Salt spray test device for simulating salt spray environment

Abstract

The invention discloses a salt spray test device for simulating a salt spray environment, and relates to the technical field of material analysis equipment. The device comprises a main box body, a box cover, an ultrasonic salt mist generating device, an axial flow fan, an airflow distributor, an airflow guide device, a salt mist metering device, a control device panel and the like, wherein the main box body is provided with an inner cavity and a top sealing water tank; an auxiliary box body is arranged on one side of the main box body, and the auxiliary box body is provided with an inner cavity and is communicated with the inner cavity of the main box body; the upper end of the auxiliary box body is provided with a sunken saline water tank for storing saline water; the bottom of the ultrasonic salt mist generating device is communicated with the salt water tank through a conduit. Through the innovative structure, many problems of a traditional test are solved, salt mist distribution is optimized, and uniformity is ensured; temperature and humidity are accurately controlled, and simulation is more real; an ultraviolet light source is introduced, the illumination period is precisely regulated and controlled, and the device fits the natural environment; the corrosion resistance of the material can be comprehensively and accurately evaluated, reliable test support is provided for research, development and application of the material, and product quality and reliability are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of material analysis equipment, and particularly relates to a salt spray test device for simulating a salt spray environment. BACKGROUND

[0002] For a long time, salt spray test, as an important method to simulate the corrosion of materials in a salt spray environment, has been widely used in the evaluation of material corrosion resistance. Traditional salt spray test chambers mainly consist of a test chamber, a salt spray generating device, a temperature control device, and other parts. The working principle is to atomize salt water into fine salt spray particles by the salt spray generating device and spray them onto the samples in the test chamber, while maintaining a certain temperature environment in the test chamber by the temperature control device to simulate different use scenarios.

[0003] Traditional salt spray test mainly focuses on the simulation of salt spray and temperature, ignoring the influence of other important environmental factors on material corrosion. In actual use environment, materials will not only be corroded by salt spray, but also be irradiated by ultraviolet rays (UV) in sunlight. Ultraviolet rays can induce photochemical reactions on the surface of materials, accelerating the corrosion process of materials. However, traditional salt spray test chambers cannot simulate the effect of ultraviolet rays, resulting in a certain deviation between test results and actual conditions, and cannot comprehensively and truly evaluate the corrosion resistance of materials in complex natural environment. Traditional salt spray test chambers have obvious shortcomings in salt spray distribution. Due to the spraying mode of the salt spray generating device and the natural gravity drop, the airflow organization in the chamber is unreasonable, resulting in uneven distribution of salt spray in the test chamber. The salt spray concentration in some areas is too high, while in other areas it is too low, which makes the corrosion degree of salt spray borne by samples at different positions differ greatly, and does not consider the corrosion effect of salt spray impacting materials with airflow, which cannot accurately reflect the real corrosion condition of materials in actual use environment.

[0004] In order to overcome the limitations of traditional salt spray test methods, some improved technologies have emerged. For example, some test chambers increase fans to improve the distribution of salt spray, but this way will cause the temperature in the test chamber to fluctuate greatly, making it difficult to accurately control the test temperature and affecting the stability of the test results. Some test chambers try to introduce ultraviolet light sources to simulate the UV component in sunlight, but due to the lack of reasonable light cycle control and uniform light distribution design, they cannot accurately simulate the influence of day and night alternation and light intensity change in natural environment on material corrosion, and still cannot meet the actual needs well.

[0005] In view of the many problems existing in traditional salt spray test methods and existing improved technologies, in order to more accurately and comprehensively simulate the corrosion of materials in actual use environment and improve the reliability and effectiveness of material corrosion resistance evaluation, it is necessary to design a new type of salt spray test device for simulating a salt spray environment. SUMMARY

[0006] The purpose of the present application is to provide a salt spray test device for simulating a salt spray environment, which ensures uniformity by optimizing salt spray distribution, accurately controls temperature and humidity to simulate more realistically, introduces an ultraviolet light source and accurately controls the light period, conforms to the natural environment, can comprehensively and accurately evaluate the corrosion resistance of materials, provides reliable test support for material research and application, and improves product quality and reliability.

