Airtight test device for oil tanker cargo oil tank coating

Abstract

The utility model relates to an airtight test device for a coating of a cargo oil tank of an oil tanker, which is applied to the technical field of oil tanker detection equipment, and realizes that after mixed gas enters a test module through a gas inlet and a corresponding airtight test is carried out, residual tail gas in the test module is discharged from a gas outlet and is discharged into a tail gas treatment module through a connecting pipe; when tail gas enters the tail gas treatment module and then passes through the filter screen upwards from the bottom, particulate matter in the tail gas can be filtered, after the filtered tail gas is subjected to adsorption treatment, treated harmless gas is discharged from the exhaust port, and when the filter screen is used for filtering the tail gas, the harmful gas is discharged from the exhaust port. The electric sliding rail is started through the controller to drive the scraping brush to clean the filter screen, the scraping brush is made of soft and fine materials, particles blocked in meshes can be scraped to the position below the filter screen when the filter screen is scraped, and when activated carbon is in a saturated state, the activated carbon can be extracted out of the tail gas treatment module to be replaced.

Description

Technical Field

[0001] This utility model relates to an airtightness testing device, and in particular to an airtightness testing device for the coating of oil tanker cargo oil tanks, which is applied in the field of oil tanker testing equipment technology. Background Technology

[0002] The integrity and airtightness of the coating of oil tankers are crucial to the safe operation of oil tankers. The oil tanks are filled with various oil products for a long time. If the coating is defective and the airtightness is poor, it will not only cause oil leakage and environmental pollution, but may also cause serious safety accidents.

[0003] Chinese patent CN103383339A discloses an airtightness testing device for the coating of cargo oil tanker of crude oil tanker. This device can be used to determine the adaptability of the protective coating of cargo oil tanker of crude oil tanker in a corrosive environment, thereby providing a dynamic and scientific accelerated method for quality prediction, evaluation and qualification of the protective coating of cargo oil tanker of crude oil tanker.

[0004] In the aforementioned comparative document, a mixed gas is created using gases such as H2S, SO2, CO2, and N2, and then fed into a quantitative gas supply system in the atmospheric corrosion condensation test chamber. After the test, some of the exhaust gas with poor water solubility needs to be filtered to avoid environmental pollution. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is to create a mixed gas such as H2S, SO2, CO2 and N2, and to input it into the quantitative gas supply system in the atmospheric corrosion condensation test chamber. After the test, it is necessary to filter some of the exhaust gas with poor water solubility.

[0006] To address the aforementioned problems, this utility model provides an airtightness testing device for the coating of cargo oil tankers, comprising a sampling module and an experimental module with an air inlet and an air outlet, and an exhaust gas treatment module. The exhaust gas treatment module is connected to the air outlet of the experimental module via a connecting pipe. A replacement port is provided on the side of the air outlet, and a first sealing cap is connected to the replacement port by screws. A sliding groove is symmetrically fixedly connected to the upper part of the inner wall of the exhaust gas treatment module. A fixed bed corresponding to the replacement port is slidably connected to the sliding groove via a slider. Activated carbon is placed in the fixed bed, and a mesh cover is snapped onto the inner wall of the fixed bed at the top of the activated carbon. A filter screen is connected to the inner wall of the exhaust gas treatment module below the sliding groove. An electric sliding rail is symmetrically fixedly connected to the inner wall of the exhaust gas treatment module below the filter screen. A scraper is slidably connected to the electric sliding rail, and the scraper contacts the filter screen. An exhaust port is provided at the top of the exhaust gas treatment module.

[0007] In the aforementioned exhaust gas treatment module, the exhaust gas first passes through a filter screen to remove impurities, and then is purified by activated carbon before being discharged. This extends the service life of the activated carbon, and the scraper helps keep the filter screen clear.

[0008] As a further improvement of this application, a recovery port is provided on the side end of the exhaust gas treatment module below the replacement port, and a drawer is provided inside the recovery port below the filter screen. A second sealing cover is connected to the inner wall of the recovery port by screws.

[0009] As a further improvement to this application, sealing rings are provided on the contact surfaces of the first sealing cover and the replacement port, and the second sealing cover and the recycling port.

[0010] As a further improvement of this application, a dehydration device is threadedly connected to the end of the air inlet away from the experimental module, and an air inlet pipe is opened at the end of the dehydration device away from the air inlet.

[0011] As another improvement of this application, the inner wall of the dehydration device is fitted with a disc with several holes, and the holes are filled with molecular sieves.

