A portable simplified device for hydrogen sampling

Abstract

The utility model discloses a kind of for hydrogen sampling portable simplification device, belong to hydrogen trace impurity detection technical field, including integrated shell, the integrated shell is equipped with gas source gas inlet module, pressure monitoring module, gas cylinder sampling module and gas pressure relief module, multiple groups of modules are connected through high-pressure resistant sealing pipeline between, the integrated shell side is detachably connected with backup cabin by buckle structure, the gas source gas inlet module includes the first gas receiving tube, second gas receiving tube and third gas receiving tube fixed in integrated shell left side wall;The portable simplification device for hydrogen sampling is designed by modular integration and mobile structure, can be flexibly adapted to hydrogen production plant, hydrogenation station and other multi-scene sampling needs, without separately configuring equipment, and can safely handle sampling replacement waste gas, portability is prominent, suitable for hydrogen production, hydrogen supply enterprise to complete on-site sampling operation quickly.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen trace impurity detection technology, specifically a portable simplified device for hydrogen sampling, suitable for on-site sampling of hydrogen for fuel cells in hydrogen production plants, hydrogen refueling stations and other scenarios. Background Technology

[0002] Hydrogen quality is the core guarantee for the large-scale application of hydrogen energy and fuel cell vehicles. International and domestic standards have strict requirements on the purity and impurity content of hydrogen used in fuel cells (such as the limit of sulfides and halides must reach level 10-9). As a preliminary step for trace detection, sample collection directly affects the accuracy of the test results.

[0003] Existing hydrogen sampling devices have two major problems: First, they lack versatility, requiring individual configuration based on the type of sampling site (such as hydrogen production plant pipelines, hydrogen refueling station TK17 / TK25 hydrogen refueling guns), making it difficult to flexibly switch between scenarios; second, they lack portability, with most devices lacking an integrated mobile structure, making it difficult to quickly transport them to different sampling points; and third, they pose high safety risks, as the waste hydrogen generated during multiple replacements in the sampling process is mostly directly discharged into the air, wasting resources and increasing on-site risks due to the flammable and explosive nature of hydrogen.

[0004] Therefore, it is necessary to design an integrated and portable hydrogen sampling device to solve the problems of multi-scenario adaptability, portable transportation and safe treatment of waste gas, and meet the enterprise's efficient sampling needs. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a portable and simplified device for hydrogen sampling. Through modular integration and mobile structural design, it achieves three core objectives: "multi-scenario adaptability, portable transport, and safe exhaust." The specific technical solution is as follows:

[0006] A portable simplified device for hydrogen sampling includes an integrated housing, which is equipped with a gas source receiving port module, a pressure monitoring module, a gas cylinder sampling module, and a gas pressure relief module. Multiple modules are connected by high-pressure resistant sealed pipes. A backup compartment is detachably connected to one side of the integrated housing via a snap-fit ​​structure.

[0007] The gas source receiving port module includes a first receiving pipe, a second receiving pipe, and a third receiving pipe fixed to the left side wall of the integrated housing. The first receiving pipe, the second receiving pipe, and the third receiving pipe are all connected to an air intake pipe. Each branch of the air intake pipe is equipped with a first control valve, a second control valve, and a third control valve. The first control valve, the second control valve, and the third control valve are all connected to a four-way valve.

[0008] The pressure monitoring module includes a delivery pipe, which is assembled inside an integrated housing. A pressure gauge and an output shut-off valve are sequentially installed on the delivery pipe. One end of the delivery pipe is connected to a four-way valve, and the other end of the delivery pipe is connected to a gas cylinder sampling module.

[0009] The gas cylinder sampling module includes a first sampling bottle, a second sampling bottle, and a merging inlet valve installed on the bottom wall of the integrated housing. The first sampling bottle has a first inlet valve at its right end and a first outlet valve at its left end. The second sampling bottle has a second inlet valve at its right end and a second outlet valve at its left end. A three-way valve is installed at one end of the merging inlet valve.

