CN115717973A - Batch airtightness test device and method for 70MPa hydrogen storage cylinders - Google Patents
Batch airtightness test device and method for 70MPa hydrogen storage cylinders Download PDFInfo
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Abstract
The invention discloses a batch airtightness test device for 70MPa hydrogen storage cylinders, which comprises a low-pressure storage tank, wherein an outlet of the low-pressure storage tank is connected with an inlet of a liquid pump, an outlet of the liquid pump is connected with an inlet of the low-pressure storage tank, an inlet of a medium-pressure storage tank and an inlet of a high-pressure storage tank, an outlet of the medium-pressure storage tank is connected with an inlet of an air inlet manifold, a medium-pressure safety valve, a high-pressure check valve and a third high-pressure electromagnetic valve are sequentially arranged on a fifth pipeline along the air inlet direction, an outlet of the high-pressure storage tank is connected with an inlet of the air inlet manifold, a fifth high-pressure electromagnetic valve is arranged on the air inlet manifold, an outlet of the air inlet manifold is simultaneously connected with inlets of a plurality of air inlet branch pipes, the air inlet branch pipes are connected in parallel with the air inlet manifold, a sixth high-pressure electromagnetic valve is arranged on each air inlet branch pipe, a high-pressure hose is connected with a high-pressure cylinder opening valve detachably arranged at an outlet of each high-pressure hose. The invention has the advantage of being capable of carrying out batch rapid air tightness tests on the gas cylinders.
Description
Technical Field
The invention relates to the technical field of 70MPa hydrogen storage cylinder airtightness tests, in particular to a batch airtightness test device and method for 70MPa hydrogen storage cylinders.
Background
The vehicle-mounted hydrogen supply system is a key part of a hydrogen fuel cell automobile. The vehicle-mounted hydrogen supply system is formed by arranging and assembling one or more hydrogen storage cylinders on a fixed frame through pipelines. The air tightness test is an important means for detecting the quality of the hydrogen storage cylinder. At present, the air tightness test method aiming at the 70MPa hydrogen storage cylinder is as follows: the method comprises the steps of firstly, slowly boosting the gas cylinder to be detected to the required airtight pressure by using an air drive boosting device, and then carrying out airtight test detection on the gas cylinder to be detected according to the related requirements of GB/T35544. The existing 70MPa hydrogen storage cylinder gas tightness test method has the following defects: (1) The gas drive pressurizing device is used for pressurizing the 70MPa hydrogen storage cylinder, so that the pressurizing is slow, the unit time consumption is long, the requirement of batch pressurizing in the subsequent production process cannot be met, and the personnel, equipment and production turnover are greatly wasted; (2) Because personnel can not leave during the operation that steps up, and step up the operation unit and spend time longer, lead to people, press long-time contact, buried hidden danger for safety in production.
Disclosure of Invention
The invention aims to provide a 70MPa hydrogen storage cylinder batch air tightness test device which is simple to operate, high in safety and capable of rapidly pressurizing cylinders in batches.
