Water electrolysis hydrogen production and gas collection device

Abstract

The utility model discloses an electrolytic water hydrogen production and gas collection device which comprises a gas collection tank arranged on a hydrogen production gas pipeline, a gas inlet pipe is arranged at the inlet end of the gas collection tank, a bypass pipe is arranged on one side of the gas inlet pipe, a balance pressure relief device and a safety pressure relief device are sequentially arranged on the bypass pipe in a connected mode, and a piston piece is arranged in the balance pressure relief device in a sliding mode. A plurality of communicating pipelines connected with the safety pressure relief device are arranged on the side wall of the balance pressure relief device, and the piston piece can adjust the opening degree of the communicating pipelines in a sliding mode under the action of air pressure. A valve element is rotationally arranged in the safety pressure relief device, a through hole is formed in the center of the valve element, and a valve plate is vertically arranged in the through hole in a sliding mode. A rotating device for driving the valve core to rotate and a lifting device for driving the valve plate to lift are arranged at the top of the safety pressure relief device; the self-adaptive flow-controllable safety pressure relief valve can perform flow-controllable safety pressure relief on a pipeline in a self-adaptive manner when the pressure in a gas path exceeds a threshold value.

Description

Technical Field

[0001] This utility model belongs to the technical field of pressure relief devices, specifically relating to an electrolytic water hydrogen production and gas collection device. Background Technology

[0002] In the electrolytic hydrogen production process, the oxygen and hydrogen generated are first passed through a gas-liquid separator to separate the water vapor mixed in with the oxygen and hydrogen. The separated gas is then transported through pipelines to subsequent processing equipment or temporary storage tanks. During gas transportation, to ensure safety, the gas pressure in the pipeline needs to be monitored in real time. If the gas pressure inside the pipeline exceeds the limit, it needs to be depressurized promptly. In existing technology, pressure gauges and pressure relief valves are typically installed on the pipeline. The pressure gauge detects the gas pressure inside the pipeline, and if the pressure exceeds the limit, it transmits a signal to an external control terminal, which then controls the pressure relief valve to open for depressurization. However, in actual gas transportation, the gas pressure inside the pipeline fluctuates, causing the pressure to briefly exceed the threshold. In this case, the pressure relief valve will still open, resulting in meaningless depressurization.

[0003] Therefore, in view of the shortcomings of existing pressure relief devices in the hydrogen production and transportation process, which are unable to cope with pressure fluctuations and provide safe and effective pressure relief, this utility model discloses an electrolytic water hydrogen production and collection device. Utility Model Content

[0004] This utility model discloses an electrolytic water hydrogen production and gas collection device, which can adaptively and safely release pressure in the pipeline with controllable flow when the pressure in the gas path exceeds a threshold, and can adapt to pressure fluctuations to avoid meaningless pressure release.

[0005] This utility model is achieved through the following technical solution:

[0006] An electrolytic water hydrogen production and gas collection device includes a gas collection tank connected to a hydrogen production gas pipeline. An inlet pipe is provided at the inlet end of the gas collection tank, and a bypass pipe is provided on one side of the inlet pipe. A pressure relief device and a safety pressure relief device are sequentially connected to the bypass pipe. A piston is slidably installed inside the pressure relief device, and several connecting pipes connected to the safety pressure relief device are provided on the side wall of the pressure relief device. The piston can slide to adjust the opening and closing of the connecting pipes under gas pressure. A valve core is rotatably installed inside the safety pressure relief device, and a through hole is provided at the center of the valve core. A valve plate is vertically slidably installed inside the through hole. A rotating device for rotating the valve core and a lifting device for raising and lowering the valve plate are provided at the top of the safety pressure relief device.

