A combined valve body built in a gas cylinder

Abstract

The application relates to a combined valve body built in a gas cylinder, which comprises a base and a valve port, the valve port is rotatably installed on the left top of the base through a replacement groove, an installation groove is arranged on the right top of the base, a stop valve is installed in the installation groove, a first embedding groove, a second embedding groove and a third embedding groove are sequentially arranged on the bottom of the base, a two-stage pressure reducing valve is installed in the second embedding groove, and a gas filling one-way valve is arranged in the third embedding groove, the gas filling one-way valve comprises a body, a multistage flow port and a one-way plugging assembly. The combined valve body is built in the gas cylinder, the exposed length and volume of the combined valve body outside the gas cylinder are reduced, different structure gas discharge valve ports and gas filling valve ports are arranged, the gas cylinder can realize the gas discharge and gas filling effects after the different valve ports are installed, the combined valve body can realize the same port gas filling and gas discharging, the exposed size and volume of the combined valve body are minimized, the valve body is less likely to be knocked, and the operation convenience is improved.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen cylinder technology, specifically relating to a valve body built into a gas cylinder. Background Technology

[0002] As a key component of hydrogen power technology, the design of the hydrogen power valve directly affects the efficiency of hydrogen storage and utilization. Existing hydrogen power valves require simultaneous filling and venting functions, necessitating at least two gas inlets for hydrogen processing, resulting in a large overall valve size. However, in practice, to facilitate control and regulation of the hydrogen inside the cylinder, the valve is typically installed externally, leading to an excessively large exposed area. This makes the valve susceptible to impacts and damage during use, affecting its lifespan and safety. Furthermore, existing valves cannot monitor the hydrogen pressure inside the cylinder in real time, hindering the timely detection and handling of overpressure conditions, potentially leading to cylinder explosions and other safety accidents.

[0003] Therefore, a method was designed to achieve simultaneous filling and discharging of hydrogen cylinders, reduce the volume of the valve body, and place the valve body inside the gas cylinder to minimize the exposed area of ​​the valve body, reduce the risk of impact and thus improve service life; it can also monitor the hydrogen pressure inside the gas cylinder in real time and provide the gas pressure value of the gas cylinder to facilitate the estimation of the remaining gas capacity. Summary of the Invention

[0004] The purpose of this invention is to provide a combined valve body built into a gas cylinder to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a combined valve body built into a gas cylinder, comprising a base and a valve port. The valve port is screwed onto the top left side of the base via a replacement groove. An installation groove is provided on the top right side of the base, and a shut-off valve is installed in the installation groove. A first embedding groove, a second embedding groove, and a third embedding groove are sequentially provided on the bottom of the base. A two-stage pressure reducing valve is installed in the second embedding groove, and a one-way inflation valve is provided in the third embedding groove. The one-way inflation valve includes a body, a multi-stage flow port, and a one-way blocking component. A TPRD pressure relief valve is installed on the rear side of the top of the base, and a pressure sensor is embedded on the front side of the top of the base.

[0006] Preferably, the valve port is divided into an inflation valve port or an deflation valve port, and a straight air passage is provided through the inflation valve port.

[0007] Preferably, a circulation air passage is provided in the recessed part of the vent valve port.

[0008] Preferably, the vent valve opening has a bottom sealing air passage, and the bottom of the bottom sealing air passage extends outward to form a connecting air pipe. The connecting air pipe passes through the vent valve opening to form multiple air holes, and the air holes are located on the circulation air passage.

[0009] Preferably, a sealing ring is embedded at both the bottom and the middle of the valve port.

[0010] Preferably, the multi-stage flow port is provided through the body, and the inner diameter of the multi-stage flow port is set in at least three steps. A one-way blocking component is provided in the body below the multi-stage flow port.

[0011] Preferably, the first, second, and third embedding slots are arranged from right to left, with the first embedding slot communicating with the mounting slot and the third embedding slot communicating with the replacement slot. A low-pressure pipe is connected between the upper left side of the second embedding slot and the replacement slot, and a high-pressure pipe is connected between the upper right side of the second embedding slot and the mounting slot.

[0012] Preferably, a filter component is provided in the first embedding slot.

[0013] Preferably, a first pipe is provided inside the base at a position below the TPRD pressure relief valve, and a second pipe is provided inside the base at a position below the pressure sensor.

