Spraying automatic control device for rust inhibitor salt spray corrosion test

Abstract

The utility model discloses an automatic spray control device for an antirust agent salt spray corrosion test, which comprises a salt spray test box, a compressed air spray pipe is connected with an air compressor outside the salt spray test box through an air delivery pipe, and the water inlet end of a salt water spray pipe is connected with a salt water delivery pipe extending into a salt water tank. An electric throttle valve located outside the salt spray test box is installed on the air conveying pipe, an online flow meter located outside the salt spray test box is installed on the saline water conveying pipe, the online flow meter is in signal connection with the controller, and the controller is in signal connection with the electric throttle valve. An electric throttle valve and an online flow meter are arranged on an air conveying pipe and a brine conveying pipe, the flow of the brine conveying pipe is changed due to the change of the liquid level height in a brine tank, the online flow meter monitors the brine flow and feeds back the brine flow to a controller, and the controller drives the electric throttle valve to increase or decrease the opening degree, adjusts the brine spraying amount and finally tends to be stable. Multiple times of manual spraying amount adjustment and multiple times of repeated tests are not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of salt spray testing, in particular to a spray automatic control device for rust preventive salt spray corrosion testing. Background Art

[0002] In the petrochemical industry, there are certain requirements for the anti-rust performance of anti-rust grease. The salt spray test chamber can be used to test its anti-rust performance. The salt spray test method has certain requirements for various data and must comply with the petrochemical industry standard SH / T 0081 of the People's Republic of China, including the requirements for spray volume. The liquid volume of the salt spray precipitation liquid needs to be controlled to be maintained at 1.0-2.0mL / h*80cm 2 .

[0003] During the test, a funnel is usually set up in the test chamber to collect the sedimentation liquid and transport it to a metering bucket to determine the sedimentation amount. Finally, the spray volume is calculated based on the volume of brine in the metering bucket. When the result does not meet the requirements, the air pressure valve needs to be manually adjusted, and the spray volume is adjusted by changing the nozzle air pressure. The test is repeated until it meets the requirements. The test data is valid.

[0004] However, during the test, as the brine is used, the brine level in the brine tank drops. When it drops to a certain level, the float valve opens, the brine tank replenishes the brine tank, the brine level rises, and the float valve closes, and this cycle repeats. Fluctuating brine tank levels cause underwater pressure fluctuations, ultimately causing the spray volume to fluctuate as well. To ensure the spray volume meets the requirements, the air pressure valve must be adjusted multiple times. Salt spray testing itself is time-consuming, and multiple experiments consume both labor and time, creating drawbacks. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model provides a spray automatic control device for rust inhibitor salt spray corrosion test, which is used to solve the problem that the spray amount of the existing rust inhibitor salt spray corrosion test is difficult to control, resulting in a large amount of manpower and time costs.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A spray automatic control device for a salt spray corrosion test of a rust preventive agent comprises a salt spray test chamber, a chamber cover movably mounted on the top of the salt spray test chamber, a salt water tank disposed at the bottom of the salt spray test chamber, a salt water tank disposed outside the salt spray test chamber, a water supply pipe connected to a float valve disposed in the salt water tank disposed at the bottom of the salt water tank, a cover plate mounted on the top of the salt water tank, a spray tower fixedly connected to the upper surface of the cover plate, a compressed air nozzle and an L-shaped salt water nozzle vertically mounted inside the spray tower, the water outlet end of the nozzle facing the air outlet end of the compressed air nozzle;

[0008] The compressed air nozzle is connected to the air compressor outside the salt spray test chamber through an air delivery pipe. The water inlet end of the salt water nozzle is connected to the salt water delivery pipe extending into the inside of the salt water tank. The air delivery pipe is installed with an electric throttle valve located outside the salt spray test chamber. The salt water delivery pipe is installed with an online flow meter located outside the salt spray test chamber. The online flow meter is connected to the controller signal, and the controller is connected to the electric throttle valve signal.

[0009] Preferably, the float valve is located at a middle height position inside the brine tank, and the input end of the brine delivery pipe is located near the bottom inside the brine tank.

[0010] Preferably, the line flow meter is fixed on the outer wall of the salt spray test chamber, and the brine delivery pipe is bent and arranged close to the inner wall of the salt spray test chamber and connected to the inlet and outlet of the line flow meter.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The utility model arranges an electric throttle valve and an online flow meter on the air delivery pipe and the brine delivery pipe. Changes in the liquid level in the brine tank cause changes in the flow rate in the brine delivery pipe. The online flow meter monitors the brine flow rate and feeds back the feedback to the controller. The controller drives the electric throttle valve to increase or decrease the opening, and adjusts the brine spray amount so that it eventually tends to be stable, avoiding the problem that the spray amount is affected by changes in the brine liquid level in the brine tank. There is no need to manually adjust the spray amount and repeat the test many times, so the purpose of simplicity and efficiency is achieved, and the problem that the spray amount of the existing rust inhibitor salt spray corrosion test is difficult to control, resulting in a large amount of manpower cost and time cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is the principle diagram of the utility model system.

