Automatic liquid preparation cleaning device

Abstract

The utility model relates to the technical field of liquid preparation equipment, and discloses an automatic liquid preparation cleaning device, which comprises a liquid preparation unit, a cleaning unit and a control unit, the powder conveying unit comprises a powder tank for containing powder materials; the weighing unit comprises a weighing tank communicated with the powder conveying unit and an electronic scale for weighing the weighing tank; the stirring unit comprises a stirring barrel and is communicated with the tail end of the liquid preparation tank and the tail end of the weighing tank at the same time, and stirring blades suitable for stirring solvent materials and powder materials are arranged in the stirring unit. According to the automatic liquid preparing and cleaning device, the liquid preparing unit, the powder conveying unit, the weighing unit and the stirring unit are integrated, the whole liquid preparing process is completed in an automatic control mode, it is guaranteed that needed materials are accurate and controllable, and the situation that due to manual operation, weighing data deviation is large or personnel operation errors are caused is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid dispensing equipment, in particular to an automatic liquid dispensing and cleaning device. Background Art

[0002] Perovskite solar cells have the characteristics of high efficiency and low cost. With the continuous progress in device structure, perovskite structure, charge transfer layer, etc., the photovoltaic efficiency of perovskite solar cells has been greatly improved, and it has also shown great potential.

[0003] The main production method of perovskite light absorption layer is slit coating, and its working principle is to mix the perovskite precursor in a certain proportion, extrude it evenly through the slit, and apply it to the glass surface. After high-temperature annealing, the perovskite light absorption layer is formed. The perovskite solution is prepared by pouring a certain mass or volume of precursor powder and organic solvent into a stirring kettle, stirring for a certain period of time, filtering and transferring it to the liquid supply barrel of the coating machine.

[0004] However, in the related technology, although the preparation of perovskite solution can meet the production needs, the preparation process is mostly manual operation, with low automation and low weighing efficiency, and it is easy to cause large deviations in weighing data or human operation errors. In addition, during the manual weighing process, the volatilization of organic solvents and the dust generated by the pouring of powder materials can be easily inhaled by operators and cause certain effects on the body. Utility Model Content

[0005] In view of this, the utility model provides an automatic liquid preparation and cleaning device to solve the problem of low automation in the preparation process of perovskite solution.

[0006] The utility model provides an automatic liquid preparation and cleaning device, comprising:

[0007] A liquid dispensing unit, comprising at least one liquid dispensing tank suitable for containing solvent material, and a metering module suitable for counting the mass or flow rate of the solvent material discharged from the liquid dispensing tank;

[0008] A powder delivery unit, comprising at least one powder tank suitable for containing powder material;

[0009] A weighing unit, comprising a weighing tank connected to the powder conveying unit, and a scale for weighing the weighing tank;

[0010] The stirring unit comprises a stirring barrel, which is connected with the discharge end of the liquid preparation tank and the discharge end of the weighing tank. The stirring unit is provided with stirring blades suitable for stirring the solvent material and the powder material.

[0011] Beneficial effect: The automatic liquid preparation and cleaning device provided by the embodiment of the utility model integrates the liquid preparation unit, the powder conveying unit, the weighing unit and the stirring unit, and completes the entire liquid preparation process in an automatic control manner. It is convenient to automatically control the discharge quality or flow rate of the solvent material during the liquid preparation process, and automatically control the quality of the powder material, so as to ensure the accurate control of the required materials, avoid the situation where the weighing data deviation or human operation error caused by manual operation occurs; and after the weighing is completed, it is sent to the stirring unit for automatic stirring, so as to complete the stirring and mixing of the solvent material and the powder material; the realization of automatic liquid preparation reduces the safety hazard of chemical leakage, reduces the human harm caused by manual operation, avoids human error, and reduces production waste.

[0012] In an optional embodiment, the automatic liquid dispensing and cleaning device further comprises: a cleaning tank, wherein the cleaning tank is suitable for containing a cleaning solvent;

[0013] The cleaning nozzle is arranged in the mixing barrel and is connected with the cleaning tank so as to rinse the mixing barrel.

[0014] Beneficial effect: The cleaning solvent is sprayed everywhere in the mixing barrel through the cleaning nozzle, and further combined with the stirring of the stirring blade, the mixing barrel can be automatically cleaned. This can avoid the problem of chemical leakage during the cleaning process and avoid safety hazards.

[0015] In an optional embodiment, the liquid dispensing tank is connected to a first air intake pipe, and the first air intake pipe is provided with a first air intake valve; the liquid dispensing tank is also connected to a first exhaust pipe, and the first exhaust pipe is provided with a first exhaust valve;

[0016] And / or, the powder tank is connected to a second air inlet pipe, and the second air inlet pipe is provided with a second air inlet valve; the powder tank is also connected to a second exhaust pipe, and the second exhaust pipe is provided with a second exhaust valve.

