A device for switching between circulating water and chilled water for NMP purification

Abstract

This utility model discloses a circulating water / chilled water switching device for NMP purification, comprising a water storage tank and a connecting pipe. The connecting pipe is installed at the top of the water storage tank, and a filter block is installed inside the connecting pipe. Multiple sets of L-shaped grooves with equal spacing are arranged on the inner wall of the connecting pipe. Multiple sets of limiting blocks with equal spacing are arranged on the outer wall of the filter block, and the limiting blocks are slidably connected to the L-shaped grooves. A drive seat is installed on one side of the outer wall of the water storage tank, and a stepper motor is installed on the side wall of the drive seat. A worm gear is installed at the output end of the stepper motor and is movably connected to the drive seat. A stirring frame is movably installed inside the drive seat on one side of the worm gear, and a worm wheel is provided on the surface of the stirring frame. This utility model not only achieves filtration of impurities in the circulating water and neutralization of acidic and alkaline substances, facilitating flexible switching between two different water sources, but also improves the convenience of switching water supply.

Description

Technical Field

[0001] This utility model relates to the technical field of water supply switching devices, specifically a device for switching circulating water and chilled water for NMP purification. Background Technology

[0002] N-Methylpyrrolidone (NMP) is a commonly used solvent in laboratories and is frequently used in nanofabrication processes (such as resist stripping). It serves as a high-boiling-point polar solvent, primarily used in resist stripping processes in semiconductor manufacturing. It is also used in nanotechnology as a dispersion medium for materials such as carbon nanotubes and graphene, and participates in the preparation of lithium-ion battery electrode materials. In the production process, the chilled water system is crucial for maintaining stable NMP reaction temperatures and ensuring precise product separation. However, the energy consumption of chilled water production units is extremely high. Therefore, it is essential to develop a rapid switching and maintenance technology to enable quick switching between the chilled water system and the circulating water system in different seasons, thereby reducing energy consumption.

[0003] For example, the switching device for a water supply system disclosed in the authorization announcement number CN219364791U includes a filter water tank and a direct supply water tank. The upper end of the filter water tank is fixedly connected to an inlet pipe, the upper end of the inside of the inlet pipe is fixedly connected to a shielding end plate, and the upper end of the inside of the inlet pipe is fixedly connected to an mounting bracket.

[0004] Although it achieves the setting of rotating fan blades and cleaning brushes, when in use, the impact force of the water flow causes the rotating fan blades to rotate, which in turn drives the connecting rod to rotate. In this way, the cleaning brush rotates and washes the upper part of the filter block. Thus, while the filter block is filtering, the cleaning brush removes impurities, thereby preventing the filter block from clogging. The impurities are stored in the collection box. In this way, a large water flow can still be maintained even after long-term use, making it difficult for the filter block to be clogged and convenient to use.

[0005] However, this does not solve the problem that the existing water supply switching device is not conducive to filtering impurities in the circulating water and neutralizing acidic and alkaline substances, nor is it conducive to flexibly switching between two different water sources, thus affecting the convenience of switching water supply. Utility Model Content

[0006] The purpose of this invention is to provide a circulating water and chilled water switching device for NMP purification, in order to solve the problem in the background art that the water supply switching device is not convenient for filtering impurities in the circulating water and neutralizing acid and alkali substances, which is not conducive to flexibly switching water supply between two different water sources and affects the convenience of switching water supply.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a circulating water / chilled water switching device for NMP purification, comprising a water storage tank and a connecting pipe. The connecting pipe is installed at the top of the water storage tank. A filter block is installed inside the connecting pipe. Multiple sets of L-shaped grooves with equal spacing are provided on the inner wall of the connecting pipe. Multiple sets of limiting blocks with equal spacing are provided on the outer wall of the filter block, and the limiting blocks are slidably connected to the L-shaped grooves. A drive seat is provided on one side of the outer wall of the water storage tank. A stepper motor is provided on the side wall of the drive seat. A worm gear is provided at the output end of the stepper motor, and the worm gear is movably connected to the drive seat. A stirring frame is movably installed inside the drive seat on one side of the worm gear. A worm wheel is provided on the surface of the stirring frame, and the worm gear and the worm wheel mesh with each other. An adapter sleeve is provided on the outer wall of the drive seat, and the stirring frame extends into the interior of the adapter sleeve and is movably connected to the adapter sleeve. A circulating water inlet pipe is provided on the other side of the water storage tank. A diversion frame is installed at the end of the circulating water inlet pipe away from the water storage tank.

