Automatic butt-joint connecting device for ammonia fuel filling between ships

Abstract

The invention relates to the technical field of ammonia fuel filling, and provides an ammonia fuel filling automatic butt joint connecting device between ships, which comprises a liquid receiving end module, a liquid receiving end module, a liquid receiving end module and a liquid receiving end module, the liquid feeding end module is provided with a photosensitive sensor, and the photosensitive sensor is matched with the laser transmitter to perform initial positioning; the hydraulic auxiliary butt-joint system is connected between the liquid feeding end module and the ammonia fuel filling ship, and the hydraulic auxiliary butt-joint system drives the liquid feeding end module to be communicated with or separated from the liquid receiving end module; and one end of the positioning mechanical arm assembly is connected to the hydraulic auxiliary butt joint system, the other end of the positioning mechanical arm assembly is tightly attached to the liquid containing end module, the position of the liquid containing end module is corrected, and accurate centering is achieved. According to the automatic butt-joint connecting device for ammonia fuel filling between the ships, manual intervention is not needed in the whole process, and safety is high; operation is simple, and efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic filling of ammonia fuel, in particular to a kind of automatic docking connecting device for ammonia fuel filling between ships. BACKGROUND

[0002] With the global shipping industry accelerating low-carbon emission reduction, the clean energy market to replace traditional marine fuel is expanding and diversifying. At the same time, the increasingly stringent emission regulations of the International Maritime Organization (IMO) have jointly promoted ammonia fuel, hydrogen fuel, methanol fuel and other zero-carbon or low-carbon fuels to become the core choice of future ship power. Among them, ammonia fuel has a particularly broad application prospect in large ocean-going ships due to its carbon-free characteristics, mature production and storage infrastructure, and high volumetric energy density. This trend will inevitably lead to an urgent need for ship ammonia fuel filling technology and equipment, especially the Ship-to-Ship (STS) filling mode.

[0003] However, the strong corrosiveness and toxicity of ammonia fuel pose much stricter requirements for its filling safety than liquefied natural gas. Its characteristics not only challenge the compatibility of sealing materials, but also require the system to achieve an absolute "zero leakage" standard to ensure the safety of crew and the environment. At the same time, the medium-pressure storage conditions of liquid ammonia and its different temperature zone (-33°C) than LNG mean that LNG-based technical solutions cannot be directly applied and a dedicated safety protection system must be developed.

[0004] Currently, no technical solution for ship ammonia fuel filling devices has been found, although there are some ship filling connectors and related patents for LNG, such as the prior art patent with application number CN202510567771.7, which discloses a multifunctional integrated ship LNG filling device, and the patent with application number CN202411117307.X, which discloses a multifunctional integrated ship LNG filling device. However, these technical solutions have two major gaps when applied to ammonia fuel Ship-to-Ship filling: first, most existing patents lack true "automatic docking" capability. They usually rely on manual operation by crew or auxiliary machinery for coarse alignment and connection, which is inefficient and extremely risky in rough sea conditions, making it difficult to meet the needs of efficient commercial filling. Second and more importantly, the complexity of Ship-to-Ship "moving base" operations is severely overlooked. This is very different from the fixed base filling scenarios such as land-based or wharf-based, and existing designs have failed to solve the problem of complex relative motion between two ships under the action of wind, wave and current. They lack high-precision self-adaptive docking capability and solutions to deal with ship sway during continuous filling and achieve safe emergency breakaway, posing a significant risk of leakage.

[0005] In summary, the existing ship clean energy filling device has no special filling technology for ammonia fuel, and does not consider the filling process under the dynamic base state between ships, and has problems such as relying on manual docking, complicated operation, poor safety, low efficiency and the like.

[0006] Therefore, the present application is proposed. SUMMARY

[0007] The present application aims to provide an automatic docking connection device for ammonia fuel filling between ships to solve the problems in the prior art that the existing ship clean energy filling device has no special filling technology for ammonia fuel, and does not consider the filling process under the dynamic base state between ships, and has problems such as relying on manual docking, complicated operation, poor safety, low efficiency and the like.

[0008] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0009] An automatic docking connection device for ammonia fuel filling between ships, comprising:

[0010] A liquid receiving end module connected with an ammonia fuel receiving ship, a laser emitter being arranged on the liquid receiving end module, the laser emitter being capable of emitting a laser signal;

[0011] A liquid feeding end module connected with an ammonia fuel filling ship, a photosensitive sensor being arranged on the liquid feeding end module, the photosensitive sensor being capable of receiving the laser signal emitted by the laser emitter, the photosensitive sensor cooperating with the laser emitter to perform initial positioning;

[0012] A hydraulic auxiliary docking system connected between the liquid feeding end module and the ammonia fuel filling ship, the hydraulic auxiliary docking system driving the liquid feeding end module and the liquid receiving end module to communicate or separate;

[0013] A positioning mechanical arm assembly, one end of the positioning mechanical arm assembly being connected to the hydraulic auxiliary docking system, the hydraulic auxiliary docking system being capable of providing power for movement of the positioning mechanical arm assembly, the other end of the positioning mechanical arm assembly being closely attached to the liquid receiving end module and correcting the position of the liquid receiving end module, so as to realize accurate centering of the liquid feeding end module and the liquid receiving end module.

