Liquid hydrogen filling system

Abstract

The liquid hydrogen filling system comprises a liquid-phase interface and a gas-phase interface and a medium pipeline connected at the back, the liquid-phase interface and the gas-phase interface are fixed on the two sides of a two-layer moving platform which can realize Y-direction movement, a fixed plate moving in Z direction is arranged on the platform, the two-layer moving platform is installed on a one-layer moving platform which can realize X-direction movement, and the moving platform realizes movement through an oil cylinder and a track, the present application has the advantages that: through the X, Y and Z direction movement of the moving platform, the three-dimensional movement of the flanges can be adjusted, the cables and the hydraulic pipelines are arranged in the swing arm to move following, and universal wheels are arranged at the connection of the two swing arms; after the liquid hydrogen tank is in place, the visual recognition device can automatically recognize and connect, manual connection is not needed, the work efficiency is improved, through the setting of the anti-icing mechanism, the contact surface of the two flanges is continuously swept when the low-temperature medium is transmitted, the outer circle of the flanges is kept dry and does not freeze, manual deicing is not needed when the flanges are separated, the flanges can be directly prevented from freezing, and the conveying efficiency is improved.

Description

Technical Field

[0001] The present invention relates to liquid hydrogen filling, in particular to a liquid hydrogen filling system, and belongs to the technical field. Background Art

[0002] In recent years, my country's development of hydrogen energy has been continuously improving. When transporting and storing liquid hydrogen, a liquid hydrogen filling system is needed to achieve better filling effects.

[0003] However, during the current liquid hydrogen filling operation, most of the pipelines cannot be moved freely, which limits the filling process. At the same time, manual flange docking operations are required, and when transmitting low-temperature media, flanges are prone to icing, which affects the transportation efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a liquid hydrogen filling system.

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

[0006] The liquid hydrogen filling system of the present invention includes a liquid phase interface and a gas phase interface, wherein the liquid phase interface and the gas phase interface are respectively fixedly connected to the fixed plates of two groups of two-layer mobile platforms, the two groups of fixed plates are respectively fixed to the two groups of two-layer mobile platforms through sliding blocks and Z-direction movable guide rails, the two groups of two-layer mobile platforms are fixed to the first-layer mobile platform through sliding blocks and Y-direction movable guide rails, and the first-layer mobile platform is fixed to the ground through sliding blocks and guide rails. A hydraulic substation is fixedly connected to one side of the top of the Y-direction movable rail, two groups of quick connection mechanisms are installed at the liquid phase interface and the gas phase interface, and an anti-icing mechanism is provided on one side of the quick connection mechanism. Two columns are symmetrically provided on one side of the two X-direction movable rails away from the liquid phase interface and the gas phase interface, and universal wheels are provided on the other side opposite to the two columns. The top of the universal wheel is fixedly connected to a connecting bracket, and two swing arms are provided on the top of the universal wheel. Both swing arms are rotatably connected to the connecting bracket, and the bottom end of the swing arm on the side of the universal wheel away from the two X-direction movable rails is fixedly connected to a fixed support.

[0007] As a preferred technical solution of the present invention, the quick connection mechanism includes a valve body, a sealing ring is connected to the bottom end of the valve body, a rotating device is installed on the surface of the valve body, three sets of support ears are fixedly connected to the bottom end of the rotating device, and the two clamping mechanism support ears are fixedly connected to the clamping mechanism at one end away from the rotating device. The three sets of clamping mechanisms are rotatably connected to the claws at one end away from the rotating device, and the three sets of claws are rotatably connected to the valve body through a rotating shaft.

[0008] As a preferred technical solution of the present invention, the top of the rotating device is fixedly connected to a cylinder support ear, one side of the cylinder support ear is provided with a cylinder, the output end of the cylinder is connected to the cylinder support ear through a rotating shaft, the top of the cylinder is rotatably connected to a cylinder support, and the other end of the cylinder support is fixedly connected to the rotating device.