[0010] The gas pressure relief module includes a first discharge pipe and a second discharge pipe installed on the right end of the housing. One end of the first discharge pipe is connected to a three-way valve and a first pressure relief valve is provided on the first discharge pipe. One end of the second discharge pipe is connected to a first outlet valve and a second outlet valve, and a detachable high-pressure venting pipe is installed on the other end of the second discharge pipe. The delivery pipe is connected to the first discharge pipe through a branch pipe. The front end of both the first and second pressure relief valves is provided with a manual unloading valve. The output shut-off valve, the confluence inlet valve, and the pressure relief valve are connected through a three-way valve. A second pressure relief valve is also provided on the second discharge pipe.

[0011] The first gas receiving pipe is adapted to the TK25 hydrogen refueling gun at the hydrogen refueling station for high-flow-rate hydrogen sampling at 35MPa; the second gas receiving pipe is adapted to the TK17 hydrogen refueling gun at the hydrogen refueling station for low-flow-rate hydrogen sampling at 35MPa and 70MPa; the third gas receiving pipe is adapted to the 3 / 8 sampling pipeline at the hydrogen production plant for hydrogen sampling in non-hydrogen refueling gun scenarios.

[0012] The pressure monitoring module has a pressure range of 0-10 MPa; the pressure gauge has a range of not less than 10 MPa and an accuracy class of not less than 0.4.

[0013] The first and second sampling bottles are type IV bottles with a pressure resistance of not less than 35 MPa, and their inner walls are passivated.

[0014] The detachable connection structure between the high-pressure vent pipe and the second vent pipe is a threaded interface. When not in operation, the high-pressure vent pipe can be stored in the rear compartment.

[0015] The detection shell is fixedly installed on the top wall of the integrated housing, and a pressure adjustment knob is provided on the front of the detection shell.

[0016] Multiple sets of omnidirectional wheels are evenly installed at the four corners of the bottom of the integrated housing. The omnidirectional wheels are silent omnidirectional wheels with braking function, and the interior of the rear compartment is equipped with a sponge cushioning layer.

[0017] Beneficial effects:

[0018] This device, through modular integration and mobile structure design, can flexibly adapt to the sampling needs of various scenarios such as hydrogen production plants and hydrogen refueling stations. It does not require separate equipment configuration, can safely handle sampling and replacement waste gas, and has outstanding portability, making it suitable for hydrogen production and supply companies to quickly complete on-site sampling operations. Attached Figure Description

[0019] Figure 1 This is a plan view of the present invention.

[0020] In the diagram: B-1, Integrated shell; C-1, Rear compartment; L-1, Intake pipe; L-2, Delivery pipe; L-3, First discharge pipe; L-4, Second discharge pipe; 100, Gas source receiving port module; 200, Pressure monitoring module; 300, Gas cylinder sampling module; 400, Gas pressure relief module; 101, First receiving pipe; 102, Second receiving pipe; 103, Third receiving pipe; 201, First control valve; 202, Second control valve ; 203, Third control valve; 204, Four-way valve; 205, Pressure gauge; 301, Output shut-off valve; 302, Merging inlet valve; 303, First sampling bottle; 304, Second sampling bottle; 305, Three-way valve; 401, First pressure relief valve; 402, Second pressure relief valve; 403, High-pressure vent pipe; 303-1, First inlet valve; 303-2, First outlet valve; 304-1, Second inlet valve; 304-2, Second outlet valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 As shown, a portable simplified device for hydrogen sampling includes an integrated housing B-1, which is equipped with a gas source receiving port module 100, a pressure monitoring module 200, a gas cylinder sampling module 300, and a gas pressure relief module 400. The multiple modules are connected by high-pressure resistant sealed pipes. A backup compartment C-1 is detachably connected to one side of the integrated housing B-1 via a snap-fit ​​structure.

