Photovoltaic steel frame corrosion-resistant detection device based on multi-concentration salt spray working condition simulation

Abstract

The present application relates to the technical field of photovoltaic steel frame corrosion resistance detection, and particularly relates to a photovoltaic steel frame corrosion resistance detection device based on multi-concentration salt spray working condition simulation, which comprises a salt spray box, a plurality of detection cavities for different concentration working condition simulation tests arranged in the salt spray box, a rotary material placing assembly arranged in the detection cavities, a salt spray assembly for salt spray top spraying and side spraying in combination with the rotary material placing assembly, and a high-definition macro industrial camera and a fill light lamp fixedly installed on the inner wall and top of the detection cavities respectively; the multi-cavity independent partitioning is adopted to synchronously carry out different concentration salt spray simulation tests, the efficiency and working condition independence are considered, the Venturi tube and saturated wet air are cooperated to realize atomization, the salt spray is sprayed in the form of air curtain through the duckbill nozzle, the rotary material placing assembly and nozzle posture switching are combined to realize full-surface non-dead-angle spraying of the frame, and meanwhile, the salt spray concentration sensor linkage flow control valve realizes dynamic regulation and control, so that the detection precision and operation convenience are improved.

Description

Technical Field

[0001] This invention relates to the field of corrosion resistance testing technology for photovoltaic steel frames, and more particularly to a corrosion resistance testing device for photovoltaic steel frames based on multi-concentration salt spray simulation. Background Technology

[0002] Photovoltaic steel frames are frame-shaped structural components made of cold-rolled steel or galvanized steel through stamping, bending, welding, and anti-corrosion coating. They are mainly used for the encapsulation, fixing, and structural support of photovoltaic modules, providing structural rigidity, installation adaptability, and edge protection for the modules. They are key components that ensure the overall structural stability and long-term reliable operation of photovoltaic modules.

[0003] Because they are used in harsh outdoor environments such as coastal areas and industrial pollution zones for a long time, they are prone to problems such as rust, coating peeling, and substrate corrosion under salt spray erosion, which can lead to component sealing failure, electrical performance degradation, and even overall structural failure. Therefore, it is necessary to simulate real corrosion conditions through salt spray testing to accurately evaluate their corrosion resistance and durability, verify whether the product meets the relevant standard requirements, and provide a reliable basis for material selection, process optimization, and quality control.

[0004] Currently, traditional photovoltaic steel frame corrosion resistance testing equipment can only perform single-environment tests with fixed concentration salt spray, making it difficult to simultaneously simulate the real service conditions of multiple concentration gradients in coastal areas. Furthermore, the fixed salt spraying method easily creates blind spots in the top, sides, corners, and splicing seams of the frame, resulting in a large deviation between the corrosion simulation and the actual working conditions. In addition, the testing process relies heavily on manual visual observation to determine the degree of corrosion, which not only has low automation and intelligence but is also cumbersome and time-consuming, making it difficult to comprehensively, objectively, and truthfully reflect the true corrosion resistance and long-term reliability of photovoltaic steel frames in complex salt spray environments.

[0005] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation, in order to solve the aforementioned technical defects.

[0007] The objective of this invention can be achieved through the following technical solution: a photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation, including a salt spray chamber and multiple testing chambers located inside the salt spray chamber for different concentration condition simulation tests. The testing chambers are equipped with a rotary material placement component for placing the photovoltaic steel frame, and a salt spray component combined with the rotary material placement component for top and side spraying of salt spray.

[0008] The rotary feeding assembly includes a liquid collection tray and a feeding mesh plate fixedly installed inside the liquid collection tray.

[0009] The salt spray assembly includes a venturi tube for salt atomization, a duckbill nozzle for spraying the salt spray curtain, and a high-definition macro industrial camera and a supplementary light fixedly installed on the inner wall and top of the detection chamber, respectively.

[0010] Preferably, a partition plate is fixedly connected inside the detection chamber, and a drain pipe that is rotatably connected to the bottom of the liquid collection tray is fixedly connected to the partition plate, with the free end of the drain pipe extending through to the outside of the detection chamber.

[0011] Preferably, a rotating rod that extends through multiple detection chambers is rotatably connected to the salt spray chamber, multiple worm gears are fixedly connected to the rotating rod, a worm wheel that meshes with the corresponding worm gear is fixedly connected to the drain pipe, and a motor that drives the rotating rod to rotate is bolted to the salt spray chamber.

