Liquid mixing equipment

Abstract

The utility model provides liquid mixing equipment, which is used for mixing a stock solution and a solvent and then outputting the mixture, and comprises a solvent channel, a stock solution channel, a mixing module and a control module, the solvent channel is used for conveying a solvent and adjusting the flow of the solvent. The stock solution channel is used for conveying stock solution and adjusting the flow of the stock solution. The mixing module comprises a first mixing valve and a second mixing valve, the first mixing valve is used for controlling inlet and outlet of a solvent, the second mixing valve is used for controlling inlet and outlet of a stock solution, and the mixing module is used for mixing the solvent and the stock solution into a mixed solution and outputting the mixed solution. The control module is used for switching a circulating mode or a mixing mode according to the flow of the solvent and the flow of the stock solution. In the circulation mode, the first mixing valve and the second mixing valve are closed, the solvent circulates in the solvent channel, and the stock solution circulates in the stock solution channel; in the mixing mode, the first mixing valve and the second mixing valve are opened, and the solvent and the stock solution enter the mixing module to be mixed.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece processing, and in particular to a liquid mixing device. Background Art

[0002] An increasing number of workpieces require cutting fluids to cool and lubricate cutting tools during the cutting process. Currently, cutting fluids are still prepared manually. This involves pouring a fixed amount of solvent and stock solution into a container and then mixing them manually or by machine. Manual mixing is not only inefficient but also only allows for a single concentration of cutting fluid at a time. This inefficient method cannot meet the needs of various industries for quickly producing cutting fluids with varying concentrations. Utility Model Content

[0003] The present application provides a liquid mixing device for mixing a raw liquid and a solvent and then outputting the mixed liquid, comprising:

[0004] A mixing module, comprising a first mixing valve and a second mixing valve, wherein the first mixing valve is used to control the inlet and outlet of the solvent, and the second mixing valve is used to control the inlet and outlet of the stock solution, and the mixing module is used to mix the solvent and the stock solution into a mixed solution and output it;

[0005] a solvent channel, connected to the mixing module, for conveying the solvent and adjusting the flow rate of the solvent;

[0006] a raw liquid channel, connected to the mixing module, for conveying the raw liquid and adjusting the flow rate of the raw liquid; and

[0007] a control module, electrically connected to the first mixing valve and the second mixing valve, for switching between a circulation mode and a mixing mode according to the flow rate of the solvent and the flow rate of the stock solution;

[0008] In the circulation mode, the first mixing valve and the second mixing valve are closed, the solvent circulates in the solvent channel, and the stock liquid circulates in the stock liquid channel; in the mixing mode, the first mixing valve and the second mixing valve are opened, and the solvent and the stock liquid enter the mixing module for mixing.

[0009] The liquid mixing device provided in the embodiment of the present application can switch between a circulation mode and a mixing mode according to the flow rate of the solvent and the flow rate of the raw liquid by setting a control module; in the circulation mode, the first mixing valve and the second mixing valve are closed, and the solvent and the raw liquid circulate in the solvent channel and the raw liquid channel respectively; in the mixing mode, the first mixing valve and the second mixing valve are opened, and the solvent and the raw liquid enter the mixing module for mixing; it is beneficial to meet the requirements of producing mixed liquids of different concentrations and to improve production efficiency; by setting the mixing module to be connected with the solvent channel and the raw liquid channel, the solvent and the raw liquid can be more effectively mixed into a mixed liquid and then output, which is beneficial to improve the mixing efficiency, thereby improving production efficiency, reducing waste of human resources, and further reducing production costs.

[0010] In one embodiment, the solvent channel includes a solvent variable frequency pump, a first flow meter and a first circulation valve arranged in sequence; the solvent variable frequency pump is used to adjust the flow rate of the solvent and transport the solvent to the first flow meter, the first flow meter is used to monitor the flow rate of the solvent, and the first circulation valve is used to receive the solvent transported from the first flow meter, and adjust the flow direction of the solvent, and re-transport the solvent to the solvent variable frequency pump.

