Rust-proof spraying equipment and spraying process for steel structural parts

Abstract

The invention discloses rust-proof spraying equipment and a spraying process for steel structural parts, and relates to the field of rust prevention, the rust-proof spraying equipment comprises a material box, a mounting frame and a supporting frame, the mounting frame is located on one side of the material box, the supporting frame is located on the other side of the material box, and a spraying pump is fixedly mounted at the upper end of the mounting frame; and a delivery pipe is fixedly mounted at the input end of the spraying pump. According to the rust-proof spraying equipment for the steel structural parts and the spraying technology, multi-angle spraying of workpieces is achieved, the equipment can adapt to the steel structural parts of different sizes and different shapes, multi-angle and all-directional spraying operation is completed, the spraying head is installed through the universal joint type connecting clamp capable of being rapidly detached, replacement and maintenance are convenient, and the spraying efficiency is improved. When it is detected that the distance between the nozzle and the surface of the workpiece is changed, the system can automatically and finely adjust spraying parameters so as to maintain constant spraying impact force and coating covering density, and the problem that the thickness of a coating is not uniform due to workpiece surface fluctuation or nozzle track fluctuation is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of rust prevention, and in particular to a rust-proof spraying equipment and spraying process for steel structural components. Background Technology

[0002] Rust-proof spraying equipment for steel structures is used to spray coatings onto the surface of steel structures. Steel is extremely prone to electrochemical corrosion in humid and corrosive environments, which seriously affects the safety and durability of the structure. Therefore, effective rust-proof coating protection for steel structures is a crucial post-processing step.

[0003] However, when using rust-proofing spraying equipment for steel structures, most fixed or simple mobile spraying equipment cannot flexibly adapt to workpieces of different sizes and complex shapes. The spraying path often requires manual instruction or is based on a simple model. For multi-angle and all-round spraying needs, it is often necessary to manually adjust the workpiece posture or equipment position multiple times, resulting in low production efficiency and difficulty in ensuring consistency. The convenience of equipment maintenance is also often overlooked, and nozzle replacement and cleaning are cumbersome, affecting the continuity of operation. Secondly, in terms of process control precision, most existing spraying process parameters rely on the operator's experience to preset and keep them constant during the spraying process. When the workpiece surface is uneven or there are slight fluctuations in the spray gun trajectory, changes in the spraying distance will lead to significant differences in the coating atomization effect, adhesion efficiency, and deposition thickness, which can easily produce defects such as uneven coating thickness, sagging, or missed coating, directly affecting the uniformity, appearance, and integrity of the overall anti-corrosion barrier. Meanwhile, in terms of quality assurance and process optimization, coating thickness detection is usually done offline after spraying and curing, which is lagging. Once insufficient thickness is found, rework and touch-up are costly and inefficient, and may damage the formed coating. There is a lack of effective correlation and integration between spraying parameters, workpiece posture and final coating quality data in the production process, making it difficult to achieve data-based process fine adjustment and predictive optimization, which restricts the stable improvement of production quality. Summary of the Invention

[0004] The main objective of this invention is to provide a rust-proof spraying equipment and spraying process for steel structural components, which can effectively solve the technical problems raised in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A rust-proofing spraying device for steel structural components includes a material box, a mounting frame, and a support frame. The mounting frame is located on one side of the material box, and the support frame is located on the other side of the material box. A spraying pump is fixedly installed on the upper end of the mounting frame. An outlet pipe is fixedly installed on the input end of the spraying pump, and a delivery pipe is fixedly installed on the output end of the spraying pump. A spraying structure is movably installed on the upper outer side of the support frame, and two second fixing sleeves are movably installed on the lower outer side of the support frame. A second mounting rod is welded between the two second fixing sleeves, and a connecting sleeve is fixedly installed on the outer side of the second mounting rod. A processing and placement frame is fixedly installed on the upper end of the connecting sleeve.

[0007] Preferably, the end of the outlet pipe away from the spray pump is fixedly connected to one side of the upper end of the material box, and a return pipe is fixedly installed on the other side of the upper end of the material box.

[0008] Preferably, a control valve is fixedly installed on one side of the upper end of the support frame, an inlet pipe is fixedly installed at the output port of the control valve, the end of the delivery pipe away from the spray pump is fixedly connected to the input port of the control valve, and the upper end of the return pipe is fixedly connected to the control valve.