[0012] Preferably, a mounting column is slidably connected to the partition plate, and an inclined U-shaped frame is fixedly connected to the top of the mounting column. A deflection seat that abuts against the inner wall of the U-shaped frame is rotatably connected to the U-shaped frame, and the deflection seat is fixedly connected to the duckbill nozzle.

[0013] Preferably, the top of the salt spray chamber is equipped with a number of solution cylinders equal to the number of detection chambers, and a liquid extraction tube is fixedly connected between the solution cylinders and the throat of the Venturi tube. A connecting hose is fixedly connected between the diffuser end of the Venturi tube and the duckbill nozzle. The constriction end of the Venturi tube is connected to a saturated humid air generating unit through an air blowing tube. A flow control valve is installed on the liquid extraction tube, and a salt spray concentration sensor is installed inside the detection chamber.

[0014] Preferably, a spring is fixedly installed between the bottom of the mounting column and the bottom of the detection chamber, a rotating wheel is fixedly connected to the drain pipe, and a guide groove is fixedly connected to the annular outer wall of the rotating wheel. A guide rod that is slidably connected to the guide groove is fixedly connected to the mounting column.

[0015] Preferably, the guide groove includes an upper ring groove and a lower ring groove, and multiple inclined grooves are equally spaced between the upper ring groove and the lower ring groove, and the guide rod is located in the middle of the inclined groove in the natural state of the spring.

[0016] Preferably, each of the detection cavities is provided with an L-shaped limiting plate that is slidably connected to the salt spray chamber, and an L-shaped limiting groove is provided on the L-shaped limiting plate. A limiting rod that is slidably connected to the L-shaped limiting groove is fixedly connected to the deflection seat.

[0017] Preferably, the top of the salt spray chamber is provided with an adjustment plate that is fixedly connected to multiple L-shaped limiting plates, and a screw that is threadedly connected to the adjustment plate is rotatably connected to the salt spray chamber, and a torsion wheel is fixedly connected to the top of the screw.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) This invention uses a multi-cavity independent partition design to conduct simulation tests of different concentration salt spray conditions at the same time. Each detection cavity does not interfere with each other, which improves detection efficiency while ensuring the independence and accuracy of simulation of different concentration conditions. Through the coordinated cooperation of the Venturi tube and the saturated humid air generation unit, the salt solution and saturated humid air are fully mixed and atomized at high speed in the Venturi tube to form a salt spray curtain with uniform particle size and stable concentration. With the flat mouth treatment of the duckbill nozzle, the salt spray is stably sprayed out in the form of a curtain. At the same time, the rotary feeding component drives the photovoltaic steel frame to rotate continuously and slowly under the drive of the motor. Combined with the automatic switching between the top spray posture and the side spray posture of the duckbill nozzle, it can not only spray the top surface of the frame, but also accurately cover the sides and corner gaps and other parts that are prone to corrosion blind spots, avoiding problems such as insufficient local corrosion simulation and uneven spraying. It greatly improves the authenticity and comprehensiveness of corrosion detection under multi-concentration salt spray conditions, and ensures that the test results can truly reflect the corrosion resistance of the photovoltaic steel frame in different actual service salt spray environments.

[0020] (2) The present invention also collects salt spray concentration data in each detection chamber in real time through a salt spray concentration sensor, compares it with the preset concentration value, and automatically links the flow control valve to adjust the salt flow rate, forming a dynamic self-regulation of concentration, ensuring that the salt spray concentration is stable within the preset range, improving the accuracy of concentration control. At the same time, the supplementary light continuously provides stable illumination, and the high-definition macro industrial camera, under the control of the controller, automatically takes pictures at fixed intervals in combination with the rotation of the photovoltaic steel frame, accurately capturing the surface image of the sample. Through image recognition technology, it quantitatively analyzes corrosion defects such as rust spots, blistering, coating peeling, and pitting, replacing manual visual judgment, improving the adaptability and ease of operation of photovoltaic steel frame detection of different specifications. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings;

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the installation of the rotary feeding assembly and salt spray assembly of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the rotary feeding assembly of the present invention;

[0025] Figure 4 This is a schematic diagram of the cooperation between the rotary feeding assembly and the salt spray assembly of the present invention;

[0026] Figure 5 This is a schematic diagram showing the disassembly of the deflection seat and the L-shaped limiting plate of the present invention.

