Leak-proof liquid hydrogen filling head

Abstract

The utility model relates to the technical field of liquid hydrogen filling heads, in particular to a leakproof liquid hydrogen filling head which comprises a filling head body, the periphery of the filling head body is fixedly connected with a mounting seat through a fastener, the periphery of the mounting seat is fixedly provided with a suction cup and is provided with an air exhaust part connected with the suction cup, and the air exhaust part is connected with the suction cup. The air exhaust part is used for being matched with the suction cup to fix the filling head body in a filling port. Wherein the air exhaust part comprises air exhaust rods and a locking part, the locking part is used for fixing the air exhaust rods and driving the pair of air exhaust rods to move at the same time, then the suction cup and the outer wall of the filling port are tightly sucked through the air exhaust rods, the air exhaust rods are fixed through an elastic locking piece, and therefore the two hands of a worker can be liberated, and the labor intensity of the worker is relieved. In addition, the sealing gasket abuts against the outer wall of the filling port through the suction force of the suction cup, it is guaranteed that fuel cannot leak, the structure is simple, operation is easy and convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid hydrogen filling heads, in particular to a leakage-proof liquid hydrogen filling head. Background Art

[0002] Liquid hydrogen filling heads are devices used to fill liquid hydrogen into hydrogen energy vehicles or equipment. Liquid hydrogen filling heads usually have high pressure, low temperature and explosion-proof characteristics to ensure the safe delivery of liquid hydrogen to the vehicle's fuel storage container. These devices play a key role in the hydrogen energy industry to promote the development and promotion of hydrogen fuel cell vehicles.

[0003] In order to prevent the fuel from being discharged during filling, a leak-proof liquid hydrogen filling head is required to prevent the fuel from being discharged. For example, the prior art Chinese patent announcement number "CN220082823U" discloses a leak-proof liquid hydrogen filling head, which relates to the field of liquid hydrogen filling head body, including a filling head body, a sealing ring is arranged around the outer ring of the filling head body, an annular box body is fixedly arranged on the inner ring of the sealing ring, the annular box body is movably fitted on the outer ring of the filling head body, and an internal chamber is arranged inside the annular box body. The utility model has an annular box body fixedly arranged on the inner ring of the sealing ring, the annular box body is movably fitted on the outer ring of the filling head body, an internal chamber is arranged inside the annular box body, and a vacuum is maintained in the internal chamber. The annular box body has a certain heat insulation effect, which prevents the first rubber ring from being affected by the temperature difference, increases the service life of the first rubber ring, and the use of the first rubber ring can better seal the position where the filling head body is inserted into the fuel tank port.

[0004] Some leak-proof liquid hydrogen filling heads prevent fuel leakage during filling by pressing the rubber pad against the outer wall of the filling port. However, in actual operation, considering similar operating methods, it is necessary to manually push the filling head hard to ensure that the rubber pad on the filling head can press against the outer wall of the filling port. This requires manual force to be applied to the filling head continuously, which is prone to fatigue over a long period of time. Fatigue may also cause the filling head to slide and displace, and then it is impossible to ensure that the fuel does not leak, and the practicality is poor. Utility Model Content

[0005] The utility model aims to solve the disadvantage in the prior art that the filling head needs to be pushed hard by humans for a long time and is prone to fatigue, and proposes a leak-proof liquid hydrogen filling head.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A leak-proof liquid hydrogen filling head is designed, comprising a filling head body, the periphery of the filling head body is fixedly connected to a mounting seat by a fastener, a suction cup is fixedly mounted on the periphery of the mounting seat, and a suction piece connected to the suction cup is provided, the suction piece is used to cooperate with the suction cup to fix the filling head body in the filling port;

[0008] Wherein, the suction member includes a suction rod and a locking member, and the locking member is used to fix the suction rod.

[0009] Furthermore, a mounting ring is fixedly mounted on the other end of the periphery of the mounting seat, the outer wall of the mounting ring is tightly fixed to the back opening of the suction cup, and a cavity is formed between the mounting ring and the back opening of the suction cup.

[0010] Furthermore, a sealing gasket is fixedly connected to the side of the mounting ring through a ring groove, and a plurality of vent holes are arranged in a circular array next to the sealing gasket, the vent holes are communicated with the cavity, and the suction cup is tightly sucked against the outer wall of the filling port so that the sealing gasket can be pressed against the outer wall of the filling port.

[0011] Furthermore, the vacuum component also includes a vacuum cylinder fixedly installed on both sides of the mounting seat, one end of the vacuum cylinder is fixedly connected to the suction cup and communicated with the cavity, and the vacuum rod is slidably connected inside it, and one end of the vacuum rod is fixedly connected to a piston head, and the piston head fits tightly against the inner wall of the vacuum cylinder.

