Liquid preparation equipment, liquid preparation system and liquid preparation control method

Abstract

The invention provides liquid preparation equipment, a liquid preparation system and a liquid preparation control method, and relates to the field of liquid preparation equipment. In the liquid preparation equipment, a plurality of inlet ends of a first multi-channel switching valve are correspondingly communicated with a plurality of first stock solution tanks through corresponding first branch pipelines; the outlet end of the first multi-channel switching valve is communicated with the liquid preparation container through a first liquid inlet main pipeline, and the first multi-channel switching valve is used for controlling the corresponding first branch pipeline to be connected or disconnected with the first liquid inlet pipeline, so that the corresponding first stock solution tank and the liquid preparation container are connected or disconnected; a plurality of inlet ends of the second multi-channel switching valve are correspondingly communicated with a plurality of second stock solution tanks through second branch pipelines, an outlet end of the second multi-channel switching valve is communicated with the solution preparation container through a second solution inlet main pipeline, and the second multi-channel switching valve is used for controlling the second branch pipelines and the second solution inlet pipelines to be connected or disconnected; and the corresponding second stock solution tank and the solution preparation container are connected or disconnected. Various solutions can be proportionally prepared, and the solution preparation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid dispensing equipment, and in particular, to a liquid dispensing equipment, a liquid dispensing system and a liquid dispensing control method. Background Art

[0002] Liquid dispensing is to mix a variety of different liquids or solids in a certain proportion. Currently, most of the buffer solutions used in biological laboratories are self-prepared in the laboratory. Most of the operations need to be completed manually, which is a cumbersome and boring process, consuming a lot of time. At the same time, it is very difficult to ensure the consistency of the buffer solution, which easily leads to poor repeatability of experiments and is a real pain point problem in the industry.

[0003] Currently, the small-scale liquid dispensing products in the market are mainly desktop magnetic stirring systems. Such a system consists of a control system, a base with a magnetic drive motor and a weighing module, and a supporting container. It can connect multiple stirring bases to realize the simultaneous operation of multiple stirring units and improve efficiency. It transmits power through the magnetic coupling method, which is simple and easy to operate. However, currently, these liquid dispensing systems mainly play the role of automatic stirring, with low automation degree, and still require a lot of manual labor to achieve liquid dispensing.

[0004] The applicant of the present invention has found that the prior art has at least the following technical problems: when it is necessary to use multiple stock solutions to prepare a solution, it is usually necessary to set multiple inlet and outlet pipelines. At least one pipeline needs to be set for each stock solution tank to communicate with the liquid dispensing container. Therefore, when it is necessary to prepare different solutions, it is necessary to replace and disassemble different stock solution tanks, and the pipeline structure is complex, making it difficult to perform liquid dispensing operations and reducing the liquid dispensing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a liquid dispensing equipment, a liquid dispensing system and a liquid dispensing control method to solve the technical problem of low liquid dispensing efficiency of the liquid dispensing equipment when it is necessary to prepare different solutions in the prior art. The preferred technical solutions provided by the present invention can produce many technical effects, which will be elaborated below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A liquid dispensing equipment provided by the present invention includes an equipment main body, a first multi-channel switching valve and a second multi-channel switching valve located on the equipment main body, wherein:

[0008] Multiple inlet ends of the first multi-channel switching valve are correspondingly communicated with multiple first stock solution tanks through corresponding first branch pipelines, an outlet end of the first multi-channel switching valve is communicated with a liquid dispensing container through a first total liquid inlet pipeline, and the first multi-channel switching valve is used to control the conduction or blockage of the corresponding first branch pipeline and the first liquid inlet pipeline, so as to make the corresponding first stock solution tank and the liquid dispensing container conduct or block;

[0009] A plurality of inlet ends of the second multi-channel switching valve are correspondingly communicated with a plurality of second stock solution tanks through second branch pipelines. An outlet end of the second multi-channel switching valve is communicated with a dispensing container through a second main liquid inlet pipeline. The second multi-channel switching valve is used to control conduction or blockage between the corresponding second branch pipeline and the second liquid inlet pipeline, so as to enable conduction or blockage between the corresponding second stock solution tank and the dispensing container.

[0010] Preferably, the dispensing device further includes a weighing device which has a magnetic stirring part and is used to support the dispensing container.

[0011] Preferably, the dispensing device further includes a third multi-channel switching valve located on the device main body, wherein:

[0012] An inlet end of the third multi-channel switching valve is connected with one of outlet ends of the first multi-channel switching valve through an outlet main pipeline. Outlet ends of the third multi-channel switching valve are connected with two or more storage containers through corresponding outlet branch pipelines. The first multi-channel switching valve is used to control conduction between the dispensing container and the outlet main pipeline. The third multi-channel switching valve is used to control conduction or blockage between the outlet main pipeline and the corresponding storage container.

