A gas supply independent hydrogen cylinder port valve air passage structure

Abstract

The utility model relates to a kind of hydrogen cylinder valve air passage structure of independent gas supply and filling gas.The utility model includes shell, including shell body and cylindrical portion, and the gas supply air passage and the gas filling air passage being set inside cylindrical portion and being separated from each other;Gas supply connector is connected to shell body and is communicated with one end of gas supply air passage;Flow limiting valve assembly is connected to cylindrical portion and is communicated with the other end of gas supply air passage;Electric stop valve assembly is connected to shell body and is set on the flow path of gas supply air passage;Manual stop valve assembly is connected to shell body and is communicated with electric stop valve assembly and gas supply connector respectively;Gas filling connector is connected to shell body and is communicated with one end of gas filling air passage;Gas filling nozzle is connected to cylindrical portion and is communicated with the other end of gas filling air passage.The utility model is convenient for guaranteeing the cleanliness of gas in cylinder and gas when supplying, and it is convenient to determine problem and overhaul when failure.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure hydrogen valve technology, and in particular to a gas channel structure for a hydrogen cylinder valve with independent filling and supply. Background Technology

[0002] The hydrogen cylinder valve is an important component of the fuel cell hydrogen supply system. Its main function is to intelligently control the high-pressure hydrogen in the storage cylinder as a cylinder valve device. It can perform filling and releasing operations on the hydrogen cylinder, and also has safety functions such as real-time temperature detection and feedback, automatic and manual pressure relief. It is used frequently in conjunction with new energy fuel cell vehicles.

[0003] Most existing hydrogen cylinder valves use the same gas line for both filling and supply without isolation. This makes it difficult to effectively filter impurities in the gas during filling and venting operations. Furthermore, the electric shut-off valve is passively opened during filling due to the pressure, reducing its effective lifespan. The integrated filling and supply lines also increase the difficulty of fault analysis. Summary of the Invention

[0004] Therefore, this utility model provides a hydrogen cylinder valve gas passage structure with independent filling and supply gas paths, which facilitates ensuring the cleanliness of the gas inside the cylinder and during gas supply, and facilitates problem identification and repair in case of malfunction.

[0005] To solve the above technical problems, this utility model provides a hydrogen cylinder valve gas passage structure with independent filling and supply, comprising: The shell includes an outer shell body and a columnar portion extending outward from the outer shell body for engaging with the mouth of a hydrogen cylinder. The columnar portion has a gas supply channel and a gas filling channel that are separated from each other. The gas supply channel and the gas filling channel are connected from the bottom end of the columnar portion and extend into the interior of the outer shell body. An air supply connector is connected to the outer casing and communicates with one end of the air supply passage. A flow-limiting valve assembly is connected to the columnar portion and communicates with the other end of the air supply passage; An electric shut-off valve assembly is connected to the housing body and disposed in the flow path of the air supply passage; A manual shut-off valve assembly is connected to the housing body and communicates with the electric shut-off valve assembly and the gas supply connector respectively; gas can flow from the electric shut-off valve assembly to the manual shut-off valve assembly, and from the manual shut-off valve assembly to the gas supply connector. An inflation connector is connected to the outer shell body and communicates with one end of the inflation channel; An inflation nozzle is connected to the columnar portion and communicates with the other end of the inflation air passage.

[0006] In one embodiment of this utility model, a TPRD air passage is further provided inside the columnar part, and a manual release valve assembly and a TPRD device are provided on the outer shell body. The TPRD air passage is connected to the air supply passage through the manual release valve assembly, and the TPRD device is connected to the air supply passage.

[0007] In one embodiment of this utility model, a mounting hole is further provided in the columnar part, and a temperature sensor is inserted into the mounting hole. The detection end of the temperature sensor can extend into the hydrogen cylinder to monitor the temperature inside the hydrogen cylinder.