[0012] Furthermore, a connecting piece is fixedly connected between the other ends of the pair of air pumping rods, and the two rods move synchronously through the connecting piece.

[0013] Furthermore, the locking member includes an elastic locking plate, a sliding groove is provided on the side of the vacuum cylinder, the elastic locking plate is slidably connected in the sliding groove, and a recessed groove is provided at the bottom thereof, and a pair of locking grooves are provided on both sides of the other end of the vacuum rod, and the recessed grooves are U-shaped and can be plugged into the locking grooves.

[0014] The utility model proposes a leakage-proof liquid hydrogen filling head, which has the beneficial effect that: the utility model drives a pair of vacuum rods to move simultaneously through a connecting piece, and then uses the vacuum rods to suck the suction cup and the outer wall of the filling port tightly, and uses elastic locking sheets to fix the vacuum rods, so that workers can free their hands and will not feel powerless in their arms due to pushing the filling head for a long time, and uses the suction force of the suction cup to make the sealing gasket press against the outer wall of the filling port to ensure that the fuel will not leak. The utility model has a simple structure, easy operation and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of area A;

[0018] Figure 4 This is a schematic diagram of the structure of the vacuum pump of the utility model;

[0019] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area B.

[0020] In the figure: 1. filling head body; 2. fastener; 3. mounting seat; 31. mounting ring; 32. cavity; 33. sealing gasket; 34. vent; 4. suction cup; 5. vacuum part; 51. vacuum rod; 52. vacuum cylinder; 53. piston head; 54. connecting part; 6. locking part; 61. elastic locking piece; 62. slide groove; 63. recessed groove; 64. locking groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-5 A leak-proof liquid hydrogen filling head, comprising a filling head body 1, the outer periphery of the filling head body 1 is fixedly connected to a mounting seat 3 through a fastener 2, a suction cup 4 is fixedly mounted on the outer periphery of the mounting seat 3, and a suction piece 5 connected to the suction cup 4 is provided, the suction piece 5 is used to cooperate with the suction cup 4 to fix the filling head body 1 in the filling port;

[0023] The suction member 5 includes a suction rod 51 and a locking member 6 , and the locking member 6 is used to fix the suction rod 51 .

[0024] It should be added that the fastener 2 is a locking bolt, which is threadedly connected to the mounting seat 3 and the filling head body 1. The mounting seat 3 can be disassembled through the fastener 2, which makes it easier to replace and maintain the mounting ring 31 and the suction cup 4.

[0025] Furthermore, a mounting ring 31 is fixedly mounted on the other end of the outer periphery of the mounting seat 3 , the outer wall of the mounting ring 31 is tightly fixed to the back opening of the suction cup 4 , and a cavity 32 is formed between the mounting ring 31 and the back opening of the suction cup 4 .

[0026] Furthermore, a sealing gasket 33 is fixedly connected to the side of the mounting ring 31 through a ring groove, and a plurality of vent holes 34 are arranged in a circular array next to the sealing gasket 33. The vent holes 34 are communicated with the cavity 32. The suction cup 4 is tightly sucked against the outer wall of the filling port so that the sealing gasket 33 can be pressed tightly.

[0027] It is worth mentioning that the cavity 32 can prevent the mounting seat 3 from blocking the opening of the air extraction cylinder 52. When the suction cup 4 and the sealing gasket 33 are pressed against the outer wall of the filling port, the suction cup 4 is evacuated by the air extraction member 5, so that the suction cup 4 is tightly attached to the outer wall of the filling port to ensure that the filling head body 1 will not be separated from the filling port.

[0028] The suction force generated by the suction cup 4 is used to ensure that the sealing gasket 33 can be pressed against the outer wall of the filling port, so as to prevent the fuel from leaking and the filling head body 1 from sliding;

[0029] Specifically, one side of the sealing gasket 33 is disposed at the periphery of the mounting ring 31 , so as to ensure that the outer wall of the filling port can contact the sealing gasket 33 instead of the mounting ring 31 .

[0030] In more detail, the vacuum component 5 also includes a vacuum cylinder 52 fixedly installed on both sides of the mounting base 3, one end of the vacuum cylinder 52 is fixedly connected to the suction cup 4 and communicates with the cavity 32, and the vacuum rod 51 is slidably connected inside it, and one end of the vacuum rod 51 is fixedly connected to a piston head 53, and the piston head 53 is tightly fitted to the inner wall of the vacuum cylinder 52.

[0031] In general, a connecting member 54 is fixedly connected between the other ends of the pair of air pumping rods 51 , and the two exhaust rods 51 move synchronously through the connecting member 54 .

[0032] It is worth mentioning that the pair of the air pumping rods 51 can be operated to pump and exhaust air synchronously through the connecting member 54 , and the pair of the air pumping rods 51 can be fixed by using one elastic locking piece 61 .

