Combination valve of high-pressure hydrogen storage cylinder for vehicle

Abstract

The utility model discloses a vehicle high-pressure hydrogen storage cylinder combination valve which comprises a valve body composed of an upper valve block and a lower valve block, an inlet and outlet connector, a stop valve connector, an electromagnetic valve connector and a TPRD connector are arranged on the side wall of the upper valve block, an overflow valve connector is arranged on the lower end face of the lower valve block, an inflation and deflation channel and a pressure relief channel are arranged in the valve body, and an inlet and outlet connector is arranged in the inlet and outlet connector. A stop valve assembly is installed in the stop valve connector, an electromagnetic valve assembly is installed in the electromagnetic valve connector, a TPRD assembly is installed in the TPRD connector, an overflow valve assembly is installed in the overflow valve connector, the stop valve and the electromagnetic valve are used for opening and closing the inflation and deflation channel, the pressure relief channel can relieve pressure after the TPRD pressure relief valve is opened, and a temperature detection cover integrally formed with the lower valve block is arranged on the lower end face of the lower valve block. A plug-in mounting channel is arranged in the valve body, the temperature sensor is inserted in the plug-in mounting channel, a detection head of the temperature sensor is located in the temperature detection cover, and the stop valve connector and the electromagnetic valve connector are oppositely arranged.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a combination valve for high-pressure hydrogen storage cylinders used in vehicles. Background Technology

