A salt spray test apparatus for marine sanitation unit detection

Abstract

This invention discloses a salt spray testing device for marine sanitary unit testing, belonging to the technical field of salt spray testing equipment. It includes a salt spray chamber, a salt solution supply mechanism, an atomizer, and a sampler. The salt spray chamber is connected to a pressurization mechanism. The salt solution supply mechanism includes a salt solution tank and at least one set of telescopic units. The salt solution tank contains an intermediate shaft and a drive mechanism. The telescopic unit includes a rotating ring rotatably sealed to the inner wall of the tank, at least one stirring element, and a stirring plate. The two ends of the stirring element are respectively connected to the intermediate shaft and the rotating ring. The intermediate shaft eccentrically rotates or reciprocates axially, driving the stirring element to revolve and periodically extend and retract, forming a composite flow field within the tank to mix the salt solution. A scraper on the rotating ring can also clean salt scale from the tank walls and bottom. This invention ensures uniform and stable salt solution concentration, eliminates scale buildup, effectively improves the accuracy of salt spray testing, and reduces equipment maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of salt spray testing equipment technology, specifically a salt spray testing equipment for marine sanitary unit testing. Background Technology

[0002] Marine sanitary units need to be used for a long time in the high salt spray environment of the ocean. Their corrosion resistance needs to be tested by salt spray testing equipment. The stability of salt concentration is the core prerequisite for ensuring the accuracy of test results.

[0003] The salt supply system of existing salt spray testing equipment is prone to sedimentation and accumulation at the bottom of the tank and scaling on the tank wall, resulting in a concentration gradient between the upper and lower layers of salt solution inside the tank. The actual concentration of the output salt solution deviates significantly from the prepared concentration, and the salt spray concentration fluctuates significantly during long-term continuous testing, making it difficult to guarantee the reliability of the test results of marine sanitary units. Summary of the Invention

[0004] The purpose of this invention is to provide a salt spray testing device for marine sanitary unit testing, in order to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a salt spray test device for marine sanitary unit testing, comprising a salt spray chamber, a salt solution supply mechanism, an atomizer, and a sampler; the salt spray chamber is connected to a pressurization mechanism, and the sampler is installed on the salt spray chamber;

[0006] The salt solution supply mechanism includes a salt solution tank and at least one telescopic unit. The salt solution tank is mounted on the salt mist box and connected to the atomizer. An intermediate shaft is installed inside the salt solution tank, and one end of the intermediate shaft passes through the salt solution tank and is connected to a drive mechanism.

[0007] The telescopic unit includes a rotating ring and at least one stirring element. The rotating ring is rotatably and sealingly installed on the inner wall of the brine tank. One end of the stirring element is installed on the intermediate shaft, and the other end of the stirring element is connected to the rotating ring through a connector.

[0008] The stirring component is equipped with a stirring plate.

[0009] The axis of the intermediate shaft is eccentrically set to the axis of the brine tank;

[0010] The drive mechanism includes a drive motor mounted on the brine tank, and the output end of the drive motor is connected to the intermediate shaft.

[0011] The rotating ring is coaxially arranged with the brine tank, and the stirring element periodically expands and contracts as the intermediate shaft rotates eccentrically.

[0012] The connector is a universal joint. For further optimization, a cross-shaft universal joint or a ball cage constant velocity universal joint can be selected. A flexible isolation sleeve is provided on the outside of the universal joint. The two ends of the isolation sleeve are sealed to the rotating ring and the telescopic end of the agitator. The isolation sleeve prevents sodium chloride solution and impurities from entering the interior of the universal joint or the connection position at both ends of the universal joint.

[0013] The pressurization mechanism includes a booster, pipes, and a pressure sensor. The booster is installed on the salt spray chamber, and the pressure sensor is located inside the salt spray chamber. The booster is connected to the inside of the salt spray chamber through the pipes. The booster pressurizes the inside of the salt spray chamber through the pipes, and the pressure sensor detects the pressure inside the salt spray chamber to ensure that the pressure inside the salt spray chamber reaches the test standard.

[0014] The agitator is an elastic telescopic structure; in the initial state, the agitator is in an inclined state; the fixed end of the agitator is mounted on the intermediate shaft, and the telescopic end of the agitator is connected to the inner wall of the rotating ring through a universal joint. The fixed end and the telescopic end are connected by an elastic structure or spring.

[0015] The brine tank is connected to an inlet pipe and an outlet pipe. The inlet pipe is used to add sodium chloride solution, and the outlet pipe is connected to the atomizer. Both the inlet and outlet pipes are equipped with valves and flow meters to enable the discharge, shut-off, and flow monitoring of the sodium chloride solution.

