Filling joint anti-falling protection device capable of detecting connection state and application method

Abstract

The invention provides a charging connector anti-falling protection device capable of detecting the connection state and an application method. The device comprises a connection structure, a handle, a handle base, a detection module, a control module and a battery management unit. The connecting structure is formed by oppositely connecting two sleeves and a cylindrical structure through a bolt structure, the sleeves are used for wrapping and fastening the filling connector, and the cylindrical structure wraps and fastens the hydrogen storage output pipe movable connector and the tube bundle truck filling connector during application. Each set of sleeve and cylindrical structure is provided with a handle, so that the movable joint of the hydrogen storage output pipe and the filling joint are screwed and connected, the connecting structure is locked and reinforced, and a strain detection structure of the detection module detects the rotating fastening torsion in the screwing process; and the control module generates prompt information by using a control program according to the detected signal. The device has a sleeve function to replace a wrench, does not need to disassemble an original pipeline during installation, is convenient and rapid, can automatically detect connection in place, and prevents the movable joint from being separated from a tube bundle truck filling joint.

Description

Technical Field

[0001] The present invention relates to the technical field of gas filling safety optimization, and in particular to a filling joint anti-dropping protection device capable of detecting a connection state and an application method thereof. Background Art

[0002] As one of the most promising clean energy sources, hydrogen energy occupies an important position in the energy structure. With the continuous consolidation of the foundation of hydrogen energy industrialization and the advancement of the industrialization process, the development of the automotive hydrogen energy industry has gradually entered a critical period. Since hydrogen molecules have a degrading effect on materials, the storage and transportation pressure is high, it is easy to leak and spread, and it is flammable and explosive. Safety is an important prerequisite for the development of the automotive hydrogen energy industry. According to hydrogen energy accident data, the relative proportion of the total number of accidents involving hydrogen filling links, hydrogen supply mother stations and hydrogen filling stations, is quite high. At the same time, due to the shortage of land resources and the high cost of building a station alone, existing gas stations are currently used to renovate comprehensive energy filling stations for vehicles. Hydrogen filling stations are also gradually moving into relatively densely populated areas. Based on this, it is necessary to pay more attention to the safety of the automotive hydrogen filling link.

[0003] At present, the transportation of hydrogen energy is mainly carried out by long tube trailers (tube bundle trucks) between hydrogen production plants (filling) and hydrogen filling stations (unloading). When the tube bundle truck arrives at the destination, it needs to be connected to the filling equipment (unloading equipment) at the station for gas line connection. The existing process uses quick connectors for on-site workers to tighten the connection with wrenches. In order to prevent the live joints from falling off during the filling and unloading process and swinging due to high-pressure gas spray, causing life-threatening accidents, after the live joints are connected, the on-site operators need to hang the safety rope on the nearby pipeline to prevent the hydrogen hose from falling off; currently, after the hydrogen tube bundle truck filling operation operators tighten the live joints, they mainly use soap solution to check whether there is a leak. The operation is cumbersome and unreliable, and there are many safety hazards, such as the following situations:

[0004] (1) When using soap solution for inspection, high-pressure gas is required. If the joint falls off, it will cause harm to the operator;

[0005] (2) Since the filling (discharging) time of hydrogen is generally several hours, or even more than 10 hours, there may be no gas leakage when the union is just connected, but as time goes by, hydrogen leakage may occur during the filling (discharging) process;

[0006] (3) Only when the fixed object to which the safety rope is tied is firm and the safety rope is tied at the joint, can the safety rope effectively prevent the movable joint from swinging around after it falls off. However, due to the usage habits, sense of responsibility, safety awareness and other reasons of different operators, it is common for the safety rope to not be tied or to be loosely tied on site;

[0007] (4) The tools used to tighten joints on site are not standardized. Some are open-end wrenches, some are flexible wrenches, and some are pipe clamps. As a result, different operators may tighten the joints to different degrees of tightness, and the joints may be threaded.

[0008] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a filling joint anti-dropping protection device capable of detecting the connection status, which belongs to a protection device capable of detecting in real time whether the filling joint of the hydrogen tube bundle vehicle is connected in place and having the joint anti-dropping performance. When the hydrogen tube bundle vehicle is filled, the hydrogen hose can be effectively prevented from being thrown off in the event of a hydrogen hose breakage, which can effectively ensure the safety of loading and unloading of the hydrogen tube bundle vehicle and improve the overall safety and reliability of hydrogen loading and unloading operations; in a preferred embodiment, the device comprises: a connection structure, a handle, a handle base, a detection module, a control module and a battery management unit;

[0010] The connection structure is formed by two sleeves and a cylindrical structure being relatively connected by a bolt structure, and the sleeve and the cylindrical structure are fixedly connected by a connection block, and a bolt through hole is provided on the connection block;

[0011] The sleeve is arranged at the connection end of the filling joint with the tube bundle vehicle, and is used to wrap and tighten the filling joint;

[0012] One end of the cylindrical structure is fixedly connected to the sleeve through a connecting block, and the other end is used to connect the hydrogen storage output pipe joint, and when used, wraps and tightens the hydrogen storage output pipe joint and the tube bundle vehicle charging joint;

[0013] Each set of sleeves and cylindrical structures is provided with a handle, which is used to replace a wrench to connect the flexible joint of the hydrogen storage output pipe with the filling joint of the tube bundle vehicle, and to lock and reinforce the connection structure after the connection is completed; the handle base is fixedly sleeved at the flexible joint of the hydrogen storage output pipe to provide a clamping base for the handle;

[0014] The detection module includes a detection structure and a detection circuit, wherein the detection structure includes a strain detection structure, which is arranged between the rear end connection blocks of the sleeve and is used to detect the rotational tightening torque of the movable joint during the tightening process;

[0015] The detection circuit includes a signal amplification circuit, which amplifies the rotational tightening torque signal and transmits it to the control module;

[0016] The control module is in communication connection with the detection circuit and the hydrogen delivery valve, and is used for receiving the detection signal, controlling the hydrogen delivery valve according to the detection signal based on the control program, and outputting prompt information.

[0017] In an optional embodiment, the sleeve adopts a hexagonal structure, and the handle adopts a foldable handle, one end of which is movably connected to the sleeve, so that the sleeve can be directly rotated and tightened by the handle when the hydrogen storage output pipe flexible joint is connected to the tube bundle vehicle charging joint.

[0018] Furthermore, in one embodiment, the sleeve is fixedly connected to both sides of the cylindrical structure via connecting blocks, and a plurality of bolt through holes are provided on each connecting block.

[0019] In a preferred embodiment, a strain gauge pasting hole is provided between the upper and lower connecting blocks at the rear end of the sleeve for pasting and setting the strain detection structure, and the strain detection structure adopts a strain resistance sheet.