[0002] A combination valve is installed on the neck of a high-pressure gas cylinder. This combination valve is used for filling and supplying gas to the cylinder. The existing combination valve structure includes: a valve body composed of an upper valve block and a lower valve block, which are connected vertically and integrally formed; a temperature sensor inserted into the valve body; and the sensor's probe extending from the lower end face of the lower valve block to detect the gas temperature in the cylinder. The point where the sensor probe extends out of the lower valve block needs to be sealed. An external thread for connecting to the internal thread of the cylinder neck is provided on the side wall of the lower valve block. An inlet / outlet port, a normally open shut-off valve port, a normally closed shut-off valve port, a solenoid valve port, and a TPRD connector are provided on the side wall of the upper valve block. The valve body has a first shut-off valve chamber at the bottom of the normally open shut-off valve interface, a second shut-off valve chamber at the bottom of the normally closed shut-off valve interface, a solenoid valve chamber at the bottom of the solenoid valve interface, and a TPRD valve chamber at the bottom of the TPRD interface. An overflow valve interface is located on the lower end face of the lower valve block, with an overflow valve chamber at its bottom. The valve body contains a charging / discharging channel, a pressure relief channel, and a discharge channel. One end of the charging / discharging channel is connected to the bottom of the inlet / outlet interface. The first shut-off valve chamber and the solenoid valve chamber are connected in series to the charging / discharging channel. The other end of the charging / discharging channel is connected to the bottom of the overflow valve chamber. The inlets of the pressure relief channel and the discharge channel are both located on the lower end face of the lower valve block. The TPRD valve chamber is connected in series... On the pressure relief channel, the second shut-off valve chamber is connected in series with the discharge channel. The outlets of both the pressure relief channel and the discharge channel are located on the upper valve block. Inlet and outlet connectors for connecting to pipelines are detachably installed in the inlet and outlet ports. A first shut-off valve assembly is detachably installed in the normally open shut-off valve port, a second shut-off valve assembly is detachably installed in the normally closed shut-off valve port, a solenoid valve assembly is detachably installed in the solenoid valve port, a TPRD assembly is detachably installed in the TPRD port, and an overflow valve assembly is detachably installed in the overflow valve port. The first shut-off valve assembly and the first shut-off valve chamber constitute a first shut-off valve, and the second shut-off valve assembly and the second shut-off valve chamber constitute a second shut-off valve. The solenoid valve assembly and the solenoid valve chamber constitute a solenoid valve, and the overflow valve assembly and the overflow valve chamber constitute a gas supply overflow valve. The first shut-off valve and the solenoid valve are both used to close or open the gas filling and discharging channels. The first shut-off valve is a normally open shut-off valve. When the solenoid valve is damaged and cannot be closed, the gas filling and discharging channels can be cut off by closing the first shut-off valve. The second shut-off valve is used to close or open the venting channel. The second shut-off valve is a normally closed shut-off valve. Under normal circumstances, the gas cylinder can be vented by opening the solenoid valve. When the solenoid valve is damaged and cannot be opened, the gas in the gas cylinder can be vented by opening the second shut-off valve through the venting channel. The gas supply overflow valve is used to regulate the flow rate through the valve body during gas supply. The TPRD assembly and the TPRD valve chamber constitute a TPRD pressure relief valve. The pressure relief channel is used to depressurize the gas cylinder after the TPRD pressure relief valve is opened.The disadvantages of the existing bottle mouth combination valve are: (1) Since the temperature sensor's detection head extends out of the lower valve block, it needs to be fixed and sealed by a connecting mechanism and a sealing ring. When the temperature sensor is damaged, all the gas in the gas storage bottle needs to be released and the lower bottle mouth combination valve needs to be disassembled before the temperature sensor can be disassembled and repaired. In addition, the temperature sensor's detection head extending out of the lower valve block will increase the leakage point; (2) Since there are two shut-off valves in the bottle mouth combination valve, the structure of the bottle mouth combination valve is more complicated, the leakage point increases, and the production cost is higher. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a combined valve for high-pressure hydrogen storage cylinders for vehicles with fewer leakage points, simplified structure, and reduced production cost.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: a combined valve for a high-pressure hydrogen storage cylinder in a vehicle, comprising: a valve body, which is composed of an upper valve block and a lower valve block; an inlet / outlet interface, a shut-off valve interface, a solenoid valve interface, and a TPRD interface are provided on the side wall of the upper valve block; a shut-off valve cavity is provided at the bottom of the shut-off valve interface; a solenoid valve cavity is provided at the bottom of the solenoid valve interface; and a TPRD valve cavity is provided at the bottom of the TPRD interface; an overflow valve interface is provided on the lower end face of the lower valve block; an overflow valve cavity is provided at the bottom of the overflow valve interface; a charging / discharging channel and a pressure relief channel are provided in the valve body; one end of the charging / discharging channel is connected to the bottom of the inlet / outlet interface; the shut-off valve cavity and the solenoid valve cavity are connected in series on the charging / discharging channel; and the other end of the charging / discharging channel is connected to the bottom of the overflow valve cavity. The inlet of the pressure relief channel is located on the lower end face of the lower valve block. The TPRD valve chamber is connected in series with the pressure relief channel, and the outlet of the pressure relief channel is located on the upper valve block. Inlet and outlet connectors for connecting to pipelines are detachably installed in the inlet and outlet interfaces. A stop valve assembly is detachably installed in the stop valve interface. A solenoid valve assembly is detachably installed in the solenoid valve interface. A TPRD assembly is detachably installed in the TPRD interface. An overflow valve assembly is detachably installed in the overflow valve interface. The stop valve assembly and stop valve chamber constitute a stop valve. The solenoid valve assembly and solenoid valve chamber constitute a solenoid valve. The overflow valve assembly and overflow valve chamber constitute a gas supply overflow valve. Both the stop valve and the solenoid valve are used to close or open the charging / discharging channel. The gas supply overflow valve is used to regulate the flow rate through the valve body during gas supply. The TPRD assembly and TPRD valve cavity constitute a TPRD pressure relief valve. The pressure relief channel is used to relieve pressure on the gas cylinder after the TPRD pressure relief valve is opened. The key feature is that a temperature detection cover is provided on the lower end face of the lower valve block, and the temperature detection cover is integrally formed with the lower valve block. An insertion channel is also provided in the valve body, with the inlet of the insertion channel located on the upper end face of the upper valve block. The insertion channel communicates with the inner cavity of the temperature detection cover. A temperature sensor is inserted into the insertion channel, and the sensor head is located in the temperature detection cover to detect the gas temperature in the gas cylinder. The shut-off valve interface and the solenoid valve interface are arranged opposite each other. After the shut-off valve assembly is disassembled, a tool can pass through the shut-off valve interface and the charging / discharging channel to forcibly open the solenoid valve.

[0005] Furthermore, in the aforementioned combined valve for high-pressure hydrogen storage cylinders used in vehicles, the inlet / outlet connectors, shut-off valve assembly, solenoid valve assembly, TPRD assembly, and overflow valve assembly are all threadedly connected to their corresponding interfaces; the temperature sensor is threadedly connected to the insert channel.

