CN219996641U

CN219996641U - Fuel hydrogen circulation sampling device

Info

Publication number: CN219996641U
Application number: CN202320927674.0U
Authority: CN
Inventors: 沈贤
Original assignee: Shanghai Reaflow Fluid System Co ltd
Current assignee: Shanghai Reaflow Fluid System Co ltd
Priority date: 2023-04-23
Filing date: 2023-04-23
Publication date: 2023-11-10
Anticipated expiration: 2033-04-23

Abstract

The utility model provides a fuel hydrogen circulation sampling device, which comprises a main pipeline, wherein one end of the main pipeline is provided with a hydrogen inlet, and a first sampling switch valve for controlling the opening and closing of hydrogen input is arranged at one end of the main pipeline; the other end of the main pipeline is a hydrogen outlet, and a second sampling switch valve for controlling the opening and closing of the hydrogen output is arranged; the main pipeline is provided with a pressure regulating valve, the front end of the pressure regulating valve is provided with a first branch communicated with the front end of the second sampling switch valve, and the first branch is provided with a first pressure relief valve; the pressure regulating valve rear end sets gradually steady voltage part, sampling valve, first quick-operation joint, sample bottle, second quick-operation joint and check valve. The device can effectively adjust the pressure of fuel hydrogen to be sampled, has high stability, can reduce the loss of energy sources in the sampling process, stops fuel hydrogen leakage, and improves the safety of fuel hydrogen sampling.

Description

Fuel hydrogen circulation sampling device

Technical Field

The utility model relates to the technical field of hydrogen quality sampling in a hydrogen energy storage place, in particular to a circulating sampling device for medium-high pressure fuel hydrogen.

Background

The hydrogen energy is the cleanest energy at present, along with the continuous planning and development of the hydrogen energy industry, the supervision of the hydrogen quality forms an extremely important ring in the hydrogen energy industry, and the hydrogen must be sampled and detected in the daily use process of the hydrogen, so that the used fuel hydrogen meets the use standard of a fuel cell engine.

It should be noted that the gaseous hydrogen in the hydrogen station in China has a certain pressure, and the pressure of the fuel hydrogen to be sampled needs to be regulated in the process of hydrogen sampling and checking operation because of the unique physical and chemical properties of the hydrogen energy source and in order to ensure the safety of the hydrogen storage place, so that the hydrogen is required to be prevented from leaking from the process of sample extraction to analysis, and meanwhile, the hydrogen to be sampled is prevented from being polluted so as to obtain a real and accurate detection result.

Disclosure of Invention

Aiming at the problems, the utility model provides a fuel hydrogen circulation sampling device which can effectively regulate the pressure of fuel hydrogen to be sampled, has high stability, can reduce the energy loss in the sampling process, stops the leakage of the fuel hydrogen and improves the safety of the fuel hydrogen sampling.

Specifically, the fuel hydrogen circulation sampling device comprises a main pipeline, wherein one end of the main pipeline is provided with a hydrogen inlet, and a first sampling switch valve for controlling the opening and closing of hydrogen input is arranged; the other end of the main pipeline is a hydrogen outlet, and a second sampling switch valve for controlling the opening and closing of the hydrogen output is arranged;

the main pipeline is provided with a pressure regulating valve for regulating the pressure of the input hydrogen to be sampled, the front end of the pressure regulating valve is provided with a first branch communicated with the front end of the second sampling switch valve, and the first branch is provided with a first pressure relief valve; the pressure regulating valve is characterized in that the rear end of the pressure regulating valve is sequentially provided with a pressure stabilizing component, a sampling valve, a first quick connector, a sampling bottle, a second quick connector and a one-way valve;

the device also comprises a purging introducing pipe connected with the front end of the sampling valve, and a purging medium is introduced into the device through a purging inlet; and a purge eduction tube connected with the rear end of the one-way valve, and introducing purge medium from the device through a purge outlet.

In the above technical solution, the outlet pressure of the pressure regulating valve may be set according to the pressure required for fuel hydrogen sampling, that is, the outlet pressure of the pressure regulating valve should be equal to the pressure required for fuel hydrogen sampling.

