Pressure balance valve for water electrolysis hydrogen production device, control method of pressure balance valve and water electrolysis hydrogen production device comprising pressure balance valve

Abstract

The invention discloses a pressure balance valve for a water electrolysis hydrogen production device, a control method of the pressure balance valve and the water electrolysis hydrogen production device comprising the pressure balance valve. The pressure balance valve comprises a hydrogen side pressure balance valve assembly, an oxygen side pressure balance valve assembly and a valve element (3). The pressure balance valve which can be automatically adjusted according to pressure changes is adopted, the pressure balance valve is coupled with the hydrogen pressure storage tank, the oxygen pressure storage tank, the oxygen-liquid separator and the hydrogen-liquid separator, the liquid level of the gas-liquid separator is rapidly balanced, and the influence of liquid level imbalance of the gas-liquid separator on an electrolysis system is avoided. Specifically, the pressure balance valve comprises a hydrogen side pressure balance valve assembly, an oxygen side pressure balance valve assembly and a valve element (3), under the action of the pressure difference, the pressure balance valve adjusts the hydrogen pressure storage tank and the oxygen pressure storage tank, hydrogen and oxygen are released into the hydrogen-liquid separator and the oxygen-liquid separator through pipelines, and therefore the pressure is rapidly balanced.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure balancing valves, and in particular to a rapid pressure balancing valve for a water electrolysis hydrogen production device, a control method thereof, and a water electrolysis hydrogen production device comprising the valve. Background Art

[0002] Hydrogen production technology by water electrolysis has attracted much attention due to its environmental friendliness and energy sustainability. As the core equipment for hydrogen production by water electrolysis, the electrolyzer electrolyzes water into hydrogen and oxygen through electrolysis. However, in actual operation, the gas-liquid mixture produced by the electrolyzer faces a series of technical challenges in the gas-liquid separation process.

[0003] In the process of producing hydrogen by electrolysis of water, the electrolyzer electrolyzes water into hydrogen and oxygen under power conditions, and produces a certain amount of electrolyte at the same time. These gas-liquid mixtures then flow into the gas-liquid separation device through a pipeline, and pure hydrogen and oxygen are obtained after separation. However, due to the different production of hydrogen and oxygen during the electrolysis process, this leads to an imbalance in the liquid level of the gas-liquid separator. Liquid level imbalance in the gas-liquid separator is a common and thorny problem in the process of producing hydrogen by electrolysis of water. Due to the different production of hydrogen and oxygen, the liquid level of the gas-liquid separator will change accordingly. The liquid level on the side with higher hydrogen production rises, while the liquid level on the side with lower oxygen production drops. This liquid level imbalance will cause a pressure difference between the hydrogen and oxygen sides of the electrolysis equipment, affecting the electrolysis work and endangering the safety of the electrolyzer.

[0004] First, the pressure difference will affect the distribution and flow of the electrolyte in the electrolytic cell, which may lead to uneven distribution of the electrolyte and affect the electrolysis efficiency. Secondly, the pressure difference may also threaten the sealing and safety of the electrolytic cell, increasing the risk of leakage and explosion of the electrolytic cell. In addition, the long-term pressure difference may also damage the structure and materials of the electrolytic cell and shorten its service life.

[0005] In order to solve the problem of unbalanced liquid level in the gas-liquid separator during the process of hydrogen production by electrolysis of water, the traditional adjustment method uses hydrogen and oxygen pressure difference sensors to measure the liquid level of the hydrogen and oxygen liquid separators. After processing the signal, the liquid level is finally adjusted by controlling the opening and closing of the valve. However, this method requires multiple signal conversions, during which the signal is easily distorted, and the reaction to liquid level changes is not sensitive enough. The pressure difference caused by the unbalanced liquid level cannot be directly used as a power to adjust the liquid level balance. Therefore, in order to solve the problem of unbalanced liquid level in the gas-liquid separator during the process of hydrogen production by electrolysis of water, and to improve the operating stability and safety of the electrolysis equipment, it is necessary to carry out technological innovation. This patent is proposed in this context, aiming to solve the above problems through technological innovation, improve the operating stability and safety of the electrolysis equipment by overcoming the problem of liquid level imbalance in the gas-liquid separator, and provide new solutions for the development of hydrogen production technology by electrolysis of water.

[0006] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide a valve for rapid pressure balance of a water electrolysis hydrogen production device in view of the deficiencies in the prior art, so as to solve the pressure difference problem caused by different liquid levels caused by pressure changes in a gas-liquid separator.

