A long tube trailer IV type hydrogen storage cylinder fire test system

Abstract

The present invention relates to the field of building materials technology, and aims to provide a long tube trailer IV type hydrogen storage cylinder fire test system. The system includes a fire test system, a control system and a safety protection device; wherein the fire test system includes a combustion device arranged in a base, and a temperature-driven safety pressure relief device TPRD is provided at at least one end of the gas cylinder to be tested; the control system includes a control terminal and a data acquisition device, the data acquisition device is connected to the control terminal through a signal line, and various signal detection devices and electronic control devices arranged in the fire test system; the test system also includes a pressurization and discharge system composed of a gas source pressurization subsystem and a discharge subsystem. The present invention can meet the needs of local fire and overall fire tests of gas cylinders for different types of long tube trailers while meeting the local fire source length required for the test and without adjusting the structure. A higher inflation flow rate can be set relative to other devices to reduce the temperature rise during the pressurization process of large-volume gas cylinders.

Description

Technical Field

[0001] The invention relates to a hydrogen storage pressure vessel testing technology, and in particular to a long tube trailer IV type hydrogen storage gas cylinder fire test system, which is mainly used for the fire resistance performance test of the IV type hydrogen storage gas cylinder for the long tube trailer. Background Art

[0002] Hydrogen energy has the characteristics of diverse sources, efficient utilization, clean and environmentally friendly, high calorific value, and storability. It is the main carrier for building a diversified energy supply system based on clean energy. Compared with traditional small gas cylinders, long-tube trailer gas cylinders carry high pressure and large volume, which greatly improves transportation efficiency and reduces transportation costs. Plastic liner fiber fully wrapped composite material hydrogen storage cylinders (hereinafter referred to as Type IV hydrogen storage cylinders) have the characteristics of light weight, high pressure bearing capacity, and strong corrosion resistance. It is one of the important development directions for the efficiency of long-tube trailers.

[0003] Once the pneumatic brake pads of the rear tires of a long-tube trailer fail during service and are in a state of wear for a long time during driving, a fire may occur, and the local flame of the tires will gradually spread to the overall flame of the gas cylinder. In the event of a fire accident, the Type IV hydrogen storage bottle may fail in the form of composite material layer decomposition and plastic liner melting, resulting in hydrogen leakage or even explosion of the gas cylinder, causing serious harm. The current domestic standards for composite hydrogen storage bottles, including the national standard GB / T 35544 for Type III hydrogen storage bottles and the group standard TCATSI 02007 for Type IV hydrogen storage bottles, have a scope of application that cannot meet the fire test requirements of hydrogen storage bottles with a volume of more than 450L. Among foreign standards, ISO 11515 provides a fire resistance test method for Type IV pipelines, which provides a certain reference for the fire resistance test of Type IV hydrogen storage bottles for long-tube trailers. At present, there is no systematic fire test method for Type IV hydrogen storage bottles for long-tube trailers at home and abroad. At the same time, the existing composite hydrogen storage bottle test systems, such as CN201710461175.6, CN202110804123.0 and other patented systems, are designed for vehicle-mounted type III / IV hydrogen storage bottles, which are difficult to meet the fire resistance performance test requirements of long-tube trailers with large aspect ratios and large capacity type IV hydrogen storage bottles. For example, referring to TCATSI 02007, a local fire source should be set at the farthest distance from the safety relief device for gas cylinders equipped with a temperature-driven safety pressure relief device (hereinafter referred to as TPRD), and a local fire source should be set in the middle of the gas cylinder for gas cylinders with TPRDs arranged at both ends. At the same time, the system needs to take into account the overall fire of the gas cylinder. Referring to ISO11515, the local fire source length of the long-tube trailer type IV bottle greater than 450L should be 1.65 meters, and the fuel supply system and combustion row design of the existing system cannot simultaneously meet the fire test requirements of the two structural types of long-tube trailer type IV hydrogen storage cylinders. At the same time, in view of the large capacity of the long-tube trailer gas cylinder, the booster system needs to control the temperature rise of the gas in the cylinder while ensuring rapid pressure increase. Furthermore, the commonly used fire test benches are composed of two forms: gas fire source and liquid fire source. The flame size of the gas fire source is controllable, but the flame distribution is relatively uneven and is greatly affected by the environment. The liquid fire source is relatively evenly distributed and is less affected by the environment. The size of the long-tube trailer gas cylinder is larger than that of the vehicle-mounted cylinder. It is necessary to reasonably select the type of fire source according to the size of the test gas cylinder, the test requirements and the test environment, and the existing experimental device cannot switch between gas fire source and liquid fire source. Therefore, it is urgent to develop a safe and controllable fire test system suitable for long-tube trailer type IV hydrogen storage cylinders. Summary of the invention

