High-precision liquid preparation equipment and high-precision liquid preparation system

Abstract

The utility model provides high-precision liquid preparation equipment and a high-precision liquid preparation system, the high-precision liquid preparation equipment comprises an equipment main body, a first three-way valve and a second three-way valve which are arranged on the equipment main body, the first three-way valve is communicated with a first liquid inlet pipeline between a first stock solution tank and a liquid preparation container, and the second three-way valve is communicated with a second liquid inlet pipeline between a second stock solution tank and a liquid preparation container; an outlet of the first three-way valve is communicated with the waste discharge pipeline or the liquid preparation container, so that the first liquid inlet pipeline is communicated with the waste discharge pipeline or the liquid preparation container; the second three-way valve is communicated with the second liquid inlet pipeline between the second stock solution tank and the liquid preparation container, and an outlet of the second three-way valve is communicated with the waste discharge pipeline or the liquid preparation container, so that the second liquid inlet pipeline is communicated with the waste discharge pipeline or the liquid preparation container; when a new mother solution is switched, the first three-way valve and the second three-way valve are controlled, the new mother solution is used for ejecting out the last mother solution remaining in the first liquid inlet pipeline or the second liquid inlet pipeline and discharging waste, it is guaranteed that each mother solution can be conveyed to the solution preparation container in an accurate amount for proportioning, and solution preparation is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of liquid preparation equipment technology, and in particular to a precision liquid preparation equipment and a high-precision liquid preparation system. Background Technology

[0002] Solution preparation involves mixing various liquids or solids together in a certain proportion. Currently, most buffer solutions used in biological laboratories are prepared in-house, and most operations need to be done manually. This process is tedious, time-consuming, and difficult to ensure the consistency of the buffer solution, which can lead to poor experimental repeatability. This is a real pain point in the industry.

[0003] In the prior art, the raw material tank is connected to the mixing container through an inlet pipe. Specifically, the two raw material tanks are connected to the mixing container through two oil inlet pipes, and the two raw materials are mixed in the mixing container according to a certain ratio.

[0004] The applicant has discovered that the prior art has at least the following technical problems: In the prior art, the raw liquid tank is connected to the liquid preparation container through the liquid inlet pipe. When one type of mother liquor is delivered, it is necessary to switch to another type of mother liquor for delivery. However, there is still the previous type of mother liquor in the liquid inlet pipe. When the new mother liquor is delivered, the residual previous type of mother liquor in the liquid inlet pipe will be delivered to the liquid preparation container together, which leads to a decrease in the final solution ratio accuracy. Utility Model Content

[0005] The purpose of this utility model is to provide a high-precision liquid preparation device and a high-precision liquid preparation system to solve the technical problem in the prior art where, when preparing a new mother liquor, residual previous different mother liquors in the inlet pipeline are transported together with the new mother liquor into the liquid preparation container, resulting in low solution ratio accuracy. The various technical effects of the preferred technical solutions provided by this utility model are described in detail below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The high-precision liquid preparation device provided by this utility model includes a device body, a first three-way valve and a second three-way valve disposed on the device body, wherein:

[0008] The first three-way valve is connected to the first inlet pipeline between the first raw liquid tank and the liquid preparation container, and the outlet of the first three-way valve is connected to the waste discharge pipeline or the liquid preparation container, thereby connecting the first inlet pipeline to the waste discharge pipeline or the liquid preparation container.

[0009] The second three-way valve is connected to the second inlet pipeline between the second raw liquid tank and the liquid preparation container. The outlet of the second three-way valve is connected to the waste discharge pipeline or the liquid preparation container, thereby connecting the second inlet pipeline to the waste discharge pipeline or the liquid preparation container.

[0010] Preferably, the main body of the device is further provided with a first multi-channel switching valve and a second multi-channel switching valve, wherein:

[0011] The first multi-channel switching valve has multiple inlet ends connected to multiple first raw material tanks through corresponding first branch pipelines, and the first multi-channel switching valve has an outlet end connected to a liquid preparation container through a first liquid inlet main. The first multi-channel switching valve is used to control the connection or blockage between the corresponding first branch pipeline and the first liquid inlet pipeline, thereby connecting or blocking the corresponding first raw material tank and the liquid preparation container.