[0009] As an optimal technical solution of the present invention, the anti-icing mechanism is through a purge pipeline and a purge ring. The end of the purge pipeline close to the liquid phase interface and the gas phase structure is connected to the purge ring, and the end of the purge pipeline away from the purge ring is fixedly connected to a connecting pipe.

[0010] As a preferred technical solution of the present invention, one end of the column close to the two X-direction movable rails is bolted to a fixed tube, and a rotary joint is provided on the side of the fixed tube away from the column, and both ends of the rotary joint are rotatably connected to process pipelines, one process pipeline and the fixed tube are rotatably connected through the rotary joint, and the other process pipeline is fixedly connected to the connecting pipe, and a nitrogen lubrication system is installed inside the rotary joint.

[0011] As a preferred technical solution of the present invention, each group of the Z-direction moving rails is composed of two Z-direction moving rails, and the top of the Z-direction moving rail near the liquid phase interface and the gas phase interface is bolted with a visual recognition device, and a Z-direction hydraulic cylinder is provided between the two Z-direction moving rails, and the bottom end of the Z-direction hydraulic cylinder is fixedly connected to the second-layer moving platform, and the output end of the Z-direction hydraulic cylinder is connected to a fixed plate, and the fixed plate is connected to the Z-direction moving guide rail through a sliding block, and the top of the fixed plate is symmetrically fixedly connected to two elastic supports, and a sliding block is slidably connected to the Y-direction moving rail, and the sliding block is fixedly connected to the second-layer moving platform.

[0012] As a preferred technical solution of the present invention, two Y-direction hydraulic cylinders are installed between the two Y-direction moving rails, the output end of each group of the Y-direction hydraulic cylinders is fixedly connected to the bottom of the second-layer moving platform, the two second-layer moving platforms are fixed to the sliding block, the sliding block is connected to the moving guide rail, and the moving guide rail is fixed on the first-layer moving platform to realize the Y-direction movement of the second-layer moving platform, and the output ends of the two Y-direction hydraulic cylinders are in opposite directions.

[0013] As a preferred technical solution of the present invention, an X-direction hydraulic cylinder is provided between the two X-direction moving rails, the output end of the X-direction hydraulic cylinder is fixedly connected to the bottom of a layer of moving platform, and the layer of moving platform is connected to the moving guide rail through a sliding block to realize the X-direction movement of the layer of moving platform.

[0014] The beneficial effects achieved by the present invention are:

[0015] By setting up X, Y, and Z moving tracks, the docking flange can be adjusted to perform three-dimensional movement according to different docking requirements. When the liquid hydrogen tank is in place, the docking flange operation can be automatically identified through the visual recognition device, so that manual docking is not required, thereby improving work efficiency. At the same time, through the setting of the anti-icing mechanism, the contact surfaces of the two flanges are continuously purged when transmitting low-temperature media, so that the outer ring of the flange remains dry and free of ice, avoiding the traditional method of manual deicing, and thus directly preventing the connecting flange from icing, thereby improving transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the main structure of the quick connection mechanism of the present invention;

[0019] Figure 3 2. It is a schematic diagram of the top view of the quick connection mechanism of the present invention;

[0020] Figure 4 This is a schematic structural diagram of the quick connection mechanism of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the anti-icing mechanism of the present invention.