[0006] Furthermore, in the aforementioned high-pressure hydrogen storage cylinder combination valve for vehicles: a filter is installed in the inlet and outlet joints, so that the filling gas will be filtered by the filter before entering the valve body; a filter cover is threadedly connected to the port of the overflow valve assembly, so that the gas in the storage cylinder will be filtered by the filter cover before entering the gas supply overflow valve.

[0007] Furthermore, in the aforementioned combined valve for high-pressure hydrogen storage cylinders used in vehicles, the filter is a filter sleeve with its outer port closed and its inner port open and connected to the filling and discharging channel. A filter screen is provided on the side wall of the filter sleeve.

[0008] Furthermore, in the aforementioned combined valve for high-pressure hydrogen storage cylinders used in vehicles, the thickness of the temperature detection cover is no greater than 2mm.

[0009] The advantages of this utility model are as follows: The vehicle-mounted high-pressure hydrogen storage cylinder combination valve has built-in filters in the inlet and outlet ports, effectively filtering impurities in the filling gas. Furthermore, the filter cover on the port of the flow valve assembly effectively filters impurities in the gas from the storage cylinder, resulting in cleaner gas entering the valve body. This protects the combination valve components from contamination, extends valve life, and reduces leakage and other failure rates. With the temperature detection cover installed, the temperature sensor can be disassembled and repaired directly without releasing gas from the storage cylinder or disassembling the valve, thereby reducing maintenance costs and increasing maintenance efficiency. This design ensures safety. Furthermore, because the shut-off valve interface and the solenoid valve interface are arranged opposite each other, the charging / discharging channel between them can be a straight channel. Under normal circumstances, the gas cylinder can be vented by opening the solenoid valve. However, if the solenoid valve is damaged and cannot be opened, the shut-off valve assembly can be disassembled, and a special tool can be used to force the solenoid valve open through the shut-off valve interface and the charging / discharging channel, thereby achieving the purpose of venting the gas cylinder. With this setup, the original venting channel and the normally closed shut-off valve on the venting channel can be eliminated, thus simplifying the valve structure, reducing valve costs, and minimizing leakage points. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the combined valve for a high-pressure hydrogen storage cylinder in a vehicle according to the present invention.

[0011] Figure 2 This is a structural diagram of the inlet and outlet interfaces. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0013] like Figure 1 , Figure 2As shown, a combined valve for a high-pressure hydrogen storage cylinder in a vehicle includes: a valve body 1, which is composed of an upper valve block 2 and a lower valve block 3. The upper valve block 2 and the lower valve block 3 are connected vertically and integrally formed. An external thread for connecting to the internal thread of the cylinder opening is provided on the side wall of the lower valve block 3. An inlet / outlet interface, a shut-off valve interface, a solenoid valve interface, and a TPRD interface are provided on the side wall of the upper valve block 2. A shut-off valve cavity is provided at the bottom of the shut-off valve interface, a solenoid valve cavity is provided at the bottom of the solenoid valve interface, and a TPRD valve cavity is provided at the bottom of the TPRD interface. An overflow valve interface is provided on the lower end face of the lower valve block, and an overflow valve cavity is provided at the bottom of the overflow valve interface. A charging / discharging channel and a pressure relief channel are provided in the valve body 1. One end of the charging / discharging channel is connected to the bottom of the inlet / outlet interface. The shut-off valve cavity and the solenoid valve cavity are connected in series on the charging / discharging channel. The other end of the charging / discharging channel is connected to the bottom of the overflow valve cavity. The inlet of the pressure relief channel is provided with... The TPRD valve chamber is connected in series with the pressure relief channel on the lower end face of the lower valve block 3. The outlet of the pressure relief channel is located on the upper valve block 2. Inlet / outlet connectors 5 for connecting to pipelines are detachably installed in the inlet / outlet interfaces. A stop valve assembly 6 is detachably installed in the stop valve interface. A solenoid valve assembly 7 is detachably installed in the solenoid valve interface. A TPRD assembly 8 is detachably installed in the TPRD interface. An overflow valve assembly 9 is detachably installed in the overflow valve interface. The stop valve assembly 6 and the stop valve chamber constitute a stop valve. The solenoid valve assembly 7 and the solenoid valve chamber constitute a solenoid valve. The overflow valve assembly 9 and the overflow valve chamber constitute a gas supply overflow valve. Both the stop valve and the solenoid valve are used to close or open the charging / discharging channels. The gas supply overflow valve is used to regulate the flow rate through the valve body 1 during gas supply. When the flow rate exceeds the rated threshold of the gas supply overflow valve, the gas supply overflow valve will close, stopping the gas supply from the gas cylinder. The TPRD assembly 8 and the TPRD valve cavity constitute a TPRD pressure relief valve. The pressure relief channel is used to relieve pressure on the gas cylinder after the TPRD pressure relief valve is opened. A temperature detection cover 4 is provided on the lower end face of the lower valve block 3. The temperature detection cover 4 is integrally formed with the lower valve block 3. An insertion channel is also provided in the valve body 1. The inlet of the insertion channel is located on the upper end face of the upper valve block 2. The insertion channel is connected to the inner cavity of the temperature detection cover 4. The temperature sensor is inserted into the insertion channel. The detection head of the temperature sensor is located in the temperature detection cover 4 and is used to detect the gas temperature in the gas cylinder. In order to accurately detect the temperature, the thickness of the temperature detection cover 4 is no more than 2mm. After the temperature detection cover is set, the temperature sensor can be disassembled and repaired directly without releasing the gas in the gas cylinder and without disassembling the valve.Because the shut-off valve interface and the solenoid valve interface are arranged opposite each other, the charging / discharging channel between them is a straight channel. Normally, the gas cylinder can be vented by opening the solenoid valve. However, if the solenoid valve is damaged and cannot be opened, the shut-off valve assembly 6 can be removed. A tool can be used to force the solenoid valve open through the shut-off valve interface and the charging / discharging channel, thus venting the gas cylinder. This setup eliminates the need for the original venting channel and the normally closed shut-off valve on it, simplifying the valve structure, reducing valve costs, and minimizing leakage points.