[0004] The problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a long tube trailer IV type hydrogen storage cylinder fire test system.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0006] Provided is a long tube trailer IV type hydrogen storage cylinder fire test system, comprising a fire test system, a control system and a safety protection device; wherein the fire test system comprises a base for placing the gas cylinder to be tested, and a combustion device arranged in the base, and a temperature driven safety pressure relief device TPRD is arranged at at least one end of the gas cylinder to be tested; the control system comprises a control terminal and a data acquisition device, the data acquisition device is connected to the control terminal through a signal line, and various signal detection devices and electric control devices arranged in the fire test system; the test system also comprises a pressurization and discharge system composed of a gas source pressurization subsystem and a discharge subsystem;

[0007] The gas source pressurizing subsystem includes a test gas source, a pressure regulating valve, an electric control valve, a check valve, a gas filter, a gas pressurizing device, a safety valve, a cooler, a flow limiting valve, a check valve and a solenoid valve connected in sequence through pipelines, and the battery valve is connected to the pressurizing port of the gas cylinder; the cooler is connected to the water pump and the cold water tank through pipelines;

[0008] The discharge subsystem includes three groups of pipelines: a normal discharge pipeline equipped with a pressure sensor and a one-way valve, an emergency discharge pipeline equipped with a solenoid valve, and a pressure-maintaining pipeline equipped with a pressure-holding valve and a solenoid valve; wherein one end of the normal discharge pipeline is connected to the discharge port of the TPRD, one end of the emergency discharge pipeline is connected to the pressurizing port of the gas cylinder, one end of the pressure-maintaining pipeline is connected between the one-way valve and the solenoid valve, and the other ends of the three pipelines are connected to the discharge port through the one-way valve.

[0009] Brief description of the invention principle:

[0010] The long-tube trailer IV type hydrogen storage cylinder fire test system in the present invention is mainly composed of a fire test system, a control system, a safety protection device, a pressurization release system and an auxiliary release system. The gas cylinder to be tested is placed on a support structure, and the support structure can slide along the slide rail in the base. At the same time, the fuel supply pipeline is composed of a gas fuel source and a plurality of pipelines whose parallel relationship can be adjusted by valves, and each pipeline is connected to a throttle valve, a flow meter and a one-way valve. The combustion row is divided into multiple parts, and the position of the local fire source can be changed by adjusting the valve. The outermost side of the fire test system is a safety isolation device built of reinforced concrete structure. A sprinkler fire extinguishing device is arranged above the device, and an observation window made of tempered glass is arranged on the side of the device away from people.

[0011] The pressurized discharge system in the present invention consists of a pressurized subsystem and a discharge subsystem. A cold water tank is provided in the pressurized subsystem to cool the pressurized gas. In addition, the cold water tank is also externally connected to a sprinkler fire extinguishing device placed above the safety isolation device. The discharge subsystem includes a normal discharge pipeline, an emergency discharge pipeline and a pressure-maintaining pipeline. The normal discharge pipeline is connected to the discharge port of the gas cylinder temperature-controlled pressure relief device (TPRD), and the emergency discharge pipeline is connected to the gas cylinder charging port through the pressure-maintaining pipeline. The pressure-maintaining pipeline is provided with a pressure-holding valve, an electric control valve and a one-way valve, and is connected to the discharge port.