[0014] Preferably, the shut-off valve has an inverted conical sealing surface.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention places the combined valve body inside the gas cylinder, thereby reducing the exposed length and volume of the combined valve body outside the cylinder, preventing impacts and damage during use, and ensuring its service life and safety. Simultaneously, this invention also includes a pressure sensor for real-time detection and transmission of pressure values ​​within the hydrogen cylinder. This facilitates monitoring and allows operators to promptly detect and address high-pressure situations, intercepting impending overpressure and reducing the risk of cylinder explosions and other safety accidents. Furthermore, it incorporates a TPRD pressure relief valve, which automatically opens when overheating occurs within the hydrogen cylinder, releasing the high-pressure gas stored inside for timely relief. The system effectively detects and handles high-pressure conditions, preventing gas cylinders from exploding due to excessive internal pressure. Furthermore, by designing venting and charging valves with different structures, the gas cylinder can be vented and charged separately with different valves installed. This allows for simultaneous venting and charging of the combined valve body, minimizing the exposed size and volume of the combined valve body, reducing the risk of impacts, and improving operational simplicity, making venting and charging more efficient. Additionally, a sintered metal filter is installed in the venting channel to filter particulate matter and impurities in the released hydrogen, ensuring effective purification of the hydrogen, preventing blockage and malfunction of the combined valve body, and thus guaranteeing a normal hydrogen supply. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a top view of the present invention;

[0019] Figure 3 This is a diagram showing the venting state of the present invention;

[0020] Figure 4 This is a diagram showing the inflation state of the present invention;

[0021] Figure 5 These are perspective views and exploded views of the valve port from a bottom-view perspective in this invention;

[0022] Figure 6 The above are perspective and exploded views of the vent valve port in this invention.

[0023] Figure 7 The figures show a perspective view and an exploded view of the inflation valve port in this invention.

[0024] Figure 8 This is a perspective view and a cross-sectional view of the vent valve port in this invention from another angle;

[0025] Figure 9 This is a perspective view and a cross-sectional view of the inflation valve port from another angle in this invention;

[0026] Figure 10This is a flow chart of the venting process of the present invention;

[0027] Figure 11 This is a flowchart illustrating the inflation process of the present invention.

[0028] Labels in the diagram: 1-Base, 2-Valve port, 201-Inflation valve port, 202-Depression valve port, 3-Replacement slot, 4-Installation slot, 5-Stop valve, 501-Sealing surface, 6-First embedded slot, 7-Second embedded slot, 8-Secondary pressure reducing valve, 9-Third embedded slot, 10-Inflation check valve, 101-Body, 102-Multi-stage flow port, 103-One-way blocking assembly, 11-TPRD pressure relief valve, 12-Pressure sensor, 13-Circulating air passage, 14-Bottom seal air passage, 15-Connecting air pipe, 16-Air hole, 17-Sealing ring, 18-Low-pressure pipe, 19-High-pressure pipe, 20-Filter assembly, 21-First pipe, 22-Second pipe, 23-Straight-through air passage. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] like Figures 1 to 11The diagram shows a combined valve body built into a gas cylinder. The combined valve body includes a base 1 and a valve port 2. The valve port 2 is screwed onto the top left side of the base 1 via a replacement groove 3. An installation groove 4 is provided on the top right side of the base 1, and a shut-off valve 5 is installed in the installation groove 4. A first embedding groove 6, a second embedding groove 7, and a third embedding groove 9 are sequentially provided on the bottom of the base 1. A secondary pressure reducing valve 8 is installed in the second embedding groove 7, and a one-way inflation valve 10 is provided in the third embedding groove 9. The one-way inflation valve 10 includes a body. 101. A multi-stage flow port 102 and a one-way blocking component 103 are provided. A TPRD pressure relief valve 11 is installed on the rear top of the base 1, and a pressure sensor 12 is embedded on the front top of the base 1. The valve port 2 is divided into an inflation valve port 201 or an venting valve port 202. A straight air passage 23 is provided through the inflation valve port 201. A circulation air passage 13 is recessed in the middle of the venting valve port 202. A bottom-sealed air passage 14 is provided in the venting valve port 202. A connecting air pipe 15 extends outward from the bottom of the bottom-sealed air passage 14. Multiple air holes 16 are formed after the vent valve port 202 is passed through, and the air holes 16 are located on the circulating air passage 13; sealing rings 17 are embedded at the bottom and middle of the valve port 2; a multi-stage flow port 102 is provided through the body 101, and the inner diameter of the multi-stage flow port 102 is set in at least 3 steps; a one-way blocking component 103 is provided in the body 101 below the multi-stage flow port 102; the first embedding groove 6, the second embedding groove 7 and the third embedding groove 9 are opened from right to left, and the first embedding groove 6 is connected to the mounting groove. 4. The third embedded groove 9 is connected to the replacement groove 3. A low-pressure pipe 18 is connected between the upper left side of the second embedded groove 7 and the replacement groove 3. A high-pressure pipe 19 is connected between the upper right side of the second embedded groove 7 and the mounting groove 4. A filter assembly 20 is provided in the first embedded groove 6. A first pipe 21 is provided in the base 1 below the TPRD pressure relief valve 11. A second pipe 22 is provided in the base 1 below the pressure sensor 12. The shut-off valve 5 has an inverted conical sealing surface 501.

