Nitrogen sealing device with low nitrogen consumption

Abstract

The utility model discloses a nitrogen seal device of low nitrogen consumption. A nitrogen seal device of low nitrogen consumption includes pure water tank, the top of pure water tank is connected with air inlet pipe and water inlet pipe respectively, the bottom of pure water tank is provided with water outlet pipe, the top of pure water tank still is provided with nitrogen gas intercommunication pipe, one end of nitrogen gas intercommunication pipe is connected with gas storage device for storing nitrogen gas away from pure water tank, the gas storage device includes gasbag for storing nitrogen gas, containing jar for placing gasbag and pressure mechanism, the pressure mechanism is used for exerting pressure to gasbag, the gasbag has air inlet nozzle, the containing jar is provided with fixed mechanism for connecting air inlet nozzle and nitrogen gas intercommunication pipe. The utility model discloses a nitrogen seal device of low nitrogen consumption can automatically supplement nitrogen gas for pure water tank and collect the nitrogen gas of pure water tank excess, effectively avoid nitrogen gas to be wasted, has reduced the consumption of nitrogen gas.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen-sealed water tank technology, and in particular to a nitrogen-sealing device with low nitrogen consumption. Background Technology

[0002] In ultrapure water preparation and storage systems, nitrogen-sealed water tanks are crucial equipment for ensuring stable water quality. Their core function is to create a physical barrier using high-purity nitrogen, blocking contact between ultrapure water and impurities such as carbon dioxide in the atmosphere. However, traditional nitrogen-sealed water tanks face significant nitrogen waste in actual operation. When the tank level changes due to fluctuations in inlet and outlet water flow, the nitrogen volume changes accordingly, requiring frequent replenishment or release of nitrogen to maintain pressure stability. This leads to nitrogen consumption far exceeding theoretical values. Furthermore, existing nitrogen-sealed water tanks lack effective nitrogen recovery and reuse mechanisms. Excessive nitrogen replenishment can cause excessive internal pressure, potentially leading to safety risks or equipment damage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a nitrogen sealing device with low nitrogen consumption that can automatically collect and replenish nitrogen.

[0004] To address the aforementioned problems, this utility model provides a nitrogen sealing device with low nitrogen consumption. The device includes a pure water tank, with an air inlet pipe and a water inlet pipe connected to the top of the tank, and a water outlet pipe at the bottom. A nitrogen interconnect pipe is also provided on the top of the pure water tank. The end of the nitrogen interconnect pipe furthest from the pure water tank is connected to a nitrogen storage device. The storage device includes a nitrogen bladder, a container for holding the bladder, and a pressure mechanism. The pressure mechanism applies pressure to the bladder. The bladder has an air inlet, and the container has a fixing mechanism for connecting the air inlet to the nitrogen interconnect pipe.

[0005] Furthermore, the fixing mechanism includes a connecting pipe and a fixing pipe for mutually clamping the air inlet nozzle, and a clamp for tightening the connecting pipe. The fixing pipe is installed on the receiving tank and communicates with the inside of the receiving tank. The air inlet nozzle is located inside the fixing pipe, and the front end of the air inlet nozzle is turned outward and wrapped around the fixing pipe. The connecting pipe is used to connect to the nitrogen interconnection pipe. A clamping strip is provided on the connecting pipe. The clamping strip presses on the outward part of the air inlet nozzle, and the clamp is located on the clamping strip.

[0006] Furthermore, the fixing tube is provided with a recessed portion that is recessed towards the center of the fixing tube, and the clamping strip is provided with a protrusion that matches the recessed portion, the protrusion protruding towards the fixing tube.

[0007] Furthermore, the connecting pipe is provided with a flange for connecting to the nitrogen interconnect pipe.

[0008] Furthermore, the fixing tube is installed at the bottom of the container.

[0009] Furthermore, the pressure mechanism includes a pressure plate for pressing onto the airbag, a gas spring for applying pressure to the pressure plate, and a mounting bracket for mounting the gas spring. The mounting bracket is mounted on the receiving tank, and the lower end of the gas spring is connected to the pressure plate.

[0010] Furthermore, the intake pipe is also equipped with an electromagnetic flow meter for measuring the nitrogen flow rate.

[0011] Furthermore, the pure water tank is equipped with a level sensor for detecting the pure water level.