[0027] Legend:

[0028] 1. Salt spray chamber; 11. Detection chamber; 12. Divider plate; 13. Rotating rod; 14. Worm gear; 15. Adjusting plate; 16. Screw;

[0029] 2. Collection tray; 21. Feeding mesh plate; 22. Drain pipe; 23. Worm gear; 24. Rotating wheel; 25. Upper annular groove; 26. Lower annular groove; 27. Inclined groove;

[0030] 3. Venturi tube; 31. Duckbill nozzle; 32. Mounting post; 33. U-shaped bracket; 34. Deflector seat; 35. Solution cylinder; 36. Liquid extraction tube; 37. Connecting hose; 38. Saturated humid air generating unit; 39. Spring; 310. Guide rod; 311. L-shaped limiting plate; 312. L-shaped limiting groove; 313. Limiting rod. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figures 1-4 As shown, the following solutions can be used to address the problems of low automation and intelligence, cumbersome operation, and time-consuming operation, which are caused by the inability to simultaneously simulate the real service conditions of multiple concentration gradients in coastal areas and the reliance on manual visual observation to determine the degree of corrosion.

[0033] The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation in this embodiment includes a salt spray chamber 1 and multiple testing chambers 11 located inside the salt spray chamber 1 for simulating different concentration conditions. By independently partitioning the multiple chambers, simulation tests of different concentration salt spray conditions can be carried out simultaneously. Each testing chamber 11 does not interfere with the others, which improves the testing efficiency while ensuring the independence and accuracy of different concentration condition simulations.

[0034] The detection chamber 11 is equipped with a rotary material placement assembly for placing the photovoltaic steel frame, and a salt spray assembly combined with the rotary material placement assembly for top and side spraying of salt spray. The rotary material placement assembly includes a liquid collection tray 2 and a material placement mesh plate 21 fixedly installed inside the liquid collection tray 2. The material placement mesh plate 21 is used to support the photovoltaic steel frame while separating and discharging the liquefied salt spray, so as to avoid the accumulation of salt liquid at the bottom edge of the photovoltaic steel frame, which would lead to increased corrosion in the subsequent local area and affect the image presentation effect after image acquisition, thus causing the detection result deviation.

[0035] The salt spray assembly includes a venturi tube 3 for salt atomization and a duckbill nozzle 31 for spraying the salt spray curtain, which is used to spray the salt spray in a curtain-like manner to increase the coverage area of ​​the photovoltaic steel frame during rotation. A high-definition macro industrial camera and a supplementary light are fixedly installed on the inner wall and top of the detection chamber 11, respectively. The supplementary light is powered on to illuminate the photovoltaic steel frame. The controller controls the high-definition macro industrial camera to automatically take pictures at regular intervals in conjunction with the rotation of the photovoltaic steel frame, to collect images of the sample surface, and transmit the collected images to the controller to identify corrosion defects such as rust spots, blistering, coating peeling, and pitting on the photovoltaic steel frame under different concentrations of salt spray.

[0036] A partition plate 12 is fixedly connected inside the detection chamber 11 to separate the transmission components from the detection area, so as to facilitate the recycling and reuse of brine and avoid reducing the service life of the transmission components. The bottom of the collection tray 2 is fixedly connected to a drain pipe 22 that is rotatably connected to the partition plate 12, and the free end of the drain pipe 22 extends through to the outside of the detection chamber 11. The collection tray 2 collects excess brine and guides it out for recycling and reuse.

[0037] A rotating rod 13, which extends through multiple detection chambers 11, is rotatably connected to the salt spray chamber 1. Multiple worm gears 14 are fixedly connected to the rotating rod 13. A worm wheel 23, which meshes with the corresponding worm gear 14, is fixedly connected to the drain pipe 22. A motor that drives the rotating rod 13 to rotate is bolted to the salt spray chamber 1. The motor drives the rotating rod 13 to rotate, carrying the multiple worm gears 14. The worm gears 14, in conjunction with the corresponding worm wheels 23, drive the multiple collection trays 2 to rotate synchronously and slowly in the forward direction.

[0038] A mounting column 32 is slidably connected to the partition plate 12, and an inclined U-shaped frame 33 is fixedly connected to the top of the mounting column 32. A deflection seat 34 that abuts against the inner wall of the U-shaped frame 33 is rotatably connected to the U-shaped frame 33. The deflection seat 34 is fixedly connected to the duckbill nozzle 31. The salt spray is atomized and sprayed downwards through the duckbill nozzle 31, so that the salt spray is effectively sprayed to the top of the photovoltaic steel frame and the problem of salt spray not being able to reach the gaps in some areas is eliminated.