[0020] Optionally, in one embodiment, the tail end of the handle is provided with a hook-type buckle that can be extended and retracted to a limited distance, which is used to clamp with the handle base mounted on the flexible joint end of the hydrogen storage output pipe to prevent the flexible joint from falling off and separating from the filling joint.

[0021] Furthermore, in one embodiment, the detection circuit also includes a combustible gas detection circuit, which realizes real-time detection of combustible gas through an electrochemical sensor, and transmits the combustible gas detection signal to the control module in real time, and the control module realizes data recognition and outputs warning information.

[0022] In a preferred embodiment, the detection circuit also includes a folding mechanism detection circuit, which uses a rotation angle sensor to detect the folding state of the foldable handle by measuring the tap position of the adjustable potentiometer, and then the control module generates and outputs prompt information based on the folding state information.

[0023] Optionally, in one embodiment, the detection module is provided with a state transmitting unit for unidirectionally transmitting the detection signal to the control module, and the state transmitting unit adopts a wireless radio frequency encoding chip and is in a sleep mode when there is no detection signal to be sent.

[0024] Furthermore, in a preferred embodiment, the control module includes a signal receiving unit, a single chip microcomputer and a peripheral circuit, the signal receiving unit is used to realize the reception of one or more detection signals, the single chip microcomputer adopts an STM32L071 single chip microcomputer, which is used to complete the control of each detection circuit and the hydrogen delivery valve, as well as data processing and generating corresponding output instructions;

[0025] The signal receiving unit adopts a wireless transceiver unit. In normal working state, it enters sleep mode in response to the command of the USART interface of the single-chip microcomputer. In idle state, it wakes up regularly according to a set period to listen for command reception requirements.

[0026] In an optional embodiment, the battery management unit is used to convert the power supply voltage and monitor the battery voltage in real time, and transmit the monitoring results to the control module, which outputs prompt information based on the monitoring results, wherein a DCDC conversion circuit is used to boost and buck the power supply.

[0027] On the other hand, based on the application aspects of the device described in any one or more of the above embodiments, the present invention also provides an application method of a filling connector anti-drop protection device capable of detecting a connection state. Preferably, in one embodiment, the method includes:

[0028] Device preparation steps: after verifying the stability of the bolts of the connection structure of the protection device, the protection device is fixedly connected to the flexible joint of the hydrogen storage output pipe so that the handle is in an unfolded state;

[0029] Filling joint tightening step: connect the filling joint of the tube bundle vehicle with filling requirements into the sleeve of the protection device, wrap the filling joint and tighten it with a handle;

[0030] Connection status identification step: During the tightening process, the detection module continuously uses the strain detection module to detect the rotation and tightening torque information of the flexible joint, and transmits it to the control module through the detection circuit. Based on the preset torque threshold value, it is determined that when the real-time rotation and tightening torque meets the set requirements, it indicates that the tightening state of the flexible joint meets the requirements, and a reminder instruction is output to stop tightening;

[0031] Handle tightening steps: clamp the hook buckle at the end of the handle to the handle base at the flexible joint end of the hydrogen storage output pipe, and then apply force in the direction of the sleeve to make the handle fully folded to prevent the filling joint from falling off;

[0032] Filling execution steps: Open the relevant hydrogen delivery valves of the hydrogen storage system to realize hydrogen filling.

[0033] Furthermore, in an optional embodiment, in the filling execution step, the combustible gas leakage and folding mechanism status data during the filling process are monitored in real time by the detection circuit of the detection module, and the control module generates and outputs warning information based on the real-time detection data.

[0034] Compared with the closest prior art, the present invention also has the following beneficial effects:

[0035] The present invention provides a charging joint anti-dropout protection device capable of detecting connection status and an application method. The connection structure of the device is formed by two sets of sleeves and a cylindrical structure being relatively connected by a bolt structure. The sleeve is used to wrap and tighten the charging joint. When the cylindrical structure is used, it wraps and tightens the hydrogen storage output pipe live joint and the tube bundle vehicle charging joint. Each set of sleeves and the cylindrical structure is provided with a handle for realizing the connection between the hydrogen storage output pipe live joint and the tube bundle vehicle charging joint, and locking and reinforcing the connection structure. The strain detection structure of the detection module detects the rotational tightening torque of the live joint during the tightening process. The control module generates prompt information by using a control program according to the detected signal. The application of the device has a sleeve function to replace a wrench, and the original pipeline does not need to be disassembled during installation, which is convenient and quick, can automatically detect that the connection is in place, output prompt information to the user, and prevent the live joint from being separated from the charging joint of the tube bundle vehicle. The device has wireless data transmission and control functions, and can upload fault conditions such as abnormal connection status and drop-off in real time to the control module, and make a quick response, thereby ensuring the overall reliability of the system and meeting the requirements of Internet of Things and intelligence.

[0036] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0038] Figure 1 It is a structural schematic diagram of a filling connector anti-dropping protection device capable of detecting connection status provided by an embodiment of the present invention;

[0039] Figure 2 It is a structural schematic diagram of the clamping state of the handle hook buckle and the handle base of the filling connector anti-drop protection device capable of detecting the connection state provided by an embodiment of the present invention;

[0040] Figure 3 It is a schematic diagram of the structure of the handle of the filling connector anti-dropping protection device capable of detecting the connection state provided by an embodiment of the present invention in a folded state;

[0041] Figure 4 It is a schematic diagram of the circuit structure of a state transmitting unit in a detection module of a filling connector anti-dropping protection device capable of detecting a connection state provided by an embodiment of the present invention;

[0042] Figure 5It is a schematic diagram of the principle structure of a signal amplifying circuit of a filling connector anti-dropping protection device capable of detecting a connection state provided by an embodiment of the present invention;

[0043] Figure 6 It is a schematic diagram of the circuit structure of a control module command receiving unit of a charging connector anti-drop protection device capable of detecting a connection state provided by an embodiment of the present invention;

[0044] Figure 7 It is a schematic diagram of the operating principle of a control module of a filling connector anti-dropping protection device capable of detecting a connection state provided by an embodiment of the present invention;

[0045] Figure 8 It is a schematic diagram of the principle flow of the control program of the control module of the filling connector anti-drop protection device capable of detecting the connection state provided by an embodiment of the present invention;

[0046] Fig. 9 It is a schematic diagram of the circuit principle of a battery management unit of a charging connector anti-drop protection device capable of detecting the connection status provided by an embodiment of the present invention;

[0047] Fig.10 It is a schematic diagram of the operating principle of the detection circuit of the filling connector anti-dropping protection device capable of detecting the connection state provided by an embodiment of the present invention;

[0048] Fig.11 It is a schematic diagram of the operating principle of a combustible gas detection circuit of a filling connector anti-dropping protection device capable of detecting a connection state provided by another embodiment of the present invention;

[0049] Fig.12 It is a schematic diagram of the operating principle of a folding mechanism detection circuit of a filling connector anti-drop protection device capable of detecting a connection state provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following will describe the implementation methods of the present invention in detail in conjunction with the accompanying drawings and embodiments, so that the implementers of the present invention can fully understand how the present invention applies technical means to solve technical problems and achieve the implementation process of technical effects and implement the present invention specifically according to the above implementation process. It should be noted that as long as there is no conflict, the various embodiments and various features of the embodiments in the present invention can be combined with each other, and the technical solutions formed are all within the protection scope of the present invention.

