Low-pressure nitrogen protection control device
By designing a low-pressure nitrogen protection control device, the nitrogen leakage valve and solenoid valve are controlled by using pressure sensors and water level sensors, and the ultra-pure water is separated by combining the filter cartridge and baffle, the problem of nitrogen carrying ultra-pure water is solved, and the automatic recycling of ultra-pure water is achieved and waste is reduced.
Patent Information
- Application Number
- CN202421636487.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In the prior art, nitrogen may carry ultrapure water when discharged, resulting in waste of ultrapure water and lack of an automated recycling mechanism.
A low-pressure nitrogen protection control device is designed, including a tank body, an ultrapure water pump, a pressure control part, a filter cartridge, a solenoid valve and a water level sensor. The pressure sensor is used to monitor the pressure changes in the tank body, control the opening and closing of the nitrogen leakage valve and a nitrogen supply valve, and use the filter cartridge and the baffle to separate the ultrapure water in the nitrogen. The water level sensor controls the solenoid valve to achieve automatic return of ultrapure water.
Effectively prevent nitrogen from carrying ultrapure water, realize the automatic recycling of ultrapure water, reduce the waste of ultrapure water, and improve the degree of automation of the device.
Smart Images
Figure CN223174822U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nitrogen protection, in particular to a low-pressure nitrogen protection control device. Background Art
[0002] Low-pressure nitrogen protection is mainly used to keep the pressure of the protective gas at the top of the container constant, so as to avoid the direct contact between the materials in the container and air, prevent the evaporation and oxidation of the materials, and ensure the safety of the container. It is especially suitable for the gas seal protection system of large storage tanks. When the tank is feeding, the nitrogen discharge valve opens to release nitrogen to the outside, reducing the pressure in the tank; when the tank is discharging, the pressure in the tank decreases, and the nitrogen supply valve opens to inject nitrogen into the storage tank to increase the pressure in the tank.
[0003] Ultra-pure water is a pure solvent with a strong ability to dissolve these impurities. Since air contains impurities such as carbon dioxide, bacteria, and dust, once ultra-pure water comes into contact with air, the impurities will quickly dissolve into the ultra-pure water, resulting in a rapid decrease in the resistivity of the ultra-pure water. Therefore, a nitrogen protection device is required for storing ultra-pure water.
[0004] However, when ultra-pure water is added to the tank, nitrogen is discharged from the tank through the nitrogen discharge valve. Since nitrogen floats in the upper half of the tank and directly contacts the ultra-pure water, when nitrogen is discharged, it may carry some ultra-pure water, resulting in waste of ultra-pure water. Summary of the Utility Model
[0005] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a low-pressure nitrogen protection control device to solve the technical problems mentioned in the above background art.
[0006] The above technical purpose of the utility model is achieved through the following technical solutions:
[0007] A low-pressure nitrogen protection control device includes a tank body and an ultra-pure water pump located on one side of the tank body. The output end of the ultra-pure water pump communicates with the lower half of the tank body. A pressure control part is arranged at the top of the tank body. A top shell is fixedly connected to the top of the tank body. A reflux pipe is fixedly penetrated through the lower half of one side of the top shell. The reflux pipe communicates with the upper half of one side of the tank body. An electromagnetic valve is arranged on the outer peripheral side of the reflux pipe. A top ring is rotatably connected to the top of the top shell. A filter cylinder is fixedly connected to the bottom of the top ring. The top of the filter cylinder is open. A driving part is arranged above the filter cylinder. An exhaust pipe is fixedly penetrated through the top of the top shell. The bottom end of the exhaust pipe extends to the upper half of the filter cylinder.
[0008] Further, the pressure control part includes a nitrogen input pipe and a nitrogen output pipe fixedly penetrating through the top of the tank body. A nitrogen supply valve and a nitrogen discharge valve are respectively fixedly sleeved on the outer peripheral sides of the nitrogen input pipe and the nitrogen output pipe. One end of the nitrogen output pipe far away from the tank body extends into the top shell. A pressure sensor is fixedly penetrated through the top of the tank body, and a controller is fixedly connected to the top of the tank body. The pressure sensor, the nitrogen supply valve and the nitrogen discharge valve are all electrically connected to the controller.
