Device for detecting oil gas concentration of gas escaped from cargo tank of oil tanker

Abstract

The invention provides an oil tanker liquid cargo tank escaping gas oil gas concentration detection device, and belongs to the technical field of gas detection.The oil tanker liquid cargo tank escaping gas oil gas concentration detection device comprises a shell and a replacement mechanism, a gas outlet pipe is fixedly arranged at the top of the shell, a gas inlet pipe is fixedly arranged at the bottom of the shell, and a connecting pipe is arranged at the bottom of the gas outlet pipe in a communicating mode; a gas detector is fixedly mounted between the gas outlet pipe and the connecting pipe, and a gas pump is fixedly mounted in the gas inlet pipe; a filter box is inserted between the air inlet pipe and the connecting pipe in a transmission mode through a replacement mechanism, a filter screen is fixedly arranged in the filter box, and the air inlet pipe and the connecting pipe are communicated through insertion of the filter box. A movable plate is arranged in the connecting pipe in a limiting sliding mode in the length direction of the connecting pipe, a distance sensor is fixedly arranged, a plurality of through holes are formed in the movable plate, and the distance sensor is used for detecting the distance of the movable plate relative to the connecting pipe. After the air pump is started, the distance between the movable plate and the distance sensor can be detected through the distance sensor, and therefore the blocking degree of the filter screen is judged.

Description

Technical Field

[0001] The invention belongs to the technical field of gas detection, and in particular relates to a device for detecting the oil and gas concentration of gas escaping from a liquid cargo tank of an oil tanker. Background Art

[0002] An oil tanker refers to a "ship" that carries oil and oil products (such as diesel, gasoline and heavy oil). Oil and gas concentration detection is a key measure to ensure the safe operation of oil tankers. When the oil and gas concentration exceeds the lower explosion limit, there is a risk of explosion, so the oil and gas concentration needs to be detected.

[0003] The existing patent with announcement number CN222379670U relates to a novel gas detection device, which is provided with a filter box, a motor, a screw, a movable plate, a box body, a second through hole, a storage tube, a spring, a first through hole, etc. When the filter box needs to be replaced, the motor is started, and the screw is driven to rotate through the output shaft of the motor, thereby driving the movable plate to move to the left, so that the used filter box extends out of the box body and automatically falls off. Subsequently, the movable plate is controlled to move to the right and retract into the box body, so that the second through hole is aligned with the lower end of the storage tube. Under the action of the spring, the filter box in the storage tube falls into the second through hole, and the movable plate moves to the left again, so that the second through hole is aligned with the first through hole, thereby realizing the automatic replacement and installation of the filter box.

[0004] The above scheme can reduce the tediousness of manual replacement of the filter box by automatically replacing and installing the filter box, thereby improving the convenience of using the device. However, the above scheme cannot understand the degree of blockage of the filter box, resulting in the operator being unable to judge when the filter needs to be replaced. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention provides a device for detecting the oil and gas concentration of escaping gas from a liquid cargo tank of an oil tanker.

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

[0007] A device for detecting the concentration of oil and gas escaping from a liquid cargo tank of an oil tanker comprises a shell and a replacement mechanism, wherein an air outlet pipe is fixedly arranged on the top of the shell, an air inlet pipe is fixedly arranged on the bottom of the shell, a connecting pipe is arranged at the bottom of the air outlet pipe, a gas detector is fixedly installed between the air outlet pipe and the connecting pipe, and an air pump is fixedly installed in the air inlet pipe; a filter box is inserted between the air inlet pipe and the connecting pipe through the transmission of the replacement mechanism, a filter screen is fixedly arranged in the filter box, and communication between the air inlet pipe and the connecting pipe is achieved through the insertion of the filter box; a movable plate is provided in the connecting pipe for limited sliding along its own length direction, and a distance sensor is fixedly arranged, a plurality of through holes are provided on the movable plate, and the distance sensor is used to detect the distance of the movable plate relative to itself.