[0017] In an optional embodiment, the first air inlet pipe is suitable for introducing an inert gas, and after the air in the liquid preparation tank is exhausted through the first exhaust pipe, the first exhaust valve is closed;

[0018] and / or, the second air inlet pipe is adapted to introduce an inert gas, and after the air in the powder tank is exhausted through the second exhaust pipe, the second exhaust valve is closed;

[0019] And / or, the mixing barrel is connected to a third exhaust pipe, and the third exhaust pipe is provided with a third exhaust valve.

[0020] Beneficial effects: By filling the tank with inert gas, the inert gas can exhaust the air in the tank, protecting the material from contact with the air and avoiding the absorption of oxygen and moisture in the air and deterioration; by connecting the mixing barrel with a third exhaust pipe, the gas in the mixing barrel can be easily discharged when the solvent material and the powder material are introduced into the mixing barrel, ensuring the normal pressure in the mixing barrel and avoiding affecting the falling of the material. And when the solution after mixing is output from the solution delivery pipe, it is convenient to allow air to enter the mixing barrel to ensure the pressure balance in the mixing barrel.

[0021] In an optional embodiment, the powder tank is connected to the weighing tank via a material conveying pipe, and at least a portion of the material conveying pipe includes a flexible pipe made of a flexible material;

[0022] And / or, a vibrating conveyor is installed outside the material conveying pipe to vibrate the material conveying pipe; the weighing tank is provided with a discharge pipe, the discharge pipe is provided with a discharge valve, and a vibrator is installed outside the discharge pipe;

[0023] And / or, a feed pipe is formed in the mixing barrel corresponding to the discharge pipe, the discharge pipe is nested and connected with the feed pipe, and the feed pipe is provided with a feed valve.

[0024] Beneficial effect: By making at least a part of the material conveying pipe made of soft material, when the vibration conveyor vibrates the material conveying pipe, the transmission of vibration to the powder tank is reduced, thereby preventing the vibration from causing damage to the powder tank.

[0025] In an optional embodiment, a solution delivery pipe is connected to the bottom of the stirring barrel, and the solution delivery pipe is provided with a solution discharge valve; the solution delivery pipe is also provided with a solution pump suitable for pumping the solution, and the solution delivery pipe is also provided with a filter.

[0026] Beneficial effect: The mixed solution can be transported to the rear end by means of a solution pump.

[0027] In an optional embodiment, the solution delivery pipe is further provided with a solution delivery valve downstream of the solution pump, and the solution delivery pipe is further connected to a cleaning reflux pipe between the solution delivery valve and the solution pump, and the other end of the cleaning reflux pipe is connected to the stirring barrel.

[0028] Beneficial effect: By connecting a cleaning reflux pipe between the solution delivery valve and the solution pump, it is convenient to close the solution delivery valve and open the reflux valve in the cleaning mode, so that the cleaning solvent can flow back into the stirring barrel through the cleaning reflux pipe to complete the circulation cleaning, reduce the waste of cleaning solvent, and ensure that the solution delivery pipe is clean.

[0029] In an optional embodiment, the cleaning reflux pipe is provided with a reflux valve, and the cleaning reflux pipe is located upstream of the reflux valve and is also connected to a waste liquid delivery pipe, and the waste liquid delivery pipe is provided with a waste liquid valve.

[0030] Beneficial effect: by locating the cleaning reflux pipe upstream of the reflux valve and connecting it to the waste liquid delivery pipe, after cleaning is completed, the reflux valve is closed and the waste liquid valve is opened, so that the waste liquid after cleaning is discharged from the waste liquid delivery pipe.

[0031] In an optional embodiment, the liquid preparation tank is further provided with a first pressure gauge to monitor the pressure inside the liquid preparation tank through the first pressure gauge; and / or the powder tank is further provided with a second pressure gauge to monitor the pressure inside the powder tank through the second pressure gauge;

[0032] The liquid preparation tank is provided with a cover plate, and the cover plate is locked with the liquid preparation tank by a first clamp; and / or, the powder tank is provided with a cover plate, and the cover plate is locked with the powder tank by a second clamp; and / or, the weighing tank is provided with a cover plate, and the cover plate is locked with the weighing tank by a third clamp; and / or, the mixing barrel is provided with a cover plate, and the cover plate is locked with the mixing barrel by a fourth clamp;

[0033] A first viewing window is also provided on the top or side wall of the liquid preparation tank; and / or a second viewing window is also provided on the top or side wall of the powder tank;

[0034] The discharging end of each liquid dispensing tank is provided with a solvent delivery pipe, and the solvent delivery pipe is provided with a solvent delivery valve;

[0035] The powder tank is connected to the weighing tank via a material conveying pipe, and the material conveying pipe is provided with a material conveying valve;

[0036] The stirring blade is located outside the stirring barrel and a stirring motor is also provided, and the stirring motor is connected to the stirring blade;

[0037] The cleaning tank is connected to the stirring barrel through a separate cleaning solvent feed port.

