Container ship fuel cabin and fuel leakage detection device

Abstract

The invention discloses a container ship fuel cabin and a fuel leakage detection device, and relates to the technical field of fuel cabins. The cabin body is composed of an inner shell, a middle layer and an outer shell; the isolating layer is arranged on the inner wall of the inner shell and is made of a corrosion-resistant elastic material, such as fluororubber, and the surface of the isolating layer is coated with an anti-permeation coating, such as a polyurea coating; the protection structure is distributed on the top and the side wall of the cabin body and comprises a plurality of groups of transverse reinforcing ribs and longitudinal supporting beams to form a gridding compression-resistant frame; it needs to be explained that the protection structure is constructed in the middle layer, used for improving the overall pressure resistance and impact resistance of the cabin body and used as a first layer of protection barrier for the fuel cabin. The multi-layer composite cabin body is combined with the honeycomb structure, the impact resistance and the heat insulation performance are improved, dynamic sealing of the arc-shaped tank wall is achieved through the movable structure of the sealing bottom plate and the sealing top plate, therefore, isolation operation during fuel leakage is achieved, and safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fuel tanks, and in particular to a container ship fuel tank and a fuel leakage detection device. Background Art

[0002] With the continuous development of global trade, container ships, as an important tool for maritime transportation, are experiencing an increasing demand and scale. In order to meet increasingly stringent environmental protection requirements and improve the economic efficiency of ships, the fuel tank technology of container ships is also constantly developing and innovating.

[0003] In recent years, with the increasing use of new clean fuels such as methanol on ships, the requirements for fuel tanks have also changed. Methanol fuel is highly corrosive, so special treatment of fuel tanks is required, such as setting up isolated empty tanks and using special paint.

[0004] However, the existing fuel tank structure still has some shortcomings in terms of safety. For example, the fuel tank is not strong enough to resist external damage. At the same time, it is difficult to detect fuel leakage in time, and there is no isolation function. When methanol leaks, it will quickly spread to the entire cabin, affecting the safety of the surrounding environment.

[0005] Therefore, the present application proposes a container ship fuel tank and a fuel leakage detection device. Summary of the invention

[0006] The purpose of the present application is to solve the problems in the above-mentioned background technology, and to provide a container ship fuel tank and a fuel leakage detection device.

[0007] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A container ship fuel tank, comprising: The cabin is composed of an inner shell, an intermediate layer and an outer shell; The isolation layer is arranged on the inner wall of the inner shell and is made of corrosion-resistant elastic material and coated with an anti-permeability coating on the surface; The protective structure is distributed on the top and side walls of the cabin, including multiple sets of transverse stiffeners and longitudinal support beams to form a gridded compression-resistant frame; Bottom guide grooves, which are in multiple numbers and extend longitudinally along the bottom of the cabin; The fuel compartment frame comprises a rectangular steel frame fixedly mounted on the inner bottom of the inner shell, in which the fuel chamber is mounted, a curved tank wall is mounted on the rectangular steel frame, the rectangular steel frame divides the curved tank wall into an upper cavity, a middle cavity and a lower cavity, a plurality of sealed inspection doors connected to the middle cavity are arrayed on the curved tank wall, an air intake and water injection pipe connected to the upper cavity is mounted on the top of the curved tank wall, a sealed top plate movable up and down in the middle cavity is mounted on the top of the rectangular steel frame, and a sealed bottom plate movable up and down in the lower cavity is mounted on the bottom of the rectangular steel frame.

[0008] Furthermore, the middle layer is a honeycomb reinforcement structure filled with impact-resistant composite materials, and a temperature sensor is embedded in the honeycomb structure of the middle layer.

[0009] Furthermore, the rectangular steel frame includes a leaking bottom frame installed in the lower cavity, and a supporting frame is fixedly connected to the leaking bottom frame. The upper cavity is constructed between the top of the supporting frame and the arc-shaped tank wall, and both ends of the arc-shaped tank wall are constructed with sealing end plates for sealing the leaking bottom frame and the supporting frame at both ends of the length.

