CN213364641U

CN213364641U - Fuel leakage monitoring device in water tank

Info

Publication number: CN213364641U
Application number: CN202022456232.1U
Authority: CN
Inventors: 王乐; 胡敏芝; 李仁科; 郑卓
Original assignee: 708th Research Institute of CSIC
Current assignee: 708th Research Institute of CSIC
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-06-04
Anticipated expiration: 2030-10-29

Abstract

The utility model relates to a fuel leakage monitoring devices and monitoring method in sump belongs to environmental protection technical field. The device comprises an electrode, a floating body movement structural part, a cable and a transmitting unit; a floating body moving structural part is arranged in the water tank, and a floating body positioned on the water surface in the water tank is arranged on the floating body moving structural part; the floating body is provided with an electrode which is in contact with the water surface and is used for monitoring the impedance value of the water surface liquid, and the electrode is connected with the transmitting unit through a cable. Once fuel oil leaks to the water tank, the electrodes on the sensor unit can detect that the liquid impedance is changed from the impedance value of water to the impedance value of the fuel oil, the existence of the fuel oil can be detected, an alarm signal is sent immediately, and a crew can find the leakage at the first time, so that corresponding measures can be taken in time to prevent the leakage, and the occurrence of marine pollution is avoided.

Description

Fuel leakage monitoring device in water tank

Technical Field

The utility model relates to a fuel leakage monitoring device in water tank belongs to the environmental protection technology field.

Background

With the improvement of environmental protection requirements in the processes of ship manufacturing and ship sailing, the importance of ship and marine structure environmental protection is continuously emphasized in various specifications of international maritime life safety convention, international convention for preventing ship pollution of international maritime organization and classification societies of various countries, wherein the influence of oil pollutants on marine environment is far and profound, and the oil pollutants are also the objects of important concern of all parties.

There is still no effective method for real-time monitoring of the occurrence of fuel leakage in the tanks of ships and marine structures adjacent to the fuel tank. For how to ensure that no fuel leaks into the adjacent water tanks of the fuel tanks, except that an isolation empty tank is arranged between the water tanks and the fuel tanks according to the standard requirements, when the fuel tanks are adjacent to the water tanks, timely monitoring whether the fuel leaks into the water tanks is also an effective means approved by various classification societies for preventing the fuel leakage. Because the adoption of the isolated empty cabin method can greatly influence the cabin capacity and the weight of the ship and the marine structure, the scheme of adopting the isolated empty cabin has certain limitation in the design of the actual ship and the marine structure. Therefore, a technology which can not only realize low energy consumption but also monitor whether the liquid on the inner surface layer of the water tank contains fuel oil in real time, namely a method for monitoring whether fuel oil leakage occurs in the water tank in real time with low energy consumption, is urgently needed in the technical field.

Disclosure of Invention

The utility model aims at solving the technical problem of how to monitor whether there is fuel leakage in the water tank in real time.

In order to achieve the purpose of solving the problems, the technical scheme adopted by the utility model is to provide a fuel leakage monitoring device in a water tank, which comprises an electrode, a floating body movement structural part, a cable and a transmitting unit; a floating body moving structural part is arranged in the water tank, and a floating body positioned on the water surface in the water tank is arranged on the floating body moving structural part; the floating body is provided with an electrode which is in contact with the water surface and is used for monitoring the impedance value of the water surface liquid, and the electrode is connected with the transmitting unit through a cable.

Preferably, the floating body moving structure comprises a guide post and a bottom connecting rod; the bottom connecting rod is arranged at the bottom of the water tank, and the bottom connecting rod is provided with a guide post.

Preferably, the guide post is connected with the bottom connecting rod perpendicular to the horizontal plane.

Preferably, the bottom connecting rod is fixedly connected to the bottom of the water tank.

Preferably, the floating body is provided with a through hole for penetrating through the guide post, and the diameter of the through hole is larger than that of the guide post.

Preferably, the through hole wall of the floating body is provided with a roller for sliding on the guide column.

Preferably, a pulley mechanism for winding and unwinding the cable is arranged between the floating body and the transmission unit.

Preferably, a spring mechanism for retracting the cable is arranged in the pulley mechanism.

