1. An LNG-powered vessel, comprising:

a hull;

a tank comprising a frame and a tank body for loading LNG; the bottom of the frame is provided with a plurality of mounting parts arranged at intervals;

a plurality of connecting mechanisms provided corresponding to the plurality of mounting portions; each connecting mechanism comprises a base fixed on the deck, a heat insulating layer positioned at the top of the base and a connecting piece; the heat insulation layer can isolate cold energy transmission; the connecting piece with the pedestal connection, the upper portion of connecting piece is passed the heat insulation layer to constitute connecting portion, connecting portion with the connection can be dismantled to the installation department.

2. The LNG-powered vessel of claim 1, wherein the frame has corner pieces with through holes formed therein, the through holes constituting the mounting portions;

the connecting piece comprises a lock head seat and a lock head, and the lock head forms the connecting part;

the lock head can rotate relative to the lock head seat so as to have an opening state and a closing state, and when the lock head is in the opening state, the lock head can extend into the through hole; when the lock head is in a closed state, the lock head is locked with the corner fitting, and then the frame is detachably connected with the connecting piece.

3. The LNG-powered ship of claim 2, wherein the base has an accommodating space therein, the heat insulating layer has a through hole formed therein for the lock head to pass through, the through hole communicating with the accommodating space, the lock head is seated in the accommodating space, and the lock head has the through hole extending upward beyond the heat insulating layer;

the heat insulation layer is provided with a groove with an upward opening, the groove is communicated with the through hole, and the groove is matched with the corner fitting so that the corner fitting is positioned in the groove.

4. The LNG-powered ship of claim 1, wherein the thermal insulation layer is made of glass fiber reinforced plastic;

the thickness of the heat insulation layer is 10 mm-20 mm.

5. The LNG-powered vessel of claim 1, further comprising:

the longitudinal limiting mechanisms are arranged in pairs at intervals along the longitudinal direction of the ship body, can approach each other and abut against two opposite ends of the frame, and further limit the longitudinal movement of the frame along the ship body;

the transverse limiting mechanisms are arranged in pairs at intervals along the transverse direction of the ship body, can approach each other and are abutted against two opposite sides of the frame, and then the frame is limited to move along the transverse direction of the ship body.

6. The LNG-powered vessel of claim 5, wherein each longitudinal stop mechanism comprises:

the longitudinal limiting seat is fixed on the ship body;

the longitudinal limiting piece is arranged on the longitudinal limiting seat and can move along the longitudinal direction of the ship body relative to the longitudinal limiting seat; the longitudinal limiting piece is upwards beyond the heat insulation layer;

each horizontal stop gear includes:

the transverse limiting seat is fixed on the ship body;

the transverse limiting piece is arranged on the transverse limiting seat and can move along the transverse direction of the ship body relative to the transverse limiting seat; the lateral limiting piece is upward beyond the heat insulation layer.

7. The LNG powered vessel of claim 6, wherein the longitudinal restraint mechanism and the transverse mechanism are arranged in pairs, and the longitudinal restraint seat and the transverse restraint seat arranged in pairs are fixedly connected.

8. The LNG-powered ship according to claim 6, wherein each of the longitudinal and transverse limiting seats has a limiting hole, an internal thread is provided in the limiting hole, each of the longitudinal and transverse limiting members has a rod shape, and an external thread adapted to the internal thread is provided on an outer circumference of each of the longitudinal and transverse limiting members.

9. The LNG-powered vessel according to claim 6, characterized in that the longitudinal and transverse stops each comprise:

a stopper movable away from the frame or close to and abutting against the frame;

and the air cylinder is connected with the limiting block to drive the limiting block to move.

10. The LNG-powered vessel of claim 1, further comprising a displacement detector and an alarm electrically connected to the displacement detector;

the displacement detector is used for detecting the displacement of the frame, and when the displacement of the frame is larger than a preset value, the alarm receives that the displacement of the frame is larger than the preset value and outputs an alarm signal outwards.

11. The LNG-powered vessel according to claim 10, wherein the displacement detector is provided on the hull and is movable into abutment with the frame.

Background

Liquefied Natural Gas (LNG) has become the first choice of green energy for future ships as an economical, green and safe novel energy source.