[0039] The top of the salt spray chamber 1 is equipped with a solution cylinder 35 of the same number as the detection chamber 11, and the solution cylinder 35 is fixedly connected to the throat of the venturi tube 3 by a liquid extraction pipe 36. The diffuser end of the venturi tube 3 is fixedly connected to the duckbill nozzle 31 by a connecting hose 37. The constriction end of the venturi tube 3 is connected to a saturated humid air generating unit 38 through an air blowing pipe.

[0040] The saturated humid air generating unit 38 injects saturated humid air into the Venturi tube 3 through the air blowing pipe. During the process of the saturated humid air entering the connecting hose 37 in the Venturi tube 3, a low-pressure area is formed at the throat of the Venturi tube 3. The salt solution is drawn from the inside of the solution cylinder 35 through the liquid extraction pipe 36. The salt solution and the saturated humid air are mixed at high speed in the Venturi tube 3 to form a gas-liquid two-phase flow salt mist, which is then atomized and sprayed out through the duckbill nozzle 31 on the connecting hose 37.

[0041] Saturated humid air can significantly reduce the rate of water evaporation of salt spray particles during atomization and delivery, prevent sodium chloride from crystallizing prematurely, avoid problems such as clogging of the 31 holes of the duckbill nozzle, atomization interruption, and concentration drift, and ensure continuous and stable output of salt spray at multiple concentrations. In addition, saturated humid air has a stable density and uniform moisture content, and forms a stable gas-liquid two-phase flow with the salt solution in the Venturi mixing chamber, which makes shear atomization more complete, stabilizes the salt spray particle size, and avoids large droplets from dripping directly or local salt spray accumulation.

[0042] A flow control valve is installed on the extraction tube 36, and a salt spray concentration sensor is installed inside the detection chamber 11. During the salt spraying process, the salt spray concentration sensor collects the concentration value in the detection chamber 11 and transmits the collected data to an external controller. The data is compared with the preset data. When the collected data is less than the preset data, a high concentration signal is generated to control the flow control valve to increase the salt solution flow rate. When the collected data is greater than the preset data, a low concentration signal is generated to control the flow control valve to decrease the salt solution flow rate. This forms a dynamic self-regulation of concentration, ensuring that the salt spray concentration is stable within the preset range and improving the accuracy of concentration control.

[0043] Example 2: Please refer to Figure 1 , Figures 3-5 As shown, the fixed salt spraying method can easily create blind spots in the top, sides, corners and seams of the frame, causing a large deviation between the corrosion simulation and the actual working conditions. The following solutions can be used to solve this problem.

[0044] In this embodiment, a spring 39 is fixedly installed between the bottom of the mounting column 32 and the bottom of the detection chamber 11. A rotating wheel 24 is fixedly connected to the drain pipe 22, and a guide groove is fixedly connected to the annular outer wall of the rotating wheel 24. A guide rod 310 that is slidably connected to the guide groove is fixedly connected to the mounting column 32. During the rotation of the drain pipe 22 carrying the liquid collection plate 2, the rotating wheel 24 is driven to rotate synchronously. The upward and downward movement of the mounting column 32 is adjusted by the guide groove and the guide rod 310.

[0045] The guide groove includes an upper ring groove 25 and a lower ring groove 26, and multiple inclined grooves 27 are equally spaced between the upper ring groove 25 and the lower ring groove 26. The guide rod 310 is located in the middle of the inclined groove 27 in the natural state of the spring 39. The liquid collection plate 2 rotates slowly and synchronously. The guide rod 310 rotates within the upper ring groove 25. After the controller controls the motor to drive the liquid collection plate 2 to rotate forward a preset number of positive turns, it controls the motor to drive the liquid collection plate 2 to rotate in the reverse direction.

[0046] After the inclined groove 27 rotates to below the guide rod 310, the tension of the spring 39 causes the guide rod 310 to carry the mounting column 32 to move downward. Then the spring 39 is compressed and the guide rod 310 is guided to rotate in the lower ring groove 26. The mounting column 32 carries the duckbill nozzle 31 to move downward, atomizing and spraying the side of the rotating photovoltaic steel frame.