[0011] In one embodiment, the solvent variable frequency pump includes a first input end and a first output end, the first input end is used to receive the solvent, the first output end is used to deliver the solvent to the first flow meter, and the first circulation valve is connected to the first input end.

[0012] In one embodiment, the raw liquid channel includes a raw liquid variable frequency pump, a second flow meter and a second circulation valve arranged in sequence; the raw liquid variable frequency pump is used to adjust the flow rate of the raw liquid and transport the raw liquid to the second flow meter, the second flow meter is used to monitor the flow rate of the raw liquid, and the second circulation valve is used to receive the raw liquid transported from the second flow meter, and adjust the flow direction of the raw liquid, and re-transport the raw liquid to the raw liquid variable frequency pump.

[0013] In one embodiment, the raw liquid variable frequency pump includes a second input end and a second output end, the second input end is used to receive the raw liquid, the second output end is used to deliver the raw liquid to the second flow meter, and the second circulation valve is connected to the second input end.

[0014] In one embodiment, the liquid mixing device further includes a liquid storage module, which is used to accommodate the solvent and / or raw liquid. The liquid storage module is connected to the solvent variable frequency pump and / or the raw liquid variable frequency pump to transport the solvent and / or raw liquid.

[0015] In one embodiment, the mixing module further includes a flow mixing module, which is in communication with the first mixing valve and the second mixing valve, and is configured to receive and mix the solvent and the stock solution.

[0016] In one embodiment, the mixing flow module includes a merging pipe, a mixing flow input end, multiple mixing flow pipes and a mixing flow output end, at least some of the mixing flow pipes are connected end to end between the mixing flow input end and the mixing flow output end, the merging pipe is used to receive the solvent and the raw liquid transported from the solvent channel and the raw liquid channel, and the merging pipe is connected to the mixing flow input end.

[0017] In one embodiment, each of the mixing tubes includes a cylinder, a receiving cavity formed around the cylinder, and a mixing bracket arranged in the receiving cavity. The mixing tube is used to stir the mixed liquid to uniformly mix the solvent and the raw liquid. The shape of the mixing bracket is a double helix.

[0018] In one embodiment, the solvent channel further includes at least one first check valve, which is used to prevent the solvent from flowing reversely in the solvent channel; the raw liquid channel further includes at least one second check valve, which is used to prevent the raw liquid from flowing reversely in the raw liquid channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a liquid mixing device according to an embodiment of the present application.

[0020] Figure 2 This is a structural diagram of the liquid mixing device after removing part of the frame according to an embodiment of the present application.

[0021] Figure 3 This is a structural diagram of the liquid mixing device after removing the frame according to an embodiment of the present application.

[0022] Figure 4 This is a structural schematic diagram from another perspective of the liquid mixing device after the frame is removed according to one embodiment of the present application.

[0023] Figure 5 Schematic diagram of the structure of a mixing tube according to an embodiment of the present application.

[0024] Figure 6 This is a schematic diagram of the flow of solvent and raw liquid in a liquid mixing device according to an embodiment of the present application.

[0025] Description of main component symbols:

[0026] Liquid mixing equipment 100

[0027] Liquid storage module 1

[0028] Solvent channel 3

[0029] Solvent variable frequency pump 31

[0030] First input terminal 31a

[0031] First output terminal 31b

[0032] First flow meter 33

[0033] First circulation valve 35

[0034] First check valve 37

[0035] Stock solution channel 5

[0036] Raw liquid variable frequency pump 51

[0037] Second input terminal 51a

[0038] The second output terminal 51b

[0039] Second flow meter 53

[0040] Second circulation valve 55

[0041] Second check valve 57

[0042] Hybrid Module 6

[0043] First mixing valve 61

[0044] Second mixing valve 62

[0045] Mixing module 63

[0046] Merged tube 631

[0047] Mixed flow input terminal 633

[0048] Mixing tube 635

[0049] Cylinder 6351

[0050] Accommodation cavity 6353

[0051] Mixed flow bracket 6355

[0052] First mixing flow tube 635a

[0053] Second mixing tube 635b

[0054] The third mixing tube 635c

[0055] Fourth mixing tube 635d

[0056] Fifth mixing tube 635e

[0057] Sixth mixing tube 635f

[0058] Mixed flow output 637

[0059] Control module 7

[0060] Control Panel 70

[0061] Rack 8

[0062] Pipeline 9

[0063] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0065] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Concepts such as "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0066] In order to further illustrate the technical means and effects adopted by this application to achieve the intended purpose, the following detailed description of this application is made in conjunction with the accompanying drawings and preferred implementation methods.

