Marine hydrogen filling arm suitable for large water level fall and marine hydrogen filling system

Abstract

According to the marine hydrogen filling arm suitable for the large water level fall and the marine hydrogen filling system, the filling arm framework of a four-connecting-rod structure is arranged to support the hydrogen filling hose, the outer arm assembly is pulled to be close to a filling ship, and then hydrogen can be conveyed; a balance weight assembly and a balance assembly in the four-bar mechanism maintain balance for the whole filling arm framework, a connection guarantee is provided for long-distance high-pressure hydrogen hose filling, and the risks of damage, breakage, hydrogen leakage after breakage and the like caused by the large span of a hose are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of marine high-pressure hydrogen filling, and further to a marine hydrogen filling arm and a marine hydrogen filling system suitable for large water level differences. Background Art

[0002] Hydrogen fuel is a good solution for carbon emission reduction and decarbonization in the shipping industry, and its application scope will gradually expand as the fuel application technology matures and supporting facilities are improved. Hydrogen-powered ships are usually used in lakes, inland rivers, offshore and other scenarios, mainly passenger ships, ferries, inland cargo ships, tugboats and other types; the development of large hydrogen-powered ships such as offshore engineering ships, offshore ro-ro ships, and super yachts is the current international trend.

[0003] Compared with the refueling of conventional marine fuel media, the refueling of high-pressure hydrogen for ships has risks such as high pressure and easy leakage; compared with the refueling of land vehicles, there are problems such as long distance, large envelope, and long refueling time. Some docks also have problems such as large water level differences. These risks and problems bring certain risks to the refueling of ships with high-pressure hydrogen. Summary of the invention

[0004] In view of the problems of difficulty in refueling of ship high-pressure hydrogen and poor safety in the prior art, the present invention provides a ship hydrogen refueling arm suitable for large water level difference, and a refueling arm skeleton with a four-link structure is arranged to provide support for the hydrogen refueling hose. The outer arm assembly is pulled close to the refueling ship to transport hydrogen. The counterweight assembly and the balance assembly in the four-link mechanism maintain the balance of the entire refueling arm skeleton, and provide connection guarantee for long-distance high-pressure hydrogen hose refueling, avoiding the risks of damage and breakage of the hose due to the large span, and hydrogen leakage after breakage.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A marine hydrogen filling arm suitable for large water level difference comprises: a hydrogen filling device and a filling arm skeleton; the filling arm skeleton comprises a counterweight assembly, a balance assembly, an inner arm assembly and an outer arm assembly, which are connected in pairs through rotating assemblies to form a four-bar structure, and the center of gravity of the four-bar structure is located on the inner arm assembly; the hydrogen filling device comprises a hydrogen filling hose, and the hydrogen filling hose is arranged along the inner arm assembly and the outer arm assembly.

[0007] In some embodiments, it also includes: a column and a pivot box, the bottom of the column is fixed; the pivot box is rotatably connected to the top of the column through a first swivel support mechanism; the pivot box is rotatably connected to the center of gravity position on the inner arm assembly through a second swivel support mechanism.

[0008] In some embodiments, the pivot box further includes a damping assembly, which includes a slow-descent plate and a brake; the slow-descent plate is connected to the center of gravity position on the inner arm assembly via a support flange to form a rotating structure; the brake is used to clamp the outer edge of the slow-descent plate to damp the rotation of the rotating structure.

[0009] In some embodiments, there are at least two brakes, which are arranged on both sides of the slow-descent plate and fixed on the rotating shaft box.

[0010] In some embodiments, the hydrogenation device further comprises a hydrogenation gun, and an input end of the hydrogenation gun is connected to an output end of the hydrogen filling hose.

[0011] In some embodiments, a telescopic tube assembly is further included, one end of which is connected to the rear end of the outer arm assembly, and the other end of which is provided with a hydrogenation gun mounting seat for accommodating the hydrogenation gun.

[0012] In some embodiments, the present invention further comprises: a breakaway valve disposed on the hydrogen filling hose.

[0013] In some embodiments, the telescopic tube assembly includes an inner cylinder, an outer cylinder and a tension spring disposed in the inner cylinder, the inner cylinder and the outer cylinder are both provided with an opening and a plug, the plug of the inner cylinder is connected to the tail end of the outer arm assembly, the opening of the inner cylinder passes through the opening of the outer cylinder and is sleeved in the outer cylinder; the two ends of the tension spring are respectively connected to the plug of the inner cylinder and the plug of the outer cylinder; the hydrogen gun mounting seat is provided on the outer cylinder.

[0014] In some embodiments, the inner arm assembly and the outer arm assembly are both planar truss structures.