[0012] The present invention also includes an auxiliary relief system, which is equipped with a hot air blower and can melt the fusible alloy in an emergency. The system is activated only when the gas cylinder with safety relief devices at both ends is tested.

[0013] In the present invention, data of all valves except the manual valve, the ignition device, each temperature sensor, pressure sensor, flow meter, pressure gauge and video monitoring device are collected and stored by the data acquisition equipment and then transmitted to the control terminal through the data line. The control terminal controls the ignition device, the opening and closing status of each valve and the shooting angle of the video monitoring device.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) The present invention can open and close valves, adjust multiple fuel supply pipelines, and coordinately adjust the valves set at the combustion row / combustion pool and the position of the gas cylinder support structure, so as to meet the local fire source length required for the test without adjusting the structure, and meet the needs of local fire and overall fire tests of gas cylinders for different types of long tube trailers. In addition, the combustion row / combustion pool is connected to the test bench base by bolts, which can be quickly and easily replaced to realize gas fire source fire test and liquid fire source fire test.

[0016] (2) A gas water cooling device consisting of a cold water tank, a water pump, and a heat exchanger is installed in the pressurization pipeline, which can set a higher gas flow rate than other devices, reduce the temperature rise of large-volume gas cylinders during the pressurization process, thereby reducing the pressure drop caused by gas cooling during the pressure maintenance process and preventing safety problems caused by rapid inflation temperature rise. In addition, since a pressure-maintaining pipeline consisting of a pressure-maintaining valve, an electric control valve, and a one-way valve is provided, the gas cylinder can be quickly and easily filled to the required pressure for the test while saving the test gas as much as possible.

[0017] (3) A sprinkler fire extinguishing device is installed above the safety isolation device. The device is supplied with water by the cold water tank and water pump in the pressurized relief system. In case of emergencies, such as when the cylinder wrapping layer is still burning after the test is interrupted and the combustion exhaust fuel supply is cut off, the device can be used to remotely control the fire extinguishing, thereby minimizing the safety problems caused by emergencies.

[0018] (4) In addition to the release subsystem in the pressurized release system, an auxiliary release system is also set up. This system can be used to release the gas from the TPRD gas cylinders arranged at both ends. The two release systems can work simultaneously to achieve rapid pressure reduction of the gas cylinders in emergency situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the test system of the present invention;

[0020] Figure 2 It is a schematic diagram of the base and burning row in the fire test system;

[0021] Figure 3 It is a schematic diagram of the structure of the combustion row;

[0022] Figure 4 It is a schematic diagram of the safety protection device;

[0023] Figure 5 It is a schematic diagram of the structure of a liquid combustion pool. DETAILED DESCRIPTION

[0024] The implementation scheme of the present invention is described in detail below in conjunction with the accompanying drawings:

[0025] like Figure 1-5 As shown, the long-tube trailer IV type hydrogen storage cylinder fire test system includes a fire test system P1, a safety protection device, a pressurized release system P2, a secondary release system P3 and a control system P4.

[0026] The fire test system P1 includes a base for placing the gas cylinder 43 to be tested and a combustion device arranged in the base. The base is assembled by connecting multiple modules 55-59 of the same or similar structure end to end, and a slide rail is provided on the surface of the base. The gas cylinder 43 to be tested is placed horizontally on the support structure 60, and a support foot that can be installed in the slide rail is provided at the bottom thereof, so that the support structure 60 can move along the length direction of the base. There are multiple groups or multiple combustion devices, which are fixedly installed in each base module and located below the support structure 60. Temperature-driven safety pressure relief devices (TPRD) are provided at the two ends of the gas cylinder 43 to be tested.

[0027] The pressurization and release system P2 is composed of a gas source pressurization subsystem and a release subsystem SP1. A gas cylinder pressurization port and a temperature-driven safety pressure relief device TPRD are provided at one end of the gas cylinder 43 to be tested.