[0067] Please also refer to Figure 1 and Figure 2 The liquid mixing device 100 of the embodiment of the present application is used to mix the raw liquid and the solvent and then output the mixed liquid. The liquid mixing device 100 includes a liquid storage module 1, a solvent channel 3, a raw liquid channel 5, a mixing module 6, a control module 7 and a frame 8.

[0068] In the present embodiment, the liquid storage module 1 is a water tank for containing a solvent. The liquid storage module 1 is arranged on the side of the solvent channel 3 away from the stock liquid channel 5, and is communicated with the solvent channel 3 to transport the solvent. In other embodiments, the liquid storage module 1 can be a liquid storage tank (not shown) for containing the stock liquid, and is communicated with the stock liquid channel 5 to transport the stock liquid, or the liquid storage module 1 can be a multi-chamber liquid storage tank for respectively accommodating the solvent and the stock liquid, and this application does not limit it. In the present embodiment, the shape of the liquid storage module 1 is a rectangular parallelepiped. In other embodiments, the shape of the liquid storage module 1 can also be a cylinder, a cube, a sphere or a cone, and this application does not limit it. In the present embodiment, the solvent is water and the stock liquid is a mixed oil. In other embodiments, the solvent can also be an organic solvent such as alcohol, acetone, methyl acetate or ethyl acetate, and the stock liquid can also be other substances that are easily soluble in the solvent, such as ammonia water or iodine water, and this application does not limit it.

[0069] Please also refer to Figure 2 、 Figure 3 and Figure 4 The solvent channel 3 is connected to the mixing module 6 and is used to transport the solvent and regulate the solvent flow rate. The solvent channel 3 includes a solvent variable frequency pump 31, a first flowmeter 33, and a first circulation valve 35, which are arranged in sequence along the solvent flow direction. The solvent variable frequency pump 31, the first flowmeter 33, and the first circulation valve 35 are connected by a pipe 9a. In this embodiment, the material of the pipe 9a is plastic; in other embodiments, the material of the pipe 9a can be any one of metal, glass, ceramic, and cement, and this application does not limit this. The solvent variable frequency pump 31 is used to regulate the solvent flow rate and transport the solvent to the first flowmeter 33. The solvent variable frequency pump 31 includes a first input end 31a and a first output end 31b. The first input end 31a is used to receive the solvent output from the liquid storage module 1, and the first output end 31b is used to transport the solvent to the first flowmeter 33. The first circulation valve 35 is connected to the first input end 31a. The solvent variable frequency pump 31 includes a variable frequency motor (not shown), which is electrically connected to the control module 7. The control module 7 controls the power of the variable frequency motor and thus the speed of the variable frequency motor, thereby achieving the purpose of regulating the flow of the solvent. By setting the solvent variable frequency pump 31, it is beneficial to automatically control the flow of the solvent and reduce labor costs.

[0070] The first flowmeter 33 is used to monitor the flow rate of the solvent. In this embodiment, the first flowmeter 33 is a turbine flowmeter, which uses a multi-blade rotor (not shown) to sense the flow rate of the solvent, thereby monitoring the flow rate of the solvent. In other embodiments, the first flowmeter 33 can also be any one of an impeller flowmeter, a differential pressure flowmeter, a rotor flowmeter, a throttling flowmeter, a slit flowmeter, a positive displacement flowmeter, an electromagnetic flowmeter, and an ultrasonic flowmeter, and this application is not limited thereto. The first circulation valve 35 is used to receive the solvent delivered from the first flowmeter 33 and adjust the flow direction of the solvent, thereby re-delivering the solvent to the solvent variable frequency pump 31. In this embodiment, the first circulation valve 35 is a pneumatic control valve, which uses compressed air to drive a pneumatic piston (not shown) to move, thereby changing the flow direction of the solvent. In other embodiments, the first circulation valve 35 can also be any one of an electric control valve, a hydraulic control valve, a diaphragm valve, and a ball valve, and this application is not limited thereto.