[0007] To solve the above technical problems, the present application is realized by the following technical scheme: The present application is a salt spray test device for simulating a salt spray environment, which comprises a main box body provided with an inner cavity and a top sealed water tank, a box cover, an ultrasonic salt spray generating device, an axial flow fan, an air flow distributor, an air flow guiding device, a salt spray metering device, a control device panel, etc. A vice box body is arranged on one side of the main box body, and the vice box body is provided with an inner cavity and is in communication with the inner cavity of the main box body. A salt water tank for storing salt water is arranged on the upper end of the vice box body. The bottom of the ultrasonic salt spray generating device is communicated with the salt water tank through a conduit. A heating device is installed on the vice box body. The control device panel is installed on the vice box body. A partition wall is arranged between the front and rear inner walls of the main box body, and the partition wall is provided with an inner cavity and is in communication with the inner cavity of the main box body. The inner part of the main box body is divided into a test area on the left side and a drying area on the right side. A circulation channel is arranged between the lower end of the partition wall and the inner bottom surface of the main box body. The area below the partition wall is filled with filtered water during the test. The filtered water filters the salt spray, and the filtered water is a liquid such as deionized water which is not easy to evaporate and does not interfere with the test sample. The excess filtered water is discharged from the overflow discharge pipe, and the valve on the pipe is opened regularly during the test to drain water.

[0008] The test area inside includes temperature sensors, humidity sensors, sample racks, sample leaning rods and the salt spray metering device. The heating device, temperature sensors and humidity sensors are connected to the temperature control components and temperature control components in the control device panel through high-temperature-resistant and corrosion-resistant wires. The sample racks are three, which can be used to carry test samples individually, or can be used to support test samples in groups, or can be combined with the sample leaning rods to place test samples at a large angle.

[0009] The drying area inside includes the ultrasonic salt fog generating device, the axial flow fan and the air flow distributor; a separation closed plate is arranged between the separation wall and the right inner wall of the main box body; the separation closed plate is vertically penetrated and fixed with a backflow pipeline communicated with the axial flow fan; the axial flow fan is connected with the speed regulator assembly in the control device panel through high-temperature-resistant and corrosion-resistant wires, and the circulating air speed is adjusted by controlling the power of the axial flow fan; the ultrasonic salt fog generating device uses high-frequency oscillation generated by ultrasonic waves to scatter water into small water molecule particles with a diameter of only - microns, and chloride ions are dissolved in the small particles; the small particles are sprayed and delivered into the test area of the main box body to form a salt fog environment; the size of the salt fog can be adjusted by the power of the oscillator; the air flow guiding device is installed on the box cover; the main box body, the box cover, the salt water tank and other components are all made of heat-resistant and corrosion-resistant plastic plates and are assembled and welded.

[0010] As a preferred technical solution of the present application, the salt water tank is provided with a salt water tank cover plate, and a flip cover is arranged on the salt water tank cover plate; two ultraviolet light sources are fixed on the upper end of the separation wall near the two ends of the front and rear inner walls of the main box body for irradiating the test area.

[0011] As a preferred technical solution of the present application, the ultraviolet light source includes a glass tube with one end open and a UV lamp tube installed inside the glass tube; the glass tube is fixed on the separation wall and the open end of the glass tube is located in the drying area; a reflective layer is attached to the inner wall of the upper half of the glass tube to reduce the amount of UV lamp tube irradiation outside the test device. The high-temperature-resistant and corrosion-resistant wires of the UV lamp tube are respectively connected with the light switch control assembly in the control device panel to control the opening and closing of the UV lamp tube.

[0012] As a preferred technical solution of the present application, the box cover and the main box body are hinged through a hinge member; the overflow discharge pipe and the wastewater discharge pipe communicated with the test area / drying area of the main box body and provided with valve bodies are fixed through the rear wall of the main box body; the heat-conducting liquid filling pipe communicated with the inner cavity of the main box body is fixed through one side wall of the main box body; the salt water discharge pipe provided with a valve body is fixed through the rear wall of the salt water tank, and the salt water discharge pipe penetrates through the rear wall of the auxiliary box body.

[0013] As a preferred technical scheme of the present application, the box cover comprises a rectangular frame of the lower half; a pointed cover top is arranged at the upper end of the rectangular frame; a handle is arranged at the middle part of the front wall of the rectangular frame; two parallel arranged partition plates are fixed on the inner walls of the front and back walls of the rectangular frame and the inner wall of the pointed cover top, and when the box cover is arranged on the main box body, the two partition plates are located above the partition wall; a butt joint air guide pipe is fixedly penetrated through the upper half of the middle part of the two partition plates; a butt joint salt mist guide pipe is fixedly penetrated through the lower half of the middle part of the two partition plates; a row of shaft holes are arranged on the side walls of the two partition plates and the rectangular frame in the test area, and the row of shaft holes are located between the butt joint air guide pipe and the butt joint salt mist guide pipe.