[0023] The gas source receiving port module 100 includes a first receiving pipe 101, a second receiving pipe 102, and a third receiving pipe 103 fixed to the left side wall of the integrated housing B-1. The first receiving pipe 101, the second receiving pipe 102, and the third receiving pipe 103 are all externally connected to an air intake pipe L-1. Each branch of the air intake pipe L-1 is respectively equipped with a first control valve 201, a second control valve 202, and a third control valve 203. All three control valves 201, 202, and 203 are connected to a four-way valve 204. The gas source receiving port module 100 includes three different... The system features a variety of gas receiving pipes to adapt to different scenarios. The first gas receiving pipe 101 corresponds to the TK25 hydrogen refueling gun in a hydrogen refueling station, meeting the requirements for high-flow-rate sampling at 35MPa. The second gas receiving pipe 102 corresponds to the TK17 hydrogen refueling gun in a hydrogen refueling station, meeting the requirements for low-flow-rate sampling at 35MPa / 70MPa. The third gas receiving pipe 103 corresponds to the 3 / 8” sampling pipeline in a hydrogen production plant, adapting to non-hydrogen refueling gun scenarios. Furthermore, the target gas source can be switched by opening and closing the first control valve 201, the second control valve 202, and the third control valve 203, effectively avoiding gas path interference in different scenarios, eliminating the need for additional equipment replacement, and improving sampling flexibility.

[0024] The pressure monitoring module 200 includes a delivery pipe L-2, which is assembled inside the integrated housing B-1. A pressure gauge 205 and an output shut-off valve 301 are sequentially installed on the delivery pipe L-2. One end of the delivery pipe L-2 is connected to a four-way valve 204, and the other end is connected to the gas cylinder sampling module 300. The pressure monitoring module 200 provides accurate pressure control. The output shut-off valve 301 can quickly cut off or open the gas path, facilitating pressure control and emergency handling during the sampling process. One end of the delivery pipe L-2 is connected to the gas source receiving port module 100, and the other end is connected to the gas cylinder sampling module 300, forming a stable pressure transmission path to ensure the accuracy of pressure monitoring and regulation.

[0025] The gas cylinder sampling module 300 includes a first sampling bottle 303, a second sampling bottle 304, and a merging inlet valve 302 installed on the bottom wall of the integrated housing B-1. The first sampling bottle 303 has a first inlet valve 303-1 at its right end and a first outlet valve 303-2 at its left end. The second sampling bottle 304 has a second inlet valve 304-1 at its right end and a second outlet valve 304-2 at its left end. A three-way valve 305 is installed at one end of the merging inlet valve 302. The gas cylinder sampling module 300 is the core of the sample storage system. Both the first sampling bottle 303 and the second sampling bottle 304 are made of materials with considerable pressure resistance. The Type IV bottle, with a pressure of 35 MPa, is lighter than traditional steel cylinders, meeting portability requirements. The inner wall of the bottle is passivated to reduce impurity adsorption and ensure the accuracy of trace detection. The bottle is fixed to the bottom wall of the integrated housing B-1 by a gas cylinder strap to prevent pressure fluctuations caused by bottle shaking during device movement, thus improving sampling stability. At the same time, the cooperation of the first inlet valve 303-1, the first outlet valve 303-2, the second inlet valve 304-1, and the second outlet valve 304-2 realizes the dual-valve control function. The dual-valve cooperation can flexibly replace residual gas in the bottle, improving sample purity.

[0026] The gas pressure relief module 400 includes a first discharge pipe L-3 and a second discharge pipe L-4 respectively installed inside the right end of the housing 1. One end of the first discharge pipe L-3 is connected to a three-way valve 305, and a first pressure relief valve 401 is provided on the first discharge pipe L-3. One end of the second discharge pipe L-4 is connected to a first outlet valve 303-2 and a second outlet valve 304-2, and a detachable high-pressure vent pipe 403 is installed on the other end of the second discharge pipe L-4. The delivery pipe L-2 is connected to the first discharge pipe L-3 through a branch pipe. The first pressure relief valve 401... Both the first and second pressure relief valves 401 and 402 are equipped with manual unloading valves at their front ends. The output shut-off valve 301, the confluence inlet valve 302 and the pressure relief valve 401 are connected through a three-way valve 305. The second discharge pipe L-4 is also equipped with a second pressure relief valve 402. The gas pressure relief module 400 provides safe venting protection. Through the first pressure relief valve 401 and the second pressure relief valve 402, in conjunction with two sets of corresponding manual unloading valves, a dual pressure relief channel of "pressure relief valve + manual unloading valve" is formed, which can quickly vent residual hydrogen in the pipeline and improve pressure relief efficiency and safety.