[0015] The present invention also provides a marine hydrogen filling system, comprising: a hydrogen filling machine for providing hydrogen fuel and the above-mentioned marine hydrogen filling arm, wherein the hydrogen filling machine is connected to the input end of the hydrogen filling hose.

[0016] Compared with the prior art, the marine hydrogen filling arm suitable for large water level drop provided by the present invention has the following beneficial effects:

[0017] 1. The four-link filling arm skeleton provided by the present invention provides support for the hydrogen filling hose, provides connection guarantee for long-distance high-pressure hydrogen hose filling, and avoids the risks of damage, breakage and hydrogen leakage after breakage of the hose due to the large span;

[0018] 2. The four-link structure provided in the present invention can rotate around the axis of the column, thereby expanding the filling range and meeting the filling requirements in different directions;

[0019] 3. The present invention sets a telescopic tube assembly at the end of the outer arm assembly, which is usually in a retracted state to avoid interference with on-site guardrails, ship parts, etc. caused by the end of the outer arm assembly being too long; when filling, the pull rope on the outer cylinder of the telescopic tube assembly is pulled to achieve stretching, which facilitates the removal of the hydrogen filling gun. The telescopic tube assembly further increases the envelope range of the marine hydrogen filling arm;

[0020] 4. The present invention sets a damping structure in the rotating shaft box, and the slow-down plate in the damping assembly is connected to the inner arm assembly. When the hydrogenation gun is removed, the weight of the end of the outer arm assembly is reduced. At this time, the brake in the damping assembly slows down the rotation of the inner arm assembly by clamping the outer edge of the slow-down plate, thereby avoiding the problem of instability of the balance structure after the hydrogenation gun is removed during filling;

[0021] 5. The lattice structure design of the inner arm assembly and the outer arm assembly provided by the present invention overcomes the balancing problem of an excessively large force arm ratio, while achieving a lightweight design of the filling arm and ensuring the safety performance of the filling arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0023] Figure 1 A schematic diagram of the structure of a marine hydrogen filling arm provided by the present invention;

[0024] Figure 2 A three-dimensional diagram of the rotating shaft box provided by the present invention;

[0025] Figure 3 This is a front view of the rotating shaft box provided by the present invention;.

[0026] Figure 4 A top view of the rotating shaft box provided by the present invention;

[0027] Figure 5 A side view of the rotating shaft box provided by the present invention;

[0028] Figure 6 A schematic diagram of the structure of the telescopic tube assembly provided by the present invention;

[0029] Figure 7 A schematic diagram of the marine hydrogen filling arm provided by the present invention in a reset state;

[0030] Figure 8 A schematic diagram of the marine hydrogen filling arm provided by the present invention when crossing the guardrail;

[0031] Fig. 9 A schematic diagram of a marine hydrogen filling arm provided by the present invention in a filling state;

[0032] Fig.10 A schematic diagram of the marine hydrogen filling arm provided by the present invention in the maximum working range;

[0033] Fig.11 This is a schematic structural diagram of the four-bar linkage provided by the present invention when it is unfolded.

[0034] Description of Figure Numbers:

[0035] 1—column; 2—counterweight assembly; 3—balance assembly; 4—inner arm assembly; 5—outer arm assembly; 6—hydrogen filling hose;

[0036] 7—spindle box; 71—handrail; 72—box frame; 73—first slewing support mechanism; 74—locking block; 75—second slewing support mechanism; 76—support flange; 77—slow-down plate; 78—brake; 7478

[0037] 8—hydrogenation gun; 9—breakaway valve;

[0038] 10—telescopic tube assembly; 101—inner cylinder; 102—inner cylinder plug; 103—outer cylinder; 104—outer cylinder plug; 105—tension spring; 106—hydrogenation gun mounting seat;

[0039] 11—Guardrail. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0041] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0042] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0043] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] Example 1

[0046] like Figure 1 As shown, the present invention provides a marine hydrogen filling arm suitable for large water level drop, including a hydrogen filling device and a filling arm frame. Specifically:

[0047] The filling arm skeleton includes a counterweight assembly 2, a balance assembly 3, an inner arm assembly 4 and an outer arm assembly 5. The above four assemblies are connected in pairs through a rotating assembly to form a movable four-bar structure, and the center of gravity of the four-bar structure is always located on the inner arm assembly 4.

[0048] A traction point is provided on the tail end of the counterweight assembly 2 and the outer arm assembly 5 . The traction point of the counterweight assembly 2 is preferably provided near the connection between the counterweight assembly 2 and the inner arm assembly 4 .