[0008] In order to achieve the above-mentioned purpose, the technical solution of the patent of the present invention is: a two-position six-way pressure balancing valve and its external pipeline structure, which includes: a hydrogen pressure storage tank, an oxygen pressure storage tank, an oxygen liquid separator, a hydrogen liquid separator, a pressure balancing valve, and a connecting pipeline; the pressure balancing valve can quickly achieve the balance of hydrogen and oxygen liquid levels. When the pressure imbalance in the hydrogen liquid separator and the oxygen liquid separator causes a pressure difference between the hydrogen liquid separator and the oxygen liquid separator, resulting in an imbalance in the liquid level height in the hydrogen liquid separator and the oxygen liquid separator, under the action of the pressure difference, the pressure balancing valve adjusts the hydrogen pressure storage tank and the oxygen pressure storage tank to release hydrogen and oxygen into the hydrogen liquid separator and the oxygen liquid separator, and quickly lowers the liquid level.

[0009] The present invention provides a rapid pressure balancing valve for a water electrolysis hydrogen production device and a control method thereof, the valve comprising: a hydrogen pressure storage tank, an oxygen pressure storage tank, an oxygen liquid separator, a hydrogen liquid separator, a pressure balancing valve, and a connecting pipeline. Under the action of the pressure difference, the pressure balancing valve adjusts the hydrogen pressure storage tank and the oxygen pressure storage tank, and releases hydrogen and oxygen into the hydrogen liquid separator and the oxygen liquid separator through the pipeline to quickly balance the pressure.

[0010] The present invention is achieved through the following technical solutions:

[0011] A first aspect of the present invention provides a pressure balancing valve for a water electrolysis hydrogen production device, the pressure balancing valve comprising a hydrogen side pressure balancing valve assembly and an oxygen side pressure balancing valve assembly and a valve core 3;

[0012] The hydrogen side pressure balance valve assembly comprises a hydrogen side spring 1, a hydrogen side piston 2, a hydrogen gas-liquid separator pressure airway 4, a first hydrogen chamber 5, a hydrogen gas-liquid separator regulating airway 6, a hydrogen pressure storage tank regulating airway 7, and a second hydrogen chamber 8;

[0013] The oxygen side pressure balance valve assembly includes an oxygen liquid separator regulating airway 9, a second oxygen chamber 10, an oxygen pressure storage tank regulating airway 11, an oxygen liquid separator pressure airway 12, a first oxygen chamber 13, an oxygen side piston 14, and an oxygen side spring 15;

[0014] The hydrogen-liquid separator pressure airway 4, the hydrogen-liquid separator regulating airway 6, the hydrogen pressure storage tank regulating airway 7, the oxygen-liquid separator regulating airway 9, the oxygen pressure storage tank regulating airway 11, and the oxygen-liquid separator pressure airway 12 are all connected to external pipelines;

[0015] The first hydrogen chamber 5 is in gas communication with the hydrogen-liquid separator pressure gas passage 4, and hydrogen enters the first hydrogen chamber 5 through the hydrogen-liquid separator pressure gas passage 4, and generates a pressure difference to drive the valve core 3 to move, thereby realizing the opening and closing of the oxygen flow passage formed by the oxygen-liquid separator regulating gas passage 9, the second oxygen chamber 10, and the oxygen pressure storage tank regulating gas passage 11, and the size of the oxygen flow passage;

[0016] The oxygen-liquid separator pressure gas passage 12 is in gas communication with the first oxygen chamber 13, and oxygen enters the first oxygen chamber 13 through the oxygen-liquid separator pressure gas passage 12, and generates a pressure difference to drive the valve core 3 to move, thereby realizing the opening and closing of the hydrogen flow passage formed by the hydrogen-liquid separator regulating gas passage 6, the second hydrogen chamber 8, and the hydrogen pressure storage tank regulating gas passage 7, and the size of the hydrogen flow passage.

[0017] Preferably, when hydrogen flows into the first hydrogen chamber 5 through the hydrogen-liquid separator pressure channel 4 , pressure in the direction toward the oxygen side is generated.

[0018] Preferably, when oxygen flows into the first oxygen chamber 13 through the oxygen-liquid separator pressure air passage 12, pressure in the direction toward the hydrogen side is generated.

[0019] Preferably, the valve core 3 controls the opening and closing and size of the oxygen-liquid separator regulating airway 9 and the oxygen pressure storage tank regulating airway 11 under the action of the pressure difference generated by the first hydrogen chamber 5 and the second hydrogen chamber 8 .

[0020] Preferably, the valve core 3 controls the opening and closing and size of the hydrogen-liquid separator regulating gas channel 6 and the hydrogen pressure storage tank regulating gas channel 7 under the action of the pressure difference generated by the first oxygen chamber 13 and the second oxygen chamber 10 .

[0021] Preferably, the first hydrogen chamber 5, the hydrogen-liquid separator pressure air channel 4, the second hydrogen chamber 8, the second oxygen chamber 10, the first oxygen chamber 13, the hydrogen-liquid separator regulating air channel 6, the hydrogen pressure storage tank regulating air channel 7, the oxygen-liquid separator regulating air channel 9, the oxygen pressure storage tank regulating air channel 11, and the oxygen-liquid separator pressure air channel 12 are separated by the valve core 3 to avoid cross-talk between hydrogen and oxygen.