[0007] The gas collecting tank connects to the outlet of the gas-liquid separator or purifier to collect hydrogen gas after gas-liquid separation and purification. When the pressure in the bypass pipe reaches or exceeds a preset value, the piston in the pressure relief device slides under the pressure, thereby opening the connecting pipe to the safety pressure relief device. The greater the pressure inside the bypass pipe, the greater the piston's sliding stroke, resulting in more connecting pipes being opened, thus achieving self-balancing pressure relief. The gas flowing out of the connecting pipe flows to the safety pressure relief device. When the valve core is in its initial position, the axis of the through hole at the center of the valve core is perpendicular to the axis of the airflow direction, meaning the valve core, in its initial position, seals the interior of the safety pressure relief device. When pressure relief is needed, the valve core is rotated, causing the axis of the through hole on the valve core to gradually rotate to be coaxial with the airflow direction. Simultaneously, the valve plate is raised by the lifting device to open the through hole, thereby activating the safety pressure relief device to achieve safe pressure relief. By controlling the lifting height of the valve plate and the rotation angle of the valve core, the opening diameter of the safety pressure relief device is adjusted to achieve pressure relief at a safe flow rate.

[0008] To better realize this utility model, the pressure relief device further includes a first housing with an inlet, an inner cavity inside the first housing, a piston slidably disposed inside the inner cavity, an elastic element disposed at the end of the piston away from the inlet, and an elastic preload adjusting element disposed at the end of the elastic element away from the inlet, with one end of the elastic preload adjusting element abutting against one end of the elastic element; a plurality of connecting pipes are linearly arranged on the shell wall of the first housing, one end of each connecting pipe communicating with the inner cavity, and the other end of each connecting pipe being connected to the safety pressure relief device.

[0009] To better realize this utility model, the elastic preload adjusting component further includes a pressure plate, a connecting cylinder, a screw, and an adjusting motor. The pressure plate is slidably fitted into the inner cavity of the first housing. One end of the pressure plate abuts against the elastic element, and the other end of the pressure plate is fitted with a connecting cylinder. The connecting cylinder is threadedly fitted onto the first end of the screw, and the second end of the screw is connected to the output end of the adjusting motor.

[0010] To better realize this utility model, a sealing element is further provided between the outer side of the piston and the inner wall of the inner cavity.

[0011] To better realize this utility model, the safety pressure relief device further includes a second housing, in which a valve core is rotatably installed.

[0012] To better realize this utility model, the rotating device further includes a rotating motor, a rotating cylinder, a gear ring, and a rotating gear. One section of the rotating cylinder extends into the interior of the second housing and is connected to the top of the valve core. The gear ring is sleeved on the outside of the rotating cylinder. The rotating motor is installed on the outside of the second housing. A rotating gear is sleeved on the output shaft of the rotating motor, and the rotating gear meshes with the gear ring.

[0013] To better realize this utility model, the lifting device further includes a lifting cylinder and a sliding shaft. The sliding shaft is slidably installed inside the rotating cylinder. One end of the sliding shaft is connected to the top of the valve plate. The lifting cylinder is disposed outside the rotating cylinder, and the lifting rod end of the lifting cylinder is connected to the top of the sliding shaft.

[0014] To better realize this utility model, a flow meter is further provided at the outlet end of the second housing.

[0015] To better realize this utility model, pressure gauges are further provided at both the inlet and outlet of the bypass pipe.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] (1) This utility model connects a bypass pipe to one side of the hydrogen gas pipeline and sets a balance pressure relief device and a safety pressure relief device in sequence on the bypass pipe. When the pressure inside the bypass pipe reaches or exceeds the set threshold, the movable piston inside the balance pressure relief device moves adaptively according to the pressure magnitude under the pressure to open the connecting pipeline, so that the gas can safely and smoothly enter the safety pressure relief device. Then, the rotation angle of the valve core inside the safety pressure relief device is adjusted by the rotation device, and the lifting height of the valve plate inside the valve core is adjusted by the lifting device, thereby adjusting the opening of the entire safety pressure relief device to achieve quantitative and stable pressure relief. Finally, when the pressure inside the pipeline exceeds the standard, the pressure relief is adaptive, safe and stable.