[0051] Although the flowcharts describe the operations as sequential processes, many of the operations may be performed in parallel, concurrently, or simultaneously. The order of the operations may be rearranged. A process may be terminated when its operations are completed, but may also have additional steps not included in the accompanying drawings. A process may correspond to a method, function, procedure, subroutine, subprogram, etc.

[0052] Computer devices include user devices and network devices. Among them, user devices or clients include but are not limited to computers, smart phones, PDAs, etc.; network devices include but are not limited to a single network server, a server group consisting of multiple network servers, or a cloud composed of a large number of computers or network servers based on cloud computing. Computer devices can be operated alone to implement the present invention, or they can be connected to the network and implement the present invention through interactive operations with other computer devices in the network. The network where the computer device is located includes but is not limited to the Internet, wide area network, metropolitan area network, local area network, VPN network, etc.

[0053] The terms "first", "second", etc. may be used herein to describe various units, but these units should not be limited by these terms, and these terms are used only to distinguish one unit from another unit. The term "and / or" used herein includes any and all combinations of one or more of the listed associated items. When a unit is referred to as being "connected" or "coupled" to another unit, it can be directly connected or coupled to the other unit, or there can be intermediate units.

[0054] The terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "one", "one" and "item" used herein are also intended to include plural numbers. It should also be understood that the terms "include" and / or "comprise" used herein specify the existence of stated features, integers, steps, operations, units and / or components, without excluding the existence or addition of one or more other features, integers, steps, operations, units, components and / or combinations thereof.

[0055] In the critical start-up period of clean energy development, hydrogen energy, as one of the most promising clean energy sources, occupies an important position in the energy structure. With the continuous consolidation of the industrialization foundation of hydrogen energy and the advancement of the industrialization process, the development of the automotive hydrogen energy industry has gradually entered a critical period; automotive hydrogen energy mainly refers to hydrogen energy used to provide energy for fuel cell vehicles. The upstream and downstream of the industrial chain covers a wide range, involving automotive hydrogen energy production, storage, transportation, refueling, and the application of hydrogen energy in fuel cell vehicles and related supporting links. The automotive hydrogen energy industry is shifting from technology research and development to demonstration application to industrialization, with steady progress in technological innovation and industrial development and continuous improvement of the supporting system.

[0056] Hydrogen molecules have a degrading effect on materials, high storage and transportation pressure, easy to leak and spread, and flammable and explosive. Safety is an important prerequisite for the development of the automotive hydrogen energy industry. From 2000 to the present, considering the four major links of the automotive hydrogen energy industry chain, namely, preparation and purification, hydrogen supply mother station, road transportation, and hydrogen refueling station, the query results based on international databases (such as the US H2Tools database, Japan High Pressure GasSafety Act database, EU HIAD database, and my country's information network) show that the number of hydrogen energy accidents in various countries is as high as 90 cases, of which the total number of accidents involving hydrogen filling in the two major links of hydrogen supply mother stations and hydrogen refueling stations is 54, accounting for as much as 60%. At the same time, due to the shortage of land resources and the high cost of building a station alone, existing gas stations are currently used to renovate comprehensive energy filling stations for vehicles, and hydrogen filling stations are gradually entering relatively densely populated areas. Based on this, it is necessary to pay more attention to the safety of the automotive hydrogen filling link.

[0057] At present, hydrogen energy is mainly transported by long tube trailers (tube bundle trucks) between hydrogen production plants (filling) and hydrogen refueling stations (unloading). When the tube bundle truck arrives at the destination, it needs to be connected to the filling equipment (unloading equipment) at the station. The existing process uses quick connectors and is tightened by on-site workers using wrenches. In order to prevent the live joints from falling off during the filling and unloading process and swinging due to high-pressure gas spray, causing personal injury accidents, after connecting the live joints, the on-site operators also need to hang the safety rope on the nearby pipeline to prevent the hydrogen hose from falling off.

[0058] The current filling pressure of hydrogen tube bundle trucks is 20MPa, and the pressure will be increased to 45MPa in the future. At present, after the operators of hydrogen tube bundle truck filling operations have tightened the joints, they mainly use soap solution to check whether there is leakage. The operation is cumbersome and unreliable, and there are many safety hazards, such as the following:

[0059] (1) When using soap solution for inspection, high-pressure gas is required. If the joint falls off, it will cause harm to the operator;

[0060] (2) Since the filling (discharging) time of hydrogen is generally several hours, or even more than 10 hours, there may be no gas leakage when the union is just connected, but as time goes by, hydrogen leakage may occur during the filling (discharging) process;

[0061] (3) Only when the fixed object to which the safety rope is tied is firm and the safety rope is tied at the joint, can the safety rope effectively prevent the movable joint from swinging around after it falls off. However, due to the usage habits, sense of responsibility, safety awareness and other reasons of different operators, it is common for the safety rope to not be tied or to be loosely tied on site;

[0062] (4) The tools used to tighten joints on site are not standardized. Some are open-end wrenches, some are flexible wrenches, and some are pipe clamps. As a result, different operators may tighten the joints to different degrees of tightness, and the joints may be threaded.

[0063] In order to solve the above problems, the present invention provides a filling joint anti-drop protection device that can detect the connection status, has the function of real-time detection of whether the filling joint of the hydrogen tube bundle vehicle is connected in place, has the function of real-time monitoring of hydrogen leakage during the filling (unloading) process, and has a safety protection device to prevent the hydrogen hose from falling off when the hydrogen tube bundle vehicle is filled and the hydrogen hose is broken; it prevents the hydrogen hose from bursting and causing falling off when high-pressure hydrogen is filled. The present invention can effectively ensure the safety of hydrogen tube bundle vehicle loading and unloading operations and improve the overall safety and reliability of hydrogen loading and unloading operations.

[0064] Next, the structural components, connection modes and functional principles of the system of the embodiment of the present invention are described in detail based on the drawings. Although the logical order of each operation is shown in the process of describing the operating principle of the system structure, in some cases, the operations shown or described can be performed in a different order than here.

