A safety control valve and system for electrolytic cell maintenance

Abstract

The present invention discloses an electrolytic cell maintenance safety control valve and system, belonging to the technical field of electrolytic cells, which includes a plurality of partitions fixed at intervals inside the valve body, and the interior of the valve body is divided into a plurality of relatively independent chambers, and through holes are opened on the partitions; a plurality of valve cores are arranged on the valve stem, and the plurality of valve cores are arranged one by one with the plurality of through holes, and the closing and opening of the valve are controlled by the approach and distance between the valve core and the through holes; a driving mechanism is arranged on the upper part of the valve body, and is used to drive the rise and fall of the valve stem. When one of the plurality of electrolytic cells of the electrolytic cell maintenance safety control valve of the present invention needs to be repaired, an external air source stably supplies air to its corresponding air inlet pipe, so that the diaphragm generates thrust, the transmission plate moves downward, and the valve stem moves downward, so that the return spring is compressed, the first valve core and the first through hole are closed, the second valve core and the second through hole are closed, the fluid is cut off, and rapid closure is achieved, and the sealing of the valve is improved through two layers of sealing.

Description

Technical Field

[0001] The invention belongs to the technical field of electrolytic cells, and in particular relates to an electrolytic cell maintenance safety control valve and system. Background Art

[0002] As the demand for energy grows, non-renewable energy such as fossil fuels is increasingly consumed, and the development and utilization of new energy sources has become an increasingly urgent requirement. Hydrogen is non-toxic, and the product after combustion is water, which does not pollute the air. It is considered to be an ideal clean new energy source and is attracting more and more attention. The electrolyzer hydrogen production technology is also developing continuously. The hydrogen produced by the electrolyzer is collected after passing through the gas-water separator and purification mechanism. Due to the low efficiency of electrolytic hydrogen production, the electrolyzer is composed of multiple electrolytic chambers stacked vertically. Laterally, multiple electrolyzers are used to correspond to the same gas-water separator at the same time to improve the hydrogen production efficiency. However, when a single electrolyzer is overhauled, the entire hydrogen and oxygen production system needs to be cut off, and the flow of hydrogen and oxygen cannot be quickly cut off during the electrolyzer overhaul, which may cause gas or alkali leakage during the electrolyzer overhaul. Summary of the invention

[0003] In order to solve the above problems, the present invention adopts the following technical solutions:

[0004] An electrolytic cell maintenance safety control valve, comprising:

[0005] A valve body, wherein flanges are provided at both ends of the valve body;

[0006] A plurality of partitions are fixed at intervals inside the valve body and divide the inside of the valve body into a plurality of relatively independent chambers, and through holes are provided on the partitions;

[0007] A valve stem, wherein a plurality of valve cores are arranged on the valve stem, and the plurality of valve cores are arranged in one-to-one correspondence with the plurality of through holes, and the closing and opening of the valve can be controlled by moving the valve cores and the through holes closer to and farther from each other;

[0008] A driving mechanism is arranged on the upper part of the valve body and is used to drive the valve stem to rise and fall.

[0009] Further, there are two partitions, namely a first partition and a second partition, the first partition divides the interior of the valve body into an upper inner cavity and a lower inner cavity, the through hole on the first partition is a first through hole, the second partition is fixed in the upper inner cavity and divides the upper inner cavity into a first upper inner cavity and a second upper inner cavity, the through hole on the second partition is a second through hole, the second through hole is located directly above the first through hole, and the size of the second through hole is larger than the size of the first through hole;

[0010] There are two valve cores, namely a first valve core and a second valve core. The first valve core is located in the first upper inner cavity, and the second valve core is located in the second upper inner cavity. The first valve core is arranged in cooperation with the first through hole, and the second valve core is arranged in cooperation with the second through hole.

[0011] Furthermore, the first through hole and the second through hole are both inverted tapered through holes.

[0012] Furthermore, sealing rings are provided at both the first through hole and the second through hole.

[0013] Furthermore, the driving mechanism comprises:

[0014] A compartment, the compartment being arranged at an upper end of the valve body;

[0015] A diaphragm, which is disposed inside the compartment and separates the compartment into an upper diaphragm cavity and a lower diaphragm cavity;

[0016] An air inlet pipe, wherein a first end of the air inlet pipe is connected to an external air supply device, and a second end of the air inlet pipe is communicated with the compartment;

[0017] A transmission sheet, the transmission sheet is fixedly connected to the surface of the diaphragm;

[0018] A return spring is sleeved on the valve stem, and a first end of the return spring abuts against the transmission sheet, and a second end abuts against the lower end surface of the lower membrane cavity.

[0019] Furthermore, the air inlet pipe is arranged to gradually contract from the first end to the second end.

