High-pressure hydrogen storage container

Abstract

The utility model belongs to the technical field of magnesium hydride powder preparation, and particularly relates to a high-pressure hydrogen storage container which comprises a high-pressure tank body, the upper surface of the high-pressure tank body is of an opening structure, a heating assembly is arranged in the high-pressure tank body, and a servo motor is fixed to the lower surface of the high-pressure tank body. The output end of the servo motor extends into the high-pressure tank and is fixedly provided with a material carrying disc, a graphite crucible is inserted into the upper surface of the material carrying disc, a baffle is fixed to the inner side of the high-pressure tank, the lower surface of the baffle is parallel to the upper surface of the graphite crucible, one side of the high-pressure tank is fixedly communicated with an exhaust valve, and the other side of the high-pressure tank is provided with an air supply assembly. A sealing cover is assembled at an opening of the high-pressure tank body, the air supply assembly comprises an air compressor installed on one side of the high-pressure tank body, and an air outlet of the air compressor is connected to an air inlet of the high-pressure tank body The magnesium hydride powder can be shielded, negative pressure airflow and the magnesium hydride powder can be separated, and the magnesium hydride powder can be conveniently taken out and collected.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnesium hydride powder preparation, and in particular relates to a high-pressure hydrogen storage container. Background Art

[0002] There are mainly the following ways to prepare magnesium hydride powder, including ball milling, solution impregnation, gas phase method and arc heating method, etc. Among them, the arc heating method is to place magnesium metal in an arc heating chamber, heat it by arc to make it react, and react in an argon and hydrogen environment. The reaction products are collected by a collection system to obtain nano magnesium hydride powder.

[0003] In the traditional arc heating method, magnesium metal powder is placed in a graphite crucible and placed in an arc heating chamber. Argon and hydrogen are compressed by a high-pressure gas pump and then introduced into the arc heating chamber. After arc heating, the magnesium metal powder reacts with hydrogen to form magnesium hydride powder. After the reaction is completed, the excess gas in the arc heating chamber is collected by a collection system.

[0004] After preparing magnesium hydride powder by arc heating, a filter is installed on the outside of the exhaust pipe to intercept the magnesium hydride powder carried away by the negative pressure airflow. However, the filter fails to seal the graphite crucible, and the magnesium hydride powder will face the negative pressure airflow directly, so that part of the magnesium hydride powder may be scattered onto the inner wall of the arc heating chamber and the pipeline of the collection system, increasing the difficulty of collection. For this reason, we propose a high-pressure hydrogen storage container. Utility Model Content

[0005] The utility model aims to provide a high-pressure hydrogen storage container, which can shield magnesium hydride powder, separate negative pressure airflow and magnesium hydride powder, and facilitate taking out and collecting magnesium hydride powder.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A high-pressure hydrogen storage container comprises a high-pressure tank body, the upper surface of the high-pressure tank body is an open structure, a heating component is arranged inside the high-pressure tank body, a servo motor is fixed to the lower surface of the high-pressure tank body, an output end of the servo motor extends into the high-pressure tank body and a loading tray is fixed to the output end, a graphite crucible is inserted on the upper surface of the loading tray, a baffle is fixed inside the high-pressure tank body, the lower surface of the baffle is parallel to the upper surface of the graphite crucible, an exhaust valve is connected and fixed on one side of the high-pressure tank body, and a gas supply component is installed on the other side of the high-pressure tank body, a certain amount of magnesium metal powder is placed in the graphite crucible and put into the high-pressure tank body, the upper opening of the high-pressure tank body is closed, the exhaust valve is opened, and the gas supply component is started to first pass in excess argon gas to squeeze out the air in the high-pressure tank body, and then a certain amount of hydrogen gas is passed in to exhaust the argon gas, and then the gas supply component is closed. Exhaust valve and gas supply assembly, the internal pressure of the high-pressure tank reaches 2-5MPa, the heating assembly is started to generate an arc, the magnesium metal powder is heated to a temperature of >200°C in a hydrogen environment, so that part of the hydrogen reacts with the magnesium metal powder in a high temperature and high pressure environment to form magnesium hydride powder, finally, the heating assembly is controlled to stop heating and slowly cool down, the servo motor is started to drive the loading plate to rotate half a circle forward, the graphite crucible is moved to the bottom of the baffle, the magnesium hydride powder can be shielded, and argon is introduced into the high-pressure tank again, the hydrogen is squeezed out and discharged along the exhaust valve, so as to separate the negative pressure airflow in the exhaust valve from the magnesium hydride powder and reduce the scattered magnesium hydride powder, after the pressure is released, the upper opening of the high-pressure tank is opened, and the servo motor drives the loading plate to reverse half a circle, the graphite crucible is moved to stagger the baffle, and the magnesium hydride powder can be easily taken out and collected.