[0065] Embodiment 1:

[0066] Figure 1 The schematic diagram of the structure of the filling connector anti-drop protection device capable of detecting the connection state provided by the first embodiment of the present invention is shown. Figure 1 It can be seen that the system includes: a connection structure, a handle, a handle base, a detection module, a control module and a battery management unit;

[0067] The connection structure is formed by two sleeves and a cylindrical structure being relatively connected by a bolt structure, and the sleeve and the cylindrical structure are fixedly connected by a connection block, and a bolt through hole is provided on the connection block;

[0068] The sleeve is arranged at the connection end of the filling joint with the tube bundle vehicle, and is used to wrap and tighten the filling joint;

[0069] One end of the cylindrical structure is fixedly connected to the sleeve through a connecting block, and the other end is used to connect the hydrogen storage output pipe joint, and when used, wraps and tightens the hydrogen storage output pipe joint and the tube bundle vehicle charging joint;

[0070] Each set of sleeves and cylindrical structures is provided with a handle, which is used to replace a wrench to connect the flexible joint of the hydrogen storage output pipe with the filling joint of the tube bundle vehicle, and to lock and reinforce the connection structure after the connection is completed; the handle base is fixedly sleeved at the flexible joint of the hydrogen storage output pipe to provide a clamping base for the handle;

[0071] The detection module includes a detection structure and a detection circuit, wherein the detection structure includes a strain detection structure, which is arranged between the rear end connection blocks of the sleeve and is used to detect the rotational tightening torque of the movable joint during the tightening process;

[0072] The detection circuit includes a signal amplification circuit, which amplifies the rotational tightening torque signal and transmits it to the control module;

[0073] The control module is in communication connection with the detection circuit and the hydrogen delivery valve, and is used for receiving the detection signal, controlling the hydrogen delivery valve according to the detection signal based on the control program, and outputting prompt information.

[0074] The filling joint anti-drop-off protection device capable of detecting the connection status provided by the above-mentioned embodiment of the present invention can automatically detect the connection status to prevent the movable joint from being separated from the filling joint of the tube bundle vehicle; it can be installed without disassembling or otherwise modifying the original pipeline, and has a socket function to replace a wrench. The combination of the handle and the socket structure effectively and conveniently ensures the overall reliability of the system.

[0075] Specifically, Figure 1 As shown, the connection structure includes a sleeve 1 and cylindrical structures 4 and 5. In a preferred embodiment, the sleeve adopts a hexagonal structure; the hexagonal sleeve 1 is located at the front end of the protection device, that is, close to one end of the tube bundle car, for wrapping and tightening the flexible joint.

[0076] The hexagonal sleeve is fixedly connected to the cylindrical structure through a connecting block. The sleeve is fixedly connected to both sides of the cylindrical structure through connecting blocks. Multiple bolt through holes are set on each connecting block. A strain gauge for torque detection is set between the upper and lower connecting blocks. It has the function of real-time monitoring of the torque of the live joint when tightening the live joint. When the torque of the live joint rotation and tightening reaches a certain value, the control module will sound and light alarm according to the torque information, prompting the operator to stop twisting the sleeve and give a reminder that the joint is connected in place.

[0077] Each sleeve and cylindrical structure is provided with a handle, and the handle is a foldable handle, and the handle is located at the end of the rear end of the protective device away from the tube bundle vehicle. Specifically, one end of the handle is movably connected to the sleeve and can rotate circumferentially along the connecting column, and is used to lock and reinforce the connection structure after the hydrogen storage output pipe joint is connected to the tube bundle vehicle charging joint to prevent the joint from falling off. The foldable handle is movably connected to the sleeve, so that the sleeve can be directly rotated and tightened by the handle when the hydrogen storage output pipe joint is connected to the tube bundle vehicle charging joint.

[0078] The handle base is fixedly sleeved at the flexible joint of the hydrogen storage output pipe to provide a clamping base for the handle.

[0079] In actual application, after the flexible joint is tightened, the handle is folded back in turn. The tail end of the handle is provided with a hook-type buckle that can be extended and retracted to a limited distance, which is used to clamp with the handle base fixedly sleeved on the flexible joint end of the hydrogen storage output pipe to prevent the flexible joint from falling off and separating from the filling joint, that is, the retractable hook-type buckle at the tail end of the sleeve handle is clamped with the corresponding handle base, such as Figure 2 As shown, the handle base is fixedly sleeved at the flexible joint end of the hydrogen storage output pipe; the handle is further pressed toward the sleeve so that it is in a fully folded state, close to the sleeve and the filling joint, and plays an anti-falling function. The protective device when the handle is in the fully folded state is as shown in FIG. Figure 3 shown.

[0080] A strain gauge pasting hole is provided between the upper and lower connecting blocks at the rear end of the sleeve, for pasting and setting the strain detection structure, and the strain detection structure adopts a strain resistor. That is, the strain detection structure adopts a strain resistor, which is arranged in the strain gauge pasting hole between the upper and lower connecting blocks at the rear end of the sleeve, and is pasted on the upper and lower connecting blocks respectively, for detecting the rotational tightening torque of the movable joint during the tightening process.

[0081] The detection module is provided with a state transmitting unit for unidirectionally transmitting the detection signal to the control module. The state transmitting unit adopts a wireless radio frequency encoding chip and is in a sleep mode when there is no detection signal to be sent. In actual application, the detection module realizes the unidirectional transmission of the sleeve rotation tightening torque information to the control module through the set state transmitting unit.

[0082] In an optional embodiment, the state transmitting unit uses a low-power wireless radio frequency encoding chip to achieve one-way transmission of information within a transmission distance of 10 meters. Its transmission current can be as low as 3mA, and its sleep current is below the microampere level. The circuit schematic diagram is shown in FIG. Figure 4 shown.

[0083] The detection circuit is connected to the state transmitting unit, and includes a signal amplifying circuit, specifically a weak signal amplifying circuit, which amplifies the rotation tightening torque signal and transmits it to the control module.

[0084] The weak signal amplification circuit measures the micro strain of the connection block by using the strain resistor placed in the strain gauge pasting hole at the rear end of the sleeve to achieve real-time measurement of the torque when the live joint is twisted. Two strain resistors are pasted on the upper and lower connection blocks respectively. This signal is extremely weak and easily interfered. The present invention completes the micro strain measurement through the weak signal amplification circuit, suppressing useless interference signals such as thermal noise and electromagnetic fields.

[0085] In an optional embodiment, the present invention uses a fully differential amplifier circuit to process weak signals. The fully differential amplifier circuit can effectively suppress useless interference signals such as thermal noise and electromagnetic fields. The principle structure of the circuit module is as follows: Figure 5shown.

[0086] The control module receives setting command information and detection status information processed by the detection circuit through a set command receiving unit. The setting command information includes pre-factory coefficient calibration information and on-site limit setting information, etc. The detection status information includes rotational tightening torque information. Specifically, a low-cost, low-sleep current wireless data transceiver module can be selected as the command receiving unit.