[0028] The gas source pressurization subsystem includes a test gas source 1, a pressure regulating valve 2, an electric control valve 4, a non-return valve 5, a gas filter 6, a gas pressurization device 7, a safety valve 8, a cooler 10, a flow limiting valve 14, a non-return valve 16 and a solenoid valve 17 connected in sequence through pipelines. The battery valve 17 is connected to the gas cylinder pressurization port; the cooler 10 is connected to the water pump 11 and the cold water tank 12 through a pipeline; pressure gauges 3 and 9 are respectively provided after the pressure regulating valve 2 and the gas pressurization device 7, a temperature gauge 13 is provided after the cooler, a flow meter 15 is provided after the flow limiting valve 14, and a pressure sensor 24 is provided after the solenoid valve 17. The gas cylinder pressurization port is also provided with a temperature sensor 25.

[0029] The discharge subsystem SP1 includes three groups of pipelines: a normal discharge pipeline L1 equipped with a pressure sensor 26 and a one-way valve 21, an emergency discharge pipeline L2 equipped with a solenoid valve 20, and a pressure-maintaining pipeline L3 equipped with a pressure-holding valve 18 and a solenoid valve 19; wherein, one end of the normal discharge pipeline L1 is connected to the discharge port of the TPRD, one end of the emergency discharge pipeline L2 is connected to the pressurizing port of the gas cylinder, one end of the pressure-maintaining pipeline L3 is connected between the one-way valve 16 and the solenoid valve 17, and the other ends of the three pipelines are connected to the discharge port 23 through the one-way valve 22.

[0030] Optionally, a second temperature-driven safety pressure relief device TPRD may be provided at the other end of the gas cylinder 43 to be tested, and an auxiliary relief system P3 may be connected to the TPRD venting port; the auxiliary relief system P3 includes a pressure sensor 44, a one-way valve 45 and a relief port 46 connected in sequence by pipelines, and a one-way valve 47 and a hot air blower 48 connected by pipelines; wherein the pressure sensor 44 and the one-way valve 47 are respectively connected to the venting port of the TPRD.

[0031] The control system P4 includes a control terminal 54 and a data acquisition device 53. The data acquisition device 53 is connected to the control terminal 54 through a signal line, as well as various signal detection devices and electric control devices provided in the fire test system.

[0032] The safety protection device includes a sprinkler fire extinguishing device, a remote video monitoring device, and a windproof explosion-proof wall 66 made of reinforced concrete; the windproof explosion-proof wall 66 covers the top and both sides of the gas cylinder 43 to be tested, and a tempered glass observation window 67 is provided on the windproof explosion-proof wall 66 located on the side, and the sprinkler fire extinguishing device 51 and the remote video monitoring device 52 are both arranged on the windproof explosion-proof wall on the top. The sprinkler fire extinguishing device 51 is connected to the outlet of the water pump 11 through a pipeline.

[0033] The combustion device can be a combustion row using gas fuel, or a combustion pool using liquid fuel; wherein, there are multiple groups of combustion rows, all of which are fixed in the base by means of a fastener 62 and bolts; each combustion row includes a fuel pipe 63 connected to an external fuel source, and a plurality of parallel combustion pipes 64 are arranged at intervals perpendicular to the fuel pipe 63, the combustion pipe 64 is hollow inside and communicates with the fuel pipe 63, and a plurality of upward fuel ports 65 are provided at intervals on each combustion pipe 64; when the combustion row is used, the fuel source is a fuel gas cylinder, and a pressure gauge 31, a solenoid valve 32, a throttle valve 33 and a flow meter 34 are sequentially arranged on the outlet pipeline of the fuel gas cylinder; at least three air supply pipelines whose parallel relationship can be adjusted by valves are connected after the flow meter 34, and a solenoid valve, a flow limiting valve and a one-way valve are provided on each air supply pipeline; the end of the air supply pipeline is connected to the fuel pipe 63.

[0034] Alternatively, there are multiple burning pools, all fixed in the base by a fastener 71 and bolts; each burning pool includes a liquid tank 69, which is connected to an external fuel source through a fuel pipe 70. When the burning pool is used, the height of the liquid fuel in the liquid tank 69 is controlled by a valve on an external fuel supply pipe connected to the fuel pipe 70.