[0032] This invention places the combined valve body inside the gas cylinder, thereby reducing the exposed length and volume of the combined valve body outside the cylinder, preventing damage from impacts during use, and ensuring its service life and safety. Simultaneously, this invention also includes a pressure sensor 12, which can detect and transmit the pressure value inside the hydrogen cylinder in real time. This facilitates monitoring and allows operators to promptly detect and handle high-pressure situations, intercepting impending overpressure and reducing the occurrence of safety accidents such as gas cylinder explosions. Furthermore, a TPRD pressure relief valve 11 is included. When overheating occurs inside the hydrogen cylinder, the TPRD pressure relief valve 11 automatically opens to release the high-pressure gas stored inside the cylinder, achieving timely emergency response. The system effectively handles high-pressure conditions, preventing gas cylinders from exploding due to excessive internal pressure. Furthermore, by using venting valves 202 and filling valves 201 with different structures, the gas cylinder can be vented and filled separately after installing different valves 2. This allows for simultaneous venting and filling of the combined valve body, minimizing the exposed size and volume of the combined valve body, reducing the risk of impacts, and improving ease of operation, making venting and filling more efficient. Additionally, a sintered metal filter is installed in the venting channel to filter particulate matter and impurities in the released hydrogen, ensuring effective purification of the hydrogen, preventing blockage and malfunction of the combined valve body, and thus guaranteeing a normal hydrogen supply.

[0033] Example 2

[0034] like Figures 1 to 11 The diagram shows a combined valve body built into a gas cylinder, including a base 1 and a valve port 2. The base 1 is the base of the combined valve body and is used to install the necessary components. A replacement groove 3 is provided on the top left side of the base 1, and the valve port 2 is screwed on through the replacement groove 3. During installation, the entire base 1 is simply inserted into the connection port of the hydrogen cylinder to complete the connection. The connection method can be any special connection method such as flange connection, clamp connection, welding, etc., as long as the connection is tight and leak-free. Gas release and gas filling can both be operated through the valve port 2.

[0035] The combined valve body generally includes a shut-off valve 5, a two-stage pressure reducing valve 8, an inflation check valve 10, and a TPRD pressure relief valve 11.

[0036] The TPRD pressure relief valve 11 is located on the top rear side of the base 1, and a first pipe 21 is installed inside the base 1 below the TPRD pressure relief valve 11. After the combined valve body is installed, the TPRD pressure relief valve 11 can directly process the gas in the hydrogen cylinder through the first pipe 21. The TPRD pressure relief valve 11 is generally composed of a rupture disc and a fusible plug connected in series or in parallel. When the TPRD pressure relief valve 11 is applied to hydrogen technology, it should be noted that the triggering of the TPRD pressure relief valve 11 is based on temperature changes, rather than directly on pressure changes. This means that the TPRD pressure relief valve 11 can respond earlier before overpressure occurs, providing more timely protection. When the temperature inside the hydrogen cylinder exceeds the preset safety value, the fusible plug or fusible alloy will melt, causing the TPRD pressure relief valve 11 to open automatically, releasing the excess fluid, i.e., the high-pressure gas stored in the cylinder, thereby reducing the pressure inside the cylinder and preventing the cylinder from exploding under overpressure conditions, thus protecting the safety of the hydrogen storage system, i.e., the hydrogen cylinder.

[0037] Understandably, when the rupture disc in the TPRD pressure relief valve 11 is triggered to open, real-time pressure monitoring is required to provide data reference and basis for subsequent monitoring of hydrogen cylinder overpressure. Therefore, a pressure sensor 12 is also embedded in the top front of the base 1, and a second pipe 22 is installed in the base 1 below the pressure sensor 12. After the combined valve body is installed, the pressure sensor 12 can monitor the gas pressure in the hydrogen cylinder through the second pipe 22 and transmit the hydrogen pressure value to the external terminal in real time for the operator to view. This allows the operator to promptly detect and handle high pressure situations, intercept impending overpressure, and reduce the occurrence of safety accidents such as gas cylinder explosions.

