted to be connected by a coupling and are adapted to drive the center frame (2) to move by rotating the transverse lead screw (5).

6. The coastal climate steel structure arc spraying composite anti-corrosion device according to claim 5, characterized in that: Two sets of the track frames (4) are symmetrically arranged. A bidirectional lead screw (7) is installed at the bottom of the track frame (4). There are two sets of the bidirectional lead screws (7) which are located on both sides of the transverse lead screw (5). A sub-motor (8) is installed outside the bidirectional lead screw (7). The sub-motor (8) is adapted to drive the two sets of track frames (4) on the bidirectional lead screw (7) to move.

7. A spraying method for the coastal climate steel structure arc spraying composite anti-corrosion device according to claim 6, characterized in that it includes the following steps: Step 1, select and match coating materials Based on the fact that most of the steel structures in coastal structures are in the marine atmospheric zone or the splash zone, zinc-aluminum alloy is used as the metal coating for arc spraying, and then a primer layer, an intermediate layer and a topcoat layer are applied by brushing; For the primer layer, epoxy asphalt paint or nano-modified epoxy sealing paint is used; For the intermediate layer, one or more of zinc-rich paint, phenolic resin paint and alkyd resin paint are used; For the topcoat layer, nano-modified fluorinated polyurethane paint or nano-modified fluorinated polysiloxane paint is used; Step 2, hoisting and installation The surface of the H-shaped workpiece (100) is sandblasted to achieve a surface cleanliness level of Sa2.5 or Sa3, and the surface roughness should reach Rz25 - 100 μm. A lifting ring is installed on the lifting hole (101) and is lifted and installed onto the lifting hole (101), with one end inserted into the center rest (2); a fixture is installed inside the center rest (2). The side plate (24) in the fixture is installed with locking bolts through the positioning holes, and the fixture shape adapted to the H-shaped workpiece (100) is installed by combined assembly. Adjust the H-shaped workpiece (100) inside the actually installed fixture to be horizontal, with a vertical cross-section in the shape of "H". One end of the H-shaped workpiece (100) is inserted into the fixture, release one end of the lifting ring, and install a lifting ring again on the other side of the center rest (2) to ensure that the H-shaped workpiece is balanced and installed on the center rest (2). Step 3: Spray the web (102) Move the track frame (4) to make the spray gun (3) located on both sides of the center rest (2). Then, the spray gun (3) on the center rest (2) slides from the set starting point, and the sliding carriage (45) moves longitudinally. The track frame (4) steadily moves towards both sides on the bidirectional lead screw (7) to make the arc spraying reciprocally spray on the web (102). Step 4: Spray the flange (103) When spraying on one side of the web (102), set the rotation angle A of the rotating toothed ring (26). Taking the rotation angle A as the positive direction, make the spraying range of the spray gun (3) cover the side of the flange (103) relative to the web (102) and spray. Then rotate and spray on the side of the flange (103) facing away from the web (102). Rotate in the reverse direction by an angle of 2A, move the sliding carriage (45) to the other side of the longitudinal plate (41), and spray on the flange (103) on the other side of the web (102). Return to the horizontal state, rotate another 180°, and spray on the other side of the web (102). Then rotate the rotation angle A of the rotating toothed ring (26) to make the spraying range of the spray gun (3) cover the side of the flange (103) relative to the web (102). Rotate in the reverse direction by an angle of 2A, move the sliding carriage (45) to the other side of the longitudinal plate (41), and spray on the flange (103) on the other side of the web (102). Step 5: Spray on both sides At both ends of the H-shaped workpiece (100), the spray gun (3) needs to rotate by an angle B, and the rotation angle of the arc bottom on the track frame (4) is suitable for the spray gun (3) to rotate by angle B for operation; when the sliding carriage (45) reaches the connection between the longitudinal plate (41) and the transverse plate (42) in the middle groove (43), the first transverse wheel (413) drives the rotation and makes the bearing block (412) installed in the notch part (411) move towards the transverse plate (42). The arc-shaped support plate (418) on the bearing block (412) moves along the arc-shaped groove until the rotation angle conforms to the rotation angle B, and then starts spraying, and the center rest (2) rotates 360°. The two groups of track frames (4) move synchronously from the center to the outside. Step 6: Install a lifting ring at the lifting hole (101) and remove the fixture. Then, move the rear center frame (2) towards a set of track frames (4). After it is completely moved to the painted area, the spray gun (3) on the other set of track frames (4) performs the spraying actions in Steps 3 and 4 to spray the position where the center frame (2) was before moving. Step 7: After spraying is completed, reverse the steps in Step 2, take out the H-shaped workpiece (100), and place it for static settlement. At room temperature, the primer layer is left to stand for 8 - 12 hours with a thickness of 20 - 60 μm; the intermediate layer is left to stand for 4 hours with a thickness of 50 - 100 μm; the topcoat layer is left to stand for more than 24 hours with a thickness of 80 - 120 μm. Repeat Processing Steps 1 to 6 to complete the processing of the primer layer, intermediate layer, and topcoat.

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