[0010] Furthermore, the leakage bottom frame includes a grille mesh plate whose bottom is fixedly connected to the bottom of the inner shell, and both sides of the grille mesh plate are constructed with inclined side panels arranged inclined upward, and a bearing mesh frame is fixedly connected between the upper ends of the two inclined side panels, and the bottom of the bearing mesh frame is constructed with multiple columns connected to the upper surface of the grille mesh plate, and the sealing bottom plate is slidably sleeved on the columns.

[0011] Furthermore, the sealing bottom plate includes a hollow frame that is slidably sleeved on the column, the length of the hollow frame has a gap between the two ends and the sealing end plates, the hollow frame is filled with insulation blocks, and the upper side of the hollow frame is configured with a plurality of sealing protrusions for sealing the mesh opening of the supporting mesh frame, and both side ends of the hollow frame are fixedly connected with trapezoidal blocks for resisting the oblique side plates.

[0012] Furthermore, the support frame includes a support vertical plate fixedly connected to the upper ends of two inclined side plates, the upper end of the support vertical plate is arrayed with a plurality of through openings arranged opposite to the sealed inspection door, the upper end of the support vertical plate abuts against the arc-shaped tank wall, a support top plate is connected between the tops of the two support vertical plates, a plurality of column tubes distributed on both sides of the upper surface of the support top plate are penetrated and connected between the support top plate and the bearing mesh frame, the top of the support top plate is constructed with two symmetrical and inclined guide slopes arranged downward toward the column tubes, a vent is constructed in the middle of the support top plate, a guide umbrella cover for covering the vent is installed on the support top plate, and the air suction and water injection pipes are arranged directly above the guide umbrella cover.

[0013] Furthermore, the air suction and water injection pipeline includes a plurality of vertical pipes fixedly connected to the top of the arc-shaped tank wall, a converging cross pipe is connected between the tops of the plurality of vertical pipes, an air extraction pipe and a water adding pipe are connected to the converging cross pipe, the air extraction pipe is connected to the vacuum pump, the water adding pipe is connected to the water pump, and control valves are installed in the air extraction pipe and the water adding pipe.

[0014] Furthermore, the opposite sides of the two supporting vertical plates are constructed with limiting horizontal bars located in the middle of the through-hole, and the sealing top plate includes a horizontal frame slidably sleeved on the column tube, the horizontal frame is filled with lightweight blocks, the bottom of the horizontal frame is in contact with the limiting horizontal bar, and the top of the horizontal frame is constructed with a piston column block for sealing the vent hole.

[0015] A fuel leakage detection device for the above-mentioned fuel tank, comprising: The detection unit comprises a directional flow guiding cavity constructed in the bottom flow guiding groove, wherein the directional flow guiding cavity is connected with a flow guiding pipe which is inclined upward and connected with two sides of the arc-shaped tank wall, wherein the end of the flow guiding pipe is connected with the lower cavity of the arc-shaped tank wall and is located on the upper side of the sealing bottom plate, and a fuel detection pump is installed in the flow guiding pipe; The diversion collecting component is installed in the diversion umbrella cover.

[0016] Furthermore, the diversion umbrella cover includes a plurality of support rods distributed in an array along the circumferential side of the vent, the top of the support rods is fixedly connected with an arc-shaped cover plate, the edge of the arc-shaped cover plate is located outside the vent, and the diversion collecting piece includes a multi-stage filter screen filled in the arc-shaped cover plate and used to filter fuel.

[0017] The beneficial effects of this application are as follows: The present application configures the cabin as a multi-layer composite structure and installs a honeycomb structure and a gridded compression-resistant frame therein, thereby greatly improving the impact resistance and heat insulation performance of the cabin. At the same time, a rectangular steel frame and an arc-shaped tank wall are arranged in the cabin, and the fuel chamber can be arranged therein to separate it from the outside. The double-layer protection greatly improves the impact resistance and increases safety.