[0038] In an optional embodiment, the liquid preparation unit includes three liquid preparation tanks, and the powder delivery unit includes four powder tanks.

[0039] In an optional embodiment, the three liquid preparation tanks are respectively suitable for containing: N,N-dimethylformamide solvent (DMF), N-methylpyrrolidone solvent (NMP), acetonitrile solvent (ACN);

[0040] The four powder cans are suitable for containing: powdered methylamine iodide (FAI), powdered lead iodide (PbI 2 ), powdered cesium iodide (CsI), powdered methylamine chloride (MACl).

[0041] In an optional embodiment, it further includes: a control module, the control module is electrically connected to the metering module, the control module is electrically connected to the scale, and the control module is directly or indirectly electrically connected to the valves of each pipeline.

[0042] Beneficial effects: Automatic and accurate weighing of solvent materials and powder materials is achieved, and the quality of powder materials is automatically controlled, thereby ensuring accurate control of required materials and accurately controlling the mixing time of solvent materials and powder materials in the mixing barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a schematic diagram of the automatic liquid dispensing and cleaning device of the utility model.

[0045] Description of reference numerals:

[0046] 1. Liquid dispensing unit; 10. Liquid dispensing tank; 101. First air inlet pipe; 102. First air inlet valve; 103. First pressure gauge; 104. First clamp; 105. First window; 106. First exhaust pipe; 107. First exhaust valve; 108. Liquid flow meter; 109. Solvent delivery valve; 110. Solvent delivery pipe;

[0047] 2. Powder conveying unit; 20. Powder tank; 201. Second air inlet pipe; 202. Second air inlet valve; 203. Second pressure gauge; 204. Second clamp; 205. Second exhaust pipe; 206. Second exhaust valve; 207. Second viewing window; 208. Flexible pipe; 209. Vibrating conveyor; 210. Material conveying valve; 211 Material conveying pipe;

[0048] 3. Weighing unit; 301. Scale; 302. Third clamp; 303. Weighing tank; 304. Discharge valve; 305. Discharge pipe; 306. Vibrator;

[0049] 4. Stirring unit; 40. Cleaning tank; 401. Stirring motor; 402. Cleaning solvent feed port; 403. Third exhaust valve; 404. Third exhaust pipe; 405. Cleaning nozzle; 406. Stirring barrel; 407. Stirring blade; 408. Feed pipe; 409. Feed valve; 410. Fourth clamp; 411. Solution discharge valve; 412. Cleaning reflux pipe; 413. Reflux valve; 414. Waste liquid valve; 415. Waste liquid delivery pipe; 416. Solution pump; 417. Solution delivery valve; 418. Filter; 419. Solution delivery pipe. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] Combine the following Figure 1 , describing an embodiment of the utility model.

[0055] According to an embodiment of the utility model, there is provided an automatic liquid preparation and cleaning device, comprising:

[0056] The liquid dispensing unit 1 comprises at least one liquid dispensing tank 10 suitable for containing solvent material, and a metering module suitable for counting the mass or flow rate of the solvent material discharged from the liquid dispensing tank 10;

[0057] The powder delivery unit 2 comprises at least one powder tank 20 suitable for containing powder material;

[0058] The weighing unit 3 includes a weighing tank 303 connected to the powder conveying unit 2, and a scale 301 for weighing the weighing tank 303;

[0059] The stirring unit 4 includes a stirring barrel 406 , which is connected to the discharge end of the liquid preparation tank 10 and the discharge end of the weighing tank 303 . A stirring blade 407 suitable for stirring the solvent material and the powder material is arranged in the stirring unit 4 .

[0060] The automatic liquid preparation and cleaning device provided by the embodiment of the utility model integrates the liquid preparation unit 1, the powder conveying unit 2, the weighing unit 3 and the stirring unit 4, and completes the entire liquid preparation process in an automatic control manner. It is convenient to automatically control the discharge quality or flow rate of the solvent material and the quality of the powder material during the liquid preparation process, so as to ensure the accurate control of the required materials and avoid the situation where the weighing data deviation or human operation error caused by manual operation occurs; and after the weighing is completed, it is sent to the stirring unit 4 for automatic stirring, so as to complete the stirring and mixing of the solvent material and the powder material; the realization of automatic liquid preparation reduces the safety hazard of chemical leakage, reduces the human body harm caused by manual operation, avoids human error, and reduces production waste.