In the above technical scheme, the safety of the decompression sampling of the whole sampling device is improved by arranging the decompression protection on the front end and the rear end of the pressure regulating valve and arranging the overpressure protection on the rear end of the pressure regulating valve. Specific:

first, set up first relief valve on first branch road and can carry out quick pressure release to the main line of the front end of air-vent valve, improve the security that the device was used. It should be noted that the front end of the pressure regulating valve according to the present utility model refers to a main line portion between the first switching valve and the pressure regulating valve; when the hydrogen to be sampled with a certain pressure is input into the front end of the pressure regulating valve, the part of the hydrogen does not pass through the pressure regulating valve, so that the front end of the pressure regulating valve is a main pipeline part with higher pressure.

Secondly, in the technical scheme, the pressure stabilizing component is arranged to stabilize and buffer the hydrogen to be sampled after pressure regulation, so that the pressure stability in the system sampling process is improved, the vibration of system sampling is reduced, and the use safety of the system is improved. Furthermore, the pressure stabilizing component is a flow stabilizing pipe and/or a buffer steel cylinder, and the flow stabilizing pipe and the buffer steel cylinder can be used singly or in combination for secondary buffer, so that the stability of the sampling pressure of the system is improved.

It should be noted that the front end of the sampling valve according to the present utility model refers to the main line portion between the sampling valve and the pressure stabilizing member, but it should be noted that when the pressure stabilizing member includes a pressure stabilizing tube and a buffer steel cylinder, the purge introducing tube may be connected to the main line portion between the pressure stabilizing tube or the buffer steel cylinder and the sampling valve, or may be connected to the main line portion between the pressure stabilizing tube and the buffer steel cylinder.

And thirdly, further, a second branch communicated with the front end of the second sampling switch valve is arranged at the rear end of the pressure regulating valve, and a second pressure relief valve is arranged on the second branch. The second pressure relief valve can be used for relieving pressure of a main pipe section at the rear end of the pressure regulating valve, and the safety of the device is further improved. It should be noted that the rear end of the pressure regulating valve in the present utility model refers to a main pipeline between the pressure regulating valve and the pressure stabilizing component; after the hydrogen to be sampled passes through the pressure regulation of the pressure regulating valve, the pressure of the hydrogen to be sampled in the rear end of the pressure regulating valve is the pressure of the outlet of the pressure regulating valve, which is set according to the fuel hydrogen sampling requirement.

Fourth, further, the rear end of the pressure regulating valve is provided with a third branch communicated with the front end of the second sampling switch valve, and the third branch is provided with an unloading valve. The unloading valve is arranged at the rear end of the pressure regulating valve, so that overpressure protection can be carried out on fuel hydrogen to be sampled after the pressure is regulated by the pressure regulating valve, and if the pressure of the fuel hydrogen to be sampled after the pressure is regulated by the pressure regulating valve is higher than the pressure requirement of the pressure stabilizing component, the unloading valve is opened, part of the fuel hydrogen to be sampled is input into the front end of the second sampling switch valve and finally is discharged from the hydrogen outlet; if the pressure of the fuel hydrogen to be sampled after pressure regulation by the pressure regulating valve meets the pressure requirement of the pressure stabilizing component, then the fuel hydrogen meeting the pressure requirement flows into the flow stabilizing pipe and/or the buffer steel cylinder to be stabilized and buffered, and the fuel hydrogen with relatively stable pressure is input into the sampling bottle through the first quick connector, so that the safety performance of the pressure reducing process of the system is improved.

The beneficial effects of the utility model are as follows: the pressure of fuel hydrogen to be sampled is regulated by setting a pressure regulating valve so as to meet the pressure requirement of sampling; the front end of the pressure regulating valve is provided with the first pressure relief valve, the rear end of the pressure regulating valve is provided with the second pressure relief valve, the unloading valve and the steady flow component, so that the stability of the circulating sampling device can be improved, the leakage problem of fuel hydrogen can be avoided, and the use safety can be improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

In the drawings:

FIG. 1 shows a schematic diagram of a fuel hydrogen cycle sampling apparatus of the present utility model;

fig. 2 shows a schematic structural view of a fuel hydrogen circulation sampling panel of the present utility model.