[0035] The present invention will be described in more detail below in conjunction with specific implementation examples;

[0036] In this example, the gas cylinder to be tested has a total length of 5400 mm, an outer diameter of 670 mm, and a working pressure of 52 MPa.

[0037] like Figure 1 As shown, the long-tube trailer IV type hydrogen storage cylinder fire test system includes four parts: a fire test system P1, a pressurized release system P2, an auxiliary release system P3, and a control system P4, and is also equipped with a remote video monitoring device 55 and a safety protection device.

[0038] The main structural components in the fire test system P1, the booster release system P2 and the auxiliary release system P3 can be optionally connected by quick connectors, flange bolt structures and other connection methods. The fire test system P1 is placed in the safety protection device, and the gas cylinder 43 to be tested is placed on the support structure 60. The distance between the bottom of the gas cylinder and the combustion row is 100mm. K-type thermocouples are arranged on the surface of the gas cylinder according to the requirements of the fire test, and the thermocouple signal line can extend through the hole on the support structure 60. Ignitors are respectively arranged on both sides of the base modules 55-59, and the sensors, video monitoring equipment and electronic control equipment in the system are connected to the control system P4 through pipelines.

[0039] The fire test system P1 includes two sets of fuel supply pipelines L4 and L5. The two sets of pipelines provide fuel to the fire test bench 42 through three air supply pipelines L6, L7, and L8. The gas cylinder 43 to be tested is located on the fire test bench. The fuel supply pipeline L4 is composed of a fuel source 27, a pressure gauge 28, and a solenoid valve 29 (L5 is similar), and the air supply pipeline L6 is composed of a solenoid valve 35, a flow limiting valve 38, and a one-way valve 39 (L7 and L8 are similar). Pipeline L6 also controls the combustion area of ​​the connected combustion test bench by controlling the manual valve 40 (L8 is similar). The flow limiting valve 38 set in the pipeline L6-L8 serves to limit the maximum flow rate to prevent excessive flames caused by misoperation and other reasons, and the one-way valve 39 serves to prevent fuel backflow.

[0040] For a gas cylinder with only a single TPRD, a 1650 mm long local flame is applied on the side away from the discharge device: the support structure 60 is moved so that the gas cylinder corresponds to the bases 56-59, wherein the combustion row of the base 56 will provide a local fire source, the gas cylinder is placed on the support structure 60, the TPRD is located above the base 59 and a protective cover with a thickness of less than 4 mm is arranged (not shown in the figure), the manual valve 40 is closed, the manual valve 41 is opened, and the fuel supply pipeline L4 and the air supply pipeline L8 are used to supply fuel to the local fire source.

[0041] for Figure 1 A gas cylinder with TPRDs at both ends is provided with a 1650 mm long local flame in the middle: the support structure 60 is moved so that the gas cylinder corresponds to the base modules 55-58, wherein the combustion row of the module 57 will provide a local fire source, the gas cylinder is placed on the support structure 60 and a protective cover with a thickness of less than 4 mm is arranged at the TPRD (not shown in the figure), the manual valve 40 is opened, the manual valve 41 is closed, and the fuel supply pipeline L4 and the air delivery pipeline L6 supply fuel to the local fire source.

[0042] Take the gas cylinder with TPRD at both ends as an example to explain the specific operation: open the solenoid valves 29 and 36, adjust the throttle valve 33 so that the flow meter 34 reaches the required flow, start the ignition device, and form a local flame. When it is necessary to adjust to the overall flame, open the solenoid valves 32, 35 and 37, start the ignition devices at the base modules 55, 56 and 58, form the overall flame, and adjust the throttle valve 33 so that the flow meter 34 reaches the required flow.

[0043] The pressurized relief system P2 contains a relief subsystem SP1, which includes three parts: a normal relief pipeline L1 composed of a pressure sensor 26 and a one-way valve 21, an emergency relief pipeline L2 composed of a solenoid valve 20, and a pressure-maintaining pipeline L3 composed of a solenoid valve 17, a pressure-holding valve 18, and a solenoid valve 19. The normal relief pipeline L1 is connected to the relief port of the TPRD, the emergency relief pipeline L2 and the pressure-maintaining pipeline L3 are connected to the pressurizing port of the gas cylinder, and all three pipelines are externally connected to a one-way valve 22 and a relief port 23.