[0014] A filter 10 is installed in the inlet / outlet connector 5, and the filling gas is filtered by the filter 10 before entering the valve body 1; a filter cover 11 is threadedly connected to the port of the overflow valve assembly 9, and the gas in the gas storage bottle is filtered by the filter cover 11 before entering the gas supply overflow valve. The shut-off valve, solenoid valve, TPRD pressure relief valve, and gas supply overflow valve are all existing valves.

[0015] In use, the combined valve of the vehicle high-pressure hydrogen storage cylinder is screwed onto the cylinder mouth through the external thread on the lower valve block 3, and the shut-off valve is normally open.

[0016] During filling, the filling pipe is connected to the inlet / outlet connector 5. The gas is filtered by the filter 10 in the inlet / outlet connector 5 to prevent impurities in the filling gas from entering the valve body 1. The filling gas enters the filling / discharging channel of the valve body 1 from the inlet / outlet connector 5. Then the filling gas pushes open the solenoid valve and enters the gas storage cylinder through the gas supply overflow valve.

[0017] During gas supply, the gas pipe is connected to the inlet / outlet connector 5, and the solenoid valve is energized and opened. The gas in the gas cylinder is filtered by the filter cover 11 to prevent impurities in the gas in the gas cylinder from entering the valve body 1. Then, the gas passes through the gas supply overflow valve into the filling and discharging channel. The gas supply overflow valve can regulate the gas supply flow rate to prevent excessive flow from impacting the solenoid valve. When the flow rate exceeds the rated threshold of the gas supply overflow valve, the gas supply overflow valve will close, causing the gas cylinder to stop supplying gas. The gas in the filling and discharging channel enters the gas pipe through the inlet / outlet connector 5, thus supplying downstream use. When the solenoid valve is damaged and cannot be closed, the filling and discharging channel can be closed manually by closing the shut-off valve, thereby stopping the gas supply from the gas cylinder.

[0018] When the ambient temperature of the gas cylinder exceeds a certain value, such as 110℃, the fusible alloy in the TPRD pressure relief valve will soften due to heat, allowing the TPRD pressure relief valve to be opened under the action of high-pressure gas in the gas cylinder. After the TPRD pressure relief valve is opened, the gas cylinder can be depressurized through the pressure relief channel.