[0038] Under normal conditions, an installation groove 4 is provided on the right side of the base 1, and a shut-off valve 5 is installed in the installation groove 4. This valve is used to connect or disconnect the flow of hydrogen. It mainly achieves the cutting off or regulation of hydrogen flow by the linear movement of the valve disc along the center line of the valve seat. Moreover, the shut-off valve is a forced sealing valve. When the valve is closed, pressure must be applied to the valve disc to force the sealing surface 501 to prevent leakage. In this embodiment, the shut-off valve 5 can be set as either a mechanical shut-off valve or an electromagnetic shut-off valve. When the shut-off valve 5 is a mechanical shut-off valve, it must be operated manually. This means that the hydrogen cylinder must be on the ground so that the operator can cut off the flow of hydrogen by pressing the mechanical shut-off valve; conversely, it moves the mechanical shut-off valve upward to connect the flow of hydrogen. When the shut-off valve 5 is an electromagnetic shut-off valve, it indicates that it is electrically controlled. When the electromagnetic coil inside the shut-off valve is not energized, it will cause the valve to be closed, cutting off the flow of hydrogen. Conversely, when the electromagnetic coil is energized, the coil generates a magnetic field that opens the valve, allowing the flow of hydrogen. It should be noted that because the electromagnetic shut-off valve is electrically controlled, in actual use, the operator can adjust different voltages to control the on / off state of the electromagnet, thereby causing the electromagnetic shut-off valve to present different states and controlling the flow of hydrogen. Both types achieve control of hydrogen flow through different settings, thus providing users with more choices. In practical applications, operators can choose the more suitable type of shut-off valve 5 according to the specific application scenario and requirements.

[0039] Correspondingly, a first embedding groove 6 is provided on the bottom right side of the base 1 for discharging hydrogen gas released from the hydrogen cylinder. When there is no overpressure inside the hydrogen cylinder, the shut-off valve 5 will block the first embedding groove 6. When overpressure occurs, simply discharging the high-pressure gas from the hydrogen cylinder will cause its internal pressure to drop rapidly, preventing an explosion. Subsequently, when the pressure inside the hydrogen cylinder reaches a certain set value, the TPRD pressure relief valve 11 is automatically triggered to release the high-pressure gas. At this time, the operator controls the shut-off valve 5 to move upward and no longer block the first embedding groove 6. The high-pressure gas will then automatically be discharged outward through the first embedding groove 6 and enter the secondary pressure reducing valve 8 for pressure reduction. It should be noted that after pressure reduction, the high-pressure gas can reduce its own pressure value to a preset low-pressure state, and then it can be directly delivered to the fuel cell connected to the hydrogen cylinder, which reduces the loss rate of discharged hydrogen to a certain extent, thereby ensuring the utilization rate of hydrogen.

[0040] Therefore, a second embedding groove 7 is provided at the bottom center of the base 1 for embedding and installing the secondary pressure reducing valve 8. The upper right side of the second embedding groove 7 is connected to the mounting groove 4 via a high-pressure pipe 19. Understandably, the sealing surface 501 of the shut-off valve 5 is also set as an inverted cone shape, so that the shut-off valve 5 can not only block the first embedding groove 6 under normal conditions, but also block the high-pressure pipe 19, driving the hydrogen cylinder to maintain normal operation. When there is an overheating phenomenon in the hydrogen cylinder, the TPRD pressure relief valve 11 is automatically triggered to open and release the high-pressure gas, which then flows into the first embedding groove 6. At this time, the operator controls the shut-off valve 5 to open, which can simultaneously open the first embedding groove 6 and the high-pressure pipe 19, causing the high-pressure gas to change direction through the first embedding groove 6 and enter the high-pressure pipe 19, and then enter the secondary pressure reducing valve 8 for pressure reduction. Correspondingly, the upper left side of the second embedding slot 7 is also connected to the replacement slot 3 through a low-pressure pipe 18. That is, the low-pressure hydrogen gas after being processed by the secondary pressure reducing valve 8 will flow upward into the valve port 2 through the low-pressure pipe 18, and the low-pressure hydrogen gas will be transferred again through the valve port 2 and injected into the fuel cell, effectively ensuring the utilization rate of hydrogen gas.