[0016] The atomizer uses a conventional airflow salt spray atomizing nozzle, which is connected to the salt solution tank via a liquid outlet pipe. At the same time, a delivery pump is connected in series with the liquid outlet pipe to deliver the mixed sodium chloride solution into the nozzle, which is then atomized and sprayed out.

[0017] The axis of the intermediate shaft and the axis of the brine tank are concentrically arranged. With the coaxial arrangement, the radius of rotation of the stirring component is constant when it rotates, the circumferential force of the rotating ring is uniform, there is no periodic off-center load impact, the vibration and noise during equipment operation are lower, the wear of transmission components is less, it is more suitable for the working conditions of long-term continuous testing of marine sanitary units, and the service life of the equipment is longer.

[0018] The drive mechanism includes a drive motor and a linear motion mechanism mounted on the brine tank, as well as a splined cylinder;

[0019] The splined cylinder is slidably connected to the output end of the drive motor. An anti-rotation disc is rotatably mounted on the outside of the splined cylinder. The splined cylinder is connected to the intermediate shaft, and the anti-rotation disc is connected to the output end of the linear motion mechanism.

[0020] The stirring component includes a sleeve and a slide, and an elastic element is connected between the sleeve and the slide.

[0021] One end of the sleeve is mounted on the intermediate shaft, and the other end of the sleeve is provided with a spline groove;

[0022] One end of the slide cylinder is rotatably connected to the rotating ring via a universal joint, and the other end of the slide cylinder is provided with a spline that slides in conjunction with the spline groove. The slide cylinder is slidably installed in the sleeve through the cooperation of the spline and the spline groove.

[0023] The stirring plate is mounted on the slide.

[0024] The stirring plate is provided with a number of through holes, which are evenly distributed along the surface of the stirring plate. The axis of the through holes is perpendicular to or inclined to the surface of the stirring plate.

[0025] The diameter of the several through holes decreases sequentially along the length of the stirring plate.

[0026] The salt spray chamber is rotatably mounted with a lid. Inside the salt spray chamber, a water tank and a shelf are arranged in sequence. A sealing structure, such as a sealing ring or sealing collar, is provided on the side of the salt spray chamber and the lid facing each other. The water tank and shelf are arranged from bottom to top inside the salt spray chamber.

[0027] The rotating ring is equipped with several main scrapers in a ring shape. The main scrapers are in contact with the inner wall of the brine tank. The inner wall of the rotating ring is provided with secondary scrapers, which are in contact with the bottom of the brine tank.

[0028] The main scraper has a right-angled triangle cross-section, and the surface where the hypotenuse of the main scraper is located is in contact with the inner wall of the brine tank. The frontal surface where the long right-angle side of the main scraper is located is provided with a wave groove.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. Composite mixing is achieved through the expansion and contraction of the stirring components, eliminating mixing dead zones and ensuring experimental accuracy. Driven by an eccentric rotation or axial reciprocating movement of the central shaft, combined with the elastically expandable stirring component structure, the stirring plate reciprocates along its own axis while revolving around the shaft. This creates a composite flow field within the brine tank, combining circumferential swirling flow with radial / axial disturbances. This effectively disperses sodium chloride sedimentation particles, eliminates concentration gradients between the upper and lower layers of the tank, and ensures uniform and stable brine concentration. This solves the technical problems of existing stirring methods, such as a single flow field, easy concentration stratification, and fluctuations in salt spray output concentration.

[0031] 2. Automatic removal of sodium chloride particles from the inner wall and bottom of the tank. A main scraper and a secondary scraper are respectively installed on the rotating ring, adhering to the inner wall and bottom of the brine tank. They rotate synchronously with the ring. The main scraper peels off salt crystals adhering to the tank wall, while the secondary scraper scrapes up the salt layer deposited at the bottom, allowing the peeled salt to be re-injected into the agitated flow field for dissolution. This thoroughly removes salt deposits from the tank walls and bottom, preventing long-term scale buildup that leads to lower actual brine concentration and accelerated tank corrosion. It also reduces the frequency of downtime for cleaning, lowers maintenance costs, and solves the technical problems of scale buildup and high maintenance workload in brine tanks. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the sampler in this invention;

[0034] Figure 3 This is a schematic diagram of the atomizer in this invention;

[0035] Figure 4 This is a schematic diagram of the structure of the intermediate shaft in this invention;

[0036] Figure 5 This is a schematic diagram of the brine tank in this invention;

[0037] Figure 6 This is a schematic diagram of the stirring plate in this invention;

[0038] Figure 7 This is a schematic diagram of the structure of the sleeve and the slide in this invention;

[0039] Figure 8 This is a schematic diagram of the rotating ring structure in this invention;

[0040] Figure 9 This is a schematic diagram of the linear motion mechanism in this invention;

[0041] Figure 10 This is a schematic diagram of the structure of the turntable in this invention;

[0042] Figure 11 This is a schematic diagram of the elastic element in this invention;

[0043] Figure 12 This is a schematic diagram of the structure of the main scraper and the auxiliary scraper in this invention.