[0009] Preferably, the spraying structure includes a first fixed sleeve, a first mounting rod, a fixed clamp, a connecting clamp, and a spray head. Two first fixed sleeves are fixedly installed on the outside of the support frame, the first mounting rod is welded to the middle of the two first fixed sleeves, the fixed clamp is fixedly installed on the outside of the first mounting rod, the connecting clamp is fixedly installed at the lower end of the fixed clamp, and the spray head is fixedly installed on one side of the connecting clamp.

[0010] Preferably, the inlet pipe is fixedly connected to the nozzle, and the nozzle is located above the processing and placement frame.

[0011] A spraying process for a rust-proof spraying equipment for steel structural components, the process specifically includes the following steps:

[0012] Step 1: Pre-treatment and fixing of the workpiece. The steel structure to be sprayed is surface treated to ensure that it is free of oil and rust and reaches a cleanliness level of Sa2.5. The treated workpiece is placed on the processing rack and fixed. The rust inhibitor in the material box is a two-component epoxy zinc-rich primer. Its raw materials include, by mass percentage: 30-40% epoxy resin, 50-60% zinc powder, 2-4% thixotropic agent, 1-2% anti-settling agent and the balance mixed solvent. Before spraying, the epoxy resin and solvent of component A are mixed with the curing agent of component B in a ratio of 4:1 and placed in the material box and stirred evenly.

[0013] Step 2: Equipment self-check and parameter preset. Start the equipment, circulate and preheat the pipeline. The control system is set to 80-120μm according to the workpiece type and target dry film thickness, and automatically calculates and sets the reference flow rate, pressure and estimated number of spraying passes of the spraying pump.

[0014] Step 3: Adaptive spraying trajectory planning and execution. The control system drives the nozzle to move and sprays according to the planned path. During this process, a real-time distance sensor is integrated to dynamically detect the distance between the nozzle and the workpiece surface and feed it back to the control system. The control system dynamically fine-tunes the spraying parameters based on the real-time distance to ensure uniform spraying.

[0015] Step 4: Multi-angle collaborative spraying. After completing the spraying of one angle, rotate the workpiece to the next angle and adjust the spraying position to ensure that the nozzle is always perpendicular to the surface to be sprayed before proceeding with the next spraying. Repeat this process 2-4 times to ensure that all surfaces are covered and the coating is uniform.

[0016] Step 5: Closed-loop quality control and curing. After spraying, the workpiece is measured online using a coating thickness gauge integrated into the equipment. The control system requires that the dry film thickness at all measurement points must reach more than 80μm, and the thickness of key corners and weld anti-corrosion areas must reach 100-120μm. Areas that do not meet the standards are targeted for re-spraying. After passing the quality inspection, the workpiece is moved to the curing area and cured at 25°C for 24 hours, or forced to cure at 60°C for 2 hours to achieve complete film formation.

[0017] Step Six: Post-treatment and cleaning. Switch the control valve to the cleaning circuit and use a special cleaning solvent to automatically clean the pipeline and nozzles for the next use.

[0018] Preferably, in step three, the real-time distance sensing and pressure / flow fine-tuning constitute a closed-loop control. The control logic is as follows: when the sensor detects an increase in distance, the spray pump pressure and control valve opening are increased according to a preset ratio; when the distance decreases, they are adjusted accordingly to maintain a constant spray impact force and coverage density.

[0019] Preferably, in step four, the nozzle is connected to the fixed sleeve via a connecting clamp. The connecting clamp is a quick-detachable universal joint structure, which allows the spray flow path to be sealed and the electrical and signal lines to be quickly connected even when changing nozzles of different specifications.

[0020] Preferably, the coating thickness detection data in step five, the spraying path planning data in step three, and the angle rotation data in step four are fused in the control system to form a three-dimensional digital coating model of the workpiece. This model can be used for process optimization, quality traceability, and to provide a predictive benchmark for adaptive spraying parameters for subsequent workpieces in the same batch.

[0021] Preferably, the material tank is equipped with a liquid level and temperature sensor and a stirring device. In step two, the system reads the temperature of the rust inhibitor and controls it to be maintained within the optimal spraying temperature range of 20-30℃. The raw material formula of the rust inhibitor can be adapted to the working environment: for C5 high-corrosion environments, the zinc powder mass percentage is set at the upper limit of 60%, and an additional 1-2% phosphate passivator is added to ensure that the coating has higher cathodic protection performance and barrier effect. The stirring device is started regularly before spraying and during the spraying interval to ensure uniform material distribution.