[0014] As a preferred technical scheme of the present application, the air flow guide device comprises a swing motor, an air guide plate, a synchronous plate and a connecting rod; the swing motor is installed on the side wall of the partition plate on one side of the drying area through a motor support, and the output shaft of the swing motor is coaxially arranged with one of the shaft holes; the air guide plate comprises a shaft rod matched with the shaft hole and a pair of air guide blades fixed on the shaft rod in an axisymmetric manner, and a waist round plug is arranged at one end of the shaft rod and matched with the connecting rod and provided with a key groove; a row of the air guide plates are installed on one side of the test area of the box cover, and the waist round plug end of the air guide plate penetrates through the two partition plates; the swing motor is drivingly connected with the coaxially arranged air guide plate through a shaft coupling and a key pin, the swing motor is connected with a speed controller assembly in the control device panel through high-temperature-resistant and corrosion-resistant wires, respectively, for controlling the speed or angle of the reciprocating swing of the air guide plate; the connecting rod and the synchronous plate are arranged between the two partition plates; the waist round plug at one end of the connecting rod is sleeved and installed on the connecting rod and synchronously rotates, and a cylindrical head is arranged at the end of the connecting rod and penetrates through the synchronous plate and rotates relatively.

[0015] As a preferred technical scheme of the present application, the air flow distributor comprises a gas guide main pipe connected with the air outlet upper end of the axial flow fan, and the upper end of the gas guide main pipe is closed; a first gas guide branch pipe located on the upper side and a second gas guide branch pipe located on the lower side are arranged in communication on the gas guide main pipe; when the box cover is closed, the first gas guide branch pipe is butt jointed with the butt joint air guide pipe, and the second gas guide branch pipe is butt jointed with the butt joint salt mist guide pipe; a salt mist conveying connecting pipe connected with the upper end of the ultrasonic salt mist generating device is communicated with the lower half of the second gas guide branch pipe; a first air volume adjusting valve is arranged on the first gas guide branch pipe; a second air volume adjusting valve is arranged on the second gas guide branch pipe.

[0016] As a preferred technical scheme of the present application, a circular arc air deflector is fixed between the lower half of the left end of the docking air duct and the left inner wall of the rectangular frame body; three pairs of V-shaped supporting blocks for mounting the sample rack are installed on the left and right inner walls of the test area; two pairs of U-shaped supporting blocks for mounting the sample leaning rod are installed on the left and right inner walls of the test area; the U-shaped supporting blocks are located above the V-shaped supporting blocks, and the V-shaped supporting blocks and the U-shaped supporting blocks are staggered. The sample rack is V-shaped, and a row of uniformly arranged small holes are arranged at the tip of the sample rack to prevent saltwater accumulation; a row of uniformly arranged semicircular notches are arranged at the upper end of the two walls, reducing the contact part of the sample with the sample rack and accelerating the flow rate of the salt mist.

[0017] As a preferred technical scheme of the present application, a bottom supporting plate is further included; the bottom of the main box body and the bottom of the auxiliary box body are jointly installed on the bottom supporting plate.

[0018] As a preferred technical scheme of the present application, a heat preservation layer is jointly installed on the outer part of the main box body and the outer part of the auxiliary box body; the box cover is a transparent heat corrosion resistant plastic plate assembled and welded structure.

[0019] The present application has the following beneficial effects: By dividing the main box body into a test area and a drying area, installing an axial flow fan and an air flow distributor, and cooperating with the air flow guide device installed on the box cover, the present application effectively reduces the adhesion of salt mist on the top, even if a small amount of adhesion can also evaporate with the air flow, avoiding the condensation and falling of water droplets on the test sample, thereby ensuring the accuracy of the test results. The design of the air flow guide device can guide the air flow and the salt mist to flow along the predetermined path, improve the uniformity and flow rate of the salt mist in the test area, and simulate the salt mist corrosion under high speed air flow.

[0020] The present application forms a large constant temperature water area test environment in the box by the main box body, the auxiliary box body and the embedded saltwater tank, and combines the air flow to push the salt mist test in a relatively closed state to help realize the uniformity and stability of the temperature in the test box.

[0021] The present application simulates the accelerating effect of the UV component in sunlight on material corrosion by adding an ultraviolet light source, which is particularly important for evaluating the weather resistance of materials under long-term outdoor exposure, and makes the salt mist test more consistent with the natural state. By simulating the influence of day and night alternation on material corrosion, the test is further improved in terms of authenticity and reliability.

[0022] The present application designs the sample rack and the sample leaning rod, so that the test sample can be individually or in groups supported, and can also be placed at a large angle to simulate the material corrosion under different use scenarios.