[0071] In this embodiment, the solvent channel 3 further includes two first check valves 37, which are disposed between the solvent variable frequency pump 31 and the first flowmeter 33, and between the solvent variable frequency pump 31 and the first circulation valve 35. The first check valves 37 are used to prevent reverse flow of the solvent within the solvent channel 3. In other embodiments, the solvent channel 3 may further include one or more first check valves 37, depending on the specific application requirements, and this application does not impose any limitation.

[0072] The raw liquid channel 5 is connected to the mixing module 6 and is used to transport the raw liquid and regulate its flow rate. The raw liquid channel 5 includes a raw liquid variable frequency pump 51, a second flowmeter 53, and a second circulation valve 55, arranged sequentially along the raw liquid flow direction. The raw liquid variable frequency pump 51, the second flowmeter 53, and the second circulation valve 55 are connected by a pipe 9b. In this embodiment, the pipe 9b is made of plastic; in other embodiments, the pipe 9b can be made of any of metal, glass, ceramic, and cement, and this application is not limited thereto. The raw liquid variable frequency pump 51 is used to regulate the flow rate of the raw liquid and transport it to the second flowmeter 53. The raw liquid variable frequency pump 51 includes a second input end 51a for receiving the raw liquid and a second output end 51b for transporting the raw liquid to the second flowmeter 53. The second circulation valve 55 is connected to the second input end 51a. The raw liquid variable frequency pump 51 includes a variable frequency motor (not shown), which is electrically connected to the control module 7. The control module 7 controls the power of the variable frequency motor and thus the speed of the variable frequency motor, thereby achieving the purpose of regulating the flow of the stock solution. By setting up the stock solution variable frequency pump 51, it is beneficial to automatically control the flow of the solvent and reduce labor costs.

[0073] The second flowmeter 53 is used to monitor the flow rate of the raw liquid. In this embodiment, the second flowmeter 53 is a turbine flowmeter, which uses a multi-blade rotor (not shown) to sense the flow rate of the raw liquid, thereby monitoring the flow rate of the raw liquid. In other embodiments, the second flowmeter 53 can also be any of an impeller flowmeter, a differential pressure flowmeter, a rotor flowmeter, a throttling flowmeter, a slit flowmeter, a positive displacement flowmeter, an electromagnetic flowmeter, and an ultrasonic flowmeter, without limitation in this application. The second circulation valve 55 is used to receive the raw liquid delivered from the second flowmeter 53, adjust the flow direction of the raw liquid, and re-deliver the raw liquid to the raw liquid variable frequency pump 51. In this embodiment, the second circulation valve 55 is a pneumatic control valve including a pneumatic piston (not shown). The second circulation valve 55 uses compressed air to propel the pneumatic piston, thereby changing the flow direction of the raw liquid. In other embodiments, the second circulation valve 55 can also be any of an electric control valve, a hydraulic control valve, a diaphragm valve, and a ball valve, without limitation in this application.

[0074] In this embodiment, the raw liquid channel 5 further includes two second check valves 57, which are disposed between the raw liquid variable frequency pump 51 and the second flowmeter 53, and between the raw liquid variable frequency pump 51 and the second circulation valve 55. The second check valves 57 are used to prevent the raw liquid from flowing backward within the raw liquid channel 5. In other embodiments, the raw liquid channel 5 may further include one or more second check valves 57, depending on the specific application requirements and is not limited in this application.