Preferably, the number of the guide posts is at least one.

Preferably, the guide posts are three, the bottom connecting rods are triangular, and the guide posts are arranged at included angles of the triangular bottom connecting rods.

Compared with the prior art, the utility model discloses following beneficial effect has:

each water tank is independently provided with a set of sensor unit and a guide mechanism, signals of the sensor units are monitored in real time, whether fuel oil leaks into the water tank or not can be judged in real time, once the fuel oil leaks into the water tank, the corresponding sensor units in the water tank can detect the existence of the fuel oil, an alarm signal is sent immediately, a crew can find the leakage in the first time, so that corresponding measures can be taken in time to prevent the leakage, and meanwhile, a method that sea is not drained is taken for the water tank with the leaked fuel oil, so that the occurrence of marine pollution is avoided.

Drawings

Fig. 1 is a schematic side view of the structure of the present invention.

Fig. 2 is a schematic top view of the structure of the present invention.

Reference numerals: 1. an electrode; 2. a guide post; 3. a bottom connecting rod; 4. a float; 5. a pulley mechanism; 6. a cable; 7. and a transmitting unit.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:

as shown in fig. 1-2, the utility model provides a fuel leakage monitoring device in a water tank, which comprises an electrode 1, a floating body 4, a floating body movement structural member, a cable 6 and a transmitting unit 7; a floating body moving structural part is arranged in the water tank, and a floating body 4 positioned on the water surface in the water tank is arranged on the floating body moving structural part; an electrode 1 which is contacted with the water surface and is used for monitoring the impedance value of the water surface liquid is arranged on the floating body 4, and the electrode 1 is connected with a transmitting unit 7 through a cable 6. The floating body movement structural part comprises a guide post 2 and a bottom connecting rod 3; the bottom connecting rod 3 is arranged at the bottom of the water tank, and the guide column 2 is perpendicular to the horizontal plane and is connected with the bottom connecting rod 3. The bottom connecting rod 3 is fixedly connected to the bottom of the water tank. The floating body 4 is provided with a through hole for penetrating through the guide post 2, and the diameter of the through hole is larger than that of the guide post 2. The through hole wall of the floating body 4 is provided with a roller which is used for sliding on the guide post 2. A pulley mechanism 5 for winding and unwinding the cable 6 is provided between the floating body 4 and the transmission unit 7. The pulley mechanism 5 is provided with a spring mechanism for winding and unwinding the cable 6. The number of the guide posts 2 is at least one. The guide posts 2 are arranged into three, the bottom connecting rods 3 are arranged into a triangle, and the guide posts 2 are arranged on the included angles of the triangular bottom connecting rods 3.

The utility model provides a pair of monitoring method of fuel leakage monitoring devices in water tank, including following step:

step 1: a sensor unit consisting of an electrode 1 and a floating body 4 is placed on the water surface of the water tank, and the electrode 1 is connected with a transmitting unit 7 outside the water tank through a cable 6;

step 2: the two electrodes 1 monitor the impedance value of liquid in the water tank in real time, once fuel oil leaks from the water tank, the fuel oil floats to the water surface, the electrodes 1 on the sensor unit detect that the liquid impedance is changed from the impedance value of water to the impedance value of the fuel oil, the impedance signal is transmitted to a transmitting unit 7 outside the water tank through a cable 6, and the transmitting unit 7 processes the signal and transmits the signal to a central control system;

and step 3: the central control system receives the signal transmitted by the transmitting unit 7, and then sends out an alarm signal to inform the crew that the fuel oil in the corresponding water tank leaks into the water tank.

The utility model aims at providing a device and monitoring method that survey is carried out water tank inner surface layer liquid, this method can survey water tank inner surface layer liquid and whether contain the fuel, judges from this whether the water tank has had the fuel to leak into. The utility model discloses realize above-mentioned purpose's technical scheme is: a sensor unit with a floating body is arranged in the water tank by utilizing a set of guide mechanism, and under the action of the guide mechanism and the floating body, the sensor unit can be always positioned on the surface of the water tank, and the weight of the sensor unit and the size of the floating body are controlled to ensure that the sensor can be always immersed in liquid. A pulley mechanism with a spring is arranged in the guide mechanism, and can be used for retracting and releasing a cable connected with the sensor, when the liquid level in the water tank rises, the sensor unit rises along with the pulley mechanism, the spring on the pulley is tightened, and the cable is wound on the pulley; when the liquid level in the water tank descends, the sensor unit descends along with the liquid level, the spring on the pulley is loosened, and the cable is placed down from the pulley.