[0008] Preferably, a placement frame is provided at the top of the diversion frame, and a cylinder is movably mounted at the top of the placement frame.

[0009] Preferably, a push arm is installed at the output end of the cylinder, and a crank arm is provided at the end of the push arm away from the cylinder.

[0010] Preferably, the crank arm is provided with a hinge shaft at one end near the push arm, and the crank arm is movably connected to the push arm through the hinge shaft.

[0011] Preferably, a movable shaft is fixedly installed at the end of the crank arm away from the push arm, a valve body is provided inside the diversion frame, and the movable shaft extends into the interior of the diversion frame and is connected to the valve body.

[0012] Preferably, a liquid outlet pipe is provided on one side wall of the diversion frame, and a chilled water inlet pipe is provided on the other side wall of the diversion frame.

[0013] Preferably, the valve body has a first channel inside, and the liquid outlet pipe is connected to the circulating water inlet pipe through the first channel.

[0014] Preferably, a second channel is provided inside the valve body on one side of the first channel, and the liquid outlet pipe is connected to the chilled water inlet pipe through the second channel.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the water supply switching device not only filters impurities in the circulating water and neutralizes acidic and alkaline substances, facilitating flexible switching of water supply between two different water sources, but also improves the convenience of switching water supply.

[0016] (1) Connect the chilled water inlet pipe to the chilled water pipeline, and connect the connecting pipe to the circulating water pipeline. After circulating water completes one cycle, it returns to the inside of the storage tank through the connecting pipe. During use, the circulating water will be mixed with impurities. When the circulating water passes through the connecting pipe, it will be filtered by the filter block to filter and intercept the impurities. When the filter block needs to be replaced after long-term use, first disconnect the circulating water pipeline, then rotate the filter block counterclockwise. The filter block will drive the limiting block to slide inside the L-shaped groove. When the limiting block moves to the turning position of the L-shaped groove, pull the filter block upward to remove it from the inside of the connecting pipe. Then replace it with a new filter block and install it inside the connecting pipe. The filtered circulating water enters the storage tank for storage. In order to ensure that the pH of the circulating water is moderate, connect the acid-base neutralization liquid pipeline. Connected to the adapter sleeve, the acid-base neutralization solution is transported through the adapter sleeve to the inside of the stirring frame and then through the holes on the surface of the stirring frame to the water storage tank. The neutralization solution neutralizes the acid and base substances in the circulating water, maintaining its pH within a suitable range. To ensure more thorough neutralization, a stepper motor drives a worm gear to rotate, which in turn drives a worm wheel, which in turn drives the stirring frame. The adapter sleeve provides movable support for the stirring frame, which in turn stirs the circulating water, ensuring more thorough contact between the neutralization solution and the circulating water. This achieves more complete neutralization of the acid and base substances in the circulating water, filtering impurities and neutralizing acid and base substances. It also facilitates quick disassembly and replacement of the filter block and ensures more thorough contact between the neutralization solution and the circulating water.

[0017] (2) Currently, chilled water is fed into the equipment through the chilled water inlet pipe-second channel-outlet pipe. When it is necessary to switch to circulating water, the cylinder drives the push arm to move, the push arm drives the crank arm to rotate through the hinge shaft, the crank arm drives the movable shaft to rotate, the movable shaft drives the valve body to rotate, the valve body blocks the chilled water inlet pipe, and the chilled water source is blocked. At the same time, the first channel is rotated to the connection position of the outlet pipe and the circulating water inlet pipe, so that the outlet pipe is connected to the circulating water inlet pipe. The circulating water that has been neutralized by acid and alkali is transported into the equipment through the circulating water inlet pipe-first channel-outlet pipe to complete the switching of circulating water and chilled water. This realizes the rapid switching of water supply mode, facilitates the flexible switching of water supply between two different water sources, and improves the convenience of switching water supply. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 3 This is a side sectional view of the drive seat of this utility model.

