CN-118961085-B - Device with hydrogen filling and gas leakage detection functions and application method thereof

CN118961085BCN 118961085 BCN118961085 BCN 118961085BCN-118961085-B

Abstract

The invention discloses a device with a hydrogen filling and air leakage detection function, which comprises a connecting mounting plate, wherein a hole is formed in the middle of the connecting mounting plate, a detection air box is installed in the hole, a sealing top cover is arranged at the top end of the detection air box, a spring is sleeved on the outer wall of the upper part of the connecting mounting plate, the top end of the spring is fixedly connected with the lower end of the sealing top cover, a first air pressure gauge and an air transmission connector are arranged at the top end of the sealing top cover, an air leakage installation block is arranged at the top of the detection air box in the sealing top cover, an air leakage sealing ring is fixedly installed on the upper surface of the air leakage installation block, an air leakage fixing groove is formed in the inner surface of the air leakage installation block and used for installing an air leakage valve, an air guide pipeline is fixedly installed at the top of the detection air box, and a second air pressure gauge is installed at the bottom of the detection air leakage detection box.

Inventors

XU JIAMING
ZHANG YI
XIAO RONG
JIA HONGGANG
WANG YUANZHI
YAN FEI
Tu Xingyi

Assignees

中国长江电力股份有限公司

Dates

Publication Date: 20260505
Application Date: 20240703

Claims (11)