[0013] Preferably, a first liquid inlet pump, a second liquid inlet pump and an outlet pump are further arranged on the device main body, wherein:

[0014] The first liquid inlet pump is communicated with a first main liquid inlet pipeline. The second liquid inlet pump is communicated with the second main liquid inlet pipeline. The outlet pump is communicated with the outlet main pipeline.

[0015] Preferably, a filter, a pressure gauge, a pH detector and a conductivity detector which are communicated with the outlet main pipeline are arranged on the device main body, wherein:

[0016] The filter is used to filter particulate matters in the liquid; the pressure gauge is used to monitor the pressure in the outlet main pipeline;

[0017] The pH detector is used to detect the pH value of the solution in the outlet main pipeline;

[0018] The conductivity detector is used to detect the conductivity value of the solution in the outlet main pipeline.

[0019] The present invention further provides a dispensing system, including a first stock solution tank, a second stock solution tank, a first branch pipeline, a first liquid inlet pipeline, a second liquid inlet pipeline, a dispensing container and the above-mentioned dispensing device, wherein:

[0020] The number of the first stock solution tanks and the second stock solution tanks is multiple. All the first branch pipelines can be in a communicating state with the first total liquid inlet pipeline, so as to form the first liquid inlet pipeline;

[0021] All the second branch pipelines can be in a communicating state with the second total liquid inlet pipeline, so as to form the second liquid inlet pipeline;

[0022] The inner diameter of the first liquid inlet pipeline is equal to or not equal to that of the second liquid inlet pipeline.

[0023] The present invention provides a liquid preparation control method, which uses the above liquid preparation system. The control method includes:

[0024] During liquid preparation: make the first multi-channel switching valve communicate with the corresponding first stock solution tank and the liquid preparation container, and the stock solution in the first stock solution tank enters the liquid preparation container through the first liquid inlet pipeline;

[0025] Make the second multi-channel switching valve communicate with the corresponding second stock solution tank and the liquid preparation container, and the stock solution in the second stock solution tank enters the liquid preparation container through the second liquid inlet pipeline. The stock solution in the first stock solution tank and the stock solution in the second stock solution tank are mixed in proportion in the liquid preparation container;

[0026] When the inner diameters of the first liquid inlet pipeline and the second liquid inlet pipeline are not equal, for the two stock solutions in the liquid preparation container, make the stock solution with a larger demand flow through the one with a larger inner diameter among the first liquid inlet pipeline and the second liquid inlet pipeline.

[0027] Preferably, the liquid preparation system further includes a weighing device, the weighing device has a magnetic stirring part, and the liquid preparation container is located on the weighing device;

[0028] Use the weighing device to monitor the weight of the liquid in the liquid preparation container, and control the stock solution delivery amount of the first stock solution tank or the second stock solution tank through the change of the liquid weight in the liquid preparation container, so as to accurately control the solution ratio.

[0029] Preferably, the liquid preparation system further includes an outlet pipeline and a storage container, wherein: there is a communicating state between the liquid inlet of the outlet pipeline and the liquid preparation container, a third multi-channel switching valve is arranged on the outlet pipeline, and the outlet of the third multi-channel switching valve is connected to two or more storage containers;

[0030] The control method further includes:

[0031] During liquid outlet: control the second liquid inlet pipeline to be blocked from the liquid preparation container;

[0032] Connect the first multi-channel switching valve to the first liquid inlet pipeline and the liquid outlet pipeline, and control the third multi-channel switching valve to connect the liquid outlet pipeline and the corresponding liquid storage container, so that the solution in the liquid dispensing container flows into the corresponding liquid storage container through the first liquid inlet pipeline and the liquid outlet pipeline in sequence.

[0033] Preferably, the liquid dispensing system further includes a waste discharge pipeline. A first three-way valve is provided on the first liquid inlet pipeline, and a second three-way valve is provided on the second liquid inlet pipeline. The control method further includes:

[0034] Before replacing the new stock solution: Control the outlet of the first three-way valve to conduct with the waste discharge pipeline to drain the residual previous stock solution in the first liquid inlet pipeline; and / or, control the outlet of the second three-way valve to conduct with the waste discharge pipeline to drain the residual previous stock solution in the second liquid inlet pipeline;

[0035] After draining the previous stock solution: Control the outlet of the first three-way valve to conduct with the liquid dispensing container to connect the first liquid inlet pipeline and the liquid dispensing container;

[0036] Control the outlet of the second three-way valve to conduct with the liquid dispensing container to connect the second liquid inlet pipeline and the liquid dispensing container.

