Low-temperature high-pressure hydrogen storage filling equipment

Abstract

The utility model discloses low-temperature and high-pressure hydrogen storage and filling equipment, and relates to the technical field of hydrogen storage and filling equipment. The device comprises a storage tank, a sealing assembly and a leakage active detection assembly, the top of the storage tank is communicated with a conveying pipe, a control valve is installed on the surface of the conveying pipe, and the sealing assembly comprises a metal hose. Through the sealing assembly, the metal hose is connected with the conveying pipe, the top of the conveying pipe is covered with the sealing cover to form a first sealing barrier, an electric cylinder in the secondary sealing mechanism drives a bracket to move upwards, and an extrusion ring is forced to apply radial pressure to the slope surface of a conical sealing rubber ring; and the screw rods on the two sides of the fixing plate are matched to be screwed into the fixing sleeve to achieve mechanical locking, the synergistic effect of multiple layers of sealing structures is achieved, the sealing reliability of the connecting part under the extremely low-temperature and high-pressure environment is remarkably improved, and hydrogen leakage caused by material shrinkage difference is prevented.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydrogen storage and refueling equipment, and in particular relates to a low-temperature, high-pressure hydrogen storage and refueling equipment. Background Technology

[0002] Low-temperature high-pressure hydrogen storage and refueling equipment is a specialized device used to store, pressurize, and refuel liquid or high-pressure gaseous hydrogen. It maintains the liquid storage of hydrogen through low-temperature insulation technology and is equipped with a high-pressure compression system to achieve rapid hydrogen refueling. It is a key piece of equipment in the hydrogen energy industry chain that connects storage and transportation with end-use applications.

[0003] In existing cryogenic high-pressure hydrogen storage and refueling equipment, the components connecting the hydrogen storage container, delivery pipeline, and refueling interface are usually connected by flanges or threads, and rely on seals to achieve sealing. However, under the harsh conditions of extremely low temperature and extremely high working pressure, the connection points are prone to sealing failure due to factors such as material shrinkage differences, seal performance degradation, and structural stress concentration, leading to hydrogen leakage. This not only causes energy waste and safety hazards, but also seriously restricts the reliability and service life of the equipment, making it unsuitable for use.

[0004] To address these issues, we provide a cryogenic high-pressure hydrogen storage and refueling device. Utility Model Content

[0005] The purpose of this invention is to provide a low-temperature, high-pressure hydrogen storage and refueling device. By combining a sealing component and an active leakage detection component, it solves the problem of hydrogen leakage caused by the shrinkage difference of the sealing material due to low temperature and high pressure during the hydrogen refueling process in existing low-temperature, high-pressure hydrogen storage and refueling devices.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a low-temperature, high-pressure hydrogen storage and refueling device, comprising a storage tank, a sealing assembly, and an active leak detection assembly. The top of the storage tank is connected to a delivery pipe, and a control valve is installed on the surface of the delivery pipe. The sealing assembly includes a metal flexible hose, with a sealing cover fixedly connected to the surface of the metal flexible hose. A secondary sealing mechanism is fixedly connected to the rear side of the sealing cover. A sealing ring is fixedly connected to the top of the inner cavity of the sealing cover. A fixing plate is fixedly connected to the surface of the sealing cover. Screws are provided on both sides of the top of the fixing plate. The bottom of the screws penetrates the fixing plate and is threadedly connected to a fixing sleeve. The bottom of the fixing sleeve is fixedly connected to the storage tank. The active leak detection assembly includes a detection tube, with its rear side fixedly connected to the metal flexible hose. A fan is connected to the front side of the detection tube. A cover plate is provided on the top of the detection tube, and a hydrogen concentration detection sensor is fixedly connected to the bottom of the cover plate.

[0008] The present invention is further configured such that the secondary sealing mechanism includes an electric cylinder, the front side of which is fixedly connected to the sealing cover, a bracket is fixedly connected to the bottom of the output end of the electric cylinder, a compression ring is fixedly connected to the top of the bracket, and a conical sealing ring is fixedly connected to the inner wall of the sealing cover. The electric cylinder can control the height of the bracket, and when the bracket moves, it controls the compression ring to compress the slope of the conical sealing ring upward, so that the conical sealing ring fits tightly against the surface of the delivery pipe, thereby improving the sealing performance during the hydrogen refueling process.

