CN215065243U - Multipurpose hydrogen-related high-pressure pipe valve testing pipeline and device - Google Patents
Multipurpose hydrogen-related high-pressure pipe valve testing pipeline and device Download PDFInfo
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- CN215065243U CN215065243U CN202121431301.1U CN202121431301U CN215065243U CN 215065243 U CN215065243 U CN 215065243U CN 202121431301 U CN202121431301 U CN 202121431301U CN 215065243 U CN215065243 U CN 215065243U
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Abstract
The utility model discloses a hydrogen high-pressure line valve spare test tube way and testing arrangement are waded to multipurpose. The pipeline structure of the hydrogen supply branch comprises a hydrogen supply branch, a testing branch and a purging branch, wherein the hydrogen supply branch comprises a hydrogen inlet, a filter, a pressure regulating valve, a pneumatic valve XV101, a pressure gauge PI101, a pressure transmitter PT101, a pneumatic valve XV102 and a bleeding port B, the testing branch comprises a front stop valve, a pressure gauge PI102, a pressure transmitter PT102, a testing connection outlet C, a testing connection inlet D and a rear stop valve, and the purging branch comprises a purging inlet, a pneumatic valve XV103 and a one-way valve; the testing device containing the testing pipeline can be used for carrying out comprehensive simulation tests on the safety, reliability and durability of various pipe valve members (such as filters, pneumatic ball valves, safety valves, one-way valves and the like) with different specifications and brands under various and complex working conditions, can be used for quality verification, national qualification certification, periodic calibration test and the like of hydrogen products, and has the advantages of wide application range and low use and maintenance cost.
Description
Technical Field
The utility model relates to a pipe valve spare detects technical field, concretely relates to hydrogen high-pressure pipe valve spare test pipeline and device are waded to multipurpose.
Background
With the increase of population and the continuous improvement of living consumption level of people, the demand of non-renewable resources such as fossil fuel, coal, natural gas and the like is continuously increased, which not only leads to the rapid reduction of the non-renewable resources, but also causes a plurality of environmental problems (such as air pollution, greenhouse effect and the like). Therefore, it is imperative to explore and develop sustainable, clean energy technologies. In recent years, hydrogen energy is a novel energy which can be developed and utilized, is extremely abundant in reserves, inexhaustible and inexhaustible, is considered as an ideal clean energy carrier, is recognized by the world and is a clean new energy which is expected to be demanded by people in the 21 st century most hopefully, so that people are greatly enthusiastic and hopeful for development and application of hydrogen energy. In addition, to popularize the use of hydrogen energy, it is necessary to vigorously build and develop related infrastructure and application equipment, such as various hydrogen-related equipment and derivative products, such as a hydrogen station, a hydrogen energy vehicle, a hydrogen fuel cell, and the like.
On the other hand, due to the physical and chemical characteristics of hydrogen and the flammable and explosive characteristics of a high-pressure hydrogen medium, severe technical requirements are placed on performance indexes such as safety, stability, connection sealing performance, service life and the like of the hydrogen pipe-like valve. At the present stage, in order to ensure the safety of the hydrogen-used pipe valve pieces with different specifications of different manufacturers and meet the requirements of repeated use, professional hydrogen-used pipe valve piece detection equipment is required to be used for carrying out various specialized tests or debugging on the hydrogen-used pipe valve pieces. However, the existing pipe valve performance inspection equipment and method have the following defects:
1. the existing hydrogen energy pipe valve testing tool has multiple types, single suitable testing project, high testing cost and complex operation, and can not meet the requirements of multiple types of performance detection and testing under the actual complex working condition.
2. Most of the existing hydrogen energy pipe valve testing equipment adopts a specific tool or a specific testing pipeline aiming at a specific product, can only meet the test aiming at a single brand or specification product and a single hydrogenation product, and has narrow application range and poor systematization; different test projects need to be realized by a plurality of test devices (or a plurality of tools) to meet the requirements of different test experiments, the required equipment is more, the occupied space is large, the structure, the layout and the operation are complex, and the maintenance and the management are difficult.
3. The existing hydrogen pipe valve testing equipment is usually manually operated on site, the safety is insufficient, the information recording and analysis errors of the feedback testing data are large, and the accuracy and the reliability of the feedback testing data cannot be completely guaranteed through reports.