[0044] In the picture: 1. Salt spray chamber; 11. Chamber lid; 12. Water tank; 13. Shelf;

[0045] 2. Brine supply mechanism; 21. Brine tank; 22. Telescopic unit; 221. Rotating ring; 2211. Main scraper; 2212. Secondary scraper; 222. Stirring component; 2221. Sleeve; 2222. Slide tube; 223. Stirring plate; 23. Intermediate shaft; 24. Drive mechanism; 241. Drive motor; 242. Linear movement mechanism; 243. Splined cylinder; 244. Anti-rotation disc; 3. Atomizer; 4. Sampler. Detailed Implementation

[0046] 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] like Figures 1-7 As shown in Embodiment 1 of the present invention, a salt spray test device for marine sanitary unit testing is provided.

[0048] The specific content of Embodiment 1 is as follows: A salt spray test device for marine sanitary unit testing includes a salt spray chamber 1, a salt solution supply mechanism 2, an atomizer 3, and a sampler 4; the salt spray chamber 1 is connected to a pressurizing mechanism, and the sampler 4 is installed on the salt spray chamber 1; the salt solution supply mechanism 2 includes a salt solution tank 21 and at least one telescopic unit 22, the salt solution tank 21 is set on the salt spray chamber 1, the salt solution tank 21 is connected to the atomizer 3, an intermediate shaft 23 is installed inside the salt solution tank 21, one end of the intermediate shaft 23 passes through the salt solution tank 21 and is connected to a drive mechanism 24; the telescopic unit 22 includes a rotating ring 221 and at least one stirring element 222, the rotating ring 221 is rotatably and sealingly installed on the inner wall of the salt solution tank 21, one end of the stirring element 222 is installed on the intermediate shaft 23, and the other end of the stirring element 222 is connected to the rotating ring 221 through a connector; a stirring plate 223 is installed on the stirring element 222.

[0049] The axis of the intermediate shaft 23 is eccentrically set with respect to the axis of the brine tank 21; the drive mechanism 24 includes a drive motor 241 mounted on the brine tank 21, and the output end of the drive motor 241 is connected to the intermediate shaft 23; the rotating ring 221 is coaxially set with the brine tank 21, and the stirring element 222 periodically extends and retracts with the eccentric rotation of the intermediate shaft 23.

[0050] A lid 11 is rotatably mounted on the salt spray chamber 1. Inside the salt spray chamber 1, a water tank 12 and a shelf 13 are arranged in sequence. A sealing structure is provided on the side of the salt spray chamber 1 and the lid 11 that is directly opposite each other. The sealing structure (not shown in the figure) includes a sealing ring, a sealing ring, etc. Inside the salt spray chamber 1, the water tank 12 and the shelf 13 are arranged in sequence from bottom to top.

[0051] In this embodiment, the connecting component is a universal joint. As a further optimization design, a cross-shaft universal joint or a ball cage constant velocity universal joint can be selected (the universal joint in the attached figure is a simplified drawing). A flexible isolation sleeve (not shown in the figure) is provided on the outside of the universal joint. The two ends of the isolation sleeve are sealed to the telescopic ends of the rotating ring 221 and the stirring component 222. The isolation sleeve prevents sodium chloride solution and impurities from entering the interior of the universal joint or the connection positions at both ends of the universal joint.

[0052] In this embodiment, the pressurization mechanism (not shown in the figure) includes a booster, a pipeline, and a pressure sensor. The booster is installed on the salt spray chamber 1, and the pressure sensor is located inside the salt spray chamber 1. The booster is connected to the inside of the salt spray chamber 1 through the pipeline. The booster pressurizes the inside of the salt spray chamber 1 through the pipeline, and the pressure sensor detects the pressure inside the salt spray chamber 1 to make the pressure inside the salt spray chamber 1 reach the test standard.

[0053] In this embodiment, the stirring element 222 is an elastic telescopic structure, and the stirring element 222 is in an inclined state; the fixed end of the stirring element 222 is installed on the intermediate shaft 23, and the telescopic end of the stirring element 222 is connected to the inner wall of the rotating ring 221 through a universal joint. The fixed end and the telescopic end are connected by an elastic structure or a spring.