[0014] Further, the positioning mechanical arm assembly comprises a positioning hydraulic cylinder, a mechanical connecting arm and an arc-shaped roller, one end of the positioning hydraulic cylinder is installed on the hydraulic auxiliary docking system, the other end of the positioning hydraulic cylinder is installed on the mechanical connecting arm; one end of the mechanical connecting arm is installed on the hydraulic auxiliary docking system, the arc-shaped roller is installed on the other end of the mechanical connecting arm, and the arc-shaped roller is closely attached to the liquid receiving end module.

[0015] Further, the automatic docking connection device for ammonia fuel filling between ships further comprises an ammonia pull-off valve, a front end of the ammonia pull-off valve is connected with the end of the hydraulic auxiliary docking system, and the end of the ammonia pull-off valve is connected with the ammonia fuel filling ship through a connecting hose.

[0016] Further, a sandwich channel is arranged on the hydraulic auxiliary docking system, a BOG inlet is arranged on the sandwich channel, the ammonia pull-off valve adopts a concentric double-wall pipe integrated structure, the ammonia pull-off valve comprises an inner-layer liquid ammonia flow channel and an outer-layer BOG backflow gas path jacket; the connecting hose is arranged in a double-layer structure, the connecting hose comprises an inner-layer channel and an outer-layer channel, the inner-layer channel and the outer-layer channel are communicated with the ammonia fuel filling ship, the sandwich channel is communicated with the BOG backflow gas path jacket and the outer-layer channel as an evaporation gas loop; during the ammonia fuel filling between ships, the evaporation gas generated by the ammonia fuel receiving ship enters the evaporation gas loop through the BOG inlet and is recycled to the ammonia fuel filling ship, so that a closed cycle is realized.

[0017] Further, the liquid feeding end module comprises a first shell, a guide rod, a spiral groove, a liquid feeding valve core and a sealing structure; the spiral groove is arranged at the inner rear end of the first shell, the front end of the guide rod is connected with the liquid feeding valve core, and the sealing structure is arranged at the front end of the liquid feeding valve core; the liquid receiving valve core, a spring, a cavity, a valve core base and a second shell are arranged in the liquid receiving end module; the cavity is formed in the inner part of the second shell, and the liquid receiving valve core is arranged in the cavity; the sealing structure is arranged at one end of the liquid receiving valve core, and the other end of the liquid receiving valve core is connected with the valve core base; the spring is sleeved outside the liquid receiving valve core,

[0018] The hydraulic auxiliary docking system can drive the guide rod to rotate and move along the spiral groove, so as to drive the liquid feeding valve core and the liquid receiving valve core to open and close.

[0019] Further, a spring lock pin is arranged in the middle of the guide rod, a lock pin hole is formed on the inner wall of the cavity, and the spring lock pin is clamped with the lock pin hole.

[0020] Further, the base body of the sealing structure is a metal sealing ring, an outer layer and an inner embedding are arranged on the base body, the outer layer is Hastelloy, and the inner embedding is a perfluoroether rubber gasket.

[0021] Further, inert gas inlets are arranged on the first shell.

[0022] Further, annular scraping strips are arranged on the outside of the second shell.

[0023] Further, the automatic docking connection device for ammonia fuel filling between ships further comprises a spherical hinge floating flange connected between the liquid receiving end module and the ammonia fuel receiving ship.

[0024] Compared with the prior art, the automatic docking connection device for ammonia fuel filling between ships has the following beneficial effects:

[0025] 1. The automatic docking connection device for ammonia fuel filling between ships has a high degree of automation: unlike the prior art which relies on manual docking and is cumbersome to operate, the present application can perform initial positioning with the cooperation of a photosensitive sensor and a laser emitter, the positioning mechanical arm assembly closely fits the liquid receiving end module and corrects the position of the liquid receiving end module, and the liquid receiving end module and the liquid receiving end module are precisely centered. The hydraulic auxiliary docking system drives the liquid receiving end module and the liquid receiving end module to communicate or separate, without human intervention throughout, with high safety; simple operation and high efficiency.

