Accurate control device for filling and metering of bus hydrogen refueling station

Abstract

The utility model relates to the technical field of hydrogen energy public transportation, in particular to a bus hydrogen refueling station filling metering accurate control device which comprises a shell and a cooling device, a conveying pipe is installed in the shell, the cooling device is installed on the outer wall of the conveying pipe, one end of the conveying pipe penetrates through the side wall of the shell to be connected with a hose, and the other end of the conveying pipe is connected with a water pump. A filling gun is installed at the end of the hose, a controller is installed on the outer wall of the shell, cooling liquid in the cooling box is pumped by the circulating pump and enters the cooling pipe through the liquid inlet pipe, the cooling pipe is tightly attached to the outer wall of the conveying pipe, and when the cooling liquid flows through the cooling pipe, heat of hydrogen in the conveying pipe can be taken away, so that the temperature of the hydrogen is reduced, and the cooling effect is improved. By precooling the hydrogen, heat generated by gas compression in the hydrogenation process is reduced, the hydrogen is precooled before filling, volume expansion caused by temperature rise in the filling process is reduced, and therefore the accuracy of the filling amount is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen energy public traffic technical field, concretely is a kind of bus hydrogen filling station filling measurement precision control device. BACKGROUND

[0002] It is known that with the enhancement of environmental awareness and the increasing demand for renewable energy, hydrogen energy as a clean energy has been widely concerned, in the field of hydrogen energy transportation, as an important part of urban public transportation, the construction and development of hydrogen filling station of bus are crucial, however, the existing hydrogen filling station has the problem of insufficient filling accuracy, which leads to inefficient and unsafe hydrogen fuel supplement.

[0003] In the traditional bus hydrogen filling station, when high-pressure hydrogen gas is rapidly transmitted from the hydrogen storage tank to the hydrogen storage system of the vehicle, due to gas compression and flow friction, significant temperature rise will occur, which not only leads to an increase in hydrogen pressure, but also may cause thermal stress of the hydrogen storage tank material, thereby affecting its structural integrity and safety, in addition, high temperature will also cause the volume expansion of hydrogen, resulting in a decrease in the amount of hydrogen actually injected into the vehicle, reducing the filling efficiency, and may cause the problem of insufficient or excessive filling, affecting the cruising range and operation scheduling of the bus. SUMMARY

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the utility model provides a bus hydrogen filling station filling measurement precision control device.

[0006] (II) Technical scheme

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a bus hydrogen filling station filling measurement precision control device, comprising a shell and a cooling device, the inside of the shell is provided with a transmission pipe, the outer wall of the transmission pipe is provided with the cooling device, one end of the transmission pipe penetrates the side wall of the shell and is connected with a hose, the end of the hose is provided with a filling gun, the outer wall of the shell is provided with a controller, the outer wall of one end of the transmission pipe close to the hose is provided with a solenoid valve, the cooling device comprises a cooling pipe, a liquid inlet pipe, a liquid outlet pipe, a cooling box, a circulating pump and a heat preservation shell, the outer wall of the transmission pipe is provided with the cooling pipe, one end of the cooling pipe is provided with the liquid inlet pipe, the other end of the cooling pipe is provided with the liquid outlet pipe, the bottom wall of the shell is provided with the cooling box, the top wall of the cooling box is connected with the liquid outlet pipe and the liquid inlet pipe respectively at left and right ends, the outer wall of the liquid inlet pipe is provided with a circulating pump, and the outer wall of the cooling pipe is provided with the heat preservation shell.

[0008] Preferably, the inner wall of the transmission pipe is provided with a pressure sensor, a temperature and humidity sensor and a flowmeter.

[0009] Preferably, the utility model discloses an improvement has, the hose is installed with the safety pull valve away from the one end of the filling gun.

[0010] Preferably, the utility model discloses an improvement has, the hose is installed with the overpressure protector away from the one end of the filling gun.