The sensor unit is characterized in that the sensor unit is used for measuring the conductivity of a liquid medium to judge the type of the liquid medium, only water exists in the water tank under normal conditions, the impedance is low, once fuel oil leaks into the water tank, the fuel oil floats on the water surface because the density of the fuel oil is smaller than that of the water, the sensor is positioned on the surface layer of the liquid surface, and once the measured impedance of the medium is increased to the impedance value of the fuel oil, the fact that the fuel oil leaks into the water tank can be judged.

Examples

The integral density of a sensor unit consisting of the electrode 1 and the floating body 4 is slightly less than that of water, the sensor unit can float on the liquid level of the water tank, and the electrode 1 positioned at the bottom of the floating body 4 is always immersed in the liquid; the guide post 2, the bottom connecting rod 3 and the pulley mechanism 5 with the spring form a guide mechanism, the top and bottom connecting rods 3 of the guide post 2 are fixed on a ship structure, the sensor unit can move up and down along with the rising and falling of the liquid level in the water tank under the limitation of the guide mechanism, the cable 6 connected with the electrode 1 is wound on the guide mechanism with the spring, and the cable can be wound and unwound along with the tightening and loosening of the spring when the sensor unit moves up and down; the two electrodes 1 monitor the impedance value of the liquid in real time, impedance signals are transmitted to a transmitting unit 7 outside the water tank through a cable 6, and the transmitting unit 7 processes the signals and transmits the processed signals to a central control system. Once fuel oil leaks into the water tank, the fuel oil floats on the water surface, the electrode 1 on the sensor unit changes the impedance value of the water into the impedance value of the fuel oil by detecting the liquid impedance, the change of the impedance value is converted into an alarm signal in the transmitting unit 7, and the central control system can send out the alarm signal to inform a crew that the fuel oil leaks into the corresponding water tank.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a fuel leakage monitoring devices in water tank which characterized in that: the device comprises an electrode, a floating body movement structural part, a cable and a transmitting unit; a floating body moving structural part is arranged in the water tank, and a floating body positioned on the water surface in the water tank is arranged on the floating body moving structural part; the floating body is provided with an electrode which is in contact with the water surface and is used for monitoring the impedance value of the water surface liquid, and the electrode is connected with the transmitting unit through a cable.

2. The fuel leakage monitoring device in a water tank of claim 1, wherein: the floating body movement structural part comprises a guide column and a bottom connecting rod; the bottom connecting rod is arranged at the bottom of the water tank, and the bottom connecting rod is provided with a guide post.

3. The fuel leakage monitoring device in a water tank of claim 2, wherein: the guide post is perpendicular to the horizontal plane and is connected with the bottom connecting rod.

4. A fuel leakage monitoring device in a water tank as claimed in claim 3, wherein: the bottom connecting rod is fixedly connected to the bottom of the water tank.

5. The fuel leakage monitoring device in a water tank of claim 4, wherein: the floating body is provided with a through hole for penetrating through the guide post, and the diameter of the through hole is larger than that of the guide post.

6. The fuel leakage monitoring device in a water tank of claim 5, wherein: and the wall of the through hole of the floating body is provided with a roller which is used for sliding on the guide column.

7. The fuel leakage monitoring device in a water tank of claim 1, wherein: and a pulley mechanism for winding and unwinding the cable is arranged between the floating body and the transmitting unit.

8. The fuel leakage monitoring device in a water tank of claim 7, wherein: and a spring mechanism for retracting and releasing the cable is arranged in the pulley mechanism.

9. The fuel leakage monitoring device in a water tank of claim 2, wherein: the number of the guide posts is at least one.

10. The fuel leakage monitoring device in a water tank of claim 9, wherein: the guide posts are three, the bottom connecting rods are triangular, and the guide posts are arranged at included angles of the triangular bottom connecting rods.