Disclosure of Invention
An object of the utility model is to provide a hydrogen high-pressure line valve member test tube way and testing arrangement are waded to the multipurpose to solve present hydrogen can valve test equipment (or frock) kind many, function singleness, accuracy not enough, can not satisfy the technical problem of the experimental detection demand of multiplex condition.
In order to solve the technical problem, the utility model adopts the following technical scheme:
design a multipurpose and relate to hydrogen high pressure tube valve spare test tube way, contain:
the hydrogen supply pipeline comprises a hydrogen inlet A, a filter, an automatic pressure regulating valve FV101, a pneumatic valve XV101, a pressure gauge PI101, a pressure transmitter PT101, a pneumatic valve XV102 and a diffusion port B which are connected with corresponding concentrated diffusion branches in sequence by corresponding pipelines; the hydrogen inlet A is communicated with a corresponding hydrogen source;
the test branch is connected with the hydrogen supply pipeline in parallel with the pneumatic valve XV102 and comprises a front end stop valve HNV101, a pressure gauge PI102, a pressure transmitter PT102, a valve test connection outlet C, a valve test connection inlet D and a rear end stop valve HNV101 which are connected by corresponding pipelines; the C or/and D are used for butt joint installation of a valve pipe fitting to be tested;
the purging branch is used for purging the hydrogen supply pipeline and the testing branch and comprises a purging inlet F, a pneumatic valve XV103 and a one-way valve which are sequentially connected through corresponding pipelines; and the purging inlet F is used for being communicated with a corresponding purging gas source.
Preferably, the air-operated valve XV101, the air-operated valve XV102, or/and the air-operated valve XV103 are connected in parallel with corresponding bypass branches, and a corresponding stop valve is provided in each bypass branch.
Preferably, a corresponding one-way valve is provided at the hydrogen inlet.
Preferably, the pneumatic actuators of the pneumatic valves XV101, XV102, and XV103 are respectively connected to the corresponding instrument air sources through the corresponding solenoid valves and pneumatic triplets, so as to realize the opening and closing control of the corresponding pneumatic valves.
The multipurpose hydrogen-related high-pressure pipe valve testing device comprises a rack and a multipurpose hydrogen-related high-pressure pipe valve testing pipeline arranged on the rack.
Further, an installation vertical plate is arranged on one side of the rack, and a pressure gauge PI101, a pressure gauge PI102 and a valve test connection outlet C in the multipurpose hydrogen-related high-pressure pipe valve test pipeline are installed on the installation vertical plate.
The multipurpose hydrogen-related high-pressure pipe valve testing device further comprises a PLC control unit which comprises a PLC controller, an analog input module, an analog output module, a switching power supply and an input/output terminal, wherein the PLC controller receives and processes relevant information collected by the pressure transmitter PT101 and the pressure transmitter PT102 through the analog input module and controls the opening and closing of each electromagnetic valve according to a set value or an input instruction. Compared with the prior art, the utility model discloses a main beneficial technological effect lies in:
1. the utility model carries out comprehensive simulation test on different requirements, safety, reliability, durability and the like under complex working conditions in the actual use environment aiming at different hydrogen brand products and different hydrogen pipe valves (such as filters, pneumatic ball valves, safety valves, one-way valves and the like); the device can be suitable for verification tests, national qualification tests and regular calibration tests of various performance qualities of the existing hydrogen products, and ensures the durability and safety of the products.
2. The utility model discloses the device is operated and is used portably, safe and reliable, and the precision is high, uses the maintenance cost low, but wide application in various hydrogenation machines, add other kinds such as mechanism of qi high, well, the test of low pressure gas industrial chemicals filling equipment's pipe valve spare.
Drawings
Fig. 1 is a diagram of a multi-purpose hydrogen-related high-pressure pipe valve testing pipeline.
Fig. 2 is a schematic diagram of a multi-purpose hydrogen-related high-pressure tube valve testing pipeline.
Fig. 3 is a schematic structural diagram of a multipurpose hydrogen-related high-pressure tube valve testing device.
Fig. 4 is a control schematic diagram of a multipurpose hydrogen-related high-pressure pipe valve testing device.
