Liquid hydrogen leakage sealing detection device for hydrogen refueling station

Abstract

The utility model relates to the technical field of hydrogen refueling station hydrogen leakage detection, in particular to a hydrogen refueling station liquid hydrogen leakage sealing detection device which comprises a detection mechanism, the detection mechanism is arranged on a connecting pipe at an opening of a hydrogen storage tank and comprises a detection pipe arranged on the connecting pipe, and a detection warning assembly is arranged in the detection pipe. A mounting assembly is arranged at the lower end of the detection pipe and is detachably connected with the connecting pipe; through the detection warning assembly, leakage is detected, warning is provided and possible loss or danger is reduced only through matched use of a pressure sensor and a piston plate, and the detection warning assembly can be conveniently and rapidly mounted and dismounted through the mounting assembly, so that inspection and maintenance are facilitated, and long-term stable operation is guaranteed; the hydrogen leakage detection device solves the problem that an existing hydrogen leakage device depends on complex electronic sensors and circuit design for detection, so that maintenance requirements and cost are increased due to the fact that electronic components are prone to faults.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen leakage detection in hydrogen filling stations, and in particular relates to a liquid hydrogen leakage sealing detection device in hydrogen filling stations. Background Art

[0002] Hydrogen (H2) is the lightest gas known in the world. Its density is very small, only 1 / 14 of air, that is, at standard atmospheric pressure of 0°C, the density of hydrogen is 0.0899g / L. Liquid hydrogen must be stored in super-insulated tanks, which have efficient thermal insulation properties and can minimize the impact of external temperature on liquid hydrogen. When using a hydrogen refueling station, it is necessary to pump liquid hydrogen from the tank and transport it to the hydrogen refueling interface to refill the vehicle with hydrogen.

[0003] Since liquid hydrogen is highly flammable and has a high risk of explosion, a strict safety control system must be installed during the transportation process to ensure the safety of its use. Among them, hydrogen leakage detection, as one of the main control items of the safety control system, plays a vital role in the transportation safety of hydrogen. After searching, patent number CN220269136U discloses a hydrogen leakage detection device for a hydrogen filling station, which is shown by the setting of a connecting box, a first hydrogen sensor and a first connecting line, as well as a fixed block, a sealing tube, a second hydrogen sensor and a second connecting line. The hydrogen leaked at the connection of the hydrogen tank can be directed to the connecting box, thereby realizing the leakage detection of hydrogen in the hydrogen filling station and avoiding the use of a hydrogen concentration sensor. The device has the advantages of long service life, high accuracy and high stability, but when the device is in use:

[0004] 1. If the detection system relies on complex electronic sensors and circuit designs, the increased complexity of the electronic sensors and circuits means that more components may fail or degrade in performance. Each component may become a potential point of system failure, reducing the overall stability and durability of the system.

[0005] 2. Since the detection system relies on complex electronic sensors and circuit designs, when the equipment fails, its inspection and maintenance work will become particularly difficult, affecting the normal operation efficiency of the hydrogen refueling station.

[0006] Therefore, the utility model designs a liquid hydrogen leakage and sealing detection device for a hydrogen filling station to solve the problems existing in the above-mentioned background technology. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the utility model provides a liquid hydrogen leakage and sealing detection device for a hydrogen refueling station, which has the advantages of quickly issuing a warning signal to provide a reminder when a hydrogen leakage is detected, avoiding complex sensor networks and electronic circuits, reducing maintenance costs and failure rates, etc. It solves the problem that the existing liquid hydrogen leakage and sealing detection devices for hydrogen refueling stations rely on complex electronic sensors and circuit designs for detection, which increases the demand and cost for maintenance due to the prone failure of electronic components, resulting in reduced stability in the use of the equipment.

[0009] (II) Technical solution

[0010] In order to achieve the purpose of quickly issuing a warning signal when hydrogen leakage is detected, giving a reminder, avoiding complex sensor networks and electronic circuits, and reducing maintenance costs and failure rates, the utility model provides the following technical solutions:

[0011] A liquid hydrogen leakage and sealing detection device for a hydrogen filling station includes a detection mechanism, which is arranged on a connecting pipe at the opening of a hydrogen storage tank, including a detection tube arranged on the connecting pipe, a detection warning component is arranged in the detection tube, and an installation component is arranged at the lower end of the detection tube, and the installation component is detachably connected to the connecting pipe.

[0012] Based on the above technical features: through the detection and warning component, a warning can be provided when a leak is detected, thereby providing an immediate warning to the operator, speeding up the response, and reducing possible losses or dangers; the detection and warning component can be installed through the installation component to facilitate rapid installation and disassembly, thereby facilitating inspection and maintenance, and ensuring long-term stable operation.