[0009] The present invention is further configured such that a limiting ring is fixedly connected to the surface of the conveying pipe, a knob is fixedly connected to the top of the screw, the surface of the screw and the fixed sleeve are movably connected by a bearing, the limiting ring can limit the conical sealing ring, the knob makes it easy for the user to rotate the screw, and the bearing is used to improve the stability of the screw during rotation.

[0010] The present invention is further configured such that handles are fixedly connected to both sides of the sealing cover, and a suction hood is connected to the bottom of the detection tube. The handles facilitate the user to lift the sealing cover and transfer it to the top of the delivery tube, and the suction hood facilitates the entry of external air into the detection tube.

[0011] The present invention is further configured such that a filter screen is fixedly connected between the two sides of the inner cavity of the detection tube, and a handle is fixedly connected to the top of the cover plate. The filter screen is used to filter dust in the air to prevent dust in the air from affecting the detection sensitivity of the hydrogen concentration detection sensor, and the handle makes it easy for the user to open the cover plate.

[0012] The present invention is further configured such that the bottom of the cover plate surface is interference-fitted with the inner wall of the detection tube, the rear side of the detection tube is fixedly connected to the metal hose through a connecting bracket, and the bottom of the cover plate is interference-fitted with the inner wall of the detection tube, so that the cover plate can be quickly installed and disassembled. The connecting bracket is used to increase the stability of the connection between the detection tube and the metal hose.

[0013] The present invention is further configured such that a protective frame is fixedly connected to the surface of the storage tank, a discharge pipe is connected to the right side of the storage tank, a valve is installed on the surface of the discharge pipe, the protective frame can protect the storage tank from damage caused by impact, the discharge pipe can discharge hydrogen gas, and the valve is used to control the opening and closing of the discharge pipe.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model uses a sealing assembly to connect a metal hose and a delivery pipe. A sealing cover covers the top of the delivery pipe to form a first sealing barrier. In the secondary sealing mechanism, an electric cylinder drives the bracket to move upward, forcing the extrusion ring to apply radial pressure to the slope of the conical sealing ring, making it tightly fit the surface of the delivery pipe to form an adaptive seal. The screws on both sides of the fixing plate are screwed into the fixing sleeve to achieve mechanical locking. The multi-layer sealing structure works together to significantly improve the sealing reliability of the connection parts under extremely low temperature and high pressure environments and prevent hydrogen leakage caused by material shrinkage differences.

[0016] 2. This utility model uses an active leak detection component to continuously collect the gas around the sealing cover using the suction hood at the bottom of the detection tube. The exhaust fan actively draws the gas into the detection tube. After the filter screen filters out dust, the hydrogen concentration detection sensor analyzes the gas composition in real time. When an abnormal hydrogen concentration is detected, the control valve is immediately triggered to close the delivery pipe, realizing early warning and automatic cut-off of hydrogen leaks and eliminating safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 A perspective view of a low-temperature, high-pressure hydrogen storage and refueling device;

[0019] Figure 2 Rear view of a sealing assembly in a cryogenic high-pressure hydrogen storage and refueling device;

[0020] Figure 3 This is a cross-sectional view of a sealing cover in a cryogenic high-pressure hydrogen storage and refueling device;

[0021] Figure 4 An exploded view of a sealing component in a low-temperature, high-pressure hydrogen storage and refueling device;

[0022] Figure 5 This is a cross-sectional view of the detection tube in a low-temperature, high-pressure hydrogen storage and refueling device.

[0023] In the attached diagram: 1. Storage tank; 2. Delivery pipe; 3. Control valve; 4. Sealing assembly; 41. Metal hose; 42. Sealing cover; 43. Secondary sealing mechanism; 44. Sealing ring; 45. Fixing plate; 46. Screw; 47. Fixing sleeve; 5. Active leakage detection assembly; 51. Detection tube; 52. Exhaust fan; 53. Cover plate; 54. Hydrogen concentration detection sensor; 431. Electric cylinder; 432. Bracket; 433. Compression ring; 434. Conical sealing ring; 6. Filter screen; 7. Protective frame. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] Please see Figure 1-5 This utility model is a low-temperature high-pressure hydrogen storage and refueling device, including a storage tank 1, a sealing assembly 4, and an active leakage detection assembly 5. The top of the storage tank 1 is connected to a delivery pipe 2, and a control valve 3 is installed on the surface of the delivery pipe 2. The sealing assembly 4 includes a metal hose 41, a sealing cover 42 is fixedly connected to the surface of the metal hose 41, a secondary sealing mechanism 43 is fixedly connected to the rear side of the sealing cover 42, a sealing ring 44 is fixedly connected to the top of the inner cavity of the sealing cover 42, a fixing plate 45 is fixedly connected to the surface of the sealing cover 42, screws 46 are provided on both sides of the top of the fixing plate 45, the bottom of the screws 46 penetrates the fixing plate 45 and is threadedly connected to a fixing sleeve 47, and the bottom of the fixing sleeve 47 is fixedly connected to the storage tank 1. The active leakage detection assembly 5 includes a detection tube 51, the rear side of the detection tube 51 is fixedly connected to the metal hose 41, a fan 52 is connected to the front side of the detection tube 51, a cover plate 53 is provided on the top of the detection tube 51, and a hydrogen concentration detection sensor 54 is fixedly connected to the bottom of the cover plate 53.