In order to realize the purpose, the invention adopts the following technical scheme: the utility model provides a 70MPa hydrogen storage cylinder is gas tightness test device in batches which characterized in that: comprises a low-pressure storage tank, a medium-pressure storage tank, a high-pressure storage tank, a liquid pump and an electric main controller;
the outlet of the low-pressure storage tank is connected with the inlet of a liquid pump through a first pipeline with a first low-pressure electromagnetic valve, the outlet of the liquid pump is connected with the inlet of the low-pressure storage tank through a second pipeline with a second low-pressure electromagnetic valve, the outlet of the liquid pump is simultaneously connected with the inlet of a medium-pressure storage tank through a third pipeline with a first high-pressure electromagnetic valve, the outlet of the liquid pump is simultaneously connected with the inlet of the high-pressure storage tank through a fourth pipeline with a second high-pressure electromagnetic valve, the outlet of the medium-pressure storage tank is connected with the inlet of an air inlet main pipe through a fifth pipeline, a medium-pressure safety valve, a high-pressure check valve and a third high-pressure electromagnetic valve are sequentially arranged on the fifth pipeline along the air inlet direction, the outlet of the high-pressure storage tank is connected with the inlet of an air inlet main pipe through a sixth pipeline with a fourth high-pressure electromagnetic valve, a fifth high-pressure electromagnetic valve is arranged on the air inlet main pipe, the outlet of the air inlet main pipe is simultaneously connected with the inlets of a plurality of air inlet branch pipes, each air inlet branch pipe is connected with the air inlet pipe in parallel connection with the air inlet main pipe, a sixth high-pressure electromagnetic valve is arranged on each air inlet branch pipe, a high-pressure hose, and a high-pressure hydrogen storage cylinder detachably connected with the outlet of a high-pressure cylinder to be tested;
the liquid pump is provided with a pump body remote control sensor and a first pressure sensor for detecting the outlet pressure of the liquid pump, the medium-pressure storage tank is provided with a second pressure sensor for detecting the tank pressure of the medium-pressure storage tank, the high-pressure storage tank is provided with a third pressure sensor for detecting the tank pressure of the high-pressure storage tank, the air inlet main pipe is provided with a fourth pressure sensor for detecting the pressure of the air inlet main pipe, all electromagnetic valves, all the pressure sensors and the remote control sensor are simultaneously and electrically connected with an electric appliance master control, so that the electric appliance master control can receive the feedback information of each pressure sensor in real time, control the action of each electromagnetic valve and control the action of the liquid pump through the remote control sensor.
Further, the device for the batch airtightness test of the 70MPa hydrogen storage cylinder comprises: the explosion-proof device comprises an explosion-proof wall body, wherein the explosion-proof wall body is enclosed into an explosion-proof area, a low-pressure storage tank, a medium-pressure storage tank, a high-pressure storage tank, an electric master control, a liquid pump, a first pipeline with a first low-pressure electromagnetic valve, a second pipeline with a second low-pressure electromagnetic valve, a third pipeline with a first high-pressure electromagnetic valve, a fourth pipeline with a second high-pressure electromagnetic valve, a fifth pipeline with a medium-pressure safety valve, a high-pressure check valve and a third high-pressure electromagnetic valve, a sixth pipeline with a fourth high-pressure electromagnetic valve, a pump body remote control sensor, a first pressure sensor, a second pressure sensor and a third pressure sensor are all located outside the explosion-proof area, and an air inlet main pipe with a fifth high-pressure electromagnetic valve and a fourth pressure sensor, all air inlet branch pipes with a sixth high-pressure electromagnetic valve, all high-pressure hoses, all high-pressure bottle mouth valves and all hydrogen storage bottles to be detected are all located inside the explosion-proof area.
Further, the device for the batch airtightness test of the 70MPa hydrogen storage cylinder comprises: the first diffusion pipeline is connected with the first pipeline, the second pipeline, the third pipeline and the fourth pipeline simultaneously.
Further, aforementioned 70MPa hydrogen storage cylinder batch airtightness test device, wherein: the device comprises a second main diffusing pipeline, and each air inlet branch pipe is connected with the second main diffusing pipeline through a second sub diffusing pipeline with a seventh high-pressure electromagnetic valve.
The second purpose of the invention is to provide a 70MPa hydrogen storage cylinder batch airtightness test method which is simple to operate and high in safety and can be used for batch detection of cylinders.