[0012] The multiple inlet ends of the second multi-channel switching valve are connected to the multiple second raw material tanks through the second branch pipelines, and the outlet end of the second multi-channel switching valve is connected to the liquid preparation container through the second liquid inlet main. The second multi-channel switching valve is used to control the connection or blockage between the corresponding second branch pipeline and the second liquid inlet pipeline, thereby connecting or blocking the corresponding second raw material tank and the liquid preparation container.

[0013] Preferably, the high-precision liquid preparation device further includes a third multi-channel switching valve located on the main body of the device, wherein:

[0014] The inlet of the third multi-channel switching valve can be connected to the liquid preparation container through the liquid outlet main pipeline. One of the outlets of the third multi-channel switching valve is connected to the waste liquid container through a pipeline. The other outlets of the third multi-channel switching valve are connected to two or more liquid storage containers through corresponding liquid outlet branch pipelines.

[0015] When the liquid preparation container is connected to the main liquid outlet pipeline, the third multi-channel switching valve is used to control whether the main liquid outlet pipeline is connected to or blocked from the waste liquid container or the corresponding liquid storage container.

[0016] Preferably, the liquid preparation equipment further includes a weighing device, which has a magnetic stirring section and is used to support the liquid preparation container.

[0017] Preferably, the main body of the equipment is further provided with a first inlet pump, a second inlet pump, and an outlet pump, wherein:

[0018] The first inlet pump is connected to the first inlet main line, the second inlet pump is connected to the second inlet main line, and the outlet pump is connected to the outlet main line.

[0019] Preferably, the main body of the device is equipped with a filter, a pressure gauge, a pH meter, and a conductivity meter connected to the main liquid outlet pipeline, wherein:

[0020] The filter is used to filter particulate matter from the liquid; the pressure gauge is used to monitor the pressure in the main liquid outlet line.

[0021] The pH meter is used to detect the pH value of the solution in the main outlet pipeline;

[0022] The conductivity meter is used to detect the conductivity value of the solution in the main outlet pipeline.

[0023] This utility model also provides a high-precision liquid preparation system, including a first stock solution tank, a second stock solution tank, a first branch pipeline, a first inlet pipeline, a second inlet pipeline, a liquid preparation container, and a high-precision liquid preparation device, wherein:

[0024] The inner diameter of the first liquid inlet pipe may be equal to or different from the inner diameter of the second liquid inlet pipe.

[0025] Preferably, the waste discharge pipeline includes a first waste discharge branch, a second waste discharge branch, and a main waste discharge pipeline, wherein:

[0026] The first waste discharge branch is connected to one of the outlets of the first three-way valve, the second waste discharge branch is connected to one of the outlets of the second three-way valve, and the waste discharge main is connected to the first waste discharge branch and the second waste discharge branch.

[0027] Preferably, a one-way valve is provided on the waste discharge main line, and the one-way valve only allows waste liquid in the first waste discharge branch and the second waste discharge branch to flow to the waste discharge main line.

[0028] Preferably, the high-precision liquid preparation device further includes a third multi-channel switching valve located on the main body of the device, wherein:

[0029] The inlet of the third multi-channel switching valve can be connected to the liquid preparation container through the liquid outlet main pipeline. One of the outlets of the third multi-channel switching valve is connected to the waste liquid container through a pipeline. The other outlets of the third multi-channel switching valve are connected to two or more liquid storage containers through corresponding liquid outlet branch pipelines.

[0030] When the liquid preparation container is connected to the liquid outlet main pipeline, the third multi-channel switching valve is used to control the connection or blockage between the liquid outlet main pipeline and the waste liquid container or the corresponding liquid storage container.