[0015] In the figure: 1. Salt spray test chamber; 2. Chamber cover; 3. Brine tank; 4. Brine tank; 5. Float valve; 6. Water supply pipe; 7. Cover plate; 8. Spray tower; 9. Compressed air nozzle; 10. Brine nozzle; 11. Air delivery pipe; 12. Brine delivery pipe; 13. Electric throttle valve; 14. Online flow meter; 15. Controller. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] like Figure 1-2 As shown, the utility model provides a technical solution: a spray automatic control device for a rust preventive salt spray corrosion test, comprising a salt spray test chamber 1, a chamber cover 2 movably mounted on the top of the salt spray test chamber 1, a salt water tank 3 disposed at the bottom of the salt spray test chamber 1, a salt water tank 4 disposed outside the salt spray test chamber 1, a water supply pipe 6 connected to a float valve 5 disposed in the salt water tank 3, and ...

[0018] The float valve 5 is located at a middle height inside the brine tank 3. A cover plate 7 is installed on the top of the brine tank 3. A spray tower 8 is fixedly connected to the upper surface of the cover plate 7. A compressed air nozzle 9 and an L-shaped brine nozzle 10 are vertically installed inside the spray tower 8, with the water outlet facing the air outlet of the compressed air nozzle 9.

[0019] The compressed air nozzle 9 is connected to the air compressor outside the salt spray test chamber 1 through the air delivery pipe 11. The water inlet end of the salt water nozzle 10 is connected to the salt water delivery pipe 12 extending into the salt water tank 3. The input end of the salt water delivery pipe 12 is located near the bottom of the salt water tank 3. The air delivery pipe 11 is installed with an electric throttle valve 13 located outside the salt spray test chamber 1.

[0020] An online flow meter 14 located outside the salt spray test chamber 1 is installed on the brine delivery pipe 12. The online flow meter 14 is fixed on the outer wall of the salt spray test chamber 1. The brine delivery pipe 12 is bent and arranged near the inner wall of the salt spray test chamber 1 and is connected to the inlet and outlet of the online flow meter 14. The online flow meter 14 is connected to the controller 15 for signal communication, and the controller 15 is connected to the electric throttle valve 13 for signal communication.

[0021] Working principle:

[0022] When the liquid level in the brine tank 3 is low, the float valve 5 opens, and the brine tank 4 replenishes brine into the brine tank 3 through the water supply pipe 6. When the liquid level reaches the height of the float valve 5, the float valve 5 closes and stops replenishing brine. The air compressor sprays compressed air upward in the spray tower 8 through the air delivery pipe 11 and the compressed air nozzle 9. The high-speed air flow creates a negative pressure at the water outlet of the brine nozzle 10. The brine is output from the brine tank 3 through the brine delivery pipe 12 and the brine nozzle 10 and is impacted by the compressed air to produce salt mist.

[0023] As the liquid level in the brine tank 3 drops, the pressure at the input end of the brine delivery pipe 12 decreases, and the brine flow rate in the brine delivery pipe 12 decreases. The online flow meter 14 monitors the brine flow rate drop and feeds back to the controller 15. The controller 15 drives the electric throttle valve 13 to increase the opening, increase the air flow, and increase the negative pressure at the water outlet end of the brine nozzle 10, thereby increasing the brine flow rate.

[0024] The brine replenishment liquid level in the brine tank 3 rises, the pressure at the input end of the brine delivery pipe 12 rises, and the brine flow rate in the brine delivery pipe 12 rises. The online flow meter 14 monitors the rise in brine flow rate and feeds back to the controller 15. The controller 15 drives the electric throttle valve 13 to reduce the opening, reduce the air flow rate, reduce the negative pressure at the water outlet end of the brine nozzle 10, reduce the brine flow rate, and finally stabilize the brine spray amount by automatically adjusting the air flow rate.

[0025] It should be noted that, in this document, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spray automatic control device for a rust preventive salt spray corrosion test, comprising a salt spray test chamber (1), wherein a chamber cover (2) is movably mounted on the top of the salt spray test chamber (1), and characterized in that: A salt water tank (3) is provided at the bottom of the salt spray test box (1), a salt water tank (4) is provided outside the salt spray test box (1), a water supply pipe (6) connected to a float valve (5) provided in the salt water tank (3) is installed at the bottom of the salt water tank (4), a cover plate (7) is installed on the top of the salt water tank (3), a spray tower (8) is fixedly connected to the upper surface of the cover plate (7), and a compressed air nozzle (9) and an L-shaped salt water nozzle (10) with a water outlet facing the air outlet of the compressed air nozzle (9) are vertically installed inside the spray tower (8); The compressed air nozzle (9) is connected to an air compressor outside the salt spray test chamber (1) through an air delivery pipe (11); the water inlet end of the salt water nozzle (10) is connected to a salt water delivery pipe (12) extending to the inside of the salt water tank (3); the air delivery pipe (11) is installed with an electric throttle valve (13) located outside the salt spray test chamber (1); the salt water delivery pipe (12) is installed with an online flow meter (14) located outside the salt spray test chamber (1); the online flow meter (14) is connected to a controller (15) for signal communication; and the controller (15) is connected to the electric throttle valve (13) for signal communication.

2. The automatic spray control device for rust preventive salt spray corrosion test according to claim 1, characterized in that: The float valve (5) is located at a middle height position inside the brine tank (3), and the input end of the brine delivery pipe (12) is located near the bottom of the brine tank (3).

3. The automatic spray control device for rust preventive salt spray corrosion test according to claim 1, characterized in that: The line flow meter (14) is fixed on the outer wall of the salt spray test chamber (1), and the salt water delivery pipe (12) is bent and arranged close to the inner wall of the salt spray test chamber (1) and connected to the inlet and outlet of the line flow meter (14).

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