[0049] In some embodiments, the filling arm skeleton further includes: a column 1 and a rotating shaft box 7, and the bottom of the column 1 is fixedly disposed on the shore.

[0050] Preferably, the inner arm assembly 4 and the outer arm assembly 5 are both planar truss structures. The truss structure design overcomes the balancing problem of excessively large lever arm ratio, that is, the ratio of the lever arm sizes on both sides of the inner arm assembly 4 with the column 1 as the center.

[0051] like Figures 2 to 5 As shown, the shaft box 7 is rotatably connected to the top of the column 1 through the first slewing support mechanism 73, so that the four-bar structure can rotate around the axis of the column 1, thereby increasing the filling range of the marine hydrogen filling arm.

[0052] The rotating shaft box 7 is rotatably connected to the center of gravity position of the inner arm assembly 4 through the second slewing support mechanism 75 .

[0053] Specific: Combined Fig.11As shown, the center of gravity of the inner arm assembly 4 is hinged to the shaft box 7 at the hinge point O, one end of the counterweight assembly 2 is hinged to the head end of the inner arm assembly 4 at the hinge point B, one end of the counterweight assembly 2 is hinged to the head end of the balance assembly 3 at the hinge point A, the tail end of the balance assembly 3 is hinged to the head end of the outer arm assembly 5, and the tail end of the inner arm assembly 4 is hinged to the outer arm assembly 5 at the hinge point C. When the four-bar structure moves: the inner arm assembly 4 rotates around the hinge point O, thereby realizing a large amplitude variation action, the counterweight assembly 2 rotates around the hinge point B, pulling the balance assembly 3, thereby driving the outer arm assembly 5 to rotate around the hinge point C to realize a small amplitude variation action.

[0054] The hydrogen filling device includes a hydrogen filling hose 6, which is arranged along the column 1, the inner arm assembly 4, and the outer arm assembly 5, and is fixed to the inner arm assembly 4 and the outer arm assembly 5 by a pipe clamp. A U-shaped bend is set at the movable joint of the inner arm assembly 4 and the outer arm assembly 5 as compensation.

[0055] In the face of a large water level difference, compared with the method of directly using a hydrogen hose of tens of meters to transport hydrogen, the filling arm skeleton provided by the present invention provides support for the hydrogen filling hose 6, and provides connection guarantee for long-distance high-pressure hydrogen hose 8 filling, thereby avoiding frequent bending and stretching of the hydrogen filling hose 6 due to the large filling span, and also avoiding severe collision and friction between the hydrogen filling hose 6 and obstacles such as rock walls, thereby preventing the hydrogen filling hose 6 from being damaged or broken.

[0056] The four-bar structure rotates around the axis of the column 1 to the angle corresponding to the filling ship, pulls the traction point on the outer arm assembly 5, and the inner arm assembly 4 rotates around the hinge point O in the direction close to the filling ship, and drives the counterweight assembly 2 and the balance assembly 3 to rotate to maintain the balance of the four-bar structure. The four-bar structure gradually unfolds, and the output end of the hydrogen filling hose 6 moves with the outer arm assembly 5 to the area where the filling ship is located. The inner arm assembly 4 continues to rotate around the hinge point O to a suitable angle, so that the output end of the hydrogen filling hose 6 drops to the hydrogen filling port close to the ship to fill the ship with hydrogen. After the filling is completed, the traction point on the counterweight assembly 2 is pulled, and the inner arm assembly 4 rotates around the hinge point O in the direction away from the filling ship, driving the tail end of the outer arm assembly 5 away from the filling ship, so that the four-bar structure gradually closes.

[0057] In some embodiments, the hydrogenation device further includes a hydrogenation gun 8, the input end of the hydrogenation gun 8 is connected to the output end of the hydrogen filling hose 6, when the output end of the hydrogen filling hose 6 drops to the hydrogen filling port of the ship, the operator connects the hydrogenation gun 8 to the hydrogen filling port of the ship, and hydrogen is transported from the shore-based hydrogenation machine to the hydrogenation gun 8 through the hydrogen filling hose 6, and then the hydrogenation gun 8 fills the ship.

[0058] In some embodiments, the hydrogenation device further comprises: a breakaway valve 9 arranged on the hydrogen filling hose 6. Preferably, the breakaway valve 9 is fixed at the tail end of the outer arm assembly 5. When an unexpected situation occurs, such as the ship sails away after the hydrogen filling gun 8 is not pulled out after the ship is filled with hydrogen, the breakaway valve 9 can be broken at this time. The breakaway valve 9 instantly cuts off the hydrogen filling hose 6 connected at both ends to prevent hydrogen leakage. Moreover, fixing the breakaway valve 9 at the tail end of the outer arm assembly 5 can also ensure that the breakaway valve 9 will not directly rebound and collide with the ship under the action of the tension of the hydrogen filling hose 6, thereby avoiding damage to the hull.