[0008] The opening of the high-pressure tank body is equipped with a sealing cover, and the sealing cover is equipped with a turntable. The sealing cover can be locked at the opening of the high-pressure tank body by forward rotation of the turntable, and the sealing cover can be opened by reverse rotation of the turntable.

[0009] The gas supply assembly includes an air compressor installed on one side of the high-pressure tank body, the air outlet of the air compressor is connected to the air inlet of the high-pressure tank body, and the air inlet of the air compressor is connected to a hydrogen tank and an argon tank. The hydrogen tank and the argon tank are selectively opened to pass argon or hydrogen into the high-pressure tank body, and the air compressor is started for pressurization. The pressurization range is adjustable within 2 to 5 MPa. After the reaction, the air compressor is shut down to slowly release the pressure.

[0010] The heating component includes an insulating tube fixed inside the high-pressure tank body, an electrode gun is axially inserted inside the insulating tube, the lower end of the electrode gun is in an inverted concave shape and suspended above the loading plate, and the upper end of the electrode gun extends out of the high-pressure tank body along the axial direction of the insulating tube. During the reaction, the high-voltage power supply is started, and the electrode gun is energized to generate an arc. The arc is used to heat the magnesium metal powder in the graphite crucible, which is convenient for avoiding the high-pressure tank body and concentrating the heat on the magnesium metal powder. The high-pressure tank body and the electrode gun are separated by the insulating tube to prevent conductivity. The part of the electrode gun exposed outside the high-pressure tank body is also wrapped with an insulating layer to prevent accidental electric shock.

[0011] The upper surface of the material loading plate is symmetrically provided with two grooves, one of which is used to hold the graphite crucible at its opening. The graphite crucible is limited by the groove to facilitate the graphite crucible to be stably placed horizontally, and will not deviate even if the servo motor rotates half a circle.

[0012] A heat insulation layer is fixed in the middle of the lower surface of the loading tray, and the side of the heat insulation layer away from the loading tray is fixedly connected to the output end of the servo motor. The heat insulation layer is used to separate the loading tray and the servo motor, thereby reducing the heat transferred from the loading tray to the servo motor, preventing the servo motor from being heated and causing temperature abnormalities, and facilitating the protection of the servo motor.

[0013] The technical effects achieved by the utility model are:

[0014] The utility model discloses a high-pressure hydrogen storage container. A graphite crucible is used to hold a quantitative amount of magnesium metal powder and put it into a high-pressure tank body. The opening on the high-pressure tank body is closed, the exhaust valve is opened, and the gas supply component is started to firstly introduce excess argon gas to squeeze out the air in the high-pressure tank body, and then a quantitative amount of hydrogen gas is introduced to exhaust the argon gas. At this time, the exhaust valve and the gas supply component are closed, and the internal pressure of the high-pressure tank body reaches 2-5MPa. The heating component is started to generate an arc, and the temperature of the magnesium metal powder is heated to more than 200°C in a hydrogen environment, so that part of the hydrogen reacts with the magnesium metal powder in a high-temperature and high-pressure environment to form Magnesium hydride powder, finally, control the heating component to stop heating and slowly cool down, start the servo motor to drive the loading plate to rotate half a circle forward, move the graphite crucible to just below the baffle, which can shield the magnesium hydride powder, and introduce argon gas into the high-pressure tank again, squeeze out the hydrogen and discharge it along the exhaust valve, which is convenient for separating the negative pressure airflow in the exhaust valve from the magnesium hydride powder and reducing the scattered magnesium hydride powder. After the pressure is released, open the opening on the high-pressure tank, and the servo motor drives the loading plate to reverse half a circle, and move the graphite crucible to stagger the baffle, which can facilitate the removal and collection of the magnesium hydride powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a high-pressure hydrogen storage container of the utility model;