Wherein the above figures include the following reference numerals:

i-main line, II-first branch, III-purge inlet pipe, IV-purge outlet pipe, V-second branch, VI-third branch, 11-hydrogen inlet, 12-hydrogen outlet, 13-first sampling switch valve, 14-second sampling switch valve, 2-pressure regulating valve, 21-first pressure relief valve, 22-second pressure relief valve, 23-unloading valve, 31-steady flow pipe, 32-buffer steel cylinder, 4-sampling valve, 41-first pressure gauge, 42-second pressure gauge, 51-first quick connector, 52-second quick connector, 6-sampling bottle, 7-check valve, 81-purge inlet, 82-purge outlet, 83-third switch valve, 84-fourth switch valve.

Detailed Description

The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. It should be noted that relational terms such as "first" and "second" and the like in the present embodiment are used solely to distinguish one element from another element having the same name, and do not necessarily require or imply any such actual relationship or order between the elements. Features defining "first," "second," etc. may explicitly or implicitly include one or more such features.

In the description of the present utility model, it should be noted that, unless explicitly specified and defined otherwise, the term "connected" shall be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

Example 1

As shown in fig. 1, the fuel hydrogen circulation sampling device of the present embodiment includes a main pipeline i, one end of the main pipeline i is a hydrogen inlet 11, and a first sampling switch valve 13 for controlling the opening and closing of the hydrogen input is provided; the other end of the main pipeline I is provided with a hydrogen outlet 12, and a second sampling switch valve 14 for controlling the opening and closing of the hydrogen output is arranged;

the main pipeline I is provided with a pressure regulating valve 2 for regulating the pressure of the input hydrogen to be sampled, the front end of the pressure regulating valve 2 is provided with a first branch II communicated with the front end of a second sampling switch valve 14, and the first branch II is provided with a first pressure relief valve 21; the rear end of the pressure regulating valve 2 is sequentially provided with a pressure stabilizing component, a sampling valve 4, a first quick connector 51, a sampling bottle, a second quick connector 52 and a one-way valve 7;

the present embodiment can set the outlet pressure of the pressure regulating valve 2 according to the pressure required for fuel hydrogen sampling, i.e. the outlet pressure of the pressure regulating valve 2 should be equal to the pressure required for fuel hydrogen sampling. The first pressure release valve 21 is arranged on the first branch II, so that the main pipeline I at the front end of the pressure regulating valve 2 can be rapidly released, and the use safety of the device is improved. The pressure stabilizing component is arranged to stabilize and buffer the hydrogen to be sampled after pressure regulation, so that the pressure stability in the system sampling process is improved, the vibration of system sampling is reduced, and the use safety of the system is improved.

In this embodiment, a check valve 7 is provided to ensure the flow direction of the fuel hydrogen to be sampled.

Optionally, the sampling device further comprises a purge introducing pipe III connected with the front end of the sampling valve 4, and purge medium is introduced into the device through a purge inlet 81; and a purging eduction tube IV connected with the rear end of the one-way valve 7, and a purging medium is educed from the device through a purging outlet 82. The method reduces the corrosion of residual gas after sampling to the hardware facilities of the device and the influence of hydrogen embrittlement effect through purging operation, improves the service life of the equipment, and ensures the safety and stability of the equipment for long-term use.

Optionally, a second branch v is disposed at the rear end of the pressure regulating valve 2 and is communicated with the front end of the second sampling switch valve 14, and a second pressure release valve 22 is disposed on the second branch v. The second pressure release valve 22 can be used for releasing pressure of the main pipeline I part at the rear end of the pressure regulating valve 2, so that the safety of the device is further improved.

