Hydrogen and nitrogen mixed gas control device

Abstract

The utility model discloses a hydrogen-nitrogen mixed gas control device, relates to hydrogen-nitrogen mixed gas control device technical field, including mixing box, the left side and right side of mixing box inner surface middle part are both fixedly equipped with the separator plate, the surface upper side of separator plate is equipped with the first air hole, and the surface lower side of right side separator plate is equipped with the second air hole, the second air hole is equipped with the second air hole. A piston is slidably attached to the middle of the partition plate, and a through cavity is formed in the surface of the piston. Compared with an existing common hydrogen-nitrogen mixed gas control device, the hydrogen-nitrogen mixed gas control device has the advantages that hydrogen can be injected only when nitrogen is injected firstly, the situation that reducing gas is not diluted by inert gas and enters an equipment end can be avoided, danger is greatly prevented, and meanwhile, when the nitrogen supply amount is insufficient and the pressure borne by the piston is reduced, the nitrogen can be injected into the equipment end. And under the action of the telescopic spring, the piston is gradually pushed downwards, so that the air hole I and the air hole II are blocked, a hydrogen inlet path is cut off and blocked, automatic cut-off is realized, and effective protection measures are taken.

Description

Technical Field

[0001] This utility model relates to the technical field of hydrogen-nitrogen mixed gas control devices, specifically a hydrogen-nitrogen mixed gas control device. Background Technology

[0002] In metallurgical industry operations, reducing gases (such as hydrogen) or inert gases (such as nitrogen) or mixtures thereof are typically used as protective gases to ensure that the heat treatment process (sintering, annealing, quenching) or the product is not oxidized, thereby obtaining good quality.

[0003] Protective gases are typically supplied by gas companies, such as liquid nitrogen or high-pressure hydrogen, to storage facilities at the application site. They are then vaporized and mixed before being supplied to the equipment to protect heated objects or devices. Reducing gases are flammable and explosive, posing a risk of combustion and explosion during use. While adding inert gases can reduce these risks, this can be mitigated.

[0004] However, in the mixing operation of hydrogen and nitrogen, the mixing operation using a proportioner is inevitably subject to equipment factors and human factors, which may result in insufficient or no addition of inert gas. A large amount of reducing gas flows directly into the equipment, increasing the risk of safety hazards.

[0005] Therefore, in view of this, we have studied and improved the existing structure to address its shortcomings, and proposed a hydrogen-nitrogen mixed gas control device. Utility Model Content

[0006] The purpose of this invention is to provide a hydrogen-nitrogen mixed gas control device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen-nitrogen mixed gas control device, comprising a mixing chamber, wherein partitions are fixedly installed on both the left and right sides of the inner surface of the mixing chamber, and air holes are provided on the upper surface of each partition, and air holes are provided on the lower surface of the right partition, wherein a piston is slidably fitted in the middle of the partition, and a through cavity is provided on the surface of the piston, wherein a telescopic spring is fixedly installed on the upper end of the piston, wherein a hydrogen inlet valve is fixedly installed on the lower outer surface of the mixing chamber at the leftmost position of the partition, and a nitrogen inlet valve is fixedly installed on the lower outer surface of the mixing chamber at the middle position of the partition.

[0008] Preferably, the pores on the surface of the partition are located on the same horizontal line, and the size of the cavity matches the size of the pores.

[0009] Preferably, an exhaust pipe is fixedly provided on the right end of the outer surface of the mixing box, and a pressure sealing mechanism is provided on the inner surface of the exhaust pipe.

[0010] Preferably, the pressure sealing mechanism includes a crossbeam fixedly installed on the right side of the inner surface of the exhaust pipe, and a ring plate fixedly installed on the left side of the crossbeam on the inner surface of the exhaust pipe.

[0011] Preferably, the pressure sealing mechanism further includes a guide rod fixedly installed on the left side of the crossbeam, and a thrust spring is fixedly installed on the left side of the crossbeam around the guide rod.

[0012] Preferably, the pressure sealing mechanism further includes a sealing plug fixedly installed at the left end of the thrust spring, the sealing plug being tightly fitted to the ring plate and slidingly passing through it, and the sealing plug being slidably sleeved on the surface of the guide rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, through the arrangement of a partition, vent one, vent two, piston, through cavity, and telescopic spring, allows the nitrogen inlet valve to open simultaneously with the hydrogen inlet valve. The nitrogen injection pressure pushes the piston upward, compressing the telescopic spring. At this time, the through cavity remains connected to vent one, and vent two is also open. Nitrogen enters the rightmost side of the partition through vent two, while hydrogen moves from the leftmost side of the partition to the rightmost side through vent one and the through cavity, effectively mixing with the nitrogen. Only when nitrogen is injected first can hydrogen be injected. This arrangement can prevent reducing gases from entering the equipment without being diluted by inert gases, greatly preventing danger. At the same time, when the nitrogen supply is insufficient, the piston is subjected to less pressure, and under the action of the telescopic spring, it will gradually push the piston downward, thereby blocking vent one and vent two, cutting off the hydrogen inlet path, thus achieving automatic cut-off and providing effective protection.