[0075] Please also refer to Figure 3 and Figure 4 , the mixing module 6 includes a first mixing valve 61, a second mixing valve 62 and a mixing module 63. The mixing module 6 is used to mix the solvent and the stock liquid into a mixed liquid and then output it. The first mixing valve 61 is connected to the solvent channel 3, and the first mixing valve 61 is used to control the inlet and outlet of the solvent. The second mixing valve 62 is connected to the stock liquid channel 5, and the second mixing valve 62 is used to control the inlet and outlet of the stock liquid. In this embodiment, the first mixing valve 61 and the second mixing valve 62 are both pneumatic regulating valves. The first mixing valve 61 and the second mixing valve 62 use compressed air to drive the pneumatic piston to move, thereby changing the flow direction of the solvent and the stock liquid, and then transferring the solvent and the stock liquid to the mixing module 63. In other embodiments, the first mixing valve 61 and the second mixing valve 62 can also be any one of an electric regulating valve, a hydraulic regulating valve, a diaphragm valve and a ball valve, and this application is not limited.

[0076] Please also refer to Figure 3 、 Figure 4 and Figure 5The mixing module 63 is used to receive the solvent and the raw liquid and mix the solvent and the raw liquid into a mixed liquid before outputting it. The mixing module 63 includes a merging pipe 631, a mixed flow input end 633, multiple mixing pipes 635 and a mixed flow output end 637. The merging pipe 631 is connected to the first mixing valve 61 and the second mixing valve 62 through the pipeline 9c. The merging pipe 631 is used to receive the solvent and raw liquid transported from the solvent channel 3 and the raw liquid channel 5. The merging pipe 631 is connected to the mixed flow input end 633, and the solvent and raw liquid enter the mixing pipe 635 through the mixed flow input end 633. Each mixing pipe 635 includes a barrel 6351, a accommodating chamber 6353 formed around the barrel 6351, and a mixing support 6355 arranged in the accommodating chamber 6353. The mixing pipe 635 is used to stir the mixed liquid so that the solvent and raw liquid are evenly mixed. In this embodiment, the shape of the mixing support 6355 is a double helix. In other embodiments, the shape of the mixed flow bracket 6355 can also be any one of a rectangle, a triangle, a circle, and an irregular polygon.

[0077] Please also refer to Figure 3 and Figure 6 In this embodiment, the flow mixing module 63 includes six mixing tubes 635 arranged in parallel, namely a first mixing tube 635a, a second mixing tube 635b, a third mixing tube 635c, a fourth mixing tube 635d, a fifth mixing tube 635e, and a sixth mixing tube 635f. In other embodiments, the flow mixing module 63 may also include two, three, or more mixing tubes 635, which is not limited in this application. Specifically, the solvent and the raw liquid can enter the merging pipe 631 through the first mixing valve 61 and the second mixing valve 62, respectively, and then enter the first mixing pipe 635a and the second mixing pipe 635b from the mixed flow input end 633 through the merging pipe 631. The second mixing pipe 635b and the third mixing pipe 635c are connected end to end between the mixed flow input end 633 and the mixed flow output end 637. The solvent and the raw liquid enter the third mixing pipe 635c and the fourth mixing pipe 635d through the second mixing pipe 635b. The fourth mixing pipe 635d and the fifth mixing pipe 635e are connected end to end between the mixed flow input end 633 and the mixed flow output end 637. The solvent and the raw liquid enter the fifth mixing pipe 635e and the sixth mixing pipe 635f through the fourth mixing pipe 635d. The solvent and the raw liquid are evenly mixed in the mixing pipe 635, and then transferred to the mixed flow output end 637 by the sixth mixing pipe 635 for output. The provision of multiple mixing tubes 635 facilitates uniform mixing of the solvent and the stock solution into a mixed solution, thereby improving mixing efficiency.

[0078] The control module 7 includes a control panel 70. The control panel 70 is arranged on a side surface of the frame 8. The liquid storage module 1, the solvent channel 3, the raw liquid channel 5, the mixing module 6 and the control module 7 are arranged in the frame 8. The control panel 70 is electrically connected to the control chip (not shown) in the control module 7, and the control panel 70 is used for the user to input the concentration of the mixed liquid. The control module 7 is used to calculate the first flow setting value and the second flow setting value according to the concentration of the mixed liquid input by the user; or the control module 7 is used to receive the first flow setting value and the second flow setting value input by the user. The control module 7 controls the solvent channel 3 and the raw liquid channel 5 so that the solvent channel 3 adjusts the flow of the solvent to the first flow setting value and the raw liquid channel 5 adjusts the flow of the raw liquid to the second flow setting value; or the control module 7 adjusts the flow of the solvent to the first flow setting value and the raw liquid channel 5 adjusts the flow of the raw liquid to the second flow setting value according to the first flow setting value and the second flow setting value input by the user.