[0037] The liquid dispensing equipment, liquid dispensing system and liquid dispensing control method provided by the present invention have the following beneficial effects compared with the prior art: The first multi-channel switching valve can control the connection or blockage between the corresponding first stock solution tank and the liquid dispensing container, and the second multi-channel switching valve can control the connection or blockage between the corresponding second stock solution tank and the liquid dispensing container; The stock solutions in different first stock solution tanks and second stock solution tanks can be selected to flow into the liquid dispensing container, and proportional preparation of multiple solutions can be realized. The user can connect the corresponding components on the equipment main body through the first branch pipeline, the first total liquid inlet pipeline, the second branch pipeline and the second total liquid inlet pipeline, which simplifies the equipment structure, facilitates the liquid dispensing operation and improves the liquid dispensing efficiency. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 is the overall pipeline structure diagram of the liquid dispensing system;

[0040] Figure 2 is the structural schematic diagram at the first multi-channel switching valve;

[0041] Figure 3 It is a schematic diagram of the principle module of the liquid preparation control method;

[0042] Figure 4 It is a schematic diagram of the overall structure of one perspective of the liquid preparation equipment;

[0043] Figure 5 Schematic diagram of the overall structure of another perspective of the liquid preparation equipment.

[0044] In the figure, 100 is the liquid storage container; 101 is the first stock solution tank; 102 is the second stock solution tank; 2 is the first liquid inlet pipeline; 201 is the first branch pipeline; 202 is the first total liquid inlet path; 31 is the second branch pipeline; 32 is the second total liquid inlet path; 4 is the first liquid inlet pump; 5 is the second liquid inlet pump; 6 is the first multi-channel switching valve; 7 is the second multi-channel switching valve; 8 is the third multi-channel switching valve; 91 is the main liquid outlet pipeline; 92 is the liquid outlet branch pipeline; 10 is the liquid preparation container; 11 is the pressure gauge; 12 is the filter; 13 is the pH detector; 14 is the conductivity detector; 15 is the weighing device; 16 is the first three-way valve; 17 is the second three-way valve; 18 is the waste discharge pipeline. Detailed implementation manners

[0045] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope protected by the present invention.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. are based on the orientation or positional relationships 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 thus should not be construed as a limitation of the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] The embodiments of the present invention provide a liquid preparation system and a liquid preparation control method, which can realize the proportional preparation of multiple solutions. For the liquid preparation container, there are only two liquid inlet pipelines, which simplifies the pipeline structure in the device, facilitates the liquid preparation operation, and improves the liquid preparation efficiency.

[0048] The following combines Figures 1 - 5 to elaborate more specifically on the technical solutions provided by the present invention.

[0049] Example 1:

[0050] As Figure 1 and Figure 2 、 Figure 4 and Figure 5 shown, a liquid preparation system provided by the present invention includes a first stock solution tank 101, a second stock solution tank 102, a first liquid inlet pipeline 2, a second liquid inlet pipeline (the second liquid inlet pipeline includes a second branch pipeline 31 and a second liquid inlet main pipeline 32), and a liquid preparation container 10, wherein: the liquid inlet end of the first liquid inlet pipeline 2 is communicated with more than two first stock solution tanks 101, and a first multi-channel switching valve 6 is arranged on the first liquid inlet pipeline 2 for controlling the communication or blockage between the corresponding first stock solution tank 101 and the liquid preparation container 10; the liquid inlet end of the second liquid inlet pipeline is communicated with more than two second stock solution tanks 102, and a second multi-channel switching valve 7 is arranged on the second liquid inlet pipeline for controlling the communication or blockage between the corresponding second stock solution tank 102 and the liquid preparation container 10; the inner diameters of the first liquid inlet pipeline 2 and the second liquid inlet pipeline are equal or unequal.

[0051] A first liquid inlet pump 4 is arranged on the first liquid inlet pipeline 2, and a second liquid inlet pump 5 is arranged on the second liquid inlet pipeline.

[0052] In this embodiment, a variety of stock solutions can be communicated with the liquid preparation container 10 through the first multi-channel switching valve 6. Refer to Figure 1 shown, Figure 1 wherein the liquid inlet end of the first liquid inlet pipeline 2 is communicated with more than two first stock solution tanks 101, and the stock solutions in the first stock solution tanks 101 are different. Specifically, they can be the same component with different concentrations, or different components. The stock solutions in the second stock solution tanks 102 are different. Specifically, they can be the same component with different concentrations, or different components.