[0027] Specifically: Storage tank 1 is used for hydrogen storage. Delivery pipe 2 and control valve 3 facilitate the delivery of hydrogen into storage tank 1. Metal hose 41 can fill hydrogen into storage tank 1. Sealing cover 42 can seal the top of delivery pipe 2. Secondary sealing mechanism 43 can increase the sealing effect of sealing cover 42 on delivery pipe 2. Screw 46 can cooperate with fixed sleeve 47 to control fixed plate 45 and sealing cover 42 to move downward, so that the top of delivery pipe 2 is tightly fitted with sealing ring 44, ensuring the sealing of the connection between metal hose 41 and delivery pipe 2, and preventing leakage during hydrogen filling. Detection pipe 51 facilitates the fixing of exhaust fan 52. Exhaust fan 52 can deliver outside air into detection pipe 51. Hydrogen concentration detection sensor 54 is used to detect the hydrogen concentration in the air. When hydrogen leakage is detected, the control valve 3 can immediately control the delivery pipe 2 to close, avoiding a large leakage of hydrogen and increasing the danger.

[0028] Example 2

[0029] Please see Figure 1-5Based on Embodiment 1, the secondary sealing mechanism 43 includes an electric cylinder 431. The front side of the electric cylinder 431 is fixedly connected to the sealing cover 42. A bracket 432 is fixedly connected to the bottom of the output end of the electric cylinder 431. A compression ring 433 is fixedly connected to the top of the bracket 432. A conical sealing ring 434 is fixedly connected to the inner wall of the sealing cover 42. A limit ring is fixedly connected to the surface of the conveying pipe 2. A knob is fixedly connected to the top of the screw 46. The surface of the screw 46 is movably connected to the fixing sleeve 47 through a bearing. Handles are fixedly connected to both sides of the sealing cover 42. A suction hood is connected to the bottom of the detection pipe 51. A filter screen 6 is fixedly connected between the two sides of the inner cavity of the detection pipe 51. A handle is fixedly connected to the top of the cover plate 53. The bottom of the surface of the cover plate 53 is interference-fitted to the inner wall of the detection pipe 51. The rear side of the detection pipe 51 is fixedly connected to the metal hose 41 through a connecting frame. A protective frame 7 is fixedly connected to the surface of the storage tank 1. A discharge pipe is connected to the right side of the storage tank 1. A valve is installed on the surface of the discharge pipe.

[0030] Specifically: the electric cylinder 431 controls the height of the bracket 432. When the bracket 432 moves, it controls the compression ring 433 to compress the slope of the conical sealing ring 434 upwards, ensuring a tight fit between the conical sealing ring 434 and the surface of the delivery pipe 2, thus improving the sealing performance during hydrogen refueling. The limiting ring limits the position of the conical sealing ring 434. The knob facilitates the user's rotation of the screw 46. The bearing improves the stability of the screw 46 during rotation. The handle allows the user to lift the sealing cover 42 and transfer it to the top of the delivery pipe 2. The suction hood facilitates external... Air enters the detection tube 51. The filter 6 is used to filter dust in the air to prevent dust from affecting the detection sensitivity of the hydrogen concentration detection sensor 54. The handle makes it easy for the user to open the cover 53. The bottom of the cover 53 is interference-fitted with the inner wall of the detection tube 51, so that the cover 53 can be quickly installed and removed. The connecting bracket is used to increase the stability of the connection between the detection tube 51 and the metal hose 41. The protective frame 7 can protect the storage tank 1 from damage caused by impact. The discharge pipe can discharge hydrogen. The valve is used to control the opening and closing of the discharge pipe.