[0012] Furthermore, a first flow sensor for detecting the flow rate of the inlet pipe is provided on the inlet pipe, and a second flow sensor for detecting the flow rate of the outlet pipe is provided on the outlet pipe.

[0013] Furthermore, the top of the pure water tank is also equipped with a pressure relief valve for depressurization and a pressure sensor for detecting nitrogen pressure.

[0014] This utility model discloses a nitrogen sealing device with low nitrogen consumption. By setting a nitrogen connection channel at the top of the pure water tank to connect to a gas storage device, it can collect and replenish nitrogen according to changes in the liquid level in the pure water tank. When the liquid level in the pure water tank rises, the nitrogen pressure in the pure water tank increases, and the nitrogen in the pure water tank enters the gas bladder for storage through the nitrogen interconnection pipe. When the liquid level in the pure water tank drops, the nitrogen pressure in the pure water tank decreases, and the nitrogen in the gas bladder enters the pure water tank through the nitrogen interconnection pipe under the action of the pressure mechanism. This solves the problem of large amounts of waste caused by the frequent replenishment and discharge of nitrogen due to liquid level fluctuations in traditional nitrogen sealing tanks, effectively reducing nitrogen consumption and lowering operating costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of a nitrogen sealing device with low nitrogen consumption according to the present invention.

[0016] Figure 2 This is a schematic diagram of the gas storage device.

[0017] Figure 3 yes Figure 2 A magnified view of part A in the image.

[0018] The meanings of the labels in the attached diagram are as follows:

[0019] Pure water tank 1, air inlet pipe 11, electromagnetic flow meter 111, water inlet pipe 12, first flow sensor 121, water outlet pipe 13, second flow sensor 131, nitrogen interconnect pipe 14, liquid level sensor 15, pressure relief valve 16, pressure sensor 17, gas storage device 2, air bag 21, air inlet 211, container tank 22, pressure mechanism 23, pressure plate 231, gas spring 232, mounting bracket 233, fixing mechanism 24, connecting pipe 241, protrusion 2411, flange 2412, fixing pipe 242, clamp 243, pressing strip 244. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, a preferred embodiment of the nitrogen sealing device with low nitrogen consumption of this utility model includes a pure water tank 1 and a gas storage device 2. The top of the pure water tank 1 is connected to an air inlet pipe 11, a water inlet pipe 12, and a nitrogen interconnect pipe 14. The air inlet pipe 11 is used to connect to an external nitrogen source to supply nitrogen to the pure water tank 1. An electromagnetic flow meter 111 is also installed on the air inlet pipe 11 to measure the nitrogen flow rate, facilitating real-time monitoring of the nitrogen intake. The water inlet pipe 12 is used to connect to external pure water production equipment to supply pure water to the pure water tank 1. A first flow sensor 121 is installed on the water inlet pipe 12 to detect the flow rate, and a second flow sensor 131 is installed on the water outlet pipe 13 to detect the flow rate. The difference between the inlet and outlet flow rates can be used to understand the pure water consumption, providing the necessary data for pure water production. The pure water tank 1 is equipped with a level sensor 15 for detecting the pure water level, allowing for real-time monitoring of the pure water content. The top of the pure water tank is also equipped with a pressure relief valve 16 and a pressure sensor 17 for detecting nitrogen pressure. When the nitrogen pressure in the pure water tank exceeds a predetermined value, the pressure relief valve 16 opens to release the nitrogen. The pressure relief valve 16 prevents accidents caused by excessive nitrogen pressure, improving safety. The pressure sensor 17 allows for real-time monitoring of nitrogen pressure. Normally, the nitrogen pressure in the pure water tank 1 remains constant or fluctuates only slightly. Excessive or insufficient nitrogen pressure indicates either too much or too little nitrogen supply, or that the gas bladder 21 is unable to receive or supply nitrogen, suggesting a problem requiring maintenance. The end of the nitrogen interconnect pipe 14 furthest from the pure water tank 1 is connected to the gas storage device 2. This gas storage device collects excess nitrogen from the pure water tank 1 and replenishes nitrogen as needed. The bottom of the pure water tank 1 is provided with a water outlet pipe 13, which is used to discharge the pure water tank 1 to supply pure water to subsequent equipment.