[0018] (2) By setting an elastic element on one side of the piston, when the pressure fluctuation inside the bypass pipe exceeds the threshold for a short time, the piston will not immediately slide open the connecting pipe under the pressure due to the elastic force of the elastic element. Only after the pressure inside the bypass pipe exceeds the threshold for a certain period of time will the pressure drive the piston to slide to the position to open the connecting pipe, thereby achieving adaptive and stable pressure relief, thus avoiding the occurrence of meaningless pressure relief under short-term pressure fluctuation. Attached Figure Description

[0019] Figure 1 A cross-sectional schematic diagram of a photovoltaic hydrogen production and gas collection device;

[0020] Figure 2This is a schematic diagram of the external structure of a photovoltaic hydrogen production and gas collection device.

[0021] Figure 3 This is a left view of a photovoltaic hydrogen production and collection device.

[0022] Figure 4 for Figure 3 Sectional view along axis AA;

[0023] Figure 5 This is a schematic diagram of the installation of the valve core and valve plate.

[0024] Wherein: 1-Bypass pipe; 2-Balanced pressure relief device; 3-Safety pressure relief device; 4-Rotating device; 5-Lifting device; 21-Piston component; 22-Elastic component; 23-Elastic preload adjusting component; 31-Valve core; 32-Valve plate; 41-Rotating motor; 42-Rotating cylinder; 43-Gear ring; 44-Rotating gear; 51-Lifting cylinder; 52-Sliding shaft; 100-First housing; 200-Second housing; 300-Connecting pipe; 400-Gas collection tank; 231-Pressure plate; 232-Connecting cylinder; 233-Screw; 234-Adjusting motor. Detailed Implementation

[0025] Example 1:

[0026] This embodiment provides a water electrolysis hydrogen production and gas collection device, such as... Figures 1-4 As shown, the device includes a gas collecting tank 400 connected to a hydrogen production gas pipeline. The gas collecting tank 400 has an inlet pipe at its inlet end, and a bypass pipe 1 is provided on one side of the inlet pipe. A pressure relief device 2 and a safety pressure relief device 3 are sequentially connected to the bypass pipe 1. A piston 21 is slidably mounted inside the pressure relief device 2. Several connecting pipes 300 connected to the safety pressure relief device 3 are provided on the side wall of the pressure relief device 2. The piston 21 can slide to adjust the opening and closing of the connecting pipes 300 under gas pressure. A valve core 31 is rotatably mounted inside the safety pressure relief device 3. A through hole is provided at the center of the valve core 31, and a valve plate 32 is vertically slidably mounted inside the through hole. A rotating device 4 that drives the valve core 31 to rotate, and a lifting device 5 that drives the valve plate 32 to rise and fall, are provided on the top of the safety pressure relief device 3.

[0027] The gas collecting tank 400 is connected to the outlet of the gas-liquid separator or purifier to collect hydrogen gas after gas-liquid separation and purification. When the pressure inside the bypass pipe 1 is lower than a set threshold, the piston 21 inside the balancing pressure relief device 2 is in its initial position to block the inlets of all connecting pipes 300. When the pressure inside the bypass pipe 1 reaches and exceeds the set threshold, the piston 21 inside the balancing pressure relief device 2 slides under the gas pressure, thereby opening the inlets of the connecting pipes 300, allowing gas to flow through the connecting pipes 300 to the safety pressure relief device 3. The greater the pressure inside the bypass pipe 1, the greater the force acting on one end of the piston 21, resulting in a larger sliding stroke of the piston 21, and ultimately opening more connecting pipes 300. This achieves rapid balancing pressure relief by adaptively opening more connecting pipes 300 as the pressure increases.

[0028] Gas flows through connecting pipe 300 to safety relief device 3. Based on the pressure inside bypass pipe 1, rotating device 4 drives valve core 31 to rotate, making the through hole at the center of valve core 31 coaxial with the airflow direction inside safety relief device 3, at which point valve core 31 is at its maximum opening. Simultaneously, lifting device 5 lifts valve plate 32 in the through hole to open the through hole, allowing gas to safely flow through safety relief device 3 for safe pressure relief. By adjusting the rotation angle of valve core 31 and the lifting height of valve plate 32, the gas flow rate at the through hole is adjusted. This flow rate corresponds to the gas pressure inside bypass pipe 1; that is, the higher the pressure, the greater the required flow rate.