[0023] The device of the present application not only meets the requirements of the existing national standards, but also improves the adaptability and expansibility of the test method by introducing the extension function of light, etc., and provides strong support for possible future standard updates or special test requirements.

[0024] Of course, implementing any product of the present application does not necessarily require achieving all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0026] Figure 1 A structural schematic diagram of a salt spray test device for simulating a salt spray environment according to the present application.

[0027] Figure 2 A front view of the present application.

[0028] Figure 3 A partial sectional view of the front view state of the present application.

[0029] Figure 4 A right view of the present application.

[0030] Figure 5 A sectional view in the right view direction of the present application.

[0031] Figure 6 A structural schematic diagram of the present application when the box cover is opened.

[0032] Figure 7 A structural schematic diagram of the box cover.

[0033] Figure 8 A structural schematic diagram of the air flow distributor.

[0034] Figure 9 A structural schematic diagram of the air deflector.

[0035] Figure 10 A structural schematic diagram of the synchronization plate.

[0036] Figure 11 A structural schematic diagram of the connecting rod.

[0037] Figure 12 A structural schematic diagram of the sample rack.

[0038] Figure 13 A structural schematic diagram of the ultraviolet light source.

[0039] Figure 14 Structure diagram of bottom supporting plate.

[0040] In the drawings, the components represented by each reference numeral are listed as follows: 1-main box, 2-box cover, 3-ultrasonic salt fog generating device, 4-control device panel, 5-axial flow fan, 6-air flow distributor, 7-air flow guiding device, 8-salt fog metering device, 9-salt water tank, 10-heating device, 11-temperature sensor, 12-humidity sensor, 13-sample rack, 14-sample leaning rod, 15-ultraviolet light source, 16-hinge member, 17-bottom supporting plate, 31-conduit, 91-salt water tank cover plate, 92-flap, 93-salt water discharge pipe, 101-sub box, 102-separation wall, 103-circulation channel, 104-separation closure plate, 105-backflow pipe, 106-overflow discharge pipe, 107-waste water discharge pipe, 108-heat-conducting liquid filling pipe, 151-glass tube, 152-UV lamp tube, 153-reflective coating, 21-rectangular frame, 22-sharp cone cover top, 23-handle, 24-separation plate, 25-butted air guide pipe, 26-butted salt fog guide pipe, 27-shaft hole, 28-oscillating motor, 71-oscillating motor, 72-air guide plate, 73-synchronous plate, 74-connecting rod, 61-air guide main pipe, 62-first air guide branch pipe, 63-second air guide branch pipe, 64-salt fog conveying connecting pipe, 65-first air volume adjusting valve, 66-second air volume adjusting valve. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. Embodiment one: Please refer to Figures 1-6 and Figure 13 , the present application is a salt fog test device for simulating salt fog environment, which is composed of a main box 1 provided with an inner cavity and a top sealing water tank, a box cover 2, an ultrasonic salt fog generating device 3, an axial flow fan 5, an air flow distributor 6, an air flow guiding device 7, a salt fog metering device 8, a control device panel 4, and an ultraviolet light source 15. The components work cooperatively to simulate a complex salt fog environment and test the corrosion resistance of materials. The components such as the main box 1, the box cover 2, and the salt water tank 9 are all made of heat-resistant and corrosion-resistant plastic plates and are assembled and welded.

[0043] The main box body 1 is provided with a sub-box body 101 on one side, and the sub-box body 101 is provided with an inner cavity and communicates with the inner cavity of the main box body 1. The sub-box body 101 is provided with a salt water tank 9 for storing salt water at the upper end, which is used for storing salt water. The salt water tank 9 is provided with a salt water tank cover plate 91, and the salt water tank cover plate 91 is provided with a flip cover 92. The bottom of the ultrasonic salt mist generating device 3 communicates with the salt water tank 9 through the conduit 31, and the salt water is converted into salt mist. The lead of the ultrasonic salt mist generating device 3 is connected with the related control components in the control device panel 4 through the main box body 1. The waste liquid in the ultrasonic salt mist generating device 3 is discharged through the waste liquid drain pipe at the bottom of the outer box wall at the rear end of the main box body 1, and the waste liquid drain pipe (not shown in the figure) is provided with a valve body. The sub-box body 101 is provided with a heating device 10 for adjusting the test environment temperature. Ensure that the temperature conditions (such as 35℃±2℃) meet the requirements of national standards GB2423.17-2024 and GB / T 10125-2012. The rear end of the main box body 1 is provided with two salt mist metering devices 8, which are composed of a measuring cylinder and a conduit and communicate with the salt mist collector in the main box body 1. The control device panel 4 is installed on the sub-box body 101, which is composed of a temperature control component, a humidity control component, an ultrasonic oscillator power adjustment component, a periodic intermittent timer component and the like, and realizes accurate control of the test environment.