In the above figures, 1 is a filter, 2 is an air-operated valve XV101, 3 is an air-operated valve XV102, 4 is an air-operated valve XV103, 5 is an automatic pressure regulating valve, 6 is a check valve, 7 is a pressure transmitter PT101, 8 is a pressure transmitter PT101, 9, 10, 11, 12, 13 are stop valves HNV101, HNV102, HNV103, HNV104, HNV105, 14 is pressure gauges PI101, 15 are pressure gauges PI102, 16, 17, 18, 19, 20 are solenoid valves SV101, SV102, SV103, SV104, SV105, 21 are pneumatic triple joints, 22 is a through quick-connect joint, 23 is a ferrule adapter, 24 is a test interface, 25 is a three-way valve block, 26 is a right-angle valve block, 27 is a three-way valve block, 28 is a three-way valve block, 29 is a four-way valve block, 30 is a pressure gauge adapter, 31, 32 is a steel pipe, 33 is a polyurethane gas pipe, 34 is a stand, 35 is a mounting riser, 36 is a control box, 37 is an operation control box, 37 is a hydrogen gas inlet panel, and a hydrogen gas inlet panel, c is a valve test connection outlet, D is a valve test connection inlet, and F is a nitrogen purging inlet.
Detailed Description
The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.
The piping, components, unit modules, piping and sensors in the following embodiments are not specifically described, and are all conventional commercial products.
The first embodiment is as follows: the multipurpose hydrogen-related high-pressure pipe valve testing pipeline structure, referring to fig. 1 and 2, mainly comprises:
1. the hydrogen supply pipeline comprises a hydrogen inlet A, a filter (F101) 1, an automatic pressure regulating valve (FV 101) 5, an air-operated valve (XV101)2, a pressure gauge (PI 101) 14, a pressure transmitter (PT 101) 7, an air-operated valve (XV102)3 and a diffusion port B which are connected with a corresponding centralized diffusion pipeline in sequence, wherein the hydrogen inlet A is connected with a corresponding hydrogen source; the air-operated valve (XV101)2 and the air-operated valve (XV102)3 are respectively connected in parallel with corresponding bypass branches, and corresponding stop valves (HNV 103, HNV 104) 11, 12 are arranged in each bypass branch; if the opening functions of the air-operated valve (XV101)2 and the air-operated valve (XV102)3 are invalid, the stop valve (HNV 103) 11 is manually opened, so that the bypass branch of the air-operated valve (XV101)2 can be opened; similarly, the stop valve (HNV 104) 12 is manually opened, so that the bypass branch of the pneumatic valve (XV102)3 can be opened, and the manual test operation flow can be realized;
the pneumatic actuators of the pneumatic valve XV101, the pneumatic valve XV102 and the automatic pressure regulating valve FV101 are respectively communicated with the corresponding instrument air source through the corresponding solenoid valves (SV 101, SV102 and SV 104) 16, 17 and 19 and the pneumatic triplet 21, so as to realize the opening and closing control of the corresponding pneumatic valve and the automatic pressure regulating valve.
Hydrogen enters the inlet end of a main pipeline from a hydrogen inlet A, passes through a filter (F101) 1, a solenoid valve (SV 104) 19 is electrified, an instrument air source enters a pneumatic actuating mechanism of an automatic pressure regulating valve (FV 101) 5 through a pneumatic triple piece 21, the valve of the automatic pressure regulating valve 5 is opened, and the pressure of the hydrogen is regulated to a set pressure; the electromagnetic valve (SV 101) 16 is electrified, an instrument air source enters the pneumatic actuating mechanism of the pneumatic valve (XV101)2 through the pneumatic triple piece 21, the valve of the pneumatic valve 2 is opened, and hydrogen flows through the pressure gauge PI101 (which measures and displays the pressure value of the main pipeline in real time) 14 and the pressure transmitter PT101 (which collects the pressure data of the main pipeline in real time and transmits the data to the background central processing unit, so that the mutual verification and compensation with the pressure data of the automatic pressure regulating valve FV101 can be realized) 7.
The electromagnetic valve (SV 101) 16 is powered off, the valve is closed, the air source of the branch instrument is cut off, and the valve of the pneumatic valve (XV101)2 is closed; the electromagnetic valve (SV 102) 17 is electrified, an instrument air source enters a pneumatic actuating mechanism of the pneumatic valve (XV102)3 through the pneumatic triplet 21, the valve of the pneumatic valve (XV102)3 is opened, hydrogen flows through the pneumatic valve (XV102)3 and the 'diffusion port B', is discharged out of a main pipeline, enters a centralized diffusion pipeline and is decompressed by a hydrogen supply pipeline.
