Broad-spectrum salt mist artificial simulation system

Abstract

In order to simulate the extreme ocean atmospheric environment on the surface of an enveloping naval vessel and the surface of ocean service equipment, the utility model provides a broad-spectrum salt mist artificial simulation system, a double-order saturation barrel is adopted to progressively adjust the airflow temperature within the range of (room temperature + 5 DEG C)-90 DEG C, and a first-order saturation barrel enables airflow and heated pure water to be mixed to generate first-order hot airflow; then conveying to a second-order saturation barrel to be mixed with heated saline water to generate second-order hot air flow, finally mixing the second-order hot air flow with a saline solution with the pH value of 2.0-7.0, and atomizing through a nozzle to generate neutral or acidic broad-spectrum salt mist with the temperature of (room temperature + 5 DEG C)-90 DEG C.

Description

Technical Field

[0001] The utility model relates to an instrument and equipment, in particular to a salt spray system. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Salt spray is a common marine atmosphere distributed from the sea surface to two thousand meters above the ground. It is formed by a large number of tiny salt droplets (or salt cores) generated when the cavitation bubbles contained in the violently moving seawater on the surface burst and diffusely distributed with the rising airflow. On the one hand, with global warming and rising temperatures, the temperature of the marine atmosphere is on the rise. On the other hand, solar radiation, ultraviolet radiation, etc. cause the surface of the equipment structure to heat up sharply, which can reach 70℃-90℃ locally. Through heat conduction, the temperature of the salt cores deposited on the surface increases. Furthermore, the marine atmosphere near industrial areas (such as the Bohai Rim area) is mostly acidic. What's worse, conventional-powered aircraft carriers emit a large amount of combustion exhaust gas SOx and NOx, making the marine atmosphere on the ship surface highly acidic. These natural environmental factors, coupled with regional characteristics and equipment service conditions, result in the salt spray temperature acting on the equipment being much higher than the climate temperature and tending to be acidic.

[0004] At present, the artificial simulation salt spray system device is limited to meeting the 35℃ and 50℃ salt spray test requirements, and cannot cover extreme salt spray phenomena. Simply extending the time cannot accelerate the test. These have caused the correlation deviation between the salt spray test results and the actual service status of the equipment structure. It is necessary to build a new generation of salt spray system. Utility Model Content

[0005] In order to artificially simulate the extreme marine atmospheric salt spray environment surrounding the ship deck and equipment surface and build a new generation of salt spray system, the utility model provides a broad-spectrum salt spray artificial simulation system, and the technical solution is as follows:

[0006] The broad-spectrum salt spray artificial simulation system comprises a first-order saturation barrel, a second-order saturation barrel, a nozzle, a salt spray chamber, a peristaltic pump and an air compressor, wherein the air compressor is connected to the first-order saturation barrel, the first-order saturation barrel is connected to the second-order saturation barrel, the second-order saturation barrel is connected to the nozzle, and the nozzle is connected to the peristaltic pump, and the nozzle is fastened inside the salt spray chamber.

[0007] The first-order saturation barrel heats the pure water uniformly, and the airflow at a certain pressure delivered by the air compressor reaches the first-order temperature after heat exchange with the pure water, and the generated first-order hot airflow is delivered to the second-order saturation barrel.

[0008] The second-order saturated barrel heats the brine uniformly, and the first-order hot air flow reaches the second-order temperature after heat exchange with the brine, and the generated second-order hot air flow is transported to the nozzle; wherein the inner wall of the second-order saturated barrel has corrosion resistance against boiling brine at 115°C under 0.2MPa pressure.

[0009] The nozzle mixes the second-order hot air flow and a salt solution of a certain pH value delivered by a peristaltic pump, and forms a neutral or acidic salt mist with a second-order temperature through atomization, which is dispersed in the salt spray chamber; wherein the nozzle has corrosion resistance to 90°C acidic salt mist and corrosion resistance to 115°C boiling salt water under 0.2MPa pressure.

[0010] The inner wall of the salt spray box has corrosion resistance against 90° C. acid salt spray.

[0011] The peristaltic pump is used to transport a salt solution with a certain pH value to the nozzle, and the amount of salt mist deposition in the salt spray chamber is controlled by setting the flow rate.