[0054] In this embodiment, the brine tank 21 is connected to an inlet pipe and an outlet pipe. The inlet pipe is used to add sodium chloride solution, and the outlet pipe is connected to the atomizer 3. Both the inlet pipe and the outlet pipe are equipped with valves and flow meters to realize the discharge, shut-off and flow monitoring of sodium chloride solution.

[0055] In this embodiment, the atomizer 3 adopts a conventional airflow salt spray atomizing nozzle. The nozzle is connected to the salt solution tank 21 through the liquid outlet pipe. At the same time, a delivery pump (not shown in the figure) is connected in series with the liquid outlet pipe to deliver the mixed sodium chloride solution into the nozzle, and then atomizes and sprays it out through the nozzle.

[0056] The working steps of this embodiment are as follows:

[0057] During the test preparation stage, the staff can place the marine sanitary unit sample to be tested on the shelf 13 by turning the open box cover 11, close the valve in the liquid outlet pipe, put an appropriate amount of clean water in the water tank 12, and add a certain amount of sodium chloride solution to the salt solution tank 21 through the liquid inlet pipe. After closing the box cover 11, the sealing structure at the joint fills the gap between the box cover 11 and the salt spray box 1.

[0058] When the flow meter on the inlet pipe detects that the sodium chloride solution has been added to the predetermined amount, it feeds back the flow signal to the control system, which then starts the drive motor 241. The drive motor 241 drives the intermediate shaft 23 to rotate, and the intermediate shaft 23 drives the stirring element 222 to revolve around the axis of the intermediate shaft 23. The telescopic end of the stirring element 222 drives the rotating ring 221 to rotate synchronously along the inner wall of the brine tank 21 through the universal joint.

[0059] Because the axis of the intermediate shaft 23 is eccentrically positioned relative to the axes of the brine tank 21 and the rotating ring 221, the distance between the fixed end and the telescopic end of the agitator 222 changes periodically with the revolution angle during its revolution, as follows:

[0060] When the stirring component 222 rotates to the inner wall of the rotating ring 221 away from the eccentric side, the distance between the two ends increases, the elastic structure or spring releases the elastic force, and pushes the telescopic end of the stirring component 222 to extend outward.

[0061] When the agitator 222 rotates to the inner wall of the rotating ring 221 near the eccentric side, the distance between the two ends decreases. The inner wall of the rotating ring 221 applies a reverse compressive force to the agitator 222 through the universal joint, pushing the telescopic end of the agitator 222 to compress the elastic structure or spring and retract inward.

[0062] During the aforementioned extension and retraction process, the universal joint adaptively deflects according to the periodic change of the tilt angle of the stirring component 222. On the one hand, it continuously transmits the revolution motion of the stirring component 222 to the rotating ring 221, and on the other hand, it eliminates the additional bending moment caused by the change of tilt angle, thus avoiding transmission jamming. At the same time, the stirring plate 223 reciprocates along the axial direction of the stirring component 222 while the stirring component 222 revolves around the intermediate shaft 23. This forms a composite flow field in the salt solution tank 21, which combines circumferential swirling flow and radial disturbance. This effectively disperses the sedimented particles in the sodium chloride solution, eliminates the concentration gradient between the upper and lower layers in the tank, ensures a uniform and stable salt solution concentration, and ensures the accuracy of the salt spray test.

[0063] After stirring, the control system opens the valve on the outlet pipe, and the uniformly concentrated sodium chloride solution is delivered to the atomizer 3 through the outlet pipe. At the same time, the pressurizing mechanism introduces compressed air into the salt spray chamber 1, and the atomizer 3 atomizes the sodium chloride solution to form salt mist and sprays it into the salt spray chamber 1. The salt mist settles freely in the salt spray chamber 1, and a continuous salt spray corrosion test is carried out on the marine sanitary unit sample placed on the shelf 13. The clean water in the water tank 12 is used to maintain the humidity environment inside the chamber to prevent the salt mist from condensing and dripping too early. The sealing structure between the cover 11 and the salt spray chamber 1 is used to prevent the salt mist from leaking out.

[0064] After atomization, a portion of the sodium chloride solution settles and is collected in sampler 4. Staff members use sampler 4 to sample and analyze the amount and concentration of salt spray sedimentation.

[0065] By eccentrically setting the intermediate shaft 23 and the salt solution tank 21, the stirring element 222 can be extended and retracted, so that the stirring element 222 drives the stirring plate 223 to mix at different positions inside the salt solution tank 21. This avoids concentration stratification after the sodium chloride solution has been left to stand for a long time, ensures the uniformity of the sodium chloride solution, and guarantees the accuracy of the salt spray test.

[0066] After the test was completed, the staff opened the box cover 11 and took out the marine sanitary unit sample.