[0022] like Figure 2As shown, the gas storage device 2 includes an air bladder 21, a container 22, and a pressure mechanism 23. The air bladder 21 is used to store nitrogen gas. It should be noted that the air bladder 21 is generally chosen to be the same size as the container 22, so that the air bladder 21 does not need to be deformed, only its sealing performance is required. The air bladder 21 has an air inlet 211, which is connected to a nitrogen interconnection pipe 14, facilitating the entry and exit of nitrogen gas into the air bladder 21. The air bladder 21 is placed inside the container 22. The pressure mechanism 23 is installed on the container 22. The pressure mechanism 23 is used to apply pressure to the air bladder 21, ensuring that the air bladder 21 has a certain pressure, enabling nitrogen to be delivered into the pure water tank 1 when needed. Initially, the pressure of the pressure mechanism 23 is the same as the nitrogen pressure in the pure water tank. It should be noted that during initial use, the air bladder 21 stores a certain amount of nitrogen gas, ensuring that the air bladder 21 can replenish nitrogen gas to the pure water tank 1 when needed. When the liquid level in the pure water tank 1 decreases, the space for storing nitrogen increases, leading to a decrease in nitrogen pressure within the tank. At this time, the air bladder 21, under the action of the pressure mechanism 23, forces nitrogen into the pure water tank 1, ensuring sufficient nitrogen without the need for additional nitrogen. Conversely, when the liquid level in the pure water tank 1 increases, the space for storing nitrogen decreases, leading to an increase in nitrogen pressure. In this case, the nitrogen pressure inside the air bladder 21 is lower than the nitrogen pressure in the pure water tank 1, causing the nitrogen in the tank to move towards the air bladder 21, thus collecting nitrogen without the need to discharge excess nitrogen.

[0023] The pressure mechanism 23 includes a pressure plate 231, a gas spring 232, and a mounting bracket 233. The mounting bracket 233 is installed on the top of the receiving tank 22. The upper end of the gas spring 232 is connected to the mounting bracket 233, and the lower end of the gas spring 232 is connected to the pressure plate 231. The gas spring 232 is used to apply pressure to the pressure plate 231. To increase the pressure, multiple gas springs 232 are provided. The number of gas springs 232 can be reduced or increased as needed. The pressure plate 231 presses against the air bladder 21. The pressure plate 231 is used to transmit pressure to the air bladder 21. Generally, the pressure plate 231 is set to have the same inner diameter as the receiving tank 22 to ensure that the pressure plate 231 can completely press the air bladder 21, avoiding the air bladder 21 being trapped between the pressure plate 231 and the receiving tank 22 and damaged. At the same time, it can also supply all the nitrogen in the air bladder 21 to the pure water tank 1.

[0024] like Figure 3As shown, a fixing mechanism 24 is provided on the container 22, which is used to connect the air inlet 211 to the nitrogen interconnect pipe 14. The fixing mechanism 24 includes a connecting pipe 241, a fixing pipe 242 and a clamp 243. The fixing pipe 242 is installed at the bottom of the container 22 and communicates with the interior of the container 22. The air inlet 211 is located inside the fixed pipe 242, and the front end of the air inlet 211 is turned outward and wrapped around the fixed pipe 242. The connecting pipe 241 is sleeved on the turned-out air inlet. The connecting pipe 241 is provided with a clamping strip 244. There are multiple clamping strips 244, which are evenly distributed on the connecting pipe 241. The clamping strips 244 press on the turned-out part of the air inlet 211. The clamp 243 is provided on the clamping strip 244. The clamping strip 244 is provided with a positioning groove. The clamp 243 is located in the positioning groove to ensure that the clamp 243 will not move. The connecting pipe 241 is used to connect with the nitrogen interconnect pipe 14. Usually, a flange 2412 is provided on the connecting pipe 241, and the connection with the nitrogen interconnect pipe 14 is achieved through the flange 2412.

[0025] The fixing tube 242 is provided with a recessed part that is recessed towards the center of the fixing tube 242, and the clamping strip 244 is provided with a protrusion 2411 that is adapted to the recessed part. The protrusion 2411 protrudes towards the fixing tube 242. In this way, the recessed part and the protrusion 2411 cooperate to clamp the air nozzle and ensure that the air nozzle is not easy to fall off.