[0026] 2. The automatic docking connection device for ammonia fuel filling between ships has a closed cycle design optimization: compared with the prior art of recovering evaporated gas by BOG pipeline alone, the present application provides a sandwich channel in the hydraulic auxiliary docking system, a BOG inlet is arranged on the sandwich channel, an ammonia pull-off valve adopts a concentric double-wall pipe integrated structure, the ammonia pull-off valve includes an inner liquid ammonia flow channel and an outer BOG return gas path jacket, and the connecting hose is provided with a double layer, the connecting hose includes an inner channel and an outer channel, the inner channel and the outer channel are in communication with the ammonia fuel filling ship, the sandwich channel is in communication with the BOG return gas path jacket and the outer channel as an evaporated gas loop; during ammonia fuel filling between ships, the evaporated gas generated by the ammonia fuel receiving ship enters the evaporated gas loop through the BOG inlet and is recovered to the ammonia fuel filling ship, realizing closed cycle and forming a BOG closed loop, realizing efficient return of the ammonia evaporated gas of the receiving ship and avoiding fuel loss. At the same time, the number of pipeline installations is reduced, the cost and damage risk caused by shaking are reduced, the economy and environmental protection are taken into account, and the waste of resources of traditional technology is made up for.

[0027] 3. The automatic docking connection device for ammonia fuel filling between ships has stronger dynamic base adaptability: compared with the prior art which is difficult to cope with dynamic base filling between ships, the present application compensates for the deviation of the shaking angle of the ship through the spherical hinge floating flange, realizes double breaking and double sealing when the displacement exceeds the limit by matching the ammonia pull-off valve, and further combines the sealing structure and inert gas positive pressure protection to build a multiple leakage prevention scheme, greatly reducing the ammonia leakage risk under the dynamic base and solving the core problem of poor safety of traditional technology. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The overall structure working schematic diagram of the automatic docking connection device for ammonia fuel filling between ships according to the embodiment of the present application;

[0029] Figure 2 The local enlarged structure schematic diagram of the automatic docking connection device for ammonia fuel filling between ships according to the embodiment of the present application;

[0030] Figure 3 The local sectional structure schematic diagram of the automatic docking connection device for ammonia fuel filling between ships according to the embodiment of the present application;

[0031] Figure 4 The enlarged structure schematic diagram of A in FIG. 6; Figure 3

[0032] Figure 5 The structure schematic diagram of the liquid feeding end module of the automatic docking connection device for ammonia fuel filling between ships according to the embodiment of the present application;

[0033] Figure 6 The structure schematic diagram of the liquid receiving end module and the ball hinge type floating flange of the automatic docking connection device for ammonia fuel filling between ships according to the embodiment of the present application.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] ​1, positioning mechanical arm assembly; 11, first positioning mechanical arm; 12, second positioning mechanical arm; 13, third positioning mechanical arm; 101, arc-shaped roller; 102, positioning hydraulic cylinder; 103, mechanical connecting arm; 2, hydraulic auxiliary docking system; 201, interlayer channel; 202, BOG inlet; 3, spherical hinge floating flange; 301, elastic hose; 302, front end of floating flange; 303, rear end of floating flange; 4, ammonia pull-off valve; 41, male head; 42, female head; 401, liquid ammonia flow channel; 402, BOG backflow gas path jacket; 403, first pull-off sealing mechanism; 4031, first piston; 4032, first pre-tightening spring; 4033, first annular sealing body; 404, second pull-off sealing mechanism; 4041, second annular piston; 4042, second pre-tightening spring; 4043, second annular sealing body; 5, liquid feeding end module; 501, first housing; 502, guide rod; 503, helical groove; 504, liquid feeding valve core; 505, spring lock pin; 506, sealing structure; 507, photosensitive sensor; 508, inert gas inlet; 6, liquid receiving end module; 601, liquid receiving valve core; 602, spring; 603, cavity; 604, annular scraping strip; 605, lock pin hole; 606, valve core base; 607, second housing; 608, laser emitter; 7, ammonia fuel filling ship; 8, ammonia fuel receiving ship; 9, connecting hose. DETAILED DESCRIPTION

[0036] In order to make the technical means and purposes of the present application easy to understand, the embodiments of the present application are described in detail below in combination with specific drawings.

[0037] It should be noted that all directional and positional terms used in the present application, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "bottom", "transverse", "longitudinal", "center", etc., are used only for the purpose of explaining the relative positional relationship, connection condition, etc. between components in a certain state (as shown in the drawings) and are only for the convenience of describing the present application, and therefore cannot be understood as a requirement for the present application to be constructed and operated in a particular orientation. In addition, the description of "first", "second", etc. in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features.

[0038] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0041] Embodiment 1

[0042] The current ship clean energy refueling device does not have a special refueling technology for ammonia fuel, and does not consider the refueling process in the moving base state between ships, which has technical problems such as poor safety and low efficiency.