The LNG powered ship is a ship using LNG as an energy source, and in the LNG powered ship, LNG is generally stored in a fuel tank, and when the LNG in the fuel tank is used up, the LNG powered ship needs to be specially filled in a gas station, which results in a delay to some extent. Moreover, the number of LNG water filling pontoon used for building at present is limited and uneven, the fuel filling of the LNG power ship on the ocean mainly adopts a shore-based tank car wharf filling mode, the filling time is long, and the potential safety hazard is high, so that the large-scale application of the LNG power ship is severely restricted.

Disclosure of Invention

The invention aims to provide an LNG power ship with a fuel tank for tank changing, filling, stacking and expanding, which aims to solve the problems in the prior art.

In order to solve the above technical problem, the present invention provides an LNG-powered ship, including:

a hull;

a tank comprising a frame and a tank body for loading LNG; the bottom of the frame is provided with a plurality of mounting parts arranged at intervals;

a plurality of connecting mechanisms provided corresponding to the plurality of mounting portions; each connecting mechanism comprises a base fixed on the deck, a heat insulating layer positioned at the top of the base and a connecting piece; the heat insulation layer can isolate cold energy transmission; the connecting piece with the pedestal connection, the upper portion of connecting piece is passed the heat insulation layer to constitute connecting portion, connecting portion with the connection can be dismantled to the installation department.

In one embodiment, the frame has a corner piece, the corner piece has a through hole, and the through hole forms the mounting part;

the connecting piece comprises a lock head seat and a lock head, and the lock head forms the connecting part;

the lock head can rotate relative to the lock head seat so as to have an opening state and a closing state, and when the lock head is in the opening state, the lock head can extend into the through hole; when the lock head is in a closed state, the lock head is locked with the corner fitting, and then the frame is detachably connected with the connecting piece.

In one embodiment, the base has a receiving space therein, the heat insulating layer is provided with a through hole for the lock head to pass through, the through hole is communicated with the receiving space, the lock head is located in the receiving space, and the lock head passes through the through hole and protrudes upwards beyond the heat insulating layer;

the heat insulation layer is provided with a groove with an upward opening, the groove is communicated with the through hole, and the groove is matched with the corner fitting so that the corner fitting is positioned in the groove.

In one embodiment, the material of the heat insulating layer is glass fiber reinforced plastic;

the thickness of the heat insulation layer is 10 mm-20 mm.

In one embodiment, the LNG-powered vessel further comprises:

the longitudinal limiting mechanisms are arranged in pairs at intervals along the longitudinal direction of the ship body, can approach each other and abut against two opposite ends of the frame, and further limit the longitudinal movement of the frame along the ship body;

the transverse limiting mechanisms are arranged in pairs at intervals along the transverse direction of the ship body, can approach each other and are abutted against two opposite sides of the frame, and then the frame is limited to move along the transverse direction of the ship body.

In one embodiment, each of the longitudinal limiting mechanisms includes:

the longitudinal limiting seat is fixed on the ship body;

the longitudinal limiting piece is arranged on the longitudinal limiting seat and can move along the longitudinal direction of the ship body relative to the longitudinal limiting seat; the longitudinal limiting piece is upwards beyond the heat insulation layer;

each horizontal stop gear includes:

the transverse limiting seat is fixed on the ship body;

the transverse limiting piece is arranged on the transverse limiting seat and can move along the transverse direction of the ship body relative to the transverse limiting seat; the lateral limiting piece is upward beyond the heat insulation layer.

In one embodiment, the longitudinal limiting mechanism and the transverse mechanism are arranged in pairs, and the longitudinal limiting seat and the transverse limiting seat which are arranged in pairs are fixedly connected.

In one embodiment, the longitudinal limiting seat and the transverse limiting seat are both provided with limiting holes, internal threads are arranged in the limiting holes, the longitudinal limiting part and the transverse limiting part are both rod-shaped, and the peripheries of the longitudinal limiting part and the transverse limiting part are both provided with external threads matched with the internal threads.

In one embodiment, each of the longitudinal stopper and the lateral stopper includes:

a stopper movable away from the frame or close to and abutting against the frame;

and the air cylinder is connected with the limiting block to drive the limiting block to move.

In one embodiment, the LNG-powered vessel further comprises a displacement detector and an alarm electrically connected to the displacement detector;

the displacement detector is used for detecting the displacement of the frame, and when the displacement of the frame is larger than a preset value, the alarm receives that the displacement of the frame is larger than the preset value and outputs an alarm signal outwards.