Optionally, a third branch line vi is disposed at the rear end of the pressure regulating valve 2 and is communicated with the front end of the second sampling switch valve 14, and an unloading valve 23 is disposed on the third branch line vi. An unloading valve 23 is arranged at the rear end of the pressure regulating valve 2, so that overpressure protection can be carried out on the fuel hydrogen to be sampled after the pressure regulation of the pressure regulating valve 2, and if the pressure of the fuel hydrogen to be sampled after the pressure regulation of the pressure regulating valve 2 is higher than the pressure requirement of the pressure stabilizing component, the unloading valve 23 is opened, and part of the fuel hydrogen to be sampled is input into the front end of the second sampling switch valve 14 and finally discharged from the hydrogen outlet 12; if the pressure of the fuel hydrogen to be sampled after the pressure regulation by the pressure regulating valve 2 meets the pressure requirement of the pressure stabilizing component, then the fuel hydrogen meeting the pressure requirement flows into the flow stabilizing pipe 31 and/or the buffer steel cylinder 32 for pressure stabilizing and buffering, and the fuel hydrogen with relatively stable pressure is input into the sampling bottle 6 through the first quick connector 51, so that the safety performance of the pressure reducing process of the system is improved.

Optionally, the pressure stabilizing component comprises a flow stabilizing pipe 31 and/or a buffer steel cylinder 32 which are sequentially connected along the hydrogen input direction of the fuel to be sampled, and the pressure stabilizing component in the fuel hydrogen circulation sampling device shown in fig. 1 comprises the flow stabilizing pipe 31 and the buffer steel cylinder 32. The flow stabilizing pipe 31 and the buffer steel cylinder 32 can be used singly or in combination for secondary buffer, so that the stability of the sampling pressure of the system is improved.

Optionally, a first pressure gauge 41 is provided at the front end of the sampling valve 4. Further, a second pressure gauge 42 is provided at the rear end of the second quick connector 52. A first pressure gauge 41 is provided at the front end of the sampling valve 4 for monitoring the pressure of the fuel hydrogen to be sampled after pressure regulation and stabilization. Further, a second pressure gauge 42 is provided at the rear end of the second quick connector 52 for monitoring the pressure in the main line i from the rear end of the sample bottle. Note that the rear end of the second quick connector 52 refers to the portion of the main line i between the second quick connector 52 and the check valve 7.

Optionally, a third switch valve 83 for controlling the opening and closing of the introduced purge medium is provided on the purge inlet pipe iii, and a fourth switch valve 84 for controlling the opening and closing of the introduced purge medium is provided on the purge outlet pipe iv.

Optionally, the purging medium is nitrogen or helium.

Optionally, the devices of the device are all devices with the inside subjected to silanization treatment, so that the device can be prevented from absorbing impurity components in fuel hydrogen to be sampled, and further, the phenomenon that analysis cannot be effectively performed because part of components in a sample are absorbed by the device is avoided, and the authenticity and accuracy of a sampling detection result are ensured. Wherein the device comprises a pipeline and various components on the pipeline.

Optionally, the sampling bottle is provided with male and female ends of a quick connector detachably connected with the first quick connector 51 and the second quick connector 52, so that the sampling bottle can be quickly removed or installed. Further, the sampling bottle 6 is a sampling steel bottle with a switch needle valve at both ends. Furthermore, the sampling bottle 6 may be set to include a plurality of sampling bottle groups 6, so that the cyclic sampling of the plurality of sampling bottles 6 can be continuously performed, and the sampling efficiency is improved.

It should be noted that when the sampling bottle 6 is completely sampled, the first quick connector 51 and the second quick connector 52 can be quickly connected through a pipeline to form a purging loop, so as to purge the sampled device.

It will be appreciated by those of ordinary skill in the art that the fuel hydrogen cycle sampling apparatus of the present utility model can be used not only for fuel hydrogen cycle sampling, but also for sampling other high pressure gases having similar properties to hydrogen.

It should be noted that the outlet pressure of the pressure regulating valve 2 is 0-20 Mpa; further, the outlet pressure of the pressure regulating valve 2 is < 10Mpa; still further, the outlet pressure of the regulator valve 2 was 7Mpa. The pressure resistance of the steady flow tube 31 is 0-37.5 MPa, and the working pressure of the buffer steel cylinder 32 is 0-20 MPa. The unloading pressure range of the safety unloading valve 23 is 2-41 MPa, and proper unloading pressure can be set according to sampling requirements in the actual use process. Therefore, the device meets the use pressure requirement of 0-37.5 MPa, the hydrogen inlet 11 can be connected with fuel hydrogen to be sampled with the pressure of 20-35 MPa, the outlet pressure of the pressure regulating valve 2 can be set to 0-10 MPa according to the sampling requirement, and the pressure precision is set to 0.25MPa; the unloading valve 23 is set to have an unloading pressure range of 2-41 MPa, the rear end of the pressure regulating valve 2 is connected with the purging eduction tube IV, and the unloading pressure of the unloading valve 23 can be set to be slightly larger than the maximum pressure required by the system sampling in the actual sampling process, so that the overpressure protection performance of the system is improved.