[0087] The schematic diagram of the command receiving unit is as follows: Figure 6 As shown in the figure, U8 is a 433Mhz wireless transceiver module. Under normal working conditions, the microcontroller sends a command through the USART interface to put it into sleep mode. When the device is in idle state, the timing wake-up module listens whether there is a command issued by the control module.

[0088] In an optional embodiment, the control module includes a single-chip microcomputer and peripheral circuits, and uses a low-power single-chip microcomputer to implement control of relevant circuits of each unit, data acquisition, status transmission, etc. based on a pre-set control program. The peripheral circuit can provide the single-chip microcomputer with a stable power-on reset signal and power supply filtering, etc.

[0089] In practical application, the embodiment of the present invention uses the ultra-low power consumption single-chip microcomputer STM32L071 to complete the control of each unit circuit, data collection and status transmission, etc. Its peripheral circuit mainly provides the single-chip microcomputer with a stable power-on reset signal and a power green wave, etc. The schematic diagram of the control module is as follows Figure 7 As shown in the figure, resistor R17 and capacitor C15 form a power-on reset circuit, which provides a 10mS low-level signal to the reset pin of the microcontroller at the moment of power-on, setting the internal registers of the microcontroller to the initial state.

[0090] Among them, the control program makes judgments or calculations based on the state information obtained by detection according to the needs, generates corresponding control instructions according to the judgment results or calculation results, and executes them. For example, the rotational tightening torque information of the strain detection module reaches the control module after being processed by the weak signal amplification circuit. The control program compares the rotational tightening torque information with the pre-stored torque threshold value. If the difference between the current rotational tightening torque and the pre-stored torque threshold value meets the set requirements, it indicates that the connection and tightening state of the live joint and the tube bundle vehicle charging joint meet the requirements. The control module then issues an audible and visual alarm to prompt the operator to stop twisting the sleeve and gives a reminder that the joint is in place. The main program flow chart of the control program is as follows: Figure 8 shown.

[0091] The battery of the embodiment of the present invention adopts ER14250 lithium-ion battery, whose full-power working output voltage is 3.6V and empty-power output voltage is 2V. However, the working voltage of multiple unit circuits such as single-chip microcomputer system, folding mechanism detection, leakage detection, etc. is 3.3V, and the voltage fluctuation is required to be no more than 1mV.

[0092] Furthermore, the battery management unit is used to convert the power supply voltage, monitor the battery voltage in real time, transmit the monitoring results to the control module, and the control module outputs prompt information according to the monitoring results, wherein a DCDC conversion circuit is used to boost and reduce the power supply. In the embodiment of the present invention, the battery management unit uses a DCDC conversion circuit, which can both boost and reduce the voltage, and can effectively utilize the residual power in the battery to reduce the frequency of on-site battery replacement; at the same time, it has a real-time battery voltage monitoring function. When the voltage is lower than a certain value, the control module can be used to remind you to replace the battery in the form of voice or light indication; the circuit schematic diagram of the battery management unit is shown in the figure Fig. 9 shown.

[0093] like Fig. 9 As shown, U1 in the circuit is a high-efficiency step-up and step-down power supply chip, whose input voltage can be as low as 1.2V, and can stably output 3.3V DC voltage, and the conversion efficiency can reach more than 97%, thereby reducing the power consumption of the whole machine. U4 is an ultra-low power integrated operational amplifier, whose quiescent current is less than 30nA and bias current is less than 10fA, so the front end uses megohm-level resistors to divide the voltage output of the battery without affecting the voltage division effect, and can also reduce the energy loss of the battery caused by voltage division.

[0094] In an optional embodiment, the control module, connection circuit, battery management unit and power supply are integrated in a high-temperature resistant protective shell. During the filling process, the protective shell can be fixedly set on a structure whose distance from the strain detection module meets the set conditions to avoid the required connection circuit being too long; for example, it can be set at the sleeve of the connection structure or at the base of the handle.

[0095] In an optional embodiment, the protection device is further provided with a connection bracket matching the protection shell, and when necessary, the connection bracket can detachably fix the protection shell on a structure that meets the requirements.

[0096] The anti-drop-off protection device for the filling joint of the hydrogen tube bundle vehicle according to the embodiment of the present invention can automatically detect whether the connection is in place, prevent the live joint from being separated from the filling joint of the tube bundle vehicle, standardize on-site operation, and complete the installation without disassembling or otherwise modifying the original pipeline. It also has a socket function to replace a wrench, which is convenient and quick.

[0097] Embodiment 2:

[0098] The filling connector anti-drop protection device capable of detecting the connection state provided in the first embodiment of the present invention comprises: a connection structure, a handle, a handle base, a detection module, a control module and a battery management unit;

[0099] The connection structure is formed by two sleeves and a cylindrical structure being relatively connected by a bolt structure, and the sleeve and the cylindrical structure are fixedly connected by a connection block, and a bolt through hole is provided on the connection block;

[0100] The sleeve is arranged at the connection end of the filling joint with the tube bundle vehicle, and is used to wrap and tighten the filling joint;

[0101] One end of the cylindrical structure is fixedly connected to the sleeve through a connecting block, and the other end is used to connect the hydrogen storage output pipe joint, and when used, wraps and tightens the hydrogen storage output pipe joint and the tube bundle vehicle charging joint;

[0102] Each set of sleeves and cylindrical structures is provided with a handle, which is used to replace a wrench to connect the flexible joint of the hydrogen storage output pipe with the filling joint of the tube bundle vehicle, and to lock and reinforce the connection structure after the connection is completed; the handle base is fixedly sleeved at the flexible joint of the hydrogen storage output pipe to provide a clamping base for the handle;

[0103] The detection module includes a detection structure and a detection circuit, wherein the detection structure includes a strain detection structure, which is arranged between the rear end connection blocks of the sleeve and is used to detect the rotational tightening torque of the movable joint during the tightening process;

[0104] The detection circuit includes a signal amplification circuit, which amplifies the rotational tightening torque signal and transmits it to the control module;

[0105] The control module is in communication connection with the detection module and the hydrogen delivery valve, and is used for receiving the detection signal, controlling the hydrogen delivery valve according to the detection signal based on the control program, and outputting prompt information.

[0106] The anti-drop protection device for the tube bundle vehicle filling joint with the connection status detection function provided by the above embodiment of the present invention can automatically detect the connection status and prevent the flexible joint from being separated from the filling joint of the tube bundle vehicle; it can complete the installation without disassembling the original pipeline and other modifications, and has a sleeve function to replace the wrench, effectively and conveniently ensuring the overall reliability of the system. Embodiment 2 is a variation of Embodiment 1, so the specific features that are the same or similar to Embodiment 1 will not be repeated, and only the distinguishing steps will be described below.