[0016] Figure 2 It is a front view of the high-pressure tank of the utility model;

[0017] Figure 3 It is a cross-sectional view of the high-pressure tank of the utility model;

[0018] Figure 4 It is a cross-sectional view of the material loading tray of the utility model;

[0019] Figure 5 It is a front view of the electrode gun of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. High-pressure tank body; 2. Servo motor; 3. Loading tray; 4. Graphite crucible; 5. Baffle; 6. Exhaust valve; 7. Sealing cover; 8. Air compressor; 9. Hydrogen tank; 10. Argon tank; 11. Insulation tube; 12. Electrode gun; 13. Groove; 14. Insulation layer. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0023] like Figure 1-5 As shown, a high-pressure hydrogen storage container includes a high-pressure tank body 1, the volume of the high-pressure tank body 1 is not less than 100ml, which can meet the requirements of placing a smaller container, the upper surface of the high-pressure tank body 1 is an open structure, a heating component is arranged inside the high-pressure tank body 1, a servo motor 2 is fixed to the lower surface of the high-pressure tank body 1, the servo motor 2 can select a YEJ series three-phase asynchronous motor, and is controlled by a Mitsubishi series industrial computer, the output end of the servo motor 2 extends into the high-pressure tank body 1 and a loading tray 3 is fixed to the output end, a graphite crucible 4 is inserted on the upper surface of the loading tray 3, and a graphite crucible 4 is inserted on the upper surface of the loading tray 3. The crucible 4 is in the shape of a flat circular groove. A baffle 5 is fixed inside the high-pressure tank body 1. The lower surface of the baffle 5 is parallel to the upper surface of the graphite crucible 4. An exhaust valve 6 is connected and fixed to one side of the high-pressure tank body 1. A gas supply component is installed on the other side of the high-pressure tank body 1. The high-pressure tank body 1, the loading tray 3 and the graphite crucible 4 are cleaned before use. When storing hydrogen, a certain amount of magnesium metal powder is placed in the graphite crucible 4 and flattened. After flattening, the graphite crucible 4 is shallow and can increase the contact area with hydrogen. Then, the graphite crucible 4 is placed in the high-pressure tank body 1 from the upper opening, and is located on the loading tray 3 facing the heating component, and the graphite crucible 4 is sealed. The high-pressure tank body 1 is opened, the exhaust valve 6 is opened, and the gas supply component is started to first introduce excess argon gas to squeeze out the air in the high-pressure tank body 1, and then a certain amount of hydrogen is introduced to exhaust the argon gas. At this time, the exhaust valve 6 and the gas supply component are closed, and the internal pressure of the high-pressure tank body 1 reaches 2-5MPa. The heating component is started to generate an arc, and the temperature of the magnesium metal powder is heated to more than 200°C in the hydrogen environment, so that part of the hydrogen reacts with the magnesium metal powder in the high temperature and high pressure environment to form magnesium hydride powder. Finally, the heating component is controlled to stop heating and slowly cool down, and the servo motor 2 is started to drive the loading plate 3 rotates forward half a circle, moves the graphite crucible 4 to just below the baffle 5, can shield the magnesium hydride powder, and opens the exhaust valve 6 and the gas supply assembly, and introduces argon gas into the high-pressure tank body 1 again, squeezes out the hydrogen and discharges it along the exhaust valve 6, which is convenient for separating the negative pressure airflow in the exhaust valve 6 from the magnesium hydride powder and reducing the scattered magnesium hydride powder. The above-discharged waste gas is collected by the drainage method. After the pressure is released, the upper opening of the high-pressure tank body 1 is opened, and the servo motor 2 drives the loading plate 3 to reverse half a circle, and the graphite crucible 4 is moved to stagger the baffle 5, which can facilitate the removal and collection of the magnesium hydride powder.