In order to realize the purpose, the invention adopts the following technical scheme: a70 MPa hydrogen storage cylinder batch air tightness test method comprises the following specific steps:
step (1): firstly, mounting a high-pressure cylinder mouth valve at the mouth of each gas cylinder to be tested, then transferring each gas cylinder to be tested into an explosion-proof area surrounded by an explosion-proof wall body, and connecting each gas cylinder to be tested with a high-pressure hose of one path of gas inlet branch pipe through the high-pressure cylinder mouth valve;
step (2): the electric master controller opens the first low-pressure electromagnetic valve and the second low-pressure electromagnetic valve, and starts the liquid pump, so that liquid nitrogen in the low-pressure storage tank continuously flows into the liquid pump through the first pipeline and then flows back into the low-pressure storage tank through the second pipeline until the liquid pump reaches a temperature set value, and precooling of the liquid pump is completed;
and (3): after precooling is finished, the electric main controller opens the first high-pressure electromagnetic valve to ensure that the liquid pump vaporizes and pressurizes the liquid nitrogen in the low-pressure storage tank and then smoothly fills the liquid nitrogen into the medium-pressure storage tank through the third pipeline until the tank pressure in the medium-pressure storage tank reaches 38-46 MPa;
and (4): the electric main controller opens the second high-pressure electromagnetic valve and closes the first high-pressure electromagnetic valve, the liquid pump is enabled to continuously pressurize, liquid nitrogen in the low-pressure storage tank is stably filled into the high-pressure storage tank through the fourth pipeline after being vaporized and pressurized, and the liquid pump stops acting and closes the second high-pressure electromagnetic valve until the tank pressure in the high-pressure storage tank reaches 89-95 MPa;
and (5): the electrical equipment master controller firstly opens a third high-pressure electromagnetic valve, opens a fifth high-pressure electromagnetic valve after 2-10 s, then opens a sixth high-pressure electromagnetic valve on each air inlet branch pipe, and stably fills medium-pressure nitrogen in the medium-pressure storage tank into each air bottle to be tested through a fifth pipeline, an air inlet main pipe, each air inlet branch pipe and each high-pressure hose in sequence until the pressure in each air bottle to be tested reaches 39-41 MPa, and then closes the third high-pressure electromagnetic valve, the fifth high-pressure electromagnetic valve and each sixth high-pressure electromagnetic valve;
and (6): the electric main controller firstly opens a fourth high-pressure electromagnetic valve, opens a fifth high-pressure electromagnetic valve after 2-10 s, then opens a sixth high-pressure electromagnetic valve on each air inlet branch pipe, and stably fills high-pressure nitrogen in the high-pressure storage tank into each air bottle to be tested through a sixth pipeline, an air inlet main pipe, each air inlet branch pipe and each high-pressure hose in sequence until the pressure in each air bottle to be tested reaches 87.5-88.5 MPa, and then closes the fourth high-pressure electromagnetic valve, the fifth high-pressure electromagnetic valve and each sixth high-pressure electromagnetic valve;
and (7): during the operations from the step (5) to the step (6), when the tank pressure of the medium-pressure storage tank is less than or equal to 35MPa, skipping to execute the step (3), and when the tank pressure of the high-pressure storage tank is less than or equal to 80MPa, skipping to execute the step (4);
and (8): carrying out air tightness test detection on the gas cylinder to be detected according to related requirements of GB/T35544;
and (9): after the detection is finished, the electric general controller closes the fourth high-pressure electromagnetic valve, the fifth high-pressure electromagnetic valve and each sixth high-pressure electromagnetic valve in sequence; after 4-8 s, sequentially opening the seventh high-pressure electromagnetic valve, the sixth high-pressure electromagnetic valve and the fifth high-pressure electromagnetic valve until the pressure of the pipeline of the air inlet main pipe and the air inlet branch pipes is relieved to zero, and then closing the sixth high-pressure electromagnetic valve and the fifth high-pressure electromagnetic valve; then opening each high-pressure cylinder mouth valve until the pressure of each gas cylinder to be tested is released to zero, and then closing each seventh high-pressure electromagnetic valve;
step (10): and the electric equipment master controller sequentially opens the first valve and closes the first low-pressure electromagnetic valve and the second low-pressure electromagnetic valve until the pipeline pressure of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline is released to zero, then closes each high-pressure bottle mouth valve, separates each high-pressure bottle mouth valve from the corresponding high-pressure hose, and moves each tested gas bottle out of an explosion-proof area defined by the explosion-proof wall body.
Through the implementation of the technical scheme, the invention has the beneficial effects that: (1) The operation is simple, the operation is convenient, the worker can realize the stable and rapid pressurization operation of the gas cylinder to be tested outside the explosion-proof wall body, the pressure and the human are divided into areas during the pressurization operation, the pressure and the human do not need to be contacted for a long time, and the safety performance is high; (2) By adopting two-stage pressurization, the 70MPa hydrogen storage cylinders can be stably and rapidly pressurized in batches under the condition of ensuring safety, unit time consumption is short, rapid batch air tightness tests of the 70MPa hydrogen storage cylinders are realized, test efficiency is improved, turnover efficiency is improved, and invalid loss of personnel and time is reduced; (3) The device can realize electrical intelligent linkage, and can perform more effective operation while reducing misoperation; (4) The device is not only suitable for the batch air tightness test of the 70MPa hydrogen storage cylinder, but also suitable for the batch air tightness test of the hydrogen storage cylinder within 70MPa and 450L, and has wide application range.