[0012] The air compressor is used to generate an airflow with a certain pressure and a certain flow rate, and deliver it to the first-order saturation barrel; wherein the airflow pressure does not exceed 0.2MPa.

[0013] Optionally, the chemical composition and concentration of the salt contained in the brine and the salt solution are the same and can be prepared; the pH value of the brine and the salt solution is 2.0-7.0, and the acidity and alkalinity of the salt mist are adjusted by preparing salt solutions with different pH values.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The salt spray system of the utility model has a double-stage saturation barrel structure, which realizes the progressive adjustment of the air flow temperature. Since the first-stage saturation barrel heats pure water at a relatively low temperature, the air compressor is prevented from being corroded by salt water and high temperature, which is beneficial to the long-term operation of the salt spray system in simulating extreme marine atmosphere.

[0016] 2. The salt spray system of the utility model has a second-order saturated barrel and nozzle that can resist corrosion from boiling salt water at 115°C under an air pressure of 0.2MPa, and a salt spray chamber that can resist corrosion from acidic salt spray at 90°C. It can adjust the salt spray temperature within the range of (room temperature + 5°C) to 90°C through hot air flow, and can adjust the acidity and alkalinity of the salt spray by the pH value of the salt solution, thereby achieving artificial simulation of a broad-spectrum salt spray of extreme marine atmosphere surrounding the ship's deck and equipment surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0018] Figure 1 This is a schematic diagram of the broad-spectrum salt spray artificial simulation system;

[0019] Among them, 1-first-order saturation barrel, 2-second-order saturation barrel, 3-nozzle, 4-salt spray chamber, 5-peristaltic pump, 6-air compressor. DETAILED DESCRIPTION

[0020] Example

[0021] The present embodiment provides a broad-spectrum salt spray artificial simulation system. As shown in the figure, by adjusting the first-order and second-order hot air flow temperatures and the pH value of the salt solution, a neutral or acidic broad-spectrum salt spray of (room temperature + 5°C) to 90°C can be generated; preferably, the salt solution is a 5% NaCl solution with a pH value of 2.0 to 7.0 prepared from NaCl solid and concentrated sulfuric acid; in the present embodiment, the salt water and the salt solution are the same.

[0022] The broad-spectrum salt spray artificial simulation system comprises a first-order saturation barrel 1, a second-order saturation barrel 2, a nozzle 3, a salt spray box 4, a peristaltic pump 5 and an air compressor 6, wherein the air compressor 6 is connected to the first-order saturation barrel 1, the first-order saturation barrel 1 is connected to the second-order saturation barrel 2, the second-order saturation barrel 2 is connected to the nozzle 3, and the nozzle 3 is connected to the peristaltic pump 5; preferably, the nozzle 3 is fastened to the bottom of the salt spray box 4.

[0023] The first-order saturation barrel 1 heats the pure water uniformly, and the airflow with a pressure of 0.2 MPa delivered by the air compressor 6 reaches the first-order temperature after heat exchange with the pure water, and the generated first-order hot air flow is delivered to the second-order saturation barrel 2; preferably, the first-order temperature is room temperature to 40°C, and the first-order temperature is set to adjust the pure water temperature and the first-order hot air flow temperature.

[0024] The second-order saturation barrel 2 uniformly heats a 5% NaCl solution with a pH value of 2.0 to 7.0, and the first-order hot air flow reaches the second-order temperature after heat exchange with the 5% NaCl solution with a pH value of 2.0 to 7.0, and the generated second-order hot air flow is transported to the nozzle 3; wherein,

[0025] The inner wall of the second-stage saturation barrel 2 has corrosion resistance against a 5% NaCl boiling solution with a pH value of 2.0 under a gas pressure of 0.2 MPa. Preferably, the inner wall material of the second-stage saturation barrel 2 is polyvinylidene chloride; the second-stage temperature is (room temperature + 5°C) to 90°C, and the second-stage temperature is set to adjust the temperature of the 5% NaCl solution with a pH value of 2.0 to 7.0 and the second-stage hot air flow temperature.