[0013] As a preferred solution of the liquid hydrogen leakage sealing detection device for a hydrogen filling station described in the utility model: the detection warning component includes a fixed plate fixedly installed on one side of the detection tube, a screw is installed through one side of the fixed plate, and the screw is threadedly connected to the fixed plate, one end of the screw located inside the detection tube is rotatably connected to a driving plate, the surface of the driving plate is slidably connected to two support rods, one end of the two support rods is fixedly connected to a piston plate, a pressure sensor is fixedly installed on the bottom of the driving plate, and the pressure sensor is located between the piston plate and the driving plate.

[0014] Based on the above technical features: the detection warning component is quickly installed on the connecting pipe by installing the component, and then the screw is rotated to make the screw drive the driving plate to move, so that the driving plate can synchronously drive the piston plate to move, so that the inside of the connecting pipe is in a negative pressure state. If hydrogen leaks, the piston plate will be lifted up and contacted with the pressure sensor, and a warning signal can be issued to remind, avoiding complex sensor networks and electronic circuits, reducing maintenance costs and failure rates.

[0015] As a preferred solution of the liquid hydrogen leakage sealing detection device for a hydrogen filling station described in the utility model: the detection warning component also includes a spring sleeved on the outside of the two support rods, and the two ends of the spring are respectively fixedly connected to the fixed plate and the piston plate.

[0016] Based on the above technical features: when the inside of the connecting pipe is not in a negative pressure state, the piston plate can be pulled by the spring to move the piston plate upward to trigger the pressure sensor, so that the piston plate can detect hydrogen leakage more sensitively.

[0017] As a preferred solution of the liquid hydrogen leakage sealing detection device for a hydrogen filling station described in the utility model: a knob is fixedly connected to the top end of the screw rod, and a plurality of grooves are formed on the surface of the knob.

[0018] Based on the above technical features: the control screw can be rotated more conveniently using a knob, and the multiple grooves opened on the knob surface can increase the friction force of the contact knob, making the driving knob more stable.

[0019] As a preferred solution of the liquid hydrogen leakage sealing detection device for a hydrogen refueling station described in the utility model: the installation assembly includes a mounting plate fixedly installed at the bottom of the detection tube, a threaded ring is fixedly installed at the bottom of the mounting plate, and a threaded groove is opened on the inner wall of the connecting tube, and the threaded groove is threadedly connected to the threaded ring.

[0020] Based on the above technical features: when the detection warning component needs to be maintained, the mounting plate can be rotated to quickly separate the mounting plate from the connecting tube, and the detection tube can be quickly disassembled, thereby facilitating the maintenance of the detection warning component inside the detection tube and ensuring its long-term stable operation.

[0021] As a preferred solution of the liquid hydrogen leakage sealing detection device for a hydrogen filling station described in the utility model: the installation assembly also includes a sealing ring fixedly installed at the bottom of the threaded ring, and the sealing ring is slidably connected to the inner wall of the connecting pipe.

[0022] Based on the above technical features: the sealing ring at the bottom of the threaded ring can be used to increase the sealing of the connection when the threaded ring and the connecting pipe are threadedly connected, so that the sealing inside the connecting pipe is increased.

[0023] As a preferred solution of the liquid hydrogen leakage sealing detection device for a hydrogen filling station described in the utility model: an alarm is fixedly installed on the surface of the detection tube, and the pressure sensor is connected to the alarm through a controller.

[0024] Based on the above technical features: the pressure sensor is used in conjunction with the controller and the alarm. When the pressure sensor is triggered, the alarm can be controlled by the controller to send out an alarm signal, so that maintenance personnel can quickly receive the alarm and perform maintenance.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the utility model provides a liquid hydrogen leakage seal detection device for a hydrogen filling station, including a detection mechanism, which is arranged on a connecting pipe at the opening of a hydrogen storage tank, including a detection tube arranged on the connecting pipe, a detection warning component is arranged in the detection tube, and a mounting component is arranged at the lower end of the detection tube, and the mounting component is detachably connected to the connecting pipe, which has the following beneficial effects:

[0027] 1. Through the detection and warning components, an alarm can be provided when a leak is detected, so as to provide an immediate warning to the operator, speed up the response, and reduce possible losses or dangers. The detection and warning components can be quickly installed and disassembled through the installation components, so as to facilitate inspection and maintenance and ensure long-term stable operation;

[0028] 2. When the detection warning component needs to be maintained, the mounting plate can be rotated to quickly separate the mounting plate from the connecting tube, and the detection tube can be quickly disassembled, thereby facilitating the maintenance of the detection warning component inside the detection tube and ensuring its long-term stable operation; it can quickly send out a warning signal when a hydrogen leak is detected, and avoid complex sensor networks and electronic circuits, thereby reducing maintenance costs and failure rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the liquid hydrogen leakage and sealing detection device for a hydrogen filling station according to the utility model;

[0030] Figure 2 This is a schematic diagram of the structure inside the detection tube of the utility model;

[0031] Figure 3 It is a structural schematic diagram of the detection mechanism of the utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the detection and warning component of the utility model;

[0033] Figure 5 It is a structural schematic diagram of the installation assembly of the utility model.