[0047] Each detection chamber 11 is equipped with an L-shaped limiting plate 311 that is slidably connected to the salt spray chamber 1, and an L-shaped limiting groove 312 is provided on the L-shaped limiting plate 311. A limiting rod 313 that is slidably connected to the L-shaped limiting groove 312 is fixedly connected to the deflection seat 34. During the descent of the duckbill nozzle 31 carried by the mounting column 32, the limiting rod 313 slides in the vertical section of the L-shaped limiting groove 312 until it touches the horizontal section of the L-shaped limiting groove 312, thereby restricting the continuous descent of the limiting rod 313 and causing the deflection seat 34 to deflect at its rotation point on the U-shaped frame 33, thereby fixing the vertical spraying angle of the duckbill nozzle 31 and completing the full atomization spraying of the side of the photovoltaic steel frame.

[0048] The top of the salt spray chamber 1 is provided with an adjustment plate 15 that is fixedly connected to multiple L-shaped limiting plates 311. A screw 16 that is threadedly connected to the adjustment plate 15 is rotatably connected to the salt spray chamber 1, and a torsion wheel is fixedly connected to the top of the screw 16. Rotating the torsion wheel drives the screw 16 to rotate, and the screw 16 drives the adjustment plate 15 to carry multiple L-shaped limiting plates 311 to move up or down, thereby adjusting the vertical spraying angle of the duckbill nozzle 31 after it descends, so as to achieve comprehensive spraying treatment on the sides of the photovoltaic steel frame at different heights.

[0049] Example 3: Please refer to Figures 1-5 As shown, this invention also proposes a method for using a photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation, including the following steps:

[0050] Step 1: Place salt solutions of different concentrations in multiple solution cylinders 35. Place the photovoltaic steel frame on top of the material feeding mesh plate 21 in the liquid collection tray 2. The motor drives the rotating rod 13 to carry multiple worm gears 14 to rotate. The worm gears 14, combined with the corresponding worm wheels 23, drive multiple liquid collection trays 2 to rotate synchronously and slowly in the forward direction. The guide rod 310 rotates in the upper ring groove 25, causing the photovoltaic steel frame to rotate.

[0051] Step 2: The saturated humid air generating unit 38 injects saturated humid air into the Venturi tube 3 through the air blowing pipe. During the process of the saturated humid air entering the connecting hose 37 in the Venturi tube 3, a low-pressure zone is formed at the throat of the Venturi tube 3. Salt solution is drawn from inside the solution cylinder 35 through the liquid extraction pipe 36. The salt solution and saturated humid air are mixed at high speed in the Venturi tube 3 to form a gas-liquid two-phase flow salt mist. Then, it is atomized and sprayed downwards through the duckbill nozzle 31 on the connecting hose 37, so that the salt mist is sprayed onto the top of the photovoltaic steel frame. During the salt mist spraying process, the concentration value in the detection chamber 11 is collected by the salt mist concentration sensor and the collected data is transmitted to the external controller. The data is compared with the preset data. When the collected data is less than the preset data, a high concentration signal is generated to control the flow control valve to increase the salt solution flow rate. When the collected data is greater than the preset data, a low concentration signal is generated to control the flow control valve to decrease the salt solution flow rate.

[0052] Step 3: After the controller controls the motor to drive the liquid collection tray 2 to rotate forward a preset number of times, it controls the motor to drive the liquid collection tray 2 to rotate in the reverse direction. After the inclined groove 27 rotates to below the guide rod 310, the tension of the spring 39 causes the guide rod 310 to carry the mounting column 32 to move downward. Then, the spring 39 is compressed and the guide rod 310 is guided to rotate in the lower ring groove 26. The mounting column 32 carries the duckbill nozzle 31 to move downward. During the downward movement, the limiting rod 313 slides in the vertical section of the L-shaped limiting groove 312 until it touches the horizontal section of the L-shaped limiting groove 312, thereby limiting the continuous downward movement of the limiting rod 313, thus fixing the vertical spraying angle of the duckbill nozzle 31, and thus performing comprehensive atomized spraying on the side of the rotating photovoltaic steel frame.