[0044] The boosting pipeline in the boosting and releasing system includes a test gas source 1, a pressure regulating valve 2, a pressure gauge 3, an electric control valve 4, a check valve 5, a gas filter 6, a gas boosting device 7, a safety valve 8, a pressure gauge 9, a cooler 10, a thermometer 13, a flow limiting valve 14, a flow meter 15, a check valve 16, a solenoid valve 17, and a pressure sensor 24. The cooler 10 is supplied with water by a water pump 11 and a cold water tank 12, and is controlled by a solenoid valve 49. The one-way valve 5 can prevent the gas from flowing back from the low-pressure end of the gas boosting device, the gas filter 7 can remove impurities, the safety valve 8 can prevent the gas pressure from being too high and damaging the pipeline, the pressure gauge 9 monitors the gas pressure after boosting, the cooler 10 can reduce the gas temperature after boosting and improve the boosting efficiency of the gas cylinder, the thermometer 13 monitors the gas temperature after cooling, the flow limiting valve 14 limits the maximum gas flow to protect the gas cylinder, the one-way valve 16 prevents the high-pressure gas in the gas cylinder from flowing back, the pressure holding valve 18 is set to the working pressure of the gas cylinder 52MPa for the gas cylinder pressure maintenance, the pressure sensor 24 is used to monitor the pressure in the bottle, the pressure sensor 26 is used to monitor the normal discharge pipeline pressure, and the one-way valve 21 prevents the high-pressure gas from affecting the normal discharge pipeline and TPRD during the pressure maintenance process. When an emergency occurs and the TPRD is not started, the gas in the bottle can be quickly released by opening the solenoid valve 20.

[0045] The specific operation of increasing the pressure of the gas cylinder 43 to be tested is as follows: adjust the pressure regulating valve 2 so that the pressure gauge 3 reaches the required pressure reading, open the solenoid valves 4, 17 and 49, start the gas boosting device 7 and the water pump 11, and the gas is filtered by the gas filter 6 and then boosted by the gas boosting device 7, and then cooled by the cooler 10 to quickly increase the pressure of the gas cylinder to the required pressure, which is 55Mpa in this example, slightly higher than the working pressure of 52Mpa, close the gas boosting device 7, the water pump 11 and the solenoid valves 4 and 49, maintain the pressure until the pressure inside the gas cylinder is stable, and open the solenoid valve 19 to reduce the pressure of the gas cylinder to the working pressure.

[0046] The auxiliary release system P3 is connected to the venting port of another TPRD device, and includes a pressure sensor 44, a one-way valve 45, a release port 46, a one-way valve 47 and a hot air blower 48. When an emergency occurs and the TPRD is not started, the hot air blower 48 can be used to melt the fusible alloy in the TPRD to release the gas in the bottle.

[0047] The control system P4 includes a data acquisition system 53 and a control terminal 54. The data acquisition system 53 is connected to the following valves: pressure regulating valve 2, solenoid valve 4, solenoid valve 17, pressure holding valve 18, solenoid valve 29, solenoid valve 20, solenoid valve 29, solenoid valve 32, throttle valve 33, solenoid valves 35-37, flow limiting valve 38, solenoid valve 49, solenoid valve 50, and is connected to the following sensors: pressure gauge 3, pressure gauge 9, temperature gauge 13, flow meter 15, pressure sensor 24, temperature sensor 25, pressure sensor 26, pressure gauge 28, pressure gauge 31, flow meter 34, pressure sensor 44, and a thermocouple on the surface of a gas cylinder (not shown in the figure). The following equipment is connected: a gas boosting device 7, a water pump 11, a hot air blower 48, a video monitoring device 52, and a combustion exhaust ignition device (not shown in the figure). The data acquisition device 53 collects and stores the data of all the above components and transmits them to the control terminal 54, which adjusts each electronically controlled valve and electronically controlled equipment.