[0022] In the figure: 1. Liquid phase interface; 2. Gas phase interface; 3. X-axis moving track; 4. Y-axis moving track; 5. Z-axis moving track; 6. Quick connection mechanism; 7. Process pipeline; 8. Rotary joint; 9. Column; 10. Fixed support; 11. Universal wheel; 12. Swing arm; 13. Hydraulic substation; 14. Nitrogen lubrication system for rotary joint; 15. Y-axis hydraulic cylinder; 16. Z-axis hydraulic cylinder; 17. Elastic support; 18. Visual recognition device; 19. Anti-icing mechanism; 20. X-axis hydraulic cylinder; 21. Clamping mechanism; 22. Clamping mechanism support ear; 23. Rotating device; 24. Valve body; 25. Claw; 26. Sealing ring; 27. Cylinder support; 28. Cylinder; 29. ​​Cylinder support ear; 30. Purge pipeline; 31. Purge ring; 32. Connecting pipe; 33. Fixed plate; 34. First-layer mobile platform; 35. Second-layer mobile platform. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figures 1-5 As shown, this embodiment provides a liquid hydrogen filling system, including a liquid phase interface 1 and a gas phase interface 2, wherein the gas phase interface 2 and the liquid phase interface 1 are respectively fixed on the fixed plates 33 on the left and right two-layer mobile platforms 35, and the left and right two-layer mobile platforms 35 are mounted on the first-layer mobile platform 34 through the mobile track 4, and the first-layer mobile platform 34 is mounted on the ground through the mobile track 3, and the two fixed plates 33 perpendicular to the Z direction are respectively mounted on the second-layer mobile platform 35 through the mobile track 5, and the liquid phase interface 1 and the gas phase interface 2 are respectively installed with quick connection Mechanism 6, an anti-icing mechanism 19 is provided on one side of the quick connection mechanism 6, two columns 9 are symmetrically provided on the side of the two X-direction movable rails 3 away from the liquid phase interface 1 and the gas phase interface 2, and a universal wheel 11 is provided on the other side opposite to the two columns 9. The top of the universal wheel 11 is fixedly connected to a connecting bracket, and two swing arms 12 are provided on the top of the universal wheel 11. The two swing arms 12 are rotatably connected to the connecting bracket, and the bottom end of the swing arm 12 on the side of the universal wheel 11 away from the two X-direction movable rails 3 is fixedly connected to a fixed support 10.

[0026] Specifically, when the present invention is used, since X, Y, and Z movable rails are installed, the docking flange is adjusted to perform three-dimensional movement, and the flange interface is driven to move by the cylinders 15, 16, and 20. Therefore, when the liquid hydrogen tank is in place, the target flange is first identified and positioned by the visual recognition device 18. At the same time, the cylinders 15, 16, and 20 are equipped with built-in displacement sensors, so that the interface flange of the filling system can be positioned, and finally the flange is driven to automatically dock with the target flange through the control system.

[0027] When the liquid hydrogen tank flange needs to be connected, the quick connection mechanism 6 includes a valve body 24, the bottom end of the valve body 24 is connected to a sealing ring 26, and a rotating device 23 is installed on the surface of the valve body 24. The bottom end of the rotating device 23 is fixedly connected to three sets of support ears 22, and the three sets of support ears 22 are fixedly connected to a clamping mechanism 21 at one end away from the rotating device 23. The three sets of clamping mechanisms 21 are rotatably connected to the claws 25 at one end away from the rotating device 23. The three sets of claws 25 are all rotatably connected to the valve body 24 through a rotating shaft. The top of the rotating device 23 is fixedly connected to a cylinder support ear 29, and a cylinder 28 is provided on one side of the cylinder support ear 29. The output end of the cylinder 28 is connected to the cylinder support ear 29 through a rotating shaft. The top of the cylinder 28 is rotatably connected to a cylinder support 27, and the other end of the cylinder support 27 is fixedly connected to the rotating device 23.

