Hydrogen and oxygen following back pressure valve

Abstract

The utility model relates to an oxyhydrogen following back pressure valve which comprises a pressure release valve, an upper cover communicated with the pressure release valve and a valve body connected with the upper cover. An oxygen inlet is formed in the upper cover, a piston is arranged in the upper cover, the piston is connected with the valve element, the valve element is sleeved with a first spring, and the first spring is limited by a check ring connected with the valve element; a hydrogen inlet and a hydrogen outlet are formed in the valve body, a valve port pad is arranged in the valve body, and the valve port pad is connected with the valve seat; according to the structure, the oxygen inlet of the back pressure valve is communicated with the oxygen port for electrolytic hydrogen production, the hydrogen inlet of the back pressure valve is communicated with the hydrogen port for electrolytic hydrogen production, when the oxygen pressure of the oxygen inlet is increased, the hydrogen pressure of the hydrogen inlet is also increased, and it is guaranteed that the pressures on the two sides of the diaphragm are the same.

Description

Technical Field

[0001] The utility model relates to the technical field of back pressure valves, in particular to a hydrogen and oxygen following back pressure valve. Background Art

[0002] The principle of hydrogen production by water electrolysis is that a water electrolysis cell is composed of a pair of electrodes immersed in an electrolyte separated by a diaphragm to prevent gas penetration. When a certain direct current is passed, water decomposes, hydrogen is precipitated at the cathode, and oxygen is precipitated at the anode. During the reaction process, if the pressure of hydrogen and oxygen is not consistent, it is easy to damage the diaphragm, causing damage to the water electrolysis hydrogen production equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a hydrogen-oxygen following back pressure valve to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydrogen-oxygen following back pressure valve, comprising a pressure relief valve, an upper cover connected to the pressure relief valve and a valve body connected to the upper cover; an oxygen inlet is provided on the upper cover, a piston is provided in the upper cover, the piston is connected to the valve core, a first spring is sleeved on the valve core, and the first spring is limited by a retaining ring connected to the valve core; a hydrogen inlet and a hydrogen outlet are provided on the valve body, a valve port pad is provided in the valve body, and the valve port pad is connected to the valve seat; the valve core and the valve port formed by the valve port pad cooperate with each other.

[0005] Optionally, a first O-ring is provided between the piston and the upper cover.

[0006] Optionally, a second O-ring is provided between the upper cover and the valve body.

[0007] Optionally, a first sealed cavity is formed between the piston and the upper cover.

[0008] Optionally, a second sealed chamber is formed between the piston and the valve seat.

[0009] Optionally, the pressure relief valve is communicated with the first sealed chamber.

[0010] Optionally, the hydrogen gas inlet is connected to a first gas channel, and the first gas channel is communicated with the second sealed cavity.

[0011] Optionally, the oxygen inlet is connected to an oxygen inlet for producing hydrogen by electrolysis, and the hydrogen inlet is connected to a hydrogen inlet for producing hydrogen by electrolysis.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model connects the oxygen inlet of the back pressure valve with the oxygen inlet of hydrogen electrolysis, and connects the hydrogen inlet with the hydrogen inlet of hydrogen electrolysis. When the oxygen pressure at the oxygen inlet increases, the hydrogen pressure at the hydrogen inlet also increases, ensuring that the pressures on both sides of the diaphragm are the same.

[0014] 2. On the basis of the back pressure valve, the utility model adds a pressure relief valve connected to the first sealed chamber. When the oxygen pressure is higher than the bearing limit of the diaphragm, the pressure relief valve opens to release the pressure in the first sealed chamber to ensure the stability of the water electrolysis hydrogen production equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0017] like Figure 1 As shown, a hydrogen-oxygen following back pressure valve comprises a pressure relief valve 1, an upper cover 2 connected to the pressure relief valve 1 and a valve body 3 connected to the upper cover 2; an oxygen inlet 4 is provided on the upper cover 2, a piston 5 is provided in the upper cover 2, the piston 5 is connected to a valve core 6, a first spring 7 is sleeved on the valve core 6, and the first spring 7 is limited by a retaining ring 8 connected to the valve core 6; a hydrogen inlet 9 and a hydrogen outlet 10 are provided on the valve body 3, a valve port pad 11 is provided in the valve body 3, and the valve port pad 11 is connected to a valve seat 12; a valve port 13 formed by the valve core 6 and the valve port pad 11 cooperates.