[0024] Among them, the Chinese utility model with reference publication number CN215924397U is a nano magnesium hydride powder preparation device, which also includes a high-voltage power supply, a collection air pump, a gas control valve, an argon control valve and a hydrogen control valve, wherein the high-voltage power supply is connected to the heating component, the collection air pump is connected to the exhaust valve 6, the gas control valve is used to open and close the gas supply component, the argon control valve and the hydrogen control valve are used to open and close argon and hydrogen respectively, and a pressure gauge and an electronic thermometer are installed on the outside of the high-pressure tank 1 to realize the visualization of pressure and temperature parameters during the reaction process.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a sealing cover 7 is mounted at the opening of the high-pressure tank body 1, and a turntable is mounted on the sealing cover 7. The sealing cover 7 can be locked at the opening of the high-pressure tank body 1 by rotating the turntable forward, and the sealing cover 7 can be opened by rotating the turntable reversely.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the air supply assembly includes an air compressor 8 installed on one side of the high-pressure tank body 1. The air compressor 8 can select a DJ series fixed compressor. The air outlet of the air compressor 8 is connected to the air inlet of the high-pressure tank body 1. The air outlet of the air compressor 8 is also connected to a gas storage tank, a pre-filter, a dryer, a post-filter and a precision filter in sequence. This technical solution is a prior art and is not drawn in the figure. The air inlet of the air compressor 8 is connected to a hydrogen tank 9 and an argon tank 10. The hydrogen tank 9 and the argon tank 10 are selectively opened to pass argon or hydrogen into the high-pressure tank body 1, and the air compressor 8 is started for pressurization. The pressurization range is adjustable within 2 to 5 MPa. After the reaction, the air compressor 8 is shut down to slowly release the pressure.

[0027] like Figure 2 , Figure 3 and Figure 5 As shown, the heating component includes an insulating tube 11 fixed inside the high-pressure tank body 1, and an electrode gun 12 is axially inserted inside the insulating tube 11. The lower end of the electrode gun 12 is in an inverted concave shape and is suspended above the loading plate 3. The electrode gun 12 is forked and can face the opening of the graphite crucible 4. The upper end of the electrode gun 12 extends out of the high-pressure tank body 1 along the axial direction of the insulating tube 11. The upper end of the electrode gun 12 is also electrically connected to a high-voltage power supply. This technical solution is a prior art and is not drawn in the figure. During the reaction, the high-voltage power supply is started, and the electrode gun 12 is energized to generate an arc. The arc is used to heat the magnesium metal powder in the graphite crucible 4, which is convenient for avoiding the high-pressure tank body 1 to concentrate the heat on the magnesium metal powder, and the insulating tube 11 is used to separate the high-pressure tank body 1 and the electrode gun 12 to prevent conduction. The portion of the electrode gun 12 exposed outside the high-pressure tank body 1 is also wrapped with an insulating layer to prevent accidental electric shock.

[0028] like Figure 3 and Figure 4 As shown, two grooves 13 are symmetrically provided on the upper surface of the loading plate 3, wherein the opening of one of the grooves 13 covers the graphite crucible 4, and the grooves 13 are used to limit the graphite crucible 4, so that the graphite crucible 4 can be placed stably and horizontally, and will not deviate even if the servo motor 2 rotates half a circle.

[0029] like Figure 3 and Figure 4 As shown, a heat insulating layer 14 is fixed in the middle of the lower surface of the loading tray 3. The heat insulating layer 14 can be made of rock wool material, which has strong supporting strength while being heat-insulating. The side of the heat insulating layer 14 away from the loading tray 3 is fixedly connected to the output end of the servo motor 2. The heat insulating layer 14 is utilized to separate the loading tray 3 from the servo motor 2, thereby reducing the heat transferred from the loading tray 3 to the servo motor 2, preventing the servo motor 2 from being heated and causing temperature abnormalities, and facilitating the protection of the servo motor 2.