[0022] Preferably, in the case where the overall size of the pressure balancing valve does not change, to increase the speed at which the pressure balancing valve regulates pressure, the sizes of the first hydrogen chamber 5 and the first oxygen chamber 13 need to be increased, the valve core 3 becomes compact, and the size of the flow channel cavity through which the hydrogen and oxygen gases flow becomes smaller; to reduce the speed at which the pressure balancing valve regulates pressure, the sizes of the first hydrogen chamber 5 and the first oxygen chamber 13 need to be reduced, the valve core 3 becomes bulky, and the size of the flow channel cavity through which the hydrogen and oxygen gases flow becomes larger.

[0023] Preferably, the presence of the hydrogen side spring 1 and the oxygen side spring 15 prevents the valve core 3 from moving arbitrarily under a small pressure difference. Adjusting the elastic force and the pulling force of the hydrogen side spring 1 and the oxygen side spring 15 can be used to set the initial value of the force pushing the valve core 3 to move and the speed of the valve core movement, thereby making the pressure balance valve controllable.

[0024] Preferably, the hydrogen side spring 1 has a hydrogen side stopper 16 on its outer side, and the oxygen side spring 15 has an oxygen side stopper 17 on its outer side. The hydrogen side stopper 16 and the oxygen side stopper 17 play a limiting role to prevent the valve core from excessive movement and damaging the pressure balancing valve.

[0025] Preferably, the pressure balancing valve has a left end cover 18 and a right end cover 19, and the left end cover 18 and the right end cover 19 respectively serve to fix the hydrogen side spring 1 and the oxygen side spring 15 .

[0026] The second aspect of the present invention provides a control method for the pressure balancing valve according to the first aspect of the present invention, when hydrogen flows into the hydrogen gas-liquid separator pressure gas passage 4, pressure is generated in the first hydrogen chamber 5 to push the valve core 3 to move, so that the oxygen liquid separator regulating gas passage 9 and the oxygen pressure storage tank regulating gas passage 11 are connected through the second oxygen chamber 10, and oxygen flows through the second oxygen chamber 10, so that the oxygen pressure storage tank releases oxygen toward the oxygen liquid separator;

[0027] When oxygen flows into the oxygen-liquid separator pressure air channel 12, pressure is generated in the first oxygen chamber 13 to push the valve core 3 to move, so that the hydrogen-liquid separator regulating air channel 6 and the hydrogen pressure storage tank regulating air channel 7 are connected through the second hydrogen chamber 8, and hydrogen flows through the second hydrogen chamber 8, so that the hydrogen pressure storage tank releases hydrogen toward the hydrogen-liquid separator.

[0028] The third aspect of the present invention provides a water electrolysis hydrogen production device comprising the pressure balancing valve described in the first aspect of the present invention, comprising a hydrogen side liquid level gauge N1, a hydrogen gas-liquid separator N2, a hydrogen discharge pipe N3, a hydrogen side alkali liquid circulation pipeline N4, a hydrogen gas-liquid separator air supply pipe N5, a hydrogen gas-liquid separator pressure pipe N6, a pressure balancing valve N7, a hydrogen pressure storage tank N8, a hydrogen pressure storage tank air supply pipe N9, a ball valve N10, an oxygen pressure storage tank air supply pipe N11, an oxygen pressure storage tank N12, an oxygen-liquid separator pressure pipe N13, an oxygen-liquid separator air supply pipe N14, an oxygen discharge pipe N15, an oxygen-liquid separator N16, an oxygen side alkali liquid circulation pipeline N17, and an oxygen side liquid level gauge N18;

[0029] The pressure imbalance between the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16 causes a pressure difference between the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16. The hydrogen side liquid level gauge N1 and the oxygen side liquid level gauge N18 measure the liquid level height imbalance in the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16. Under the action of the pressure difference, the gas flows into the pressure balance valve N7 through the hydrogen gas-liquid separator pressure pipe N6 and the oxygen liquid separator pressure pipe N13 to push the valve core to move. , open the regulating air passage, and the gas in the hydrogen pressure storage tank N8 and the oxygen pressure storage tank N12 is replenished toward the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16 with high liquid levels through the hydrogen pressure storage tank air supply pipe N9, the oxygen pressure storage tank air supply pipe N11, the hydrogen gas-liquid separator air supply pipe N5, and the oxygen liquid separator air supply pipe N14, so that the liquid flows out of the separator through the hydrogen side alkali liquid circulation pipeline N4 and the oxygen side alkali liquid circulation pipeline N17, thereby lowering the liquid level.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention adopts a pressure balancing valve that can be automatically adjusted according to pressure changes, coupled with a hydrogen pressure storage tank, an oxygen pressure storage tank, an oxygen liquid separator, and a hydrogen gas-liquid separator, and quickly balances the liquid level of the gas-liquid separator, thereby avoiding the impact of the gas-liquid separator liquid level imbalance on the electrolysis system. Specifically, the pressure balancing valve includes a hydrogen side pressure balancing valve assembly and an oxygen side pressure balancing valve assembly and a valve core 3. Under the action of the pressure difference, the pressure balancing valve adjusts the hydrogen pressure storage tank and the oxygen pressure storage tank, and releases hydrogen and oxygen into the hydrogen gas-liquid separator and the oxygen gas-liquid separator through the pipeline to quickly balance the pressure.