[0008] In one embodiment of this utility model, the outer wall of the columnar portion is provided with an external thread that mates with the hydrogen cylinder.

[0009] In one embodiment of this utility model, a one-way valve is integrated inside the gas filling nozzle to prevent gas from leaking out of the hydrogen cylinder.

[0010] In one embodiment of this utility model, both the air supply connector and the air filling connector are integrated with filters.

[0011] In one embodiment of this utility model, the electric shut-off valve assembly is normally closed and opens when energized.

[0012] In one embodiment of this utility model, the manual shut-off valve assembly is normally open.

[0013] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The present invention describes a hydrogen cylinder valve gas passage structure with independent filling and supply channels, which facilitates ensuring the cleanliness of the gas inside the cylinder and during gas supply; filling the cylinder will not affect the electric shut-off valve and reduce its reliability; and it facilitates problem identification and repair in case of malfunction.

[0014] This utility model's gas duct structure includes a TPRD gas duct and a manual release valve assembly. When the internal temperature of the hydrogen cylinder rises abnormally, the TPRD device can activate promptly to release the high-pressure hydrogen gas inside the cylinder, preventing dangerous accidents. The columnar section contains a temperature sensor mounting hole, allowing the sensor to directly extend into the hydrogen cylinder to monitor the hydrogen temperature in real time. The data can be fed back to the control system, providing accurate temperature parameters for the safe operation of the hydrogen cylinder and facilitating early warning and protection. Attached Figure Description

[0015] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0016] Figure 1 This is a schematic diagram showing the location of each air passage at the bottom of the housing of this utility model.

[0017] Figure 2 This is a cross-sectional view of the air supply duct.

[0018] Figure 3 This is a cross-sectional view of the airway.

[0019] Figure 4 This is a cross-sectional view of the air supply channel and the air filling channel.

[0020] Figure 5 This is a cross-sectional view of the air passage in this utility model.

[0021] Explanation of reference numerals in the instruction manual: 100. Air supply duct; 200. Inflation duct; 300. TPRD duct; 400. Mounting hole; 1. Electric shut-off valve assembly; 2. Manual shut-off valve assembly; 3. Flow limiting valve assembly; 4. Inflation connector; 5. Inflation nozzle; 6. Air supply connector; 7. Manual release valve assembly; 8. TPRD device; 9. Housing; 91. Housing body; 92. Columnar part; 10. Temperature sensor. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0023] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0024] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0025] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0026] Reference Figures 1 to 5 As shown, the present invention provides a hydrogen cylinder valve gas passage structure with independent filling and supply, comprising: The housing 9 includes an outer shell body 91 and a columnar portion 92 extending outward from the outer shell body 91 for engaging with the mouth of a hydrogen cylinder. The columnar portion 92 is provided with a gas supply channel 100 and a gas filling channel 200 that are separated from each other. The gas supply channel 100 and the gas filling channel 200 pass through the bottom end of the columnar portion 92 and extend into the interior of the outer shell body 91. The air supply connector 6 is connected to the outer casing 91 and communicates with one end of the air supply passage 100; The flow limiting valve assembly 3 is connected to the columnar portion 92 and communicates with the other end of the air supply passage 100; An electric shut-off valve assembly 1 is connected to the housing body 91 and disposed in the flow path of the air supply passage 100; The manual shut-off valve assembly 2 is connected to the housing body 91 and is respectively connected to the electric shut-off valve assembly 1 and the gas supply connector 6; gas can flow from the electric shut-off valve assembly 1 to the manual shut-off valve assembly 2, and from the manual shut-off valve assembly 2 to the gas supply connector 6. Inflation connector 4 is connected to the outer shell body 91 and communicates with one end of the inflation channel 200; An inflation nozzle 5 is connected to the columnar portion 92 and communicates with the other end of the inflation air passage 200.