[0018] It should be noted that, in order to ensure a good sealing performance, a first O-ring 14 is provided between the piston 5 and the upper cover 2 . A second O-ring 15 is provided between the upper cover 2 and the valve body 3 .

[0019] A first sealed cavity 16 is formed between the piston 5 and the upper cover 2. A second sealed cavity 17 is formed between the piston 5 and the valve seat 12. The pressure relief valve 1 is connected to the first sealed cavity 16. The hydrogen inlet 9 is connected to the first gas channel 18, and the first gas channel 18 is connected to the second sealed cavity 17. The oxygen inlet 4 is connected to the oxygen inlet of hydrogen electrolysis, and the hydrogen inlet 9 is connected to the hydrogen inlet of hydrogen electrolysis.

[0020] When the utility model is working, F=P1*S1=P2*S2, P1 is the pressure at the oxygen inlet 4, P2 is the pressure at the hydrogen inlet 9, S1 is the area of ​​one side of the piston 5, and S2 is the area of ​​the other side of the piston 5. Since the areas of S1 and S2 are equal, when water is electrolyzed to produce hydrogen, 2H2O=2H2+O2, and the volume of generated hydrogen is twice the volume of oxygen, so the speed at which the hydrogen pressure P2 increases is fast, and the speed at which the oxygen pressure P1 increases is slow. When P2>P1, since the piston area S2=S1, the piston 5 moves upward, the valve core 6 is separated from the valve port 13, and the hydrogen is discharged through the valve port 13 through the hydrogen outlet 10, thereby ensuring P1*S1=P2*S2, that is, P1=P2, and it can be ensured that the hydrogen pressure increases synchronously with the oxygen pressure.

[0021] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hydrogen and oxygen follow-up back pressure valve, characterized in that: It comprises a pressure relief valve (1), an upper cover (2) connected to the pressure relief valve (1), and a valve body (3) connected to the upper cover (2); The upper cover (2) is provided with an oxygen inlet (4), the upper cover (2) is provided with a piston (5), the piston (5) is connected to a valve core (6), a first spring (7) is sleeved on the valve core (6), and the first spring (7) is limited by a retaining ring (8) connected to the valve core (6); The valve body (3) is provided with a hydrogen inlet (9) and a hydrogen outlet (10), and a valve port pad (11) is provided inside the valve body (3), and the valve port pad (11) is connected to the valve seat (12); The valve core (6) cooperates with a valve port (13) formed by a valve port pad (11).

2. A hydrogen-oxygen following back pressure valve according to claim 1, characterized in that: A first O-ring (14) is provided between the piston (5) and the upper cover (2).

3. A hydrogen-oxygen follow-up back pressure valve according to claim 2, characterized in that: A second O-ring (15) is provided between the upper cover (2) and the valve body (3).

4. A hydrogen-oxygen follow-up back pressure valve according to claim 3, characterized in that: A first sealed cavity (16) is formed between the piston (5) and the upper cover (2).

5. A hydrogen-oxygen follow-up back pressure valve according to claim 4, characterized in that: A second sealing chamber (17) is formed between the piston (5) and the valve seat (12).

6. A hydrogen-oxygen follow-up back pressure valve according to claim 5, characterized in that: The pressure relief valve (1) is in communication with the first sealed chamber (16).

7. A hydrogen-oxygen follow-up back pressure valve according to claim 6, characterized in that: The hydrogen inlet (9) is connected to a first gas channel (18), and the first gas channel (18) is in communication with a second sealed cavity (17).

8. A hydrogen-oxygen follow-up back pressure valve according to claim 7, characterized in that: The oxygen inlet (4) is connected to the oxygen inlet for producing hydrogen by electrolysis, and the hydrogen inlet (9) is connected to the hydrogen inlet for producing hydrogen by electrolysis.

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