[0032] 2. The valve body, valve core and spring of the pressure balancing valve of the present invention cooperate with each other to make the whole system simple and efficient. The pressure balancing valve includes a valve body, a valve core, a piston and a spring; the valve body has six air passages connected to the external pipeline, of which the outermost air passage is used to enter hydrogen and oxygen, generating different pressure differences to drive the valve core to move left and right; the middle four air passages are used to add gas to the hydrogen liquid separator and the oxygen liquid separator to balance the pressure in the separator; behind the pistons on both sides are the air chamber filled with hydrogen and the pressure air chamber filled with oxygen, the pressure air chamber receives the gas flowing into the hydrogen and oxygen passages, generates pressure to push the valve core to move; between the two air chambers are two flow channel chambers through which hydrogen and oxygen gases flow, and the movement of the valve core determines the opening and closing of the flow channel and the size of the flow channel.

[0033] 3. The structure of the valve core and valve body of the pressure balancing valve of the present invention determines the volume of the pressure gas chamber and the position of the airway for replenishing gas to the hydrogen gas-liquid separator and the oxygen gas-liquid separator, and different pressure chamber sizes and airway positions determine the speed at which the pressure balancing valve balances the pressure. If the overall size of the pressure balancing valve does not change, to increase the speed at which the pressure balancing valve balances the pressure, it is necessary to increase the size of the pressure chamber, the valve core becomes compact, and the flow channel cavity through which the hydrogen and oxygen gases flow becomes smaller; to reduce the speed at which the pressure balancing valve balances the pressure, it is necessary to reduce the size of the pressure chamber, the valve core becomes bulky, and the flow channel cavity through which the hydrogen and oxygen gases flow becomes larger.

[0034] 4. The spring of the pressure balance valve of the present invention prevents the valve core from moving at will under a small pressure difference. By adjusting the elastic force and tension of the spring, the initial value of the pressure that pushes the valve core to move and the speed of the valve core movement can be set to change the regulating capacity of the pressure balance valve. At the same time, when the pressure difference is too large, the spring will play a limiting role to prevent the valve core from excessive movement and damaging the pressure balance valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram of a fast pressure balancing valve for a water electrolysis hydrogen production device;

[0036] Figure 2 This is a schematic diagram of valve adjustment when the pressure on the hydrogen side is high;

[0037] Figure 3 This is a schematic diagram of valve adjustment when the pressure on the oxygen side is higher;

[0038] Figure 4 It is a flow chart of hydrogen and oxygen pressure balance regulation.

[0039] Names of the reference numerals in the description of the drawings: hydrogen side spring 1, hydrogen side piston 2, valve core 3, hydrogen liquid separator pressure airway 4, first hydrogen chamber 5, hydrogen liquid separator regulating airway 6, hydrogen pressure storage tank regulating airway 7, second hydrogen chamber 8, oxygen liquid separator regulating airway 9, second oxygen chamber 10, oxygen pressure storage tank regulating airway 11, oxygen liquid separator pressure airway 12, first oxygen chamber 13, oxygen side piston 14, oxygen side spring 15, hydrogen side stopper 16, oxygen side stopper 17, left end cover 18, right end cover 19;

[0040] Hydrogen side liquid level gauge N1, hydrogen gas-liquid separator N2, hydrogen discharge pipe N3, hydrogen side alkali liquid circulation pipeline N4, hydrogen gas-liquid separator air supply pipe N5, hydrogen gas-liquid separator pressure pipe N6, pressure balance valve N7, hydrogen pressure storage tank N8, hydrogen pressure storage tank air supply pipe N9, ball valve N10, oxygen pressure storage tank air supply pipe N11, oxygen pressure storage tank N12, oxygen liquid separator pressure pipe N13, oxygen liquid separator air supply pipe N14, oxygen discharge pipe N15, oxygen liquid separator N16, oxygen side alkali liquid circulation pipeline N17, oxygen side liquid level gauge N18. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with embodiments.

[0042] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0043] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used herein may include wireless connections.