[0011] Preferably, the utility model discloses an improvement has, the top wall of the shell is installed with the gas alarm.

[0012] Preferably, the utility model discloses an improvement has, the top wall of the shell is installed with the buzzer.

[0013] Preferably, the utility model discloses an improvement has, the cooling pipe is installed in the outer wall of the transmission pipe.

[0014] Preferably, the utility model discloses an improvement has, the one end of the cooling box is installed with the filling pipe, and the sealing cover is installed on the filling pipe.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a kind of bus hydrogenation station filling metering precision control device, with following beneficial effects:

[0017] The bus hydrogenation station filling metering precision control device, by the cooling device being set, the temperature of hydrogen in transmission pipe can be effectively reduced, and the temperature rise due to gas compression can be reduced when low-temperature hydrogen is injected into vehicle hydrogen storage tank, which helps to keep hydrogen pressure stable, prevent security risks caused by temperature rise, and pre-cool hydrogen reduces the heat generated due to gas compression in the filling process, so that hydrogen can be filled into vehicle hydrogen storage tank more quickly, thereby shorten hydrogenation time and improve the efficiency of bus hydrogenation. Hydrogen is pre-cooled before filling, which can reduce the volume expansion due to temperature rise during filling, ensure more accurate filling amount, and avoid the problems of insufficient or excessive filling caused by thermal expansion. DETAILED DESCRIPTION

[0018] Figure 1 It is main structure schematic diagram of the utility model;

[0019] Figure 2 It is hidden after stereoscopic structure schematic diagram of the shell of the utility model;

[0020] Figure 3 It is hidden after stereoscopic structure schematic diagram of the heat preservation shell of the utility model;

[0021] Figure 4 It is half cut stereoscopic structure schematic diagram of the transmission pipe of the utility model.

[0022] In the figure: 1, the shell; 2, transmission pipe; 3, hose; 4, filling gun; 5, controller; 6, electromagnetic valve; 7, cooling pipe; 8, inlet pipe; 9, outlet pipe; 10, cooling box; 11, circulating pump; 12, insulation shell; 13, pressure sensor; 14, temperature and humidity sensor; 15, flow meter; 16, safety pull-off valve; 17, overvoltage protector; 18, gas alarm; 19, buzzer; 20, filling pipe; 21, sealing cover. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Please refer to Figures 1-4The utility model provides a kind of bus hydrogenation station filling metering precision control device, including shell 1 and cooling device, the inside of the shell 1 is equipped with transmission pipe 2, the outer wall of the transmission pipe 2 is equipped with the cooling device, one end of the transmission pipe 2 is connected with hose 3 and penetrates the lateral wall of the shell 1, the end of the hose 3 is equipped with filling gun 4, the outer wall of the shell 1 is equipped with controller 5, the outer wall of one end of the transmission pipe 2 is equipped with solenoid valve 6, and the cooling device includes cooling pipe 7, liquid inlet pipe 8, liquid outlet pipe 9, cooling box 10, circulating pump 11 and heat preservation shell 12, the outer wall of the transmission pipe 2 is equipped with the cooling pipe 7, one end of the cooling pipe 7 is equipped with the liquid inlet pipe 8, the other end of the cooling pipe 7 is equipped with the liquid outlet pipe 9, the bottom wall of the shell 1 is equipped with the cooling box 10, and the top wall of the cooling box 10 is connected with the liquid outlet pipe 9 and the liquid inlet pipe 8 respectively left and right ends, the outer wall of the liquid inlet pipe 8 is equipped with circulating pump 11, and the outer wall of the cooling pipe 7 is equipped with the heat preservation shell 12, in the embodiment, when using, the device is installed in bus hydrogenation station, transmission pipe 2 is connected with hydrogen cylinder, before starting hydrogenation, ensure that cooling box 10 (realize refrigeration by compressor and condenser) has started and is in normal working condition, cooling liquid (such as ethylene glycol aqueous solution) in cooling box 10 is extracted by circulating pump 11 and enters cooling pipe 7 by liquid inlet pipe 8, and cooling pipe 7 is closely combined on the outer wall of transmission pipe 2, when cooling liquid flows through cooling pipe 7, the heat of hydrogen in transmission pipe 2 is taken away, to reduce the temperature of hydrogen, operator connects filling gun 4 at the end of hose 3 to the hydrogen storage tank interface of the bus to be hydrogenated, at this time, solenoid valve 6 keeps closed state, to prevent hydrogen from flowing out accidentally, when filling gun 4 is correctly connected with vehicle, operator issues instruction by controller 5, solenoid valve 6 opens, allows high-pressure hydrogen to flow from transmission pipe 2 in shell 1 to hose 3, and finally enters the hydrogen storage tank of vehicle, simultaneously, cooling system continues to operate, ensures that the temperature of hydrogen keeps in safe range during filling, avoids the increase of pressure or material damage due to temperature rise, and the opening of solenoid valve 6 and the flow of cooling system are adjusted according to need, to optimize filling speed and guarantee safety, when reaching preset hydrogenation amount or vehicle hydrogen storage tank is full, controller 5 will automatically close solenoid valve 6, stop hydrogenation, by precooling hydrogen, reduce the heat generated due to gas compression during hydrogenation, so that hydrogen can be filled into vehicle hydrogen storage tank more quickly, shorten hydrogenation time, precool hydrogen before filling, reduce the volume expansion due to temperature rise during filling, to improve the accuracy of filling amount.