[0107] Furthermore, the tube bundle vehicle filling joint anti-dropout protection device with connection status detection function provided in this embodiment of the present invention also has a real-time gas leakage monitoring function. During the filling and unloading process, once a leak is found, the control module immediately cuts off the gas source; it has wireless data transmission and control functions, and can upload leakage, dropout and other fault conditions to the control module in real time, and make a quick response, thereby ensuring the overall reliability of the system.

[0108] In this embodiment, the device also has the functions of folding mechanism position detection, combustible gas micro-leakage detection and data upload; based on this, the detection principle of the detection circuit is as follows Fig.10 As shown, the detection circuit also includes: a combustible gas detection circuit and a folding mechanism state detection circuit.

[0109] In a preferred embodiment, the detection circuit also includes a combustible gas detection circuit, which realizes real-time detection of combustible gas through an electrochemical sensor, and transmits the combustible gas detection signal to the control module in real time, and the control module realizes data recognition and outputs warning information.

[0110] The combustible gas detection circuit can adopt combustible gas detection sensors based on the following principles, including electrochemical, catalytic combustion, photoionization, thermopile, and micromechanical, taking into account various factors such as performance, cost, and structure.

[0111] In an optional embodiment, the present invention uses an electrochemical (fuel cell type) sensor for combustible gas detection, which has the advantages of low power consumption, high accuracy, high sensitivity, wide linear range, strong anti-interference ability, excellent repeatability and stability, etc. The driving circuit principle is as follows Fig.11 As shown, preferably, the number of the combustible gas sensors is one or more, and they are arranged at the connection of the filling joint of the tube bundle vehicle.

[0112] On the other hand, in an optional embodiment, the detection circuit also includes a folding mechanism detection circuit, which uses a rotation angle sensor to detect the folding state of the foldable handle by measuring the tap position of the adjustable potentiometer, and then the control module generates and outputs prompt information based on the folding state information.

[0113] The folding mechanism detection circuit comprehensively considers various requirements such as cost, system performance, installation form, power consumption, etc., and can choose to use acceleration sensors to detect inclination angles, travel switches to detect, etc. to detect when the handle is folded into place.

[0114] In an optional embodiment, the folding mechanism detection circuit of this embodiment uses a rotation angle sensor, which has an adjustable potentiometer inside. As long as the position of the adjustable potentiometer tap is measured, the folding state of the handle can be determined. The principle of the detection circuit is as follows: Fig.12As shown. In the figure, R1 is a rotation angle sensor, and the resistors R3 and R2 connected in series above and below it are respectively used to reduce the current flowing through the resistor and reduce the power consumption of the system; when the handle is folded, the tap of R1 will change, and the voltage between the tap and GND will change accordingly. The function of the operational amplifier in the figure is to perform impedance matching and improve the accuracy of measurement. Preferably, the number of the acceleration sensors is 2, which are respectively set at the places where the displacement changes greatly during the folding process of the handle, such as the middle active connection node of the handle.

[0115] Correspondingly, in this embodiment, the control module receives setting command information and detection status information processed by the detection circuit through a set command receiving unit. The setting command information includes pre-factory coefficient calibration information and on-site limit setting information, etc. The detection status information includes rotational tightening torque information, battery power monitoring information, combustible gas detection information, and folding status detection information of the folding mechanism. Specifically, a low-cost, low-sleep current wireless data transceiver module can be selected as the command receiving unit.

[0116] In a preferred embodiment, the control module includes a signal receiving unit, a single-chip microcomputer and a peripheral circuit. The signal receiving unit is used to realize the reception of one or more detection signals. The single-chip microcomputer adopts an STM32L071 single-chip microcomputer, which is used to complete the control of each detection circuit and the hydrogen delivery valve, as well as to perform data processing and generate corresponding output instructions;

[0117] The signal receiving unit adopts a wireless transceiver unit. In normal working state, it enters sleep mode in response to the command of the USART interface of the single-chip microcomputer. In idle state, it wakes up regularly according to a set period to listen for command reception requirements.

[0118] The schematic diagram of the command receiving unit is as follows: Figure 6 As shown in the figure, U8 is a 433Mhz wireless transceiver module. Under normal working conditions, the microcontroller sends a command through the USART interface to put it into sleep mode. When the device is in idle state, the timing wake-up module listens whether there is a command issued by the control module.

[0119] In an optional embodiment, the control module includes a single-chip microcomputer and peripheral circuits, and uses a low-power single-chip microcomputer to implement control of various types of detection circuits, data acquisition, status transmission, etc. based on a pre-set control program. The peripheral circuit can provide the single-chip microcomputer with a stable power-on reset signal and power supply filtering, etc.

[0120] In practical application, the embodiment of the present invention uses the ultra-low power consumption single-chip microcomputer STM32L071 to complete the control of each unit circuit, data collection and status transmission, etc. Its peripheral circuit mainly provides the single-chip microcomputer with a stable power-on reset signal and a power green wave, etc. The schematic diagram of the control module is as follows Figure 7As shown in the figure, resistor R17 and capacitor C15 form a power-on reset circuit, which provides a 10mS low-level signal to the reset pin of the microcontroller at the moment of power-on, setting the internal registers of the microcontroller to the initial state.

[0121] The control program performs judgment or calculation based on the detected status information according to the demand, generates corresponding control instructions according to the judgment result or calculation result, and executes them.

[0122] In an optional embodiment, the control module, connecting circuit, battery management unit and power supply are integrated in a high-temperature resistant protective shell. During the filling process, the protective shell can be fixedly set on a structure whose distance from the sensor and the strain detection module meets the set conditions to avoid the required connecting circuit being too long; for example, it can be set at the sleeve of the connecting structure or at the base of the handle.

[0123] In an optional embodiment, the protection device is further provided with a connection bracket matching the protection shell, and when necessary, the connection bracket can detachably fix the protection shell on a structure that meets the requirements.

[0124] The anti-drop protection device for the filling joint of the hydrogen tube bundle vehicle of this embodiment can automatically detect that the connection is in place to prevent the live joint from being separated from the filling joint of the tube bundle vehicle; it can complete the installation without disassembling the original pipeline or other modifications, and has a sleeve function to replace the wrench; it has a real-time gas leakage monitoring function; in addition, during the entire filling (unloading) process, it has a real-time gas leakage monitoring function, and once a leak is found, the control module can immediately cut off the gas source and output a prompt message, thereby improving the safety of the operation. Furthermore, it has wireless data transmission and control functions, and can upload leakage, dropout and other fault conditions to the control module in real time, and respond quickly, ensuring the overall reliability of the system and meeting the requirements of Internet of Things and intelligence.