[0008] Further, the replacement mechanism includes a motor. The motor is fixedly installed on the inner wall of the top of the housing. The output shaft of the motor is fixedly provided with a connecting shaft, and a chute is opened on the periphery of the connecting shaft; a fixing rod is slidably arranged in each chute in the vertical direction in a limited manner. A filter box is fixedly connected to each fixing rod, and the four fixing rods are distributed in a circumferential array along the central axis of the connecting shaft; a spring is fixedly arranged between each fixing rod and the corresponding chute, and the telescopic direction of the spring is the same as the sliding direction of the fixing rod.

[0009] Further, a first cleaning member for drivingly cooperating with the fixing rod and a second cleaning member for drivingly cooperating with the filter screen are provided in the housing.

[0010] Further, the first cleaning member includes a fixing cylinder. The fixing cylinder is fixedly arranged on the inner wall of the bottom of the housing and surrounds the outer surface of the connecting shaft, and the two are rotatably connected; two convex blocks are provided on the top of the fixing cylinder, one of the convex blocks is provided in multiple numbers, and the surface of the convex block is smooth and drivingly cooperates with the fixing rod.

[0011] Further, the second cleaning member includes a brush. The brush is fixedly arranged on the inner wall of the top of the housing, and the brush is fixedly arranged at the bottom of the fixing plate; the brush is arranged on the trajectory of the rotation and replacement of the filter box and drivingly cooperates with the top of the filter screen.

[0012] Further, a water tank is fixedly installed on the inner wall of the bottom of the housing. The water tank is arranged along the movement trajectory of the filter box. A fixed pipe is communicated with the water tank. The fixed pipe penetrates through the housing, and a control valve is arranged in the fixed pipe.

[0013] The present application has the following beneficial effects:

[0014] 1. After the air pump is started, the distance between the movable plate and the distance sensor can be detected by the distance sensor, so as to judge the degree of blockage of the filter screen. When the distance between the movable plate and the distance sensor is relatively close, it indicates that the ventilation volume of the filter screen is large, and the surface of the filter screen is not blocked and can be ventilated normally without replacing the filter screen. When the distance between the movable plate and the distance sensor is relatively far, it indicates that the ventilation volume of the filter screen is small, and there are more particulate impurities attached to the surface of the filter screen, resulting in blockage. Therefore, the filter screen needs to be replaced.

[0015] 2. When replacing the filter screen, only by driving the connecting shaft to rotate can the replacement be realized, and the whole process is more convenient without complicated operations.

[0016] 3. In the process of replacing the filter screen, the cleaning of the filter screen can be realized without removing the filter screen out of the device, which further increases the convenience of the operation. Moreover, each blocked filter screen will be cleaned multiple times under the cooperation of the convex block and the brush, so as to ensure the cleaning effect of the filter screen.

[0017] 4. The impurities that fall will be adsorbed by the liquid in the water tank, thus preventing the impurities from floating randomly and causing secondary pollution to the filter screen. Description of the Drawings

[0018] By referring to the following detailed description with reference to the drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understandable. In the drawings, several embodiments of the present invention are shown in an exemplary but not restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0019] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0020] Figure 2 is a schematic diagram of the internal structure of the housing of the present invention;

[0021] Figure 3 is a cross-sectional view of the connecting pipe of the present invention;

[0022] Figure 4 is the present invention Figure 3 a partial enlarged schematic view of part A in;

[0023] Figure 5 is the present invention Figure 3 a partial enlarged schematic view of part B in;

[0024] Figure 6 is a schematic diagram of the structure of the fixing rod of the present invention;

[0025] Figure 7 is a schematic diagram of the shape structure of the water tank of the present invention;

[0026] Figure 8 is a schematic diagram of the structure of the bump of the present invention.