[0027] In one embodiment, the columnar portion 92 is further provided with a TPRD air passage 300 (TPRD, thermo-pressure release device), and the outer shell body 91 is provided with a manual release valve assembly 7 and a TPRD device 8. The TPRD air passage 300 is connected to the air supply passage 100 through the manual release valve assembly 7, and the TPRD device 8 is connected to the air supply passage 100.

[0028] In one embodiment, the columnar portion 92 is further provided with a mounting hole 400, into which a temperature sensor 10 is inserted. The sensing end of the temperature sensor 10 can extend into the hydrogen cylinder to monitor the temperature inside the hydrogen cylinder. The temperature data can be fed back to the control system, providing accurate temperature parameters for the safe operation of the hydrogen cylinder, which helps in early warning and protection.

[0029] In one embodiment, the outer wall of the columnar portion 92 is provided with an external thread that mates with the hydrogen cylinder.

[0030] In one embodiment, the inflation nozzle 5 integrates a one-way valve; both the gas supply connector 6 and the inflation connector 4 integrate filters. The inflation connector 4 integrates a filter, which can filter external gas during inflation. The inflation nozzle 5 integrates a one-way valve, allowing gas to flow into the cylinder during inflation; when not inflation is being performed, the one-way valve integrated in the inflation nozzle 5 prevents gas from leaking into the cylinder.

[0031] In one embodiment, the electrically operated shut-off valve assembly 1 is normally closed and opens when energized, while the manually operated shut-off valve assembly 2 is normally open. The normally closed design of the electrically operated shut-off valve assembly 1 ensures that the gas supply is automatically cut off under abnormal conditions, improving safety. The normally open design of the manually operated shut-off valve assembly 2 facilitates daily gas supply operations, allowing the user to manually close it to cut off the gas supply.

[0032] In one embodiment, the flow limiting valve assembly 3, the air inlet nozzle 5, and the temperature sensor 10 are all threadedly connected to the columnar portion 92.

[0033] Through the above configuration, the gas supply channel 100 and the gas filling channel 200 are structurally completely separated, ensuring that filling and supply do not interfere with each other. During hydrogen cylinder filling, the gas passes through the filter in the filling connector 4 to prevent impurities from entering the hydrogen cylinder, thereby improving the purity of the hydrogen inside. During gas supply, the gas passes through the filter in the supply connector 6 to ensure clean and stable output hydrogen, significantly improving the safety and reliability of the fuel cell system.

[0034] The working principle of this utility model is as follows: The hydrogen cylinder valve structure includes a gas supply channel 100. When the hydrogen cylinder valve assembly is installed on the gas cylinder, the gas inside the cylinder flows through the flow-limiting valve assembly 3 to the electrically operated shut-off valve assembly 1. The electrically operated shut-off valve assembly 1 is normally closed and opens when energized, allowing the gas to flow through it to the manually operated shut-off valve assembly 2. The manually operated shut-off valve assembly 2 is normally open, and the gas flows through it and then through the gas supply connector 6 to the downstream pipeline. The gas supply connector 6 integrates a filter, which filters the gas supplied downstream by the hydrogen cylinder valve, ensuring the cleanliness of the supplied gas. If an abnormality occurs in the gas supply channel 100, the manually operated shut-off valve assembly 2 can be manually closed to prevent accidental leakage of gas from the cylinder to the outside.

[0035] The hydrogen cylinder valve structure includes a gas filling channel 200. When the hydrogen cylinder valve assembly is installed on the gas cylinder, gas can be filled into the cylinder through the filling connector 4. The filling connector 4 integrates a filter to filter external gas during filling. The filling nozzle 5 integrates a one-way valve. During filling, gas can be poured into the hydrogen cylinder through the filling nozzle 5. When not filling, the one-way valve integrated in the filling nozzle 5 will prevent gas from leaking from the hydrogen cylinder to the outside.