[0125] At present, the automotive hydrogen energy industry is in a period of rapid development, and the supporting infrastructure such as hydrogen refueling stations and hydrogen supply stations will inevitably develop rapidly. The hydrogen supply between hydrogen refueling stations and hydrogen supply stations is basically transported by road by tube bundle vehicles. The hydrogen loading and unloading time in the station is relatively long. The reliability of the connection between the tank truck and the loading and unloading pipeline determines the safety of the entire loading and unloading operation. The current method of tightening the quick-release joints with a wrench by on-site workers has the risk of personal injury due to high-pressure gas spraying and swinging, so the safer hydrogen tube bundle vehicle filling joint anti-drop protection device provided by the present invention has a good application development prospect.

[0126] In the filling connector anti-dropout protection device capable of detecting the connection status provided in an embodiment of the present invention, each module or unit structure can operate independently or in combination according to actual connection setting requirements and signal processing requirements to achieve corresponding technical effects.

[0127] Embodiment three:

[0128] The device is described in detail in the embodiments disclosed in the above invention. Based on other aspects of the device described in any one or more embodiments, the present invention also provides an application method of a charging connector anti-dropping protection device capable of detecting a connection state. The method is applied to the charging connector anti-dropping protection device capable of detecting a connection state described in any one or more embodiments. Specific embodiments are given below for detailed description.

[0129] Specifically, the application method of the filling connector anti-dropping protection device capable of detecting the connection state provided by the embodiment of the present invention includes:

[0130] Device preparation steps: after verifying the stability of the bolts of the connection structure of the protection device, the protection device is fixedly connected to the flexible joint of the hydrogen storage output pipe so that the handle is in an unfolded state;

[0131] Filling joint tightening step: connect the filling joint of the tube bundle vehicle with filling requirements into the sleeve of the protection device, wrap the filling joint and tighten it with a handle;

[0132] Connection status identification step: During the tightening process, the detection module continuously uses the strain detection module to detect the rotation and tightening torque information of the flexible joint, and transmits it to the control module through the detection circuit. Based on the preset torque threshold value, it is determined that when the real-time rotation and tightening torque meets the set requirements, it indicates that the tightening state of the flexible joint meets the requirements, and a reminder instruction is output to stop tightening;

[0133] Handle tightening steps: clamp the hook buckle at the end of the handle with the handle base at the flexible joint end of the hydrogen storage output pipe, and then apply force in the direction of the sleeve to make the handle fully folded to prevent the filling joint from falling off;

[0134] Filling execution steps: Open the relevant hydrogen delivery valves of the hydrogen storage system to realize hydrogen filling.

[0135] Furthermore, in a preferred embodiment, in the filling execution step, the combustible gas leakage and the folding mechanism status data during the filling process are monitored in real time by the detection circuit of the detection module, and the control module generates and outputs warning information based on the real-time detection data.

[0136] The anti-drop protection device for the filling connector capable of detecting the connection state comprises: a connection structure, a handle, a handle base, a detection module, a control module and a battery management unit;

[0137] The connection structure is formed by two sleeves and a cylindrical structure being relatively connected by a bolt structure, and the sleeve and the cylindrical structure are fixedly connected by a connection block, and a bolt through hole is provided on the connection block;

[0138] The sleeve is arranged at the connection end of the filling joint with the tube bundle vehicle, and is used to wrap and tighten the filling joint;

[0139] One end of the cylindrical structure is fixedly connected to the sleeve through a connecting block, and the other end is used to connect the hydrogen storage output pipe joint, and when used, wraps and tightens the hydrogen storage output pipe joint and the tube bundle vehicle charging joint;

[0140] Each set of sleeves and cylindrical structures is provided with a handle, which is used to replace a wrench to connect the flexible joint of the hydrogen storage output pipe with the filling joint of the tube bundle vehicle, and to lock and reinforce the connection structure after the connection is completed; the handle base is fixedly sleeved at the flexible joint of the hydrogen storage output pipe to provide a clamping base for the handle;

[0141] The detection module includes a detection structure and a detection circuit, wherein the detection structure includes a strain detection structure, which is arranged between the rear end connection blocks of the sleeve and is used to detect the rotational tightening torque of the movable joint during the tightening process;

[0142] The detection circuit includes a signal amplification circuit, which amplifies the rotational tightening torque signal and transmits it to the control module;

[0143] The control module is in communication connection with the detection module and the hydrogen delivery valve, and is used for receiving the detection signal, controlling the hydrogen delivery valve according to the detection signal based on the control program, and outputting prompt information.

[0144] Preferably, in one embodiment, the sleeve of the protective device adopts a hexagonal structure, and the handle adopts a foldable handle, one end of which is movably connected to the sleeve, so that the sleeve can be directly rotated and tightened by the handle when the movable joint of the hydrogen storage output pipe is connected to the filling joint of the tube bundle vehicle.

[0145] Furthermore, in an optional embodiment, the sleeve is fixedly connected to both sides of the cylindrical structure via connecting blocks, and a plurality of bolt through holes are provided on each connecting block.

[0146] Furthermore, in one embodiment, a strain gauge pasting hole is provided between the upper and lower connecting blocks at the rear end of the sleeve for pasting and setting the strain detection structure, and the strain detection structure adopts a strain resistance sheet.

[0147] In a preferred embodiment, the tail end of the handle is provided with a hook-type buckle that can be extended and retracted to a limited distance, which is used to clamp with the handle base fixedly sleeved on the flexible joint end of the hydrogen storage output pipe to prevent the flexible joint from falling off and separating from the filling joint.

[0148] Optionally, in one embodiment, the detection circuit also includes a combustible gas detection circuit, which realizes real-time detection of combustible gas through an electrochemical sensor, and transmits the combustible gas detection signal to the control module in real time, and the control module realizes data recognition and outputs warning information.

[0149] In a preferred embodiment, the detection circuit also includes a folding mechanism detection circuit, which uses a rotation angle sensor to detect the folding state of the foldable handle by measuring the tap position of the adjustable potentiometer, and then the control module generates and outputs prompt information based on the folding state information.

[0150] Furthermore, in one embodiment, the detection module is provided with a state transmitting unit for unidirectionally transmitting the detection signal to the control module, and the state transmitting unit adopts a wireless radio frequency encoding chip and is in a sleep mode when there is no detection signal to be sent.

[0151] Specifically, in an optional embodiment, the control module includes a signal receiving unit, a single-chip microcomputer and a peripheral circuit, the signal receiving unit is used to realize the reception of one or more detection signals, and the single-chip microcomputer adopts an STM32L071 single-chip microcomputer, which is used to complete the control and data processing of each detection circuit and generate corresponding output instructions;

[0152] The signal receiving unit adopts a wireless transceiver unit. In normal working state, it enters sleep mode in response to the command of the USART interface of the single-chip microcomputer. In idle state, it wakes up regularly according to a set period to listen for command reception requirements.