[0018] The present application can separate the fuel chamber from the cabin body by setting up an arc-shaped tank wall. Under normal circumstances, the sealing top plate and the sealing bottom plate are moved down, opening the connection between the upper cavity, the middle cavity and the lower cavity, so that the arc-shaped tank wall is connected to the bottom guide groove to form a flow structure, which is convenient for personnel to inspect and operate. When fuel leakage occurs inside, the fuel leakage detection device can be used to quickly detect it, and then the gas in the arc-shaped tank wall can be quickly extracted through the air suction and water injection pipeline to reduce the air pressure therein, and the sealing top plate and the sealing bottom plate are moved up in turn, thereby isolating the middle cavity to prevent fuel leakage to the outside and causing corrosion, thereby further increasing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of this application; Figure 2 It is a half-section diagram of the three-dimensional structure of the present application; Figure 3 This is a three-dimensional structural diagram of the cabin of this application; Figure 4 It is a three-dimensional structural diagram of the middle layer of this application; Figure 5 This is a three-dimensional structural diagram of the curved tank wall of the present application; Figure 6 This is a half-section diagram of the three-dimensional structure of the fuel compartment frame of the present application; Figure 7 This is a partial three-dimensional structural diagram of the fuel tank frame of the present application; Figure 8 This application Figure 7 Half-section of the three-dimensional structure; Fig. 9 This is a three-dimensional structural diagram of a rectangular steel frame of the present application; Figure numerals: 1, cabin; 101, inner shell; 102, middle layer; 103, outer shell; 2, isolation layer; 3, protective structure; 301, transverse reinforcement rib; 302, longitudinal support beam; 4, bottom guide groove; 5, fuel compartment frame; 501, upper cavity; 502, middle cavity; 503, lower cavity; 6, rectangular steel frame; 601, leakage bottom frame; 6011, grid mesh plate; 6012, oblique side plate; 6013, load-bearing mesh frame; 6014, column; 602, support frame; 6021, support vertical plate; 60211, limit horizontal bar; 6022, through-hole; 6023, support top plate; 6024, column tube; 6025, guide slope; 6026, vent; 7 , curved tank wall; 701, sealed inspection door; 702, air intake and water injection pipeline; 7021, vertical pipe; 7022, converging cross pipe; 7023, exhaust pipe; 7024, water adding pipe; 7025, control valve; 703, sealed end plate; 8, sealed top plate; 801, horizontal frame; 802, lightweight block; 803, piston column block; 9, sealed bottom plate; 901, hollow frame; 902, insulation block; 903, sealing protrusion; 904, trapezoidal block; 10, guide umbrella cover; 1001, support rod; 1002, curved cover plate; 11, detection unit; 1101, directional guide cavity; 1102, guide pipe; 1103, fuel detection pump; 12, guide collection piece; 1201, multi-stage filter. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0021] like Figure 1-Figure 7As shown, a container ship fuel tank proposed in one embodiment of the present application includes: The cabin 1 is composed of an inner shell 101, an intermediate layer 102 and an outer shell 103, and the inner shell 101 and the outer shell 103 are connected by the intermediate layer 102; The isolation layer 2 is arranged on the inner wall of the inner shell 101 and is made of a corrosion-resistant elastic material, such as fluororubber, and is coated with an anti-permeation coating, such as a polyurea coating; The protective structure 3 is distributed on the top and side walls of the cabin 1, and includes a plurality of groups of transverse reinforcing ribs 301 and longitudinal support beams 302, forming a gridded compression-resistant frame; It should be noted that the protective structure 3 is constructed in the middle layer 102 to increase the overall pressure and impact resistance of the tank 1 and serve as the first layer of protection barrier for the fuel tank; Bottom guide grooves 4, which are multiple in number and extend longitudinally along the bottom of the cabin 1, and are arranged at the inner bottom of the inner shell 101, and are mainly used to collect cooling water flow; The fuel compartment frame 5 includes a rectangular steel frame 6 fixedly mounted on the bottom of the inner shell 101. The rectangular steel frame 6 is arranged on the upper side of a part of the bottom guide groove 4 and is connected to a part of the bottom guide groove 4. The fuel compartment is installed therein. An arc tank wall 7 is mounted on the rectangular steel frame 6. The rectangular steel frame 6 divides the arc tank wall 7 into an upper cavity 501, a middle cavity 502 and a lower cavity 503. A plurality of sealed inspection doors 701 connected to the middle cavity 502 are arranged in an array on the arc tank wall 7. An air suction and water injection pipe 702 connected to the upper cavity 501 is installed on the top of the wall 7. The arc tank wall 7 wraps the fuel chamber as a whole in the crane. When the sealed inspection door 701 is closed, the arc tank wall 7 is connected to the external cabin 1 only by the bottom guide groove 4, and the air suction and water injection pipe 702 is used as a ventilation pipe. A sealing top plate 8 that moves up and down in the middle cavity 502 is installed on the top of the rectangular steel frame 6, and a sealing bottom plate 9 that moves up and down in the lower cavity 503 is installed on the bottom of the rectangular steel frame 6. The overall structure can be divided into two states. One is the normal state, in which the fuel chamber works normally, the sealing top plate 8 and the sealing bottom plate 9 are both in the lower side position, the upper cavity 501 and the middle cavity 502 are interconnected, and the middle cavity 502 and the lower cavity 503 are also interconnected. Therefore, the space inside the arc tank wall 7 is interconnected with the bottom guide groove 4 as a whole, which can facilitate personnel to enter the fuel chamber for maintenance operations. In this state, when the temperature inside the fuel chamber is too high, the upper cavity 501 and the lower cavity 503 can also be filled with air through the suction and water injection pipe 702. 3 is injected with water for cooling, and then the bottom guide groove 4 is used to discharge the water to reduce the internal temperature, ensure the cooling effect, and ensure the safety of the fuel chamber. The second is the fuel leakage state. At this time, the sealing bottom plate 9 and the sealing top plate 8 are moved up in sequence to seal the lower cavity 503 and the middle cavity 502 respectively, and then the middle cavity 502 and the upper cavity 501 are sealed, so as to completely isolate the middle cavity 502 where the fuel chamber is located, avoid continuous leakage of fuel to cause corrosion to the outside, and further increase safety.