[0029] Furthermore, pressure gauges are installed at both the inlet and outlet of the bypass pipe 1. The inlet of the bypass pipe 1 is connected to the gas outlet of the hydrogen-water separator, and the outlet of the bypass pipe 1 is connected to an external gas storage tank. By installing pressure gauges at the inlet and outlet of the bypass pipe 1, the pressure at the inlet and outlet of the bypass pipe 1 can be monitored in real time, and it can be determined whether the depressurization process at the bypass pipe 1 is abnormal.

[0030] Example 2:

[0031] This embodiment discloses an electrolytic water hydrogen production and gas collection device, which is an improvement on Embodiment 1, such as... Figure 1 , Figure 2 , Figure 4As shown, the pressure relief device 2 includes a first housing 100 with an inlet. The first housing 100 has an inner cavity. A piston 21 is slidably disposed inside the inner cavity. An elastic element 22 is disposed at the end of the piston 21 away from the inlet. An elastic preload adjusting element 23 is disposed at the end of the elastic element 22 away from the inlet. One end of the elastic preload adjusting element 23 abuts against one end of the elastic element 22. A plurality of connecting pipes 300 are linearly arranged on the shell wall of the first housing 100. One end of the connecting pipe 300 is connected to the inner cavity, and the other end of the connecting pipe 300 is connected to the safety pressure relief device 3.

[0032] The piston 21 is pre-tightened by the elastic element 22. When the gas pressure in the bypass pipe 1 reaches or exceeds a set threshold, the gas enters the inner cavity through the inlet of the first housing 100 and the pressure exerted on one end of the piston 21 is greater than the elastic force of the elastic element 22, thereby causing the piston 21 to slide inside the first housing 100. The sliding of the piston 21 opens the connecting pipe 300. The greater the pressure, the greater the sliding stroke of the piston 21, and the more connecting pipes 300 are opened, thus achieving the function of faster pressure relief with greater pressure through self-balancing. The elastic pre-tightening force adjusting element 23 can adjust the degree of compression of the elastic element 22, thereby adjusting the initial elastic force of the elastic element 22, and thus controlling the threshold at which the piston 21 can slide under gas pressure.

[0033] Furthermore, a sealing element is provided between the outer side of the piston component 21 and the inner wall of the inner cavity. Several annular grooves are provided on the outer side of the piston component 21, and an annular sealing ring is provided inside the annular grooves. By providing the annular sealing ring, the sealing between the piston component 21 and the inner cavity is ensured during the sliding process, ensuring that the gas can only flow from the open connecting pipe 300 to the safety pressure relief device 3.

[0034] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.

[0035] Example 3:

[0036] This embodiment discloses an electrolytic water hydrogen production and gas collection device, which is optimized based on Embodiment 1 or 2, such as... Figure 4 As shown, the elastic preload adjusting component 23 includes a pressure plate 231, a connecting cylinder 232, a screw 233, and an adjusting motor 234. The pressure plate 231 is slidably fitted into the inner cavity of the first housing 100. One end of the pressure plate 231 abuts against the elastic component 22, and the other end of the pressure plate 231 is fitted with the connecting cylinder 232. The connecting cylinder 232 is threadedly fitted onto the first end of the screw 233, and the second end of the screw 233 is connected to the output end of the adjusting motor 234.

[0037] The second end of the screw 233 can be directly connected to the output end of the adjusting motor 234, or it can be connected through a transmission connection structure such as a gear set. A limiting boss is provided inside the inlet of the first housing 100 to limit the sliding position of the piston 21. When the preload of the elastic element 22 needs to be adjusted, the adjusting motor 234 drives the screw 233 to rotate. This, in turn, through the mating structure between the screw 233 and the internal thread of the connecting cylinder 232, moves the connecting cylinder 232 and the pressure plate 231 toward the elastic element 22. The pressure plate 231 applies pressure to the elastic element 22, adjusting the degree of compression of the elastic element 22, and thus adjusting the preload of the elastic element 22 on the piston 21. It should be noted that, to prevent the connecting cylinder 232 from rotating, an axial guide groove is provided on the inner wall of the inner cavity of the first housing 100. The outer wall of the connecting cylinder 232 is slidably connected to the axial guide groove via a retaining strip, allowing the connecting cylinder 232 to move linearly under the drive of the screw 233 but not to rotate circumferentially.