Drawings
FIG. 1 is a schematic view of the structural principle of the device for the batch gas tightness test of the 70MPa hydrogen storage cylinders.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in figure 1, the 70MPa hydrogen storage cylinder batch airtightness test device comprises a low-pressure storage tank 1, a medium-pressure storage tank 2, a high-pressure storage tank 3, a liquid pump 4 and an electric device master control 5;
the outlet of the low-pressure storage tank 1 is connected with the inlet of a liquid pump 4 through a first pipeline 7 with a first low-pressure electromagnetic valve 6, the outlet of the liquid pump 4 is connected with the inlet of the low-pressure storage tank 1 through a second pipeline 9 with a second low-pressure electromagnetic valve 8, the outlet of the liquid pump 4 is simultaneously connected with the inlet of a medium-pressure storage tank through a third pipeline 11 with a first high-pressure electromagnetic valve 10, the outlet of the liquid pump 4 is simultaneously connected with the inlet of a high-pressure storage tank 3 through a fourth pipeline 13 with a second high-pressure electromagnetic valve 12, the outlet of the medium-pressure storage tank 2 is connected with the inlet of an air inlet main 15 through a fifth pipeline 14, a medium-pressure safety valve 16, a high-pressure check valve 17 and a third high-pressure electromagnetic valve 18 are sequentially arranged on the fifth pipeline 14 along the air inlet direction, the outlet of the high-pressure storage tank 3 is connected with the inlet of the air inlet main 15 through a sixth pipeline 20 with a fourth high-pressure electromagnetic valve 19, a fifth high-pressure electromagnetic valve 21 is arranged on the air inlet main 15, the outlet of the air inlet main 15 is simultaneously connected with the inlets of a plurality of air inlet branch pipes 22, each air inlet pipe 24 is detachably connected with a high-pressure hose 24, and each high-pressure hose 24 is detachably connected with a high-pressure hose 24 to be tested;
a pump body remote control sensor 27 and a first pressure sensor 28 for detecting the outlet pressure of the liquid pump are arranged on the liquid pump 4, a second pressure sensor 29 for detecting the tank pressure of the medium-pressure storage tank is arranged on the medium-pressure storage tank 2, a third pressure sensor 30 for detecting the tank pressure of the high-pressure storage tank is arranged on the high-pressure storage tank 3, a fourth pressure sensor 31 for detecting the pressure of an air inlet main pipe is arranged on the air inlet main pipe 15, and all the electromagnetic valves, all the pressure sensors and the remote control sensor are simultaneously and electrically connected with the electric equipment main control 5, so that the electric equipment main control 5 can receive the feedback information of all the pressure sensors in real time, control the actions of all the electromagnetic valves and control the actions of the liquid pump 4 through the remote control sensor 27;
in the embodiment, the explosion-proof wall 32 is further included, the explosion-proof wall 32 encloses an explosion-proof area 33, the low-pressure storage tank 1, the medium-pressure storage tank 2, the high-pressure storage tank 3, the electrical installation master controller 5, the liquid pump 4, the first pipeline 7 with the first low-pressure electromagnetic valve 6, the second pipeline 9 with the second low-pressure electromagnetic valve 8, the third pipeline 11 with the first high-pressure electromagnetic valve 10, the fourth pipeline 13 with the second high-pressure electromagnetic valve 12, the fifth pipeline 14 with the medium-pressure safety valve 16, the high-pressure check valve 17 and the third high-pressure electromagnetic valve 18, the sixth pipeline 20 with the fourth high-pressure electromagnetic valve 19, the pump body remote control sensor 27, the first pressure sensor 28, the second pressure sensor 29 and the third pressure sensor 30 are all located outside the explosion-proof area 33, the air inlet main 15 with the fifth high-pressure electromagnetic valve 21 and the fourth pressure sensor 31, all the air inlet branch pipes 22 with the sixth high-pressure electromagnetic valve 23, all the high-pressure hoses 24, all the high-pressure bottle-mouth valves 26 and all the hydrogen cylinders 25 to be detected are all located inside the explosion-proof area 33;
in this embodiment, the system further includes a first bleeding pipeline 35 with a first valve 34, and the first bleeding pipeline 35 is connected to the first pipeline 7, the second pipeline 9, the third pipeline 11, and the fourth pipeline 13 at the same time; and the device also comprises a second main diffusing pipeline 37, and each air inlet branch pipe 22 is respectively connected with the second main diffusing pipeline 37 through a second branch diffusing pipeline 39 with a seventh high-pressure electromagnetic valve 38.