[0044] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0046] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0047] Example

[0048] This embodiment is a pressure balancing valve for a water electrolysis hydrogen production device, the pressure balancing valve comprising a hydrogen side pressure balancing valve assembly and an oxygen side pressure balancing valve assembly and a valve core 3;

[0049] The hydrogen side pressure balance valve assembly comprises a hydrogen side spring 1, a hydrogen side piston 2, a hydrogen gas-liquid separator pressure airway 4, a first hydrogen chamber 5, a hydrogen gas-liquid separator regulating airway 6, a hydrogen pressure storage tank regulating airway 7, and a second hydrogen chamber 8;

[0050] The oxygen side pressure balance valve assembly includes an oxygen liquid separator regulating airway 9, a second oxygen chamber 10, an oxygen pressure storage tank regulating airway 11, an oxygen liquid separator pressure airway 12, a first oxygen chamber 13, an oxygen side piston 14, and an oxygen side spring 15;

[0051] The hydrogen-liquid separator pressure airway 4, the hydrogen-liquid separator regulating airway 6, the hydrogen pressure storage tank regulating airway 7, the oxygen-liquid separator regulating airway 9, the oxygen pressure storage tank regulating airway 11, and the oxygen-liquid separator pressure airway 12 are all connected to external pipelines;

[0052] The first hydrogen chamber 5 is in gas communication with the hydrogen-liquid separator pressure gas passage 4, and hydrogen enters the first hydrogen chamber 5 through the hydrogen-liquid separator pressure gas passage 4, and generates a pressure difference to drive the valve core 3 to move, thereby realizing the opening and closing of the oxygen flow passage formed by the oxygen-liquid separator regulating gas passage 9, the second oxygen chamber 10, and the oxygen pressure storage tank regulating gas passage 11, and the size of the oxygen flow passage;

[0053] The oxygen-liquid separator pressure gas passage 12 is in gas communication with the first oxygen chamber 13, and oxygen enters the first oxygen chamber 13 through the oxygen-liquid separator pressure gas passage 12, and generates a pressure difference to drive the valve core 3 to move, thereby realizing the opening and closing of the hydrogen flow passage formed by the hydrogen-liquid separator regulating gas passage 6, the second hydrogen chamber 8, and the hydrogen pressure storage tank regulating gas passage 7, and the size of the hydrogen flow passage.

[0054] When hydrogen flows into the first hydrogen chamber 5 through the hydrogen-liquid separator pressure channel 4, pressure in the direction toward the oxygen side is generated.

[0055] The oxygen-liquid separator pressure air passage 12 allows oxygen to flow into the first oxygen chamber 13, which will generate pressure in the direction of the hydrogen side.

[0056] The valve core 3 controls the opening and closing and size of the oxygen-liquid separator regulating gas channel 9 and the oxygen pressure storage tank regulating gas channel 11 under the action of the pressure difference generated by the first hydrogen chamber 5 and the second hydrogen chamber 8.

[0057] The valve core 3 controls the opening and closing and size of the hydrogen-liquid separator regulating gas passage 6 and the hydrogen pressure storage tank regulating gas passage 7 under the action of the pressure difference generated by the first oxygen chamber 13 and the second oxygen chamber 10 .

[0058] The first hydrogen chamber 5, the hydrogen-liquid separator pressure gas channel 4, the second hydrogen chamber 8, the second oxygen chamber 10, the first oxygen chamber 13, the hydrogen-liquid separator regulating gas channel 6, the hydrogen pressure storage tank regulating gas channel 7, the oxygen-liquid separator regulating gas channel 9, the oxygen pressure storage tank regulating gas channel 11, and the oxygen-liquid separator pressure gas channel 12 are separated by the valve core 3 to avoid hydrogen and oxygen from mixing with each other.

[0059] When the overall size of the pressure balancing valve does not change, to increase the speed of the pressure balancing valve regulating pressure, it is necessary to increase the size of the first hydrogen chamber 5 and the first oxygen chamber 13, the valve core 3 becomes compact, and the size of the flow channel cavity through which the hydrogen and oxygen gases flow becomes smaller; to reduce the speed of the pressure balancing valve regulating pressure, it is necessary to reduce the size of the first hydrogen chamber 5 and the first oxygen chamber 13, the valve core 3 becomes bloated, and the size of the flow channel cavity through which the hydrogen and oxygen gases flow becomes larger.

[0060] The presence of the hydrogen side spring 1 and the oxygen side spring 15 prevents the valve core 3 from moving randomly under a small pressure difference. Adjusting the elastic force and the pulling force of the hydrogen side spring 1 and the oxygen side spring 15 can be used to set the initial value of the force pushing the valve core 3 to move and the speed of the valve core movement, making the pressure balance valve controllable.