[0021] Figure 4 This is a three-dimensional perspective structural diagram of the water storage tank of this utility model;

[0022] Figure 5 This is a bottom view sectional structural diagram of the diversion frame of this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the filter block and connecting pipe of this utility model.

[0024] In the diagram: 1. Water storage tank; 2. Drive base; 3. Connecting pipe; 4. Diverter frame; 5. Circulating water inlet pipe; 6. Outlet pipe; 7. Chilled water inlet pipe; 8. L-shaped trough; 9. Placement rack; 10. Cylinder; 11. Push arm; 12. Hinge shaft; 13. Crank arm; 14. Movable shaft; 15. Worm gear; 16. Worm wheel; 17. Stepper motor; 18. Stirring rack; 19. Adapter sleeve; 20. Valve body; 21. First channel; 22. Second channel; 23. Filter block; 24. Limit block. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Example 1

[0029] Please see Figure 1-6 This utility model provides an embodiment of a circulating water / chilled water switching device for NMP purification, comprising a water storage tank 1 and a connecting pipe 3. The connecting pipe 3 is installed at the top of the water storage tank 1, and a filter block 23 is disposed inside the connecting pipe 3. Multiple sets of L-shaped grooves 8 at equal intervals are disposed on the inner wall of the connecting pipe 3. Multiple sets of limiting blocks 24 at equal intervals are disposed on the outer wall of the filter block 23, and the limiting blocks 24 are slidably connected to the L-shaped grooves 8. A drive seat 2 is disposed on one side of the outer wall of the water storage tank 1, and a stepper motor 17 is disposed on the side wall of the drive seat 2, the stepper motor 17 providing power. The stepper motor 17 has a worm gear 15 at its output end, which is movably connected to the drive seat 2. A stirring frame 18 is movably installed inside the drive seat 2 on one side of the worm gear 15. A worm wheel 16 is provided on the surface of the stirring frame 18, and the worm gear 15 and the worm wheel 16 mesh with each other. A transition sleeve 19 is provided on the outer wall of the drive seat 2, and the stirring frame 18 extends into the interior of the transition sleeve 19 and is movably connected to the transition sleeve 19. A circulating water inlet pipe 5 is provided on the side wall of the other side of the water storage tank 1. A diversion frame 4 is installed at the end of the circulating water inlet pipe 5 away from the water storage tank 1.

[0030] Connect the chilled water inlet pipe 7 to the chilled water pipeline, and connect the connecting pipe 3 to the circulating water pipeline. After circulating once, the circulating water returns to the storage tank 1 through the connecting pipe 3. During use, the circulating water may contain impurities. When the circulating water passes through the connecting pipe 3, it will be filtered by the filter block 23 to filter and intercept the impurities. When the filter block 23 needs to be replaced after long-term use, first disconnect the circulating water pipeline, then rotate the filter block 23 counterclockwise. The filter block 23 will drive the limiting block 24 to slide inside the L-shaped groove 8. When the limiting block 24 moves to the turning position of the L-shaped groove 8, pull the filter block 23 upward to remove it from the connecting pipe 3. Then replace it with a new filter block 23 and install it inside the connecting pipe 3. The filtered circulating water enters the storage tank 1 for storage. To ensure that the pH of the circulating water is moderate, connect the acid-base neutralization solution pipeline to the adapter sleeve 19. The liquid is conveyed through the adapter sleeve 19 to the inside of the stirring frame 18 and then through the holes on the surface of the stirring frame 18 to the water storage tank 1. The neutralizing liquid neutralizes the acid and alkaline substances in the circulating water, keeping its pH within a suitable range. To make the neutralization of the acid and alkaline substances in the circulating water more complete, the stepper motor 17 is turned on, which drives the worm gear 15 to rotate. Under the mutual meshing of the worm gear 15 and the worm wheel 16, the worm gear 15 drives the worm wheel 16 to rotate, which in turn drives the stirring frame 18 to rotate. The adapter sleeve 19 provides movable support for the stirring frame 18, and the stirring frame 18 stirs the circulating water, making the neutralizing liquid come into more complete contact with the circulating water, thereby making the acid and alkaline substances in the circulating water more complete. This achieves the filtration of impurities in the circulating water and the neutralization of acid and alkaline substances, facilitating the quick disassembly and replacement of the filter block and the stirring of the circulating water to make the neutralizing liquid come into more complete contact with it.