[0012] As a further improvement to this application, the scraper is made of a soft, fine material, and a controller for controlling the electric slide rail is fixedly connected to the experimental module.

[0013] In summary, after the mixed gas enters the test module through the inlet and undergoes the corresponding airtightness test, the residual exhaust gas in the test module is discharged from the outlet and discharged into the exhaust gas treatment module through the connecting pipe. When the exhaust gas enters the exhaust gas treatment module and passes through the filter screen from bottom to top, the particulate matter in the exhaust gas can be filtered. After the filtered exhaust gas is treated by activated carbon adsorption, the harmless gas after treatment will be discharged from the exhaust port. At the same time as the filter screen filters the exhaust gas, the controller activates the electric slide rail to drive the scraper to clean the filter screen. The scraper is made of soft and fine material. When scraping the filter screen, the particles blocking the mesh can be scraped off and fall below the filter screen. When the activated carbon is saturated, the first sealing cover can be opened and the fixed bed containing activated carbon can be pulled out from the exhaust gas treatment module for replacement. Attached Figure Description

[0014] Figure 1 This is an isometric view of the coating airtightness testing device according to the first embodiment of this application;

[0015] Figure 2 Areometric views of the exhaust gas treatment module according to the first and second embodiments of this application;

[0016] Figure 3 This is a schematic diagram of the internal structure of the exhaust gas treatment module according to the first and second embodiments of this application;

[0017] Figure 4 For this application Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This is a schematic diagram of the scraper structure according to the first embodiment of this application;

[0019] Figure 6 This is a schematic diagram of activated carbon according to the first embodiment of this application;

[0020] Figure 7 This is a schematic diagram of the installation of the dehydration equipment according to the second embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1. Experimental module; 2. Air outlet; 3. Connecting pipe; 4. Exhaust gas treatment module; 5. Exhaust port; 6. First sealing cover; 7. Second sealing cover; 8. Dehydration equipment; 9. Replacement port; 10. Recovery port; 11. Fixed bed; 12. Slide chute; 13. Filter screen; 14. Scraper; 15. Drawer; 16. Electric slide rail; 17. Air inlet pipe; 18. Slider; 20. Mesh cover; 21. Activated carbon; 22. Air inlet. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figures 1-6 This invention discloses an airtightness testing device for the coating of a cargo oil tanker, comprising a sampling module and an experimental module 1 with an air inlet 22 and an air outlet 2, and an exhaust gas treatment module 4. The exhaust gas treatment module 4 is connected to the air outlet 2 of the experimental module 1 via a connecting pipe 3. A replacement port 9 is provided on the side of the air outlet 2, and a first sealing cap 6 is connected to the replacement port 9 by screws. Slide grooves 12 are symmetrically fixedly connected to the upper part of the inner wall of the exhaust gas treatment module 4. A fixed bed 11 corresponding to the replacement port 9 is slidably connected to the slide grooves 12 via a slider 18. Activated carbon 21 is placed on the top of the activated carbon 21, and a mesh cover 20 is snapped onto the inner wall of the fixed bed 11. A filter screen 13 is connected to the inner wall of the exhaust gas treatment module 4 below the slide 12. An electric slide rail 16 is symmetrically fixed to the inner wall of the exhaust gas treatment module 4 below the filter screen 13. A scraper 14 is slidably connected to the electric slide rail 16 and contacts the filter screen 13. An exhaust port 5 is opened at the top of the exhaust gas treatment module 4. The scraper 14 is made of soft and fine material. A controller for controlling the electric slide rail 16 is fixedly connected to the experimental module 1.

[0026] Working principle: When the mixed gas enters the test module through the inlet 22 and undergoes the corresponding airtightness test, the residual exhaust gas in the test module is discharged from the outlet 2 and discharged into the exhaust gas treatment module 4 through the connecting pipe 3. When the exhaust gas enters the exhaust gas treatment module 4 and passes through the filter screen 13 from the bottom up, the particulate matter in the exhaust gas can be filtered. After the filtered exhaust gas is adsorbed by activated carbon 21, the harmless gas after treatment will be discharged from the exhaust port 5. At the same time as the filter screen 13 filters the exhaust gas, the controller opens the electric slide rail 16 to drive the scraper 14 to clean the filter screen 13. The scraper 14 is made of soft and fine material. When scraping the filter screen 13, the particles blocked in the mesh can be scraped off and fall below the filter screen 13. When the activated carbon 21 is saturated, the first sealing cover 6 can be opened and the fixed bed 11 containing the activated carbon 21 can be pulled out from the exhaust gas treatment module 4 for replacement.