[0048] like Figure 2 As shown, the upper part of the fire test bench is a support structure 60, which is made of refractory materials with low thermal conductivity. The partitions at both ends of the support structure 60 can prevent the TPRD from being directly exposed to fire, and the gas cylinder is fixed by the fixer 61. The lower part is composed of five modular bases, and each part of the base is provided with an independent combustion row. The support structure 60 can move on the slide rails on the modules 55 and 59. When it moves to the far right, it can be used for a single TPRD gas cylinder fire test, and the combustion row of the base 56 is a local fire source. When it moves to the far left, it can be used for a double TPRD gas cylinder fire test, and the base 57 is a local fire source. According to the different sizes of gas cylinders, the base and the support structure can be replaced to meet the test requirements. Among them, the modules 55 and 59 of this example are 225mm long, the modules 56 and 57 are 1650mm long, and the module 58 is 1875mm long.

[0049] like Figure 3 As shown, each base is installed with a combustion row shown in the figure, and the combustion row is fixed in the base by bolts through a fixture 62. The fire test requirements of gas cylinders of different sizes can be met by replacing combustion rows of different numbers. The combustion row is connected to an external fuel source through a fuel pipe 63, and a fuel port 65 with a diameter of 3mm is set on the combustion pipe 64 at intervals of 20mm. Among them, in this example, 14 combustion pipes 64 are arranged at intervals of 55mm, which can provide a continuous and stable fire source.

[0050] like Figure 4 and Figure 1As shown, the main body of the safety protection device is a windproof and explosion-proof wall 66 made of reinforced concrete, and four observation windows 67 made of tempered glass are arranged on the side of the wall away from the observer. A sprinkler fire extinguishing device 51 is arranged on the top, connected to the cold water tank 12 via a water pipe 68, and supplied with water by a water pump 11. In special circumstances, such as when the cylinder winding layer is still burning after the fire source fuel supply is stopped, the water pump 11 can be started and the solenoid valve 50 can be opened to extinguish the fire.

[0051] In addition, if Figure 5 As shown, the liquid combustion pool is provided with a liquid tank 69, which can be used to replace the combustion row for liquid fuel fire test. The combustion pool is fixed in the base by bolts through a fixture 71, and the fire test requirements of gas cylinders of different sizes can be met by replacing liquid tanks of different sizes. The combustion pool is connected to the liquid fuel (not shown in the figure) through a fuel pipe 70, and the liquid height in the liquid tank 69 can be controlled by a valve on an external fuel supply pipe connected to the fuel pipe 70.

[0052] The remote video monitoring device 52 may optionally include a high-definition camera and an infrared camera. The leakage position of the gas cylinder can be observed through the high-definition camera, and the heat distribution of the gas cylinder can be observed through the infrared camera.