[0027] Description of the Reference Numerals:

[0028] 1. Housing; 2. Air outlet pipe; 3. Air inlet pipe; 4. Fixed pipe; 5. Water tank; 6. Filter box; 7. Air pump; 8. Gas detector; 9. Motor; 10. Connecting shaft; 11. Filter screen; 12. Fixed cylinder; 13. Fixed rod; 14. Fixed plate; 15. Connecting pipe; 16. Movable plate; 17. Distance sensor; 18. Slide groove; 19. Spring; 20. Brush; 21. Bump. Detailed Embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Those skilled in the art should understand that the embodiments described below are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] As Figures 1-8 shown, the technical solution adopted by the present invention is as follows: An oil tanker liquid cargo tank escaped gas oil and gas concentration detection device includes a housing 1 and a replacement mechanism. An air outlet pipe 2 is fixedly arranged at the top of the housing 1, and an air inlet pipe 3 is fixedly arranged at the bottom of the housing 1. An air pump 7 is fixedly installed in the air inlet pipe 3, and the gas to be detected can be input into the air inlet pipe 3 through the air pump 7.

[0031] A connecting pipe 15 is fixedly connected and arranged at the bottom of the air outlet pipe 2, and a gas detector 8 is fixedly installed between the air outlet pipe 2 and the connecting pipe 15. A filter box 6 is inserted between the air inlet pipe 3 and the connecting pipe 15 through the transmission of the replacement mechanism. A filter screen 11 is fixedly installed in the filter box 6, and the air inlet pipe 3 and the connecting pipe 15 are connected through the insertion of the filter box 6. In addition, the connecting pipe 15, the filter box 6, and the air inlet pipe 3 are coaxial and have the same diameter. (It should be noted that after the filter box 6 slides and is inserted between the air inlet pipe 3 and the connecting pipe 15, the sliding fit parts of the filter box 6 with the connecting pipe 15 and the air inlet pipe 3 are in a sealed state)

[0032] A distance sensor 17 is fixedly arranged in the connecting pipe 15, and a movable plate 16 is slidably arranged along the length direction of the connecting pipe 15 in a limited manner. A plurality of through holes are formed in the movable plate 16, and the distance sensor 17 is used to detect the distance of the movable plate 16 relative to itself. The distance sensor 17 and the gas detector 8 are both electrically connected to an external control system (not shown in the figure). The external control system, the distance sensor 17, and the gas detector 8 are all prior arts and will not be described in detail in this solution.

[0033] Start the air pump 7, so that the gas to be detected enters from the air inlet pipe 3. After the gas to be detected passes through the filter screen 11 and the movable plate 16 in sequence, it is detected for the oil and gas concentration by the gas detector 8. After the detection is completed, the gas is discharged from the air outlet pipe 2.

[0034] The movable plate 16 in the above process will slide upward after being impacted by the gas. Therefore, according to the change in the distance between the movable plate 16 and the distance sensor 17, the value detected by the distance sensor 17 can be used to judge the degree of blockage of the filter screen 11. When the distance between the movable plate 16 and the distance sensor 17 is relatively close, it indicates that the ventilation volume of the filter screen 11 is large. At this time, the surface of the filter screen 11 is not blocked and can be ventilated normally without replacing the filter screen 11. When the distance between the movable plate 16 and the distance sensor 17 is relatively far, it indicates that the ventilation volume of the filter screen 11 is small. At this time, there are more particulate impurities attached to the surface of the filter screen 11, resulting in blockage, and the filter screen 11 needs to be replaced.

[0035] The replacement mechanism includes a motor 9. The top inner wall of the housing 1 is fixedly installed with the motor 9. The output shaft of the motor 9 is fixedly provided with a connecting shaft 10. A chute 18 is opened on the periphery of the connecting shaft 10. A fixing rod 13 is slidably arranged in each chute 18 in the vertical direction. One end of each fixing rod 13 away from the connecting shaft 10 is fixedly connected with a filter box 6. The four fixing rods 13 are arranged in a circumferential array along the central axis of the connecting shaft 10. In addition, a spring 19 is fixedly arranged between each fixing rod 13 and the corresponding chute 18. The telescopic direction of the spring 19 is the same as the sliding direction of the fixing rod 13.

[0036] Both a first cleaning member in transmission cooperation with the fixing rod 13 and a second cleaning member in transmission cooperation with the filter screen 11 are provided in the housing 1.