[0044] The main box body 1 is provided with a partition wall 102 between the front and rear inner walls, and the partition wall 102 is provided with an inner cavity and communicates with the inner cavity of the main box body 1. The inner part of the main box body 1 is divided into a test area on the left and a drying area on the right. The lower end of the partition wall 102 and the inner bottom surface of the main box body 1 are provided with a circulation channel 103. The area below the partition wall 102 is filled with filtered water during the test, and the filtered water filters the salt mist. The filtered water is deionized water or other liquids that are not easy to evaporate and do not interfere with the test sample.

[0045] The box cover 2 is hinged to the main box body 1 through the hinge member 16. The rear wall of the main box body 1 is fixedly provided with an overflow drain pipe 106 and a waste water drain pipe 107 which communicate with the test area / drying area of the main box body 1 and are provided with valve bodies. The side wall of the main box body 1 is fixedly provided with a heat-conducting liquid filling pipe 108 which communicates with the inner cavity thereof. The rear wall of the salt water tank 9 is fixedly provided with a salt water drain pipe 93 which is provided with a valve body, and the salt water drain pipe 93 penetrates through the rear wall of the sub-box body 101. The excess filtered water added will be discharged from the overflow drain pipe 106, and the valve thereon is opened at regular intervals during the test to perform the drainage operation.

[0046] The test area includes a temperature sensor 11, a humidity sensor 12, a sample stand 13, a sample support rod 14, and a salt spray metering device 8. The heating device 10, temperature sensor 11, and humidity sensor 12 are connected to the temperature control components on the control panel 4 via high-temperature and corrosion-resistant wires. There are three sample stands 13. Each sample stand 13 can be used individually to support a sample, or in groups to support samples. The sample stands 13 can also be combined with the sample support rod 14 to place samples at large angles to simulate different usage scenarios.

[0047] The drying zone includes an ultrasonic salt spray generator 3, an axial flow fan 5, and an airflow distributor 6. A partition wall 104 is installed between the partition wall 102 and the inner right wall of the main chamber 1. A return pipe 105, connected to the axial flow fan 5, is vertically fixed through the partition wall 104. The axial flow fan 5 is connected to the speed regulator assembly in the control panel 4 via high-temperature and corrosion-resistant wires, and the circulating air speed is adjusted by controlling the power of the axial flow fan 5. The ultrasonic salt spray generator 3 uses high-frequency oscillations generated by ultrasound to break water into tiny water molecule particles with a diameter of only 1-5 micrometers. Chloride ions dissolve in these small particles, which are then sprayed and transported into the test area of ​​the main chamber 1 to form a salt spray environment. The amount of salt spray can be adjusted by the power of the oscillator.

[0048] Among them, such as Figure 5 and Figure 12 As shown, an ultraviolet (UV) light source 15 is fixedly installed at both ends of the upper part of the partition wall 102, near the front and rear inner walls of the main housing 1, to irradiate the test area. The UV light source 15 includes a glass tube 151 with one open end and a UV lamp 152 installed inside the glass tube 151. The glass tube 151 is fixedly installed on the partition wall 102, with the open end of the glass tube 151 located in the drying area. A reflective layer 153 is attached to the inner wall of the upper half of the glass tube 151 to reduce the amount of UV lamp 152 irradiating outside the test device. The high-temperature and corrosion-resistant wires of the UV lamp 152 are connected to the light switch control component in the control panel 4, thereby controlling the UV lamp 152 to turn on and off, simulating the effect of day and night alternation on material corrosion. The UV light source 15 simulates the accelerating effect of the UV component in sunlight on material corrosion.

[0049] Among them, such as Figure 7As shown, the cover 2 includes a rectangular frame 21 in its lower half. A conical dome 22 is provided at the upper end of the rectangular frame 21. A handle 23 is provided in the middle of the front wall of the rectangular frame 21. Two parallel partition plates 24 are fixed together on the inner walls of the front and rear of the rectangular frame 21 and the inner wall of the conical dome 22. When the cover 2 is placed on the main body 1, both partition plates 24 are located directly above the partition wall 102. A connecting air duct 25 is fixed through the upper half of the middle of the two partition plates 24. A connecting salt spray duct 26 is fixed through the lower half of the middle of the two partition plates 24. A row of shaft holes 27 is opened together on the side wall of the two partition plates 24 and the rectangular frame 21 in the test area, and the row of shaft holes 27 is located between the connecting air duct 25 and the connecting salt spray duct 26.