[0028] Since the quick connector adopts PLC control, oil cylinder drive and spring compression, the equipment runs reliably and stably. The electrical control system and hydraulic system are attached to the electro-hydraulic system of the liquid hydrogen filling system. When in use, the claw 25 is in the maximum open state under the control of the electrical and hydraulic system through the connection device. The quick connector can be aligned with the flange of the liquid hydrogen tank through the guide plate, and the two flange surfaces are tightly attached. Then, the hydraulic system is controlled by the electrical control system to start the oil cylinder 28 to drive the slewing ring in the slewing mechanism to rotate, thereby driving the lower end of the clamping mechanism 21 to rotate together, driving the clamping mechanism 21 to push the claw 25 to rotate around the pin shaft, so that the bayonet is tightly attached to the flange end of the liquid hydrogen tank. When the axis of the clamping mechanism 21 coincides with the axis of the valve body 24, the spring load is maximum. When the axis of the clamping mechanism 21 passes through the center line relative to the clamping claw 25 and reaches the self-locking angle (making the clamping mechanism 21 in a self-locking state), the oil cylinder 28 reaches its stroke and the slewing ring stops rotating. At this time, the load generated by the spring and the pressure applied to the flange through the bayonet end face of the clamping claw 25 are not less than the clamping force of the sealing ring 26 required by the flange in the operating state. The entire clamping action is completed. At this position, the slewing ring will be restricted from rotating under the mechanical positioning device.

[0029] When the work is finished, first close the valve to cut off the medium flow between the liquid hydrogen tank and the liquid phase interface 1 and the gas phase interface 2, start the rotating cylinder 28 to push the slewing ring to rotate in the opposite direction, and at the beginning of the rotation, unload the spring, and continue to rotate the slewing ring. The clamping mechanism 21 drives the claw 25 to rotate, so that the claw 25 is disengaged and opened to the full position. At this time, the liquid hydrogen filling system drives the quick connection device to separate from the liquid phase interface 1 and the gas phase interface 2.

[0030] In order to achieve the anti-icing effect, the anti-icing mechanism 19 is connected to the purge ring 31 at one end of the purge pipeline 30 close to the liquid phase interface 1 and the gas phase interface 2, and the end of the purge pipeline 30 away from the purge ring 31 is fixedly connected to the connecting pipe 32.

[0031] During use, the dry gas is delivered to the purge ring 31 through the purge pipeline 30. Since the nozzle of the purge ring 31 is facing the outer ring of the connecting flange, the contact surface of the two flanges can be continuously purged when the low-temperature medium is transmitted, so that the outer ring of the flange remains dry and free of ice, avoiding the traditional method of manual deicing, and thus directly preventing the connecting flange from icing, thereby improving the transportation efficiency.

[0032] Example 2

[0033] See also Figure 1 , further improvements were made on the basis of Example 1:

[0034] Two elastic supports 17 are symmetrically fixedly connected to the top of the fixed plate 33, and a sliding block is slidably connected to the Y-direction movable track 4, and the sliding block is interconnected with the fixed plate 33 and the movable guide rail.

[0035] By disposing the elastic support 17 , the movement errors of the moving tracks in the X, Y and Z directions can be compensated, thus not affecting normal use.

[0036] A visual recognition device 18 is bolted to the top of the Z-direction moving track 5 near the liquid phase interface 1 and the gas phase interface 2 .