2. The test branch is connected with the hydrogen supply branch in parallel with the pneumatic valve (XV102)3 and comprises a pressure gauge, a pressure transmitter installation branch and a manual diffusion branch;
the pressure gauge and the pressure transmitter mounting branch are mainly composed of a reducing three-way valve block, a front end stop valve (HNV 101) 9, a pressure gauge (PI 102) 15, a pressure transmitter (PT 102) 8, a connecting joint at a valve test connecting outlet C, a 3/8' steel pipe and other pipe valve parts which are connected by corresponding pipelines; the installation branch is connected with a hydrogen supply pipeline, and a valve test connection outlet C is connected with a valve inlet to be tested. The stop valve (HNV 101) 9 is manually opened, and hydrogen flows through the pressure gauge (PI 102) 15 and the pressure transmitter (PT 102) 8 through the hydrogen supply pipeline.
3. Purging branch circuit for to blow and sweep nitrogen gas in hydrogen supply branch circuit and the test branch circuit, it includes by the purge inlet F, pneumatic valve (XV 103) 4, check valve (CV 101) 6 that correspond the pipeline and connect gradually, and pneumatic valve (XV 103) 4 parallel connection has corresponding bypass branch circuit, and is equipped with stop valve (HNV105)13 in the bypass branch circuit. And the purging inlet F is used for being communicated with a corresponding purging gas source.
After the diffusion port B is communicated with the corresponding concentrated diffusion pipeline and the purge inlet F is communicated with the corresponding purge gas source, if hydrogen exists in the hydrogen supply pipeline (the hydrogen pressure is not less than 0.2 MPa) before nitrogen purging, the electromagnetic valve (SV 102) 17 needs to be opened firstly for electrifying, the instrument air source enters the pneumatic valve (XV102)3 pneumatic actuating mechanism through the pneumatic triple piece (F.R.V101) 21, the pneumatic valve (XV102)3 is opened, and hydrogen of the hydrogen supply branch flows to the concentrated diffusion pipeline; when the hydrogen pressure of the hydrogen supply branch is reduced to 0.2MPa, the electromagnetic valve (SV 102) 17 is powered off, the pneumatic valve (XV102)3 is closed, and the automatic diffusion of the hydrogen supply branch is realized (if the nitrogen blows and the gas does not exist, the automatic diffusion operation of the hydrogen supply branch is not needed); the electromagnetic valve (SV 103) 18 is electrified, an instrument air source enters the pneumatic valve (XV 103) 4 pneumatic actuator through the pneumatic triplet (F.R.V101) 21, the pneumatic valve (XV 103) 4 is opened, nitrogen flows through the one-way valve (CV 101) 6 and enters a hydrogen supply pipeline, when the nitrogen pressure is increased to 0.8MPa, the electromagnetic valve (SV 102) 17 is electrified (the electrified time delay is 5-10 s), the instrument air source enters the pneumatic valve (XV102) 2 pneumatic actuator through the pneumatic triplet (F.R.V101) 21, the valve of the pneumatic valve (XV102)3 is opened, and the nitrogen is discharged into a centralized release pipeline at the moment; the electromagnetic valve (SV 102) 17 is powered off, and the pneumatic valve (XV102)3 is closed; repeating the above actions for 3 times, namely realizing nitrogen purging and replacement of the whole pipeline system by nitrogen.
Example two: a multipurpose hydrogen-related high-pressure pipe valve testing device is shown in figures 3 and 4 and comprises a rack 34, a PLC control unit and the multipurpose testing pipeline structure of the first embodiment mounted on the rack.
An installation vertical plate 35 is arranged on one side of the rack 34, and a pressure gauge (PI 101) 14, a pressure gauge (PI 102) 15 and a valve test connection outlet C in the test pipeline are installed on the installation vertical plate 35.
The intelligent control system comprises a PLC (SR 20 AC/DC/RLY), an analog input module (EM AI 04), an analog output module (EM AQ 02), a switching power supply (PSU 100D 24V/2.1A) and an input/output terminal (including a touch screen and an emergency stop button), wherein the PLC receives and processes related information collected by a pressure transmitter PT101 and a pressure transmitter PT102 through the analog input module and controls the on/off of each electromagnetic valve according to a set value or an input instruction.