In one embodiment, the displacement detector is provided on the hull and is movable to abut against the frame.

According to the technical scheme, the invention has the advantages and positive effects that:

the LNG power ship comprises a ship body, the tank and the connecting mechanism, and the connecting part of the connecting mechanism is detachably connected with the mounting part at the bottom of the tank, so that the LNG power ship can realize the purpose of quick filling in a tank replacing mode, and does not need to sail to a filling (wharf) ship or a shore-based filling station for filling, and long-time fuel supplement, thereby reducing the risk of refueling the LNG power ship, saving time and cost, improving the efficiency of refueling, saving time and improving efficiency. And when the tank needs to be maintained, the tank can be lifted to the shore and then operated, so that the operation of workers is facilitated.

Furthermore, the LNG power ship is further provided with a longitudinal limiting mechanism and a transverse limiting mechanism, so that the phenomenon that the ship body shakes to cause the tank box to displace is avoided, the connection strength between the tank box and the connecting mechanism is guaranteed, the connection between pipelines is protected, and the safety of the LNG power ship is further guaranteed.

Drawings

Fig. 1 is a partial front view of one embodiment of an LNG-powered vessel of the present invention.

Fig. 2 is a partial side view of one embodiment of the LNG-powered vessel of the present invention.

Fig. 3 is a schematic structural view of the connecting mechanism, the longitudinal limiting mechanism and the transverse limiting mechanism on the deck in fig. 2.

Fig. 4 is a partial top view of one embodiment of the LNG-powered vessel of the present invention.

Fig. 5 is a partial view of fig. 4.

The reference numerals are explained below: 1. an LNG powered vessel; 11. a deck; 12. a tank box; 121. a corner fitting; 13. a connecting mechanism; 131. a base; 132. a heat insulating layer; 133. a connecting member; 1331. a lock head seat; 1332. a lock head; 14. a longitudinal limiting mechanism; 141. a longitudinal limiting seat; 142. a longitudinal limit piece; 15. a transverse limiting mechanism; 151. a transverse limiting seat; 152. a lateral limit piece; 16. and a displacement detector.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.

The invention provides an LNG power ship. The LNG-powered ship may be a ship using only LNG as fuel, or a ship using LNG as a main fuel and diesel oil as an auxiliary fuel.

Referring to fig. 1, 2 and 4, the LNG-powered vessel 1 includes a hull, a tank 12, a connection mechanism 13, a gas supply mechanism, a longitudinal stop mechanism 14 and a transverse stop mechanism 15. Wherein, coupling mechanism 13 is fixed in on the hull to can dismantle with tank 12 and be connected, thereby make tank 12 can break away from the hull, realize tank 12's quick replacement, thereby practiced thrift tank 12's filling time. The longitudinal limiting mechanism 14 and the transverse limiting mechanism 15 respectively limit the tank 12 to move longitudinally and transversely on the ship body, and the use safety of the tank 12 is guaranteed.

For convenience of description, the length direction of the ship body is defined as a longitudinal direction, and the width direction of the ship body is defined as a transverse direction.

In particular, the top of the hull has a deck 11 open to the weather. The deck 11 is spaced apart from the bottom of the hull and forms an inner space, which is divided as required to form a cargo tank, a cabin, a ballast tank, and the like. Wherein, a propelling engine for burning LNG is arranged in the engine room to provide power to realize the navigation of the whole ship.

The gas supply mechanism is fixed on the ship body and is connected with the propulsion engine to supply LNG. In this embodiment, the gas supply mechanism has a female joint. This female joint adopts self sealss dry-type attach fitting, and it can self-sealing when the disconnection, and then prevents to reveal. And the female connector is disposed above the deck 11 to facilitate connection with the tank 12.

Tank box 12 includes a frame and a tank body. The tank body is used for loading LNG, and the frame is used for supporting the tank body.

In this embodiment, the longitudinal direction of the frame is parallel to the longitudinal direction of the hull. In other embodiments, the length direction of the frame may be perpendicular to the length direction of the hull.

The tank body is provided with a male joint matched with the female joint, so that the tank box 12 is quickly connected with the air supply mechanism. Specifically, the male connector employs a self-sealing dry connection connector that can be automatically closed when disconnected, thereby preventing leakage. Namely, the tank 12 and the gas supply mechanism are connected through the quick connection of the male joint and the female joint, and the male joint and the female joint can be automatically closed when disconnected, so that leakage can be prevented.