[0038] It should be noted that, in order to ensure the safety of gas transportation in the hydrogen production process, the aforementioned pressure plate 231, connecting cylinder 232, screw 233 and other driving components are made of plastic materials, and an explosion-proof insulating cover is installed on the outside of the regulating motor 234 to avoid sparks.

[0039] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.

[0040] Example 4:

[0041] This embodiment discloses an electrolytic water hydrogen production and gas collection device, which is optimized based on any one of embodiments 1-3, such as... Figure 5 As shown, the safety pressure relief device 3 includes a second housing 200, in which a valve core 31 is rotatably mounted. The rotating device 4 includes a rotating motor 41, a rotating cylinder 42, a gear ring 43, and a rotating gear 44. One section of the rotating cylinder 42 extends into the interior of the second housing 200 and connects to the top of the valve core 31. The gear ring 43 is sleeved on the outside of the rotating cylinder 42. The rotating motor 41 is mounted on the outside of the second housing 200, and the rotating gear 44 is sleeved on the output shaft of the rotating motor 41. The rotating gear 44 meshes with the gear ring 43. The lifting device 5 includes a lifting cylinder 51 and a sliding shaft 52. The sliding shaft 52 is slidably mounted inside the rotating cylinder 42. One end of the sliding shaft 52 is connected to the top of the valve plate 32. The lifting cylinder 51 is located outside the rotating cylinder 42, and the lifting rod end of the lifting cylinder 51 is connected to the top of the sliding shaft 52.

[0042] When valve core 31 is in its initial position, the axis of the through hole at the center of valve core 31 is perpendicular to the axis of the inner cavity of the second housing 200 at a 90-degree angle. At this time, valve core 31 completely seals the inner cavity of the second housing 200, preventing gas from flowing through it. When pressure relief is required, the rotary motor 41 drives the rotary gear 44 to rotate, which in turn drives the rotary cylinder 42 to rotate through the meshing structure between the rotary gear 44 and the gear ring 43. Finally, the rotary cylinder 42 drives valve core 31 to rotate to its final position, until the axis of the through hole on valve core 31 is coaxial with the axis of the inner cavity of the second housing 200. Furthermore, the rotary motor 41 can drive valve core 31 to rotate to any position between the initial and final positions. Preferably, the rotary motor 41 can drive valve core 31 to rotate to positions where the angle between the axis of the through hole and the axis of the inner cavity of the second housing 200 is 0°, 30°, 45°, 60°, 75°, or 90°, thereby adjusting the flow rate of the through hole inside the second housing 200. Simultaneously, the lifting cylinder 51 drives the sliding shaft 52 to rise, which in turn drives the valve plate 32 to rise, opening the through hole. By controlling the rising height of the sliding shaft 52, the degree to which the valve plate 32 opens the through hole is adjusted. Ultimately, by coordinating the rotation angle of the valve core 31 and the rising height of the valve plate 32, the opening degree of the inner cavity of the second housing 200 is comprehensively controlled, achieving safe and stable pressure relief.

[0043] It should be noted that, in order to ensure the safety of gas transportation in the hydrogen production process, the aforementioned driving components such as the rotating cylinder 42, gear ring 43, rotating gear 44, and sliding shaft 52 are made of plastic materials, and explosion-proof insulating covers are installed on the outside of the rotating motor 41 and the lifting cylinder 51 to avoid sparks.

[0044] Furthermore, a flow meter is provided at the outlet of the second housing 200. The flow meter monitors the gas flow rate through the second housing 200 in real time, and controls the opening degree of the valve core 31 and valve plate 32 based on the real-time flow rate.