The test items which can be implemented by the multipurpose test device comprise valve durability test, valve air tightness test, valve compression strength test, pneumatic valve start and stop service life test, safety valve jump working pressure debugging and the like; the following description will be made by taking a valve durability test and a relief valve take-off working pressure debugging as examples:
(1) valve durability test
Firstly, purging a pipeline according to the following steps before testing (the same applies below):
after the diffusion port B is communicated with the corresponding concentrated diffusion pipeline and the purge inlet F is communicated with the corresponding purge gas source, if hydrogen exists in the hydrogen supply pipeline before nitrogen purge gas (the hydrogen pressure is not less than 0.2 MPa), the electromagnetic valve (SV 102) is electrified, the pneumatic valve XV102 is opened, the hydrogen in the hydrogen supply branch flows to the concentrated diffusion pipeline, when the hydrogen pressure of the hydrogen supply pipeline is reduced to 0.2MPa, the electromagnetic valve SV102 is powered off, the pneumatic valve XV102 is closed, and automatic diffusion of the hydrogen in the hydrogen supply pipeline is realized (if the hydrogen does not exist in the hydrogen supply branch before purge gas, the automatic diffusion operation of the hydrogen in the hydrogen supply branch is not required to be executed); the electromagnetic valve SV103 is electrified, the pneumatic valve XV103 is opened, nitrogen flows through the one-way valve CV101 to enter a hydrogen supply pipeline, when the pressure of the nitrogen is increased to 0.8MPa, the electromagnetic valve SV102 is electrified (the electrification time is delayed for 5-10 s), the pneumatic valve XV102 is opened, and at the moment, the nitrogen is discharged into a centralized diffusion pipeline; and the electromagnetic valve SV102 is powered off, the valve of the air-operated valve XV102 is closed, and the actions are repeated for 3 times, so that the purging is realized.
Ensuring that all the stop valves HNV101, HNV102, HNV103, HNV104 and HNV105 are in a closed state after purging is completed, connecting an inlet of a valve to be tested with the valve C, keeping an outlet of the valve in a sealed state, and then opening the front end stop valve HNV101 to connect a hydrogen supply branch;
thirdly, a hydrogen inlet is communicated with a corresponding hydrogen source, hydrogen flow is purified through a filter F101, the pressure of the hydrogen flow is regulated to a set pressure through an automatic pressure regulating valve, an electromagnetic valve SV101 is electrified to open a pneumatic valve XV101, the hydrogen flow enters a test branch, the pressure of the hydrogen is gradually regulated to be increased from 0MPa to the maximum working pressure of a valve to be tested, after pressure maintaining is carried out for at least 3s, an electromagnetic valve SV102 is electrified to open a pneumatic valve XV102 to discharge hydrogen and release pressure to zero;
fourthly, the step III is repeatedly circulated, the total circulation frequency is not less than 30000 times, and the circulation frequency is not higher than 15 times/minute.
(2) Regulating jump working pressure of safety valve
Firstly, performing pipeline purging (the same as the above) before testing;
ensuring that all the stop valves HNV101, HNV102, HNV103, HNV104 and HNV105 are in a closed state after purging is completed, connecting an inlet of a safety valve to be tested with the C, butting an outlet of the safety valve to the D, and then opening the front end stop valve HNV101 and the rear end stop valve HNV 102;
introducing hydrogen flow from the hydrogen inlet, purifying by the filter F101, and regulating the pressure to a set pressure by an automatic pressure regulating valve;
opening an electromagnetic valve SV101, enabling an execution air source to enter a pneumatic actuating mechanism of a pneumatic valve XV101, opening the pneumatic valve XV101, enabling hydrogen to enter a hydrogen supply pipeline, enabling the hydrogen supply pipeline to be in a boosting state at the moment, checking the pressure value of a main pipeline through a pressure gauge PG101, detaching a protective cover of the safety valve when the pressure of the hydrogen in the pipeline rises to the tripping pressure of the safety valve to be detected, loosening a locking nut of the protective cover, rotating a pressure adjusting rod to adjust the set pressure, if the safety valve normally trips and normally exhausts, indicating that the tripping pressure of the safety valve is set, and locking the locking nut after the safety valve is adjusted, and installing the protective cover;
and fifthly, closing the front end stop valve HNV101, and detaching the inspected safety valve to finish the debugging process.