[0037] The first cleaning member includes a fixing cylinder 12. The bottom inner wall of the housing 1 is fixedly provided with the fixing cylinder 12. The fixing cylinder 12 surrounds the outer surface of the connecting shaft 10 and the two are rotatably connected. There are two protrusions 21 on the top of the fixing cylinder 12. One of the protrusions 21 is provided in multiple numbers. The surface of the protrusion 21 is smooth and in transmission cooperation with the fixing rod 13. During the rotation of the fixing rod 13, it will contact the protrusion 21, and thus vibrate up and down under the elastic action of the spring 19, so as to shake off the particulate impurities below the filter screen 11.

[0038] The second cleaning member includes a brush 20. The top inner wall of the housing 1 is fixedly provided with a fixing plate 14. The brush 20 is fixedly provided at the bottom of the fixing plate 14. The brush 20 is arranged on the track of the rotation and replacement of the filter box 6, and the brush 20 is in transmission cooperation with the top of the filter screen 11.

[0039] (It should be noted that for the filter box 6 that needs to be replaced, the two protrusions 21 are respectively arranged at the positions where the filter box 6 rotates counterclockwise by 90° and 180°, while the brush 20 is arranged at the position where it rotates counterclockwise by 270°)

[0040] In addition, a water tank 5 is fixedly installed on the inner wall of the bottom of the housing 1. The water tank 5 is arranged along the movement track of the filter box 6. A fixed pipe 4 is communicated with the water tank 5. The fixed pipe 4 penetrates through the housing 1, and a control valve is arranged in the fixed pipe 4. Water can be input into or output from the water tank 5 through the fixed pipe 4, so as to adsorb the falling dust and impurities.

[0041] Working principle: When detecting the oil and gas concentration, start the air pump 7, so that the gas to be detected enters from the air inlet pipe 3. After the gas to be detected passes through the filter screen 11 and the movable plate 16 in sequence, the oil and gas concentration is detected by the gas detector 8. The filter screen 11 can block dust, oil or other particles in the environment from entering the inside of the gas detector 8, avoid these impurities covering the surface of the sensor or blocking the gas path, and avoid dust affecting the detection accuracy or damaging the gas detector 8.

[0042] After the detection is completed, the gas will be discharged from the air outlet pipe 2.

[0043] Since the movable plate 16 will slide upward by different distances under the impact force of gases of different sizes, in the above process, the operator can judge the degree of blockage of the filter screen 11 according to the distance change between the movable plate 16 and the distance sensor 17, and use the value detected by the distance sensor 17. When the distance between the movable plate 16 and the distance sensor 17 is relatively close, it means that the ventilation volume of the filter screen 11 is large. At this time, the surface of the filter screen 11 is not blocked, and normal ventilation can be carried out without replacing the filter screen 11. When the distance between the movable plate 16 and the distance sensor 17 is relatively far, it means that the ventilation volume of the filter screen 11 is small. At this time, there are more particulate impurities attached to the surface of the filter screen 11, resulting in blockage, and the filter screen 11 needs to be replaced.

[0044] When the distance between the movable plate 16 and the distance sensor 17 is relatively far, the filter screen 11 needs to be replaced. At this time, turn off the air pump 7 and start the motor 9. The output shaft of the motor 9 drives the connecting shaft 10 to rotate counterclockwise by 90°. The connecting shaft 10 drives a plurality of fixing rods 13 to rotate counterclockwise by 90°.

[0045] During the process of the blocked filter screen 11 rotating by 90°, the fixing rod 13 connected to the blocked filter screen 11 will pass through the first convex block 21 on the fixed cylinder 12. The fixing rod 13 will vibrate up and down under the elastic action of the spring 19, so as to shake off the particulate impurities attached to the lower part of the filter screen 11, making them fall into the water tank 5 and be adsorbed by the liquid in the water tank 5, thus avoiding the shaken-off impurities floating onto the filter screen 11 again, and further preliminarily cleaning the particulate matter attached to the surface of the filter screen 11. The cleaned filter screen 11 and filter box 6 will enter the connecting pipe 15 again for use.