[0030] The working principle of the utility model is as follows: when storing hydrogen, a quantitative amount of magnesium metal powder is contained in a graphite crucible 4 and flattened. After flattening, the relatively shallow magnesium metal powder can increase the contact area with hydrogen. Then, the graphite crucible 4 is placed into a high-pressure tank body 1 from the upper opening, and is seated on a loading tray 3 facing the heating component, and the upper opening of the high-pressure tank body 1 is closed.

[0031] Secondly, open the exhaust valve 6, start the gas supply component to first introduce excess argon to squeeze out the air in the high-pressure tank 1, and then introduce a certain amount of hydrogen to exhaust the argon. At this time, close the exhaust valve 6 and the gas supply component, and the internal pressure of the high-pressure tank 1 reaches 2-5MPa. Start the heating component to generate an arc, and heat the magnesium metal powder to a temperature of >200°C in a hydrogen environment, so that part of the hydrogen reacts with the magnesium metal powder in a high temperature and high pressure environment to form magnesium hydride powder.

[0032] Finally, the heating component is controlled to stop heating and cool down slowly, the servo motor 2 is started to drive the loading plate 3 to rotate half a circle forward, the graphite crucible 4 is moved to just below the baffle 5 to shield the magnesium hydride powder, and the exhaust valve 6 and the gas supply component are opened, and argon is introduced into the high-pressure tank body 1 again to squeeze out the hydrogen and discharge it along the exhaust valve 6, so as to separate the negative pressure airflow in the exhaust valve 6 from the magnesium hydride powder and reduce the scattered magnesium hydride powder. The above-discharged waste gas is collected by the drainage method.

[0033] After the pressure is released, the opening on the high-pressure tank body 1 is opened, and the servo motor 2 drives the loading plate 3 to reverse half a circle, and the graphite crucible 4 is moved to stagger the baffle 5, so that the magnesium hydride powder can be easily taken out and collected.

[0034] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A high-pressure hydrogen storage container, comprising a high-pressure tank body (1), characterized in that: The upper surface of the high-pressure tank body (1) is an open structure, a heating component is arranged inside the high-pressure tank body (1), a servo motor (2) is fixed on the lower surface of the high-pressure tank body (1), an output end of the servo motor (2) extends into the interior of the high-pressure tank body (1) and a loading tray (3) is fixed to the output end, a graphite crucible (4) is inserted on the upper surface of the loading tray (3), a baffle (5) is fixed inside the high-pressure tank body (1), the lower surface of the baffle (5) is parallel to the upper surface of the graphite crucible (4), an exhaust valve (6) is connected and fixed to one side of the high-pressure tank body (1), and a gas supply component is installed on the other side of the high-pressure tank body (1).

2. A high-pressure hydrogen storage container according to claim 1, characterized in that: The opening of the high-pressure tank body (1) is equipped with a sealing cover (7).

3. A high-pressure hydrogen storage container according to claim 1, characterized in that: The gas supply assembly comprises an air compressor (8) installed on one side of the high-pressure tank body (1); the air outlet of the air compressor (8) is connected to the air inlet of the high-pressure tank body (1); and the air inlet of the air compressor (8) is connected to a hydrogen tank (9) and an argon tank (10).

4. A high-pressure hydrogen storage container according to claim 1, characterized in that: The heating assembly comprises an insulating tube (11) fixed inside the high-pressure tank body (1), an electrode gun (12) is axially inserted inside the insulating tube (11), the lower end of the electrode gun (12) is in an inverted concave shape and is suspended above the loading plate (3), and the upper end of the electrode gun (12) extends out of the high-pressure tank body (1) along the axial direction of the insulating tube (11).

5. A high-pressure hydrogen storage container according to claim 1, characterized in that: The upper surface of the material loading plate (3) is also symmetrically provided with two grooves (13), wherein the opening of one of the grooves (13) covers the graphite crucible (4).

6. A high-pressure hydrogen storage container according to claim 1, characterized in that: A heat insulating layer (14) is fixed in the middle of the lower surface of the material loading tray (3), and a side of the heat insulating layer (14) away from the material loading tray (3) is fixedly connected to the output end of the servo motor (2).

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