[0061] Optionally, the automatic liquid preparation and cleaning device of this embodiment further includes a control module, so as to realize automatic and accurate weighing of the solvent material and the powder material, and make the stirring time of the solvent material and the powder material in the stirring barrel 406 precisely controllable.

[0062] In this embodiment, the number of the liquid preparation tanks 10 can be three, such as Figure 1 The liquid preparation tank 10 shown includes three tank bodies A, B and C, and the three tank bodies have the same structure. The three tank bodies are suitable for containing the same or different types of solvent materials.

[0063] In this embodiment, the number of the powder tanks 20 may be four. Figure 1 The powder tank 20 shown includes four powder tanks K, L, M, and N. The four powder tanks have the same structure and are suitable for containing the same or different types of powder materials.

[0064] The scale 301 may specifically be an electronic scale.

[0065] In this embodiment, the liquid preparation unit 1 includes three liquid preparation tanks 10 , and the powder conveying unit 2 includes four powder tanks 20 .

[0066] The three liquid preparation tanks 10 are respectively suitable for containing: N, N-dimethylformamide solvent (DMF), N-methylpyrrolidone solvent (NMP), and acetonitrile solvent (ACN); wherein the concentration of N, N-dimethylformamide solvent (DMF) is ≥ 99.5%;

[0067] The four powder tanks 20 are respectively suitable for containing: powdered methylamine iodide (FAI), powdered lead iodide (PbI 2 ), powdered cesium iodide (CsI), and powdered methylamine chloride (MACl) to complete the preparation of the perovskite solution.

[0068] The discharging end of each liquid dispensing tank 10 is provided with a solvent delivery pipe 110, and the solvent delivery pipes 110 corresponding to the multiple liquid dispensing tanks 10 are merged into the same pipeline. The metering module is provided in the solvent delivery pipe 110, and the metering module may specifically include a liquid flow meter 108 or an electronic scale.

[0069] When the metering module is a liquid flow meter 108 , flow metering can be completed when the solvent material flows through the solvent delivery pipe 110 , and the mass can be calculated according to the density of the solvent material.

[0070] When the metering module is an electronic scale, the solvent delivery pipe 110 can be connected to a temporary storage tank, and the temporary storage tank is weighed by delivering the solvent material to the temporary storage tank to obtain the mass of the solvent material delivered to the stirring unit 4.

[0071] The solvent delivery pipe 110 is provided with a solvent delivery valve 109 .

[0072] In some embodiments, the automatic liquid dispensing cleaning device further comprises: a cleaning tank 40, wherein the cleaning tank 40 is suitable for containing a cleaning solvent;

[0073] The cleaning nozzle 405 is disposed in the stirring barrel 406 , and the cleaning nozzle 405 is connected to the cleaning tank 40 to rinse the stirring barrel 406 .

[0074] In this embodiment, the structure of the cleaning tank 40 can be the same as that of the liquid preparation tank 10, and the cleaning tank 40 is connected to the stirring barrel 406 through a separate cleaning solvent feed port 402. The cleaning solvent feed port 402 is provided with a flow meter and a valve.

[0075] In this embodiment, the cleaning solvent may specifically be N,N-dimethylformamide solvent (DMF), wherein the concentration of N,N-dimethylformamide solvent (DMF) is ≥99%.

[0076] The cleaning solvent is sprayed everywhere in the stirring barrel 406 by the cleaning nozzle 405, and further combined with the stirring of the stirring blade 407, the stirring barrel 406 can be automatically cleaned. In this way, the problem of chemical leakage that may occur during the cleaning process can be avoided, avoiding potential safety hazards.

[0077] The stirring blade 407 is located outside the stirring barrel 406 and a stirring motor 401 is also provided. The stirring motor 401 is connected to the stirring blade 407 to drive the stirring blade 407 to rotate.

[0078] In some embodiments, the liquid dispensing tank 10 is connected to a first air intake pipe 101, and the first air intake pipe 101 is provided with a first air intake valve 102; the liquid dispensing tank 10 is also connected to a first exhaust pipe 106, and the first exhaust pipe 106 is provided with a first exhaust valve 107;

[0079] And / or, the powder tank 20 is connected to a second air intake pipe 201 , and the second air intake pipe 201 is provided with a second air intake valve 202 ; the powder tank 20 is also connected to a second exhaust pipe 205 , and the second exhaust pipe 205 is provided with a second exhaust valve 206 .

[0080] In some embodiments, the first air inlet pipe 101 is suitable for introducing an inert gas, and after the air in the liquid preparation tank 10 is exhausted through the first exhaust pipe 106, the first exhaust valve 107 is closed;

[0081] And / or, the second air inlet pipe 201 is suitable for introducing an inert gas, and after the air in the powder tank 20 is exhausted through the second exhaust pipe 205, the second exhaust valve 206 is closed.

