Hydrogen oil filling device with stored oil recovery function

Abstract

The invention discloses a hydrogen oil filling device with an oil storage and recovery function, and relates to the technical field of hydrogen oil filling, the hydrogen oil filling device comprises a filling mechanism, a liquid storage mechanism and a recovery mechanism, the filling mechanism is communicated with the liquid storage mechanism through a pipeline, the filling mechanism is communicated with the recovery mechanism through a pipeline, the filling mechanism comprises a filling gun, and the filling gun comprises a clamping assembly. The clamping assembly comprises a pushing ring, and one face of the pushing ring inclines inwards. Pressure generated when liquid hydrogen flows is transmitted to the isolation diaphragm, so that the isolation diaphragm deforms, hydraulic oil is pressed and then extrudes the inclined face of the pushing ring, longitudinal pressure is converted into axial pressure through the inclined face, the hydraulic oil extrudes the pushing ring towards the flange, good sealing performance is generated between the flange and a ship connector, and the sealing effect is good. And the sealing performance can be changed along with the pressure change generated by the flowing of the liquid hydrogen, so that the hydrogen leakage caused by insufficient sealing performance is prevented, and the flange and a ship interface are prevented from being damaged due to overlarge sealing performance.

Description

Technical Field

[0001] This invention relates to the field of hydrogen oil refueling technology, specifically a hydrogen oil refueling device with oil storage and recovery functions. Background Technology

[0002] To reduce the environmental impact of global shipping, liquid hydrogen fuel is gradually becoming the preferred power source for new energy shipping, and more and more ships are using liquid hydrogen as fuel. Currently, the most commonly used hydrogen storage device is the high-pressure hydrogen storage cylinder. However, ships require a huge amount of hydrogen, and refueling through hydrogen storage cylinders is not practical. Many hydrogen refueling stations and oil storage and recycling stations are located on land, so ships need to sail to shore to refuel. When refueling a ship, hydrogen needs to be transported from a shore-based hydrogen refueling machine to a hydrogen refueling nozzle, and then the hydrogen is refueled into the ship using the hydrogen refueling nozzle.

[0003] When docking the hydrogen refueling nozzle with the ship, it usually requires manual operation. When hydrogen is delivered to the ship, a relatively high pressure needs to be maintained to keep the interface between the hydrogen refueling nozzle and the ship sealed. However, the pressure of hydrogen delivery is constantly changing. If the force between the hydrogen refueling nozzle and the ship interface is insufficient, the seal will be inadequate and hydrogen will easily leak. If the force between the hydrogen refueling nozzle and the ship interface is too high, it will be more likely to be damaged after repeated use. Summary of the Invention

[0004] The purpose of this invention is to provide a hydrogen oil refueling device with oil storage and recovery function to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A hydrogen oil filling device with oil storage and recovery function, the hydrogen oil filling device includes a filling mechanism, a liquid storage mechanism, and a recovery mechanism, the filling mechanism and the liquid storage mechanism are connected by pipelines, and the filling mechanism and the recovery mechanism are connected by pipelines.

[0007] The dispensing mechanism includes a dispensing gun, which includes a clamping assembly, which includes a push ring, one side of which is tilted.

[0008] The refueling mechanism is used to connect to the ship's interface and refuel with hydrogen oil. The storage mechanism is used to store unrefueled liquid hydrogen. The recovery mechanism is used to recover the hydrogen gas generated during the transportation of liquid hydrogen. Liquid hydrogen is transported from the storage mechanism to the refueling gun, and then transported through the connection between the refueling gun and the ship's interface. The clamping assembly is used to adjust the seal between the refueling gun and the ship's interface. During the transportation of liquid hydrogen, internal pressure is generated on the outer wall of the pipe. The pressure direction is perpendicular to the transportation direction. By adjusting the pressure adjustment push ring, the pressure direction, which was originally perpendicular to the transportation direction, becomes consistent with the transportation direction due to the tilt of one side of the push ring, thereby maintaining the seal between the refueling gun and the ship's interface.

[0009] Furthermore, the material of the driving ring is rubber.