[0022] The beneficial effects achievable by the above embodiments of the present invention include: the equipment achieves flexible and precise positioning of the nozzle in three-dimensional space through a first fixed sleeve, a second fixed sleeve, and a horizontally movable fixed clamp, which can lift and lock the nozzle; at the same time, the connecting sleeve drives the processing and placement frame to rotate, enabling multi-angle spraying of the workpiece. This allows the equipment to adapt to steel structural parts of different sizes and shapes, and complete multi-angle and all-round spraying operations. Furthermore, the nozzle is installed through a quick-disassembly universal joint type connecting clamp, which is convenient for replacement and maintenance. The material box is equipped with stirring and temperature control functions to ensure that the coating is always in a uniform and optimal construction temperature range, thus ensuring the stability of the spraying quality from the raw material end. In addition, after the process is completed, it can automatically switch to the cleaning circuit, which is convenient for equipment maintenance and ensures that the starting conditions for the next spraying are consistent.

[0023] The process integrates real-time distance sensing technology and forms a closed-loop control with the pressure of the spray pump and the opening of the control valve. When the system detects a change in the distance between the nozzle and the workpiece surface, it can automatically fine-tune the spraying parameters to maintain a constant spraying impact force and coating coverage density. This effectively overcomes the problem of uneven coating thickness caused by workpiece surface undulations or nozzle trajectory fluctuations, ensuring high uniformity and overall consistency of the coating from the perspective of process principle.

[0024] By integrating an online coating thickness gauge after spraying and automatically positioning and re-spraying areas that do not meet the standards, the dry film thickness is ensured to be 100% qualified. At the same time, the system integrates thickness data, spraying path data, and workpiece rotation angle data to generate a three-dimensional digital coating model of the workpiece. This model can not only be used for quality traceability of a single product, but also provide a benchmark for predicting spraying parameters for subsequent workpieces in the same batch, realizing continuous data accumulation and adaptive optimization of the process, thereby improving overall production quality and efficiency.

[0025] The formulation can be adapted to different corrosive environments, such as increasing the zinc powder content to the upper limit and adding phosphate passivating agents. This standard-based raw material system and adjustable formulation design make the corrosion protection performance both reliable and targeted, meeting the needs of different harsh environments. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the overall structure of a rust-proof spraying device for steel structural components according to the present invention;

[0027] Figure 2 This is a rear view of a rust-proof spraying device for steel structural components according to the present invention;

[0028] Figure 3 This is a bottom view of the support frame in a steel structure anti-rust spraying equipment according to the present invention;

[0029] Figure 4 This is a flowchart of the spraying process for a rust-proof spraying equipment for steel structural components according to the present invention.

[0030] In the diagram: 1. Material box; 2. Mounting frame; 3. Spray pump; 4. Outlet pipe; 5. Conveying pipe; 6. Support frame; 7. Control valve; 8. Return pipe; 9. Inlet pipe; 10. Spraying structure; 11. First fixing sleeve; 12. First mounting rod; 13. Fixing clamp; 14. Connecting fixture; 15. Spray nozzle; 16. Second fixing sleeve; 17. Second mounting rod; 18. Connecting sleeve; 19. Processing and placement frame. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figures 1-3 As shown, a steel structure anti-rust spraying equipment includes a material box 1, a mounting frame 2, and a support frame 6. The mounting frame 2 is located on one side of the material box 1, and the support frame 6 is located on the other side of the material box 1. A spraying pump 3 is fixedly installed on the upper end of the mounting frame 2. An outlet pipe 4 is fixedly installed on the input end of the spraying pump 3, and a conveying pipe 5 is fixedly installed on the output end of the spraying pump 3. A spraying structure 10 is movably installed on the upper outer side of the support frame 6. Two second fixing sleeves 16 are movably installed on the lower outer side of the support frame 6. A second mounting rod 17 is welded between the two second fixing sleeves 16. A connecting sleeve 18 is fixedly installed on the outer side of the second mounting rod 17, and a processing placement frame 19 is fixedly installed on the upper end of the connecting sleeve 18.

[0033] In this embodiment, the end of the outlet pipe 4 away from the spray pump 3 is fixedly connected to the upper side of the material box 1, and the other side of the upper end of the material box 1 is fixedly installed with a return pipe 8.