[0034] In the figure: 1. Hydrogen storage tank; 2. Connecting pipe; 3. Detection mechanism; 31. Detection tube; 32. Detection warning assembly; 321. Fixed plate; 322. Screw; 323. Drive plate; 324. Support rod; 325. Spring; 326. Piston plate; 327. Pressure sensor; 328. Knob; 33. Mounting assembly; 331. Mounting plate; 332. Threaded ring; 333. Threaded groove; 334. Sealing ring; 34. Warning device; 35. Controller. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Example 1: Please refer to the figure Figure 1-5 As shown, a liquid hydrogen leakage and sealing detection device for a hydrogen filling station comprises:

[0037] A detection mechanism 3 is provided on the connecting pipe 2 at the opening of the hydrogen storage tank 1, and is used for sealing leakage detection of the hydrogen in the hydrogen storage tank 1, and includes a detection tube 31 fixedly installed on one side of the connecting pipe 2, and a detection warning component 32 is provided on one side of the detection tube 31, and a mounting component 33 is provided on one side of the detection warning component 32. Through the detection warning component 32, a warning can be provided when a leak is detected, thereby realizing an immediate warning to the operator, accelerating the response speed, and reducing possible losses or dangers. When in use, the detection warning component 32 can be quickly installed and disassembled through the mounting component 33, thereby facilitating inspection and maintenance, and ensuring the long-term and stable operation of the device.

[0038] As a preferred embodiment, Figure 2 and Figure 3As shown, the detection warning component 32 includes a fixing plate 321 fixedly installed on one side of the detection tube 31, a screw 322 is installed through one side of the fixing plate 321, and the screw 322 is threadedly connected to the fixing plate 321, and one end of the screw 322 located inside the detection tube 31 is rotatably connected to a driving plate 323, and the surface of the driving plate 323 is slidably connected to two support rods 324, one end of the two support rods 324 is fixedly connected to a piston plate 326, and a pressure sensor 327 is fixedly installed on the bottom of the driving plate 323, and the pressure sensor 327 is located between the piston plate 326 and the driving plate 323. The detection warning component 32 is quickly installed on the connecting tube 2 through the installation component 33, and then the screw 322 is rotated to make the screw 322 drive the driving plate 323 to move , the driving plate 323 can synchronously drive the piston plate 326 to move, so that the interior of the connecting pipe 2 is in a negative pressure state. If hydrogen leaks, the piston plate 326 will be lifted up and contacted with the pressure sensor 327, and a warning signal can be issued to remind, avoiding complex sensor networks and electronic circuits, reducing maintenance costs and failure rates; the detection warning component 32 also includes a spring 325 sleeved on the outside of the two support rods 324, and the two ends of the spring 325 are respectively fixedly connected to the fixed plate 321 and the piston plate 326. The spring 325 can pull the piston plate 326 to move when the interior of the connecting pipe 2 is not in a negative pressure state, so that the piston plate 326 moves up to trigger the pressure sensor 327, so that the piston plate 326 can detect hydrogen leakage more sensitively.

[0039] As a preferred embodiment, a knob 328 is fixedly connected to the top of the screw 322, and a plurality of grooves are provided on the surface of the knob 328, so that the knob 328 can be used to more conveniently control the rotation of the screw 322. The plurality of grooves provided on the surface of the knob 328 can increase the friction force of the contact knob 328, so that the driving knob 328 is more stable; an alarm 34 is fixedly installed on the surface of the detection tube 31, and a controller 35 is fixedly installed on the surface of the pressure sensor 327 (the principle is the same as that of the buzzer alarm, which is prior art and will not be elaborated in this article). The pressure sensor 327 is used in conjunction with the controller 35 and the alarm 34. When the pressure sensor 327 is triggered, the alarm 34 can be controlled by the controller 35 to send out a warning signal, so that the maintenance personnel can quickly receive the warning and carry out maintenance.