[0067] like Figures 8-10 As shown, in Embodiment 2 of the present invention, a drive mechanism 24 different from that in Embodiment 1 is provided. In this embodiment, the eccentric setting of the brine tank 21 and the intermediate shaft 23 is modified to a concentric setting, and a linear movement mechanism 242 and a splined cylinder 243 are added to realize the extension and retraction of the stirring component 222. Compared with Embodiment 1, which uses the intermediate shaft 23 to be eccentrically arranged and relies on the eccentric rotation to passively trigger the extension and retraction of the stirring component 222, this embodiment has no periodic off-center load impact, the vibration and noise during equipment operation are lower, the wear of transmission components is less, it is more suitable for the working conditions of long-term continuous testing of marine sanitary units, and the service life of the equipment is longer.

[0068] The specific details of Embodiment 2 are as follows: The axis of the intermediate shaft 23 and the axis of the brine tank 21 are concentrically arranged. Under the coaxial arrangement, the radius of rotation of the stirring component 222 is constant when it rotates, the rotating ring 221 is subjected to uniform force in the circumference, there is no periodic off-center load impact, and the vibration and noise are lower during the operation of the equipment; the drive mechanism 24 includes a drive motor 241 and a linear movement mechanism 242 installed on the brine tank 21, as well as a splined cylinder 243; the splined cylinder 243 is slidably connected to the output end of the drive motor 241, and an anti-rotation disk 244 is rotatably installed on the outside of the splined cylinder 243. The splined cylinder 243 is connected to the intermediate shaft 23, and the anti-rotation disk 244 is connected to the output end of the linear movement mechanism 242.

[0069] In this embodiment, the linear motion mechanism 242 is an electric push rod, cylinder, or hydraulic cylinder, etc., that can output linear reciprocating motion. The operator can independently control the reciprocating stroke and motion frequency of the intermediate shaft 23 through the linear motion mechanism 242. The axial disturbance intensity can be changed independently without adjusting the speed of the drive motor 241. The stirring parameters can be flexibly matched according to the volume of the brine tank 21 and the initial concentration of the brine. It can achieve efficient mixing for brine with different ratios and volumes, and the equipment has stronger adaptability.

[0070] In this embodiment, an internal spline is provided inside the spline cylinder 243, and an external spline is correspondingly provided on the output end of the drive motor 241. The internal spline and the external spline are slidably connected. The spline cylinder 243 moves along the axial direction of the output end of the drive motor 241 through the internal spline and the external spline. An anti-rotation disc 244 is rotatably mounted on the outside of the spline cylinder 243 through a bearing. The bearing can ensure that the spline cylinder 243 cannot drive the anti-rotation disc 244 to rotate, so that the anti-rotation disc 244 can only move under the drive of the linear motion mechanism 242.

[0071] The working steps of this embodiment are as follows:

[0072] When the flow meter on the inlet pipe detects that the sodium chloride solution has been added to the predetermined amount, it feeds back the flow signal to the control system, which then simultaneously starts the drive motor 241 and the linear motion mechanism 242. The output end of the drive motor 241 drives the spline cylinder 243 to rotate through the cooperation of the external and internal splines. The spline cylinder 243 drives the intermediate shaft 23 to rotate synchronously. The intermediate shaft 23 drives the stirring element 222 to revolve around the axis of the intermediate shaft 23. The telescopic end of the stirring element 222 drives the rotating ring 221 to rotate synchronously along the inner wall of the brine tank 21 through the universal joint.

[0073] At the same time, the linear motion mechanism 242 pushes the anti-rotation disk 244 to reciprocate along the axial direction. The anti-rotation disk 244 drives the spline cylinder 243 to reciprocate synchronously along the axial direction through the bearing. The spline cylinder 243 slides axially relative to the output end of the drive motor 241 and drives the intermediate shaft 23 to reciprocate synchronously along the axial direction.

[0074] Since the intermediate shaft 23 is concentrically arranged with the brine tank 21, the radius of gyration of the fixed end of the stirring element 222 remains constant during its revolution. The axial reciprocating movement of the intermediate shaft 23 causes the fixed end of the stirring element 222 to reciprocate axially. The axial position of the telescopic end of the stirring element 222 is restricted due to its connection to the rotating ring 221 via a universal joint. Therefore, the distance between the fixed end and the telescopic end of the stirring element 222 changes periodically with the axial displacement of the intermediate shaft 23, as detailed below:

[0075] When the intermediate shaft 23 moves away from the rotating ring 221, the intermediate shaft 23 pulls the telescopic end of the stirring component 222 outward, so that the distance between the two ends of the stirring component 222 increases, and the elastic structure or spring is simultaneously stretched.