1. The device with the hydrogen filling and air leakage detection function comprises a connection mounting plate (3), and is characterized in that a hole is formed in the middle of the connection mounting plate (3), a detection air box (2) is installed in the hole, a seal top cover (1) is arranged at the top end of the detection air box (2), a spring (4) is sleeved on the outer wall of the upper part of the connection mounting plate (3), the top end of the spring (4) is fixedly connected with the lower end of the seal top cover (1), a first barometer (9) and an air delivery connector (10) are arranged at the top end of the seal top cover (1), an air leakage mounting block (5) is arranged at the top of the detection air box (2) in the seal top cover (1), an air leakage sealing ring (6) is fixedly installed on the upper surface of the air leakage mounting block (5), an air leakage fixing groove (7) is formed in the inner surface of the air leakage mounting block (5) and used for installing an air leakage valve, an air guide pipe (8) is fixedly installed at the top of the detection air box (2), a second barometer (11) is installed at the bottom of the detection air leakage valve, an exhaust valve (12) is installed on the side face of the detection air valve, and an alarm device is arranged on the exhaust valve (12).
2. The device with the hydrogen filling and air leakage detection function according to claim 1, wherein a sealing strip (13) is arranged on the outer wall of the top of the detection gas box (2), and the sealing strip (13) is tightly attached to the inner wall of the sealing top cover (1).
3. The device with the hydrogen filling and gas leakage detection function according to claim 1, wherein the sealing top cover (1) is of a cylindrical structure, an opening is formed in the top end of the sealing top cover (1), and the detection gas tank (2) is arranged in the sealing top cover (1) through the opening.
4. The device with the hydrogen filling and leakage detection function according to claim 1, wherein the first barometer (9) and the gas transmission connector (10) are communicated with the inside of the seal top cover (1), the second barometer (11) is the same as the first barometer (9) in size, and the second barometer (11) is the same as the first barometer (9) in model.
5. The device with the hydrogen filling and air leakage detection function according to claim 1, wherein the air guide pipeline (8) is communicated with the inside of the detection air box (2), the upper end of the air guide pipeline (8) is fixedly connected with the air leakage valve installation block (5), the air leakage valve installation block (5) is provided with an upper through hole and a lower through hole, the air leakage valve is communicated with the air guide pipeline (8) through the hole on the air leakage valve installation block (5), and the air leakage valve installation block (5) is in sealing connection with the air guide pipeline (8).
6. The device with the hydrogen filling and leakage detection function according to claim 1, wherein the second barometer (11) and the exhaust valve (12) are communicated with the inside of the detection gas tank (2).
7. The device with the hydrogen filling and leakage detecting function according to claim 1, wherein the exhaust valve (12) is provided with a rotary switch structure, the rotary switch structure is made of wear-resistant materials, and the exhaust valve (12) further comprises a sealing gasket connected with the rotary switch.
8. The method for using the device with the hydrogen filling and gas leakage detection function is characterized by adopting the device with the hydrogen filling and gas leakage detection function as claimed in any one of claims 1-7, and comprises the following steps: step1, initializing a system and installing a basic device; step2, installing a barometer, an exhaust valve (12) and an air delivery joint (10) to perform airtight test and performance adjustment; step3, after the debugging is qualified, assembling the device with a hydrogenation pipeline, and synchronously detecting air pressure and giving a leakage alarm when hydrogen is filled.
9. The method for using a device with hydrogen filling and gas leakage detection function according to claim 8, wherein the Step1 base device is installed as follows: After each part of the device with the hydrogen filling and air leakage detection function is qualified, firstly inserting the detection air box (2) into a hole of the connection mounting plate (3) to be fixed, then installing an air duct (8) on the top of the detection air box (2), sequentially installing an air leakage valve installation block (5), an air leakage valve sealing ring (6) and an air leakage valve, sequentially installing a spring (4) and a sealing strip (13) outside the detection air box (2), and fixing the lower end of the spring (4) with the upper plane of the connection mounting plate (3); and step1.2, installing the spring (4) and the sealing strip (13) in place, covering the sealing top cover (1) on the upper part of the detection gas tank (2) after confirming the connection and fastening, ensuring that the sealing top cover (1) is closely adhered to the sealing strip (13) outside the detection gas tank (2), and fixing the upper end of the spring (4) and the lower end of the sealing top cover (1).
10. The method for using a device with hydrogen filling and gas leakage detection function according to claim 8, wherein the Step2 specifically comprises the following steps: Step2.1, after each part is confirmed to be connected and fastened, a first barometer (9) and a gas transmission joint (10) are arranged at the top of the sealing top cover (1), a second barometer (11) is arranged at the bottom of the detection gas box (2), and a vent valve (12) is arranged on the side surface of the detection gas box, so that the airtight test and the performance debugging of the device are carried out; During a step2.2, air is injected into the seal top cover (1) through the air delivery connector (10), high pressure is formed in the seal top cover (1) by the air, meanwhile, the air pressure in the seal top cover (1) is detected by the first air pressure gauge (9), then the air passes through the air release valve arranged on the air release valve mounting block (5) to enter the air guide pipeline (8) and then enter the detection air box (2), the air pressure in the detection air box (2) is detected by the second air pressure gauge (11), the air pressure value of the air release valve is obtained by increasing the air pressure value of the second air pressure gauge (11), so that the air release valve is rapidly detected, and when the air pressure value of the detection air box (2) exceeds the set limit value of the air release valve (12), the air release valve (12) is started to start exhausting; And step2.3, injecting air into the seal top cover (1) through the air transmission joint (10), forming high pressure in the seal top cover (1), enabling the air to pass through an air release valve arranged on the air release valve mounting block (5) to enter the air guide pipeline (8), enabling the seal top cover (1) to slide outwards when the air passes through the air release valve, enabling a spring (4) arranged at the lower end of the seal top cover (1) to stretch under the stress, expanding the inner space of the seal top cover (1), reducing the air density, reducing the air pressure of the seal top cover (1), detecting that the air in the air box (2) flows to the seal top cover (1) through the air release valve, and starting the air release valve (12) to release the air when the pressure of the whole space exceeds the set value of the air release valve (12), so as to reduce the air pressure of the seal top cover (1) and the detection air box (2).
11. The method for using a device with hydrogen filling and gas leakage detection function according to claim 8, wherein the Step3 specifically comprises the following steps: After the airtight test and performance debugging of the device are qualified, an air delivery connector (10) is installed and fixed on a sealing cover at the joint of a connecting pipe and an air charging pipe of a hydrogenation machine, the air delivery connector (10) is communicated with a gas phase space in the sealing cover, when hydrogen is charged, leaked hydrogen is arranged at the joint and enters a sealing top cover (1) through the air delivery connector (10), high pressure is formed in the sealing top cover (1) by the hydrogen, meanwhile, the air pressure in the sealing top cover (1) is detected by a first air pressure meter (9), then the hydrogen enters a hydrogen air guide pipeline (8) through an air release valve installed on an air release valve installation block (5), then enters the inside of a detection air box (2), the air pressure in the detection air box (2) is detected through a second air pressure meter (11), and staff can find that the hydrogen is charged and leaked through the numerical value changes of the first air pressure meter (9) and the second air pressure meter (11); The hydrogen enters the seal top cover (1) through the gas transmission connector (10), high pressure is formed in the seal top cover (1) by the hydrogen, the hydrogen passes through the air release valve arranged on the air release valve installation block (5) and enters the hydrogen gas guide pipeline (8), the seal top cover (1) is stressed to slide outwards, the spring (4) arranged at the lower end of the seal top cover (1) is stressed to stretch, the inner space of the seal top cover (1) is enlarged, the hydrogen density is reduced, the hydrogen pressure in the seal top cover (1) is reduced, the gas in the gas box (2) is detected to flow to the seal top cover (1) through the air release valve, when the gas pressure of the seal top cover (1) and the gas box (2) is detected, the set value of the air release valve (12) is exceeded, and the air release valve (12) is started to release outwards, and the alarm is triggered at the same time.