[0053] The first multi-channel switching valve 6 and the second multi-channel switching valve 7 can be rotary switching valves in the prior art, or combined switch valves. For example, Figure 1 in, the first multi-channel switching valve 6 takes the rotary switching valve as an example, and the second multi-channel switching valve 7 takes the combined switch as an example. As Figure 1 shown, when it is necessary to use the stock solution in the corresponding first stock solution tank 101 to be input into the liquid preparation container 10, the first multi-channel switching valve 6 rotates to connect the inlet with its outlet, and the selection of the stock solution can be realized.

[0054] As an optional implementation manner, refer to Figure 1 and Figure 2As shown in the figure, the first liquid inlet pipeline 2 includes a first branch pipeline 201 and a first main liquid inlet pipeline 202, where: the first branch pipelines 201 are provided in one-to-one correspondence with the number of the first stock solution tanks 101, and the liquid inlet of each first branch pipeline 201 is communicated with the corresponding first stock solution tank 101. The inlet of the first multi-channel switching valve 6 is communicated with the corresponding first branch pipeline 201, and the outlet of the first multi-channel switching valve 6 is communicated with the first main liquid inlet pipeline 202. When one of the inlets of the first multi-channel switching valve 6 is communicated with the outlet of the first multi-channel switching valve 6, the first main liquid inlet pipeline 202 is only communicated with the corresponding first branch pipeline 201 and the first main liquid inlet pipeline 202.

[0055] The first branch pipelines 201 are in one-to-one correspondence with the number and position of the first stock solution tanks 101. When the inlet of the first multi-channel switching valve 6 is switched to different first branch pipelines 201, the only first branch pipeline 201 is conducted with the first main liquid inlet pipeline 202, so as to conduct the corresponding first stock solution tank 101 and the first main liquid inlet pipeline 202.

[0056] As an optional implementation manner, the second liquid inlet pipeline includes a second branch pipeline 31 and a second main liquid inlet pipeline 32, where: the second branch pipelines 31 are provided in one-to-one correspondence with the number of the second stock solution tanks 102, and the liquid inlet of each second branch pipeline 31 is communicated with the corresponding second stock solution tank 102. The inlet of the second multi-channel switching valve 7 is communicated with the corresponding second branch pipeline 31, and the outlet of the second multi-channel switching valve 7 is communicated with the second main liquid inlet pipeline 32. When one of the inlets of the second multi-channel switching valve 7 is communicated with the outlet of the second multi-channel switching valve 7, the second main liquid inlet pipeline 32 is only communicated with the corresponding second branch pipeline 31 and the second main liquid inlet pipeline 32.

[0057] The second branch pipelines 31 are in one-to-one correspondence with the number and position of the second stock solution tanks 102. When the inlet of the second multi-channel switching valve 7 is switched to different second branch pipelines 31, the only second branch pipeline 31 is conducted with the second main liquid inlet pipeline 32, so as to conduct the corresponding second stock solution tank 102 and the second main liquid inlet pipeline 32.

[0058] As an optional implementation manner, refer to Figure 1 As shown in the figure, the liquid dispensing system of this embodiment further includes an outlet pipeline and a storage container 100, where: there is a communication state between the inlet of the outlet pipeline and the liquid dispensing container 10. A third multi-channel switching valve 8 is provided on the outlet pipeline, and the outlet of the third multi-channel switching valve 8 is connected to two or more storage containers 100. The third multi-channel switching valve 8 is used to control the conduction or blockage of the outlet pipeline and the corresponding storage container 100. An outlet pump is provided on the outlet pipeline.

[0059] In the liquid preparation system of this embodiment, after the solution with the target ratio is prepared in the liquid preparation container 10, the third multi-channel switching valve 8 controls the liquid outlet pipeline to communicate with the corresponding liquid storage container 100, and the solution in the liquid preparation container 10 is transported to the storage container through the liquid outlet pipeline for storage. Among them, the number of storage containers is more than two, and different solutions can be stored, which is convenient to use.

[0060] As an alternative embodiment, refer to Figure 1 As shown, the liquid inlet of the liquid outlet pipeline is connected to the outlet of the first multi-channel switching valve 6. The first multi-channel switching valve 6 can connect the first liquid inlet pipeline 2 with the liquid outlet pipeline, so that the solution in the liquid preparation container 10 flows into the corresponding liquid storage container 100 through the first liquid inlet pipeline 2 and the liquid outlet pipeline in sequence.