[0031] The liquid preparation system also includes a bypass waste discharge branch, wherein: the inlet of the bypass waste discharge branch is connected to the main outlet branch and is connected to the upstream side of the third multi-channel switching valve; a bypass valve is provided on the bypass waste discharge branch, and the bypass valve is used to control the connection or blockage between the bypass waste discharge branch and the waste liquid container.

[0032] The high-precision liquid mixing equipment and system provided by this utility model have the following advantages compared with the prior art: A first three-way valve is provided on the first inlet pipe, and a second three-way valve is provided on the second inlet pipe. When switching to a new mother liquor, the first three-way valve is connected to the waste discharge pipe, and the second three-way valve is connected to the waste discharge pipe. The new mother liquor pushes out the residual previous mother liquor in the first or second inlet pipe and discharges the waste. After the previous mother liquor is discharged, the first or second three-way valve is switched to connect to the liquid mixing container, and the new mother liquor is delivered to the liquid mixing container. With this setting, it can be ensured that each mother liquor can be delivered to the liquid mixing container in an accurate amount for mixing, making the liquid mixing more precise. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall piping structure of a high-precision liquid preparation system;

[0035] Figure 2 This is a magnified view of a portion of the waste discharge pipeline at the liquid preparation container;

[0036] Figure 3 This is a magnified view of a portion of the liquid storage container;

[0037] Figure 4 This is a structural schematic diagram of a high-precision liquid preparation device from one perspective.

[0038] Figure 5 This is a structural schematic diagram of a high-precision liquid preparation device from another perspective.

[0039] In the diagram: 100, storage container; 101, first raw material tank; 102, second raw material tank; 2, first inlet pipe; 3, second inlet pipe; 4, first inlet pump; 5, second inlet pump; 6, first multi-channel switching valve; 7, second multi-channel switching valve; 8, third multi-channel switching valve; 91, main outlet pipe; 92, outlet branch pipe; 10, mixing container; 11, pressure gauge; 12, filter; 13, pH meter; 14, conductivity meter; 15, weighing device; 16, first three-way valve; 17, second three-way valve; 18, first waste discharge branch; 19, second waste discharge branch; 20, main waste discharge line; 21, check valve; 22, waste liquid container; 23, bypass waste discharge branch; 24, bypass valve. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] This utility model provides a high-precision liquid preparation device and a high-precision liquid preparation system, ensuring that each mother liquor can be delivered to the liquid preparation container in an accurate quantity for mixing, making the liquid preparation more precise.

[0044] The following is combined with Figures 1-3 The technical solution provided by this utility model will be described in more detail.

[0045] Example 1:

[0046] The high-precision liquid preparation system provided in this embodiment includes a first raw liquid tank 101, a second raw liquid tank 102, a first liquid inlet pipe 2, a second liquid inlet pipe 3, a liquid preparation container 10, and a waste discharge pipe. The inlet end of the first liquid inlet pipe 2 is connected to the first raw liquid tank 101. A first three-way valve 16 is installed on the first liquid inlet pipe 2, and the outlet of the first three-way valve 16 is connected to the waste discharge pipe or the liquid preparation container 10, thereby connecting the first liquid inlet pipe 2 to the waste discharge pipe or the liquid preparation container 10. The inlet end of the second liquid inlet pipe 3 is connected to the second raw liquid tank 102. A second three-way valve 17 is installed on the second liquid inlet pipe 3, and the outlet of the second three-way valve 17 is connected to the waste discharge pipe or the liquid preparation container 10, thereby connecting the second liquid inlet pipe 3 to the waste discharge pipe or the liquid preparation container 10.

[0047] Specifically, the waste discharge pipeline can be connected to a waste liquid containing device, such as a waste liquid tank, to achieve temporary storage of the waste liquid. A first inlet pump 4 is installed on the first inlet pipeline 2, and a second inlet pump 5 is installed on the second inlet pipeline.