[0040] Example 2: Figure 2 and Figure 4As shown, the mounting assembly 33 described in the present embodiment includes a mounting plate 331 fixedly mounted on the bottom of the detection tube 31, a threaded ring 332 is fixedly arranged on the bottom of the mounting plate 331, a threaded groove 333 is provided on the inner wall of the connecting tube 2, and the threaded groove 333 is threadedly connected to the threaded ring 332. When the detection warning assembly 32 needs to be maintained, the mounting plate 331 can be rotated to quickly separate the mounting plate 331 from the connecting tube 2, so that the detection tube 31 can be quickly disassembled, thereby facilitating the maintenance of the detection warning assembly 32 inside the detection tube 31 and ensuring its long-term stable operation. The mounting assembly 33 also includes a sealing ring 334 fixedly mounted on the bottom of the threaded ring 332, and the sealing ring 334 is slidably connected to the inner wall of the connecting tube 2. The sealing ring 334 at the bottom of the threaded ring 332 can increase the sealing of the connection when the threaded ring 332 is threadedly connected to the connecting tube 2, thereby increasing the sealing inside the connecting tube 2.

[0041] When the utility model liquid hydrogen leakage sealing detection device of hydrogen filling station is in use: by rotating the screw rod 322 to make the screw rod 322 drive the driving plate 323 to move, the driving plate 323 can synchronously drive the piston plate 326 to move, so that the inside of the connecting pipe 2 is in a negative pressure state. If hydrogen leaks, the piston plate 326 will be lifted up and contact with the pressure sensor 327, and a warning signal can be issued to remind, avoiding complex sensor networks and electronic circuits, reducing maintenance costs and failure rates, and the spring 325 can be used to pull the piston plate 326 when the inside of the connecting pipe 2 is not in a negative pressure state, so that the piston plate 326 moves up to trigger the pressure sensor 327. The force sensor 327 enables the piston plate 326 to detect hydrogen leakage more sensitively. The pressure sensor 327 is used in conjunction with the controller 35 and the alarm 34. When the pressure sensor 327 is triggered, the alarm 34 can be controlled by the controller 35 to send out an alarm signal, so that the maintenance personnel can quickly receive the alarm and carry out maintenance. When the detection alarm component 32 needs to be maintained, the mounting plate 331 can be rotated to quickly separate the mounting plate 331 from the connecting pipe 2, so that the detection tube 31 can be quickly disassembled, thereby facilitating the maintenance of the detection alarm component 32 inside the detection tube 31 and ensuring its long-term stable operation.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid hydrogen leakage and sealing detection device for a hydrogen refueling station, characterized in that: The invention comprises a detection mechanism (3), wherein the detection mechanism (3) is arranged on a connecting pipe (2) at the opening of a hydrogen storage tank (1), and comprises a detection pipe (31) arranged on the connecting pipe (2), wherein a detection warning component (32) is arranged in the detection pipe (31), and an installation component (33) is arranged at the lower end of the detection pipe (31), and the installation component (33) is detachably connected to the connecting pipe (2).

2. A liquid hydrogen leakage and sealing detection device for a hydrogen refueling station according to claim 1, characterized in that: The detection warning component (32) comprises a fixed plate (321) arranged on the detection tube (31), a screw (322) is arranged through the fixed plate (321), and the screw (322) is threadedly connected to the fixed plate (321), and a driving plate (323) is rotatably connected to one end of the screw (322) located inside the detection tube (31), a support rod (324) is slidably arranged on the surface of the driving plate (323), one end of the support rod (324) is fixedly connected to a piston plate (326), and a pressure sensor (327) is arranged at the bottom of the driving plate (323), and the pressure sensor (327) is located between the piston plate (326) and the driving plate (323), and matches the piston plate (326).

3. A liquid hydrogen leakage and sealing detection device for a hydrogen refueling station according to claim 2, characterized in that: The detection warning component (32) further comprises a spring (325) sleeved on the outside of the support rod (324), and two ends of the spring (325) are respectively connected to the fixing plate (321) and the piston plate (326).

4. A liquid hydrogen leakage and sealing detection device for a hydrogen refueling station according to claim 2, characterized in that: A knob (328) is disposed at the top end of the screw rod (322), and a plurality of grooves are formed on the surface of the knob (328).

5. A liquid hydrogen leakage and sealing detection device for a hydrogen refueling station according to claim 1, characterized in that: The mounting assembly (33) comprises a mounting plate (331) arranged at the bottom of the detection tube (31), a threaded ring (332) being arranged at the bottom of the mounting plate (331), and the threaded ring (332) being threadedly connected to a threaded groove (333) provided on the inner wall of the connecting tube (2).

6. A liquid hydrogen leakage and sealing detection device for a hydrogen refueling station according to claim 1, characterized in that: The mounting assembly (33) further comprises a sealing ring (334) fixedly mounted on the bottom of the threaded ring (332), wherein the sealing ring (334) is slidably connected to the inner wall of the connecting pipe (2).

7. A liquid hydrogen leakage and sealing detection device for a hydrogen refueling station according to claim 2, characterized in that: The surface of the detection tube (31) is also provided with an alarm device (34), and the pressure sensor (327) is connected to the alarm device (34) via a controller (35).

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