Hydrogen generator hydrogen differential pressure regulating valve

Abstract

The present invention discloses a hydrogen differential pressure regulating valve for a hydrogen generator, comprising a valve body and a valve cover, wherein the valve body is provided with a hydrogen inlet and a hydrogen outlet, and an elastic partition is fixed in the valve body to divide it into an oxygen chamber and a hydrogen chamber respectively, a valve seat is fixed in the valve body, and a valve core is fixed on the partition, and the elastic change of the partition enables the valve core to selectively seal the valve seat, and a compression spring is provided on the surface of the partition located on one side of the oxygen chamber, and the hydrogen pressure of the hydrogen chamber is equal to the sum of the oxygen pressure of the oxygen chamber and the pressure of the compression spring on the partition. The beneficial effects of the present invention are mainly reflected in that due to the presence of the compression spring, it is ensured that there is a pressure difference between the hydrogen chamber and the oxygen chamber to control the pressure in the hydrogen chamber to always be greater than the pressure in the oxygen chamber, which plays a basic regulating role for the hydrogen generator to obtain high-purity hydrogen.

Description

Technical Field

[0001] The invention relates to the technical field of water electrolysis hydrogen production equipment, and in particular to a hydrogen differential pressure regulating valve for a hydrogen generator. Background Art

[0002] With global warming, environmental degradation, and reduced oil resources, all countries are actively developing new energy sources. Hydrogen energy is widely recognized as a clean energy source for use in fuel cell systems. At this stage, it has been applied in large quantities in the market, such as fuel cell vehicles and hydrogen refueling stations. Currently, hydrogen is mainly produced by hydrolysis hydrogen production devices. The gases produced by hydrolysis hydrogen production devices include hydrogen and oxygen. During the hydrolysis process, in order to ensure the safe operation of the hydrogen generator, a control valve needs to be set to adjust the pressure inside the hydrogen generator.

[0003] The existing hydrogen generator hydrogen pressure regulation generally uses electronic valves for regulation, which has the following disadvantages: electronic instruments are required; UPS is required to prevent sudden power outages from causing the valve regulation function to fail; the valve core is connected to the pneumatic unit, and the valve core is sealed with a stuffing box. Due to the frequent movement of the valve core, the stuffing box will wear out and fail, resulting in gas leakage. Therefore, how to safely and effectively regulate the pressure inside the hydrogen generator is an urgent problem to be solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a hydrogen differential pressure regulating valve for a hydrogen generator.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A hydrogen differential pressure regulating valve for a hydrogen generator comprises a valve body, wherein the valve body is provided with a hydrogen inlet and a hydrogen outlet, a valve cover is fixedly provided above the valve body, the two are hollow to form an internal space, an elastic partition is fixed in the internal space and divides the internal space into two parts, namely an oxygen chamber and a hydrogen chamber, the hydrogen chamber is connected with the hydrogen inlet and the hydrogen outlet, a valve seat is fixed in the valve body, a valve core is fixed on the partition, the elastic change of the partition enables the valve core to selectively seal the valve seat, the valve seat is provided in the hydrogen chamber, when the valve core seals the valve seat, the hydrogen passage between the hydrogen inlet and the hydrogen outlet is cut off, a compression spring is provided on the surface of the partition located on one side of the oxygen chamber, the hydrogen pressure of the hydrogen chamber is equal to the sum of the oxygen pressure of the oxygen chamber and the pressure of the compression spring on the partition.

[0007] Preferably, an oxygen inlet is provided through the valve cover, and the oxygen inlet is communicated with the oxygen chamber.

[0008] Preferably, a return spring is sleeved on the outer periphery of the valve core, one end of the return spring abuts against the valve seat, and the other end of the return spring abuts against the partition member.

[0009] Preferably, the valve seat has a central hole, the central hole is connected to the hydrogen inlet and the hydrogen cavity, and the valve core is a conical free end that can selectively extend into the central hole.

[0010] Preferably, a first sealing ring is provided between the valve seat and the valve body.

[0011] Preferably, the valve seat and the valve body are tightly fitted.

[0012] Preferably, the hydrogen inlet and the hydrogen outlet are coaxial.

[0013] Preferably, the valve body and the valve cover are fastened by bolts, and the partition member is fastened between the valve body and the valve cover by the bolts.

[0014] Preferably, the partition member is a fluoroplastic diaphragm, and the valve core is a stainless steel member.