[0041] Secondly, a third embedding groove 9 is provided on the bottom left side of the base 1. The third embedding groove 9 is located directly below the replacement groove 3 and is connected to the replacement groove 3. That is, when the operator needs to replenish the hydrogen cylinder, he can connect the hydrogen filling tube to the valve port 2, and then the hydrogen can be poured into the hydrogen cylinder through the gap between the valve port 2 and the third embedding groove 9. At the same time, in order to avoid the backflow of the filled hydrogen, which would affect the filling efficiency, and to prevent the hydrogen discharged after the explosion from being discharged from the third embedding groove 9, which would cause gas path overlap and equipment damage, a one-way filling valve 10 is also provided in the third embedding groove 9. This valve is used to fill the hydrogen in one direction. The external hydrogen needs to be filled from the valve port to the one-way filling valve 10. That is, at this time, the valve port 2 has a separate filling channel, which is separated from the venting channel to avoid gas path overlap. Conversely, it can also prevent the hydrogen from flowing out through the one-way filling valve 10 when the valve port 2 is vented.

[0042] The inflation check valve 10 includes a body 101, a multi-stage flow port 102, and a one-way blocking component 103. The body 101 is the outer shell of the inflation check valve 10, and the multi-stage flow port 102 is provided inside it. The inner diameter of the multi-stage flow port 102 is set in at least three steps, with the diameter increasing at the lower position. In this embodiment, the multi-stage flow port 102 is specifically divided into three diameter ports. The first-stage port is located at the top of the body 101 and extends upward to connect with the replacement groove 3. The third-stage port is located at the bottom of the body 101 and is equipped with a one-way blocking component 103. Under normal conditions, the one-way blocking component 103 blocks the top opening of the second-stage port. When hydrogen is filled into the hydrogen cylinder through the inflation check valve 10, the one-way blocking component 103 will no longer block the second-stage port. Since the diameter of the third-stage port is larger than that of the second-stage port, the multi-stage flow port 102 is in an open state at this time, which helps to achieve the filling of hydrogen.

[0043] For ease of understanding, this embodiment specifically configures the one-way blocking component 103 with the following components, but is not limited to the above components: the one-way blocking component 103 includes a ball valve, a spring and a vent base. The vent base is composed of a structure that is centrally closed and has four annular vents evenly opened on the outside. The ball valve is connected to the center of the top of the vent base by a spring. The spring extends upward and is laid on the multi-stage flow port 102. The ball valve abuts against the top opening of the secondary port. Under normal conditions, the ball valve blocks the upper part of the secondary port under the force of the spring. When the hydrogen cylinder supplies the fuel cell and other equipment normally, the hydrogen will flow out in the designated flow channel and will not affect the charging check valve 10. However, when an overpressure occurs in the hydrogen cylinder, the valve port 2 acts as a vent, and the hydrogen will be released in large quantities directly under the action of the TPRD pressure relief valve 11. At this time, the force of the hydrogen is upward at the opening of the hydrogen cylinder. When it flows to the charging check valve 10, it will first enter the body 101 from the tertiary port. Then, the hydrogen acts upward on the ball valve, which will cause the ball valve to be more tightly pressed against the upper part of the secondary port to avoid gas path overlap. The hydrogen flows out from the charging check valve 10. Conversely, when the hydrogen cylinder is low on hydrogen and needs to be filled, valve port 2 acts as a filling port. The hydrogen filling tube is connected to valve port 2, and hydrogen flows through valve port 2 into the filling check valve 10 in the third embedded groove 9, impacting the ball valve downwards. When the hydrogen reaches a certain filling level, the ball valve moves downwards under pressure and no longer blocks the secondary port. Hydrogen can then fill the cylinder through the multi-stage flow port 102 and diffuse outwards through the annular vent on the outside of the vent base. At this time, the spring is compressed. When the hydrogen cylinder is filled with a certain amount of hydrogen, the spring's restoring force overcomes the impact force of the hydrogen, causing the ball valve to move upwards again to block the secondary flow port and stop filling.