[0048] In this embodiment of the high-precision liquid preparation system, a first three-way valve 16 is installed on the first inlet pipe 2, and a second three-way valve 17 is installed on the second inlet pipe 3. When switching to a new mother liquor, the first three-way valve 16 is connected to the waste discharge pipe, and the second three-way valve 17 is connected to the waste discharge pipe. The new mother liquor pushes out the residual previous mother liquor in the first inlet pipe 2 or the second inlet pipe 3 and discharges the waste. After the previous mother liquor is discharged, the first three-way valve 16 or the second three-way valve 17 is switched to be connected to the liquid preparation container 10, and the new mother liquor is delivered to the liquid preparation container 10. With this setting, it can be ensured that each mother liquor can be delivered to the liquid preparation container 10 in an accurate amount for mixing, making the liquid preparation more accurate.

[0049] As an optional implementation, see Figure 1 and Figure 2 As shown, the waste discharge pipeline includes a first waste discharge branch 18, a second waste discharge branch 19, and a main waste discharge pipeline 20. The first waste discharge branch 18 is connected to one of the outlets of the first three-way valve 16, the second waste discharge branch 19 is connected to one of the outlets of the second three-way valve 17, and the main waste discharge pipeline 20 is connected to the first waste discharge branch 18 and the second waste discharge branch 19.

[0050] When the previous raw liquid in the first inlet pipe 2 needs to be drained, the outlet of the first three-way valve 16 is switched to connect with the first waste discharge branch 18, allowing the next raw liquid to enter the first inlet pipe 2, pushing out the previous raw liquid. The waste liquid flows from the first waste discharge branch 18 into the main waste discharge line 20. When the previous raw liquid in the second inlet pipe 3 needs to be drained, the outlet of the second three-way valve 17 is switched to connect with the second waste discharge branch 19, allowing the next raw liquid to enter the second inlet pipe 3, pushing out the previous raw liquid. The waste liquid flows from the second waste discharge branch 19 into the main waste discharge line 20.

[0051] The above structure ensures that each mother liquor is delivered to the mixing container 10 in an accurate amount for mixing, preventing the residual of the previous stock solution from affecting the mixing accuracy in the first inlet pipe 2 or the second inlet pipe 3, resulting in more precise mixing.

[0052] As an optional implementation, see Figure 2 As shown, a one-way valve 21 is installed on the waste discharge main line 20. The one-way valve 21 only allows the waste liquid in the first waste discharge branch line 18 and the second waste discharge branch line 19 to flow to the waste discharge main line 20.

[0053] The one-way valve 21 can prevent waste liquid from flowing back into the first inlet pipe 2 or the second inlet pipe 3, thus improving the accuracy of liquid preparation.

[0054] Similarly, when a prepared solution needs to be delivered to the storage container 100, after one solution has been delivered, it is necessary to switch to another solution for delivery. However, there is still the previous solution in the inlet pipe. When the new solution is delivered, the remaining previous solution in the inlet pipe will be delivered to the storage container 100 together. This will cause the solution in the storage container 100 to become less accurate and contaminate the solution.

[0055] For the above issues, please refer to Figure 1 and Figure 3 As shown, the liquid preparation device also includes a liquid outlet pipeline, a liquid storage container 100, and a waste liquid container 22. The liquid outlet pipeline is connected to the liquid preparation container 10. A third multi-channel switching valve 8 is installed on the liquid outlet pipeline. The outlet of the third multi-channel switching valve 8 is connected to the waste liquid container 22 and two or more liquid storage containers 100. The third multi-channel switching valve 8 is used to control the connection between the liquid outlet pipeline and the corresponding liquid storage container 100 or waste liquid container 22.

[0056] See Figure 1 and Figure 3 As shown, when it is necessary to drain the previous solution from the outlet pipeline, the third multi-channel switching valve 8 controls the outlet pipeline and the waste liquid container 22 to be connected. The solution in the dispensing container 10 flows from the outlet pipeline into the waste liquid container 22, pushing the remaining previous solution in the outlet pipeline into the waste liquid container 22.