[0026] During operation, when pure water is consumed too quickly, the liquid level in pure water tank 1 drops, increasing the space for storing nitrogen. This leads to a decrease in nitrogen pressure within pure water tank 1. At this time, under the pressure of the gas spring 232, the gas in air bladder 21 is forced out and discharged through the nozzle into the nitrogen interconnect pipe 14, then flows back into pure water tank 1, ensuring sufficient nitrogen in pure water tank 1 without the need for additional nitrogen. When pure water is consumed too slowly, the liquid level in pure water tank 1 rises, reducing the space for storing nitrogen. This leads to an increase in nitrogen pressure within pure water tank 1. At this time, the nitrogen pressure in air bladder 21 is lower than the nitrogen pressure in pure water tank 1, causing the nitrogen in pure water tank 1 to move towards air bladder 21, allowing air bladder 21 to collect nitrogen without the need to discharge excess nitrogen. This solves the problem of significant waste caused by frequent replenishment and discharge of nitrogen due to liquid level fluctuations in traditional nitrogen-sealed water tanks, effectively reducing nitrogen consumption and lowering operating costs.

[0027] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A nitrogen sealing device with low nitrogen consumption, comprising a pure water tank, wherein an air inlet pipe and a water inlet pipe are respectively connected to the top of the pure water tank, and a water outlet pipe is provided at the bottom of the pure water tank, characterized in that: The top of the pure water tank is also provided with a nitrogen interconnection pipe. The end of the nitrogen interconnection pipe away from the pure water tank is connected to a gas storage device for storing nitrogen. The gas storage device includes a gas bag for storing nitrogen, a container for placing the gas bag, and a pressure mechanism. The pressure mechanism is used to apply pressure to the gas bag. The gas bag has an air inlet. The container is provided with a fixing mechanism for connecting the air inlet to the nitrogen interconnection pipe.

2. The nitrogen sealing device with low nitrogen consumption as described in claim 1, characterized in that: The fixing mechanism includes a connecting pipe and a fixing pipe for mutually clamping the air inlet nozzle, and a clamp for tightening the connecting pipe. The fixing pipe is installed on the receiving tank and communicates with the inside of the receiving tank. The air inlet nozzle is located inside the fixing pipe, and the front end of the air inlet nozzle is turned outward and wrapped around the fixing pipe. The connecting pipe is used to connect to the nitrogen interconnection pipe. The connecting pipe is provided with a clamping strip, which presses on the outward part of the air inlet nozzle. The clamp is located on the clamping strip.

3. The nitrogen sealing device with low nitrogen consumption as described in claim 2, characterized in that: The fixing tube is provided with a recessed part that is recessed towards the center of the fixing tube, and the clamping strip is provided with a protrusion that matches the recessed part, the protrusion protruding towards the fixing tube.

4. The nitrogen sealing device with low nitrogen consumption as described in claim 2, characterized in that: The connecting pipe is equipped with a flange for connecting to the nitrogen interconnect pipe.

5. A nitrogen sealing device with low nitrogen consumption as described in claim 2, characterized in that: The fixing pipe is installed at the bottom of the container.

6. The nitrogen sealing device with low nitrogen consumption as described in claim 1, characterized in that: The pressure mechanism includes a pressure plate for pressing on the airbag, a gas spring for applying pressure to the pressure plate, and a mounting bracket for mounting the gas spring. The mounting bracket is mounted on the container, and the lower end of the gas spring is connected to the pressure plate.

7. The nitrogen sealing device with low nitrogen consumption as described in claim 1, characterized in that: The air intake pipe is also equipped with an electromagnetic flow meter for measuring the nitrogen flow rate.

8. The nitrogen sealing device with low nitrogen consumption as described in claim 1, characterized in that: The pure water tank is equipped with a level sensor for detecting the pure water level.

9. The nitrogen sealing device with low nitrogen consumption as described in claim 1, characterized in that: The inlet pipe is equipped with a first flow sensor for detecting the flow rate of the inlet pipe, and the outlet pipe is equipped with a second flow sensor for detecting the flow rate of the outlet pipe.

10. A nitrogen sealing device with low nitrogen consumption as described in claim 1, characterized in that: The top of the pure water tank is also equipped with a pressure relief valve for releasing pressure and a pressure sensor for detecting nitrogen pressure.

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