[0061] The hydrogen side spring 1 has a hydrogen side stopper 16 on its outer side, and the oxygen side spring 15 has an oxygen side stopper 17 on its outer side. The hydrogen side stopper 16 and the oxygen side stopper 17 play a limiting role to prevent the valve core from excessively moving and damaging the pressure balancing valve.

[0062] The pressure balancing valve has a left end cover 18 and a right end cover 19, and the left end cover 18 and the right end cover 19 respectively serve to fix the hydrogen side spring 1 and the oxygen side spring 15.

[0063] The control method of the pressure balance valve is as follows: when hydrogen flows into the hydrogen gas-liquid separator pressure gas passage 4, pressure is generated in the first hydrogen chamber 5 to push the valve core 3 to move, so that the oxygen liquid separator regulating gas passage 9 and the oxygen pressure storage tank regulating gas passage 11 are connected through the second oxygen chamber 10, and oxygen flows through the second oxygen chamber 10, so that the oxygen pressure storage tank releases oxygen toward the oxygen liquid separator;

[0064] When oxygen flows into the oxygen-liquid separator pressure air channel 12, pressure is generated in the first oxygen chamber 13 to push the valve core 3 to move, so that the hydrogen-liquid separator regulating air channel 6 and the hydrogen pressure storage tank regulating air channel 7 are connected through the second hydrogen chamber 8, and hydrogen flows through the second hydrogen chamber 8, so that the hydrogen pressure storage tank releases hydrogen toward the hydrogen-liquid separator.

[0065] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] like Figure 1As shown, the present invention discloses a pressure balancing valve capable of automatically balancing the internal pressure of a gas-liquid separator, wherein the structure mainly comprises a hydrogen side spring 1, a hydrogen side piston 2, a valve core 3, a hydrogen-liquid separator pressure airway 4, a first hydrogen chamber 5, a hydrogen-liquid separator regulating airway 6, a hydrogen pressure storage tank regulating airway 7, a second hydrogen chamber 8, an oxygen-liquid separator regulating airway 9, a second oxygen chamber 10, an oxygen pressure storage tank regulating airway 11, an oxygen-liquid separator pressure airway 12, a first oxygen chamber 13, an oxygen side piston 14, an oxygen side spring 15, a hydrogen side block 16, an oxygen side block 17, a left end cover 18, and a right end cover 19. Hydrogen flows into the hydrogen-liquid separator pressure airway 4, and pressure is generated in the first hydrogen chamber 5 to push the valve core 3 to move. When it moves to the oxygen-liquid separator regulating airway 9 and the oxygen pressure storage tank regulating airway 11 to open, oxygen flows through the second oxygen chamber 10; oxygen flows into the oxygen-liquid separator pressure airway 12, and pressure is generated in the first oxygen chamber 13 to push the valve core 3 to move. When it moves to the hydrogen-liquid separator regulating airway 6 and the hydrogen pressure storage tank regulating airway 7 to open, hydrogen flows through the second hydrogen chamber; the hydrogen side block 16 and the oxygen side block 17 prevent the valve core from excessive movement and damaging the valve.

[0067] like Figure 2 As shown, when the pressure on the hydrogen side is higher, the valve core moves toward the oxygen side, and the oxygen pressure storage tank is opened to adjust the air passage to replenish air into the oxygen gas-liquid separator.

[0068] like Figure 3 As shown, when the pressure on the oxygen side is higher, the valve core moves toward the hydrogen side, and the hydrogen pressure storage tank is opened to adjust the gas passage to replenish gas into the hydrogen gas-liquid separator.

[0069] like Figure 4 As shown, the pressure balancing valve N7 of this embodiment is connected to the pressure regulating pipeline. The structure of the electrolytic water hydrogen production device including the pressure balancing valve mainly includes: a hydrogen side liquid level gauge N1, a hydrogen gas-liquid separator N2, a hydrogen discharge pipe N3, a hydrogen side alkali liquid circulation pipeline N4, a hydrogen gas-liquid separator air supply pipe N5, a hydrogen gas-liquid separator pressure pipe N6, a pressure balancing valve N7, a hydrogen pressure storage tank N8, a hydrogen pressure storage tank air supply pipe N9, a ball valve N10, an oxygen pressure storage tank air supply pipe N11, an oxygen pressure storage tank N12, an oxygen liquid separator pressure pipe N13, an oxygen liquid separator air supply pipe N14, an oxygen discharge pipe N15, an oxygen liquid separator N16, an oxygen side alkali liquid circulation pipeline N17, an oxygen side liquid level gauge N18 and an oxygen side alkali liquid circulation pipeline N17;