[0043] In order to solve the above technical problems, in the present embodiment, as shown in Figures 1-6 The ship-to-ship ammonia fuel refueling automatic docking connection device includes:

[0044] The liquid receiving end module 6 is connected with the ammonia fuel receiving ship 8, and a laser emitter 608 is arranged on the liquid receiving end module 6, which can emit a laser signal;

[0045] The liquid feeding end module 5 is connected with the ammonia fuel refueling ship 7, and a photosensitive sensor 507 is arranged on the liquid feeding end module 5, which can receive the laser signal emitted by the laser emitter 608, and the photosensitive sensor 507 cooperates with the laser emitter 608 to perform initial positioning;

[0046] The hydraulic auxiliary docking system 2 is connected between the liquid feeding end module 5 and the ammonia fuel refueling ship 7, and drives the liquid feeding end module 5 and the liquid receiving end module 6 to communicate or separate;

[0047] The positioning mechanical arm assembly 1 is connected to the hydraulic auxiliary docking system 2 at one end, the hydraulic auxiliary docking system 2 can provide power for the movement of the positioning mechanical arm assembly 1, and the other end of the positioning mechanical arm assembly 1 is closely attached to the liquid receiving end module 6 and corrects the position of the liquid receiving end module 6, so as to realize accurate centering of the liquid feeding end module 5 and the liquid receiving end module 6.

[0048] The automatic docking connection device for ammonia fuel filling between ships can be initially positioned by cooperating the photosensitive sensor 507 with the laser emitter 608, the positioning mechanical arm assembly 1 is closely attached to the liquid receiving end module 6 and corrects the position of the liquid receiving end module 6, so as to realize accurate centering of the liquid feeding end module 5 and the liquid receiving end module 6; the hydraulic auxiliary docking system 2 can make the liquid feeding end module 5 and the liquid receiving end module 6 communicate or separate, without manual intervention throughout the process, which is safe and has high safety; the operation is simple and efficient.

[0049] Specifically, the positioning mechanical arm assembly 1 includes a positioning hydraulic cylinder 102, a mechanical connecting arm 103 and an arc-shaped roller 101, one end of the positioning hydraulic cylinder 102 is installed on the hydraulic auxiliary docking system 2, and the other end of the positioning hydraulic cylinder 102 is installed on the mechanical connecting arm 103; one end of the mechanical connecting arm 103 is installed on the hydraulic auxiliary docking system 2, and the arc-shaped roller 101 is installed on the other end of the mechanical connecting arm 103, and the arc-shaped roller 101 is closely attached to the liquid receiving end module 6.

[0050] More specifically, the force of the arc-shaped roller 101 pressing the outer side of the liquid receiving end module 6 can be controlled through the extension and retraction movement of the positioning hydraulic cylinder 102 and the rotation of the mechanical connecting arm 103.

[0051] In the ammonia fuel filling preparation process, the positioning mechanical arm assembly 1 is closely attached to the liquid receiving end module 6 and corrects the position of the liquid receiving end module 6, so as to realize accurate centering of the liquid feeding end module 5 and the liquid receiving end module 6; in the filling process, the positioning mechanical arm assembly 1 is retracted to the outside of the shell of the liquid feeding end module 5 to prevent the ship from shaking.

[0052] More specifically, the arc-shaped roller 101 is closely attached to the second shell 607 of the liquid receiving end module 6. The arc-shaped roller 101 can replace arc-shaped rollers 101 of different arc sizes according to the different diameters of the second shell 607 of the liquid receiving end module 6, so as to ensure that the arc-shaped roller 101 is closely attached to the second shell 607.

[0053] Further, the number of positioning mechanical arms of the positioning mechanical arm assembly 1 is not specifically limited.

[0054] In this embodiment, the number of positioning mechanical arms of the positioning mechanical arm assembly 1 is set to three.

[0055] The positioning mechanical arm assembly 1 comprises a first positioning mechanical arm 11, a second positioning mechanical arm 12 and a third positioning mechanical arm 13, which are equidistantly distributed around the hydraulic auxiliary docking system 2.

[0056] Specifically, the automatic docking connection device for inter-ship ammonia fuel filling further comprises an ammonia pull-off valve 4, the front end of the ammonia pull-off valve 4 is connected with the end of the hydraulic auxiliary docking system 2, and the end of the ammonia pull-off valve 4 is connected with the ammonia fuel filling ship 7 through a connecting hose 9.

[0057] Specifically, a sandwich passage 201 is arranged in the hydraulic auxiliary docking system 2, a BOG inlet 202 is arranged on the sandwich passage 201, the ammonia pull-off valve 4 adopts a concentric double-wall pipe integrated structure, the ammonia pull-off valve 4 comprises an inner-layer liquid ammonia flow channel 401 and an outer-layer BOG backflow gas path jacket 402, the connecting hose 9 is arranged in double layers, the connecting hose 9 comprises an inner-layer passage and an outer-layer passage, the inner-layer passage and the outer-layer passage are both in communication with the ammonia fuel filling ship 7, the sandwich passage 201 is in communication with the BOG backflow gas path jacket 402 and the outer-layer passage as an evaporation gas loop, and the inner-layer passage is in communication with the liquid ammonia flow channel 401. During inter-ship ammonia fuel filling, the evaporation gas generated by the ammonia fuel receiving ship 8 enters the evaporation gas loop through the BOG inlet 202 and is recycled to the ammonia fuel filling ship 7, so that closed circulation is realized.