[0010] Because the push ring is made of rubber, it is elastic. When the pressure generated by the liquid hydrogen delivery is transmitted to the push ring, the push ring undergoes elastic deformation. The tilted side is thrust, so the other side of the push ring is pressed tightly towards the ship interface. When no liquid hydrogen is being delivered, no pressure is generated, and the push ring returns to its original deformation, no longer pressing tightly towards the ship interface. Furthermore, the pressure generated during liquid hydrogen delivery is constantly changing, and the push ring is subjected to different levels of pressure, which can adjust the seal between the refueling gun and the ship interface, thereby improving the efficiency of liquid hydrogen refueling.

[0011] Furthermore, the clamping assembly includes an outer tube, an isolation diaphragm, and a flange. The push ring is placed inside the outer tube, and the outer tube and flange are fastened together. The side of the push ring away from the flange is tilted inward, and the side of the push ring close to the flange abuts against the flange.

[0012] During liquid hydrogen transport, the pressure generated on the pipeline wall is transmitted to the outermost diaphragm. Simultaneously, the space between the diaphragm and the push ring is filled with hydraulic oil. The diaphragm deforms under pressure, causing the hydraulic oil to be pressurized and squeezed against the inclined surface of the push ring. Through the inclined surface, the longitudinal pressure is converted into axial pressure. Since one side of the push ring abuts against the flange, the hydraulic oil pushes the push ring towards the flange. Because the push ring is made of elastic rubber, it can create a good seal between the flange and the ship interface. The seal can change with the pressure generated by the liquid hydrogen flow, which can prevent hydrogen leakage due to insufficient sealing and prevent damage to the flange and ship interface due to excessive sealing.

[0013] Furthermore, the filling gun also includes a connector assembly and a delivery tube. The delivery tube passes through the connector assembly and the outer tube. An isolation diaphragm is fitted around the outer ring of the delivery tube. The flange and the connector assembly are fastened together. The connector assembly includes a tube and a snap fastener. Several snap fasteners are provided on the inner ring of the tube. The tube and the flange are fastened together.

[0014] When liquid hydrogen flows, the pressure generated towards the wall of the delivery pipe is transmitted to the isolation diaphragm on the outer ring of the delivery pipe, thereby adjusting the seal between the clamping assembly and the ship interface. During filling, the connector assembly and the delivery pipe can be inserted into the ship interface, the flange and the ship interface abut, and the insert is fixed on one side of the flange. When the insert is inserted into the ship interface, the buckle enters the ship interface and matches the groove inside the ship interface, thereby achieving initial locking.

[0015] Furthermore, the filling gun also includes a housing and a liquid injection valve, which are fastened together. A delivery pipe passes through the housing and is connected to the liquid injection valve. The housing and the outer tube are also fastened together.

[0016] The outer casing is used to fix the injection valve and protect the internal delivery pipe. The pipes connecting the delivery pipe and the injection valve are connected. When the injection valve is opened, liquid hydrogen enters the delivery pipe through the injection valve and then enters the ship.

[0017] Furthermore, the filling mechanism also includes a filling arm and a filling pile. The filling arm is placed on the filling pile, the filling pile is connected to the liquid storage mechanism via a pipeline, and the filling arm is connected to the liquid injection valve via a pipeline.

[0018] The filling pile is used to temporarily store liquid hydrogen, and the filling arm is used to connect the liquid hydrogen storage device on shore to the ship on the water. The liquid storage mechanism can transfer the liquid hydrogen inside to the filling pile, the filling pile then transfers the liquid hydrogen to the filling arm, and finally the liquid hydrogen is transferred to the filling valve.

[0019] Furthermore, the injection arm includes a robotic arm and an infusion tube, which are fastened together. The robotic arm is fixed above the injection pile, and the infusion tube is connected to the injection pile pipeline. One end of the infusion tube is connected to the injection valve pipeline, and the other end of the infusion tube is connected to the recovery mechanism pipeline.