[0044] In summary, to reduce the overall volume of the combined valve body, this invention specifically sets only one valve port, enabling simultaneous filling and discharging of the hydrogen cylinder. However, it is foreseeable that when the hydrogen cylinder is being discharged, it cannot be guaranteed that the hydrogen entering the valve port will not directly impact the filling check valve 10 downwards, causing gas path chaos. Therefore, to avoid mutual interference between the two during discharge, which could lead to gas turbulence affecting the normal operation of the combined valve body, the valve port is further subdivided into a filling valve port 201 and a discharging valve port 202, corresponding to the filling and discharging states of the gas cylinder, respectively. Through their different internal structures, they can simultaneously satisfy the discharging function while blocking the filling pipeline, and simultaneously satisfy the filling function while blocking the discharging pipeline. This not only ensures that filling and discharging do not affect each other, but also allows for simultaneous filling and discharging of the hydrogen cylinder. While maintaining the basic functional effect of the combined valve body, it also greatly reduces the overall volume of the combined valve body. This also has significant economic value for equipment that requires large amounts of hydrogen, such as industrial hydrogen production equipment.

[0045] Example 3

[0046] It should be noted that the inflation valve port 201 and the deflation valve port 202 have largely the same appearance, mainly to facilitate replacement within the replacement slot 3. The replacement slot 3 is the largest hole on the base 1, indicating that the valve port 2 to be installed therein is the most important component. When the appearance of both the inflation valve port 201 and the deflation valve port 202 is set to match the replacement slot 3, the inflation valve port 201 and the deflation valve port 202 can be easily and quickly replaced, to some extent satisfying the effect of simultaneous filling and deflation of the hydrogen cylinder. Furthermore, a sealing ring 17 is embedded at the bottom and top of the valve port 2, which seals and isolates the inflation and deflation pipelines. The specific isolation details will be explained later.

[0047] A straight air passage 23 is provided through the inflation valve port 201. It is known that the third insert groove 9 is located directly below and connected to the replacement groove 3. Therefore, when the inflation valve port 201 is installed into the replacement groove 3, it will cause the straight air passage 23 to connect with the third insert groove 9. After connecting the hydrogen filling tube to the inflation valve port 201, hydrogen will flow downwards through the straight air passage 23 into the inflation check valve 10 in the third insert groove 9, and impact the ball valve downwards, causing it to move downwards, thus opening the multi-stage flow port 10. 2. When opened, hydrogen gas can be rapidly filled into the hydrogen cylinder by diffusing outward through the multi-stage flow port 102 and the annular vent. At this time, the spring is compressed. During the filling process, since the filling valve port 201 is installed in the replacement tank 3 and the filling valve port 201 is completely sealed, the filling valve port 201 will directly block the low-pressure pipe 18. Therefore, even if hydrogen gas is released, it cannot be discharged, ensuring perfect blockage of the venting pipe during the filling process and avoiding mutual interference between the two.

[0048] It is important to note that the vent valve 202 is not a conventional cylindrical shape. Instead, it has a circulation air passage 13 located on the outer side of its center. Specifically, the circulation air passage 13 is designed with a concave inward curve in the middle of the vent valve 202, giving it an "I" shape. Inside the vent valve 202, there is a bottom-sealing air passage 14. This bottom-sealing air passage 14 extends downward from the top of the vent valve 202, ending at the circulation air passage 13 on the outer side of the vent valve 202. A connecting air pipe 15 extends from the inside out, connecting... After the trachea 15 passes through the vent valve port 202, it forms multiple air holes 16. For example, in this embodiment, the trachea 15 is actually in the shape of a cross. After the trachea 15 extends outward and passes through the valve port 2, it can form 4 air holes 16. When the trachea 15 is in the shape of a rice character, it can form 6 air holes 16 after passing outward. All air holes 16 are located on the circulating airway 13. That is, the operator can use the specific shape of the trachea 15 according to the actual required discharge volume. If a larger discharge volume is required, a trachea 15 with more air holes 16 can be selected. Similarly, the operator needs to rotate and install the vent valve 202 into the replacement tank 3. After installation, the circulation channel 13 on the vent valve 202 will face the outlet of the low-pressure pipeline 18. That is, the low-pressure hydrogen gas processed by the secondary pressure reducing valve 8 will be discharged to the left into the circulation channel 13 through the low-pressure pipeline 18, and then enter the connecting gas pipe 15 through the gas hole 16 on the circulation channel 13. The connecting gas pipe 15 will concentrate the hydrogen gas flow into the bottom sealing gas pipe 14, and then transmit it upward to the fuel cell through the bottom sealing gas pipe 14. During the entire venting process, since the bottom of the vent valve 202 is completely sealed, it can perfectly prevent the downward transmission of hydrogen gas and prevent it from accidentally entering the charging one-way valve 10, which would cause the hydrogen gas path to overlap.