[0058] The arrangement improves the ammonia fuel filling efficiency. During inter-ship ammonia fuel filling, compared with recycling evaporation gas by using a BOG pipeline alone, recycling evaporation gas by using a double-wall pipeline can realize efficient backflow of ammonia evaporation gas of the ammonia fuel receiving ship 8 and avoid fuel loss. Meanwhile, the number of pipeline installations is reduced, the installation cost is lowered, the filling efficiency is improved, and the installation risk and ammonia fuel leakage risk caused by ship sway are reduced.

[0059] The hydraulic power is from the pipeline of the ammonia fuel filling ship 7, is fast connected to the hydraulic auxiliary docking system 2 through the connecting hose 9, and provides power for the positioning mechanical arm assembly 1 to control the movement of the mechanical arm.

[0060] Specifically, as shown in Figure 3 The ammonia pull-off valve 4 comprises a male head 41 and a female head 42, the male head 41 is arranged on the side close to the ammonia fuel filling ship 7, and the female head 42 is arranged on the side close to the ammonia fuel receiving ship 8.

[0061] Specifically, as shown in Figure 3 The first pull-off sealing mechanism 403 is arranged in the liquid ammonia flow channel 401 of the male head 41 and the female head 42. Figure 3As shown, the second breakaway sealing mechanism 404 is arranged in the BOG return gas path jacket 402 of the male head 41 and the female head 42.

[0062] The arrangement can ensure that the self-activated sealing of the inner and outer channels can be achieved when the breakaway occurs under the over-limit tension, and the leakage of the fuel pumped out of the filling ship can be prevented to the maximum extent.

[0063] Specifically, as shown in the drawings, Figure 3 The first breakaway sealing mechanism 403 includes a first piston 4031, a first pre-tightening spring 4032 arranged in the first piston 4031, and a first annular sealing body 4033 arranged on the first piston 4031.

[0064] When the breakaway occurs, the first pre-tightening spring 4032 drives the first piston 4031 to move axially, and the first annular sealing body 4033 on the first piston 4031 is radially expanded under the radial extrusion of the inner part of the valve body, thereby achieving the active sealing of the liquid ammonia flow channel 401.

[0065] Specifically, as shown in the drawings, Figure 4 The second breakaway sealing mechanism 404 includes a second annular piston 4041, a second pre-tightening spring 4042 arranged in the second annular piston 4041, and a second annular sealing body 4043 arranged on the second annular piston 4041.

[0066] More specifically, the first annular sealing body 4033 and the second annular sealing body 4043 are FFKM sealing rings.

[0067] When the breakaway occurs, the second pre-tightening spring 4042 drives the second annular piston 4041 to move axially, and the second annular sealing body 4043 on the second annular piston 4041 is radially expanded under the radial extrusion of the tapered surface of the inner part of the valve body, thereby achieving the active sealing of the annular gas path of the BOG return gas path jacket 402.

[0068] When the ship sway is greater than the maximum threshold of the compensation angle of the spherical hinge floating flange 3, the relative displacement of the ammonia fuel filling ship 7 and the ammonia fuel receiving ship 8 exceeds the limit, causing the double-layer connecting hose 9 to bear abnormal tension and torque, the male head 41 of the ammonia pull-off valve 4 is disconnected on the side of the ammonia fuel filling ship 7, the first pull-off sealing mechanism 403 can automatically seal the liquid ammonia flow channel 401, and the second pull-off sealing mechanism 404 can automatically seal the annular gas path of the BOG backflow gas path jacket 402, so that the leakage of the fuel pumped out of the ammonia fuel filling ship 7 can be prevented to the greatest extent; at the same time, the male head 41 of the ammonia pull-off valve 4 is retracted with the connecting hose 9, and the female head 42 of the ammonia pull-off valve 4 is disconnected on the side of the ammonia fuel receiving ship 8, the first pull-off sealing mechanism 403 can automatically seal the liquid ammonia flow channel 401, and the second pull-off sealing mechanism 404 can automatically seal the annular gas path of the BOG backflow gas path jacket 402, so that the double-disconnection and double-sealing are realized.