[0027] To supplement the above, the high-pressure exhaust pipe 403 is connected to one end of the second exhaust pipe L-4 via the detachable structure marked by the dotted line in Figure 1 of the instruction manual. When not in operation, it can be stored in the backup compartment C-1 on the back of the integrated shell B-1. When in operation, it extends to areas without ignition sources and ventilation, guiding exhaust gas to a safe area for discharge, greatly reducing on-site safety risks.

[0028] Furthermore, the first receiving pipe 101 is adapted to the TK25 hydrogen refueling gun of the hydrogen refueling station for high-flow-rate hydrogen sampling at 35MPa; the second receiving pipe 102 is adapted to the TK17 hydrogen refueling gun of the hydrogen refueling station for low-flow-rate hydrogen sampling at 35MPa and 70MPa; and the third receiving pipe 103 is adapted to the 3 / 8” sampling pipeline of the hydrogen production plant for hydrogen sampling in non-hydrogen refueling gun scenarios.

[0029] Furthermore, the pressure monitoring module 200 has a pressure range of 0-10 MPa; the pressure gauge 205 has a range of not less than 10 MPa and an accuracy class of not less than 0.4.

[0030] Furthermore, the first sampling bottle 303 and the second sampling bottle 304 are type IV bottles with a pressure resistance of not less than 35 MPa, and their inner walls are passivated.

[0031] Furthermore, the detachable connection structure between the high-level vent pipe 403 and the second vent pipe L-4 is a threaded interface, and the high-level vent pipe 403 can be stored in the rear compartment C-1 when not in operation.

[0032] Furthermore, the detection shell is fixedly installed on the inner top wall of the integrated housing B-1, and a pressure adjustment knob is provided on the front of the detection shell.

[0033] Furthermore, multiple sets of casters are evenly installed at the four corners of the bottom of the integrated shell B-1. The casters are silent casters with braking function. The interior of the rear compartment C-1 is equipped with a sponge buffer layer. The number of casters is no less than 4. The sponge buffer layer is used to protect the stored high-efficiency exhaust pipe 403.

[0034] Work steps: First, prepare for sampling by inspecting the device and confirming that all valves are closed. Perform an airtightness test to eliminate the risk of leakage in the inlet pipe L-1, delivery pipe L-2, first outlet pipe L-3, second outlet pipe L-4, and branch pipes. Open the backup compartment C-1 on the back of the integrated housing B-1 (marked with a dotted line for detachable connection), remove the high-volume vent pipe 403, and connect it to the end of the second outlet pipe L-4 via the dotted-line detachable connection. Extend the high-volume vent pipe 403 to a safe area with no ignition source and good ventilation. Then, select the appropriate receiving pipe according to the sampling site type: for high-flow sampling at a hydrogen refueling station (35MPa), select the first receiving pipe 101; for low-flow sampling at a hydrogen refueling station (35MPa or 70MPa), select the second receiving pipe 102; for sampling in a hydrogen production plant (non-hydrogen refueling gun scenario), select the third receiving pipe 103.