[0050] An airflow guiding device 7 is installed on the box cover 2. For example... Figure 3 , 7 The airflow guiding device 7 shown in Figures 9-11 includes a swing motor 71, a guide plate 72, a synchronization plate 73, and a connecting rod 74. A swing motor 28 is mounted on the side wall of the partition plate 24 located on one side of the drying zone via a motor bracket, and the output shaft of the swing motor 28 is coaxially arranged with one of the shaft holes 27. The guide plate 72 includes a shaft that mates with the shaft hole 27 and a pair of guide vanes symmetrically fixed on the shaft. One end of the shaft has an oval plug that mates with the connecting rod 74 and has a keyway. A row of guide plates 72 is installed on the test zone side of the cover 2, and the oval plug ends of the guide plates 72 pass through two partition plates 24. The swing motor 28 is connected to the coaxially arranged guide plates 72 via a coupling and a key pin. The swing motor 28 is connected to the speed controller assembly in the control device panel 4 via high-temperature and corrosion-resistant wires to control the reciprocating swing rate of the guide plates 72 or to a fixed angle. The connecting rod 74 and the synchronization plate 73 are positioned between the two partition plates 24. One end of the connecting rod 74 is fitted onto the oval plug of the connecting rod 74 and rotates synchronously. The cylindrical head of the connecting rod 74 passes through the synchronous plate 73 and rotates relative to it. The swing motor 71 is connected to the air guide plate 72 through a coupling and key pin, controlling a row of air guide plates 72 to swing synchronously back and forth, guiding the airflow and salt spray to flow along a predetermined path, improving the uniformity and flow rate of the salt spray, and avoiding direct blowing onto the sample, which would affect the test results.

[0051] Among them, such as Figure 3 , 8As shown, the airflow distributor 6 includes a main air duct 61 connected to the upper end of the axial flow fan 5, and the upper end of the main air duct 61 is closed. A first air duct branch 62 located on the upper side and a second air duct branch 63 located on the lower side are connected to the main air duct 61. When the cover 2 is closed, the first air duct branch 62 is connected to the air duct 25, and the second air duct branch 63 is connected to the salt spray duct 26. The lower half of the second air duct branch 63 is connected to a salt spray delivery pipe 64 connected to the upper end of the ultrasonic salt spray generator 3. A first airflow regulating valve 65 is installed on the first air duct branch 62. A second airflow regulating valve 66 is installed on the second air duct branch 63. The first air duct branch 62 and the second air duct branch 63 are respectively used to distribute the downward airflow through the airflow guide device 7 and the flow rate of salt spray output from the ultrasonic salt spray generator 3 to the test area of ​​the main chamber 1, and the airflow is precisely controlled by the first airflow regulating valve 65 and the second airflow regulating valve 66. The airflow guiding device 7 installed on the lid 2, together with the airflow distributor 6, prevents condensation on the top of the lid 2, prevents water droplets from condensing and falling onto the sample, and ensures the accuracy of the test results.

[0052] An arc-shaped air guide plate 28 is fixed between the lower half of the left end of the connecting air duct 25 and the inner left wall of the rectangular frame 21, dispersing the airflow upwards first and then downwards to improve airflow uniformity. Three pairs of V-shaped support blocks for mounting the sample stage 13 are installed on the inner left and right walls of the test area. Two pairs of U-shaped support blocks for mounting the sample support rod 14 are also installed on the inner left and right walls of the test area. The U-shaped support blocks are located above the V-shaped support blocks, and the V-shaped and U-shaped support blocks are staggered. The sample stage 13 has a V-shaped structure with a row of evenly arranged small holes at its tip to prevent salt water accumulation. A row of evenly distributed semi-circular slots is opened at the upper ends of its two walls, reducing the contact area between the sample and the sample stage 13 and accelerating the salt spray dissipation rate.

[0053] Among them, such as Figures 1-6 As shown in Figure 14, it also includes a bottom support plate 17. The bottom of the main housing 1 and the bottom of the auxiliary housing 101 are jointly mounted on the bottom support plate 17. The bottom support plate 17 improves the overall stability of the entire test apparatus when it is moved.

[0054] In addition, to ensure temperature stability of the entire test apparatus, insulation layers are installed on the exterior of both the main chamber 1 and the auxiliary chamber 101. For easy observation of the interior of chamber 1, the cover 2 is a transparent, heat-resistant, corrosion-resistant plastic sheet assembled and welded structure.