[0015] 2. This utility model, through the arrangement of a pressure sealing mechanism, a crossbeam, a ring plate, a guide rod, a thrust spring, and a sealing plug, allows the thrust spring, under its own elastic force, to push the sealing plug to seal the ring plate, thereby sealing the exhaust pipe. Nitrogen and hydrogen can remain on the far right side of the partition for a period of time to fully mix and reach a certain pressure value before pushing the sealing plug to open the ring plate, allowing the fully mixed gas to enter the equipment end. This effectively ensures that the gas entering the equipment end is fully and evenly mixed, significantly improving safety and preventing accidents. At the same time, when the nitrogen supply is insufficient, a small amount of hydrogen and nitrogen will enter the far right cavity before the piston closes. At this time, the pressure cannot open the sealing plug, thus also ensuring that insufficiently mixed hydrogen and nitrogen enter the equipment end, further improving safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall cross-sectional view of the piston moving upward and opening structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall cross-sectional view of the piston moving downward and closing structure of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Mixing box; 2. Baffle plate; 3. Air vent one; 4. Air vent two; 5. Piston; 6. Through cavity; 7. Telescopic spring; 8. Hydrogen inlet valve; 9. Nitrogen inlet valve; 10. Exhaust pipe; 11. Pressure sealing mechanism; 1101. Cross frame; 1102. Ring plate; 1103. Guide rod; 1104. Thrust spring; 1105. Sealing plug. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-2 As shown, a hydrogen-nitrogen mixed gas control device includes a mixing chamber 1. Partitions 2 are fixedly installed on both the left and right sides of the inner surface of the mixing chamber 1. A vent 3 is opened on the upper surface of each partition 2, and a vent 4 is opened on the lower surface of the right partition 2. A piston 5 is slidably fitted in the middle of the partition 2. A cavity 6 is opened on the surface of the piston 5. A telescopic spring 7 is fixedly installed on the upper end of the piston 5. A hydrogen inlet valve 8 is fixedly installed on the lower outer surface of the mixing chamber 1 at the leftmost side of the partition 2. A nitrogen inlet valve 9 is fixedly installed on the lower outer surface of the mixing chamber 1 at the middle of the partition 2.

[0023] The pores 3 on the surface of the partition 2 are located on the same horizontal line, and the size of the cavity 6 matches that of the pores 3.

[0024] By adopting the above technical solution, the nitrogen inlet valve 9 is opened, and the hydrogen inlet valve 8 is opened simultaneously. The nitrogen injection pressure will push the piston 5 upward and squeeze the telescopic spring 7. At this time, the passage cavity 6 will be connected with the first vent 3, and the second vent 4 will also be in the open state. The nitrogen will enter the rightmost side of the partition 2 through the second vent 4, while the hydrogen will move from the leftmost side of the partition 2 to the rightmost side through the first vent 3 and the passage cavity 6, and effectively mix with the nitrogen.

[0025] Only after nitrogen is injected can hydrogen be injected. This design prevents reducing gases from entering the equipment without being diluted by inert gases.

[0026] When the nitrogen supply is insufficient, the piston 5 is subjected to less pressure. Under the action of the extension spring 7, the piston 5 will gradually be pushed downward, thereby blocking the gas hole 3 and the gas hole 4, cutting off the hydrogen intake path, thus achieving automatic shut-off.

[0027] like Figures 3-4 As shown, an exhaust pipe 10 is fixedly installed on the right end of the outer surface of the mixing box 1, and a pressure sealing mechanism 11 is installed on the inner surface of the exhaust pipe 10.

[0028] Furthermore, the pressure sealing mechanism 11 includes a crossbeam 1101 fixedly installed on the right side of the inner surface of the exhaust pipe 10, and an annular plate 1102 fixedly installed on the left side of the crossbeam 1101 on the inner surface of the exhaust pipe 10.

[0029] The pressure sealing mechanism 11 also includes a guide rod 1103 fixedly installed on the left side of the surface of the cross frame 1101, and a thrust spring 1104 fixedly installed on the left side of the surface of the cross frame 1101 around the guide rod 1103.

[0030] The pressure sealing mechanism 11 also includes a sealing plug 1105 fixedly installed at the left end of the thrust spring 1104. The sealing plug 1105 is tightly attached to the ring plate 1102 and slides through it. The sealing plug 1105 is slidably sleeved on the surface of the guide rod 1103.