Therefore, the utility model can be used for sampling middle and high pressure fuel hydrogen with the highest applicable pressure of 35Mpa, and can be used for sampling middle and low pressure hydrogen places.

Example 2

The fuel hydrogen circulation sampling device based on the embodiment is shown in fig. 2, and is a sampling panel, and the fuel hydrogen circulation sampling device can be used as a panel form, is beneficial to on-site actual installation and operation, and can be used as an on-site fixed sampling system for stably and safely sampling fuel hydrogen with the pressure less than or equal to 35 Mpa.

Example 3

The present embodiment shows a flow of sampling by using the fuel hydrogen circulation sampling device shown in embodiment 1 under a working condition, and it should be noted that the working condition is only a preferred working condition of the present utility model, and thus the protection scope of the present utility model is limited. The fuel hydrogen sampling process using the apparatus shown in the examples mainly comprises the following steps:

(1) Prepared before sampling. The valves, instrument states and external connection of the device are checked to ensure that all valves are in a closed state, the pressure gauge is in a zero value state, whether the system grounding connection is good or not is checked, and the next operation is performed after the fact that the device runs without abnormality is determined.

The sample bottle is passed through the first quick connector 51 and the second quick connector 52 to the fuel hydrogen circulation sampling device of the present utility model, and the switching needle valves at both ends of the sample bottle are opened. The sampling valve 4, the second sampling switch valve 14 of the device are opened, and then the first sampling switch valve 13 is opened to introduce the fuel hydrogen into the device.

It should be noted that if the fuel hydrogen sampling has no special requirement, the next replacement operation can be directly performed; if a specific sampling pressure is specified, the sampling pressure of the apparatus can be set by adjusting the pressure regulating valve 2.

(2) Sampling. The sampling pressure is monitored by the first pressure gauge 41 and the second pressure gauge 42 after about 30 seconds of replacement, and after the pressure is stable, the on-off needle valve and the first sampling on-off valve 13 on the sampling bottle are closed, and the sampling bottle is removed, so that the sampling is completed. Note that the gas output from the second sampling switch valve 14 during the replacement process is recovered, avoiding leakage of hydrogen.

(3) And (5) pressure relief. After the sampling is finished, the first pressure relief valve 21 and the second pressure relief valve 22 are opened to discharge fuel hydrogen to be sampled in the device; closing the first relief valve 21 when the first pressure gauge 41 indicates 0; after the second pressure gauge 42 shows no pressure, the second sampling switch valve 14 is closed.

(4) And (5) purging. The first quick connector 51 and the second quick connector 52 are quickly connected through a pipeline, the third switch valve 83 and the fourth switch valve 84 are opened to purge the device, after a purging medium is input into the device through the purging inlet pipe III, the front end of the sampling valve 4 is divided into two purging branches, the purging medium of one branch is input into the purging outlet pipe IV from a serial passage of the buffer steel bottle 32-the sampling valve 4-the first quick connector 51-the second quick connector 52-the one-way valve 7, the purging medium of the other branch is input into the purging outlet pipe IV from the stabilizing pipe 31-the second pressure release valve 22-and finally output from the purging outlet pipe IV and is recycled, the empty leakage of fuel hydrogen is avoided, the safety of the system is improved, and the superposition of energy stack loss caused by each sampling is reduced.

After purging for about 1-5 minutes, the third switch valve 83 is closed, and when the readings of the first pressure gauge 41 and the second pressure gauge 42 of the system are all 0, the fourth switch valve 84 and the second pressure relief valve 22 are closed; alternatively, a new sampling bottle is mounted on the first quick connector 51 and the second quick connector 52, and a new cycle of fuel hydrogen sampling operation to be sampled can be performed, so that the fuel hydrogen is circularly sampled.