[0019] In this embodiment, to facilitate installation, simplify the valve, and reduce its size, the inlet / outlet connector 5, the shut-off valve assembly 6, the solenoid valve assembly 7, the TPRD assembly 8, and the overflow valve assembly 9 are all threaded into their respective interfaces. The temperature sensor is threaded into the cartridge channel.

[0020] like Figure 2 As shown, filter 10 is a filter sleeve with a closed outer port and an open inner port that is connected to the inflation / deflation channel. A filter screen is provided on the side wall of the filter sleeve.

Claims

1. A combination valve for high-pressure hydrogen storage cylinders used in vehicles, including: The valve body consists of an upper valve block and a lower valve block. The upper valve block has an inlet / outlet port, a shut-off valve port, a solenoid valve port, and a TPRD port on its side wall. The shut-off valve port has a shut-off valve chamber at its bottom, the solenoid valve port has a solenoid valve chamber at its bottom, and the TPRD port has a TPRD valve chamber at its bottom. The lower valve block has an overflow valve port on its lower end face, with an overflow valve chamber at its bottom. The valve body contains a charging / discharging channel and a pressure relief channel. One end of the charging / discharging channel is connected to the bottom of the inlet / outlet port. The shut-off valve chamber and the solenoid valve chamber are connected in series to the charging / discharging channel. The other end of the charging / discharging channel is connected to the bottom of the overflow valve chamber. The pressure relief channel inlet is located on the lower end face of the lower valve block. The PRD valve chamber is connected in series with the pressure relief channel, the outlet of which is located on the upper valve block. Inlet and outlet connectors for connecting to pipelines are detachably installed in the inlet and outlet ports. A shut-off valve assembly is detachably installed in the shut-off valve port, a solenoid valve assembly is detachably installed in the solenoid valve port, a TPRD assembly is detachably installed in the TPRD port, and an overflow valve assembly is detachably installed in the overflow valve port. The shut-off valve assembly and shut-off valve chamber constitute a shut-off valve, the solenoid valve assembly and solenoid valve chamber constitute a solenoid valve, and the overflow valve assembly and overflow valve chamber constitute a gas supply overflow valve. Both the shut-off valve and the solenoid valve are used to close or open the charging / discharging channels, and the gas supply overflow valve is used to regulate the flow rate through the valve body during gas supply. The TPRD assembly and TPRD valve cavity constitute a TPRD pressure relief valve. The pressure relief channel is used to relieve pressure on the gas cylinder after the TPRD pressure relief valve is opened. The key feature is that a temperature detection cover is provided on the lower end face of the lower valve block, and the temperature detection cover is integrally formed with the lower valve block. An insertion channel is also provided in the valve body, with the inlet of the insertion channel located on the upper end face of the upper valve block. The insertion channel communicates with the inner cavity of the temperature detection cover. A temperature sensor is inserted into the insertion channel, and the sensor head is located in the temperature detection cover to detect the gas temperature in the gas cylinder. The shut-off valve interface and the solenoid valve interface are arranged opposite each other. After the shut-off valve assembly is disassembled, a tool can pass through the shut-off valve interface and the charging / discharging channel to forcibly open the solenoid valve.

2. The combined valve for high-pressure hydrogen storage cylinders in vehicles according to claim 1, characterized in that: Inlet / outlet connectors, shut-off valve assemblies, solenoid valve assemblies, TPRD assemblies, and overcurrent valve assemblies are all threaded into their corresponding interfaces; the temperature sensor is threaded into the cartridge channel.

3. The combined valve for high-pressure hydrogen storage cylinders in vehicles according to claim 1 or 2, characterized in that: A filter is installed in the inlet and outlet joints, and the filling gas is filtered by the filter before entering the valve body; a filter cover is threadedly connected to the port of the overflow valve assembly, and the gas in the gas storage bottle is filtered by the filter cover before entering the gas supply overflow valve.

4. The combined valve for high-pressure hydrogen storage cylinders in vehicles according to claim 3, characterized in that: The filter is a filter sleeve with a closed outer port and an open inner port that is connected to the inflation / deflation channel. A filter screen is installed on the side wall of the filter sleeve.

5. The combined valve for high-pressure hydrogen storage cylinders in vehicles according to claim 1 or 2, characterized in that: The thickness of the temperature detection cover should not exceed 2mm.

Images