[0026] The nozzle 3 mixes the second-order hot air flow and the 5% NaCl solution with a pH value of 2.0 to 7.0 delivered by the peristaltic pump 5, and forms a neutral or acidic NaCl salt mist with a second-order temperature through atomization, which is dispersed in the salt spray chamber 4; wherein the nozzle 3 has corrosion resistance to 90°C acidic NaCl salt mist and corrosion resistance to 5% NaCl boiling solution with a pH value of 2.0 under a pressure of 0.2MPa. Preferably, the material of the nozzle 3 is polyvinylidene chloride.

[0027] The inner wall of the salt spray box 4 has corrosion resistance against 90° C. acidic NaCl salt spray. Preferably, the inner wall material of the salt spray box 4 is polyvinylidene chloride.

[0028] The peristaltic pump 5 is used to deliver a 5% NaCl solution with a pH value of 2.0 to 7.0 to the nozzle 3, and the salt spray deposition in the salt spray box 4 is controlled to be 1 to 2 mL / (80 cm 2 h).

[0029] The air compressor 6 is used to generate an airflow with a certain pressure and a certain flow rate, and deliver it to the first-order saturation barrel 1; wherein the airflow pressure does not exceed 0.2 MPa.

[0030] The pH value of the 5% NaCl solution is 2.0-7.0. 5% NaCl solutions with different pH values ​​can be prepared by adding concentrated sulfuric acid of different mass fractions, thereby adjusting the acidity and alkalinity of the NaCl salt mist.

[0031] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A broad-spectrum salt spray artificial simulation system, characterized in that: By adjusting the temperature of the first-order and second-order hot air flows and the pH value of the salt solution, a neutral or acidic broad-spectrum salt mist at room temperature +5°C to 90°C can be generated; the broad-spectrum salt mist artificial simulation system comprises a first-order saturation barrel, a second-order saturation barrel, a nozzle and a salt spray chamber, wherein the first-order saturation barrel is connected to the second-order saturation barrel, the second-order saturation barrel is connected to the nozzle, and the nozzle is fastened inside the salt spray chamber.

2. The broad-spectrum salt spray artificial simulation system as claimed in claim 1, characterized in that: The first-order saturation barrel heats the pure water uniformly, and the airflow with a certain air pressure delivered reaches the first-order temperature after heat exchange with the pure water. The generated first-order hot airflow is delivered to the connected second-order saturation barrel.

3. The broad-spectrum salt spray artificial simulation system as claimed in claim 1, characterized in that, The second-order saturation barrel heats the brine uniformly, and the first-order hot air flow delivered by the first-order saturation barrel reaches the second-order temperature after heat exchange with the brine, and the generated second-order hot air flow is delivered to the connected nozzle; wherein, the inner wall of the second-order saturation barrel has corrosion resistance against boiling brine at 115°C under a pressure of 0.2MPa.

4. The broad-spectrum salt spray artificial simulation system as claimed in claim 1, characterized in that: The nozzle mixes the second-order hot air flow delivered by the second-order saturation barrel with the salt solution of a certain pH value delivered, and forms a neutral or acidic salt mist with a second-order temperature through atomization, which is dispersed in the salt spray chamber; wherein the nozzle has corrosion resistance to 90°C acidic salt mist and corrosion resistance to 115°C boiling salt water under 0.2MPa pressure.

5. The broad-spectrum salt spray artificial simulation system as claimed in claim 1, characterized in that: The inner wall of the salt spray box has corrosion resistance against 90° C. acid salt spray.

6. The broad-spectrum salt spray artificial simulation system as claimed in claim 1, characterized in that: It also includes a peristaltic pump connected to the nozzle and used for conveying a salt solution with a certain pH value to the nozzle. The amount of salt mist deposition in the salt spray box can be controlled by setting the flow rate.

7. The broad-spectrum salt spray artificial simulation system as claimed in claim 1, characterized in that: It also includes an air compressor connected to the first-order saturation barrel, which is used to generate an airflow with a certain pressure and a certain flow rate, and transport it to the first-order saturation barrel; wherein the airflow pressure does not exceed 0.2MPa.

8. The broad-spectrum salt spray artificial simulation system as claimed in claim 1, characterized in that: The chemical composition and concentration of salt contained in brine and salt solution are the same and can be prepared; the pH value of brine and salt solution is the same, and the pH value ranges from 2.0 to 7.

0. The acidity and alkalinity of salt spray can be adjusted by preparing salt solutions with different pH values.

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