[0061] When it is necessary to transport the prepared solution, the inlet and outlet of the first multi-channel switching valve 6 are respectively connected to the first liquid inlet pipeline 2 (the first liquid inlet main pipeline 202) and the liquid outlet pipeline. The prepared solution in the liquid preparation container 10 flows into the corresponding liquid storage container 100 through the first liquid inlet pipeline 2 and the liquid outlet pipeline in sequence. When it is necessary to transport the prepared solution, the first liquid inlet pipeline 2 that originally transported the stock solution in the first stock solution tank 101 is now used to transport the prepared solution, which simplifies the pipeline structure. Even when the liquid preparation container 10 needs to transport the prepared solution, only the first liquid inlet main pipeline 202 and the second liquid inlet main pipeline 32 are connected to it, and the operation is convenient.

[0062] As an alternative embodiment, refer to Figure 1 As shown, the liquid outlet pipeline includes a liquid outlet main pipeline 91 and a liquid outlet branch pipeline 92, where: the inlet of the third multi-channel switching valve 8 is connected to the liquid outlet main pipeline 91, the liquid outlet branch pipelines 92 are provided in one-to-one correspondence with the number of liquid storage containers 100, and the outlet of the third multi-channel switching valve 8 is connected to the corresponding liquid storage container 100; there is a connection state between the liquid outlet main pipeline 91 and the liquid preparation container 10, and when one of the outlets of the third multi-channel switching valve 8 is connected to the liquid storage container 100, the liquid outlet main pipeline 91 is only connected to the corresponding liquid storage container 100.

[0063] The liquid outlet branch pipelines 92 are provided in one-to-one correspondence with the number and position of the liquid storage containers 100. When the inlet of the third multi-channel switching valve 8 is switched to different liquid outlet branch pipelines 92, the only liquid outlet main pipeline 91 is connected to the liquid outlet branch pipeline 92, so as to realize the connection between the corresponding liquid preparation container 10 and the liquid storage container 100.

[0064] A pH detector 13 is provided on the liquid preparation container 10 or the liquid outlet pipeline for detecting the pH value of the solution in the liquid preparation container 10; a conductivity detector 14 is provided on the liquid preparation container 10 or the liquid outlet pipeline for detecting the conductivity value of the solution in the liquid preparation container 10. A filter 12 and a pressure gauge 11 are connected to the liquid outlet pipeline. Among them, the filter 12 is used to filter particulate matter in the liquid, and the inlet of the bypass waste branch is connected to the outlet of the filter 12; the pressure gauge 11 is used to monitor the pressure in the liquid outlet pipeline to prevent excessive pressure caused by filter blockage, resulting in pipeline rupture.

[0065] Embodiment 2

[0066] See Figure 4 and Figure 5 As shown, this embodiment provides a liquid preparation device. The liquid preparation device of this embodiment includes a device main body, a first multi-channel switching valve 6 and a second multi-channel switching valve 7 located on the device main body. Among them, multiple inlet ends of the first multi-channel switching valve 6 are correspondingly connected to multiple first stock solution tanks through corresponding first branch pipelines 201, and the outlet end of the first multi-channel switching valve 6 is connected to the liquid preparation container through a first liquid inlet main pipeline 202. The first multi-channel switching valve 6 is used to control the conduction or blockage of the corresponding first branch pipeline 201 and the first liquid inlet pipeline, so as to make the corresponding first stock solution tank 101 and the liquid preparation container 10 conduct or block; multiple inlet ends of the second multi-channel switching valve 7 are correspondingly connected to multiple second stock solution tanks 102 through second branch pipelines 31, and the outlet end of the second multi-channel switching valve 7 is connected to the liquid preparation container through a second liquid inlet main pipeline 32. The second multi-channel switching valve 7 is used to control the conduction or blockage of the corresponding second branch pipeline 31 and the second liquid inlet pipeline, so as to make the corresponding second stock solution tank and the liquid preparation container conduct or block.

[0067] In the liquid preparation device of this embodiment, the user can connect the corresponding components on the device main body using the first branch pipeline 201, the first liquid inlet main pipeline 202, the second branch pipeline 31 and the second liquid inlet main pipeline 32, which simplifies the device structure, facilitates the liquid preparation operation, and improves the liquid preparation efficiency.

[0068] On the basis of the above embodiment, the first branch pipeline 201, the first liquid inlet main pipeline 202, the second branch pipeline 31, the second liquid inlet main pipeline 32, the first stock solution tank 101, the liquid preparation container 10, the second liquid inlet main pipeline 32, the liquid storage container 100, the liquid outlet main pipeline 91 and the liquid outlet branch pipeline 92 are all provided by the user himself. This embodiment only provides a device with the above first multi-channel switching valve 6, second multi-channel switching valve 7, third multi-channel switching valve 8, corresponding pump bodies, pressure gauges, filters, pH detectors, conductivity detectors and weighing devices provided on the device main body.