[0076] When the intermediate shaft 23 moves toward the rotating ring 221, the elastic structure or spring is released, and the elastic structure or spring pulls the telescopic end of the stirring element 222 back, so as to reduce the distance between the two ends of the stirring element 222.

[0077] As the intermediate shaft 23 reciprocates, the telescopic end of the stirring element 222 extends and retracts, and the telescopic end of the stirring element 222 drives the stirring plate 223 to move accordingly, so as to mix the sodium chloride solution at different positions and ensure the accuracy of the test.

[0078] During the aforementioned extension and retraction process, the universal joint adaptively deflects according to the periodic change of the tilt angle of the stirring component 222. On the one hand, it continuously transmits the revolution motion of the stirring component 222 to the rotating ring 221, and on the other hand, it eliminates the additional bending moment caused by the change of tilt angle, thus avoiding transmission jamming. At the same time, the stirring plate 223 reciprocates along the axial direction of the stirring component 222 while the stirring component 222 revolves around the intermediate shaft 23. This forms a composite flow field in the brine tank 21 that combines circumferential swirling flow and axial disturbance, effectively dispersing the sedimented particles in the sodium chloride solution, eliminating the concentration gradient between the upper and lower layers in the tank, and ensuring a uniform and stable brine concentration.

[0079] like Figure 11 As shown, Embodiment 3 of the present invention further optimizes the design based on Embodiment 1 or Embodiment 2, and provides a specific implementation of the stirring component 222.

[0080] The specific content of Embodiment 3 is as follows: The stirring component 222 includes a sleeve 2221 and a slide 2222, and an elastic element is connected between the sleeve 2221 and the slide 2222; one end of the sleeve 2221 is mounted on the intermediate shaft 23, and the other end of the sleeve 2221 is provided with a spline groove; one end of the slide 2222 is rotatably connected to the rotating ring 221 through a universal joint, and the other end of the slide 2222 is provided with a spline that slides in cooperation with the spline groove; the slide 2222 is slidably mounted in the sleeve 2221 through the cooperation of the spline and the spline groove; the stirring plate 223 is mounted on the slide 2222.

[0081] In this embodiment, the elastic element is a return spring, which is connected to the sleeve 2221 and the slide 2222 respectively.

[0082] The working steps of this embodiment are as follows:

[0083] The stirring element 222 in this embodiment can be applied to the eccentric rotation drive method of Embodiment 1 or the concentric axial reciprocating drive method of Embodiment 2. Its working process is as follows:

[0084] When the intermediate shaft 23 rotates, the sleeve 2221 rotates synchronously with the intermediate shaft 23. The sleeve 2221 transmits torque to the slide 2222 through the spline groove and spline, so that the slide 2222 drives the stirring plate 223 to revolve synchronously.

[0085] When the telescopic end of the stirring element 222 retracts inward (corresponding to the stirring element 222 rotating to the side closer to the eccentric side in Embodiment 1, or the intermediate shaft 23 moving towards the rotating ring 221 in Embodiment 2), the slide cylinder 2222 retracts into the sleeve 2221 along the spline groove, and the slide cylinder 2222 compresses the return spring at the same time.

[0086] When the telescopic end of the stirring element 222 extends outward (corresponding to the stirring element 222 rotating away from the eccentric side in Embodiment 1, or the intermediate shaft 23 moving away from the rotating ring 221 in Embodiment 2), the reset spring releases its elastic force, pushing the slide cylinder 2222 to extend outward along the spline groove.

[0087] During this process, the spline groove and spline cooperation ensures reliable torque transmission between the slide 2222 and the sleeve 2221, preventing circumferential movement of the slide 2222 relative to the sleeve 2221. On the other hand, it provides precise guidance for the axial reciprocating extension and retraction of the slide 2222, preventing swaying and jamming during the extension and retraction process. The stirring plate 223 reciprocates axially while the slide 2222 revolves around the center of gravity, forming a composite flow field in the brine tank 21 that combines circumferential swirling flow with radial / axial disturbance. This effectively disperses the sedimented particles in the sodium chloride solution, ensuring a uniform and stable brine concentration.

[0088] like Figures 5-12 As shown, in Embodiment 4 of the present invention, based on Embodiment 1, Embodiment 2 or Embodiment 3, the design is further optimized to provide a specific structure of the stirring plate 223, which improves the dispersion effect of the precipitated particles in the sodium chloride solution.

[0089] The specific details of Embodiment 4 are as follows: A plurality of through holes are provided on the stirring plate 223, the through holes being evenly distributed along the surface of the stirring plate 223, and the axis of the through holes being perpendicular to or inclined to the surface of the stirring plate 223. The diameter of the plurality of through holes decreases sequentially along the length of the stirring plate 223.