[0022] like Figure 4 As shown, in some embodiments, the middle layer 102 is a honeycomb reinforced structure filled with impact-resistant composite materials, and the honeycomb structure of the middle layer 102 is embedded with a temperature sensor. It should be noted that the middle layer 102 is mainly divided into two parts, one part is the upper and lower layers, which are located on the upper and lower sides of the inner shell 101, and the other part is the left and right layers, which are located on the horizontal sides of the inner shell 101. The honeycomb structures in the upper and lower layers are filled with vertical cylindrical arrays, while the honeycomb structures in the left and right layers are horizontally extended along the length direction of the cabin 1 and can be used as ventilation ducts. The temperature sensor is arranged in the vertical cylindrical honeycomb structure to monitor the temperature changes inside the cabin 1 at all times to ensure safety.

[0023] like Figure 5 and Fig. 9 As shown, in some embodiments, the rectangular steel frame 6 includes a leaking bottom frame 601 installed in the lower cavity 503, and a support frame 602 is fixedly connected to the leaking bottom frame 601. The upper cavity 501 is constructed between the top of the support frame 602 and the curved tank wall 7. Both ends of the curved tank wall 7 are constructed with sealing end plates 703 for sealing the leaking bottom frame 601 and the support frame 602 at both ends of the length. The leaking bottom frame 601 is connected to the bottom guide groove 4, and the support frame 602 is connected to the air suction and water injection pipe 702. The air in the curved tank wall 7 can be extracted by the air suction and water injection pipe 702, and the gas in the cabin 1 will enter the curved tank wall 7 from the lower cavity 503 through the bottom guide groove 4, so as to form circulation and ensure the ventilation effect of the structure.