A70 MPa hydrogen storage cylinder batch air tightness test method comprises the following specific steps:
step (1): firstly, installing a high-pressure cylinder port valve 26 at the cylinder port of each gas cylinder 25 to be tested, then transferring each gas cylinder 25 to be tested into an explosion-proof area 33 surrounded by an explosion-proof wall 32, and connecting each gas cylinder 25 to be tested with a high-pressure hose 24 of one path of air inlet branch pipe 22 through the high-pressure cylinder port valve 26;
step (2): the electric general controller 5 opens the first low-pressure electromagnetic valve 6 and the second low-pressure electromagnetic valve 8, starts the liquid pump 4, enables liquid nitrogen in the low-pressure storage tank 1 to continuously flow into the liquid pump 4 through the first pipeline 7, and then flows back into the low-pressure storage tank 1 through the second pipeline 9 until the liquid pump 4 reaches a set temperature value, and precools the liquid pump 4;
and (3): after precooling is finished, the master controller 5 is electrically arranged to open the first high-pressure electromagnetic valve 10, so that the liquid pump 4 vaporizes and pressurizes liquid nitrogen in the low-pressure storage tank 1 and then stably fills the liquid nitrogen into the medium-pressure storage tank 2 through the third pipeline 11 until the tank pressure in the medium-pressure storage tank 2 reaches 38-46 MPa;
and (4): the electric main controller 5 opens the second high-pressure electromagnetic valve 12 and closes the first high-pressure electromagnetic valve 10, continuously boosts the pressure of the liquid pump 4, vaporizes and boosts the liquid nitrogen in the low-pressure storage tank 1, and then stably fills the liquid nitrogen into the high-pressure storage tank 3 through the fourth pipeline 13 until the tank pressure in the high-pressure storage tank 3 reaches 89-95 MPa, stops the action of the liquid pump 4 and closes the second high-pressure electromagnetic valve 12;
and (5): the electrical equipment master control 5 firstly opens the third high-pressure electromagnetic valve 18, opens the fifth high-pressure electromagnetic valve 21 after 2-10 s, then opens the sixth high-pressure electromagnetic valve 23 on each air inlet branch pipe 22, and stably fills the medium-pressure nitrogen in the medium-pressure storage tank 2 into each to-be-tested air bottle 25 through the fifth pipeline 14, the air inlet header pipe 15, each air inlet branch pipe 22 and each high-pressure hose 24 in sequence until the pressure in each to-be-tested air bottle 25 reaches 39-41 MPa, and then closes the third high-pressure electromagnetic valve 18, the fifth high-pressure electromagnetic valve 21 and each sixth high-pressure electromagnetic valve 23;
and (6): the electric main controller 5 firstly opens the fourth high-pressure electromagnetic valve 19, opens the fifth high-pressure electromagnetic valve 21 after 2-10 s, then opens the sixth high-pressure electromagnetic valve 23 on each air inlet branch pipe 22, and smoothly fills the high-pressure nitrogen in the high-pressure storage tank 3 into each air bottle 25 to be tested through the sixth pipeline 20, the air inlet main pipe 15, each air inlet branch pipe 22 and each high-pressure hose 24 in sequence until the pressure in each air bottle 25 to be tested reaches 87.5-88.5 MPa, and then closes the fourth high-pressure electromagnetic valve 19, the fifth high-pressure electromagnetic valve 21 and each sixth high-pressure electromagnetic valve 23;
and (7): during the operation from the step (5) to the step (6), when the tank pressure of the medium-pressure storage tank 2 is less than or equal to 35MPa, skipping to execute the step (3), and when the tank pressure of the high-pressure storage tank 3 is less than or equal to 80MPa, skipping to execute the step (4);
and (8): carrying out air tightness test detection on the gas cylinder to be detected according to the related requirements of GB/T35544;
and (9): after the detection is finished, the electric general control 5 closes the fourth high-pressure electromagnetic valve 19, the fifth high-pressure electromagnetic valve 21 and the sixth high-pressure electromagnetic valves 23 in sequence; after 4-8 s, sequentially opening the seventh high-pressure electromagnetic valve 38, the sixth high-pressure electromagnetic valve 23 and the fifth high-pressure electromagnetic valve 21 until the pipeline pressure of the air inlet main pipe 15 and the air inlet branch pipes 22 is released to zero, and closing the sixth high-pressure electromagnetic valve 23 and the fifth high-pressure electromagnetic valve 21; then, opening each high-pressure cylinder mouth valve 26 until the pressure of each gas cylinder 25 to be tested is released to zero, and then closing each seventh high-pressure electromagnetic valve 38;