[0020] A robotic arm is fixed above the filling pile. Liquid hydrogen is output from the filling pile into the delivery pipe and then into the injection valve. Since the delivery pipe is fixed to the robotic arm, the robotic arm can move the delivery pipe and the end of the filling gun to accurately reach the position of the ship interface and insert the filling gun into the ship interface.

[0021] Furthermore, the filling pile includes a liquid storage tank and a liquid outlet pipe, the liquid storage tank and the liquid outlet pipe are connected, the liquid storage tank and the liquid storage mechanism are connected, a mechanical arm is installed above the liquid storage tank, and the liquid outlet pipe is connected to the recovery mechanism.

[0022] Liquid hydrogen is transferred from the storage mechanism to the storage tank for temporary storage. Then, it is transferred to the delivery pipe through the outlet pipe. A recovery mechanism is connected between the outlet pipe and the delivery pipe to recover the hydrogen generated during the transfer process and prevent it from being released into the air during hydrogen addition.

[0023] Furthermore, the liquid storage mechanism includes a liquid hydrogen tank, a liquid hydrogen pump, a liquid delivery valve, and a hydrogen delivery pipeline. The liquid hydrogen tank and the hydrogen delivery pipeline are connected, the liquid hydrogen pump and the hydrogen delivery pipeline are connected, the liquid delivery valve and the hydrogen delivery pipeline are connected, and the hydrogen delivery pipeline and the liquid storage tank are connected.

[0024] Liquid hydrogen tanks are used to store hydrogen in liquid form. Liquid hydrogen pumps increase the pressure inside the pipeline, causing liquid hydrogen to flow from the liquid hydrogen tank into the hydrogen delivery pipeline. The delivery valve is used to control whether liquid hydrogen can flow. When the delivery valve is open, liquid hydrogen flows in the hydrogen delivery pipeline until it flows into the storage tank.

[0025] Furthermore, the recovery mechanism includes a three-way valve, a hydrogen tank, and a gas transmission pipeline. The three-way valve is connected to the liquid delivery pipe, the liquid outlet pipe, and the gas transmission pipeline, respectively, and the hydrogen tank is connected to the gas transmission pipeline.

[0026] The inlet and outlet pipes are equipped with three-way valves, so that a small amount of hydrogen gas generated during the flow of liquid hydrogen from the inlet pipe to the outlet pipe can enter the gas pipeline through the three-way valve and finally enter the hydrogen tank for storage. This can effectively recover hydrogen gas and prevent hydrogen gas from escaping into the air or entering the ship with liquid hydrogen during hydrogen refueling.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: When liquid hydrogen flows, the pressure generated towards the wall of the delivery pipe is transmitted to the isolation diaphragm on the outer ring of the delivery pipe. The space between the isolation diaphragm and the push ring is filled with hydraulic oil. The isolation diaphragm deforms under pressure, causing the hydraulic oil to be pressurized and squeezed towards the inclined surface of the push ring. Through the inclined surface, the longitudinal pressure is converted into axial pressure. Since one side of the push ring abuts against the flange, the hydraulic oil squeezes the push ring towards the flange. Because the push ring is made of rubber and has elasticity, it can create a good seal between the flange and the ship interface. Moreover, the seal can change with the pressure generated by the liquid hydrogen flow. This can prevent hydrogen leakage due to insufficient seal and also prevent damage to the flange and ship interface due to excessive seal. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the filling gun of the present invention;

[0030] Figure 3 for Figure 2 A magnified view of part A of the view;

[0031] Figure 4 This is a cross-sectional view of the clamping assembly of the present invention;

[0032] Figure 5 This is a schematic diagram of the filling and recycling mechanisms of the present invention;

[0033] Figure 6 for Figure 5 A magnified view of part B in the view;

[0034] Figure 7 This is a schematic diagram of the liquid storage mechanism of the present invention.