[0049] It is evident that by separately configuring the filling valve port 201 and the venting valve port 202, hydrogen can be refilled through the same port, and both the filling and venting ports have independent flow channels. During filling, the flow channels are isolated from each other, and during venting, they are isolated from each other, preventing hydrogen from flowing towards the filling check valve 10 during venting and causing overlap in the hydrogen cylinder's gas path. This not only ensures that filling and venting do not interfere with each other but also allows for simultaneous filling and venting of the hydrogen cylinder through the same port. While maintaining the basic functional effects of the combined valve body, it also significantly reduces the overall volume of the combined valve body. This also has significant economic value for equipment that requires large amounts of hydrogen, such as industrial hydrogen production equipment.

[0050] The steps for using this invention can be fully explained as follows:

[0051] 1. Under normal operating conditions, valve port 2 of the hydrogen cylinder is the venting valve port 202. At this time, pressure sensor 12 monitors the pressure in the hydrogen in real time. When the hydrogen cylinder is in an overpressure or overtemperature state, TPRD pressure relief valve 11 is automatically triggered to open and release the high-pressure gas in the hydrogen cylinder. The high-pressure gas flows upward to the opening of the hydrogen cylinder. At this time, due to the influence of the filling check valve 10, the high-pressure gas will not flow upward from the third embedded groove 9, but will flow into the first embedded groove 6. At this time, the operator controls the shut-off valve 5. When the valve is opened, the first insert trough 6 and the high-pressure pipe 19 are opened, and the high-pressure gas flows into the high-pressure pipe 19 through the first insert trough 6. Then it enters the secondary pressure reducing valve 8 for pressure reduction to obtain low-pressure hydrogen. The low-pressure hydrogen continues to flow to the upper left through the low-pressure pipe 18 into the circulation gas channel 13. The gas vent 16 on the circulation gas channel 13 enters the connecting gas pipe 15. The connecting gas pipe 15 concentrates the hydrogen flow into the bottom sealing gas channel 14, and then it is transported upward through the bottom sealing gas channel 14 to the fuel cell, completing the hydrogen discharge treatment and reuse.

[0052] 2. Since rupture discs and fusible plugs are generally disposable, after the hydrogen cylinder completes one release operation, the pressure sensor 12 will immediately process the data and transmit all the obtained hydrogen pressure values ​​to the external terminal to remind the operator. The operator can choose an appropriate time to refill the hydrogen cylinder with hydrogen and then replenish the rupture disc.

[0053] 3. During filling, the operator needs to remove the vent valve 202 from the replacement slot 3, and then install the filling valve 201 onto the hydrogen cylinder. Due to the closed design of the filling valve 201, it will directly isolate the low-pressure pipeline 18, ensuring the isolation of the venting channel during the filling process. Then, connect the hydrogen filling tube to the filling valve 201, fill in the hydrogen, and let it flow down through the straight air passage 23 to impact the filling check valve 10. The ball valve moves downward under force to open the multi-stage flow port 102, and then diffuses outward through the annular vent, completing the rapid filling of the hydrogen cylinder. After filling, the spring compression drives the ball valve to move upward to block the multi-stage flow port 102. At this time, the filling valve 201 is removed, and the vent valve 202 is installed to continue using the hydrogen cylinder.

[0054] Furthermore, since sealing rings 17 are embedded at the bottom and top of valve port 2, the sealing rings 17 can be made of sealing materials such as rubber rings, and must be O-shaped to match the shape of valve port 2. During inflation, the bottom sealing ring 17 can prevent hydrogen entering the inflation check valve 10 from flowing back and overflowing into the replacement tank 3, while the top sealing ring 17 can prevent hydrogen from overflowing from the gap between the inflation valve port 201 and the low-pressure pipe 18, thus sealing the inflation process. During deflation, the top sealing ring 17 can prevent the discharged hydrogen from overflowing into the replacement tank 3, while the bottom sealing ring 17 can prevent the hydrogen discharged into the circulating gas pipe from flowing downward into the inflation check valve 10 through the gap between the deflation valve port 202 and the replacement tank 3, thus sealing the deflation process.

[0055] Both provide different sealing effects in different states, but their purpose is to seal the inflation and deflation processes and isolate the inflation and deflation pipelines. This invention enables both simultaneous inflation and deflation at the same port and further enhances the independence of inflation and deflation on the basis of simultaneous inflation and deflation, thus having important safety assurance value.