[0020] An electrolytic cell maintenance safety system adopts the electrolytic cell maintenance safety control valve described in any one of the above items, and safety control valves are arranged between the hydrogen outlet of the electrolytic cell and the hydrogen gas-water separation device, and between the oxygen outlet of the electrolytic cell and the oxygen gas-water separation device.

[0021] Beneficial effects:

[0022] When one of the multiple electrolytic cells of the electrolytic cell maintenance safety control valve of the present invention needs to be repaired, an external air source supplies air to its corresponding air inlet pipe stably, so that the diaphragm generates thrust, the transmission plate moves downward, and the valve stem moves downward, so that the return spring is compressed, the first valve core and the first through hole are closed, and the second valve core and the second through hole are closed, so that the fluid is cut off and rapid closing is achieved. The sealing performance of the valve is improved through the two-layer sealing.

[0023] A safety control valve is added between the hydrogen and oxygen side outlet of the electrolytic cell and its corresponding gas-liquid separator. When a single electrolytic cell needs to be repaired, the flow of hydrogen and oxygen is quickly cut off through its corresponding safety control valve, thereby preventing gas or alkali liquid leakage during the electrolytic cell repair process, avoiding safety accidents such as fire and explosion caused by leakage, and improving the safety of the electrolytic cell during repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the electrolytic cell maintenance safety control valve of the present invention;

[0025] Figure 2 It is a schematic diagram of the electrolytic cell maintenance safety system of the present invention.

[0026] Among them, 100, safety control valve; 101, valve body; 102, flange; 103, valve stem; 104, first partition; 105, first valve core; 106, second partition; 107, second valve core; 108, compartment; 109, diaphragm; 110, transmission plate; 111, return spring; 112, air inlet pipe; 200, hydrogen gas-water separator; 300, oxygen gas-water separator; 400, electrolyzer. DETAILED DESCRIPTION

[0027] Example 1

[0028] refer to Figure 1-Figure 2 , an electrolytic cell maintenance safety control valve, comprising:

[0029] A valve body 101, with flanges 102 disposed at both ends of the valve body 101;

[0030] A plurality of partitions are fixed at intervals inside the valve body 101, and the interior of the valve body 101 is divided into a plurality of relatively independent chambers, and through holes are provided on the partitions;

[0031] The valve stem 103 is provided with a plurality of valve cores, and the plurality of valve cores are provided in a one-to-one correspondence with the plurality of through holes, and the closing and opening of the valve can be controlled by moving the valve cores and the through holes closer or farther away from each other;

[0032] The driving mechanism is disposed on the upper portion of the valve body 101 and is used to drive the valve stem 103 to rise and fall.

[0033] In this embodiment, there are two partitions, namely, a first partition 104 and a second partition 106. The first partition 104 divides the interior of the valve body 101 into an upper inner cavity and a lower inner cavity. The through hole on the first partition 104 is a first through hole. The second partition 106 is fixed in the upper inner cavity and divides the upper inner cavity into a first upper inner cavity and a second upper inner cavity. The through hole on the second partition 106 is a second through hole. The second through hole is located directly above the first through hole, and the size of the second through hole is larger than the size of the first through hole.

[0034] There are two valve cores, namely the first valve core 105 and the second valve core 107. The first valve core 105 is located in the first upper inner cavity, and the second valve core 107 is located in the second upper inner cavity. The first valve core 105 is arranged in cooperation with the first through hole, and the second valve core 107 is arranged in cooperation with the second through hole.

[0035] In this embodiment, both the first through hole and the second through hole are inverted tapered through holes.

[0036] In this embodiment, sealing rings are disposed at both the first through hole and the second through hole.

[0037] In a specific implementation, O-rings are arranged at the first through hole and the second through hole to further enhance the overall sealing performance.

[0038] In this embodiment, the driving mechanism includes:

[0039] The compartment 108 is disposed at the upper end of the valve body 101;

[0040] The diaphragm 109 is disposed inside the compartment 108 and divides the compartment 108 into an upper membrane cavity and a lower membrane cavity;

[0041] An air inlet pipe 112, wherein a first end of the air inlet pipe 112 is connected to an external air supply device, and a second end of the air inlet pipe 112 is communicated with the compartment 108;

[0042] A transmission sheet 110, the transmission sheet 110 is fixedly connected to the surface of the diaphragm 109;

[0043] The return spring 111 is sleeved on the valve stem 103, and the first end of the return spring 111 abuts against the transmission plate 110, and the second end abuts against the lower end surface of the lower membrane cavity.

[0044] In this embodiment, the air inlet pipe 112 is configured to be gradually tapered from the first end to the second end.

[0045] The present invention sets the air inlet pipe 112 to be gradually reduced, so that the gas entering the compartment 108 can be accelerated, and the valve can be closed more quickly.