[0024] like Figure 8-Figure 9As shown, in some embodiments, the leakage bottom frame 601 includes a grid mesh plate 6011 whose bottom is fixedly connected to the bottom of the inner shell 101, and both sides of the grid mesh plate 6011 are configured with oblique side plates 6012 arranged obliquely upward, and a bearing mesh frame 6013 is fixedly connected between the upper ends of the two oblique side plates 6012, and the bottom of the bearing mesh frame 6013 is configured with a plurality of columns 6014 connected to the upper surface of the grid mesh plate 6011, and the sealing bottom plate 9 is slidably sleeved on the columns 6014, and the grid mesh plate 6011 is laid on the bottom of the inner shell 101 and is located in a portion of the bottom guide groove 4 On the upper side, it can be connected with the bottom guide groove 4. It should be noted that the arc-shaped tank wall 7 is sleeved on the oblique side plate 6012, and a lower cavity 503 is formed between the oblique side plate 6012 and the supporting mesh frame 6013. The fuel chamber equipment is installed on the upper side of the supporting mesh frame 6013, and the sealing bottom plate 9 is arranged on the lower side of the supporting mesh frame 6013. When the sealing bottom plate 9 moves upward, the supporting mesh frame 6013 will be blocked, so as to isolate the middle cavity 502 from the lower cavity 503, so as to block the connection with the bottom guide groove 4, avoid fuel leakage into the cabin 1, and increase safety.

[0025] like Figure 8 As shown, in some embodiments, the sealing bottom plate 9 includes a hollow frame 901 that is slidably sleeved on the column 6014, and the length of the hollow frame 901 has a gap between the two ends and the sealing end plate 703. The setting of the column 6014 can guide the up and down movement of the hollow frame 901. The hollow frame 901 is filled with an insulation block 902. The insulation block 902 is made of aerogel material, which has the characteristics of light weight and good insulation effect, and can make the hollow frame 901 have a floating function. A plurality of sealing protrusions 903 for sealing the mesh opening of the bearing net frame 6013 are constructed on the upper side of the hollow frame 901, which are used to increase the contact area between the hollow frame 901 and the bearing net frame 6013 to improve the sealing performance. Both side ends of the hollow frame 901 are fixedly connected with a sealing protrusion 903 for resisting the oblique side plate 6012 It should be noted that the space formed between the two oblique side panels 6012 is a trapezoidal shape that is wide at the top and narrow at the bottom. Under normal circumstances, the hollow frame 901 will fall autonomously to the opposite surfaces of the two oblique side panels 6012 under the action of gravity, and the hollow frame 901 is limited by the resistance of the trapezoidal block 904 to the oblique side panels 6012, so that the hollow frame 901 is located in the middle position of the oblique side panels 6012. At this time, the length of the hollow frame 901 to the gap between the two ends and the sealing end plate 703 can be connected with the space on the upper side of the grid mesh plate 6011, so as to ensure the circulation of gas between the middle cavity 502 and the lower cavity 503. When the hollow frame 901 moves up to the bearing mesh frame 6013, the bearing mesh frame 6013 will be completely sealed to form an isolation effect.

[0026] like Figure 8-Figure 9As shown, in some embodiments, the support frame 602 includes a support vertical plate 6021 fixedly connected to the upper ends of the two oblique side plates 6012, and the support vertical plate 6021 forms a skeleton inside the curved tank wall 7 to support the inside of the curved tank wall 7. The support vertical plate 6021 is arrayed with a plurality of through openings 6022 arranged opposite to the sealed inspection door 701. When a person enters the curved tank wall 7 through the sealed inspection door 701, he needs to pass through the through openings 6022 to enter the fuel chamber. A transition space is formed between the support vertical plate 6021 and the curved tank wall 7 to prevent the person from directly contacting the fuel chamber, thereby increasing the safety of the person's operation after entering. The upper end of the support plate 6021 abuts against the arc tank wall 7, a support top plate 6023 is connected between the tops of the two support vertical plates 6021, a plurality of column tubes 6024 distributed on both sides of the upper surface of the support top plate 6023 are connected between the support top plate 6023 and the bearing net frame 6013, two symmetrical and inclined guide slopes 6025 are arranged downward toward the column tubes 6024, a vent hole 6026 is arranged in the middle of the support top plate 6023, a guide umbrella cover 10 for covering the vent hole 6026 is installed on the support top plate 6023, an air suction and water injection pipeline 702 is arranged just above the guide umbrella cover 10, and the support top plate 6023 is mainly used to separate the upper cavity 501 from the middle cavity 501. The air vent 6026 on the cavity 502 is used as a connecting part. When the gas in the curved tank wall 7 needs to circulate, the airflow in the cabin 1 passes through the bottom guide groove 4 and the grid mesh plate 6011 into the lower cavity 503, and then enters the middle cavity 502 through the gaps at both ends of the sealing bottom plate 9 and the bearing mesh frame 6013, and then enters the upper cavity 501 through the through-hole 6022 and the air vent 6026, and finally discharges the cabin 1 through the air suction and water injection pipe 702, so that the gas flows through the fuel chamber from the bottom, effectively cools the fuel chamber with air, and also ensures the ventilation effect and increases safety. When the temperature in the fuel chamber is too high, the air suction and water injection can be used. The pipe 702 closes the ventilation part and opens the water injection part, so that the water flows into the upper cavity 501, and is blocked by the guide umbrella cover 10 to avoid directly entering the vent 6026. The water flows through the guide slope 6025 to the column tube 6024, and flows directly into the lower cavity 503 along the column tube 6024, and finally flows out from the bottom guide groove 4. It can be connected to a pipe connected to the air intake and water injection pipe 702 through the bottom guide groove 4, or it can be directly discharged to the sea. The continuous circulation of water can make multiple column tubes 6024 quickly absorb the surrounding heat, thereby achieving a cooling effect. Compared with air cooling, water cooling has a higher cooling effect, which ensures the safety of the fuel chamber.