[0059] Example 2

[0060] On the basis of Example 1, this embodiment provides an installation structure for a hydrogen filling gun: the marine hydrogen filling arm is also provided with a telescopic tube assembly 10, one end of the telescopic tube assembly 10 is connected to the tail end of the outer arm assembly 5, and the other end of the telescopic tube assembly 10 is provided with a hydrogen filling gun mounting seat 106 for accommodating the hydrogen filling gun 8. When filling, the telescopic tube assembly 10 is extended to remove the hydrogen filling gun 8.

[0061] In some embodiments, Figure 6 As shown, the telescopic tube assembly 10 includes an inner cylinder 101, an outer cylinder 103 and a tension spring 105 arranged in the inner cylinder 101. The inner cylinder 101 and the outer cylinder 103 are both provided with an opening and a plug. The inner cylinder plug 102 is connected to the tail end of the outer arm assembly 5 by a pin. The opening of the inner cylinder 101 passes through the opening of the outer cylinder 103 and is sleeved in the outer cylinder 103. The two ends of the tension spring 105 are respectively connected to the inner cylinder plug 102 and the outer cylinder plug 104.

[0062] A hydrogenation gun mounting seat 106 is provided on the outer cylinder 103 , and a pull rope is provided on the outer cylinder plug 104 .

[0063] When hydrogen filling is not required, the telescopic tube assembly 10 is in a vertical state, the tension spring 105 is in a contracted state, and the hydrogenation gun 8 is installed on the hydrogenation gun mounting seat 106 to avoid interference with on-site guardrails, ship parts, etc. caused by the end of the filling arm skeleton being too long.

[0064] When the outer arm assembly 5 moves to an area close to the refueling ship, the operator pulls the pull rope connected to the outer cylinder plug 104, and the outer cylinder 103 moves downward, making it convenient to remove the hydrogen gun 8 for refueling the ship. After releasing the pull rope, the outer cylinder 103 automatically retracts under the action of the tension spring 105. The setting of the telescopic tube assembly 10 further increases the envelope range of the ship's hydrogen refueling arm.

[0065] Example 3

[0066] Based on the above embodiment, this embodiment provides a specific structure of the shaft box 7: Figures 2 to 5 As shown, the shaft box 7 includes a box frame 72, an armrest 71 and a locking block 74. The armrest 71 is arranged on the box frame 72, and the locking block 74 is arranged at the bottom of the box frame 72. When the four-bar structure rotates around the axis of the column 1, the locking block 74 is used to lock the four-bar structure at any position within the rotation range of the four-bar.

[0067] In order to prevent the removal of the hydrogenation gun 8 during refueling from causing the entire filling arm skeleton balance structure to become unstable, a damping mechanism is provided at the shaft box assembly 3 to balance the weight reduction when the hydrogenation gun is removed.

[0068] The rotating shaft box 7 is also provided with a damping assembly, which includes a slow-descent plate 77 and a brake 78. The brake 78 clamps the outer edge of the slow-descent plate 77 to damp the rotation of the rotating structure.

[0069] Preferably, there are at least two brakes 78 , which are relatively arranged on both sides of the outer edge of the slow-descent plate 77 and fixed on the box frame 72 of the shaft box 7 .

[0070] The descending plate 77 is connected to the center of gravity position on the inner arm assembly 4 through the support flange 76 to form a rotating structure. Preferably, the support flange 76 passes through the inner ring of the second rotary support structure 75 and is connected to the center of gravity position on the inner arm assembly 4.

[0071] When the hydrogenation gun 8 is removed from the hydrogenation gun mounting seat 106, the gravity at the tail end of the outer arm assembly 5 is reduced, and at this time, the brake 78 clamps the outer edge of the slow-down plate 77 to slow down the rotation of the rotating structure, thereby slowing down the descending speed of the outer arm assembly 5, making the four-bar structure more balanced and stable.

[0072] Example 4

[0073] On the basis of the above-mentioned embodiment, this embodiment provides a marine hydrogen filling system, comprising: the above-mentioned marine hydrogen filling arm and a hydrogen filling machine arranged on the shore, and the hydrogen filling machine is connected to the input end of the hydrogen filling hose 6.

[0074] Figure 7 It is a schematic diagram of a marine hydrogen filling arm in a reset state. The filling arm frame is fixed on the shore foundation through a column 1, and the four-link structure is completely retracted in the reset state.