[0053] Step 4: Rotating the torsion wheel drives the screw 16 to rotate. The screw 16 drives the adjusting plate 15 to carry multiple L-shaped limit plates 311 to rise or fall, thereby adjusting the vertical spraying angle of the duckbill nozzle 31 after it descends, achieving comprehensive spraying treatment on the sides of the photovoltaic steel frame at different heights. The supplementary light is powered on to illuminate the photovoltaic steel frame. The controller controls the high-definition macro industrial camera, which automatically takes pictures at regular intervals in conjunction with the rotation of the photovoltaic steel frame, acquiring images of the sample surface and transmitting the acquired images to the controller to identify corrosion defects such as rust spots, blistering, coating peeling, and pitting on the photovoltaic steel frame under different concentrations of salt spray.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray simulation, comprising a salt spray chamber (1) and multiple testing chambers (11) located inside the salt spray chamber (1) for simulating different concentration conditions, characterized in that, The detection chamber (11) is equipped with a rotary material placement assembly for placing the photovoltaic steel frame, and a salt spray assembly combined with the rotary material placement assembly for top and side spraying of salt spray. The rotary feeding assembly includes a liquid collection tray (2) and a feeding mesh plate (21) fixedly installed inside the liquid collection tray (2). The salt spray assembly includes a venturi tube (3) for salt atomization, a duckbill nozzle (31) for the salt spray curtain, and a high-definition macro industrial camera and a fill light are fixedly installed on the inner wall and top of the detection chamber (11), respectively.

2. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 1, characterized in that, The detection chamber (11) is fixedly connected to a partition plate (12), and the bottom of the liquid collection tray (2) is fixedly connected to a drain pipe (22) that is rotatably connected to the partition plate (12), and the free end of the drain pipe (22) extends through to the outside of the detection chamber (11).

3. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 2, characterized in that, The salt spray chamber (1) is rotatably connected to a rotating rod (13) that extends through multiple detection chambers (11). Multiple worm gears (14) are fixedly connected to the rotating rod (13). A worm wheel (23) that meshes with the corresponding worm gear (14) is fixedly connected to the drain pipe (22). A motor that drives the rotating rod (13) to rotate is installed on the salt spray chamber (1) by bolts.

4. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 2, characterized in that, The partition plate (12) is slidably connected to a mounting column (32), and the top of the mounting column (32) is fixedly connected to an inclined U-shaped frame (33). The U-shaped frame (33) is rotatably connected to a deflection seat (34) that abuts against its inner wall. The deflection seat (34) is fixedly connected to the duckbill nozzle (31).

5. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 1, characterized in that, The top of the salt spray chamber (1) is equipped with a number of solution cylinders (35) equal to the number of detection chambers (11), and a liquid extraction tube (36) is fixedly connected between the solution cylinders (35) and the throat of the venturi tube (3). A connecting hose (37) is fixedly connected between the diffuser end of the venturi tube (3) and the duckbill nozzle (31). The constriction end of the venturi tube (3) is connected to a saturated humid air generating unit (38) through an air blowing tube. A flow control valve is installed on the liquid extraction tube (36), and a salt spray concentration sensor is installed inside the detection chamber (11).

6. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 4, characterized in that, A spring (39) is fixedly installed between the bottom of the mounting column (32) and the bottom of the detection chamber (11). A rotating wheel (24) is fixedly connected to the drain pipe (22), and a guide groove is fixedly connected to the annular outer wall of the rotating wheel (24). A guide rod (310) that is slidably connected to the guide groove is fixedly connected to the mounting column (32).

7. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 6, characterized in that, The guide groove includes an upper ring groove (25) and a lower ring groove (26), and multiple inclined grooves (27) are equally spaced between the upper ring groove (25) and the lower ring groove (26). The guide rod (310) is located in the middle of the inclined groove (27) in the natural state of the spring (39).

8. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 4, characterized in that, Each of the detection chambers (11) is provided with an L-shaped limiting plate (311) that is slidably connected to the salt spray chamber (1), and an L-shaped limiting groove (312) is provided on the L-shaped limiting plate (311). A limiting rod (313) that is slidably connected to the L-shaped limiting groove (312) is fixedly connected to the deflection seat (34).

9. The photovoltaic steel frame corrosion resistance testing device based on multi-concentration salt spray condition simulation according to claim 8, characterized in that, The top of the salt spray chamber (1) is provided with an adjustment plate (15) which is fixedly connected to multiple L-shaped limiting plates (311). The salt spray chamber (1) is rotatably connected with a screw (16) which is threadedly connected to the adjustment plate (15), and a torsion wheel is fixedly connected to the top of the screw (16).

Images