The tank body and the air supply mechanism on the ship body are connected in a quick-disassembling mode through the male connector and the female connector, time is saved, and efficiency is improved. And the operation is simple.

The frame comprises two end frames arranged in parallel at intervals and a side beam for connecting the two end frames. Wherein, the end frame is square, and it includes two corner posts, the end upper beam and the end underbeam of connecting the corner post that parallel interval set up to and corner fittings 121. The corner posts, the end upper beam and the end lower beam are connected by corner pieces 121 to form a square structure, i.e., an end frame.

The corner fitting 121 is a rectangular cube structure with a hollow interior, and a through hole is formed in the corner fitting 121. In this embodiment, the through hole is substantially elliptical.

The through hole constitutes the mounting portion of the frame. In this embodiment, four bottom corners of the frame are provided with corner fittings 121, i.e., four corners of the frame are provided with mounting portions.

The corner fitting 121 at the top of the frame can be used for hoisting, thereby facilitating the replacement of the tank 12 as a whole.

Specifically, the tank 12 is designed and manufactured to meet both IMDG and IGF specification requirements, with the dual functionality of an amphibious and marine fuel tank.

The plurality of connection mechanisms 13 are provided corresponding to the plurality of mounting portions. That is, in the present embodiment, the number of the connecting mechanisms 13 is four.

The connection mechanism 13 is used to achieve a detachable connection between the tank 12 and the main deck 11, and thus to achieve a quick replacement of the tank 12. Referring to fig. 3, each of the connection mechanisms 13 includes a base 131, an insulating layer 132, and a connection member 133.

The base 131 is fixed to the deck 11. Specifically, the base 131 is hollow and has an accommodating space, and the top of the base 131 is provided with an avoiding hole, which is communicated with the accommodating space.

An insulating layer 132 is disposed on top of the base 131. Specifically, the material of the heat insulating layer 132 is glass fiber reinforced plastic. The thickness of the heat insulating layer is 10 mm-20 mm, and can be set according to the actual situation.

The insulating layer 132 is provided with a groove with an upward opening, and the shape and the size of the groove are matched with those of the corner piece 121, so that the corner piece 121 is positioned in the groove, and the corner piece 121 is positioned. Therefore, the heat insulating layer 132 can prevent the cold energy leaked from the tank from being transmitted to the deck 11 and can prevent the tank 12 from colliding with the base 131 when the hull is rocked.

The insulation layer 132 is also provided with perforations through the top to the bottom and which communicate with the grooves.

The connector 133 is positioned in the receiving space of the base 131, and the top of the connector 133 protrudes upward beyond the insulating layer 132 and upward beyond the insulating layer 132.

Specifically, the connector 133 includes a lock head seat 1331 and a lock head 1332. The locking head seat 1331 is partially located in the receiving space and partially located in the groove.

The lock 1332 is rotatably coupled to the lock 1331 to have an open state and a closed state. The lock 1332 constitutes a connecting portion of the connecting mechanism 13.

Specifically, the locking head 1332 has a substantially flat hemispherical shape, and when in the open state, the locking head 1332 can be smoothly inserted into the corner piece 121 through the through hole. The locking head 1332 is rotated so that the locking head 1332 can not move out of the through hole any more, and at the same time, the locking head 1332 is in a closed state.

The detachable connection between the frame and the connecting mechanism 13 is realized through the detachable connection between the corner piece 121 and the lock head 1332, and further, the detachable connection between the tank 12 and the deck 11 is realized.

In this embodiment, the top of the lock 1332 extends upward beyond the top of the lock 1331, allowing the lock 1332 to engage the corner fitting 121. And the locking head seat 1331 provides a supporting force in the radial direction of the locking head 1332. The bottom of the lock 1332 extends downward beyond the bottom of the lock seat 1331. The bottom of the lock 1332 is connected to a drive member that drives the lock 1332 to rotate relative to the lock seat 1331. Illustratively, the driver may be a rotary cylinder.

The longitudinal limiting mechanism 14 and the transverse limiting mechanism 15 are used for limiting the tank 12 to move on the hull in the longitudinal direction and the transverse direction, so that damage to the connecting mechanism 13, the male connector and the female connector caused by displacement when the hull shakes is avoided, and the safety of the LNG powered ship 1 is guaranteed.