[0015] The beneficial effects of the present invention are mainly reflected in:

[0016] 1. Due to the existence of the compression spring, a pressure difference is ensured between the hydrogen chamber and the oxygen chamber to control the pressure in the hydrogen chamber to always be greater than the pressure in the oxygen chamber, which plays a basic regulating role for the hydrogen generator to produce high-purity hydrogen;

[0017] 2. The entire valve body is a purely mechanical structure. During the process of adjusting the air pressure difference, there is no need to worry about the problem of power failure causing the valve body to fail to adjust;

[0018] 3. Simple and exquisite structure, multi-stage sealing ring setting, good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0020] Figure 1 : A schematic diagram of an embodiment of the present invention;

[0021] Figure 2 : Figure 1 Enlarged view of part A. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all included in the protection scope of the present invention.

[0023] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0024] like Figure 1 As shown, the present invention discloses a hydrogen differential pressure regulating valve for a hydrogen generator, comprising a valve body 1, a valve cover 3 is fixedly arranged above the valve body 1, in this preferred embodiment, the valve body 1 and the valve cover 3 are fastened by bolts, and the two are hollow to form an internal space 100, and an elastic partition 4 is fixed in the internal space 100 and divides the internal space 100 into two parts, namely an oxygen chamber 41 and a hydrogen chamber 42. The partition 4 is fastened between the valve body 1 and the valve cover 3 by the bolts. Of course, in other embodiments, the valve body 1, the valve cover 3 and the partition 4 can also be fixedly connected by other means, such as other mechanical mechanisms with fixing functions or strong adhesives. The partition 4 in the present invention is a fluoroplastic diaphragm, which has good high temperature resistance and corrosion resistance, and is water-permeable but air-tight, so that the hydrogen generated in the hydrogen preparation cannot pass through the partition 4.

[0025] The valve body 1 is provided with a hydrogen inlet 11 and a hydrogen outlet 12, and the hydrogen cavity 42 is in communication with the hydrogen inlet 11 and the hydrogen outlet 12; the valve cover 3 is provided with an oxygen inlet 31, and the oxygen inlet 31 is in communication with the oxygen cavity 41. In order to optimize the device structure and reduce the size of the device, the hydrogen inlet 11 and the hydrogen outlet 12 are coaxial, and this arrangement also makes the device more beautiful.

[0026] A valve seat 2 is fixed in the valve body 1, and the valve seat 2 is arranged in the hydrogen chamber 42. In order to increase the sealing performance of the valve seat 2, a first sealing ring 8 is provided between the valve seat 2 and the valve body 1, and the valve seat 2 and the valve body 1 are tightly fitted. The first sealing ring 8 has elastic properties and can ensure that the valve seat 2 and the valve body 1 maintain close contact.

[0027] A valve core 5 is fixed on the partition member 4, and the elastic change of the partition member 4 enables the valve core 5 to selectively seal the valve seat 2. In this preferred embodiment, the valve core 5 is a stainless steel part, and the valve core 5 and the partition member 4 are formed in one piece; in other embodiments, the valve core 5 can be fixedly connected to the partition member 4 by other suitable means such as adhesives. Figure 2 As shown, the valve seat 2 has a center hole 21, which is connected to the hydrogen inlet 11 and the hydrogen cavity 42. The valve core 5 is a conical free end that can selectively extend into the center hole 21. When the valve core 5 seals the valve seat 2, the hydrogen channel between the hydrogen inlet 11 and the hydrogen outlet 12 is cut off.

[0028] The conical free end of the valve core 5 improves the accuracy of the valve core 5 extending into the center hole 21, and a second sealing ring 9 can be optionally provided on the inner wall of the center hole 21. After the valve core 5 is extended into the center hole 21, its outer wall is in close contact with the second sealing ring 9 to block the center hole 21. At the same time, the setting of the second sealing ring 9 protects the valve core 5 from excessive wear during use.

[0029] In order to maintain the pressure balance on both sides of the partition 4, a compression spring 6 is arranged on the surface of the partition 4 on one side of the oxygen chamber 41, and the hydrogen pressure of the hydrogen chamber 42 is equal to the sum of the oxygen pressure of the oxygen chamber 41 and the pressure of the compression spring 6 on the partition 4. The arrangement of the compression spring 6 makes the hydrogen pressure in the hydrogen chamber 42 always greater than the oxygen pressure in the oxygen chamber 41. If the hydrogen pressure in the hydrogen chamber 42 is to be adjusted, the pressure of the compression spring 6 can be increased or reduced. In this way, since the hydrogen pressure in the hydrogen chamber 42 is consistent with the hydrogen pressure obtained by the hydrogen generator, the pressure on the hydrogen side of the hydrogen generator can be large, and then the hydrogen and oxygen pressures on both sides of the diaphragm of the water electrolyzer of the hydrogen generator can be different (the pressure on the oxygen side is equal to the pressure of the oxygen chamber in the present invention), that is, the oxygen pressure is less than the hydrogen pressure, so that oxygen will not pass through the diaphragm into the hydrogen side, so that the hydrogen generator can more easily obtain high-purity hydrogen.