[0035] The second step involves replacing the residual gas, i.e., system purging. This is done by opening the control valve corresponding to the target gas receiving pipe (e.g., opening the second control valve 202 when the second gas receiving pipe 102 is selected, while keeping the control valves of the other gas receiving pipes closed), adjusting the pressure by using the output shut-off valve 301 of the pressure monitoring module 200, the first inlet valve 303-1 and the first outlet valve 303-2 of the gas cylinder sampling module 300, and the first pressure relief valve 401 and the second pressure relief valve 402 of the gas pressure relief module 400. The pressure is controlled below 10 MPa by the pressure monitoring module 200, allowing hydrogen to pass sequentially through the target gas receiving pipe and the pipe... The system includes L-1, pressure gauge 205, delivery pipe L-2, output shut-off valve 301, sampling bottle inlet valve 303-1, sampling bottles 303 / 304, sampling bottle outlet valve 303-2, first discharge pipe L-3, second discharge pipe L-4, first pressure relief valve 401, second pressure relief valve 402, and high-pressure venting pipe 403. The continuous purging time is not less than 120 seconds. If the first sampling bottle 303 or the second sampling bottle 304 is a single-necked bottle, a "fill-release" cycle mode must be used for replacement, with a cycle of not less than 10 times, to ensure that there is no residual non-sample gas in the bottle and pipeline.

[0036] The third step is sample filling. By closing the first outlet valve 303-2, the first pressure relief valve 401, and the second pressure relief valve 402, the pressure is adjusted to the target sampling pressure via the pressure monitoring module 200, which is typically set to 6.9 MPa. The reading on the pressure gauge 205 is observed. Once the reading stabilizes, the first inlet valve 303-1 is opened to begin hydrogen sample filling. During the filling process, the pressure gauge 205 is monitored in real time. If the pressure fluctuates abnormally and exceeds the 0-10 MPa adjustment range, the first inlet valve 303-1 is immediately closed. When the preset sampling volume is reached, the first inlet valve 303-1 is closed first, followed by the control valves corresponding to the target gas receiving pipe, such as the second control valve 202 and the output shut-off valve 301 of the pressure monitoring module 200.

[0037] Finally, the post-sampling cleanup work is carried out. First, the pressure is released by opening the first pressure relief valve 401, the second pressure relief valve 402, and two sets of manual unloading valves of the gas pressure relief module 400 to empty the residual hydrogen in the delivery pipe L-2, the first discharge pipe L-3, the second discharge pipe L-4, and the branch pipes. After 5 seconds, the reading of pressure gauge 205 is observed to confirm that the pressure has dropped to a safe value, that is, the value is close to atmospheric pressure. Then, all the above valves are closed, the detachable structure between the high-pressure vent pipe 403 and the second discharge pipe L-4 is disassembled, the high-pressure vent pipe 403 is stored in the backup compartment C-1, and the backup compartment C-1 is closed. Finally, the front door panel of the integrated shell B-1 is opened, the gas cylinder straps are loosened, and the first sampling bottle 303 / second sampling bottle 304 is taken out to complete the sampling operation.