[0037] By providing the visual recognition device 18 , the docking flange can be automatically identified and positioned, eliminating the need for manual positioning and docking, thereby improving work efficiency.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Liquid hydrogen filling system, characterized in that: The invention comprises a liquid phase interface (1) and a gas phase interface (2), wherein the gas phase interface (2) and the liquid phase interface (1) are respectively fixed on fixed plates (33) on two left and right two-layer mobile platforms (35), the left and right two-layer mobile platforms (35) are installed on a first-layer mobile platform (34) via a Y-direction moving track (4), the first-layer mobile platform (34) is installed on the ground via an X-direction moving track (3), two fixed plates (33) perpendicular to the Z direction are respectively installed on the second-layer mobile platform (35) via two groups of Z-direction moving tracks (5), the liquid phase interface (1) and the gas phase interface (2) are respectively installed with a quick connection mechanism (6), one side of the quick connection mechanism (6) is provided with an anti-icing mechanism (19), two columns (9) are symmetrically provided on one side of the two X-direction moving tracks (3) away from the liquid phase interface (1) and the gas phase interface (2), and universal wheels (11) are provided on the other side of the two columns (9). The top of the universal wheel (11) is fixedly connected to a connecting bracket, and two swing arms (12) are provided on the top of the universal wheel (11), and the two swing arms (12) are rotatably connected to the connecting bracket. The bottom end of the swing arm (12) on the side of the universal wheel (11) away from the two X-direction moving rails (3) is fixedly connected to a fixed support (10), and the quick connection mechanism (6) includes a valve body (24), the bottom end of the valve body (24) is connected to a sealing ring (26), and a rotating device (23) is installed on the surface of the valve body (24), and the bottom end of the rotating device (23) is fixedly connected to three sets of supporting ears (22), and one end of the three sets of supporting ears (22) away from the rotating device (23) is connected to a clamping mechanism (21), and one end of the three sets of clamping mechanisms (21) away from the rotating device (23) is rotatably connected to a claw (25), and the three sets of claws (25) are rotatably connected to the valve body (24) through a rotating shaft; The top of the rotary device (23) is fixedly connected to a cylinder support ear (29), one side of the cylinder support ear (29) is provided with a cylinder (28), the output end of the cylinder (28) is connected to the cylinder support ear (29) via a rotating shaft, the top of the cylinder (28) is rotatably connected to a cylinder support (27), and the other end of the cylinder support (27) is fixedly connected to the rotary device (23); The anti-icing mechanism (19) comprises a purge line (30) and a purge ring (31), wherein one end of the purge line (30) close to the liquid phase interface (1) and the gas phase interface (2) is connected to the purge ring (31), and one end of the purge line (30) away from the purge ring (31) is fixedly connected to a connecting pipe (32); Each group of Z-direction moving rails (5) is composed of two Z-direction moving rails (5), and the top of the Z-direction moving rail (5) near the liquid phase interface (1) and the gas phase interface (2) is bolted with a visual recognition device (18), and a Z-direction hydraulic cylinder (16) is provided between the two Z-direction moving rails (5), and the bottom end of the Z-direction hydraulic cylinder (16) is fixedly connected to the second-layer moving platform (35), and the output end of the Z-direction hydraulic cylinder (16) is connected to the fixed plate (33), and the fixed plate (33) is connected to the Z-direction moving rail (5) through a sliding block, and the top of the fixed plate (33) is symmetrically fixedly connected to two elastic supports (17), and a sliding block is slidably connected to the Y-direction moving rail (4), and the sliding block is fixedly connected to the second-layer moving platform (35).

2. The liquid hydrogen filling system according to claim 1, characterized in that: The ends of the columns (9) close to the two X-direction movable rails (3) are bolted to fixed pipes, and a rotary joint (8) is provided on the side of the fixed pipe away from the columns (9). Both ends of the rotary joint (8) are rotatably connected to process pipelines (7), one process pipeline (7) and the fixed pipe are rotatably connected via the rotary joint (8), and the other process pipeline (7) is fixedly connected to the connecting pipe (32). A nitrogen lubrication system (14) is installed inside the rotary joint (8).

3. The liquid hydrogen filling system according to claim 1, characterized in that: Two Y-direction hydraulic cylinders (15) are installed between the two Y-direction moving rails (4), and the output end of each Y-direction hydraulic cylinder (15) is fixedly connected to the bottom of the second-layer moving platform (35). The two second-layer moving platforms (35) are fixed to the sliding block, and the sliding block is connected to the Y-direction moving rail (4). The Y-direction moving rail (4) is fixed on the first-layer moving platform (34) to realize the Y-direction movement of the second-layer moving platform (35). The output ends of the two Y-direction hydraulic cylinders (15) are in opposite directions.

4. The liquid hydrogen filling system according to claim 1, characterized in that: An X-direction hydraulic cylinder (20) is provided between the two X-direction movable rails (3), and an output end of the X-direction hydraulic cylinder (20) is fixedly connected to the bottom of a first-layer movable platform (34). The first-layer movable platform (34) is connected to the X-direction movable rail (3) via a sliding block, thereby realizing X-direction movement of the first-layer movable platform (34).

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