[0025] In this embodiment, the inner wall of the transmission pipe 2 is preferably equipped with a pressure sensor 13, a temperature and humidity sensor 14, and a flow meter 15. The pressure sensor 13 can detect the pressure of hydrogen gas, and the temperature and humidity sensor 14 can help monitor the moisture content and temperature of hydrogen gas. By installing these sensors inside the transmission pipe 2, continuous monitoring of hydrogen temperature, pressure, and humidity can be achieved. If an abnormal situation is detected (such as overpressure, overheating, or excessive humidity), the system can immediately take measures, such as closing the electromagnetic valve 6, to prevent accidents.

[0026] In this embodiment, the end of the hose 3 away from the filling gun 4 is preferably equipped with a safety pull-off valve 16. When the vehicle moves unexpectedly or the operator does not disconnect the filling gun 4 correctly, the safety pull-off valve 16 can automatically disconnect when subjected to excessive pulling force, preventing the hose 3 from being pulled and broken or causing hydrogen leakage, which greatly reduces potential safety hazards and protects personnel and equipment safety. The safety pull-off valve 16 is designed with a self-sealing function, which will immediately close the valve and quickly cut off the hydrogen flow once separation occurs, preventing hydrogen from continuing to flow out and reducing the risk of fire or explosion.

[0027] In this embodiment, the end of the hose 3 away from the filling gun 4 is preferably equipped with an overpressure protector 17. The overpressure protector 17 can automatically close when the system pressure exceeds the set safety limit, preventing high-pressure hydrogen from continuing to flow and avoiding serious accidents such as pipe rupture, valve damage, or hydrogen tank explosion caused by overpressure.

[0028] In this embodiment, the top wall of the housing 1 is preferably equipped with a gas alarm 18. The gas alarm 18 can monitor the hydrogen concentration in the hydrogen filling station in real time and immediately alert the operator and surrounding personnel to take emergency measures to prevent potential fire or explosion accidents once hydrogen leakage is detected. Through high-sensitivity sensors, the gas alarm 18 can issue an alarm when the hydrogen concentration has not yet reached a dangerous level, providing early warning and allowing sufficient time for workers to handle the situation and prevent it from escalating.

[0029] In this embodiment, the other end of the top wall of the housing 1 is preferably equipped with a buzzer 19. The buzzer 19 can immediately issue a high-decibel sound alarm when an abnormal situation is detected (such as hydrogen leakage, overpressure, excessive temperature, or other faults), quickly attracting the attention of the operator and surrounding personnel and ensuring they can take action in a timely manner.