[0031] The working principle of this utility model is as follows: First, the sealing cover 42 is fitted onto the top of the conveying pipe 2 using the handle. At this time, the bottom of the metal hose 41 extends into the interior of the conveying pipe 2. Then, the knob on the top of the screw 46 is manually rotated, causing the screw 46 to rotate and press down inside the fixing sleeve 47, which drives the fixing plate 45 and the sealing cover 42 to move down until the sealing ring 44 is tightly attached to the top of the conveying pipe 2 to complete the initial seal. Then, the electric cylinder 431 is activated, which pushes the bracket 432 upward. The bracket 432 drives the extrusion ring 433 to press against the inclined inner wall of the conical sealing ring 434. This forces the inner wall of the conical sealing ring 434 to fit tightly against the surface of the delivery pipe 2, forming a secondary dynamic seal. When adding hydrogen, the control valve 3 is opened, and the hydrogen flows into the delivery pipe 2 through the metal hose 41 and then into the storage tank 1. At the same time, the exhaust fan 52 continuously extracts the gas around the sealing cover 42. The gas enters the detection pipe 51 through the suction hood. After the filter screen 6 intercepts impurities, the hydrogen concentration detection sensor 54 monitors the gas composition in real time. If the hydrogen concentration is detected to be excessive, the control valve 3 is immediately closed to stop the addition, realizing early warning and automatic cut-off of hydrogen leakage and eliminating safety hazards.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A cryogenic high-pressure hydrogen storage and refueling device, comprising a storage tank (1), a sealing assembly (4), and a leak detection assembly (5), characterized in that: The top of the storage tank (1) is connected to a conveying pipe (2), and a control valve (3) is installed on the surface of the conveying pipe (2); The sealing assembly (4) includes a metal hose (41), a sealing cover (42) is fixedly connected to the surface of the metal hose (41), a secondary sealing mechanism (43) is fixedly connected to the rear side of the sealing cover (42), a sealing ring (44) is fixedly connected to the top of the inner cavity of the sealing cover (42), a fixing plate (45) is fixedly connected to the surface of the sealing cover (42), and screws (46) are provided on both sides of the top of the fixing plate (45). The bottom of the screws (46) passes through the fixing plate (45) and is threadedly connected to a fixing sleeve (47). The bottom of the fixing sleeve (47) is fixedly connected to the storage tank (1). The active leak detection component (5) includes a detection tube (51), the rear side of which is fixedly connected to a metal hose (41), the front side of which is connected to an exhaust fan (52), the top of which is provided with a cover plate (53), and the bottom of which is fixedly connected to a hydrogen concentration detection sensor (54).

2. The cryogenic high-pressure hydrogen storage and refueling equipment according to claim 1, characterized in that: The secondary sealing mechanism (43) includes an electric cylinder (431), the front side of which is fixedly connected to the sealing cover (42), a bracket (432) is fixedly connected to the bottom of the output end of the electric cylinder (431), a compression ring (433) is fixedly connected to the top of the bracket (432), and a conical sealing ring (434) is fixedly connected to the inner wall of the sealing cover (42).

3. The cryogenic high-pressure hydrogen storage and refueling equipment according to claim 1, characterized in that: The surface of the conveying pipe (2) is fixedly connected with a limiting ring, the top of the screw (46) is fixedly connected with a knob, and the surface of the screw (46) is movably connected to the fixing sleeve (47) through a bearing.

4. The cryogenic high-pressure hydrogen storage and refueling equipment according to claim 1, characterized in that: Both sides of the sealing cover (42) are fixedly connected to handles, and the bottom of the detection tube (51) is connected to a suction hood.

5. The cryogenic high-pressure hydrogen storage and refueling equipment according to claim 1, characterized in that: A filter screen (6) is fixedly connected between the two sides of the inner cavity of the detection tube (51), and a handle is fixedly connected to the top of the cover plate (53).

6. The cryogenic high-pressure hydrogen storage and refueling equipment according to claim 1, characterized in that: The bottom of the cover plate (53) is press-fitted to the inner wall of the detection tube (51), and the rear side of the detection tube (51) is fixedly connected to the metal hose (41) by a connecting bracket.

7. The cryogenic high-pressure hydrogen storage and refueling equipment according to claim 1, characterized in that: A protective frame (7) is fixedly connected to the surface of the storage tank (1), and a discharge pipe is connected to the right side of the storage tank (1), with a valve installed on the surface of the discharge pipe.

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