[0070] The pressure imbalance between the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16 causes a pressure difference between the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16. The hydrogen side liquid level gauge N1 and the oxygen side liquid level gauge N18 measure the liquid level height imbalance in the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16. Under the action of the pressure difference, the gas flows into the pressure balance valve N7 through the hydrogen gas-liquid separator pressure pipe N6 and the oxygen liquid separator pressure pipe N13 to push the valve core to move. , open the regulating air passage, and the gas in the hydrogen pressure storage tank N8 and the oxygen pressure storage tank N12 is replenished toward the hydrogen gas-liquid separator N2 and the oxygen liquid separator N16 with high liquid levels through the hydrogen pressure storage tank air supply pipe N9, the oxygen pressure storage tank air supply pipe N11, the hydrogen gas-liquid separator air supply pipe N5, and the oxygen liquid separator air supply pipe N14, so that the liquid flows out of the separator through the hydrogen side alkali liquid circulation pipeline N4 and the oxygen side alkali liquid circulation pipeline N17, thereby lowering the liquid level.

Claims

1. A pressure balancing valve for a water electrolysis hydrogen production device, characterized in that: The pressure balancing valve comprises a hydrogen side pressure balancing valve component, an oxygen side pressure balancing valve component and a valve core (3); The hydrogen side pressure balance valve assembly comprises a hydrogen side spring (1), a hydrogen side piston (2), a hydrogen gas-liquid separator pressure air passage (4), a first hydrogen chamber (5), a hydrogen gas-liquid separator regulating air passage (6), a hydrogen pressure storage tank regulating air passage (7), and a second hydrogen chamber (8); The oxygen side pressure balance valve assembly comprises an oxygen liquid separator regulating airway (9), a second oxygen chamber (10), an oxygen pressure storage tank regulating airway (11), an oxygen liquid separator pressure airway (12), a first oxygen chamber (13), an oxygen side piston (14), and an oxygen side spring (15); The hydrogen gas-liquid separator pressure air passage (4), the hydrogen gas-liquid separator regulating air passage (6), the hydrogen pressure storage tank regulating air passage (7), the oxygen gas-liquid separator regulating air passage (9), the oxygen pressure storage tank regulating air passage (11), and the oxygen gas-liquid separator pressure air passage (12) are all connected to an external pipeline; The first hydrogen chamber (5) is in gas communication with the hydrogen liquid separator pressure gas passage (4), hydrogen enters the first hydrogen chamber (5) through the hydrogen liquid separator pressure gas passage (4), and generates a pressure difference to drive the valve core (3) to move, thereby realizing the opening and closing of the oxygen flow passage formed by the oxygen liquid separator regulating gas passage (9), the second oxygen chamber (10), and the oxygen pressure storage tank regulating gas passage (11), and the size of the oxygen flow passage; The oxygen-liquid separator pressure gas passage (12) is in gas communication with the first oxygen chamber (13), and oxygen enters the first oxygen chamber (13) through the oxygen-liquid separator pressure gas passage (12), and generates a pressure difference to drive the valve core (3) to move, thereby realizing the opening and closing of the hydrogen flow passage formed by the hydrogen-liquid separator regulating gas passage (6), the second hydrogen chamber (8), and the hydrogen pressure storage tank regulating gas passage (7), and the size of the hydrogen flow passage.

2. The pressure balancing valve according to claim 1, characterized in that: When hydrogen flows into the first hydrogen chamber (5) through the hydrogen-liquid separator pressure channel (4), pressure in the direction of the oxygen side is generated; When oxygen flows into the first oxygen chamber (13) through the oxygen-liquid separator pressure airway (12), pressure in the direction of hydrogen is generated.

3. The pressure balancing valve according to claim 1, characterized in that: The valve core (3) controls the opening and closing and size of the oxygen-liquid separator regulating airway (9) and the oxygen pressure storage tank regulating airway (11) under the action of the pressure difference generated by the first hydrogen chamber (5) and the second hydrogen chamber (8); The valve core (3) controls the opening and closing and size of the hydrogen gas-liquid separator regulating gas passage (6) and the hydrogen pressure storage tank regulating gas passage (7) under the action of the pressure difference generated by the first oxygen chamber (13) and the second oxygen chamber (10).

4. The pressure balancing valve according to claim 1, characterized in that: The first hydrogen chamber (5), the hydrogen-liquid separator pressure gas passage (4), the second hydrogen chamber (8), the second oxygen chamber (10), the first oxygen chamber (13), the hydrogen-liquid separator regulating gas passage (6), the hydrogen pressure storage tank regulating gas passage (7), the oxygen-liquid separator regulating gas passage (9), the oxygen pressure storage tank regulating gas passage (11), and the oxygen-liquid separator pressure gas passage (12) are separated by the valve core (3) to prevent hydrogen and oxygen from flowing into each other.