[0035] In the diagram: 1. Filling mechanism; 11. Filling gun; 111. Clamping assembly; 1111. Outer tube; 1112. Isolation diaphragm; 1113. Push ring; 1114. Flange; 112. Connecting assembly; 1121. Insert tube; 1122. Snap-fit; 113. Delivery pipe; 114. Outer shell; 115. Injection valve; 12. Filling arm; 121. Robotic arm; 122. Delivery pipe; 13. Filling pile; 131. Storage tank; 132. Discharge pipe; 2. Storage mechanism; 21. Liquid hydrogen tank; 22. Liquid hydrogen pump; 23. Delivery valve; 24. Hydrogen delivery pipeline; 3. Recovery mechanism; 31. Three-way valve; 32. Hydrogen tank; 33. Gas delivery pipeline. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example: Figures 1-7 As shown, the present invention provides a technical solution for a hydrogen oil refueling device with oil storage and recovery function.

[0038] like Figures 1-4 As shown, a hydrogen oil filling device with oil storage and recovery function is provided. The hydrogen oil filling device includes a filling mechanism 1, a liquid storage mechanism 2, and a recovery mechanism 3. The filling mechanism 1 and the liquid storage mechanism 2 are connected by pipes, and the filling mechanism 1 and the recovery mechanism 3 are connected by pipes.

[0039] The dispensing mechanism 1 includes a dispensing gun 11, the dispensing gun 11 includes a clamping assembly 111, the clamping assembly 111 includes a push ring 1113, and the push ring 1113 is tilted to one side.

[0040] The refueling mechanism 1 is used to connect to the ship's interface and refuel with hydrogen oil. The storage mechanism 2 is used to store unrefueled liquid hydrogen. The recovery mechanism 3 is used to recover the hydrogen gas generated during the transportation of liquid hydrogen. Liquid hydrogen is transported from the storage mechanism 2 to the refueling gun 11, and then transported through the connection between the refueling gun 11 and the ship's interface. The clamping assembly 111 is used to adjust the sealing between the refueling gun 11 and the ship's interface. During the transportation of liquid hydrogen, internal pressure is generated on the outer wall of the pipe. The pressure direction is perpendicular to the transportation direction. The pressure adjustment push ring 1113 is used. Because one side of the push ring 1113 is tilted, the pressure direction that was originally perpendicular to the transportation direction becomes consistent with the transportation direction, thereby maintaining the sealing between the refueling gun 11 and the ship's interface.

[0041] like Figure 4 As shown, the material of the push ring 1113 is rubber.

[0042] Because the push ring 1113 is made of rubber, it is elastic. When the pressure generated by the liquid hydrogen delivery is transmitted to the push ring 1113, it undergoes elastic deformation. The tilted side is subjected to thrust, so the other side of the push ring 1113 is pressed tightly towards the ship interface. When no liquid hydrogen is being delivered, there is no pressure, and the push ring 1113 returns to its original deformation and is no longer pressed tightly towards the ship interface. Furthermore, the pressure generated during liquid hydrogen delivery is constantly changing, and the push ring 1113 is subjected to different degrees of pressure, which can adjust the sealing between the refueling gun 11 and the ship interface, thereby improving the efficiency of liquid hydrogen refueling.

[0043] like Figures 3-4 As shown, the clamping assembly 111 includes an outer tube 1111, an isolation diaphragm 1112, and a flange 1114. A push ring 1113 is placed inside the outer tube 1111. The outer tube 1111 and the flange 1114 are fastened together. The side of the push ring 1113 away from the flange 1114 is inclined inward, and the side of the push ring 1113 close to the flange 1114 abuts against the flange 1114.

[0044] During liquid hydrogen transport, pressure is generated on the pipe wall, which is transmitted to the outer diaphragm 1112. Simultaneously, the space between the diaphragm 1112 and the push ring 1113 is filled with hydraulic oil. The diaphragm 1112 deforms under pressure, causing the hydraulic oil to be pressurized and squeezed against the inclined surface of the push ring 1113. Through the inclined surface, the longitudinal pressure is converted into axial pressure. Since one side of the push ring 1113 abuts against the flange 1114, the hydraulic oil squeezes the push ring 1113 towards the flange 1114. Because the push ring 1113 is made of rubber and has elasticity, it can create a good seal between the flange 1114 and the ship interface. The seal can change with the pressure generated by the liquid hydrogen flow, which can prevent hydrogen leakage due to insufficient sealing and prevent damage to the flange 1114 and the ship interface due to excessive sealing.