[0009] Further, the driving part includes a motor fixedly connected to the top of the top shell. A vertical rod is fixedly connected to the inner bottom wall of the filter cartridge. The vertical rod rotatably penetrates through the inner top wall of the top shell and extends above the top shell. The vertical rod is in transmission connection with the output end of the motor through a bevel gear set.
[0010] Further, a baffle is fixedly connected to the inner wall of the top shell corresponding to the nitrogen output pipe. A gap is left between the baffle and the nitrogen output pipe.
[0011] Further, a one-way valve is fixedly sleeved on the outer peripheral side of the exhaust pipe.
[0012] Further, a water level sensor is fixedly connected to the inner bottom wall of the top shell. The water level sensor and the solenoid valve are both electrically connected to the controller.
[0013] In summary, the present utility model includes at least one of the following beneficial technical effects:
[0014] 1. For this low-pressure nitrogen protection control device, when the ultrapure water pump adds ultrapure water into the tank body, the air pressure sensor monitors the rising pressure in the tank body and controls the nitrogen discharge valve to open. Nitrogen enters the top shell through the nitrogen output pipe, impacts on the baffle, and the ultrapure water falls under the action of gravity. Nitrogen rises and passes through the filter cartridge, and the ultrapure water in the nitrogen is blocked by the filter cartridge, thereby preventing the waste of ultrapure water caused by nitrogen carrying ultrapure water out.
[0015] 2. For this low-pressure nitrogen protection control device, when the water level sensor monitors that there is more ultrapure water accumulated at the bottom of the top shell, the controller controls the solenoid valve to open, so that the ultrapure water flows back into the tank body through the return pipe, and then the solenoid valve is closed, improving the automation degree of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0017] Figure 1It is a three-dimensional view of a low-pressure nitrogen protection control device according to this embodiment;
[0018] Figure 2 It is a front sectional view of the top shell in a low-pressure nitrogen protection control device according to this embodiment;
[0019] Figure 3 It is this embodiment Figure 2 An enlarged view of part A.
[0020] In the figure, 1. Tank body; 2. Ultra-pure water pump; 3. Pressure control part; 31. Nitrogen input pipe; 32. Nitrogen output pipe; 33. Nitrogen supply valve; 34. Nitrogen discharge valve; 35. Pressure sensor; 36. Controller; 4. Top shell; 5. Return pipe; 6. Solenoid valve; 7. Top ring; 8. Filter cartridge; 9. Driving part; 91. Vertical rod; 92. Motor; 93. Bevel gear set; 10. Exhaust pipe; 11. Baffle; 12. Check valve; 13. Water level sensor. Specific implementation mode
[0021] The following further describes the present utility model in detail with reference to the accompanying drawings.
[0022] Embodiment:
[0023] Refer to Figures 1 to 3 As shown in the figure, a low-pressure nitrogen protection control device disclosed by the present utility model includes a tank body 1 and an ultra-pure water pump 2 located on one side of the tank body 1. The output end of the ultra-pure water pump 2 communicates with the lower half of the tank body 1. A pressure control part 3 is arranged at the top of the tank body 1. A top shell 4 is fixedly connected to the top of the tank body 1. A return pipe 5 is fixedly penetrated through the lower half of one side of the top shell 4. The return pipe 5 communicates with the upper half of one side of the tank body 1. And a solenoid valve 6 is arranged on the outer peripheral side of the return pipe 5. A top ring 7 is rotatably connected to the top of the top shell 4. A filter cartridge 8 is fixedly connected to the bottom of the top ring 7. The top of the filter cartridge 8 is open. A driving part 9 is arranged above the filter cartridge 8. An exhaust pipe 10 is fixedly penetrated through the top of the top shell 4. The bottom end of the exhaust pipe 10 extends to the upper half of the inside of the filter cartridge 8.