[0075] Figure 8 This is a schematic diagram of a ship's hydrogen filling arm crossing the guardrail. Fig.11 As shown, the inner arm assembly 4 is driven to rotate around the hinge point O to a certain angle, driving the tail end of the outer arm assembly 5 to cross the guardrail 11 and move toward the bunkering ship.

[0076] Fig. 9It is a schematic diagram of a marine hydrogen filling arm during filling. The ship to be filled is stopped within the envelope of the marine hydrogen filling arm. After the outer arm assembly 5 crosses the guardrail 11, the inner arm assembly 4 continues to rotate around the hinge point O, driving the angles and heights of the outer arm assembly 5, the counterweight assembly 2 and the balance assembly 3 to change, so that the four-bar structure gradually unfolds. The tail end of the outer arm assembly 5 is close to the ship to be filled, and the hydrogen filling gun 8 is lowered to the ship's filling port. The operator on the ship removes the hydrogen filling gun 8 and connects it to the ship's filling port for filling.

[0077] Fig.10 Schematic diagram of the marine hydrogen filling arm at the maximum working range. When the inner arm assembly 4 continues to rotate around the hinge point O toward the direction close to the filling ship to the maximum rotation angle, the tail end of the outer arm assembly 5 simultaneously drops to the lowest position. At this time, the tail end of the outer arm assembly 5 is in the maximum working range of the marine hydrogen filling arm. After the filling is completed, the traction point on the pulling balance assembly 2 is pulled, and the inner arm assembly 4 moves around the hinge point O toward the direction away from the filling ship, driving the four-bar structure to collapse and return to the Figure 7 Reset state shown.

[0078] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Suitable for marine hydrogen filling arms with large water level differences, characterized by: include: Hydrogenation unit and filling arm framework; The filling arm skeleton comprises a counterweight assembly, a balance assembly, an inner arm assembly and an outer arm assembly, which are connected in pairs through a rotating assembly to form a four-bar structure, and the center of gravity of the four-bar structure is located on the inner arm assembly; The hydrogen filling device comprises a hydrogen filling hose, and the hydrogen filling hose is arranged along the inner arm assembly and the outer arm assembly.

2. The marine hydrogen filling arm according to claim 1, characterized in that: It also includes: a column and a rotating shaft box, wherein the bottom of the column is fixedly arranged; The rotating shaft box is rotatably connected to the top end of the column through a first slewing support mechanism; The rotating shaft box is rotatably connected to the center of gravity position on the inner arm assembly through a second slewing support mechanism.

3. The marine hydrogen filling arm according to claim 2, characterized in that: The rotating shaft box further comprises a damping assembly, and the damping assembly comprises a slow-descent disc and a brake; The slow-descent plate is connected to the center of gravity position on the inner arm assembly through a support flange to form a rotating structure; The brake is used to clamp the outer edge of the slow-descent plate to damp the rotation of the rotating structure.

4. The marine hydrogen filling arm according to claim 3, characterized in that: There are at least two brakes. The two brakes are arranged oppositely on both sides of the slow-descent plate and fixed on the rotating shaft box.

5. The marine hydrogen filling arm according to claim 1, characterized in that: The hydrogenation device further comprises a hydrogenation gun, the input end of which is connected to the output end of the hydrogen filling hose.

6. The marine hydrogen filling arm according to claim 5, characterized in that: It also includes a telescopic tube assembly, one end of which is connected to the tail end of the outer arm assembly, and the other end of which is provided with a hydrogenation gun mounting seat for accommodating the hydrogenation gun.

7. The marine hydrogen filling arm according to claim 5, characterized in that: Also includes: A breakaway valve is provided on the hydrogen filling hose.

8. The marine hydrogen filling arm according to claim 6, characterized in that: The telescopic tube assembly comprises an inner cylinder, an outer cylinder and a tension spring arranged in the inner cylinder. The inner cylinder and the outer cylinder are both provided with an opening and a plug. The plug of the inner cylinder is connected to the tail end of the outer arm assembly, and the opening of the inner cylinder passes through the opening of the outer cylinder and is sleeved in the outer cylinder; The two ends of the tension spring are respectively connected to the plug of the inner cylinder and the plug of the outer cylinder; The outer cylinder is provided with the hydrogenation gun mounting seat.

9. The marine hydrogen filling arm according to claim 1, characterized in that: The inner arm assembly and the outer arm assembly are both planar truss structures.

10. Marine hydrogen filling system, characterized in that: include: A hydrogenator for providing hydrogen fuel and a marine hydrogen filling arm as claimed in any one of claims 1 to 9, wherein the hydrogenator is connected to the input end of the hydrogen filling hose.

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