[0045] like Figures 2-3 As shown, the filling gun 11 also includes a connector assembly 112 and a delivery pipe 113. The delivery pipe 113 passes through the connector assembly 112 and the outer pipe 1111. An isolation diaphragm 1112 is fitted around the outer ring of the delivery pipe 113. The flange 1114 is fastened to the connector assembly 112. The connector assembly 112 includes an insert tube 1121 and a snap fastener 1122. Several snap fasteners 1122 are provided on the inner ring of the insert tube 1121. The insert tube 1121 and the flange 1114 are fastened to each other.

[0046] When liquid hydrogen flows, the pressure generated towards the wall of the delivery pipe 113 is transmitted to the isolation diaphragm 1112 on the outer ring of the delivery pipe 113, thereby adjusting the seal between the clamping assembly 111 and the ship interface. During filling, the connector assembly 112 and the delivery pipe 113 can be inserted into the ship interface, the flange 1114 abuts against the ship interface, and the insert tube 1121 is fixed on one side of the flange 1114. When the insert tube 1121 is inserted into the ship interface, the buckle 1122 enters the ship interface and matches the groove inside the ship interface, thereby achieving initial locking.

[0047] like Figure 2 As shown, the filling gun 11 also includes a housing 114 and a liquid injection valve 115. The housing 114 and the liquid injection valve 115 are fastened together. The delivery pipe 113 passes through the housing 114. The delivery pipe 113 and the liquid injection valve 115 are connected. The housing 114 and the outer pipe 1111 are fastened together.

[0048] The outer casing 114 is used to fix the injection valve 115 and protect the internal delivery pipe 113. The pipes connected to the injection valve 115 are connected through the delivery pipe 113. When the injection valve 115 is opened, liquid hydrogen enters the delivery pipe 113 through the injection valve 115 and then enters the ship.

[0049] like Figure 1 As shown, the filling mechanism 1 also includes a filling arm 12 and a filling pile 13. The filling arm 12 is placed on the filling pile 13. The filling pile 13 is connected to the liquid storage mechanism 2 via a pipeline. The filling arm 12 is connected to the liquid injection valve 115 via a pipeline.

[0050] The filling pile 13 is used to temporarily store liquid hydrogen, and the filling arm 12 is used to connect the liquid hydrogen storage device on shore and the ship on the water. The liquid storage mechanism 2 can transfer the liquid hydrogen inside to the filling pile 13, the filling pile 13 then transfers the liquid hydrogen to the filling arm 12, and finally the liquid hydrogen is transferred to the filling valve 115.

[0051] like Figure 5 As shown, the filling arm 12 includes a robotic arm 121 and an infusion pipe 122. The robotic arm 121 and the infusion pipe 122 are fastened together. The robotic arm 121 is fixed above the filling pile 13. The infusion pipe 122 is connected to the filling pile 13. One end of the infusion pipe 122 is connected to the injection valve 115, and the other end of the infusion pipe 122 is connected to the recovery mechanism 3.

[0052] A robotic arm 121 is fixed above the filling pile 13. Liquid hydrogen is output from the filling pile 13 into the delivery pipe 122 and then into the injection valve 115. Since the delivery pipe 122 is fixed on the robotic arm 121, the robotic arm 121 can drive the delivery pipe 122 and the end filling gun 11 to move, thereby accurately reaching the position of the ship interface and inserting the filling gun 11 into the ship interface.

[0053] like Figures 5-6As shown, the filling pile 13 includes a liquid storage tank 131 and a liquid outlet pipe 132. The liquid storage tank 131 and the liquid outlet pipe 132 are connected by pipes. The liquid storage tank 131 is connected by pipes to the liquid storage mechanism 2. A mechanical arm 121 is provided above the liquid storage tank 131. The liquid outlet pipe 132 is connected by pipes to the recovery mechanism 3.