[0082] By filling the tank with inert gas, the inert gas can exhaust the air in the tank, protecting the material from contact with the air and avoiding absorption of oxygen and moisture in the air to deteriorate.

[0083] In this embodiment, the inert gas includes an inert gas, wherein the inert gas may specifically be nitrogen.

[0084] In order to ensure the air tightness of the liquid preparation tank 10, a cover plate is provided on the top of the liquid preparation tank 10, and the cover plate is locked on the top of the liquid preparation tank 10 by a first clamp 104 to maintain sealing.

[0085] A first viewing window 105 is also provided at the top or upper portion of the side wall of the liquid preparation tank 10 to facilitate observation of the internal conditions of the liquid preparation tank 10 .

[0086] The liquid preparation tank 10 is also provided with a first pressure gauge 103. After the inert gas is introduced into the liquid preparation tank 10, the pressure inside the liquid preparation tank 10 is monitored by the first pressure gauge 103. By maintaining a slight positive pressure, the solvent material in the liquid preparation tank 10 is facilitated to flow to the stirring barrel 406. In this embodiment, the pressures in the three liquid preparation tanks 10 A, B, and C are all maintained at 0.05 MPa.

[0087] Similarly, in order to ensure the airtightness of the powder tank 20, a cover plate is provided on the top of the powder tank 20, and the cover plate is locked on the top of the powder tank 20 by a second clamp 204 to maintain the seal.

[0088] A second viewing window 207 is also provided at the top or upper portion of the side wall of the powder tank 20 to facilitate observation of the interior of the powder tank 20 .

[0089] The powder tank 20 is also provided with a second pressure gauge 203. After the inert gas is introduced into the powder tank 20, the pressure inside the powder tank 20 is monitored by the second pressure gauge 203. By maintaining a slight positive pressure, the powder material in the powder tank 20 is conveniently transported to the weighing tank 303. In this embodiment, the pressures in the four powder tanks 20, K, L, M, and N, are all maintained at 10Pa.

[0090] In some embodiments, the stirring barrel 406 is connected to a third exhaust pipe 404 , and the third exhaust pipe 404 is provided with a third exhaust valve 403 .

[0091] By connecting the third exhaust pipe 404 to the stirring barrel 406, the gas in the stirring barrel 406 can be easily discharged when the solvent material and the powder material are introduced into the stirring barrel 406, so as to ensure that the pressure in the stirring barrel 406 is normal and avoid affecting the material discharge. When the mixed solution is output from the solution delivery pipe 419, air can be easily introduced into the stirring barrel 406 to ensure that the pressure in the stirring barrel 406 is balanced.

[0092] In order to ensure the air tightness of the mixing barrel 406, a cover plate is provided on the top of the mixing barrel 406, and the cover plate is locked on the top of the mixing barrel 406 by a fourth clamp 410 to maintain sealing.

[0093] In some embodiments, the powder tank 20 is connected to the weighing tank 303 via the material conveying pipe 211, and at least a portion of the material conveying pipe 211 includes a flexible pipe 208 made of a flexible material;

[0094] A vibration conveyor 209 is installed outside the material conveying pipe 211 to vibrate the material conveying pipe 211 .

[0095] The material conveying pipe 211 is provided with a material conveying valve 210 .

[0096] By making at least a portion of the material conveying pipe 211 made of a soft material, when the vibration conveyor 209 vibrates the material conveying pipe 211, the transmission of vibration to the powder tank 20 is reduced, thereby preventing the vibration from damaging the powder tank 20. The soft material may specifically include rubber. As a variation, at least a portion of the material conveying pipe 211 may be made of a soft material, or may be a pipe made of a structure such as a bellows, so as to reduce the transmission of vibration to the powder tank 20.

[0097] Specifically, in this embodiment, the delivery of the solvent material can be ensured to flow out smoothly by pressure, and the delivery of the powder material is ensured by the vibration conveyor 209 .

[0098] In some embodiments, the weighing tank 303 is provided with a discharge pipe 305, the discharge pipe 305 is provided with a discharge valve 304, and a vibrator 306 is installed outside the discharge pipe 305;

[0099] The mixing barrel 406 is formed with a feed pipe 408 corresponding to the discharge pipe 305 . The discharge pipe 305 and the feed pipe 408 are nested and connected. The feed pipe 408 is provided with a feed valve 409 .

[0100] In order to ensure the air tightness of the weighing tank 303, a cover plate is provided on the top of the weighing tank 303, and the cover plate is locked on the top of the weighing tank 303 by the third clamp 302 to maintain the seal.

[0101] In some embodiments, a solution delivery pipe 419 is connected to the bottom of the stirring barrel 406 , and the solution delivery pipe 419 is provided with a solution discharge valve 411 ; the solution delivery pipe 419 is also provided with a solution pump 416 suitable for pumping the solution.