[0090] The working steps of this embodiment are as follows:

[0091] While the sodium chloride solution is being stirred by the stirring plate 223, the sodium chloride solution in the brine tank 21 continuously flows through the through hole on the stirring plate 223.

[0092] When the through-hole axis is set perpendicular to the plate surface, the solution will form a local high-speed jet at the through-hole outlet after passing through the plate surface perpendicularly. This will generate a strong shearing effect, directly breaking up the aggregated and settled sodium chloride fine particles in the solution, and forming a large number of micro-scale turbulence on the basis of the original large-scale flow field.

[0093] When the through-hole axis is inclined, the solution flowing through it will generate a diversion component along the axial direction of the stirring plate 223, which will form an additional axial liquid flow driving force in addition to the circumferential swirling flow, accelerating the convection exchange between the upper and lower layers of solution in the tank.

[0094] The uniformly distributed through holes ensure that the disturbance intensity is uniform and consistent throughout the entire section of the stirring plate 223, eliminating the stirring blind zone; through the shearing and diversion effect of the through holes, the mixing efficiency of the brine can be further improved, the concentration gradient in the tank can be eliminated more quickly, and the brine concentration can reach a uniform and stable state in a shorter time.

[0095] As a further optimization, the diameter of several through holes decreases sequentially along the length of the stirring plate 223. When the stirring plate 223 revolves, the linear velocity of the inner region near the central shaft 23 is low, and the large orifice diameter can ensure the flow rate and avoid insufficient mixing intensity in the central region; the linear velocity of the outer region near the rotating ring 221 is high, and the small orifice diameter can enhance the liquid flow shearing effect, disperse the sedimented particles near the tank wall, make the overall flow field disturbance intensity in the tank more balanced, and further improve the mixing efficiency of the brine.

[0096] like Figure 12 As shown, Embodiment 5 of the present invention is a further optimized design based on Embodiment 1 or Embodiment 2. While ensuring the mixing effect of sodium chloride solution, it can scrape off the sediment particles on the inner wall and bottom of the brine tank 21.

[0097] The specific content of Embodiment 5 is as follows: a plurality of main scrapers 2211 are installed in a ring on the rotating ring 221. The main scrapers 2211 are in contact with the inner wall of the brine tank 21. A secondary scraper 2212 is provided on the inner wall of the rotating ring 221. The secondary scraper 2212 is in contact with the bottom of the brine tank 21.

[0098] The working steps of this embodiment are as follows:

[0099] When the rotating ring 221 rotates, it synchronously drives the main scraper 2211 and the auxiliary scraper 2212 to rotate. The main scraper 2211 continuously scrapes along the inner side wall of the tank, peeling off the salt crystals and sedimented particles attached to the tank wall from the wall surface. The auxiliary scraper 2212 continuously scrapes along the inner wall of the tank bottom, scraping up the sodium chloride salt layer that has settled and accumulated at the bottom of the tank, and re-injecting it into the stirring flow field.

[0100] The main scraper 2211 and the auxiliary scraper 2212 work together to thoroughly remove salt deposits from the tank walls and bottom, preventing problems such as low actual salt concentration and increased tank wall corrosion caused by salt scale buildup after long-term operation. The scraped salt particles can be quickly dissolved and dispersed by the stirring flow field, ensuring that the salt concentration in the tank is always consistent with the prepared concentration. At the same time, it can reduce the frequency of equipment shutdown for cleaning, reduce maintenance costs, and extend the service life of the salt tank 21.

[0101] like Figure 12 As shown, Embodiment Six of the present invention further optimizes the design based on Embodiment Five, and provides a specific implementation of the main scraper 2211 to improve the dispersing and mixing effect of sodium chloride solution.

[0102] The specific details of Example 6: The cross-section of the main scraper 2211 is a right-angled triangle. The surface where the hypotenuse of the main scraper 2211 is located is in contact with the inner wall of the brine tank 21. A wave groove is provided on the front surface where the long right-angle side of the main scraper 2211 is located.

[0103] The working steps of this embodiment are as follows:

[0104] When the rotating ring 221 drives the main scraper 2211 to rotate, the beveled surface fits against the tank wall in a wedge-shaped manner, resulting in less scraping resistance and smooth removal of firmly attached salt scale from the tank wall. This ensures good contact between the scraping surface and the tank wall, improving cleaning efficiency. When the brine flows through the wavy groove on the long right-angled side of the main scraper 2211, multiple small local vortices are formed at the concave-convex structure of the groove. These vortices exert continuous shearing and impact on the salt scale particles that have just been removed from the wall, causing them to break down quickly and dissolve into the surrounding solution. The right-angled triangular cross-section structure reduces the resistance during scraping, decreases the load on the drive mechanism 24, and ensures thorough scraping. The local vortices generated by the wavy groove accelerate the dispersion and dissolution of the scraped salt scale, preventing particles from re-adhering to the tank wall, further enhancing the anti-deposition effect, and also helping to improve the mixing efficiency of the solution.