[0054] Liquid hydrogen is transferred from the storage mechanism 2 to the storage tank 131 for temporary storage, and then transferred to the delivery pipe 122 through the outlet pipe 132. A recovery mechanism 3 is connected between the outlet pipe 132 and the delivery pipe 122 to recover the hydrogen generated during the transfer process and prevent it from being released into the air during hydrogen addition.

[0055] like Figure 7 As shown, the liquid storage mechanism 2 includes a liquid hydrogen tank 21, a liquid hydrogen pump 22, a liquid delivery valve 23, and a hydrogen delivery pipeline 24. The liquid hydrogen tank 21 and the hydrogen delivery pipeline 24 are connected by pipes, the liquid hydrogen pump 22 and the hydrogen delivery pipeline 24 are connected by pipes, the liquid delivery valve 23 and the hydrogen delivery pipeline 24 are connected by pipes, and the hydrogen delivery pipeline 24 and the liquid storage tank 131 are connected by pipes.

[0056] Liquid hydrogen tank 21 is used to store liquid hydrogen. Liquid hydrogen pump 22 increases the pressure in the pipeline, causing liquid hydrogen to flow from liquid hydrogen tank 21 to hydrogen delivery pipeline 24. Delivery valve 23 is used to control whether liquid hydrogen can flow. When delivery valve 23 is opened, liquid hydrogen flows in hydrogen delivery pipeline 24 until it flows into storage tank 131.

[0057] like Figures 5-6 As shown, the recovery mechanism 3 includes a three-way valve 31, a hydrogen tank 32, and a gas transmission pipeline 33. The three-way valve 31 is connected to the liquid transmission pipe 122, the liquid outlet pipe 132, and the gas transmission pipeline 33, respectively. The hydrogen tank 32 is connected to the gas transmission pipeline 33.

[0058] The inlet pipe 122 and outlet pipe 132 are equipped with a three-way valve 31. So, during the flow of liquid hydrogen from the inlet pipe 122 to the outlet pipe 132, a small amount of hydrogen gas generated can enter the gas pipeline 33 through the three-way valve 31 and finally enter the hydrogen tank 32 for storage. This can effectively recover hydrogen gas and prevent hydrogen gas from escaping into the air or entering the ship with liquid hydrogen during the refueling of hydrogen oil.

[0059] Working principle of the invention:

[0060] Liquid hydrogen flows from liquid hydrogen tank 21 to storage tank 131 for temporary storage. It is then transferred through outlet pipe 132 to delivery pipe 122. A three-way valve 31 connects outlet pipe 132 and delivery pipe 122 to recover hydrogen generated during transport, preventing hydrogen from escaping into the air or entering the ship with the liquid hydrogen during refueling. The robotic arm 121 moves delivery pipe 122 and refueling gun 11 to the ship interface position. When injection valve 115 opens, liquid hydrogen enters delivery pipe 113. During refueling, flange 1114 abuts against the ship interface. When insertion tube 1121 is inserted into the ship interface, clip 1122 engages with the ship interface. The initial locking is achieved by matching the slots in the part. When liquid hydrogen flows, the pressure generated towards the wall of the delivery pipe 113 is transmitted to the isolation diaphragm 1112 on the outer ring of the delivery pipe 113. The isolation diaphragm 1112 deforms, causing the hydraulic oil to be pressurized and squeezed against the inclined surface of the push ring 1113. Through the inclined surface, the longitudinal pressure is converted into axial pressure, which can generate good sealing between the flange 1114 and the ship interface. The sealing can change with the pressure generated by the flow of liquid hydrogen. It can prevent hydrogen leakage due to insufficient sealing and also prevent damage to the flange 1114 and the ship interface due to excessive sealing.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydrogen oil refueling device with oil storage and recovery function, characterized in that: The hydrogen oil filling device includes a filling mechanism (1), a liquid storage mechanism (2), and a recovery mechanism (3). The filling mechanism (1) and the liquid storage mechanism (2) are connected by pipes, and the filling mechanism (1) and the recovery mechanism (3) are connected by pipes. The dispensing mechanism (1) includes a dispensing gun (11), the dispensing gun (11) includes a clamping assembly (111), the clamping assembly (111) includes a push ring (1113), the push ring (1113) is inclined on one side.