Referring to fig. 4, the longitudinal limiting mechanisms 14 are arranged in pairs, and the longitudinal limiting mechanisms 14 arranged in pairs are arranged at intervals along the longitudinal direction of the hull and are respectively arranged at two ends of the frame. The longitudinal stop mechanisms 14 provided in pairs can be brought close to each other to abut against the opposite ends of the frame, thereby limiting the longitudinal movement of the frame along the hull.

Similarly, the transverse limiting mechanisms 15 are also arranged in pairs, and the transverse limiting mechanisms 15 arranged in pairs are arranged at intervals along the transverse direction of the ship body and are respectively arranged on two sides of the frame. The paired lateral limiting mechanisms 15 can approach each other and abut against the opposite sides of the frame, thereby limiting the lateral movement of the frame along the hull.

In this embodiment, the longitudinal limiting mechanisms 14 have two pairs, and the two pairs of longitudinal limiting mechanisms 14 are arranged at intervals in the transverse direction. Namely, a longitudinal limiting mechanism 14 is respectively arranged at four corners of the bottom of the frame.

The transverse limiting mechanisms 15 are also two pairs, and the two pairs of transverse limiting mechanisms 15 are arranged at intervals along the transverse direction. Namely, a transverse limiting mechanism 15 is respectively arranged at four corners of the bottom of the frame.

Specifically, referring to fig. 3 and 5, the longitudinal limiting mechanism 14 includes a longitudinal limiting seat 141 and a longitudinal limiting member 142.

The longitudinal limiting seat 141 is fixed on the deck 11 of the ship body. Specifically, in the present embodiment, the longitudinal position-limiting seat 141 is disposed outside the base 131. The inside and outside are referred to the tank 12, and the direction toward the area enclosed by the two end frames is the inside, otherwise the direction is the outside.

The longitudinal restraint seat 141 extends upwardly beyond the insulation layer 132 of the connection mechanism 13.

The longitudinal stopper 142 is disposed on the longitudinal stopper seat 141, and is capable of moving in the longitudinal direction of the hull relative to the longitudinal stopper seat 141. And the longitudinal stoppers 142 extend upward beyond the insulating layer 132 and can abut against the corner members 121 of the frame.

Illustratively, a limiting hole is formed in a part of the longitudinal limiting seat 141, which exceeds the heat insulating layer 132 upwards, and an internal thread is formed on the inner periphery of the limiting hole. The longitudinal stopper 142 is rod-shaped, and has an external thread fitted to the internal thread on the outer periphery thereof. The movement of the longitudinal limiting member 142 is realized by the matching of the external thread and the internal thread on the longitudinal limiting member 142, so that the longitudinal limiting member 142 abuts against the corner member 121.

The transverse limiting seat 151 is fixed on the deck 11 of the ship body. Specifically, in the present embodiment, the lateral restraining seat 151 is disposed outside the base 131. The inside and outside are referred to the tank case 12, and the direction toward the region enclosed by the side members is the inside, whereas the opposite is the outside.

The lateral restraint base 151 extends upwardly beyond the thermal insulation 132 of the connection 13.

The lateral limiting member 152 is disposed on the lateral limiting seat 151 and is capable of moving in the lateral direction of the hull relative to the lateral limiting seat 151. And the lateral stop 152 extends upwardly beyond the insulator 132 and is able to abut against the corner fitting 121 of the frame.

Illustratively, a portion of the lateral limiting seat 151 that extends upward beyond the thermal insulation layer 132 is provided with a limiting hole, and an inner periphery of the limiting hole is provided with an internal thread. The lateral retainer 152 is rod-shaped, and has an external thread fitted to the internal thread on its outer periphery. The movement of the lateral limiting member 152 is realized by the matching of the external thread and the internal thread on the lateral limiting member 152, so that the lateral limiting member 152 abuts against the corner member 121.

Specifically, the longitudinal limiting mechanism 14 and the transverse mechanism are arranged in pairs, and the longitudinal limiting seat 141 and the transverse limiting seat 151 which are arranged in pairs are fixedly connected. That is, the longitudinal stopper 141 and the lateral stopper 151 are provided in pairs at each corner of the frame, and are fixedly connected to each other to form an L-shape. The connection between the longitudinal limiting seat 141 and the transverse limiting seat 151 enhances the strength of the two.