[0024] In this embodiment, one end of the nitrogen input pipe 31 far away from the tank body 1 is communicated with a nitrogen generating device. When adding or taking out ultra-pure water from the tank body 1, the pressure control part 3 controls the nitrogen to enter and exit the tank body 1 to maintain the normal pressure inside the tank body 1. In the initial state, the solenoid valve 6 is in a closed state.
[0025] In a further preferred embodiment of the present utility model, as shown in Figure 1As shown in the figure, the pressure control unit 3 includes a nitrogen input pipe 31 and a nitrogen output pipe 32 fixedly penetrating through the top of the tank body 1. A nitrogen supply valve 33 and a nitrogen discharge valve 34 are fixedly sleeved on the outer peripheral sides of the nitrogen input pipe 31 and the nitrogen output pipe 32 respectively. One end of the nitrogen output pipe 32 far from the tank body 1 extends into the top shell 4. A pressure sensor 35 is fixedly penetrating through the top of the tank body 1, and a controller 36 is fixedly connected to the top of the tank body 1. The pressure sensor 35, the nitrogen supply valve 33, and the nitrogen discharge valve 34 are all electrically connected to the controller 36.
[0026] In this embodiment, in the initial state, both the nitrogen supply valve 33 and the nitrogen discharge valve 34 are in the closed state. When the worker takes out the ultrapure water in the tank body 1, the air pressure in the tank body 1 decreases. The air pressure sensor monitors the air pressure change and controls the pressure supply valve to open to add nitrogen into the tank body 1. When the worker adds ultrapure water into the tank body 1 through the ultrapure water pump 2, the air pressure in the tank body 1 increases. The air pressure sensor monitors the air pressure change and controls the pressure relief valve to open. Part of the nitrogen in the tank body 1 enters the top shell 4 through the nitrogen output pipe 32.
[0027] After the nitrogen enters the top shell 4, it moves upward and passes through the filter cartridge 8, and then is discharged from the top shell 4 through the exhaust pipe 10. The ultrapure water mixed in the nitrogen cannot pass through the filter cartridge 8, so it is retained on the outer surface of the filter cartridge 8.
[0028] When the driving part 9 works, it drives the filter cartridge 8 to rotate. Therefore, the ultrapure water on the outer surface of the filter cartridge 8 is thrown out under the action of centrifugal force and accumulates at the lower half part inside the top shell 4.
[0029] In a further preferred embodiment of the present utility model, as Figure 2 shown, the driving part 9 includes a motor 92 fixedly connected to the top of the top shell 4. A vertical rod 91 is fixedly connected to the inner bottom wall of the filter cartridge 8. The vertical rod 91 rotatably penetrates through the inner top wall of the top shell 4 and extends above the top shell 4. The vertical rod 91 is drivingly connected to the output end of the motor 92 through a bevel gear set 93.
[0030] In this embodiment, when the motor works, it drives the vertical rod 91 to rotate through the bevel gear set 93, and the vertical rod 91 drives the filter cartridge 8 and the top ring 7 to rotate. The rotation of the filter cartridge 8 throws out the ultrapure water. The motor 92 is electrically connected to the controller 36, and the controller 36 controls the motor 92 to start once every other period of time instead of working all the time, reducing energy waste.
[0031] In a further preferred embodiment of the present utility model, as Figure 2 shown, a baffle 11 is fixedly connected to the inner wall of the top shell 4 corresponding to the nitrogen output pipe 32. A gap is left between the baffle 11 and the nitrogen output pipe 32.
[0032] In this embodiment, after the nitrogen gas is discharged from the nitrogen gas output pipe 32, it directly impacts on the baffle 11. Therefore, the kinetic energy of the nitrogen gas is consumed, and part of the ultrapure water in the nitrogen gas will directly fall along the baffle 11 under the action of gravity, further improving the separation effect of the ultrapure water in the nitrogen gas.
[0033] In a further preferred embodiment of the present invention, as Figure 2 shown, a one-way valve 12 is fixedly sleeved on the outer peripheral side of the exhaust pipe 10.