[0102] The mixed solution can be pumped by the solution pump 416 to the rear end, for example, it can be transported to the coating equipment to complete the liquid supply.

[0103] The solution delivery pipe 419 is also provided with a filter 418 to filter the solution to remove insoluble substances and prevent large particles from flowing out.

[0104] In some embodiments, the solution delivery pipe 419 is located downstream of the solution pump 416 and is also provided with a solution delivery valve 417. The solution delivery pipe 419 is located between the solution delivery valve 417 and the solution pump 416 and is also connected to a cleaning reflux pipe 412. The other end of the cleaning reflux pipe 412 is connected to the stirring barrel 406.

[0105] By connecting the cleaning reflux pipe 412 between the solution delivery valve 417 and the solution pump 416, it is convenient to close the solution delivery valve 417 and open the reflux valve 413 in the cleaning mode, so that the cleaning solvent can flow back to the stirring barrel 406 through the cleaning reflux pipe 412 to complete the circulation cleaning, reduce the waste of cleaning solvent, and ensure that the solution delivery pipe 419 is clean.

[0106] Specifically, the other end of the cleaning return pipe 412 is connected to the upper part of the stirring barrel 406 so that the cleaning liquid can be used multiple times to achieve repeated flushing.

[0107] In some embodiments, the cleaning reflux pipe 412 is provided with a reflux valve 413 , and the cleaning reflux pipe 412 is also connected to a waste liquid delivery pipe 415 at an upstream position of the reflux valve 413 , and the waste liquid delivery pipe 415 is provided with a waste liquid valve 414 .

[0108] By locating the cleaning return pipe 412 upstream of the return valve 413 and connecting it to the waste liquid delivery pipe 415, after cleaning is completed, the return valve 413 is closed and the waste liquid valve 414 is opened to discharge the waste liquid after cleaning from the waste liquid delivery pipe 415.

[0109] By controlling the on and off of each valve and reasonably changing the delivery route of the cleaning solvent, automatic cleaning can be achieved.

[0110] In some embodiments, the automatic liquid preparation and cleaning device further includes: a control module, the control module is electrically connected to the metering module, the control module is electrically connected to the scale 301, and the control module is directly or indirectly electrically connected to the valves of each pipeline.

[0111] Thereby, automatic and accurate weighing of solvent materials and powder materials is achieved, and the quality of powder materials is automatically controlled, so as to ensure accurate control of required materials and accurately control the mixing time of solvent materials and powder materials in the mixing barrel.

[0112] The specific liquid preparation process of the automatic liquid preparation and cleaning device provided in this embodiment is described below:

[0113] After the preparation before dispensing is completed, turn on the power of the equipment.

[0114] First, the feeding mode is started. At this time, all valves of the automatic liquid dispensing and cleaning device are closed, and the upper cover of the required tank is opened. According to the corresponding material sequence, about 2 / 3 of the material in the tank A, B, C, K, L, M, and N is added. And the cleaning solvent is added to the cleaning tank 40. This step can be reasonably adjusted according to the specific remaining amount of the material in the tank.

[0115] Then tighten the clamps on all tanks to keep them completely sealed.

[0116] According to the preset conditions, the automatic liquid dispensing and cleaning device is turned on the automatic state. At this time, the first air inlet valve 102 and the first exhaust valve 107 of the liquid dispensing tank 10 are both opened, and inert gas is filled into the tank from the first air inlet valve 102. After a period of time (for example, 5 seconds), the first exhaust valve 107 is closed, and the first air inlet valve 102 is kept open, so that a slight positive pressure is maintained in the liquid dispensing tank 10, for example, the pressure in the tank bodies A, B, and C can be 0.05MPa. Similarly, the second air inlet valve 202 and the second exhaust valve 206 of the powder tank 20 are both opened, and inert gas is filled into the tank from the second air inlet valve 202. After a period of time (for example, 5 seconds), the second exhaust valve 206 is closed, and the second air inlet valve 202 is kept open, so that a slight positive pressure is maintained in the powder tank 20, for example, the pressure in the tank bodies K, L, M, and N can be 10Pa.

[0117] When the stirring barrel 406 needs to be cleaned, the equipment is started for one-key cleaning, and the stirring motor 401 starts to rotate. For example, the cleaning speed can be 30r / min. After a period of time (for example, 5 seconds), the valve of the cleaning tank 40 is opened to allow the cleaning solvent to flow to the stirring barrel 406, and the cleaning nozzle 405 rotates to spray the cleaning solvent on the inner wall of the stirring barrel 406 and the stirring rod. After a period of time (for example, 30 seconds), the cleaning nozzle 405 stops rotating, and the stirring blade 407 continues to rotate. At this time, about 1 / 3 of the cleaning solvent is in the stirring barrel 406. After a period of time (for example, 30 seconds), the solution discharge valve 411 and the reflux valve 413 are opened, and the solution delivery valve 417 is kept closed. At the same time, the solution pump 416 is opened to allow the cleaning solvent to flow back to the stirring barrel 406 through the cleaning reflux pipe 412, and the cleaning cycle is carried out for a period of time (for example, 5 minutes). Then the reflux valve 413 is closed, and the waste liquid valve 414 is opened. After a period of time (for example, 20 seconds), the solution pump 416 stops, and the cleaning solvent is completely discharged.