[0069] Specifically, the liquid feeding end module 5 includes a first housing 501, a guide rod 502, a spiral groove 503, a liquid feeding valve core 504, and a sealing structure 506; the spiral groove 503 is arranged at the rear end of the first housing 501, the guide rod 502 is connected to the liquid feeding valve core 504 at the front end, and the sealing structure 506 is arranged at the front end of the liquid feeding valve core 504; the liquid receiving end module 6 includes a liquid receiving valve core 601, a spring 602, a cavity 603, a valve core base 606, and a second housing 607; the cavity 603 is formed in the second housing 607, and the liquid receiving valve core 601 is arranged in the cavity 603; the sealing structure 506 is arranged at one end of the liquid receiving valve core 601, and the other end of the liquid receiving valve core 601 is connected to the valve core base 606; the spring 602 is arranged outside the liquid receiving valve core 601; the hydraulic auxiliary docking system 2 can drive the guide rod 502 to rotate and move along the spiral groove 503, so as to drive the liquid feeding valve core 504 and the liquid receiving valve core 601 to open and close, and then make the liquid feeding end module 5 and the liquid receiving end module 6 communicate or separate.

[0070] The hydraulic auxiliary docking system 2 can drive the guide rod 502 in the liquid feeding end module 5 to move along the spiral groove 503 during the filling process, so as to drive the liquid feeding valve core 504 of the liquid feeding end module 5 and the liquid receiving valve core 601 of the liquid receiving end module 6 to open. This setting can free manual operation, and the whole process does not need manual intervention, which is safe, simple to operate, and efficient.

[0071] The liquid receiving valve core 601 reciprocates in the cavity 603 under the action of the spring 602, so as to open and close the liquid receiving end module 6.

[0072] Specifically, a spring lock pin 505 is arranged in the middle of the guide rod 502, and a lock pin hole 605 is formed on the inner wall of the cavity 603, and the spring lock pin 505 is clamped with the lock pin hole 605.

[0073] The liquid feeding end module 5 is driven by the hydraulic pressure to move the liquid feeding valve core 504, so as to compress the spring 602 of the liquid receiving end module 6, and then drive the liquid receiving valve core 601 to move, and the filling process is started. In the process of moving, the spring lock pin 505 is clamped into the lock pin hole 605, mechanical interlocking is realized, the liquid receiving valve core 601 is opened to the maximum, and the ammonia fuel filling flow reaches the maximum.

[0074] Specifically, the base body of the sealing structure 506 is a metal sealing ring, and an outer layer and an inner embedding are arranged on the base body. The outer layer is Hastelloy, and the inner embedding is a perfluoro ether rubber gasket.

[0075] Ammonia fuel is corrosive to metals such as iron, copper and zinc. Hastelloy is resistant to ammonia corrosion, and perfluoro ether rubber is resistant to chemical corrosion and has good low-temperature elasticity, thereby avoiding ammonia penetration.

[0076] An inert gas inlet 508 is arranged on the first shell 501.

[0077] When the liquid feeding valve core 504 is closed, nitrogen is injected into the sealing surface through the inert gas inlet 508 to maintain a positive pressure environment, thereby preventing ammonia gas leakage or air from entering to form an explosive mixture.

[0078] Since ammonia is prone to frosting at low temperature, impurities are prevented from damaging the seal. An annular scraping strip 604 is arranged on the outside of the second shell 607. The annular scraping strip 604 is made of linear polyethylene with a relative molecular mass greater than 1.5 million, and is used at a temperature of -269 to 80℃ for a long time. This setting automatically removes frost or impurities on the sealing surface during plugging.

[0079] Specifically, the automatic docking connection device for ammonia fuel filling between ships further comprises a spherical hinge floating flange 3, which is connected between the liquid receiving end module 6 and the ammonia fuel receiving ship 8.

[0080] The purpose of the spherical hinge floating flange 3 is to allow a small angle angular deviation between the liquid feeding end module 5 and the liquid receiving end module 6, and to break through the rigid docking compensation for the floating change in the filling process between ships.

[0081] An elastic hose 301 is arranged in the spherical hinge floating flange 3, and the elastic hose 301 can seal and connect the floating flange front end 302 and the floating flange rear end 303.

[0082] The elastic hose 301 solves the complexity of mechanical seal required for ammonia fuel directly flowing through the ball hinge floating flange 3, preventing leakage between the ball hinge floating flange 3 and the connection during the ammonia fuel filling process.

[0083] More specifically, the floating flange front end 302 is connected with the second shell 607 of the liquid receiving end module 6, and the floating flange rear end 303 is connected with the flange of the ammonia fuel receiving ship 8.