[0069] Embodiment 3

[0070] See Figures 1 - 3As shown in the figure, this embodiment provides a liquid preparation control method, which uses the above liquid preparation system. The control method includes: during liquid preparation: connecting the first multi-channel switching valve 6 to communicate with the corresponding first stock solution tank 101 and the liquid preparation container 10, and the stock solution in the first stock solution tank 101 enters the liquid preparation container 10 through the first liquid inlet pipeline 2; connecting the second multi-channel switching valve 7 to communicate with the corresponding second stock solution tank 102 and the liquid preparation container 10, and the stock solution in the second stock solution tank 102 enters the liquid preparation container 10 through the second liquid inlet pipeline. The stock solution in the first stock solution tank 101 and the stock solution in the second stock solution tank 102 are mixed in proportion in the liquid preparation container 10; when the inner diameters of the first liquid inlet pipeline 2 and the second liquid inlet pipeline are not equal, for the two stock solutions in the liquid preparation container 10, the stock solution with a larger demand flows through the one with a larger inner diameter among the first liquid inlet pipeline 2 and the second liquid inlet pipeline.

[0071] The liquid preparation control method of this embodiment controls the first multi-channel switching valve 6 and the second multi-channel switching valve 7. Different stock solutions are pumped into the liquid preparation container 10 through the branch pipelines respectively through the first multi-channel switching valve 6 and the second multi-channel switching valve 7 for mixing. When the first multi-channel switching valve 6 and the second multi-channel switching valve 7 are electrically connected to the controller, the liquid preparation process does not require manual participation, has a high degree of automation, saves labor, and can ensure the accuracy of each ratio and has a high repeat accuracy.

[0072] During the liquid preparation process, different amounts of stock solutions are required. To ensure the liquid preparation efficiency and the accuracy of the ratio, different stock solutions need to be divided into two parts: a large amount and a small amount according to the usage. It is more efficient to transport the stock solution with a large usage through a pipeline with a larger inner diameter, and it is possible to precisely control the usage by transporting the stock solution with a small usage through a pipeline with a smaller inner diameter. In this way, the first liquid inlet pipeline 2 and the second liquid inlet pipeline are used to transport the stock solution with a larger usage and the stock solution with a smaller usage respectively, which improves the accuracy of the ratio while ensuring the liquid preparation efficiency.

[0073] As an optional implementation manner, refer to Figure 1 As shown in the figure, the liquid preparation system of this embodiment further includes a weighing device 15. The weighing device 15 has a magnetic stirring part, and the liquid preparation container 10 is located on the weighing device 15; the weighing device 15 is used to monitor the weight of the liquid in the liquid preparation container 10, and control the stock solution delivery volume of the first stock solution tank 101 or the second stock solution tank 102 through the change of the weight of the liquid in the liquid preparation container 10, so as to accurately control the ratio of the solution.

[0074] The weighing device 15 with a magnetic stirring part is used to weigh and stir the liquid in the tank. The weighing device 15 can monitor the weight of the liquid in the dispensing tank in real time, control the amount of the stock solution transported by the change of the weight, and then achieve the precise control of the solution ratio. The weighing device 15 with a magnetic stirring part is an instrument integrating a weighing module and magnetic stirring, which belongs to the prior art and can refer to the Chinese utility model patent CN219830083U.

[0075] As an optional implementation manner, the control method of this embodiment further includes: when discharging liquid: controlling the second liquid inlet pipeline to be blocked from the dispensing container 10; making the first multi-channel switching valve 6 connect the first liquid inlet pipeline 2 and the liquid outlet pipeline, and controlling the third multi-channel switching valve 8 to connect the liquid outlet pipeline and the corresponding storage container 100, so that the solution in the dispensing container 10 flows into the corresponding storage container 100 through the first liquid inlet pipeline 2 and the liquid outlet pipeline in sequence.

[0076] The third multi-channel switching valve 8 is arranged on the liquid outlet pipeline to control the connection or disconnection of multiple storage containers 100 with the dispensing container 10 respectively, so as to facilitate the transportation of solutions with different ratios to the corresponding storage tanks. When the third multi-channel switching valve 8 is electrically connected to the controller, the process of transporting the solution does not require manual participation, and the degree of automation is high, which not only saves labor, but also can ensure the accuracy of each ratio and has a high repeat accuracy.