The present invention has been described in detail with reference to the accompanying drawings and embodiments, but those skilled in the art will understand that various specific parameters in the above embodiments can be changed or equivalent substitutions can be made on related parts, structures and materials without departing from the scope of the present invention, so as to form a plurality of specific embodiments, which are common variations of the present invention and will not be described in detail herein.
Claims (7)
1. A multipurpose hydrogen-related high-pressure pipe valve testing pipeline is characterized by comprising:
the hydrogen supply pipeline comprises a hydrogen inlet A, a filter F101, an automatic pressure regulating valve FV101, a pneumatic valve XV101, a pressure gauge PI101, a pressure transmitter PT101, a pneumatic valve XV102 and a diffusion port B which are connected with corresponding concentrated diffusion branches in sequence by corresponding pipelines; the hydrogen inlet A is communicated with a corresponding hydrogen source;
the test branch circuit is connected with the pneumatic valve XV102 in parallel and comprises a front end stop valve HNV101, a pressure gauge PI102, a pressure transmitter PT102, a valve test connection outlet C, a valve test connection inlet D and a rear end stop valve HNV102 which are connected by corresponding pipelines; the valve test connection outlet C or/and the test connection inlet D are/is used for butt joint installation of a valve pipe fitting to be tested;
the purging branch is used for purging the hydrogen supply pipeline and the testing branch and comprises a purging inlet F, a pneumatic valve XV103 and a one-way valve CV101 which are sequentially connected through corresponding pipelines; and the purging inlet F is used for being communicated with a corresponding purging gas source.
2. The multipurpose hydrogen-related high-pressure pipe valve testing pipeline as claimed in claim 1, wherein the pneumatic valve XV101, the pneumatic valve XV102 or/and the pneumatic valve XV103 are respectively connected in parallel with corresponding bypass branches, and a corresponding stop valve is arranged in each bypass branch.
3. The multipurpose hydrogen-related high-pressure pipe valve test pipeline as claimed in claim 1, wherein a corresponding check valve is arranged at the hydrogen gas inlet.
4. The multipurpose hydrogen-related high-pressure pipe valve testing pipeline as claimed in claim 1, wherein pneumatic actuators of the pneumatic valves XV101, XV102 and XV103 are respectively connected to corresponding instrument air sources through corresponding solenoid valves and pneumatic triplets, so as to realize the on-off control of the corresponding pneumatic valves.
5. A multipurpose hydrogen-related high-pressure pipe valve testing device, comprising a rack and further comprising the multipurpose hydrogen-related high-pressure pipe valve testing pipeline as claimed in claim 1, which is mounted on the rack.
6. The multipurpose hydrogen-related high-pressure pipe valve testing device according to claim 5, wherein a mounting vertical plate is arranged on one side of the rack, and a pressure gauge PI101, a pressure gauge PI102 and a valve testing connection outlet C in the multipurpose hydrogen-related high-pressure pipe valve testing pipeline are mounted on the mounting vertical plate; and the pneumatic actuating mechanisms of the pneumatic valves XV101, XV102 and XV103 are respectively communicated with the corresponding instrument air sources through the corresponding solenoid valves and pneumatic triplets so as to realize the opening and closing control of the corresponding pneumatic valves.
7. The multipurpose hydrogen-related high-pressure pipe valve testing device according to claim 6, further comprising a PLC control unit, wherein the PLC control unit comprises a PLC controller, an analog input module, an analog output module, a switching power supply and an input/output terminal, the PLC controller receives and processes relevant information collected by the pressure transmitter PT101 and the pressure transmitter PT102 through the analog input module, and controls the on/off of each electromagnetic valve according to a set value or an input instruction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121431301.1U CN215065243U (en) | 2021-06-26 | 2021-06-26 | Multipurpose hydrogen-related high-pressure pipe valve testing pipeline and device |
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| CN202121431301.1U CN215065243U (en) | 2021-06-26 | 2021-06-26 | Multipurpose hydrogen-related high-pressure pipe valve testing pipeline and device |
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| CN215065243U true CN215065243U (en) | 2021-12-07 |
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| CN202121431301.1U Active CN215065243U (en) | 2021-06-26 | 2021-06-26 | Multipurpose hydrogen-related high-pressure pipe valve testing pipeline and device |
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