[0027] like Figure 5 and Figure 8As shown, in some embodiments, the air suction and water injection pipeline 702 includes a plurality of vertical pipes 7021 fixedly connected to the top of the arc-shaped tank wall 7, and a converging cross pipe 7022 is connected between the tops of the plurality of vertical pipes 7021, and an air extraction pipe 7023 and a water adding pipe 7024 are connected to the converging cross pipe 7022, the air extraction pipe 7023 is connected to the vacuum pump, and the water adding pipe 7024 is connected to the water pump, and control valves 7025 are installed in the air extraction pipe 7023 and the water adding pipe 7024, and the converging cross pipe 7022 is used to connect the plurality of vertical pipes 7021 together, so that the vertical pipe 7021 can be used as both an air inlet end and a water outlet pipe, and the switching between the two states can be realized by controlling the opening and closing of the air extraction pipe 7023 and the water adding pipe 7024 by the control valve 7025, thereby increasing convenience, and at the same time, using the vertical pipe 7021 as a two-way interface can greatly reduce the space occupied by the pipeline and improve space utilization.

[0028] like Figure 6-Figure 7As shown, in some embodiments, the opposite sides of the two supporting vertical plates 6021 are constructed with a limiting horizontal bar 60211 located in the middle of the through hole 6022, and the sealing top plate 8 includes a horizontal frame 801 that is slidably sleeved on the column tube 6024, and the horizontal frame 801 is filled with a lightweight block 802, and the lightweight block 802 is also made of aerogel material to ensure the overall lightweight structure of the horizontal frame 801. The bottom of the horizontal frame 801 is against the limiting horizontal bar 60211, and the top of the horizontal frame 801 is constructed with a piston column block 802 for blocking the vent hole 6026. 03, the limiting horizontal bar 60211 is used as a limiting structure for the horizontal frame 801. When the horizontal frame 801 is on the limiting horizontal bar 60211, the horizontal frame 801 is in the middle of the through hole 6022. Therefore, the through hole 6022 is used as a connecting part between the upper cavity 501 and the middle cavity 502, which can facilitate the circulation of air. When the horizontal frame 801 moves upward, the piston column block 803 blocks the vent hole 6026, and cooperates with the sealing bottom plate 9 to block the bearing mesh frame 6013 to achieve isolation of the middle cavity 502. In addition, it should be noted that the sealing top plate 8 and the sealing bottom plate 9 have two driving states, one of which is that an electric push rod can be installed on the sealing top plate 8 and the sealing bottom plate 9, and the electric power is used to drive the two to move up and down to achieve isolation operation. The other is a powerless state. In this state, no driving parts are set on the sealing top plate 8 and the sealing bottom plate 9, and the vacuum pump on the exhaust pipe 7023 is used to quickly suck the gas in the upper cavity 501, the middle cavity 502 and the lower cavity 503. The gap is much smaller than the gap between the through-hole 6022 and the sealing top plate 8. At the same time, the weight of both is relatively light. By utilizing the reduction in air pressure, the sealing bottom plate 9 will first move up, thereby sealing the supporting mesh frame 6013. At this time, the air pressure in the middle cavity 502 will decrease rapidly, and the sealing top plate 8 will also move up until the supporting top plate 6023 is sealed. At this time, the middle cavity 502 will be in a negative pressure isolation state. On the one hand, it can isolate the leakage of fuel, and on the other hand, it can use the low oxygen environment to reduce the risk of accidental combustion of fuel and increase safety.