[0105] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A salt spray testing device for marine sanitary unit testing, characterized in that: It includes a salt spray chamber (1), a salt supply mechanism (2), an atomizer (3), and a sampler (4); the salt spray chamber (1) is connected to a pressurizing mechanism, and the sampler (4) is installed on the salt spray chamber (1); The salt supply mechanism (2) includes a salt tank (21) and at least one telescopic unit (22). The salt tank (21) is installed on the salt mist box (1). The salt tank (21) is connected to the atomizer (3). An intermediate shaft (23) is installed inside the salt tank (21). One end of the intermediate shaft (23) passes through the salt tank (21) and is connected to a drive mechanism (24). The telescopic unit (22) includes a rotating ring (221) and at least one stirring element (222). The rotating ring (221) is rotatably and sealingly installed on the inner wall of the brine tank (21). One end of the stirring element (222) is installed on the intermediate shaft (23), and the other end of the stirring element (222) is connected to the rotating ring (221) through a connector. A stirring plate (223) is installed on the stirring component (222).

2. The salt spray testing equipment for marine sanitary unit testing according to claim 1, characterized in that: The axis of the intermediate shaft (23) is eccentrically set with respect to the axis of the brine tank (21); The drive mechanism (24) includes a drive motor (241) mounted on the brine tank (21), and the output end of the drive motor (241) is connected to the intermediate shaft (23); The rotating ring (221) is coaxially arranged with the brine tank (21), and the stirring element (222) periodically extends and retracts with the eccentric rotation of the intermediate shaft (23).

3. The salt spray testing equipment for marine sanitary unit testing according to claim 1, characterized in that: The axis of the intermediate shaft (23) and the axis of the brine tank (21) are concentrically arranged; The drive mechanism (24) includes a drive motor (241) and a linear motion mechanism (242) mounted on the brine tank (21), as well as a splined cylinder (243). The splined cylinder (243) is slidably connected to the output end of the drive motor (241). An anti-rotation disk (244) is rotatably mounted on the outside of the splined cylinder (243). The splined cylinder (243) is connected to the intermediate shaft (23). The anti-rotation disk (244) is connected to the output end of the linear motion mechanism (242).

4. A salt spray testing device for marine sanitary unit testing according to claim 2 or 3, characterized in that: The stirring component (222) includes a sleeve (2221) and a slide (2222), and an elastic element is connected between the sleeve (2221) and the slide (2222); One end of the sleeve (2221) is mounted on the intermediate shaft (23), and the other end of the sleeve (2221) is provided with a spline groove; One end of the slide cylinder (2222) is rotatably connected to the rotating ring (221) via a universal joint, and the other end of the slide cylinder (2222) is provided with a spline that slides with the spline groove. The slide cylinder (2222) is slidably installed in the sleeve (2221) through the cooperation of the spline and the spline groove. The stirring plate (223) is mounted on the slide (2222).

5. The salt spray testing equipment for marine sanitary unit testing according to claim 1, characterized in that: The stirring plate (223) is provided with a number of through holes, and the axis of the through holes is perpendicular to or inclined to the surface of the stirring plate (223).

6. The salt spray testing equipment for marine sanitary unit testing according to claim 5, characterized in that: The diameter of the several through holes decreases sequentially along the length of the stirring plate (223).

7. The salt spray testing equipment for marine sanitary unit testing according to claim 1, characterized in that: The salt spray chamber (1) is rotatably mounted with a lid (11). Inside the salt spray chamber (1), there is a water tank (12) and a shelf (13) arranged in sequence. A sealing structure is provided on the side of the salt spray chamber (1) and the lid (11) facing each other.

8. The salt spray testing equipment for marine sanitary unit testing according to claim 1, characterized in that: The rotating ring (221) is equipped with several main scrapers (2211) in a ring shape. The main scrapers (2211) are in contact with the inner wall of the brine tank (21). The inner wall of the rotating ring (221) is provided with a secondary scraper (2212), which is in contact with the bottom of the brine tank (21).

9. A salt spray testing device for marine sanitary unit testing according to claim 8, characterized in that: The cross-section of the main scraper (2211) is a right triangle. The surface where the hypotenuse of the main scraper (2211) is located is in contact with the inner wall of the brine tank (21). The front surface where the long right-angle side of the main scraper (2211) is located is provided with a wave groove.

Images