[0055] A specific application process of this embodiment is as follows: 1. Sample preparation and placement: Prepare the test sample according to the test requirements, and ensure that the sample surface is clean and free of contamination.

[0056] Open the chamber lid 2 and place the sample in the test area using the sample stand 13 and sample placement rod 14. Adjust the sample angle and position as needed to ensure that the sample is fully exposed to the salt spray environment.

[0057] Close lid 2 to ensure a good seal and prevent salt spray leakage.

[0058] 2. Parameter settings: The test temperature (e.g., 35℃±2℃) and test time can be set via the control panel 4.

[0059] The rotational speed of the axial fan 5 is set to control the airflow velocity and salt spray distribution uniformity within the test area.

[0060] Set the on and off times of the ultraviolet light source 15 to simulate the effect of day and night alternation on material corrosion (e.g., on for 1 hour, off for 2 hours).

[0061] 3. Start the equipment: Turn on the heating device 10 to gradually raise the temperature of the test area to the set value and keep it stable.

[0062] Turn on the axial flow fan 5, and distribute the salt spray evenly to every corner of the test area through the airflow distributor 6 and the airflow guide device 7.

[0063] Start the ultrasonic salt spray generator 3 to convert the salt water into fine salt spray particles and deliver them to the test area.

[0064] Turn on the ultraviolet light source 15 as needed to simulate the accelerating effect of UV components in sunlight on material corrosion.

[0065] 4. Real-time monitoring and adjustment: The salt spray concentration in the test area is monitored in real time by the salt spray metering device 8 to ensure that it fluctuates within the set range.

[0066] Observe the readings of temperature sensor 11 and humidity sensor 12 to ensure that the test environment meets the set requirements.

[0067] If necessary, fine-tuning can be performed via control panel 4.

[0068] Regularly check the condition of the samples in the test area and record any abnormalities (such as surface corrosion, discoloration, etc.).

[0069] 5. Stop the equipment: After the test time is up, turn off the ultrasonic salt spray generator 3, axial flow fan 5, heating device 10 and ultraviolet light source 15 in sequence.

[0070] Open box 2 and take out the sample for further observation and analysis.

[0071] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A salt spray test device simulating a salt spray environment, characterized in that: The test device consists of a main chamber (1) with an inner cavity and a top sealed water tank, a chamber cover (2), an ultrasonic salt spray generator (3), an axial flow fan (5), an airflow distributor (6), an airflow guide device (7), a salt spray metering device (8), and a control panel (4); A secondary box (101) is provided on one side of the main box (1), and the secondary box (101) has an inner cavity that communicates with the inner cavity of the main box (1); a salt water tank (9) with a recessed bottom is provided at the upper end of the secondary box (101) for storing salt water; the bottom of the ultrasonic salt spray generator (3) is connected to the salt water tank (9) through a conduit (31). The sub-box (101) is equipped with a heating device (10); The control panel (4) is mounted on the sub-box (101); A partition wall (102) is provided between the front and rear inner walls of the main box (1), and the partition wall (102) is provided with an inner cavity and communicates with the inner cavity of the main box (1); the interior of the main box (1) is divided into a test area on the left and a drying area on the right; a circulation channel (103) is provided between the lower end of the partition wall (102) and the inner bottom surface of the main box (1). The test area includes a temperature sensor (11), a humidity sensor (12), a sample stand (13), a sample placement rod (14), and the salt spray metering device (8). The drying zone includes the ultrasonic salt spray generator (3), the axial flow fan (5), and the airflow distributor (6); a partition sealing plate (104) is provided between the partition wall (102) and the inner wall on the right side of the main housing (1); the partition sealing plate (104) is vertically fixed with a return pipe (105) connected to the axial flow fan (5). The airflow guiding device (7) is installed on the box cover (2).

2. The salt spray test apparatus for simulating a salt spray environment according to claim 1, characterized in that, The brine tank (9) is provided with a brine tank cover plate (91), and a flip cover (92) is provided on the brine tank cover plate (91); an ultraviolet light source (15) is fixed through the upper end of the partition wall (102) near the front and rear inner walls of the main box (1) to irradiate the test area.

3. The salt spray test apparatus for simulating a salt spray environment according to claim 2, characterized in that, The ultraviolet light source (15) includes a glass tube (151) with one end open and a UV lamp tube (152) installed inside the glass tube (151); the glass tube (151) is fixed through the partition wall (102) and the open end of the glass tube (151) is located in the drying area; a reflective film (153) is pasted on the inner wall of the upper half of the glass tube (151).