step (10): the electric installation master controller 5 sequentially opens the first valve 34 and closes the first low-pressure electromagnetic valve 6 and the second low-pressure electromagnetic valve 8 until the pipeline pressure of the first pipeline 7, the second pipeline 9, the third pipeline 11 and the fourth pipeline 13 is relieved to zero, then closes each high-pressure bottle mouth valve 26, separates each high-pressure bottle mouth valve 26 from the corresponding high-pressure hose 24, and then moves each measured gas bottle 25 out of an explosion-proof area 33 defined by the explosion-proof wall 32.
The invention has the advantages that: (1) The operation is simple, the operation is convenient, the worker can realize the stable and rapid pressurization operation of the gas cylinder to be tested outside the explosion-proof wall body, the pressure and the human are divided into areas during the pressurization operation, the pressure and the human do not need to be contacted for a long time, and the safety performance is high; (2) By adopting two-stage pressurization, the 70MPa hydrogen storage cylinders can be stably and rapidly pressurized in batches under the condition of ensuring safety, unit time consumption is short, rapid batch air tightness tests of the 70MPa hydrogen storage cylinders are realized, test efficiency is improved, turnover efficiency is improved, and invalid loss of personnel and time is reduced; (3) The device can realize electrical intelligent linkage, reduce misoperation and simultaneously carry out more effective operation; (4) The device is not only suitable for the batch air tightness test of the 70MPa hydrogen storage cylinder, but also suitable for the batch air tightness test of the hydrogen storage cylinder within 70MPa and 450L, and has wide application range.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, but any modifications or equivalent variations made in accordance with the technical spirit of the present invention are within the scope of the present invention as claimed.
Claims (5)
1. The utility model provides a 70MPa hydrogen storage cylinder is gas tightness test device in batches which characterized in that: comprises a low-pressure storage tank, a medium-pressure storage tank, a high-pressure storage tank, a liquid pump and an electric control;
the outlet of the low-pressure storage tank is connected with the inlet of a liquid pump through a first pipeline with a first low-pressure electromagnetic valve, the outlet of the liquid pump is connected with the inlet of the low-pressure storage tank through a second pipeline with a second low-pressure electromagnetic valve, the outlet of the liquid pump is simultaneously connected with the inlet of a medium-pressure storage tank through a third pipeline with a first high-pressure electromagnetic valve, the outlet of the liquid pump is simultaneously connected with the inlet of the high-pressure storage tank through a fourth pipeline with a second high-pressure electromagnetic valve, the outlet of the medium-pressure storage tank is connected with the inlet of an air inlet main pipe through a fifth pipeline, a medium-pressure safety valve, a high-pressure check valve and a third high-pressure electromagnetic valve are sequentially arranged on the fifth pipeline along the air inlet direction, the outlet of the high-pressure storage tank is connected with the inlet of an air inlet main pipe through a sixth pipeline with a fourth high-pressure electromagnetic valve, a fifth high-pressure electromagnetic valve is arranged on the air inlet main pipe, the outlet of the air inlet main pipe is simultaneously connected with the inlets of a plurality of air inlet branch pipes, each air inlet branch pipe is connected with the air inlet pipe in parallel connection with the air inlet main pipe, a sixth high-pressure electromagnetic valve is arranged on each air inlet branch pipe, a high-pressure hose, and a high-pressure hydrogen storage cylinder detachably connected with the outlet of a high-pressure cylinder to be tested;
be provided with pump body remote control sensor on the liquor pump and be used for detecting the first pressure sensor of liquor pump outlet pressure, be provided with the second pressure sensor that is used for detecting the medium-pressure storage tank jar and presses on the medium-pressure storage tank, be provided with the third pressure sensor that is used for detecting the high-pressure storage tank jar and presses on the high-pressure storage tank, be provided with the fourth pressure sensor that is used for detecting air intake manifold pressure on air intake manifold, all solenoid valves, all pressure sensors and remote control sensor are connected with the electricity is established always to control the electricity simultaneously and are connected, so that the electricity is established always can receive each pressure sensor feedback information in real time, control each solenoid valve action, and can control the action of liquor pump through remote control sensor.