[0034] In this embodiment, a control valve 7 is fixedly installed on one side of the upper end of the support frame 6, an inlet pipe 9 is fixedly installed at the output port of the control valve 7, the end of the delivery pipe 5 away from the spray pump 3 is fixedly connected to the input port of the control valve 7, and the upper end of the return pipe 8 is fixedly connected to the control valve 7.

[0035] In this embodiment, the spraying structure 10 includes a first fixing sleeve 11, a first mounting rod 12, a fixing clamp 13, a connecting clamp 14, and a spray head 15. The two first fixing sleeves 11 are fixedly installed on the outside of the support frame 6. The first mounting rod 12 is welded to the middle of the two first fixing sleeves 11. The fixing clamp 13 is fixedly installed on the outside of the first mounting rod 12. The connecting clamp 14 is fixedly installed at the lower end of the fixing clamp 13. The spray head 15 is fixedly installed on one side of the connecting clamp 14.

[0036] In this embodiment, the inlet pipe 9 is fixedly connected to the nozzle 15, and the nozzle 15 is located above the processing placement frame 19.

[0037] Specifically, the workpieces to be sprayed are placed above the processing rack 19. Rust inhibitor is stored in the material box 1. The operation of the spraying pump 3 extracts the rust inhibitor from the material box 1 through the outlet pipe 4, then delivers it to the control valve 7 through the delivery pipe 5, and finally inputs it to the nozzle 15 through the inlet pipe 9, so that the nozzle 15 sprays the rust inhibitor downwards, thereby spraying the steel structure above the processing rack 19 with rust inhibitor. The fixing sleeve 13 can be adjusted to the left and right position outside the first mounting rod 12 to change the spraying position of the nozzle 15. The first fixing sleeve 11 and the second fixing sleeve 16 can be raised, lowered and locked around the support frame 6 to adjust and change the spraying height of the nozzle 15 to cooperate with the spraying of steel structure parts of different heights. The connecting sleeve 18 can be rotated around the second mounting rod 17 and locked to adjust the angle of the processing rack 19 so that the steel structure parts can be sprayed at different angles.

[0038] like Figure 4 As shown, a rust-proofing spraying process for steel structural components includes the following steps:

[0039] Step 1: Pre-treatment and fixing of workpieces. The steel structural parts to be sprayed are surface treated to ensure that they are free of oil and rust and reach a cleanliness level of Sa2.5. The treated workpieces are placed on the processing rack 19 and fixed. The rust inhibitor in the material box 1 is a two-component epoxy zinc-rich primer. Its raw materials include, by mass percentage: 30-40% epoxy resin, 50-60% zinc powder, 2-4% thixotropic agent, 1-2% anti-settling agent and the balance mixed solvent. Before spraying, the epoxy resin and solvent of component A are mixed with the curing agent of component B in a ratio of 4:1 and placed in the material box 1 and stirred evenly.

[0040] Step 2: Equipment self-check and parameter preset. Start the equipment, circulate and preheat the pipeline. The control system is set to 80-120μm according to the workpiece type and target dry film thickness. It automatically calculates and sets the reference flow rate, pressure and estimated number of spraying passes of the spraying pump 3.

[0041] Step 3: Adaptive spraying trajectory planning and execution. The control system drives the nozzle 15 to move and spray according to the planned path. During this process, a real-time distance sensor is integrated to dynamically detect the distance between the nozzle 15 and the workpiece surface and feed it back to the control system. The control system dynamically fine-tunes the spraying parameters according to the real-time distance to ensure spraying uniformity.

[0042] Step 4: Multi-angle collaborative spraying. After completing the spraying of one angle, rotate the workpiece to the next angle and adjust the spraying position to ensure that the nozzle 15 is always perpendicular to the surface to be sprayed. Then, perform the next spraying. Repeat this process 2-4 times to ensure that all surfaces are covered and the coating is uniform.

[0043] Step 5: Closed-loop quality control and curing. After spraying, the workpiece is measured online using a coating thickness gauge integrated into the equipment. The control system requires that the dry film thickness at all measurement points must reach more than 80μm, and the thickness of key corners and weld anti-corrosion areas must reach 100-120μm. Areas that do not meet the standards are targeted for re-spraying. After passing the quality inspection, the workpiece is moved to the curing area and cured at 25°C for 24 hours, or forced to cure at 60°C for 2 hours to achieve complete film formation.