[0057] See Figure 1 and Figure 3 As shown, the liquid outlet pipeline includes a main liquid outlet pipeline 91 and a branch liquid outlet pipeline 92, wherein:

[0058] The inlet of the third multi-channel switching valve 8 is connected to the main outlet pipeline 91, and the number of outlet branch pipelines 92 and the number of storage containers 100 are set in a one-to-one correspondence. The outlet of the third multi-channel switching valve 8 is connected to the corresponding storage container 100. The main outlet pipeline 91 is connected to the liquid preparation container 10. When one of the outlets of the third multi-channel switching valve 8 is connected to the storage container 100, the main outlet pipeline 91 is only connected to the corresponding storage container 100.

[0059] The solution in the dispensing container 10 flows into the waste liquid container 22 from the outlet pipe, pushing out the remaining solution in the outlet pipe into the waste liquid container 22. This method is mainly used to clean the previous solution in the main outlet pipe 91 and the outlet branch pipe 92.

[0060] See Figure 1 and Figure 3 As shown, the liquid preparation device also includes a bypass waste discharge branch 23, wherein: the inlet of the bypass waste discharge branch 23 is connected to the upstream side of the third multi-channel switching valve 8, and a bypass valve 24 is provided on the bypass waste discharge branch 23. The bypass valve 24 is used to control the connection or blockage between the bypass waste discharge branch 23 and the waste liquid container 22.

[0061] When the previous solution in the outlet pipeline needs to be drained and the bypass valve 24 is opened, the solution in the dispensing container 10 flows directly from the outlet pipeline through the bypass waste discharge branch 23 into the waste liquid container 22. This method is mainly used to clean the previous solution in the main outlet pipeline 91.

[0062] The third multi-channel switching valve 8 controls the connection between the liquid outlet pipeline and the waste liquid container 22. The solution in the liquid preparation container 10 flows into the waste liquid container 22 from the liquid outlet pipeline, pushing out the remaining solution in the liquid outlet pipeline into the waste liquid container 22.

[0063] As an optional implementation, there are two or more first raw material tanks 101, and a first multi-channel switching valve 6 is provided on the first liquid inlet pipe 2 to control the connection or disconnection of the corresponding first raw material tank 101 and the liquid preparation container 10; there are two or more second raw material tanks 102, and the liquid inlet end of the second liquid inlet pipe 3 is connected to two or more second raw material tanks 102, and a second multi-channel switching valve 7 is provided on the second liquid inlet pipe 3 to control the connection or disconnection of the corresponding second raw material tank 102 and the liquid preparation container 10.

[0064] The first multi-channel switching valve 6, the second multi-channel switching valve 7, and the third multi-channel switching valve 8 can be rotary switching valves as used in the prior art, or they can be combination switching valves, such as... Figure 1 In this example, the first multi-channel switching valve 6 is a rotary switching valve, and the second multi-channel switching valve 7 is a combination switch. Figure 1As shown, when the raw liquid in the corresponding first raw liquid tank 101 is needed to be input into the liquid preparation container 10, the first multi-channel switching valve 6 rotates the inlet to connect with its outlet, thereby enabling the selection of the raw liquid.

[0065] As an optional implementation, the inlet of the liquid outlet pipeline is connected to the outlet of the first multi-channel switching valve 6. Specifically, the inlet of the main liquid outlet pipeline 91 is connected to the outlet of the first multi-channel switching valve 6. The first multi-channel switching valve 6 enables the first liquid inlet pipeline 2 to be connected to the main liquid outlet pipeline 91, so that the solution in the liquid preparation container 10 flows into the corresponding liquid storage container 100 in sequence through the first liquid inlet pipeline 2, the main liquid outlet pipeline 91, and the liquid outlet branch pipeline 92.