2. The device for the batch airtightness test of the 70MPa hydrogen storage cylinders according to claim 1, is characterized in that: the explosion-proof device comprises an explosion-proof wall body, wherein the explosion-proof wall body is enclosed into an explosion-proof area, a low-pressure storage tank, a medium-pressure storage tank, a high-pressure storage tank, an electric master control, a liquid pump, a first pipeline with a first low-pressure electromagnetic valve, a second pipeline with a second low-pressure electromagnetic valve, a third pipeline with a first high-pressure electromagnetic valve, a fourth pipeline with a second high-pressure electromagnetic valve, a fifth pipeline with a medium-pressure safety valve, a high-pressure check valve and a third high-pressure electromagnetic valve, a sixth pipeline with a fourth high-pressure electromagnetic valve, a pump body remote control sensor, a first pressure sensor, a second pressure sensor and a third pressure sensor are all located outside the explosion-proof area, and an air inlet main pipe with a fifth high-pressure electromagnetic valve and a fourth pressure sensor, all air inlet branch pipes with a sixth high-pressure electromagnetic valve, all high-pressure hoses, all high-pressure bottle mouth valves and all hydrogen storage bottles to be detected are all located inside the explosion-proof area.
3. The device for the batch airtightness test of the 70MPa hydrogen storage cylinder according to claim 1 or 2, is characterized in that: the first diffusion pipeline is connected with the first pipeline, the second pipeline, the third pipeline and the fourth pipeline simultaneously.
4. The device for the batch airtightness test of the 70MPa hydrogen storage cylinders according to claim 3, is characterized in that: the system comprises a second diffusing main pipeline, wherein each air inlet branch pipe is connected with the second diffusing main pipeline through a second diffusing branch pipeline with a seventh high-pressure electromagnetic valve.