[0044] Step Six: Post-treatment and cleaning. Switch control valve 7 to the cleaning circuit and use a special cleaning solvent to automatically clean the pipeline and nozzle 15 for the next use.

[0045] In this embodiment, in step three, the real-time distance sensing and pressure / flow fine-tuning constitute a closed-loop control. The control logic is as follows: when the sensor detects an increase in distance, the pressure of the spray pump 3 and the opening of the control valve 7 are increased according to a preset ratio; when the distance decreases, they are adjusted accordingly to maintain a constant spraying impact force and coverage density.

[0046] In this embodiment, in step four, the nozzle 15 is connected to the fixed sleeve 13 via the connecting clamp 14. The connecting clamp 14 is a quick-detachable universal joint structure, which allows the spray flow path to be sealed and the electrical and signal lines to be quickly connected even when replacing nozzles 15 of different specifications.

[0047] In this embodiment, the coating thickness detection data in step five, the spraying path planning data in step three, and the angle rotation data in step four are fused in the control system to form a three-dimensional digital coating model of the workpiece. This model can be used for process optimization, quality traceability, and to provide a predictive benchmark for adaptive spraying parameters for subsequent workpieces in the same batch.

[0048] In this embodiment, the material tank 6 is equipped with a liquid level and temperature sensor and a stirring device. In step two, the system reads the temperature of the rust inhibitor and controls it to be maintained in the optimal spraying temperature range of 20-30℃. The raw material formula of the rust inhibitor can be adapted to the working environment: for C5 high-corrosion environment, the zinc powder mass percentage is set at the upper limit of 60%, and an additional 1-2% phosphate passivator is added to ensure that the coating has higher cathodic protection performance and barrier effect. The stirring device is started regularly before spraying and during the spraying interval to ensure uniform material.

[0049] In the embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and other division methods may exist in actual implementation. Modules described as separate components may or may not be physically separated, and components shown as modules may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of the method in this embodiment according to actual needs.

[0050] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A rust-proof spraying device for steel structural components, comprising a material box (1), a mounting frame (2), and a support frame (6), wherein the mounting frame (2) is located on one side of the material box (1), and the support frame (6) is located on the other side of the material box (1), characterized in that: A spraying pump (3) is fixedly installed at the upper end of the mounting bracket (2). A discharge pipe (4) is fixedly installed at the input end of the spraying pump (3). A delivery pipe (5) is fixedly installed at the output end of the spraying pump (3). A spraying structure (10) is movably installed on the upper outer side of the support frame (6). Two second fixing sleeves (16) are movably installed on the lower outer side of the support frame (6). A second mounting rod (17) is welded between the two second fixing sleeves (16). A connecting sleeve (18) is fixedly installed on the outer side of the second mounting rod (17). A processing placement frame (19) is fixedly installed at the upper end of the connecting sleeve (18).

2. The anti-rust spraying equipment for steel structural components according to claim 1, characterized in that: The end of the outlet pipe (4) away from the spray pump (3) is fixedly connected to one side of the upper end of the material box (1), and the other side of the upper end of the material box (1) is fixedly installed with a return pipe (8).

3. The anti-rust spraying equipment for steel structural components according to claim 2, characterized in that: A control valve (7) is fixedly installed on one side of the upper end of the support frame (6). An inlet pipe (9) is fixedly installed at the output port of the control valve (7). The end of the delivery pipe (5) away from the spray pump (3) is fixedly connected to the input port of the control valve (7). The upper end of the return pipe (8) is fixedly connected to the control valve (7).

4. The anti-rust spraying equipment for steel structural components according to claim 3, characterized in that: The spraying structure (10) includes a first fixing sleeve (11), a first mounting rod (12), a fixing clamp (13), a connecting clamp (14), and a nozzle (15). The two first fixing sleeves (11) are fixedly installed on the outside of the support frame (6). The first mounting rod (12) is welded to the middle of the two first fixing sleeves (11). The fixing clamp (13) is fixedly installed on the outside of the first mounting rod (12). The connecting clamp (14) is fixedly installed at the lower end of the fixing clamp (13). The nozzle (15) is fixedly installed on one side of the connecting clamp (14).

5. The anti-rust spraying equipment for steel structural components according to claim 3, characterized in that: The inlet pipe (9) is fixedly connected to the nozzle (15), and the nozzle (15) is located above the processing placement frame (19).