[0046] During the subsequent replacement of the filter screen 11, the initially cleaned filter screen 11 will be further cleaned by another bump 21 and a brush 20. Therefore, each used filter screen 11 will be cleaned three times before being reused, thus ensuring the cleaning effect of the filter screen 11.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for detecting the concentration of oil and gas escaping from a liquid cargo tank of an oil tanker, characterized in that: The invention comprises a shell (1) and a replacement mechanism, wherein an air outlet pipe (2) is fixedly arranged at the top of the shell (1), an air inlet pipe (3) is fixedly arranged at the bottom of the shell (1), a connecting pipe (15) is arranged in communication with the bottom of the air outlet pipe (2), a gas detector (8) is fixedly installed between the air outlet pipe (2) and the connecting pipe (15), and an air pump (7) is fixedly installed in the air inlet pipe (3); a filter box (6) is inserted between the air inlet pipe (3) and the connecting pipe (15) through the transmission of the replacement mechanism, a filter screen (11) is fixedly arranged in the filter box (6), and communication between the air inlet pipe (3) and the connecting pipe (15) is achieved through the insertion of the filter box (6); a movable plate (16) is not only provided in the connecting pipe (15) for limited sliding along its length direction, but also a distance sensor (17) is fixedly arranged, a plurality of through holes are provided on the movable plate (16), and the distance sensor (17) is used to detect the distance of the movable plate (16) relative to itself.

2. The device for detecting the concentration of oil and gas escaping from a liquid cargo tank of an oil tanker according to claim 1, characterized in that: The replacement mechanism comprises a motor (9), the motor (9) is fixedly mounted on the top inner wall of the housing (1), the output shaft of the motor (9) is fixedly provided with a connecting shaft (10), and a slide groove (18) is provided around the connecting shaft (10); a fixed rod (13) is provided in each slide groove (18) for limited sliding along a vertical direction, each fixed rod (13) is fixedly connected to a filter box (6), and the four fixed rods (13) are distributed in a circular array along the central axis of the connecting shaft (10); a spring (19) is fixedly provided between each fixed rod (13) and the slide groove (18) in which it is located, and the extension and contraction direction of the spring (19) is the same as the sliding direction of the fixed rod (13).

3. The device for detecting the concentration of oil and gas escaping from a liquid cargo tank of an oil tanker according to claim 2, characterized in that: The housing (1) is provided with a first cleaning member that is in transmission cooperation with the fixing rod (13) and a second cleaning member that is in transmission cooperation with the filter screen (11).

4. The device for detecting the concentration of oil and gas escaping from a liquid cargo tank of an oil tanker according to claim 3, characterized in that: The first cleaning member comprises a fixed cylinder (12), the fixed cylinder (12) being fixedly arranged on the inner wall of the bottom of the housing (1), the fixed cylinder (12) surrounding the outer surface of the connecting shaft (10), and the two being rotatably connected; two protrusions (21) are arranged at the top of the fixed cylinder (12), and one protrusion (21) is provided with a plurality of protrusions, the surface of the protrusion (21) is smooth and is in transmission cooperation with the fixed rod (13).

5. The device for detecting the concentration of oil and gas escaping from a liquid cargo tank of an oil tanker according to claim 3, characterized in that: The second cleaning member comprises a brush (20); a fixing plate (14) is fixedly arranged on the top inner wall of the housing (1); and the brush (20) is fixedly arranged on the bottom of the fixing plate (14); the brush (20) is arranged on a rotation and replacement track of the filter box (6), and the brush (20) is in transmission cooperation with the top of the filter screen (11).

6. The device for detecting the concentration of oil and gas escaping from a liquid cargo tank of an oil tanker according to claim 1, characterized in that: A water tank (5) is fixedly mounted on the inner wall of the bottom of the housing (1), the water tank (5) is arranged along the movement track of the filter box (6), a fixed pipe (4) is arranged on the water tank (5), the fixed pipe (4) passes through the housing (1), and a control valve is arranged in the fixed pipe (4).

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