[0029] like Figure 6 and Figure 8 As shown, an embodiment of the present application proposes a fuel leakage detection device for the above-mentioned fuel tank, comprising: The detection unit 11 includes a directional guide cavity 1101 constructed in the bottom guide groove 4, the directional guide cavity 1101 is connected with a guide pipe 1102 which is inclined upward and connected with both sides of the arc tank wall 7, the end of the guide pipe 1102 is connected with the lower cavity 503 of the arc tank wall 7 and is located on the upper side of the sealing bottom plate 9, and a fuel detection pump 1103 is installed in the guide pipe 1102. The guide pipe 1102 is arranged on the upper side of the sealing bottom plate 9 in the lower cavity 503, so that the sealing bottom plate 9 can receive the leaked fuel, and then guide it into the guide pipe 1102, and finally into the directional guide cavity 1101, which is isolated from the rest of the bottom guide grooves 4, and the liquid fuel is collected separately to prevent the liquid fuel from leaking to the outside, thereby increasing safety; The guide collection member 12 is installed in the guide umbrella cover 10. The guide umbrella cover 10 can be used to collect fuel carried in the ventilation airflow, reduce the probability of fuel entering the air intake and water injection pipe 702, avoid corrosion of the fuel, increase safety, and at the same time, an air detection device can be installed therein to increase detection accuracy.

[0030] like Figure 6 and Figure 8 As shown, in some embodiments, the guide umbrella cover 10 includes a plurality of support rods 1001 distributed in an array along the circumferential side of the vent 6026, and an arc-shaped cover plate 1002 is fixedly connected to the top of the support rod 1001, and the edge of the arc-shaped cover plate 1002 is located outside the vent 6026. The guide collection piece 12 includes a multi-stage filter 1201 filled in the arc-shaped cover plate 1002 and used to filter the fuel. The ventilation airflow will first hit the inner arc surface of the arc-shaped cover plate 1002 through the vent 6026, and then the multi-stage filter 1201 will be used to filter the gas to separate the fuel carried therein, and then gradually gather and drip onto the upper surface of the support top plate 6023 through the edge of the inner arc surface, and then flow into the column tube 6024, and finally guide to the guide tube 1102 through the sealing bottom plate 9, and finally gather into the directional guide cavity 1101 to avoid leakage to the outside and increase safety.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A container ship fuel tank, characterized in that: include: The cabin is composed of an inner shell, an intermediate layer and an outer shell; The isolation layer is arranged on the inner wall of the inner shell and is made of corrosion-resistant elastic material and coated with an anti-permeability coating on the surface; The protective structure is distributed on the top and side walls of the cabin, including multiple sets of transverse stiffeners and longitudinal support beams to form a grid-like compression-resistant frame; Bottom guide grooves, which are in multiple numbers and extend longitudinally along the bottom of the cabin; The fuel compartment frame comprises a rectangular steel frame fixedly mounted on the inner bottom of the inner shell, in which the fuel chamber is mounted, a curved tank wall is mounted on the rectangular steel frame, the rectangular steel frame divides the curved tank wall into an upper cavity, a middle cavity and a lower cavity, a plurality of sealed inspection doors connected to the middle cavity are arrayed on the curved tank wall, an air intake and water injection pipe connected to the upper cavity is mounted on the top of the curved tank wall, a sealed top plate movable up and down in the middle cavity is mounted on the top of the rectangular steel frame, and a sealed bottom plate movable up and down in the lower cavity is mounted on the bottom of the rectangular steel frame.

2. A container ship fuel tank according to claim 1, characterized in that: The middle layer is a honeycomb reinforcement structure filled with impact-resistant composite materials, and a temperature sensor is embedded in the honeycomb structure of the middle layer.