[0030] Preferably, in the embodiment, the cooling pipe 7 is spirally installed on the outer wall of the transmission pipe 2, and the spirally installed cooling pipe 7 can significantly increase the contact area with the outer wall of the transmission pipe 2, thereby more effectively transferring heat, and more contact area means better heat exchange effect, ensuring that the hydrogen can be sufficiently cooled when passing through the transmission pipe 2, and the spiral structure enables the cooling liquid to exchange heat with the outer wall of the transmission pipe 2 over a longer distance, avoiding the phenomenon of local overcooling or overheating, and ensuring that the temperature distribution of the hydrogen is more uniform during the entire transmission process.

[0031] Preferably, in the embodiment, one end of the cooling box 10 is provided with a filling pipe 20, and the filling pipe 20 is provided with a sealing cover 21, the filling pipe 20 provides a special entrance, making it more convenient and fast to fill the cooling liquid, without the need to disassemble or move other components, and the operator only needs to open the sealing cover 21 to fill, greatly simplifying the maintenance process.

[0032] In order to explain the possible application scenarios, technical principles, specific schemes that can be implemented, purposes and effects that can be achieved, etc. of the present application, the specific embodiments listed below are combined with the drawings for detailed description. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0033] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A bus hydrogen refueling station filling metering precision control device, comprising a shell (1) and a cooling device, characterized in that: The inside of the shell (1) is provided with a transmission pipe (2), the outer wall of the transmission pipe (2) is provided with the cooling device, one end of the transmission pipe (2) penetrates through the side wall of the shell (1) and is connected with a hose (3), the end of the hose (3) is provided with a filling gun (4), the outer wall of the shell (1) is provided with a controller (5), the outer wall of one end of the transmission pipe (2) close to the hose (3) is provided with a solenoid valve (6), the cooling device comprises a cooling pipe (7), a liquid inlet pipe (8), a liquid outlet pipe (9), a cooling box (10), a circulating pump (11) and a heat preservation shell (12), the outer wall of the transmission pipe (2) is sleeved with the cooling pipe (7), one end of the cooling pipe (7) is provided with the liquid inlet pipe (8), the other end of the cooling pipe (7) is provided with the liquid outlet pipe (9), the bottom wall of the shell (1) is provided with the cooling box (10), the top wall of the cooling box (10) is respectively connected with the liquid outlet pipe (9) and the liquid inlet pipe (8), the outer wall of the liquid inlet pipe (8) is provided with the circulating pump (11), and the outer wall of the cooling pipe (7) is provided with the heat preservation shell (12). ​ 2. The bus hydrogen refueling station filling metering precision control device according to claim 1, characterized in that: The inner side wall of the transmission pipe (2) is provided with a pressure sensor (13), a temperature and humidity sensor (14) and a flow meter (15).

3. The bus hydrogen refueling station filling metering precision control device according to claim 2, characterized in that: The end of the hose (3) away from the filling gun (4) is provided with a safety pull-off valve (16).

4. The bus hydrogen refueling station filling metering precision control device according to claim 3, characterized in that: The end of the hose (3) away from the filling gun (4) is provided with an overvoltage protector (17).

5. The bus hydrogen refueling station filling metering precision control device according to claim 4, characterized in that: One end of the top wall of the shell (1) is provided with a gas alarm (18).

6. The bus hydrogen refueling station filling metering precision control device according to claim 5, characterized in that: The other end of the top wall of the shell (1) is provided with a buzzer (19).

7. The bus hydrogen refueling station filling metering precision control device according to claim 6, characterized in that: The cooling pipe (7) is spirally installed on the outer wall of the transmission pipe (2).

8. The bus hydrogen refueling station filling metering precision control device according to claim 7, characterized in that: One end of the cooling box (10) is provided with a filling pipe (20), and the filling pipe (20) is provided with a sealing cover (21).

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