[0046] In a specific implementation, when one of the multiple electrolytic cells needs to be repaired, the external air source stably supplies air to the corresponding air inlet pipe, the diaphragm generates thrust, the transmission plate moves downward, drives the valve stem to move downward, compresses the return spring, and the first valve core and the first through hole, the second valve core and the second through hole are closed at the same time, the fluid is cut off, and rapid closing is achieved. The double-layer sealing of the first partition plate and the second partition plate improves the sealing performance of the valve;

[0047] When the inspection is completed, the external air source stops supplying air, and the return spring drives the valve stem to move up quickly to achieve rapid closure, so that the first valve core is separated from the first through hole, and the second valve core is separated from the second through hole, so that the fluid in the valve body can flow normally. When the return spring returns to its original state, the second valve core fits against the inner wall of the valve body, and the side of the second valve core forms an inclined surface, which guides the fluid.

[0048] The safety control valve of the invention can be closed quickly and has good sealing performance, and can prevent gas or alkali solution leakage during the maintenance of the electrolytic cell.

[0049] Example 2

[0050] This embodiment is a maintenance safety system, which adopts the maintenance safety control valve in Example 1. Safety control valves 100 are provided between the hydrogen outlet of the electrolyzer 400 and the hydrogen gas-water separator 200, and between the oxygen outlet of the electrolyzer 400 and the oxygen gas-water separator 300.

[0051] In specific implementation, safety control valves are added between the hydrogen and oxygen side outlets of multiple electrolytic cells and the gas-liquid separator. When a certain electrolytic cell needs to be repaired, the flow of its hydrogen and oxygen is cut off to ensure the safety of the repair process and avoid safety accidents such as fire and explosion caused by gas leakage during the repair process. Moreover, since a safety control valve 100 is provided between each electrolytic cell and the gas-liquid separator, the repair of a single electrolytic cell does not affect the normal use of other electrolytic cells, thereby reducing the impact of the repair process on production efficiency.

[0052] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An electrolytic cell maintenance safety control valve, characterized in that: include: A valve body, wherein flanges are provided at both ends of the valve body; A plurality of partitions are fixed at intervals inside the valve body and divide the inside of the valve body into a plurality of relatively independent chambers, and through holes are provided on the partitions; A valve stem, wherein a plurality of valve cores are arranged on the valve stem, and the plurality of valve cores are arranged in one-to-one correspondence with the plurality of through holes, and the closing and opening of the valve can be controlled by moving the valve cores and the through holes closer to and farther from each other; A driving mechanism is arranged on the upper part of the valve body and is used to drive the valve stem to rise and fall.

2. The electrolytic cell maintenance safety control valve according to claim 1, characterized in that: There are two partitions, namely a first partition and a second partition. The first partition divides the interior of the valve body into an upper inner cavity and a lower inner cavity. The through hole on the first partition is a first through hole. The second partition is fixed in the upper inner cavity and divides the upper inner cavity into a first upper inner cavity and a second upper inner cavity. The through hole on the second partition is a second through hole. The second through hole is located directly above the first through hole, and the size of the second through hole is larger than the size of the first through hole. There are two valve cores, namely a first valve core and a second valve core. The first valve core is located in the first upper inner cavity, and the second valve core is located in the second upper inner cavity. The first valve core is arranged in cooperation with the first through hole, and the second valve core is arranged in cooperation with the second through hole.

3. The electrolytic cell maintenance safety control valve according to claim 2, characterized in that: The first through hole and the second through hole are both inverted tapered through holes.

4. The electrolytic cell maintenance safety control valve according to claim 2, characterized in that: A sealing ring is disposed at each of the first through hole and the second through hole.

5. The electrolytic cell maintenance safety control valve according to claim 1, characterized in that: The driving mechanism comprises: A compartment, the compartment being arranged at an upper end of the valve body; A diaphragm, which is disposed inside the compartment and separates the compartment into an upper diaphragm cavity and a lower diaphragm cavity; An air inlet pipe, wherein a first end of the air inlet pipe is connected to an external air supply device, and a second end of the air inlet pipe is communicated with the compartment; A transmission sheet, the transmission sheet is fixedly connected to the surface of the diaphragm; A return spring is sleeved on the valve stem, and a first end of the return spring abuts against the transmission sheet, and a second end abuts against the lower end surface of the lower membrane cavity.

6. The electrolytic cell maintenance safety control valve according to claim 5, characterized in that: The air inlet pipe is gradually narrowed from the first end to the second end.

7. An electrolytic cell maintenance safety system, characterized in that: The electrolytic cell maintenance safety control valve according to any one of claims 1 to 6 is adopted, wherein a safety control valve is provided between the hydrogen outlet of the electrolytic cell and the hydrogen gas-water separation device, and between the oxygen outlet of the electrolytic cell and the oxygen gas-water separation device.

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