[0084] The operation process of the automatic docking connection device for ammonia fuel filling between ships according to the embodiment is as follows: first, the initial positioning is performed by the laser emitter 608 of the liquid receiving end module 6 and the photosensitive sensor 507 of the liquid feeding end module 5 to assist the ship in adjusting the position; when the positioning mechanical arm assembly 1 can contact the liquid receiving end module 6, the positioning mechanical arm assembly 1 driven by the hydraulic auxiliary docking system 2 is extended, the arc-shaped roller 101 at the end of the positioning mechanical arm assembly 1 closely adheres to and corrects the position of the liquid receiving end module 6, and precise centering is achieved; then, the hydraulic auxiliary docking system 2 drives the guide rod 502 of the liquid feeding end module 5 to move along the spiral groove 503, drives the liquid feeding valve core 504 to advance and open, the liquid receiving valve core 601 of the liquid receiving end module 6 is opened, the liquid feeding end module 5 is communicated with the liquid receiving end module 6, then the spring lock pin 505 is clamped into the lock pin hole 605 to realize mechanical interlocking, and the sealing structure 506 forms a seal; during the filling process, the ammonia fuel is transported through the inner liquid ammonia flow channel 401 of the ammonia pull-off valve 4, the evaporated gas generated by the ammonia fuel receiving ship 8 enters the evaporated gas loop through the BOG inlet 202 and is recycled to the ammonia fuel filling ship 7, realizing closed cycle, the ball hinge floating flange 3 compensates the angle deviation caused by the relative movement of the ships in real time, and the sealing is reliable; at the end of the operation, the hydraulic auxiliary docking system 2 moves reversely to close the liquid feeding valve core 504 and the liquid receiving valve core 601, and the liquid feeding end module 5 is separated from the liquid receiving end module 6; if an emergency over-limit pulling force occurs, the ammonia pull-off valve 4 is triggered instantaneously, the liquid ammonia flow channel 401 and the BOG return gas path jacket 402 are simultaneously cut off, double-channel self-sealing is realized, and the whole process is safe and leak-free.

[0085] The automatic docking connection device for ammonia fuel filling between ships according to the embodiment has the following beneficial effects:

[0086] 1. The automatic docking connection device for ammonia fuel filling between ships according to the embodiment has high automation: different from the prior art which relies on manual docking and has complicated operation, the present application can perform initial positioning by relying on the cooperation of the photosensitive sensor and the laser emitter, the positioning mechanical arm assembly closely adheres to and corrects the position of the liquid receiving end module, and precise centering of the liquid feeding end module and the liquid receiving end module is achieved; the hydraulic auxiliary docking system drives the liquid feeding end module and the liquid receiving end module to communicate or separate, and no manual intervention is required throughout the process, which is safe and has high safety; the operation is simple and efficient.

[0087] 2. The automatic docking connection device for ammonia fuel filling between ships according to the embodiment, which is closed cycle designed and optimized: compared with the prior art of recovering evaporation gas by BOG pipeline alone, the application sets a sandwich channel in the hydraulic auxiliary docking system, sets a BOG inlet on the sandwich channel, uses a concentric double-wall pipe integrated structure for the ammonia pull-off valve, and the ammonia pull-off valve includes a liquid ammonia flow channel in the inner layer and a BOG backflow gas path jacket in the outer layer; the connecting hose is provided with a double layer, and the connecting hose includes an inner layer channel and an outer layer channel, both the inner layer channel and the outer layer channel are communicated with the ammonia fuel filling ship, the sandwich channel is communicated with the BOG backflow gas path jacket and the outer layer channel as an evaporation gas loop; during the ammonia fuel filling between ships, the evaporation gas generated by the receiving ship is recovered to the ammonia fuel filling ship through the BOG inlet into the evaporation gas loop, realizing closed cycle and forming a BOG closed cycle loop, realizing efficient backflow of ammonia evaporation gas of the receiving ship, avoiding fuel loss. At the same time, the number of pipeline installations is reduced, the cost and damage risk caused by shaking are reduced, the economy and environmental protection are taken into account, and the waste of traditional technology resources is made up for.

[0088] 3. The automatic docking connection device for ammonia fuel filling between ships according to the embodiment, which has stronger dynamic base adaptability: compared with the prior art which is difficult to cope with the defects of dynamic base filling between ships, the application compensates for the deviation of the shaking angle of the ship by the ball hinge floating flange, realizes double breaking and double sealing when the displacement exceeds the limit by matching the ammonia pull-off valve, and further combines the sealing structure and inert gas positive pressure protection to build a multiple leakage prevention scheme, greatly reduces the ammonia leakage risk under the dynamic base, and solves the core problem of poor safety of traditional technology.

[0089] Although the application is disclosed as above, the application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the application, and therefore the protection scope of the application should be subject to the scope defined by the claims.

Claims

1. An automatic docking connection device for ammonia refueling between ships, characterized in that, The automatic docking connection device for ammonia refueling between ships includes: A liquid-filled end module (6) is connected to an ammonia fuel receiving vessel (8). A laser emitter (608) is installed on the liquid-filled end module (6) and the laser emitter (608) is capable of emitting laser signals. A liquid feeder module (5) is connected to an ammonia fuel bunkering vessel (7). A photosensitive sensor (507) is installed on the liquid feeder module (5). The photosensitive sensor (507) can receive the laser signal emitted by the laser emitter (608). The photosensitive sensor (507) and the laser emitter (608) cooperate to perform initial positioning. Hydraulic auxiliary docking system (2), which is connected between the feed end module (5) and the ammonia fuel bunkering vessel (7), drives the feed end module (5) to connect or disconnect from the receiving end module (6); The positioning robotic arm assembly (1) is connected at one end to the hydraulic auxiliary docking system (2). The hydraulic auxiliary docking system (2) can provide power for the movement of the positioning robotic arm assembly (1). The other end of the positioning robotic arm assembly (1) is closely attached to the liquid receiving end module (6) and the position of the liquid receiving end module (6) is corrected to achieve precise alignment between the liquid feeding end module (5) and the liquid receiving end module (6).