[0038] In the above steps, it is important to note that during the sampling process, such as the purging and filling stages, the integrated housing B-1 must not be moved to avoid shaking of the first sampling bottle 303 / second sampling bottle 304, which could cause pressure fluctuations, affect sampling accuracy, or pose a safety risk. Furthermore, the high-pressure vent pipe 403 must extend to a safe area throughout its length, and it is strictly forbidden to discharge exhaust gas in enclosed spaces or near fire sources. Before disassembling the high-pressure vent pipe 403, it must be confirmed that there is no residual pressure in the pipeline. Additionally, the pressure gauge 205 of the pressure monitoring module 200 should be calibrated quarterly to ensure that the pressure display accuracy is not lower than 0.4 grade and the pressure adjustment range is stably maintained at 0-10 MPa. Finally, the sealing status of the inlet pipe L-1, delivery pipe L-2, first outlet pipe L-3, second outlet pipe L-4, and branch pipes should be checked regularly. If aging or damage to the seals is found, they should be replaced promptly to prevent hydrogen leakage.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A portable, simplified device for hydrogen sampling, comprising an integrated housing (B-1), characterized in that: The integrated housing (B-1) is equipped with a gas source receiving port module (100), a pressure monitoring module (200), a gas cylinder sampling module (300), and a gas pressure relief module (400). Multiple modules are connected by high-pressure resistant sealed pipes. A backup compartment (C-1) is detachably connected to one side of the integrated housing (B-1) via a snap-fit ​​structure. The gas source receiving port module (100) includes a first receiving pipe (101), a second receiving pipe (102) and a third receiving pipe (103) fixed to the left side wall of the integrated housing (B-1). The first receiving pipe (101), the second receiving pipe (102) and the third receiving pipe (103) are connected to an air intake pipe (L-1) on the outside. Each branch of the air intake pipe (L-1) is respectively equipped with a first control valve (201), a second control valve (202) and a third control valve (203). The first control valve (201), the second control valve (202) and the third control valve (203) are all connected to a four-way valve (204). The pressure monitoring module (200) includes a delivery pipe (L-2), which is assembled inside an integrated housing (B-1). A pressure gauge (205) and an output shut-off valve (301) are sequentially installed on the delivery pipe (L-2). One end of the delivery pipe (L-2) is connected to a four-way valve (204), and the other end of the delivery pipe (L-2) is connected to a gas cylinder sampling module (300). The gas cylinder sampling module (300) includes a first sampling bottle (303), a second sampling bottle (304), and a confluence inlet valve (302) installed on the bottom wall of the integrated housing (B-1). The first sampling bottle (303) has a first inlet valve (303-1) at its right end and a first outlet valve (303-2) at its left end. The second sampling bottle (304) has a second inlet valve (304-1) at its right end and a second outlet valve (304-2) at its left end. A three-way valve (305) is installed at one end of the confluence inlet valve (302). The gas pressure relief module (400) includes a first discharge pipe (L-3) and a second discharge pipe (L-4) respectively installed inside the right end of the housing (1). One end of the first discharge pipe (L-3) is connected to a three-way valve (305), and a first pressure relief valve (401) is provided on the first discharge pipe (L-3). One end of the second discharge pipe (L-4) is connected to a first outlet valve (303-2) and a second outlet valve (304-2), and a detachable high-pressure venting pipe (403) is installed on the other end of the second discharge pipe (L-4). The delivery pipe (L-2) is connected to the first discharge pipe (L-3) through a branch pipe. The front end of the first pressure relief valve (401) and the second pressure relief valve (402) are both provided with manual unloading valves. The output shut-off valve (301), the confluence inlet valve (302) and the pressure relief valve (401) are connected through a three-way valve (305). The second discharge pipe (L-4) is also provided with a second pressure relief valve (402).

2. The portable simplified device for hydrogen sampling as described in claim 1, characterized in that: The first gas receiving pipe (101) is adapted to the TK25 hydrogen refueling gun of the hydrogen refueling station for high-flow hydrogen sampling at 35MPa; the second gas receiving pipe (102) is adapted to the TK17 hydrogen refueling gun of the hydrogen refueling station for low-flow hydrogen sampling at 35MPa and 70MPa; the third gas receiving pipe (103) is adapted to the 3 / 8” sampling pipeline of the hydrogen production plant for hydrogen sampling in non-hydrogen refueling gun scenarios.

3. The portable simplified device for hydrogen sampling as described in claim 1, characterized in that: The pressure monitoring module (200) has a pressure range of 0-10 MPa; the pressure gauge (205) has a range of not less than 10 MPa and an accuracy class of not less than 0.

4.

4. The portable simplified device for hydrogen sampling as described in claim 1, characterized in that: The first sampling bottle (303) and the second sampling bottle (304) are type IV bottles with a pressure resistance of not less than 35 MPa, and their inner walls are passivated.

5. The portable simplified device for hydrogen sampling as described in claim 1, characterized in that: The detachable connection structure between the high-pressure vent pipe (403) and the second vent pipe (L-4) is a threaded interface. When not in operation, the high-pressure vent pipe (403) can be stored in the rear compartment (C-1).

6. The portable simplified device for hydrogen sampling as described in claim 1, characterized in that: The detection shell is fixedly installed on the top wall of the integrated housing (B-1), and a pressure adjustment knob is provided on the front of the detection shell.

7. The portable simplified device for hydrogen sampling as described in claim 1, characterized in that: The integrated housing (B-1) has multiple sets of casters evenly installed at the four corners of its bottom. The casters are silent casters with braking function. The rear compartment (C-1) is equipped with a sponge cushioning layer.

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