[0056] Example 4

[0057] Furthermore, considering that the existing valve design cannot effectively filter out particles in the hydrogen cylinder during the venting process, which may lead to blockage and malfunction of the combined valve body and prevent normal hydrogen supply, and may even cause a sharp reduction in the life of the fuel cell after the hydrogen enters the fuel cell, a filter assembly 20 is also installed in the venting process. The specific location is set in the first embedded groove 6 below the shut-off valve 5. It automatically completes filtration as soon as the high-pressure gas enters the combined valve body. The filter element can be made of any material such as stainless steel filter element, titanium powder sintered filter element, glass fiber filter element, and metal sintered filter element. In this embodiment, a metal sintered filter element is specifically selected as the filter element, and the preparation template is a cylindrical mesh, i.e., a metal sintered filter mesh.

[0058] During the sintering process of the metal sintered filter mesh, metal particles are combined into a robust structure in a high-temperature environment, forming a filter mesh with controllable pore size. This allows the metal sintered filter mesh to efficiently capture tiny particles, suspended solids, and other impurities in liquids or gases, achieving a filtration accuracy of up to 0.1 micrometers. Therefore, after the metal sintered filter mesh is installed in the first embedding groove 6, the filtration efficiency for particulate matter and impurities in hydrogen gas reaches over 99%. It can capture not only larger particles but also tiny particles through even finer pores, ensuring that the hydrogen gas flowing through the metal sintered filter mesh is effectively purified. This effectively prevents blockage and malfunction of the combined valve body, guaranteeing a normal hydrogen supply.

[0059] Understandably, the present invention can also install the above-mentioned metal sintered filter assembly 20 inside the vent valve port 202 for filtering the filled hydrogen gas, so as to prevent particulate matter in the hydrogen gas from entering the hydrogen cylinder and affecting the filling and use of the hydrogen cylinder.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A combined valve body built into a gas cylinder, comprising a base (1) and a valve port (2), characterized in that, The valve port (2) is screwed onto the top left side of the base (1) through a replacement groove (3). The mounting groove (4) is provided on the top right side of the base (1). A shut-off valve (5) is installed in the mounting groove (4). The bottom of the base (1) is provided with a first embedding groove (6), a second embedding groove (7) and a third embedding groove (9) in sequence. A two-stage pressure reducing valve (8) is installed in the second embedding groove (7). An inflation check valve (10) is provided in the third embedding groove (9). The inflation check valve (10) includes a body (101), a multi-stage flow port (102) and a one-way blocking component (103). A TPRD pressure relief valve (11) is installed on the top rear side of the base (1). A pressure sensor (12) is embedded on the top front side of the base (1). The valve port (2) is divided into an inflation valve port (201) or an deflation valve port (202), and a straight air passage (23) is provided through the inflation valve port (201). The vent valve port (202) is recessed in the middle and a circulation air passage (13) is provided. The vent valve port (202) has a bottom sealing air passage (14), and the bottom of the bottom sealing air passage (14) extends outward to form a connecting air pipe (15). The connecting air pipe (15) passes through the vent valve port (202) to form multiple air holes (16), and the air holes (16) are located on the circulation air passage (13). The first embedding slot (6), the second embedding slot (7) and the third embedding slot (9) are opened from right to left. The first embedding slot (6) is connected to the mounting slot (4) and the third embedding slot (9) is connected to the replacement slot (3). A low-pressure pipe (18) is connected between the upper left side of the second embedding slot (7) and the replacement slot (3), and a high-pressure pipe (19) is connected between the upper right side of the second embedding slot (7) and the mounting slot (4). A first pipe (21) is provided in the base (1) below the TPRD pressure relief valve (11), and a second pipe (22) is provided in the base (1) below the pressure sensor (12).

2. The combined valve body built into a gas cylinder according to claim 1, characterized in that, The valve port (2) is fitted with a sealing ring (17) at both the bottom and the middle.

3. The combined valve body built into a gas cylinder according to claim 1, characterized in that, The multi-stage flow port (102) is provided through the body (101), and the inner diameter of the multi-stage flow port (102) is set to increase in three steps. A one-way blocking component (103) is provided in the body (101) below the multi-stage flow port (102).

4. A combined valve body built into a gas cylinder according to claim 1, characterized in that, The first embedding slot (6) is provided with a filter component (20).

5. A combined valve body built into a gas cylinder according to claim 1, characterized in that, The shut-off valve (5) has an inverted conical sealing surface (501).

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