2. The automatic docking connection device for ammonia refueling between ships according to claim 1, characterized in that, The positioning robotic arm assembly (1) includes a positioning hydraulic cylinder (102), a mechanical connecting arm (103), and an arc-shaped roller (101). One end of the positioning hydraulic cylinder (102) is mounted on the hydraulic auxiliary docking system (2), and the other end of the positioning hydraulic cylinder (102) is mounted on the mechanical connecting arm (103). One end of the mechanical connecting arm (103) is mounted on the hydraulic auxiliary docking system (2), and the arc-shaped roller (101) is mounted on the other end of the mechanical connecting arm (103). The arc-shaped roller (101) is in close contact with the liquid receiving end module (6).

3. The automatic docking connection device for ammonia refueling between ships according to claim 1, characterized in that, The automatic docking connection device for ammonia refueling between ships also includes an ammonia break valve (4), the front end of which is connected to the end of the hydraulic auxiliary docking system (2), and the end of which is connected to the ammonia refueling vessel (7) via a connecting hose (9).

4. The automatic docking connection device for ammonia refueling between ships according to claim 3, characterized in that, A double-walled channel (201) is provided in the hydraulic assisted docking system (2), and a BOG inlet (202) is provided on the double-walled channel (201). The ammonia break-off valve (4) adopts a concentric double-walled pipe integrated structure. The ammonia break-off valve (4) includes an inner liquid ammonia flow channel (401) and an outer BOG return gas path jacket (402). The connecting hose (9) is set as a double layer. The connecting hose (9) includes an inner channel and an outer channel. The inner channel and the outer channel are both connected to the ammonia fuel bunkering vessel (7). The double-walled channel (201) is connected to the BOG return gas path jacket (402) and the outer channel as an evaporation gas circuit. When ammonia fuel is bunkered between ships, the evaporation gas generated by the ammonia fuel receiving vessel (8) enters the evaporation gas circuit through the BOG inlet (202) and is recovered to the ammonia fuel bunkering vessel (7) to achieve a closed loop.

5. The automatic docking connection device for ammonia refueling between ships according to claim 1, characterized in that, The feed end module (5) includes a first housing (501), a guide rod (502), a spiral groove (503), a liquid filling valve core (504), and a sealing structure (506); a spiral groove (503) is provided at the rear end inside the first housing (501), the front end of the guide rod (502) is connected to the liquid filling valve core (504), and a sealing structure (506) is installed at the front end of the liquid filling valve core (504). The receiving end module (6) includes a receiving valve core (601), a spring (602), a cavity (603), a valve core base (606), and a second housing (607); the first The inner cavity (603) of the outer shell (607) is formed, and the liquid receiving valve core (601) is disposed inside the cavity (603); the sealing structure (506) is disposed at one end of the liquid receiving valve core (601), and the other end of the liquid receiving valve core (601) is connected to the valve core base (606); the spring (602) is sleeved on the outside of the liquid receiving valve core (601); the hydraulic auxiliary docking system (2) can push the guide rod (502) to rotate and move along the spiral groove (503), thereby driving the liquid filling valve core (504) and the liquid receiving valve core (601) to open and close.

6. The automatic docking connection device for ammonia refueling between ships according to claim 5, characterized in that, A spring locking pin (505) is provided in the middle of the guide rod (502), and a locking pin hole (605) is formed on the inner wall of the cavity (603). The spring locking pin (505) is engaged with the locking pin hole (605).

7. An automatic docking connection device for ammonia refueling between ships according to claim 5, characterized in that, The base of the sealing structure (506) is a metal sealing ring, and an outer layer and an inner layer are provided on the base. The outer layer is Hastelloy, and the inner layer is a perfluoroether rubber gasket.

8. An automatic docking connection device for ammonia refueling between ships according to claim 5, characterized in that, An inert gas inlet (508) is provided on the first outer casing (501).

9. An automatic docking connection device for ammonia refueling between ships according to claim 5, characterized in that, An annular scraper (604) is provided on the outer side of the second housing (607).

10. An automatic docking connection device for ammonia refueling between ships according to claim 1, characterized in that, The automatic docking connection device for ammonia refueling between ships also includes a ball-joint floating flange (3), which is connected between the liquid-filling end module (6) and the ammonia refueling receiving vessel (8).

Images