[0077] As an optional implementation manner, see Figure 1 As shown, the dispensing system further includes a waste discharge pipeline 18. A first three-way valve 16 is arranged on the first liquid inlet pipeline 2, and a second three-way valve 17 is arranged on the second liquid inlet pipeline. The control method further includes: before replacing the new stock solution: controlling the outlet of the first three-way valve 16 to be conducted with the waste discharge pipeline 18 to drain the residual previous stock solution in the first liquid inlet pipeline 2; and / or controlling the outlet of the second three-way valve 17 to be conducted with the waste discharge pipeline 18 to drain the residual previous stock solution in the second liquid inlet pipeline; after draining the previous stock solution: controlling the outlet of the first three-way valve 16 to be conducted with the dispensing container 10 to connect the first liquid inlet pipeline 2 with the dispensing container 10; controlling the outlet of the second three-way valve 17 to be conducted with the dispensing container 10 to connect the second liquid inlet pipeline with the dispensing container 10.

[0078] Since multiple stock solution tanks share the first liquid inlet pipeline 2 or the second liquid inlet pipeline, when one type of stock solution is completely delivered and another type of stock solution needs to be switched for delivery, however, there is still the previous type of stock solution remaining in the first liquid inlet pipeline 2 or the second liquid inlet pipeline. At this time, when the new stock solution is delivered, the remaining previous type of stock solution in the liquid inlet pipeline will be delivered into the liquid preparation container 10 together, which results in a decrease in the final proportioning accuracy. After a first three-way valve 16 and a second three-way valve 17 are respectively arranged on the two first liquid inlet pipelines 2 and the second liquid inlet pipelines, when switching to a new stock solution, the first three-way valve 16 and the second three-way valve 17 are communicated with the waste discharge pipeline 18, and the remaining previous type of stock solution in the first liquid inlet pipeline 2 and the second liquid inlet pipeline is ejected and discharged with the new stock solution. After the previous type of stock solution is discharged, the first three-way valve 16 and the second three-way valve 17 are switched to be communicated with the liquid preparation container 10, and the new stock solution is delivered to the liquid preparation container 10. In this way, it can be ensured that each type of stock solution can be delivered to the liquid preparation container 10 in an accurate amount for proportioning, and the liquid preparation is more accurate.

[0079] When the first three-way valve 16 and the second three-way valve 17 are electrically connected to the controller, the waste discharge process does not require manual participation, and the degree of automation is high. It not only saves labor, but also can ensure the accuracy of each proportioning and has a high repeat accuracy.

[0080] In the description of this specification, specific features, structures or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0081] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] As described above, only the specific implementation manners of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all of them should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A liquid preparation device, characterized in that: The device comprises a device body, a first multi-channel switching valve and a second multi-channel switching valve located on the device body, wherein: The multiple inlet ends of the first multi-channel switching valve are connected to the multiple first raw liquid tanks through the corresponding first branch pipelines, and the outlet end of the first multi-channel switching valve is connected to the liquid distribution container through the first liquid inlet main line. The first multi-channel switching valve is used to control the connection or blocking of the corresponding first branch pipeline and the first liquid inlet pipeline, so as to connect or block the corresponding first raw liquid tank and the liquid distribution container; The multiple inlet ends of the second multi-channel switching valve are connected to the multiple second raw liquid tanks through the second branch pipeline, and the outlet end of the second multi-channel switching valve is connected to the liquid preparation container through the second liquid inlet main line. The second multi-channel switching valve is used to control the corresponding second branch pipeline and the second liquid inlet pipeline to be connected or blocked, thereby connecting or blocking the corresponding second raw liquid tank and the liquid preparation container.

2. The liquid dispensing device according to claim 1, characterized in that: The liquid preparation equipment further comprises a weighing device having a magnetic stirring portion, and the weighing device is used to support the liquid preparation container.

3. The liquid dispensing device according to claim 1, characterized in that: The liquid dispensing device further comprises a third multi-channel switching valve located on the device body, wherein: The inlet end of the third multi-channel switching valve is connected to one of the outlet ends of the first multi-channel switching valve through a liquid outlet main line, and the outlet end of the third multi-channel switching valve is connected to two or more liquid storage containers through corresponding liquid outlet branch pipelines. The first multi-channel switching valve is used to control the connection between the liquid preparation container and the liquid outlet main line, and the third multi-channel switching valve is used to control the connection or blocking between the liquid outlet main line and the corresponding liquid storage container.