[0066] When the prepared solution needs to be transported, the inlet and outlet of the first multi-channel switching valve 6 are connected to the first inlet pipe 2 (first inlet main pipe) and the outlet pipe, respectively. The prepared solution in the dispensing container 10 flows into the corresponding storage container 100 sequentially through the first inlet pipe 2 and the outlet pipe. When the prepared solution needs to be transported, the first inlet pipe 2, which originally transported the raw liquid in the first raw liquid tank 101, is now used to transport the prepared solution, simplifying the pipeline structure. Even when the dispensing container 10 needs to transport the prepared solution, only the first inlet main pipe and the second inlet main pipe are connected to it, making operation convenient.

[0067] See Figures 1-3 As shown, a pH meter 13 is installed on the solution preparation container 10 or the outlet pipe to detect the pH value of the solution in the solution preparation container 10; a conductivity meter 14 is installed on the solution preparation container 10 or the outlet pipe to detect the conductivity value of the solution in the solution preparation container 10. A filter 12 and a pressure gauge 11 are connected to the outlet pipe, wherein: the filter 12 is used to filter particulate matter in the liquid, and the inlet of the bypass waste discharge branch is connected to the outlet of the filter 12; the pressure gauge 11 is used to monitor the pressure in the outlet pipe to prevent excessive pressure caused by filter blockage, which could lead to pipe rupture.

[0068] Example 2:

[0069] This embodiment provides a high-precision liquid preparation device, including a device body, a first three-way valve 16 and a second three-way valve 17 disposed on the device body, wherein: the first three-way valve 16 is connected to the first liquid inlet pipe 2 between the first raw liquid tank 101 and the liquid preparation container 10, and the outlet of the first three-way valve 16 is connected to the waste discharge pipe 18 or the liquid preparation container 10, thereby connecting the first liquid inlet pipe to the waste discharge pipe or the liquid preparation container;

[0070] The second three-way valve 17 is connected to the second inlet pipeline between the second raw liquid tank and the liquid preparation container. The outlet of the second three-way valve is connected to the waste discharge pipeline or the liquid preparation container, thereby connecting the second inlet pipeline to the waste discharge pipeline 18 or the liquid preparation container 10.

[0071] Based on the above embodiments, 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, the first raw liquid tank 101, the liquid mixing 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. This embodiment only provides the equipment body equipped with the above-mentioned first multi-channel switching valve 6, second multi-channel switching valve 7, third multi-channel switching valve 8, first three-way valve 16, second three-way valve 17, corresponding pump body and pressure gauge, filter, pH meter, conductivity meter, and weighing device.

[0072] The specific features, structures, or characteristics described in this specification may be combined in any suitable manner in one or more embodiments or examples.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A high-precision liquid preparation device, characterized in that, Includes a main body of equipment, a first three-way valve and a second three-way valve disposed on the main body of equipment, wherein: The first three-way valve is connected to the first inlet pipeline between the first raw liquid tank and the liquid preparation container, and the outlet of the first three-way valve is connected to the waste discharge pipeline or the liquid preparation container, thereby connecting the first inlet pipeline to the waste discharge pipeline or the liquid preparation container. The second three-way valve is connected to the second inlet pipeline between the second raw liquid tank and the liquid preparation container. The outlet of the second three-way valve is connected to the waste discharge pipeline or the liquid preparation container, thereby connecting the second inlet pipeline to the waste discharge pipeline or the liquid preparation container.

2. The high-precision liquid preparation equipment according to claim 1, characterized in that, The main body of the equipment is also equipped with a first multi-channel switching valve and a second multi-channel switching valve, wherein: The first multi-channel switching valve has multiple inlet ends connected to multiple first raw material tanks through corresponding first branch pipelines, and the first multi-channel switching valve has an outlet end connected to a liquid preparation container through a first liquid inlet main. The first multi-channel switching valve is used to control the connection or blockage between the corresponding first branch pipeline and the first liquid inlet pipeline, thereby connecting or blocking the corresponding first raw material tank and the liquid preparation container. The multiple inlet ends of the second multi-channel switching valve are connected to the multiple second raw material tanks through the second branch pipelines, and the outlet end of the second multi-channel switching valve is connected to the liquid preparation container through the second liquid inlet main. The second multi-channel switching valve is used to control the connection or blockage between the corresponding second branch pipeline and the second liquid inlet pipeline, thereby connecting or blocking the corresponding second raw material tank and the liquid preparation container.