[0033] Finally, the locking member 6 includes an elastic locking piece 61, a slide groove 62 is provided on the side of the vacuum cylinder 52, the elastic locking piece 61 is slidably connected in the slide groove 62, and a recessed groove 63 is provided at the bottom thereof, and a pair of locking grooves 64 are provided on both sides of the other end of the vacuum rod 51, and the recessed groove 63 is in a U-shaped structure and can be plugged into the locking groove 64.

[0034] It should be noted that the elastic locking piece 61 is made of an elastomer material, which is a material with good elasticity and flexibility, and can be deformed under the action of force and return to its original shape after the force is removed;

[0035] Among them, common elastic materials include: rubber, silicone or polyurethane, and the locking grooves 64 on both sides are correspondingly arranged, and the width between the pair of locking grooves 64 facing each other, that is, the width of the air pumping rod 51 is greater than the width of the opening of the recessed groove 63, ensuring that the recessed groove 63 can clamp the air pumping rod 51 through the locking groove 64;

[0036] Specifically, fixing the vacuum rod 51 by the elastic locking piece 61 can ensure that the suction cup 4 can suck the outer wall of the filling port tightly on the one hand, and can free the operator's hands on the other hand to avoid the sliding of the filling head body 1 caused by arm fatigue due to long-term force application.

[0037] Working method: When working, the filling head body 1 is placed into the filling port, and the suction cup 4 and the sealing gasket 33 will be pressed against the outer wall of the filling port;

[0038] At this time, the connecting piece 54 is pulled to make the pair of air extraction rods 51 move synchronously to extract air, and the suction cup 4 is sucked tightly against the outer wall of the filling port by the air extraction rods 51, and the sealing gasket 33 is pressed against the outer wall of the filling port to ensure that the fuel will not be discharged;

[0039] After the air extraction rod 51 is pulled to a suitable position, the elastic locking piece 61 is pressed to make the recessed groove 63 plug into the locking groove 64 to achieve the effect of fixing the pair of air extraction rods 51 .

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A leak-proof liquid hydrogen filling head, comprising a filling head body (1), characterized in that: The outer periphery of the filling head body (1) is fixedly connected to a mounting seat (3) via a fastener (2); a suction cup (4) is fixedly mounted on the outer periphery of the mounting seat (3); and a suction piece (5) connected to the suction cup (4) is provided, wherein the suction piece (5) is used to cooperate with the suction cup (4) to fix the filling head body (1) in the filling port; Wherein, the air extraction member (5) comprises an air extraction rod (51) and a locking member (6), and the locking member (6) is used to fix the air extraction rod (51).

2. The leak-proof liquid hydrogen filling head according to claim 1, characterized in that: A mounting ring (31) is fixedly mounted on the other end of the periphery of the mounting seat (3); the outer wall of the mounting ring (31) is tightly fixed to the back opening of the suction cup (4), and a cavity (32) is formed between the mounting ring and the back opening of the suction cup (4).

3. The leak-proof liquid hydrogen filling head according to claim 2, characterized in that: A sealing gasket (33) is fixedly connected to the side of the mounting ring (31) through a ring groove, and a plurality of vent holes (34) are arranged in a circumferential array beside the sealing gasket (33), the vent holes (34) are communicated with the cavity (32), and the suction cup (4) is tightly sucked against the outer wall of the filling port so that the sealing gasket (33) can be pressed against the outer wall of the filling port.

4. The leak-proof liquid hydrogen filling head according to claim 3, characterized in that: The vacuum member (5) further comprises a vacuum cylinder (52) fixedly mounted on both sides of the mounting seat (3); one end of the vacuum cylinder (52) is fixedly connected to the suction cup (4) and communicates with the cavity (32); and the vacuum rod (51) is slidably connected thereto; one end of the vacuum rod (51) is fixedly connected to a piston head (53); and the piston head (53) is tightly fitted to the inner wall of the vacuum cylinder (52).

5. The leak-proof liquid hydrogen filling head according to claim 1, characterized in that: A connecting piece (54) is fixedly connected between the other ends of the pair of air pumping rods (51), and they move synchronously via the connecting piece (54).

6. The leak-proof liquid hydrogen filling head according to claim 4, characterized in that: The locking member (6) comprises an elastic locking plate (61), a sliding groove (62) is provided on the side of the vacuum cylinder (52), the elastic locking plate (61) is slidably connected in the sliding groove (62), and a recessed groove (63) is provided at the bottom thereof, and a pair of locking grooves (64) are provided on both sides of the other end of the vacuum rod (51), and the recessed groove (63) is in a U-shaped structure and can be plugged into the locking groove (64).

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