Example 4

The present embodiment shows a staged condition of sampling by using the fuel hydrogen cycle sampling device shown in embodiment 1 under a special condition, and it should be noted that the staged condition is only a preferred condition of the present utility model, and thus the protection scope of the present utility model is limited.

During sampling, if the working condition of failure of the pressure regulating valve 2 occurs, the first sampling switch valve 13 can be closed, and the first pressure relief valve 21 and the second pressure relief valve 22 can be opened; the first pressure release valve 21 can be used for emergency high-pressure release and pressure release treatment of a part of a high-pressure main pipeline I at the front end of the pressure regulating valve 2, and the released fuel hydrogen to be sampled is output from the hydrogen outlet 12 and recovered; the second pressure release valve 22 is arranged on the main pipeline I at the rear end of the pressure regulating valve 2, and can be used for emergency pressure release at the rear end of the pressure regulating valve 2 and pressure release at the main pipeline I part at the rear end of the pressure regulating valve 2, so that the situation that the pressure regulation control is out of order, the sampled fuel hydrogen pressure is unstable and even the hydrogen leakage is caused is prevented.

The foregoing is a further detailed description of the utility model in connection with specific embodiments, and it is not intended that the utility model be limited to such description. It will be apparent to those skilled in the art that several simple modifications and adaptations of the utility model can be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model.

Claims

1. A fuel hydrogen circulation sampling device is characterized by comprising a main pipeline (I),

one end of the main pipeline (I) is a hydrogen inlet (11) and is provided with a first sampling switch valve (13) for controlling the opening and closing of hydrogen input; the other end of the main pipeline (I) is a hydrogen outlet (12), and a second sampling switch valve (14) for controlling the opening and closing of the hydrogen output is arranged;

the pressure regulating valve (2) for regulating the pressure of the input hydrogen to be sampled is arranged on the main pipeline (I), a first branch (II) communicated with the front end of the second sampling switch valve (14) is arranged at the front end of the pressure regulating valve (2), and a first pressure relief valve (21) is arranged on the first branch (II); the rear end of the pressure regulating valve (2) is sequentially provided with a pressure stabilizing component, a sampling valve (4), a first quick connector (51), a sampling bottle (6), a second quick connector (52) and a one-way valve (7).

2. The fuel hydrogen circulation sampling device according to claim 1, characterized in that it further comprises a purge introduction pipe (iii) connected to the front end of the sampling valve (4), introducing a purge medium into the device through a purge inlet (81); and a purging eduction tube (IV) connected with the rear end of the one-way valve (7) and used for leading out purging medium from the device through a purging outlet (82).

3. The fuel hydrogen circulation sampling device according to claim 1, wherein a second branch (v) communicated with the front end of the second sampling switch valve (14) is provided at the rear end of the pressure regulating valve (2), and a second pressure release valve (22) is provided on the second branch (v).

4. The fuel hydrogen circulation sampling device according to claim 1, wherein a third branch (vi) communicated with the front end of the second sampling switch valve (14) is provided at the rear end of the pressure regulating valve (2), and an unloading valve (23) is provided on the third branch (vi).

5. The fuel hydrogen circulation sampling device according to claim 1, wherein the pressure stabilizing component is a flow stabilizing tube (31) and/or a buffer steel cylinder (32).

6. The fuel hydrogen circulation sampling device according to claim 1, characterized in that a first pressure gauge (41) is provided at the front end of the sampling valve (4).

7. The fuel hydrogen circulation sampling device according to claim 6, characterized in that a second pressure gauge (42) is provided at the rear end of the second quick connector (52).

8. The fuel hydrogen circulation sampling device according to claim 2, wherein the purge inlet pipe (iii) is provided with a third on-off valve (83) for controlling the opening and closing of the introduced purge medium, and the purge outlet pipe (iv) is provided with a fourth on-off valve (84) for controlling the opening and closing of the introduced purge medium.

9. The fuel hydrogen circulation sampling device according to claim 2, wherein the purging medium is nitrogen or helium.

10. The fuel hydrogen circulation sampling device according to any one of claims 1 to 9, wherein the devices of the device are all silanized devices.