[0053] Attached Figure 1-5 A preferred schematic block diagram of this example is given in the text, but the technical form involved in the present invention can be implemented in other similar solutions and is not limited to the description given in the specific implementation mode of the present invention. More precisely, the implementation process given in the present invention is a better way to more thoroughly and comprehensively understand the technical route of the present invention in the technical field involved in the invention. Any changes, improvements and modifications in structure, mode or method made according to the relevant content of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A long tube trailer IV type hydrogen storage cylinder fire test system, including a fire test system, a control system and a safety protection device; wherein, The fire test system includes a base for placing the gas cylinder to be tested, and a combustion device arranged in the base, and a temperature-driven safety pressure relief device TPRD is arranged at at least one end of the gas cylinder to be tested; the control system includes a control terminal and a data acquisition device, the data acquisition device is connected to the control terminal through a signal line, and various signal detection devices and electronic control devices arranged in the fire test system; it is characterized in that the test system also includes a pressurization and discharge system composed of a gas source pressurization subsystem and a discharge subsystem; The gas source pressurizing subsystem includes a test gas source, a pressure regulating valve, an electric control valve, a check valve, a gas filter, a gas pressurizing device, a safety valve, a cooler, a flow limiting valve, a check valve and a solenoid valve connected in sequence through pipelines, and the battery valve is connected to the pressurizing port of the gas cylinder; the cooler is connected to the water pump and the cold water tank through pipelines; The discharge subsystem includes three groups of pipelines: a normal discharge pipeline equipped with a pressure sensor and a one-way valve, an emergency discharge pipeline equipped with a solenoid valve, and a pressure-maintaining pipeline equipped with a pressure-holding valve and a solenoid valve; wherein one end of the normal discharge pipeline is connected to the discharge port of the TPRD, one end of the emergency discharge pipeline is connected to the pressurizing port of the gas cylinder, one end of the pressure-maintaining pipeline is connected between the one-way valve and the solenoid valve, and the other ends of the three pipelines are all connected to the discharge port through the one-way valve; The combustion device is a combustion row using gas fuel; there are multiple groups of combustion rows, all of which are fixed to the base by fasteners and bolts; each combustion row includes a fuel pipe connected to an external fuel source, and a plurality of parallel combustion pipes are arranged perpendicular to the fuel pipe at intervals, the combustion pipes are hollow inside and communicate with the fuel pipe, and a plurality of upward fuel ports are arranged at intervals on each combustion pipe; when the combustion row is used, the fuel source is a fuel gas cylinder, and a pressure gauge, a solenoid valve, a throttle valve and a flow meter are arranged in sequence on the outlet pipeline of the fuel gas cylinder; at least three air supply pipelines whose parallel relationship can be adjusted by valves are connected after the flow meter, and a solenoid valve, a flow limiting valve and a one-way valve are respectively arranged on each air supply pipeline; the end of the air supply pipeline is connected to the fuel pipe; or, The combustion device is a combustion pool using liquid fuel; there are multiple combustion pools, all of which are fixed to the base by means of a fixer and bolts; each combustion pool includes a liquid tank, which is externally connected to a fuel source via a fuel pipe; when the combustion pool is used, the height of the liquid fuel in the liquid tank is controlled by a valve on an external fuel supply pipe connected to the fuel pipe; The gas cylinder to be tested is placed horizontally on the supporting structure, and a supporting foot is provided at the bottom of the supporting structure; a slide rail is provided on the surface of the base, and the supporting structure is installed in the slide rail with its supporting foot and can move along the length direction of the base; the combustion device is fixedly installed in the base and is located below the supporting structure.

2. The test system according to claim 1, characterized in that: A second temperature-driven safety pressure relief device TPRD is also provided at the other end of the gas cylinder to be tested, and an auxiliary relief system is connected to the TPRD venting port; the auxiliary relief system includes a pressure sensor, a one-way valve and a relief port connected in sequence by pipelines, and a one-way valve and a hot air blower connected by pipelines; wherein the pressure sensor and the one-way valve are respectively connected to the venting port of TPRD.

3. The test system according to claim 1, characterized in that: On the pipeline of the gas source boosting subsystem: a pressure gauge is provided after the pressure regulating valve and the gas boosting device, a temperature gauge is provided after the cooler, a flow meter is provided after the flow limiting valve, and a pressure sensor is provided after the solenoid valve.

4. The test system according to claim 1, characterized in that: The safety protection device includes a sprinkler fire extinguishing device, a remote video monitoring device, and a windproof and explosion-proof wall made of reinforced concrete; the windproof and explosion-proof wall covers the top and both sides of the gas cylinder to be tested, and a tempered glass observation window is provided on the windproof and explosion-proof wall located on the side, and the sprinkler fire extinguishing device and the remote video monitoring device are both arranged on the windproof and explosion-proof wall at the top.

5. The test system according to claim 4, characterized in that: The sprinkler fire extinguishing device is connected to the outlet of the water pump through a pipeline.

6. The test system according to claim 1, characterized in that: The base is assembled by connecting a plurality of base modules with the same or similar structures end to end, and the combustion devices are in multiple groups or multiple groups and are respectively installed in each base module.

7. The test system according to claim 1, characterized in that: The gas cylinder pressurizing port of the gas cylinder to be tested is provided with a temperature sensor.

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