3. A container ship fuel tank according to claim 1, characterized in that: The rectangular steel frame includes a leaking bottom frame installed in the lower cavity, to which a supporting frame is fixedly connected, and the upper cavity is constructed between the top of the supporting frame and the arc-shaped tank wall, and both ends of the arc-shaped tank wall are constructed with sealing end plates for sealing the leaking bottom frame and the supporting frame in the length direction.

4. A container ship fuel tank according to claim 3, characterized in that: The leakage bottom frame includes a grille mesh plate whose bottom is fixedly connected to the bottom of the inner shell, and both sides of the grille mesh plate are constructed with inclined side panels arranged inclined upward, and a bearing mesh frame is fixedly connected between the upper ends of the two inclined side panels, and the bottom of the bearing mesh frame is constructed with a plurality of columns connected to the upper surface of the grille mesh plate, and the sealing bottom plate is slidably sleeved on the columns.

5. A container ship fuel tank according to claim 4, characterized in that: The sealing bottom plate includes a hollow frame that is slidably sleeved on the column. The length of the hollow frame has gaps between the two ends and the sealing end plates. The hollow frame is filled with insulation blocks. The upper side of the hollow frame is configured with a plurality of sealing protrusions for sealing the mesh opening of the bearing mesh frame. Both side ends of the hollow frame are fixedly connected with trapezoidal blocks for resisting the oblique side plates.

6. A container ship fuel tank according to claim 5, characterized in that: The support frame includes a support vertical plate fixedly connected to the upper ends of two oblique side plates, the support vertical plate is arrayed with a plurality of through openings arranged opposite to the sealed inspection door, the upper ends of the support vertical plates are in contact with the arc-shaped tank wall, a support top plate is connected between the tops of the two support vertical plates, a plurality of column tubes distributed on both sides of the upper surface of the support top plate are penetrated and connected between the support top plate and the bearing mesh frame, the top of the support top plate is constructed with two symmetrical and inclined guide slopes arranged downward toward the column tubes, a vent is constructed in the middle of the support top plate, a guide umbrella cover for covering the vent is installed on the support top plate, and the air suction and water injection pipes are arranged directly above the guide umbrella cover.

7. A container ship fuel tank according to claim 1, characterized in that: The air suction and water injection pipeline includes a plurality of vertical pipes fixedly connected to the top of the arc-shaped tank wall, a converging cross pipe is connected between the tops of the plurality of vertical pipes, an air extraction pipe and a water adding pipe are connected to the converging cross pipe, the air extraction pipe is connected to the vacuum pump, the water adding pipe is connected to the water pump, and control valves are installed in the air extraction pipe and the water adding pipe.

8. A container ship fuel tank according to claim 6, characterized in that: The opposite sides of the two supporting vertical plates are constructed with limiting horizontal bars located in the middle of the through-hole, and the sealing top plate includes a horizontal frame slidably sleeved on the column tube, the horizontal frame is filled with lightweight blocks, the bottom of the horizontal frame is in contact with the limiting horizontal bar, and the top of the horizontal frame is constructed with a piston column block for sealing the vent hole.

9. A fuel leakage detection device for a fuel tank as claimed in any one of claims 1 to 8, characterized in that: include: The detection unit comprises a directional flow guiding cavity constructed in the bottom flow guiding groove, wherein the directional flow guiding cavity is connected with a flow guiding pipe which is inclined upward and connected with two sides of the arc-shaped tank wall, wherein the end of the flow guiding pipe is connected with the lower cavity of the arc-shaped tank wall and is located on the upper side of the sealing bottom plate, and a fuel detection pump is installed in the flow guiding pipe; The diversion collecting component is installed in the diversion umbrella cover.

10. A fuel leak detection device according to claim 9, characterized in that: The guide umbrella cover includes a plurality of support rods distributed in an array along the circumferential side of the vent hole, the top of the support rods is fixedly connected with an arc-shaped cover plate, the edge of the arc-shaped cover plate is located outside the vent hole, and the guide collection piece includes a multi-stage filter screen filled in the arc-shaped cover plate and used for filtering fuel.

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