6. A spraying process for a rust-proof spraying equipment for steel structural components as described in any one of claims 1-5, characterized in that, The process specifically includes the following steps: Step 1: Pre-treatment and fixing of workpieces. The steel structure parts to be sprayed are surface treated to ensure that they are free of oil and rust and reach a cleanliness level of Sa2.

5. The treated workpieces are fixed on the processing rack (19). The rust inhibitor in the material box (1) is a two-component epoxy zinc-rich primer. Its raw materials include, by mass percentage: 30-40% epoxy resin, 50-60% zinc powder, 2-4% thixotropic agent, 1-2% anti-settling agent and the remainder mixed solvent. Before spraying, the epoxy resin and solvent of component A are mixed with the curing agent of component B in a ratio of 4:1 and placed in the material box (1) and stirred evenly. Step 2: Equipment self-check and parameter preset, start the equipment, perform pipeline circulation and preheating, the control system sets the target dry film thickness to 80-120μm according to the workpiece type and target dry film thickness, and automatically calculates and sets the reference flow rate, pressure and estimated number of spraying passes of the spraying pump (3); Step 3: Adaptive spraying trajectory planning and execution. The control system drives the nozzle (15) to move and spray according to the planned path. During this process, a real-time distance sensor is integrated to dynamically detect the distance between the nozzle (15) and the workpiece surface and feed it back to the control system. The control system dynamically fine-tunes the spraying parameters according to the real-time distance to ensure the uniformity of spraying. Step 4: Multi-angle collaborative spraying. After completing the spraying of one angle, rotate the workpiece to the next angle and adjust the spraying position to ensure that the nozzle (15) is always perpendicular to the surface to be sprayed. Then carry out the next spraying. This process is repeated 2-4 times to ensure that all surfaces are covered and the coating is uniform. Step 5: Closed-loop quality control and curing. After spraying, the workpiece is measured online using a coating thickness gauge integrated into the equipment. The control system requires that the dry film thickness at all measurement points must reach more than 80μm, and the thickness of key corners and weld anti-corrosion areas must reach 100-120μm. Areas that do not meet the standards are targeted for re-spraying. After passing the quality inspection, the workpiece is moved to the curing area and cured at 25°C for 24 hours, or forced to cure at 60°C for 2 hours to achieve complete film formation. Step 6: Post-treatment and cleaning. Switch the control valve (7) to the cleaning circuit and use a special cleaning solvent to automatically clean the pipeline and nozzle (15) for the next use.

7. The spraying process of the anti-rust spraying equipment for steel structural components according to claim 6, characterized in that: In step three, the real-time distance sensing and pressure / flow fine-tuning constitute a closed-loop control. The control logic is as follows: when the sensor detects an increase in distance, the pressure of the spray pump (3) and the opening of the control valve (7) are increased according to a preset ratio; when the distance decreases, the pressure is reduced accordingly to maintain a constant spraying impact force and coverage density.

8. The spraying process of the anti-rust spraying equipment for steel structural components according to claim 4, characterized in that: In step four, the nozzle (15) is connected to the fixed sleeve (13) through the connecting clamp (14). The connecting clamp (14) is a quick-disassembly universal joint structure, which allows the spray flow path to be sealed and the electrical and signal lines to be quickly connected when changing nozzles (15) of different specifications.

9. The spraying process of the anti-rust spraying equipment for steel structural components according to claim 6, characterized in that: The coating thickness detection data in step five, the spraying path planning data in step three, and the angle rotation data in step four are fused in the control system to form a three-dimensional digital coating model of the workpiece. This model can be used for process optimization, quality traceability, and to provide a predictive benchmark for adaptive spraying parameters for subsequent workpieces in the same batch.

10. The spraying process of a steel structure anti-rust spraying equipment according to claim 6, characterized in that: The material box (6) is equipped with a liquid level and temperature sensor and a stirring device. In step two, the system will read the temperature of the rust inhibitor and control it to be maintained in the optimal spraying temperature range of 20-30℃. The raw material formula of the rust inhibitor can be adapted to the working environment: for C5 high corrosion environment, the zinc powder mass percentage is set at the upper limit of 60%, and an additional 1-2% phosphate passivator is added to ensure that the coating has higher cathodic protection performance and barrier effect. The stirring device is started regularly before spraying and during the spraying interval to ensure that the material is uniform.

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