5. The pressure balancing valve according to claim 1, characterized in that: In order to increase the speed of the pressure balancing valve in regulating the pressure without changing the overall size of the pressure balancing valve, the size of the first hydrogen chamber (5) and the first oxygen chamber (13) needs to be increased, the valve core (3) becomes compact, and the size of the flow channel cavity through which the hydrogen and oxygen gases flow becomes smaller; In order to reduce the speed at which the pressure balancing valve regulates the pressure, it is necessary to reduce the size of the first hydrogen chamber (5) and the first oxygen chamber (13), so that the valve core (3) becomes bulky and the size of the flow channel through which the hydrogen and oxygen gases flow becomes larger.

6. The pressure balancing valve according to claim 1, characterized in that: The presence of the hydrogen side spring (1) and the oxygen side spring (15) prevents the valve core (3) from moving randomly under a small pressure difference. Adjusting the elastic force and the pulling force of the hydrogen side spring (1) and the oxygen side spring (15) can be used to set the initial value of the force pushing the valve core (3) to move and the speed of the valve core movement, so that the pressure balance valve can be controlled.

7. The pressure balancing valve according to claim 1, characterized in that: The hydrogen side spring (1) has a hydrogen side stopper (16) on its outer side, and the oxygen side spring (15) has an oxygen side stopper (17) on its outer side. The hydrogen side stopper (16) and the oxygen side stopper (17) play a role of limiting, thereby preventing the valve core from excessively moving and damaging the pressure balancing valve.

8. The pressure balancing valve according to claim 1, characterized in that: The left end cover (18) and the right end cover (19) of the pressure balancing valve respectively serve to fix the hydrogen side spring (1) and the oxygen side spring (15).

9. A method for controlling a pressure balancing valve according to any one of claims 1 to 8, characterized in that: When hydrogen flows into the hydrogen gas-liquid separator pressure gas passage (4), pressure is generated in the first hydrogen chamber (5) to push the valve core (3) to move, so that the oxygen liquid separator regulating gas passage (9) and the oxygen pressure storage tank regulating gas passage (11) are connected to each other through the second oxygen chamber (10), and oxygen flows through the second oxygen chamber (10), so that the oxygen pressure storage tank releases oxygen toward the oxygen liquid separator; When oxygen flows into the oxygen-liquid separator pressure air passage (12), pressure is generated in the first oxygen chamber (13) to push the valve core (3) to move, so that the hydrogen-liquid separator regulating air passage (6) and the hydrogen pressure storage tank regulating air passage (7) are connected to each other through the second hydrogen chamber (8), and hydrogen flows through the second hydrogen chamber (8), thereby causing the hydrogen pressure storage tank to release hydrogen toward the hydrogen-liquid separator.

10. A water electrolysis hydrogen production device comprising the pressure balancing valve according to any one of claims 1 to 8, characterized in that: It includes a hydrogen side liquid level gauge (N1), a hydrogen gas-liquid separator (N2), a hydrogen gas discharge pipe (N3), a hydrogen side alkali liquid circulation pipeline (N4), a hydrogen gas-liquid separator air supply pipe (N5), a hydrogen gas-liquid separator pressure pipe (N6), a pressure balance valve (N7), a hydrogen pressure storage tank (N8), a hydrogen pressure storage tank air supply pipe (N9), a ball valve (N10), an oxygen pressure storage tank air supply pipe (N11), an oxygen pressure storage tank (N12), an oxygen liquid separator pressure pipe (N13), an oxygen liquid separator air supply pipe (N14), an oxygen discharge pipe (N15), an oxygen liquid separator (N16), an oxygen side alkali liquid circulation pipeline (N17), and an oxygen side liquid level gauge (N18); The pressure imbalance between the hydrogen gas-liquid separator (N2) and the oxygen gas-liquid separator (N16) causes a pressure difference between the hydrogen gas-liquid separator (N2) and the oxygen gas-liquid separator (N16). The hydrogen side liquid level gauge (N1) and the oxygen side liquid level gauge (N18) measure that the liquid level heights in the hydrogen gas-liquid separator (N2) and the oxygen gas-liquid separator (N16) are unbalanced. Under the action of the pressure difference, the gas flows into the pressure balance valve (N7) through the hydrogen gas-liquid separator pressure pipe (N6) and the oxygen gas-liquid separator pressure pipe (N13), pushing the valve core to move. The regulating air passage is opened, and the gas in the hydrogen pressure storage tank (N8) and the oxygen pressure storage tank (N12) is supplied to the hydrogen gas-liquid separator (N2) and the oxygen gas-liquid separator (N16) with high liquid levels through the hydrogen pressure storage tank air supply pipe (N9), the oxygen pressure storage tank air supply pipe (N11), the hydrogen gas-liquid separator air supply pipe (N5), and the oxygen gas-liquid separator air supply pipe (N14), so that the liquid flows out of the separator through the hydrogen side alkali liquid circulation pipeline (N4) and the oxygen side alkali liquid circulation pipeline (N17), thereby lowering the liquid level.

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