[0153] In actual application, in an optional embodiment, the battery management unit is used to convert the power supply voltage, monitor the battery voltage in real time, transmit the monitoring results to the control module, and the control module outputs prompt information according to the monitoring results, wherein the DCDC conversion circuit is used to boost and buck the power supply.

[0154] For the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0155] It should be pointed out that in other embodiments of the present invention, the method can also obtain a new filling joint anti-fall-off protection application method by combining one or several of the above-mentioned embodiments to achieve safe optimization of the hydrogen filling operation process.

[0156] It should be noted that, based on the method in any one or more of the above-mentioned embodiments of the present invention, the present invention also provides a storage medium, on which is stored a program code that can implement the method as described in any one or more of the above-mentioned embodiments, and when the code is executed by the operating system, it can implement the application method of the filling connector anti-fall-off protection device that can detect the connection status as described above.

[0157] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0158] The "one embodiment" mentioned in the specification means that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrase "one embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0159] Although the embodiments disclosed in the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A filling connector anti-drop protection device capable of detecting the connection status, characterized in that: The device comprises: a connection structure, a handle, a handle base, a detection module, a control module and a battery management unit; The connection structure is formed by two sleeves and a cylindrical structure being relatively connected by a bolt structure, and the sleeve and the cylindrical structure are fixedly connected by a connection block, and a bolt through hole is provided on the connection block; The sleeve is arranged at the connection end of the filling joint with the tube bundle vehicle, and is used to wrap and tighten the filling joint; One end of the cylindrical structure is fixedly connected to the sleeve through a connecting block, and the other end is used to connect the hydrogen storage output pipe joint, and when used, wraps and tightens the hydrogen storage output pipe joint and the tube bundle vehicle charging joint; Each set of sleeves and cylindrical structures is provided with a handle, which is used to replace a wrench to connect the flexible joint of the hydrogen storage output pipe with the filling joint of the tube bundle vehicle, and to lock and reinforce the connection structure after the connection is completed; the handle base is fixedly sleeved at the flexible joint of the hydrogen storage output pipe to provide a clamping base for the handle; The detection module includes a detection structure and a detection circuit, wherein the detection structure includes a strain detection structure, which is arranged between the rear end connection blocks of the sleeve and is used to detect the rotational tightening torque of the movable joint during the tightening process; The detection circuit includes a signal amplification circuit, which amplifies the rotational tightening torque signal and transmits it to the control module; The control module is in communication connection with the detection module and the hydrogen delivery valve, and is used for receiving the detection signal, controlling the hydrogen delivery valve according to the detection signal based on the control program, and outputting prompt information.

2. The device according to claim 1, characterized in that The sleeve adopts a hexagonal structure, and the handle adopts a foldable handle, one end of which is movably connected to the sleeve, so that the sleeve can be directly rotated and tightened by the handle when the movable joint of the hydrogen storage output pipe is connected to the charging joint of the tube bundle vehicle.

3. The device according to claim 1, characterized in that The sleeve is fixedly connected to both sides of the cylindrical structure through connecting blocks, and a plurality of bolt through holes are arranged on each connecting block.

4. The device according to claim 1, characterized in that A strain gauge pasting hole is arranged between the upper and lower connecting blocks at the rear end of the sleeve, for pasting and setting the strain detection structure, wherein the strain detection structure adopts a strain resistance sheet.

5. The device according to claim 1, characterized in that The tail end of the handle is provided with a hook-type buckle that can be extended and retracted to a limited distance, which is used to clamp with the handle base fixedly sleeved on the flexible joint end of the hydrogen storage output pipe to prevent the flexible joint from falling off and separating from the filling joint.

6. The device according to claim 1, characterized in that The detection circuit also includes a combustible gas detection circuit, which realizes real-time detection of combustible gas through an electrochemical sensor and transmits the combustible gas detection signal to the control module in real time, and the control module realizes data recognition and outputs warning information.

7. The device according to claim 1, characterized in that The detection circuit also includes a folding mechanism detection circuit, which uses a rotation angle sensor to detect the folding state of the foldable handle by measuring the tap position of the adjustable potentiometer, and then the control module generates and outputs prompt information according to the folding state information.

8. The device according to claim 1, characterized in that The detection module is provided with a state transmitting unit for unidirectionally transmitting the detection signal to the control module. The state transmitting unit adopts a wireless radio frequency encoding chip and is in a sleep mode when there is no detection signal to be sent.

9. The device according to claim 1, characterized in that The control module includes a signal receiving unit, a single-chip microcomputer and a peripheral circuit. The signal receiving unit is used to realize the reception of one or more detection signals. The single-chip microcomputer adopts an STM32L071 single-chip microcomputer, which is used to complete the control and data processing of each detection circuit and generate corresponding output instructions; The signal receiving unit adopts a wireless transceiver unit. In normal working state, it enters sleep mode in response to the command of the USART interface of the single-chip microcomputer. In idle state, it wakes up regularly according to a set period to listen for command reception requirements.

10. The device according to claim 1, characterized in that The battery management unit is used to convert the power supply voltage and monitor the battery voltage in real time, and transmit the monitoring result to the control module, which outputs prompt information according to the monitoring result, wherein a DCDC conversion circuit is used to boost and reduce the power supply.

11. An application method of a filling joint anti-drop protection device capable of detecting a connection state, characterized in that: The method comprises: Device preparation steps: after verifying the stability of the bolts of the connection structure of the protection device, the protection device is fixedly connected to the flexible joint of the hydrogen storage output pipe so that the handle is in an unfolded state; Filling joint tightening step: connect the filling joint of the tube bundle vehicle with filling requirements into the sleeve of the protection device, wrap the filling joint and tighten it with a handle; Connection status identification step: During the tightening process, the detection module continuously uses the strain detection module to detect the rotation and tightening torque information of the flexible joint, and transmits it to the control module through the detection circuit. Based on the preset torque threshold value, it is determined that when the real-time rotation and tightening torque meets the set requirements, it indicates that the tightening state of the flexible joint meets the requirements, and a reminder instruction is output to stop tightening; Handle fastening steps: clamp the hook buckle at the tail end of the handle with the handle base set on the flexible joint end of the hydrogen storage output pipe, and then apply force in the direction of the sleeve to make the handle fully folded to prevent the filling joint from falling off; Filling execution steps: Open the relevant hydrogen delivery valves of the hydrogen storage system to realize hydrogen filling.

12. The method according to claim 11, characterized in that In the filling execution step, the combustible gas leakage and the folding mechanism status data during the filling process are monitored in real time by the detection circuit of the detection module, and the control module generates and outputs warning information based on the real-time detection data.

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