[0031] The top of the diversion frame 4 is provided with a placement rack 9, and a cylinder 10 is movably installed on the top of the placement rack 9. The cylinder 10 plays the role of power drive.

[0032] A push arm 11 is installed at the output end of the cylinder 10, and a crank arm 13 is provided at the end of the push arm 11 away from the cylinder 10.

[0033] A hinge shaft 12 is provided at one end of the crank arm 13 near the push arm 11, and the crank arm 13 is movably connected to the push arm 11 through the hinge shaft 12. A movable shaft 14 is fixedly installed at the other end of the crank arm 13 away from the push arm 11. A valve body 20 is provided inside the diversion frame 4, and the movable shaft 14 extends into the inside of the diversion frame 4 and is connected to the valve body 20.

[0034] A liquid outlet pipe 6 is provided on one side wall of the diversion frame 4, and a chilled water inlet pipe 7 is provided on the other side wall of the diversion frame 4. A first channel 21 is provided inside the valve body 20, and the liquid outlet pipe 6 is connected to the circulating water inlet pipe 5 through the first channel 21.

[0035] The valve body 20 on one side of the first channel 21 is provided with a second channel 22, and the liquid outlet pipe 6 is connected to the chilled water inlet pipe 7 through the second channel 22.

[0036] Currently, chilled water is fed into the equipment via chilled water inlet pipe 7, second channel 22, and outlet pipe 6. When switching to circulating water is required, cylinder 10 is opened, which drives push arm 11 to move. Push arm 11 drives crank arm 13 to rotate via hinge shaft 12. Crank arm 13 drives movable shaft 14 to rotate, which in turn drives valve body 20 to rotate. Valve body 20 blocks chilled water inlet pipe 7, thus blocking the chilled water source. At the same time, first channel 21 is rotated to the connection position between outlet pipe 6 and circulating water inlet pipe 5, connecting outlet pipe 6 with circulating water inlet pipe 5. Circulating water that has undergone acid-base neutralization is then transported into the equipment via circulating water inlet pipe 5, first channel 21, and outlet pipe 6, completing the switching between circulating water and chilled water. This enables rapid switching of water supply methods, facilitating flexible switching between two different water sources and improving the convenience of water supply switching.