[0045] The rest of this embodiment is the same as any one of embodiments 1-3, so it will not be described again.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A hydrogen collection device for water electrolysis, comprising a gas collection tank (400) connected to a hydrogen production gas pipeline, characterized in that, The gas collection tank (400) is provided with an air inlet pipe at its inlet end. A bypass pipe (1) is provided on one side of the air inlet pipe. A pressure relief device (2) and a safety pressure relief device (3) are connected in sequence on the bypass pipe (1). A piston (21) is slidably provided inside the pressure relief device (2). Several connecting pipes (300) connected to the safety pressure relief device (3) are provided on the side wall of the pressure relief device (2). The piston (21) can slide to adjust the opening and closing of the connecting pipes (300) under the action of air pressure. A valve core (31) is rotatably provided inside the safety pressure relief device (3). A through hole is provided at the center of the valve core (31). A valve plate (32) is vertically slidably provided inside the through hole. A rotating device (4) that drives the valve core (31) to rotate and a lifting device (5) that drives the valve plate (32) to rise and fall are provided on the top of the safety pressure relief device (3).

2. The electrolytic water hydrogen production and gas collection device according to claim 1, characterized in that, The pressure relief device (2) includes a first housing (100) with an inlet. The first housing (100) has an inner cavity. A piston (21) is slidably disposed inside the inner cavity. An elastic element (22) is disposed at the end of the piston (21) away from the inlet. An elastic preload adjustment element (23) is disposed at the end of the elastic element (22) away from the inlet. One end of the elastic preload adjustment element (23) abuts against one end of the elastic element (22). A plurality of connecting pipes (300) are linearly arranged on the outer wall of the first housing (100). One end of the connecting pipe (300) is connected to the inner cavity, and the other end of the connecting pipe (300) is connected to the safety pressure relief device (3).

3. The electrolytic water hydrogen production and gas collection device according to claim 2, characterized in that, The elastic preload adjusting component (23) includes a pressure plate (231), a connecting cylinder (232), a screw (233), and an adjusting motor (234). The pressure plate (231) is slidably fitted in the inner cavity of the first housing (100). One end of the pressure plate (231) abuts against the elastic component (22), and the other end of the pressure plate (231) is fitted with a connecting cylinder (232). The connecting cylinder (232) is threadedly fitted onto the first end of the screw (233), and the second end of the screw (233) is connected to the output end of the adjusting motor (234).

4. The electrolytic water hydrogen production and gas collection device according to claim 3, characterized in that, A sealing element is provided between the outer side of the piston (21) and the inner wall of the inner cavity.

5. A hydrogen collection device for electrolysis of water according to any one of claims 1-4, characterized in that, The safety pressure relief device (3) includes a second housing (200), in which a valve core (31) is rotatably mounted.

6. The electrolytic water hydrogen production and gas collection device according to claim 5, characterized in that, The rotating device (4) includes a rotating motor (41), a rotating cylinder (42), a gear ring (43), and a rotating gear (44). One end of the rotating cylinder (42) extends into the interior of the second housing (200) and is connected to the top of the valve core (31). The gear ring (43) is sleeved on the outside of the rotating cylinder (42). The rotating motor (41) is installed on the outside of the second housing (200). The rotating gear (44) is sleeved on the output shaft of the rotating motor (41). The rotating gear (44) meshes with the gear ring (43).

7. The electrolytic water hydrogen production and gas collection device according to claim 6, characterized in that, The lifting device (5) includes a lifting cylinder (51) and a sliding shaft (52). The sliding shaft (52) is slidably installed inside the rotating cylinder (42). One end of the sliding shaft (52) is connected to the top of the valve plate (32). The lifting cylinder (51) is located outside the rotating cylinder (42). The lifting rod end of the lifting cylinder (51) is connected to the top of the sliding shaft (52).

8. The electrolytic water hydrogen production and gas collection device according to claim 7, characterized in that, A flow meter is provided at the outlet of the second housing (200).

9. A hydrogen collection device for electrolysis of water according to any one of claims 1-4, characterized in that, Pressure gauges are installed at both the inlet and outlet of the bypass pipe (1).

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