4. The salt spray test apparatus for simulating a salt spray environment according to claim 1 or 3, characterized in that, The cover (2) is hinged to the main body (1) by a hinge member (16); the rear wall of the main body (1) is fixed with an overflow discharge pipe (106) and a wastewater discharge pipe (107) that are connected to the test area / drying area and equipped with valves; the side wall of the main body (1) is fixed with a heat transfer fluid filling pipe (108) that is connected to its inner cavity; the rear wall of the brine tank (9) is fixed with a brine discharge pipe (93) equipped with a valve, and the brine discharge pipe (93) passes through the rear wall of the auxiliary body (101).

5. The salt spray test apparatus for simulating a salt spray environment according to claim 4, characterized in that, The box cover (2) includes a rectangular frame (21) in the lower half; a cone-shaped dome (22) is provided at the upper end of the rectangular frame (21); a handle (23) is provided in the middle of the front wall of the rectangular frame (21); two parallel partition plates (24) are fixed together on the inner walls of the front and rear of the rectangular frame (21) and the inner wall of the cone-shaped dome (22). When the box cover (2) is placed on the main box (1), the two partition plates (24) are located directly above the partition wall (102); a connecting air duct (25) is fixed through the upper half of the middle of the two partition plates (24); a connecting salt spray pipe (26) is fixed through the lower half of the middle of the two partition plates (24); a row of shaft holes (27) is opened together on the side wall of the test area of ​​the two partition plates (24) and the rectangular frame (21), and the row of shaft holes (27) is located between the connecting air duct (25) and the connecting salt spray pipe (26).

6. The salt spray test apparatus for simulating a salt spray environment according to claim 5, characterized in that, The airflow guiding device (7) includes a rocking motor (71), a guide plate (72), a synchronization plate (73), and a connecting rod (74); the rocking motor (28) is mounted on the side wall of the partition plate (24) located on one side of the drying zone via a motor bracket, and the output shaft of the rocking motor (28) is coaxially arranged with one of the shaft holes (27); the guide plate (72) includes a shaft that mates with the shaft hole (27) and a pair of guide vanes symmetrically fixed on the shaft, and one end of the shaft is provided with an oval plug that mates with the connecting rod (74) and has a keyway; A row of air guide plates (72) is installed on one side of the test area of ​​the box cover (2), and the oval plug end of the air guide plate (72) passes through the two partition plates (24); the swing motor (28) is connected to the air guide plate (72) coaxially through a coupling and a key pin; the connecting rod (74) and the synchronization plate (73) are placed between the two partition plates (24); one end of the connecting rod (74) is sleeved on the oval plug of the connecting rod (74) and rotates synchronously, and the end of the connecting rod (74) is provided with a cylindrical head that passes through the synchronization plate (73) and rotates relative to it.

7. The salt spray test apparatus for simulating a salt spray environment according to claim 6, characterized in that, The airflow distributor (6) includes a main air duct (61) connected to the upper end of the axial flow fan (5), and the upper end of the main air duct (61) is closed; a first air duct branch (62) located on the upper side and a second air duct branch (63) located on the lower side are connected to the main air duct (61); when the cover (2) is closed, the first air duct branch (62) is connected to the connecting air duct (25), and the second air duct branch (63) is connected to the connecting salt spray duct (26); the lower half of the second air duct branch (63) is connected to a salt spray delivery connecting pipe (64) connected to the upper end of the ultrasonic salt spray generator (3); a first air volume regulating valve (65) is provided on the first air duct branch (62); a second air volume regulating valve (66) is provided on the second air duct branch (63).

8. The salt spray test apparatus for simulating a salt spray environment according to claim 7, characterized in that, An arc-shaped air guide plate (28) is fixed between the lower half of the left end of the connecting air guide pipe (25) and the inner left wall of the rectangular frame (21); three pairs of V-shaped support blocks for installing the sample platform (13) are installed on the left and right inner walls of the test area; two pairs of U-shaped support blocks for installing the sample placement rod (14) are installed on the left and right inner walls of the test area; the U-shaped support blocks are located above the V-shaped support blocks, and the V-shaped support blocks and the U-shaped support blocks are staggered.

9. The salt spray test apparatus for simulating a salt spray environment according to claim 1, characterized in that, It also includes a bottom support plate (17); the bottom of the main box (1) and the bottom of the auxiliary box (101) are mounted together on the bottom support plate (17).

10. The salt spray test apparatus for simulating a salt spray environment according to claim 1, characterized in that, The main box (1) and the auxiliary box (101) are both equipped with a heat insulation layer; the box cover (2) is transparent.

Images