[0034] In this embodiment, the one-way valve 12 only allows the air flow to move from the filter cartridge 8 through the exhaust pipe 10 to the outside of the top shell 4, and cannot move in the reverse direction, preventing the outside air from entering the top shell 4 through the exhaust pipe 10 and polluting the ultrapure water in the top shell 4.
[0035] The inside of the top shell 4 is completely a nitrogen environment.
[0036] In a further preferred embodiment of the present invention, as Figure 2 shown, a water level sensor 13 is fixedly connected to the inner bottom wall of the top shell 4, and both the water level sensor 13 and the solenoid valve 6 are electrically connected to the controller 36.
[0037] In this embodiment, when the water level sensor 13 detects that there is a large amount of ultrapure water accumulated at the bottom of the top shell 4, the solenoid valve 6 is controlled to open through the controller 36, so that the ultrapure water flows back into the tank body 1 through the return pipe 5, realizing the automatic recovery of the ultrapure water, and then the solenoid valve 6 is closed.
[0038] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.
Claims
1. A low-pressure nitrogen protection control device, comprising a tank body (1) and an ultrapure water pump (2) located on one side of the tank body (1), the output end of the ultrapure water pump (2) communicating with the lower half of the tank body (1), characterized in that: A pressure control part (3) is provided at the top of the tank body (1). A top shell (4) is fixedly connected to the top of the tank body (1). A reflux pipe (5) is fixedly penetrated through the lower half of one side of the top shell (4). The reflux pipe (5) communicates with the upper half of one side of the tank body (1). An electromagnetic valve (6) is arranged on the outer peripheral side of the reflux pipe (5). A top ring (7) is rotatably connected to the top of the top shell (4). A filter cylinder (8) is fixedly connected to the bottom of the top ring (7). The top of the filter cylinder (8) is open. A driving part (9) is arranged above the filter cylinder (8). An exhaust pipe (10) is fixedly penetrated through the top of the top shell (4). The bottom end of the exhaust pipe (10) extends to the upper half of the inside of the filter cylinder (8).
2. The low-pressure nitrogen protection control device according to claim 1, characterized in that: The pressure control part (3) includes a nitrogen input pipe (31) and a nitrogen output pipe (32) fixedly penetrated through the top of the tank body (1). A nitrogen supply valve (33) and a nitrogen discharge valve (34) are respectively fixedly sleeved on the outer peripheral sides of the nitrogen input pipe (31) and the nitrogen output pipe (32). One end of the nitrogen output pipe (32) far away from the tank body (1) extends into the top shell (4). A pressure sensor (35) is fixedly penetrated through the top of the tank body (1). A controller (36) is fixedly connected to the top of the tank body (1). The pressure sensor (35), the nitrogen supply valve (33) and the nitrogen discharge valve (34) are all electrically connected to the controller (36).
3. The low-pressure nitrogen protection control device according to claim 2, characterized in that: The driving part (9) includes a motor (92) fixedly connected to the top of the top shell (4). A vertical rod (91) is fixedly connected to the inner bottom wall of the filter cylinder (8). The vertical rod (91) rotatably penetrates through the inner top wall of the top shell (4) and extends above the top shell (4). The vertical rod (91) is in transmission connection with the output end of the motor (92) through a bevel gear set (93).
4. A low-pressure nitrogen protection control device according to claim 3, characterized in that: A baffle (11) is fixedly connected to the inner wall of the top shell (4) corresponding to the nitrogen output pipe (32). A gap is left between the baffle (11) and the nitrogen output pipe (32).
5. A low-pressure nitrogen protection control device according to claim 4, characterized in that: A one-way valve (12) is fixedly sleeved on the outer peripheral side of the exhaust pipe (10).
6. The low-pressure nitrogen protection control device according to claim 5, wherein: A water level sensor (13) is fixedly connected to the inner bottom wall of the top shell (4). The water level sensor (13) and the electromagnetic valve (6) are both electrically connected to the controller (36).