2. The hydrogen oil refueling device with oil storage and recovery function according to claim 1, characterized in that: The push ring (1113) is made of rubber.

3. The hydrogen oil refueling device with oil storage and recovery function according to claim 2, characterized in that: The clamping assembly (111) includes an outer tube (1111), an isolation diaphragm (1112), and a flange (1114). The push ring (1113) is placed inside the outer tube (1111). The outer tube (1111) and the flange (1114) are fastened together. The side of the push ring (1113) away from the flange (1114) is inclined inward. The side of the push ring (1113) close to the flange (1114) abuts against the flange (1114).

4. A hydrogen oil refueling device with oil storage and recovery function according to claim 3, characterized in that: The filling gun (11) also includes a connector assembly (112) and a delivery tube (113). The delivery tube (113) passes through the connector assembly (112) and the outer tube (1111). The outer ring of the delivery tube (113) is fitted with an isolation diaphragm (1112). The flange (1114) and the connector assembly (112) are fastened together. The connector assembly (112) includes a tube (1121) and a buckle (1122). The inner ring of the tube (1121) is provided with a plurality of buckles (1122). The tube (1121) and the flange (1114) are fastened together.

5. A hydrogen oil refueling device with oil storage and recovery function according to any one of claims 1 to 4, characterized in that: The filling gun (11) also includes a housing (114) and a liquid injection valve (115), the housing (114) and the liquid injection valve (115) are fastened together, the delivery pipe (113) passes through the housing (114), the delivery pipe (113) and the liquid injection valve (115) are connected in a pipeline, and the housing (114) and the outer tube (1111) are fastened together.

6. A hydrogen oil refueling device with oil storage and recovery function according to claim 5, characterized in that: The filling mechanism (1) also includes a filling arm (12) and a filling pile (13). The filling arm (12) is placed on the filling pile (13). The filling pile (13) is connected to the liquid storage mechanism (2) via a pipeline. The filling arm (12) is connected to the liquid injection valve (115) via a pipeline.

7. A hydrogen oil refueling device with oil storage and recovery function according to claim 6, characterized in that: The filling arm (12) includes a robotic arm (121) and an infusion tube (122). The robotic arm (121) and the infusion tube (122) are fastened together. The robotic arm (121) is fixed above the filling pile (13). The infusion tube (122) is connected to the filling pile (13). One end of the infusion tube (122) is connected to the injection valve (115). The other end of the infusion tube (122) is connected to the recovery mechanism (3).

8. A hydrogen oil refueling device with oil storage and recovery function according to claim 7, characterized in that: The filling pile (13) includes a liquid storage tank (131) and a liquid outlet pipe (132). The liquid storage tank (131) and the liquid outlet pipe (132) are connected by pipes. The liquid storage tank (131) and the liquid storage mechanism (2) are connected by pipes. A mechanical arm (121) is provided above the liquid storage tank (131). The liquid outlet pipe (132) and the recovery mechanism (3) are connected by pipes.

9. A hydrogen oil refueling device with oil storage and recovery function according to claim 8, characterized in that: The liquid storage mechanism (2) includes a liquid hydrogen tank (21), a liquid hydrogen pump (22), a liquid delivery valve (23), and a hydrogen delivery pipeline (24). The liquid hydrogen tank (21) and the hydrogen delivery pipeline (24) are connected by a pipeline. The liquid hydrogen pump (22) and the hydrogen delivery pipeline (24) are connected by a pipeline. The liquid delivery valve (23) and the hydrogen delivery pipeline (24) are connected by a pipeline. The hydrogen delivery pipeline (24) and the liquid storage tank (131) are connected by a pipeline.

10. A hydrogen oil refueling device with oil storage and recovery function according to claim 9, characterized in that: The recovery mechanism (3) includes a three-way valve (31), a hydrogen tank (32) and a gas transmission pipeline (33). The three-way valve (31) is connected to the liquid transmission pipe (122), the liquid outlet pipe (132) and the gas transmission pipeline (33) respectively. The hydrogen tank (32) and the gas transmission pipeline (33) are connected to each other.

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