[0031] By adopting the above technical solution, the thrust spring 1104 will push the sealing plug 1105 to block the sealing ring plate 1102 under its own elastic force, thereby blocking the exhaust pipe 10;

[0032] Nitrogen and hydrogen can stay on the far right of partition 2 for a period of time to mix thoroughly and reach a certain pressure value before they can push the sealing plug 1105 to open the ring plate 1102 and allow the fully mixed gas to enter the equipment end.

[0033] When the nitrogen supply is insufficient, a small amount of hydrogen and nitrogen will enter the rightmost cavity before piston 5 closes. At this time, the pressure is not enough to open the sealing plug 1105, thus ensuring that the hydrogen and nitrogen that are not fully mixed enter the equipment.

[0034] Working principle: When using this hydrogen-nitrogen mixed gas control device, firstly, the nitrogen inlet valve 9 opens, and simultaneously the hydrogen inlet valve 8 opens. The nitrogen injection pressure pushes the piston 5 upward, compressing the telescopic spring 7. At this time, the passage cavity 6 remains connected to the first vent 3, and the second vent 4 is also open. Nitrogen enters the rightmost side of the partition 2 through the second vent 4, while hydrogen moves from the leftmost side of the partition 2 to the rightmost side through the first vent 3 and the passage cavity 6, effectively mixing with the nitrogen. Under its own elastic force, the thrust spring 1104 pushes the sealing plug 1105 to seal the sealing ring plate 1102, thereby sealing the exhaust pipe 10. Nitrogen and hydrogen can then remain on the rightmost side of the partition 2. After a period of time, the gas is fully mixed and reaches a certain pressure value before the sealing plug 1105 can be pushed to open the ring plate 1102, allowing the fully mixed gas to enter the equipment end. When the nitrogen supply is insufficient, the piston 5 is subjected to less pressure. Under the action of the extension spring 7, the piston 5 will gradually be pushed downward, thereby blocking the gas hole 3 and the gas hole 4, cutting off the hydrogen intake path. At the same time, when the nitrogen supply is insufficient, before the piston 5 closes, a small amount of hydrogen and nitrogen will enter the rightmost cavity. At this time, the pressure cannot open the sealing plug 1105, thus ensuring that the insufficiently mixed hydrogen and nitrogen enter the equipment end. This is the working principle of the hydrogen-nitrogen mixed gas control device.

Claims

1. A hydrogen-nitrogen gas mixture control device comprising a mixing tank (1), characterized by, The inner surface of the mixing box (1) is fixedly installed with a baffle (2) on both sides of the middle part, the surface of the baffle (2) is provided with an air hole one (3) on the upper side, and the surface of the right baffle (2) is provided with an air hole two (4) on the lower side, the middle part of the baffle (2) is slidably connected with a piston (5), the surface of the piston (5) is provided with a through cavity (6), the upper end of the piston (5) is fixedly installed with an extension spring (7), the lower surface of the mixing box (1) is fixedly provided with a hydrogen inlet valve (8) on the leftmost side of the baffle (2), and the lower surface of the mixing box (1) is fixedly installed with a nitrogen inlet valve (9) on the middle part of the baffle (2).

2. The hydrogen-nitrogen gas mixture control device according to claim 1, wherein The air hole one (3) on the surface of the baffle (2) is located on the same horizontal line, and the size of the through cavity (6) matches the air hole one (3).

3. The hydrogen-nitrogen gas mixture control device according to claim 1, wherein The outer surface of the mixing box (1) is fixedly provided with an exhaust pipe (10) at the right end, and the inner surface of the exhaust pipe (10) is provided with a pressure sealing mechanism (11).

4. The hydrogen-nitrogen gas mixture control device according to claim 3, wherein The pressure sealing mechanism (11) comprises a horizontal frame (1101) fixedly installed on the right side of the inner surface of the exhaust pipe (10), and the left side of the horizontal frame (1101) is fixedly installed with a ring plate (1102) on the inner surface of the exhaust pipe (10).

5. The hydrogen-nitrogen gas mixture control device according to claim 3, wherein The pressure sealing mechanism (11) further comprises a guide rod (1103) fixedly installed on the left side of the surface of the horizontal frame (1101), and the left side of the surface of the horizontal frame (1101) is fixedly installed with a push spring (1104) on the outer periphery of the guide rod (1103).

6. The hydrogen-nitrogen gas mixture control device according to claim 3, wherein The pressure sealing mechanism (11) further comprises a sealing plug (1105) fixedly installed on the left end of the push spring (1104), and the sealing plug (1105) is slidably connected with the ring plate (1102) and penetrates the ring plate (1102), and the sealing plug (1105) is slidably connected with the surface of the guide rod (1103).

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