[0036] The hydrogen cylinder valve structure includes a TPRD (Transmission Threat Relief) channel 300 and a manual release valve inlet channel. When the hydrogen cylinder valve assembly is installed on the cylinder, the gas inside the cylinder enters the housing 9 through the TPRD channel 300. The manual release valve assembly 7 is normally closed, and together with the TPRD device 8, it seals the gas within the TPRD channel 300, preventing leakage to the outside. In case of an emergency release due to an abnormality in the hydrogen cylinder, the manual release valve assembly 7 can be manually opened to allow the gas to exit the cylinder through the gas supply connector 6. If the temperature inside the hydrogen cylinder is too high, the TPRD device 8 can be activated, allowing the gas inside the cylinder to be released to the outside through the TPRD channel 300.

[0037] The hydrogen cylinder valve passage structure has a mounting hole 400 for mounting a temperature sensor 10 to monitor the temperature value inside the hydrogen cylinder.

[0038] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gas channel structure for an independent hydrogen cylinder valve with separate filling and supply, characterized in that, include: The shell (9) includes an outer shell body (91) and a columnar portion (92) extending outward from the outer shell body (91) for engaging with the mouth of a hydrogen cylinder. The columnar portion (92) is provided with a gas supply channel (100) and a gas filling channel (200) separated from each other. The gas supply channel (100) and the gas filling channel (200) pass through the bottom end of the columnar portion (92) and extend into the interior of the outer shell body (91). An air supply connector (6) is connected to the outer casing (91) and communicates with one end of the air supply passage (100); A flow limiting valve assembly (3) is connected to the columnar portion (92) and communicates with the other end of the air supply passage (100); An electric shut-off valve assembly (1) is connected to the housing body (91) and disposed in the flow path of the air supply passage (100); The manual shut-off valve assembly (2) is connected to the housing body (91) and is in communication with the electric shut-off valve assembly (1) and the gas supply connector (6) respectively; gas can flow from the electric shut-off valve assembly (1) to the manual shut-off valve assembly (2) and from the manual shut-off valve assembly (2) to the gas supply connector (6). An inflation connector (4) is connected to the outer shell body (91) and communicates with one end of the inflation air passage (200); An inflation nozzle (5) is connected to the columnar portion (92) and communicates with the other end of the inflation air passage (200).

2. The gas channel structure for an independent hydrogen cylinder valve with independent filling and supply according to claim 1, characterized in that, The columnar part (92) is also provided with a TPRD air passage (300). The outer shell body (91) is provided with a manual release valve assembly (7) and a TPRD device (8). The TPRD air passage (300) is connected to the air supply passage (100) through the manual release valve assembly (7). The TPRD device (8) is connected to the air supply passage (100).

3. The gas channel structure for an independent hydrogen cylinder valve with independent filling and supply according to claim 1, characterized in that, The columnar part (92) is also provided with an installation hole (400), and a temperature sensor (10) is inserted into the installation hole (400). The detection end of the temperature sensor (10) can extend into the hydrogen cylinder to monitor the temperature inside the hydrogen cylinder.

4. The gas channel structure of an independent hydrogen cylinder valve for filling and supplying gas according to claim 1, characterized in that, The outer wall of the columnar part (92) is provided with an external thread that mates with the hydrogen cylinder.

5. The gas channel structure for an independent hydrogen cylinder valve with independent filling and supply according to claim 1, characterized in that, The gas filling nozzle (5) is equipped with a one-way valve to prevent gas from leaking out of the hydrogen cylinder.

6. The gas channel structure of an independent hydrogen cylinder valve for filling and supplying gas according to claim 1, characterized in that, Both the air supply connector (6) and the air filling connector (4) have integrated filters.

7. The gas channel structure for an independent hydrogen cylinder valve with independent filling and supply according to claim 1, characterized in that, The electric shut-off valve assembly (1) is normally closed and opens when energized.

8. The gas channel structure of an independent hydrogen cylinder valve for filling and supplying gas according to claim 1, characterized in that, The manual shut-off valve assembly (2) is normally open.

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