[0118] After cleaning is completed, the solvent delivery valve 109 is opened to allow the solvent material in the liquid preparation tank 10 to be injected into the stirring barrel 406. The liquid flow meter 108 feeds back the real-time flow rate to the control module. When the volume of the solvent material is about to reach the preset value, the solvent delivery valve 109 is slowly closed. When the volume of the solvent material reaches the preset value, the solvent delivery valve 109 is completely closed. The three tanks A, B, and C can be filled separately or simultaneously.

[0119] After the cleaning is completed or the solvent material is transported, the weighing of the powder material is started. The material delivery valve 210 is opened, and the vibration conveyor 209 starts to vibrate, so that the powder material is transported to the weighing tank 303. The scale 301 displays the weight in real time. When the weight reaches the specified standard, the material delivery valve 210 is closed and the vibration conveyor 209 stops. The powder materials transported by the four tanks K, L, M, and N need to be weighed separately. When the powder material is weighed, after standing for a certain time (for example, 30 seconds), the feed valve 409 is opened, and after waiting for a certain time (for example, 5 seconds), the discharge valve 304 is opened, and the material is transported downward to the mixing barrel 406. After a certain time (for example, 10 seconds), the vibrator 306 starts to vibrate, and the vibrator 306 promotes the powder material from the weighing tank to the mixing barrel 406 by vibrating the discharge pipe 305. After the vibrator 306 vibrates for a certain time (for example, 15 seconds), the discharge valve 304 is closed, the feed valve 409 is closed, and the powder material transportation is completed.

[0120] After the weighing is completed, the stirring blade 407 starts stirring, and the stirring blade 407 stirs at a preset speed (for example, a rotation speed of 150 r / min) for a preset time (for example, 12 hours).

[0121] When the stirring is finished, the solution delivery pipe is connected to the liquid supply barrel of the external equipment to start the automatic liquid supply. The third exhaust valve 403, the solution discharge valve 411, and the solution delivery valve 417 are opened, the solution pump 416 is started, and the solution is filtered by the filter 418 and then delivered to the liquid supply barrel of the subsequent equipment, and the liquid preparation is completed.

[0122] If cleaning is needed, you can start cleaning again. The steps are as above and will not be repeated here.

[0123] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. An automatic liquid preparation and cleaning device, characterized in that: include: A liquid dispensing unit (1) comprises at least one liquid dispensing tank (10) suitable for containing a solvent material, and a metering module suitable for performing statistics on the mass or flow rate of the solvent material discharged from the liquid dispensing tank (10); A powder delivery unit (2) comprising at least one powder tank (20) suitable for containing powder material; A weighing unit (3), comprising a weighing tank (303) connected to the powder conveying unit (2), and a scale (301) for weighing the weighing tank (303); The stirring unit (4) includes a stirring barrel (406) which is connected to the discharge end of the liquid preparation tank (10) and the discharge end of the weighing tank (303). The stirring unit (4) is provided with a stirring blade (407) suitable for stirring the solvent material and the powder material.

2. The automatic liquid preparation and cleaning device according to claim 1, characterized in that: The automatic liquid preparation and cleaning device further comprises: a cleaning tank (40), wherein the cleaning tank (40) is suitable for containing a cleaning solvent; A cleaning nozzle (405) is disposed in the stirring barrel (406), and the cleaning nozzle (405) is connected to the cleaning tank (40) to rinse the stirring barrel (406).

3. The automatic liquid preparation and cleaning device according to claim 1, characterized in that: The liquid dispensing tank (10) is connected to a first air intake pipe (101), and the first air intake pipe (101) is provided with a first air intake valve (102); the liquid dispensing tank (10) is also connected to a first exhaust pipe (106), and the first exhaust pipe (106) is provided with a first exhaust valve (107); And / or, the powder tank (20) is connected to a second air intake pipe (201), and the second air intake pipe (201) is provided with a second air intake valve (202); the powder tank (20) is also connected to a second exhaust pipe (205), and the second exhaust pipe (205) is provided with a second exhaust valve (206).