In other embodiments, the longitudinal limiting member 142 may further include a limiting block and a cylinder for driving the limiting block to move. The stopper can be close to the corner fitting 121 of the frame and abut against the corner fitting 121 or be away from the corner fitting 121. Similarly, the lateral limiting member 152 may also include a limiting block and an air cylinder for driving the limiting block to move. Wherein, the cylinder can also be changed into explosion-proof motor, and the drive through the motor makes the stopper remove.

Further, the LNG-powered vessel 1 further comprises a displacement detector 16 and an alarm electrically connected to the displacement detector 16. The displacement detector 16 is used for detecting the displacement of the frame, and when the displacement of the frame is larger than a preset value, the displacement detector 16 sends a signal that the displacement of the frame is larger than the preset value to the alarm. The alarm receives the signal and outputs an alarm signal to the outside.

The displacement detector 16 is provided on the hull and is movable to abut against the frame. Referring to fig. 3, the displacement detector 16 is disposed on the longitudinal stopper 141 and extends upward beyond the thermal insulation layer 132. And the displacement detector 16 is movable in the longitudinal direction so as to be able to move away from the corner piece 121 of the frame and enable the tank 12 to be able to be hoisted or brought close to and into abutment with the corner piece 121 of the frame and detect the displacement of the tank 12. In other embodiments, the displacement detector 16 may also be disposed on the lateral restraint base 151.

Wherein the displacement comprises a lateral displacement and a longitudinal displacement. After the tank 12 is lifted to the hull and connected to the connecting mechanism 13, and the hull does not shake, the displacement detected by the displacement detector 16 is set as the starting point, that is, the horizontal coordinate is 0, and the vertical coordinate is also 0. When the tank 12 moves due to the shaking of the ship body and displacement occurs, the displacement detected by the displacement detector 16 changes, and when the displacement exceeds a preset value, a signal is sent to an alarm, and the alarm sends out an alarm signal.

When the LNG powered ship 1 in this embodiment is underway, the lock 1332 is in a closed state, the connecting mechanism 13 is fixedly connected to the tank 12, and the longitudinal limiting mechanism 14 and the transverse limiting mechanism 15 perform transverse and longitudinal limiting on the tank 12, thereby preventing the damage to the pipeline and the connecting mechanism 13 caused by the shaking of the ship body. Meanwhile, the displacement detector 16 detects the displacement of the tank 12, and the alarm gives an alarm signal when the displacement is greater than a preset value.

When the LNG fuel in the tank body is about to be used up, the LNG-powered vessel 1 is docked at the dock, the lock head 1332 is rotated to an open state, the longitudinal and transverse limiting mechanisms 14 and 15 are adjusted to release the abutment with the corner piece 121, the tank 12 is removed from the hull by lifting, and a tank 12 filled with LNG is replaced onto the hull, so that the lock head 1332 extends into the corner piece 121, and the lock head 1332 is rotated to a closed state. The longitudinal stop mechanism 14 and the lateral stop mechanism 15 are then adjusted to abut against the corner pieces 121, thereby limiting the movement of the tank 12. At this time, the LNG-powered vessel 1 may continue to sail.

In addition, when the tank 12 on the hull is out of order and needs to be repaired or maintained, the tank 12 can be removed from the hull, and one tank 12 can be hoisted to the hull again, so that the LNG-powered ship 1 can continue to sail. The tank 12 requiring repair or maintenance is then repaired or maintained onshore.

According to the technical scheme, the invention has the advantages and positive effects that:

the LNG power ship comprises a ship body, a tank and a connecting mechanism, wherein the connecting part of the connecting mechanism is detachably connected with the mounting part at the bottom of the tank, so that the LNG power ship can realize the purpose of quick filling in a tank replacing mode without sailing to a filling (wharf) ship or a shore-based filling station for filling or long-time fuel replenishment, thereby reducing the risk of refueling the LNG power ship, saving time and cost and improving the efficiency of refueling. And when the tank needs to be maintained, the tank can be lifted to the shore and then operated, so that the operation of workers is facilitated.

Furthermore, the LNG power ship is further provided with a longitudinal limiting mechanism and a transverse limiting mechanism, so that the phenomenon that the ship body shakes to cause the tank box to displace is avoided, the connection strength between the tank box and the connecting mechanism is guaranteed, the connection between pipelines is protected, and the safety of the LNG power ship is further guaranteed.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.