[0030] The outer periphery of the valve core 5 is sleeved with a return spring 7, one end of which abuts against the valve seat 2, and the other end abuts against the partition member 4. The return spring 7 can solve the problem that the valve core 5 is difficult to return to its original position after extending into the central hole 21.

[0031] The working principle of the present invention is briefly described below:

[0032] The hydrogen generated by the hydrogen generator enters the hydrogen chamber 42 from the hydrogen inlet 11, and the generated oxygen enters the oxygen chamber 41 from the oxygen inlet 31. Due to the presence of the compression spring 6, the hydrogen pressure in the hydrogen chamber 42 is set higher than the oxygen pressure in the oxygen chamber 41, the valve core 5 is separated from the valve seat 2, and the hydrogen is output from the hydrogen outlet 12 through the central hole 21.

[0033] When the hydrogen pressure generated by the hydrogen generator needs to be changed, it is sufficient to replace the compression spring 6 with a different pressure. In actual production, it is sufficient to replace a regulating valve of the present invention with a different compression spring 6. The entire valve body of the present invention is a purely mechanical structure. In the process of adjusting the pressure difference, there is no need to worry about the problem of valve body adjustment failure caused by power failure.

[0034] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0035] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. Hydrogen differential pressure regulating valve for hydrogen generator, characterized by: The invention comprises a valve body (1), wherein the valve body (1) is provided with a hydrogen inlet (11) and a hydrogen outlet (12), a valve cover (3) is fixedly provided above the valve body (1), and the two are hollow to form an internal space (100), an elastic partition (4) is fixed in the internal space (100) and divides the internal space (100) into two parts, namely an oxygen chamber (41) and a hydrogen chamber (42), wherein the hydrogen chamber (42) is communicated with the hydrogen inlet (11) and the hydrogen outlet (12), a valve seat (2) is fixed in the valve body (1), a valve core (5) is fixed on the partition (4), and the elastic change of the partition (4) causes the valve to The core (5) can selectively seal the valve seat (2), and the valve seat (2) is arranged in the hydrogen chamber (42). When the valve core (5) seals the valve seat (2), the hydrogen passage between the hydrogen inlet (11) and the hydrogen outlet (12) is cut off. A compression spring (6) is arranged on the surface of the partition member (4) located on one side of the oxygen chamber (41), and the hydrogen pressure of the hydrogen chamber (42) is equal to the sum of the oxygen pressure of the oxygen chamber (41) and the pressure of the compression spring (6) on the partition member (4). A return spring (7) is sleeved on the outer periphery of the valve core (5), one end of which is in contact with the valve seat (2) and the other end of which is in contact with the partition member (4). The valve cover (3) is provided with an oxygen inlet (31) extending therethrough, the oxygen inlet (31) being in communication with the oxygen chamber (41); the valve seat (2) has a central hole (21), the central hole (21) being in communication with the hydrogen inlet (11) and the hydrogen chamber (42); the valve core (5) is a conical free end that can selectively extend into the central hole (21).

2. The hydrogen differential pressure regulating valve for a hydrogen generator according to claim 1, characterized in that: A first sealing ring (8) is provided between the valve seat (2) and the valve body (1).

3. The hydrogen differential pressure regulating valve for a hydrogen generator according to claim 2, characterized in that: The valve seat (2) and the valve body (1) are tightly fitted.

4. The hydrogen differential pressure regulating valve for a hydrogen generator according to claim 1, characterized in that: The hydrogen inlet (11) and the hydrogen outlet (12) are coaxial.

5. The hydrogen differential pressure regulating valve for a hydrogen generator according to claim 1, characterized in that: The valve body (1) and the valve cover (3) are fastened by bolts, and the partition member (4) is fastened between the valve body (1) and the valve cover (3) by the bolts.

6. The hydrogen differential pressure regulating valve for a hydrogen generator according to claim 1, characterized in that: The partition member (4) is a fluoroplastic diaphragm, and the valve core (5) is a stainless steel member.

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