Description

Device with hydrogen filling and gas leakage detection functions and application method thereof Technical Field The invention relates to the technical field of hydrogen filling, in particular to a device with a hydrogen filling and gas leakage detection function and a use method thereof. Background The hydrogen filling device is used in the process of filling hydrogen in the hydrogen energy automobile, and generally comprises two connecting joints which are respectively arranged on the hydrogenation machine and the hydrogen energy automobile, and when the hydrogen energy automobile needs to be filled with hydrogen, the two connecting joints are connected in an airtight manner, and the hydrogen filling machine fills hydrogen into a hydrogen storage system of a fuel cell of the hydrogen energy automobile. Because hydrogen is in the compression state in the filling process, the gas tightness when two connection joints of the hydrogen filling device need to be guaranteed, therefore, the connection joints of the existing hydrogen filling device adopt a threaded connection mode, so that the problem that the connection joints are difficult to connect exists in the filling process of hydrogen, the existing hydrogen filling device cannot detect hydrogen leakage in the air inlet filling process, the gas leakage phenomenon of the filling in the hydrogen process cannot be found in time, the problem that hydrogen leakage is wasted can not be found in time when gas leakage between the connection joints occurs, and even explosion can be caused. Therefore, there is a need for a device with a hydrogen filling and gas leakage detection function to reduce the difficulty of operation of the joint connection during hydrogen filling and to improve the safety of hydrogen filling. For example, CN116659757A discloses a leakage detection device of a hydrogen filling device, which is applied to the technical field of the hydrogen filling device and comprises a connecting pipe which is communicated with a hydrogenation machine, an inflation pipe is communicated with the connecting pipe, a detection mechanism is arranged at the joint of the connecting pipe and the inflation pipe and covers the joint of the connecting pipe and the inflation pipe, the detection mechanism comprises a sealing box which is fixed on the hydrogenation machine, the connecting pipe and the inflation pipe extend into the sealing box, a detection component is arranged on the sealing box, and the detection component rises and falls along with the volume change of gas in the sealing box. The device has the advantages that the connecting pipe and the inflation pipe are both extended into the sealing box for connection, once the phenomenon of hydrogen leakage occurs, the air pressure in the sealing box is increased, so that the detection assembly is driven to move, an operator can timely find the situation of the hydrogen leakage by observing the position of the detection assembly, the connecting pipe and the inflation pipe are sleeved in the detection box, the installation and the disassembly are inconvenient, the leakage is difficult to detect in the hydrogen filling process, the treatment measure and the alarm measure of the excessive leakage pressure are not available, and the timely early warning, the protection and the treatment of the hydrogen leakage state cannot be really realized. Therefore, it is necessary to improve the prior art, and a leakage detection device of the hydrogen injector is designed, which has a simple structure, is convenient to install and detach, and can early warn, protect and treat hydrogen leakage in time. Disclosure of Invention The invention aims to solve the technical problems that the device with the function of detecting the filling and discharging of hydrogen and the use method thereof are provided, the problems that the existing detection device is inconvenient to install and disassemble, the leakage condition occurs, and the hydrogen filling process cannot be detected in real time are solved, and the rapid detection of the leakage gas in the filling process, the pressure overrun exhaust and the early warning are realized through the rising of the pressure gauge value after the rising of the air pressure value in the device. In order to solve the technical problems, the device with the hydrogen filling and air leakage detection function comprises a connecting mounting plate, wherein a hole is formed in the middle of the connecting mounting plate, a detection air box is arranged in the hole, a sealing top cover is arranged at the top end of the detection air box, a spring is sleeved on the outer wall of the upper part of the connecting mounting plate, the top end of the spring is fixedly connected with the lower end of the sealing top cover, a first air pressure gauge and an air transmission connector are arranged at the top end of the sealing top cover, an air leakage valve mounting block is arranged at the top of the detection