[0027] The exhaust gas enters the exhaust gas treatment module 4 and first passes through the filter screen 13 to filter out the mixed particles. Then it is purified by activated carbon 21 before being discharged, which can extend the service life of activated carbon 21. At the same time, the scraper 14 can keep the filter screen 13 unobstructed.

[0028] Second implementation method:

[0029] Figures 2-3 and Figure 7 The exhaust gas treatment module 4 has a recovery port 10 located below the replacement port 9 on its side. Inside the recovery port 10, there is a drawer 15 located below the filter screen 13. The inner wall of the recovery port 10 is connected to a second sealing cover 7 by screws. The contact surfaces of the first sealing cover 6 and the replacement port 9, and the second sealing cover 7 and the recovery port 10 are all provided with sealing rings. The end of the air inlet 22 away from the experimental module 1 is threadedly connected to a dehydration device 8. The end of the dehydration device 8 away from the air inlet 22 has an air inlet pipe 17. The inner wall of the dehydration device 8 is fitted with a disc with several holes, and the holes are filled with molecular sieves.

[0030] Working principle: After the gas enters the dehydration device 8 through the inlet pipe 17 and is dehydrated by the molecular sieve, the gas enters the experimental module 1 through the inlet 22. Then the exhaust gas is discharged from the outlet 2 and enters the exhaust gas treatment module 4 through the connecting pipe 3. After being filtered by the filter screen 13, the particles adhering to the scraper 14 are cleaned by the filter screen 13 and fall into the drawer 15 for collection. When the experimental device is not in use, the second sealing cover 7 can be opened and the drawer 15 can be pulled out from the exhaust gas treatment module 4 to process the collected particles.

[0031] A dehydration device 8 with an internal molecular sieve is installed at the air inlet 22 so that the gas is dehydrated before entering the experimental module 1, avoiding contact between water and the coating inside the experimental module 1, thereby extending the service life of the coating. In addition, a drawer 15 is designed to collect the cleaned particles for convenient subsequent processing.

[0032] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A device for testing the gas tightness of a coating of a cargo tank of a tanker, comprising a sampling module and an experimental module (1) with an inlet (22) and an outlet (2) for gas, characterized in that: Also include tail gas treatment module (4), the tail gas treatment module (4) in with the experiment module (1) between the gas outlet (2) is connected through the connecting pipe (3) communication, the gas outlet (2) side end is provided with replacement mouth (9), the replacement mouth (9) is connected with the first sealing cover (6) through screw, the tail gas treatment module (4) inner wall upper portion is fixedly connected with the sliding groove (12) symmetrically, the sliding groove (12) is slidably connected with the fixed bed (11) corresponding to the replacement mouth (9) through the sliding block (18), the fixed bed (11) is placed with activated carbon (21), and the fixed bed (11) is located in the activated carbon (21) top inner wall and is connected with the net cover (20), the tail gas treatment module (4) inner wall is connected with the filter screen (13) below the sliding groove (12), the tail gas treatment module (4) inner wall is fixedly connected with the electric sliding rail (16) below the filter screen (13) symmetrically, the electric sliding rail (16) is slidably connected with the scraper (14), and the scraper (14) is in contact with the filter screen (13), the tail gas treatment module (4) top end is provided with exhaust port (5).

2. A gas tight test apparatus for coating of cargo tanks of a tanker according to claim 1, characterized in that: The tail gas treatment module (4) side end is provided with recovery port (10) below the replacement mouth (9), the recovery port (10) is provided with drawer (15) below the filter screen (13), the recovery port (10) inner wall is connected with the second sealing cover (7) through screw.

3. A gas tight test apparatus for coating of cargo tanks of a tanker according to claim 2, characterized in that: The contact surface of the first sealing cover (6) and the replacement mouth (9), the second sealing cover (7) and the recovery port (10) are all provided with sealing rings.

4. A gas tight test apparatus for coating of cargo tanks of a tanker according to claim 1, characterized in that: The air inlet (22) is threadedly connected with the dewatering equipment (8) away from the experiment module (1), and the dewatering equipment (8) is provided with an air inlet pipe (17) away from the air inlet (22).

5. A gas tight test apparatus for coating of cargo tanks of a tanker according to claim 4, characterized in that: The inner wall of the dewatering equipment (8) is provided with a plurality of holes, and the holes are filled with molecular sieve.

6. A gas tight test apparatus for coating of cargo tanks of a tanker according to claim 1, characterized in that: The scraper (14) is made of soft and small material, and the experiment module (1) is fixedly connected with a controller for controlling the electric sliding rail (16).

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