4. The automatic liquid preparation and cleaning device according to claim 3, characterized in that: The first air inlet pipe (101) is suitable for introducing an inert gas, and after the air in the liquid preparation tank (10) is exhausted through the first exhaust pipe (106), the first exhaust valve (107) is closed; and / or, the second air inlet pipe (201) is adapted to introduce an inert gas, and after the air in the powder tank (20) is exhausted through the second exhaust pipe (205), the second exhaust valve (206) is closed; And / or, the stirring barrel (406) is connected to a third exhaust pipe (404), and the third exhaust pipe (404) is provided with a third exhaust valve (403).

5. The automatic liquid preparation and cleaning device according to any one of claims 1 to 4, characterized in that: The powder tank (20) is connected to the weighing tank (303) via a material conveying pipe (211), and at least a part of the material conveying pipe (211) includes a flexible pipe (208) made of a flexible material; And / or, a vibration conveyor (209) is installed outside the material conveying pipe (211) to vibrate the material conveying pipe (211); the weighing tank (303) is provided with a discharge pipe (305), the discharge pipe (305) is provided with a discharge valve (304), and a vibrator (306) is installed outside the discharge pipe (305); And / or, the mixing barrel (406) is formed with a feed pipe (408) corresponding to the discharge pipe (305), the discharge pipe (305) and the feed pipe (408) are nested and connected, and the feed pipe (408) is provided with a feed valve (409).

6. The automatic liquid preparation and cleaning device according to any one of claims 1 to 4, characterized in that: The bottom of the stirring barrel (406) is connected to a solution delivery pipe (419), and the solution delivery pipe (419) is provided with a solution discharge valve (411); the solution delivery pipe (419) is also provided with a solution pump (416) suitable for pumping the solution, and the solution delivery pipe (419) is also provided with a filter (418); the solution delivery pipe (419) is also provided with a solution delivery valve (417) at a position downstream of the solution pump (416), and the solution delivery pipe (419) A cleaning reflux pipe (412) is also connected between the solution delivery valve (417) and the solution pump (416), and the other end of the cleaning reflux pipe (412) is connected to the stirring barrel (406); the cleaning reflux pipe (412) is provided with a reflux valve (413), and the cleaning reflux pipe (412) is also connected to a waste liquid delivery pipe (415) at an upstream position of the reflux valve (413), and the waste liquid delivery pipe (415) is provided with a waste liquid valve (414).

7. The automatic liquid preparation and cleaning device according to any one of claims 1 to 4, characterized in that: The liquid preparation tank (10) is further provided with a first pressure gauge (103) to monitor the pressure inside the liquid preparation tank (10) through the first pressure gauge (103); and / or the powder tank (20) is further provided with a second pressure gauge (203) to monitor the pressure inside the powder tank (20) through the second pressure gauge (203); The liquid preparation tank (10) is provided with a cover plate, and the cover plate is locked with the liquid preparation tank (10) by a first clamp (104); and / or, the powder tank (20) is provided with a cover plate, and the cover plate is locked with the powder tank (20) by a second clamp (204); and / or, the weighing tank (303) is provided with a cover plate, and the cover plate is locked with the weighing tank (303) by a third clamp (302); and / or, the stirring barrel (406) is provided with a cover plate, and the cover plate is locked with the stirring barrel (406) by a fourth clamp (410); The top or side wall of the liquid preparation tank (10) is also provided with a first viewing window (105); and / or the top or side wall of the powder tank (20) is also provided with a second viewing window (207); A solvent delivery pipe (110) is provided at the discharge end of each of the liquid preparation tanks (10), and the solvent delivery pipe (110) is provided with a solvent delivery valve (109); The powder tank (20) is connected to the weighing tank (303) via a material conveying pipe (211), and the material conveying pipe (211) is provided with a material conveying valve (210); The stirring blade (407) is located outside the stirring barrel (406) and a stirring motor (401) is also provided, and the stirring motor (401) is connected to the stirring blade (407); The cleaning tank (40) is connected to the stirring barrel (406) via a separate cleaning solvent feed port (402).

8. The automatic liquid preparation and cleaning device according to any one of claims 1 to 4, characterized in that: The liquid preparation unit (1) comprises three liquid preparation tanks (10), and the powder conveying unit (2) comprises four powder tanks (20).

9. The automatic liquid preparation and cleaning device according to claim 8, characterized in that: The three liquid preparation tanks (10) are respectively suitable for containing: N,N-dimethylformamide solvent, N-methylpyrrolidone solvent, and acetonitrile solvent; The four powder tanks (20) are respectively suitable for containing: powdered methylamine iodide, powdered lead iodide, powdered cesium iodide, and powdered methylamine chloride.

10. The automatic liquid preparation and cleaning device according to any one of claims 1 to 4, characterized in that: Also includes: A control module is electrically connected to the metering module, the control module is electrically connected to the scale (301), and the control module is directly or indirectly electrically connected to the valves of each pipeline.

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