[0037] Work steps

[0038] Connect the chilled water inlet pipe 7 to the chilled water pipeline, and connect the connecting pipe 3 to the circulating water pipeline. After circulating once, the circulating water returns to the water storage tank 1 through the connecting pipe 3. During use, the circulating water may contain impurities. When the circulating water passes through the connecting pipe 3, it will be filtered by the filter block 23 to filter and intercept the impurities. When the filter block 23 needs to be replaced after long-term use, first disconnect the circulating water pipeline, then rotate the filter block 23 counterclockwise. The filter block 23 will drive the limiting block 24 to slide inside the L-shaped groove 8. When the limiting block 24 moves to the turning position of the L-shaped groove 8, pull the filter block 23 upward to remove the filter block 23 from the connecting pipe 3. After the filter block 23 is removed, it is replaced and installed inside the connecting pipe 3. The filtered circulating water enters the storage tank 1 for storage. To ensure that the pH of the circulating water is appropriate, the acid-base neutralization liquid pipeline is connected to the adapter sleeve 19. The acid-base neutralization liquid is transported through the adapter sleeve 19 to the inside of the stirring rack 18 and then through the holes on the surface of the stirring rack 18 to the storage tank 1. The neutralization liquid neutralizes the acid and alkaline substances in the circulating water, keeping its pH within a suitable range. To make the neutralization of the acid and alkaline substances in the circulating water more complete, the stepper motor 17 drives the worm gear 15 to rotate, the worm gear 15 drives the worm wheel 16 to rotate, and the worm wheel 16 drives the stirring rack 18 to rotate. The adapter sleeve 19 provides movable support for the stirring frame 18, which in turn stirs the circulating water, ensuring more thorough contact between the neutralizing liquid and the circulating water, thereby more effectively neutralizing the acidic and alkaline substances in the circulating water. Currently, the chilled water flows through the chilled water inlet pipe 7, the second channel 22, and the outlet pipe 6 into the equipment. When switching to circulating water is required, the cylinder 10 drives the push arm 11 to move. The push arm 11, through the hinge shaft 12, drives the crank arm 13 to rotate, which in turn drives the movable shaft 14 to rotate. The movable shaft 14 then drives the valve body 20 to rotate, blocking the chilled water inlet pipe 7 and sealing the chilled water source. Simultaneously, the first channel 21... Rotate the device to the connection point between the outlet pipe 6 and the circulating water inlet pipe 5 to connect the outlet pipe 6 and the circulating water inlet pipe 5. The circulating water, after acid-base neutralization, is transported into the equipment through the circulating water inlet pipe 5-first channel 21-outlet pipe 6 to complete the switching between circulating water and chilled water. At the same time, this device can use an IoT-based remote monitoring and maintenance system to collect the equipment's operating parameters (such as vibration, temperature, pressure, etc.) in real time using sensors, transmit them to a cloud server via a wireless network, and use big data analysis and fault prediction models to provide early warnings of equipment failures, thereby achieving preventive maintenance, improving equipment reliability, and extending service life.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circulating water and chilled water switching device for NMP purification, comprising a water storage tank and a connecting pipe, characterized in that: A connecting pipe is installed at the top of the water storage tank. A filter block is installed inside the connecting pipe. Multiple sets of L-shaped grooves with equal spacing are provided on the inner wall of the connecting pipe. Multiple sets of limiting blocks with equal spacing are provided on the outer wall of the filter block, and the limiting blocks are slidably connected to the L-shaped grooves. A drive seat is provided on one side of the outer wall of the water storage tank. A stepper motor is provided on the side wall of the drive seat. A worm gear is provided at the output end of the stepper motor and is movably connected to the drive seat. A stirring frame is movably installed inside the drive seat on one side of the worm gear. A worm wheel is provided on the surface of the stirring frame, and the worm gear and the worm wheel mesh with each other. An adapter sleeve is provided on the outer wall of the drive seat, and the stirring frame extends into the interior of the adapter sleeve and is movably connected to the adapter sleeve. A circulating water inlet pipe is provided on the other side of the water storage tank. A diversion frame is installed at the end of the circulating water inlet pipe away from the water storage tank.

2. The switching device for NMP purification circulating water and refrigerating water according to claim 1, characterized in that: The top of the diversion frame is provided with a placement frame, and a cylinder is movably mounted on the top of the placement frame.

3. The NMP purification circulating water and chilled water switching device according to claim 2, characterized in that: A push arm is installed at the output end of the cylinder, and a crank arm is provided at the end of the push arm away from the cylinder.

4. The circulating water and chilled water switching device for NMP purification according to claim 3, characterized in that: The crank arm is provided with a hinge shaft at one end near the push arm, and the crank arm is movably connected to the push arm through the hinge shaft.

5. The circulating water and chilled water switching device for NMP purification according to claim 3, characterized in that: A movable shaft is fixedly installed at the end of the crank arm away from the push arm. A valve body is provided inside the diversion frame, and the movable shaft extends into the interior of the diversion frame and is connected to the valve body.

6. The circulating water and chilled water switching device for NMP purification according to claim 1, characterized in that: A liquid outlet pipe is provided on one side wall of the diversion frame, and a chilled water inlet pipe is provided on the other side wall of the diversion frame.

7. The circulating water and chilled water switching device for NMP purification according to claim 5, characterized in that: The valve body has a first channel inside, and the liquid outlet pipe is connected to the circulating water inlet pipe through the first channel.

8. The circulating water and chilled water switching device for NMP purification according to claim 7, characterized in that: A second channel is provided inside the valve body on one side of the first channel, and the liquid outlet pipe is connected to the chilled water inlet pipe through the second channel.

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