5. A70 MPa hydrogen storage cylinder batch air tightness test method is characterized by comprising the following steps: the device for the batch airtightness test of the 70MPa hydrogen storage cylinder as claimed in any one of claims 1 to 4 comprises the following steps:
step (1): firstly, mounting a high-pressure cylinder mouth valve at the mouth of each gas cylinder to be tested, then transferring each gas cylinder to be tested into an explosion-proof area surrounded by an explosion-proof wall body, and connecting each gas cylinder to be tested with a high-pressure hose of one path of gas inlet branch pipe through the high-pressure cylinder mouth valve;
step (2): the electric master controller opens the first low-pressure electromagnetic valve and the second low-pressure electromagnetic valve, and starts the liquid pump, so that liquid nitrogen in the low-pressure storage tank continuously flows into the liquid pump through the first pipeline and then flows back into the low-pressure storage tank through the second pipeline until the liquid pump reaches a temperature set value, and precooling of the liquid pump is completed;
and (3): after precooling is finished, the electric main controller opens the first high-pressure electromagnetic valve to ensure that the liquid pump vaporizes and pressurizes the liquid nitrogen in the low-pressure storage tank and then smoothly fills the liquid nitrogen into the medium-pressure storage tank through the third pipeline until the tank pressure in the medium-pressure storage tank reaches 38-46 MPa;
and (4): the electric main controller opens the second high-pressure electromagnetic valve and closes the first high-pressure electromagnetic valve, the liquid pump is enabled to continuously pressurize, liquid nitrogen in the low-pressure storage tank is stably filled into the high-pressure storage tank through the fourth pipeline after being vaporized and pressurized, and the liquid pump stops acting and closes the second high-pressure electromagnetic valve until the tank pressure in the high-pressure storage tank reaches 89-95 MPa;
and (5): the electrical equipment master controller firstly opens a third high-pressure electromagnetic valve, opens a fifth high-pressure electromagnetic valve after 2-10 s, then opens a sixth high-pressure electromagnetic valve on each air inlet branch pipe, and stably fills medium-pressure nitrogen in the medium-pressure storage tank into each air bottle to be tested through a fifth pipeline, an air inlet main pipe, each air inlet branch pipe and each high-pressure hose in sequence until the pressure in each air bottle to be tested reaches 39-41 MPa, and then closes the third high-pressure electromagnetic valve, the fifth high-pressure electromagnetic valve and each sixth high-pressure electromagnetic valve;
and (6): the electric main control unit opens the fourth high-pressure electromagnetic valve at intervals of 2-10 s, opens the fifth high-pressure electromagnetic valve, opens the sixth high-pressure electromagnetic valve on each air inlet branch pipe, and stably fills high-pressure nitrogen in the high-pressure storage tank into each to-be-detected air bottle through the sixth pipeline, the air inlet main pipe, each air inlet branch pipe and each high-pressure hose in sequence until the pressure in each to-be-detected air bottle reaches 87.5-88.5 MPa, and closes the fourth high-pressure electromagnetic valve, the fifth high-pressure electromagnetic valve and each sixth high-pressure electromagnetic valve;
and (7): during the operations from the step (5) to the step (6), when the tank pressure of the medium-pressure storage tank is less than or equal to 35MPa, skipping to execute the step (3), and when the tank pressure of the high-pressure storage tank is less than or equal to 80MPa, skipping to execute the step (4);
and (8): carrying out air tightness test detection on the gas cylinder to be detected according to the related requirements of GB/T35544;
and (9): after the detection is finished, the electric general controller closes the fourth high-pressure electromagnetic valve, the fifth high-pressure electromagnetic valve and each sixth high-pressure electromagnetic valve in sequence; after 4-8 s, sequentially opening the seventh high-pressure electromagnetic valve, the sixth high-pressure electromagnetic valve and the fifth high-pressure electromagnetic valve until the pressure of the pipeline of the air inlet main pipe and the air inlet branch pipes is relieved to zero, and then closing the sixth high-pressure electromagnetic valve and the fifth high-pressure electromagnetic valve; then opening each high-pressure cylinder mouth valve until the pressure of each gas cylinder to be tested is released to zero, and then closing each seventh high-pressure electromagnetic valve;
step (10): and the electric equipment master controller sequentially opens the first valve and closes the first low-pressure electromagnetic valve and the second low-pressure electromagnetic valve until the pipeline pressure of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline is released to zero, then closes each high-pressure bottle mouth valve, separates each high-pressure bottle mouth valve from the corresponding high-pressure hose, and moves each tested gas bottle out of an explosion-proof area defined by the explosion-proof wall body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211421542.7A CN115717973A (en) | 2022-11-15 | 2022-11-15 | Batch airtightness test device and method for 70MPa hydrogen storage cylinders |
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| CN202211421542.7A CN115717973A (en) | 2022-11-15 | 2022-11-15 | Batch airtightness test device and method for 70MPa hydrogen storage cylinders |
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| CN115717973A true CN115717973A (en) | 2023-02-28 |
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| CN202211421542.7A Pending CN115717973A (en) | 2022-11-15 | 2022-11-15 | Batch airtightness test device and method for 70MPa hydrogen storage cylinders |
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| Country | Link |
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| CN (1) | CN115717973A (en) |
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2022
- 2022-11-15 CN CN202211421542.7A patent/CN115717973A/en active Pending
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