4. The liquid dispensing device according to claim 3, characterized in that: The main body of the device is also provided with a first liquid inlet pump, a second liquid inlet pump and a liquid outlet pump, wherein: The first liquid inlet pump is connected to the first liquid inlet main line, the second liquid inlet pump is connected to the second liquid inlet main line, and the liquid outlet pump is connected to the liquid outlet main line.

5. The liquid dispensing device according to claim 3, characterized in that: The equipment body is provided with a filter, a pressure gauge, a pH detector and a conductivity detector which are connected to the main liquid outlet pipe, wherein: The filter is used to filter particles in the liquid; the pressure gauge is used to monitor the pressure in the main liquid outlet pipe; The pH detector is used to detect the pH value of the solution in the liquid outlet main pipeline; The conductivity detector is used to detect the conductivity value of the solution in the main liquid outlet line.

6. A liquid preparation system, characterized in that: The invention comprises a first raw liquid tank, a second raw liquid tank, a first branch pipeline, a first liquid inlet pipeline, a second liquid inlet pipeline, a liquid preparation container and the liquid preparation device according to any one of claims 1 to 5, wherein: There are multiple first stock liquid tanks and multiple second stock liquid tanks, and all the first branch pipelines can be connected to the first liquid inlet main pipeline, thereby forming the first liquid inlet pipeline; All the second branch pipelines can be in communication with the second liquid inlet main pipeline, thereby forming the second liquid inlet pipeline; The inner diameter of the first liquid inlet pipeline is equal to or unequal to the inner diameter of the second liquid inlet pipeline.

7. A liquid preparation control method, characterized in that: Using the liquid dispensing system according to claim 6, the control method comprises: When dispensing liquid: the first multi-channel switching valve is connected to the first raw liquid tank and the liquid dispensing container, and the raw liquid in the first raw liquid tank enters the liquid dispensing container through the first liquid inlet pipeline; The second multi-channel switching valve is connected to the corresponding second stock liquid tank and the liquid preparation container, the stock liquid in the second stock liquid tank enters the liquid preparation container through the second liquid inlet pipeline, and the stock liquid in the first stock liquid tank and the stock liquid in the second stock liquid tank are mixed in the liquid preparation container in proportion; When the inner diameters of the first liquid inlet pipeline and the second liquid inlet pipeline are not equal, the one with a larger demand among the two raw liquids in the liquid preparation container is made to flow through the one with a larger inner diameter between the first liquid inlet pipeline and the second liquid inlet pipeline.

8. The liquid dispensing control method according to claim 7, characterized in that: The liquid preparation system further comprises a weighing device, the weighing device has a magnetic stirring part, and the liquid preparation container is located on the weighing device; The weighing device is used to monitor the weight of the liquid in the liquid preparation container, and the amount of stock liquid delivered to the first stock liquid tank or the second stock liquid tank is controlled by controlling the change in the weight of the liquid in the liquid preparation container, thereby accurately controlling the ratio of the solution.

9. The liquid dispensing control method according to claim 7, characterized in that: The liquid dispensing system further comprises a liquid outlet pipeline and a liquid storage container, wherein: a liquid inlet of the liquid outlet pipeline is in communication with the liquid dispensing container, a third multi-channel switching valve is provided on the liquid outlet pipeline, and an outlet of the third multi-channel switching valve is connected to two or more liquid storage containers; The control method further comprises: When discharging liquid: controlling the second liquid inlet pipeline to be blocked from the liquid dispensing container; The first multi-channel switching valve is connected to the first liquid inlet pipeline and the liquid outlet pipeline, and the third multi-channel switching valve is controlled to connect the liquid outlet pipeline and the corresponding liquid storage container, so that the solution in the liquid preparation container flows into the corresponding liquid storage container through the first liquid inlet pipeline and the liquid outlet pipeline in sequence.

10. The liquid dispensing control method according to claim 7, characterized in that: The liquid distribution system further includes a waste discharge pipeline, a first three-way valve is provided on the first liquid inlet pipeline, and a second three-way valve is provided on the second liquid inlet pipeline. The control method further includes: Before replacing the new stock solution: controlling the outlet of the first three-way valve to be connected to the waste discharge pipeline to drain the previous stock solution remaining in the first liquid inlet pipeline; and / or controlling the outlet of the second three-way valve to be connected to the waste discharge pipeline to drain the previous stock solution remaining in the second liquid inlet pipeline; After the last stock liquid is completely discharged: controlling the outlet of the first three-way valve to be connected to the liquid preparation container, and connecting the first liquid inlet pipeline to the liquid preparation container; The outlet of the second three-way valve is controlled to be connected to the liquid preparation container, and the second liquid inlet pipeline is connected to the liquid preparation container.

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