3. The high-precision liquid preparation equipment according to claim 1, characterized in that, The high-precision liquid preparation equipment also includes a third multi-channel switching valve located on the main body of the equipment, wherein: The inlet of the third multi-channel switching valve can be connected to the liquid preparation container through the liquid outlet main pipeline. One of the outlets of the third multi-channel switching valve is connected to the waste liquid container through a pipeline. The other outlets of the third multi-channel switching valve are connected to two or more liquid storage containers through corresponding liquid outlet branch pipelines. When the liquid preparation container is connected to the main liquid outlet pipeline, the third multi-channel switching valve is used to control whether the main liquid outlet pipeline is connected to or blocked from the waste liquid container or the corresponding liquid storage container.

4. The high-precision liquid preparation equipment according to claim 1, characterized in that, The liquid preparation equipment also includes a weighing device, which has a magnetic stirring part and is used to support the liquid preparation container.

5. The high-precision liquid preparation equipment according to claim 3, characterized in that, The main body of the equipment is also equipped with a first inlet pump, a second inlet pump, and an outlet pump, wherein: The first inlet pump is connected to the first inlet main line, the second inlet pump is connected to the second inlet main line, and the outlet pump is connected to the outlet main line.

6. The high-precision liquid preparation equipment according to claim 3, characterized in that, The main body of the equipment is equipped with a filter, a pressure gauge, a pH meter, and a conductivity meter connected to the main liquid outlet pipeline, wherein: The filter is used to filter particulate matter from the liquid; the pressure gauge is used to monitor the pressure in the main liquid outlet line. The pH meter is used to detect the pH value of the solution in the main outlet pipeline; The conductivity meter is used to detect the conductivity value of the solution in the main outlet pipeline.

7. A high-precision liquid preparation system, characterized in that, The system includes a first raw material tank, a second raw material tank, a first branch pipeline, a first inlet pipeline, a second inlet pipeline, a dispensing container, and the high-precision dispensing equipment as described in any one of claims 1-6, wherein: The inner diameter of the first liquid inlet pipe may be equal to or different from the inner diameter of the second liquid inlet pipe.

8. The high-precision liquid preparation system according to claim 7, characterized in that, The waste discharge pipeline includes a first waste discharge branch, a second waste discharge branch, and a main waste discharge pipeline, wherein: The first waste discharge branch is connected to one of the outlets of the first three-way valve, the second waste discharge branch is connected to one of the outlets of the second three-way valve, and the waste discharge main is connected to the first waste discharge branch and the second waste discharge branch.

9. The high-precision liquid preparation system according to claim 8, characterized in that, A one-way valve is installed on the waste discharge main line, which only allows waste liquid from the first waste discharge branch and the second waste discharge branch to flow into the waste discharge main line.

10. The high-precision liquid preparation system according to claim 7, characterized in that, The high-precision liquid preparation equipment also includes a third multi-channel switching valve located on the main body of the equipment, wherein: The inlet of the third multi-channel switching valve can be connected to the liquid preparation container through the liquid outlet main pipeline. One of the outlets of the third multi-channel switching valve is connected to the waste liquid container through a pipeline. The other outlets of the third multi-channel switching valve are connected to two or more liquid storage containers through corresponding liquid outlet branch pipelines. When the liquid preparation container is connected to the liquid outlet main pipeline, the third multi-channel switching valve is used to control the connection or blockage between the liquid outlet main pipeline and the waste liquid container or the corresponding liquid storage container. The liquid preparation system also includes a bypass waste discharge branch, wherein: the inlet of the bypass waste discharge branch is connected to the main outlet branch and is connected to the upstream side of the third multi-channel switching valve; a bypass valve is provided on the bypass waste discharge branch, and the bypass valve is used to control the connection or blockage between the bypass waste discharge branch and the waste liquid container.

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