[0079] The control module 7 is also electrically connected to the first mixing valve 61 and the second mixing valve 62, and is used to switch between circulation mode and mixing mode based on the monitoring signals of the first flowmeter 33 and the second flowmeter 53, that is, to switch between circulation mode and mixing mode based on the flow rates of the solvent and the raw liquid. Specifically, the control module 7 is used to determine whether the flow rate of the solvent has reached the first flow rate setting value and whether the flow rate of the raw liquid has reached the second flow rate setting value. If the flow rate of the solvent has not reached the first flow rate setting value and the flow rate of the raw liquid has not reached the second flow rate setting value, the control module 7 is in circulation mode, the first mixing valve 61 and the second mixing valve 62 are closed, the solvent circulates in the solvent channel 3, and the raw liquid circulates in the raw liquid channel 5. The control module 7 continues to control the frequency of the solvent variable frequency pump 31 and the frequency of the raw liquid variable frequency pump 51. If the flow rate of the solvent has reached the first flow rate setting value and the flow rate of the raw liquid has reached the second flow rate setting value, the control module 7 switches to mixing mode, the first mixing valve 61 and the second mixing valve 62 are opened, and the solvent and raw liquid enter the mixing module 6 for mixing. The control module 7 can be any one of a controller including an RS485 interface, a central processing unit (CPU) and a single-chip microcomputer (such as an STM32 single-chip microcomputer, a 51 single-chip microcomputer, a TMS single-chip microcomputer, a PIC single-chip microcomputer or an AVR single-chip microcomputer), and this application does not limit it.

[0080] The specific process for mixing a raw liquid and a solvent and then discharging the resulting mixture using the liquid mixing device 100 is as follows: The user enters the desired concentration of the mixed liquid through the control panel 70. The control module 7 calculates a first flow rate setting value and a second flow rate setting value based on the user-entered concentration of the mixed liquid. The solvent is delivered from the liquid storage module 1 to the first input port 31a of the solvent variable frequency pump 31. The solvent then passes through the solvent variable frequency pump 31, the first flowmeter 33, and the first circulation valve 35 in the solvent channel 3, and is then re-delivered from the first circulation valve 35 to the solvent variable frequency pump 31. The control module 7 controls the solvent variable frequency pump 31 in the solvent channel 3 to adjust the flow rate of the solvent in the solvent channel 3 to the first flow rate setting value. The raw liquid is delivered from the second input port 51a to the raw liquid variable frequency pump 51. The raw liquid then passes through the raw liquid variable frequency pump 51, the second flowmeter 53, and the second circulation valve 55 in the raw liquid channel 5, and is then re-delivered from the second circulation valve 55 to the raw liquid variable frequency pump 51. The control module 7 controls the raw liquid frequency conversion pump 51 of the raw liquid channel 5 so that the raw liquid channel 5 adjusts the flow rate of the raw liquid to the second flow rate setting value. The control module 7 is used to determine whether the flow rate of the solvent has reached the first flow rate setting value and whether the flow rate of the raw liquid has reached the second flow rate setting value based on the monitoring signal of the first flow meter 33 and the monitoring signal of the second flow meter 53. If the flow rate of the solvent has reached the first flow rate setting value and the flow rate of the raw liquid has reached the second flow rate setting value, the mixing mode is switched to, the first mixing valve 61 and the second mixing valve 62 are closed, and the first mixing valve 61 and the second mixing valve 62 are opened to transport the solvent and the raw liquid to the mixing module 63. The mixing module 63 is used to receive and mix the solvent and the raw liquid, and output the mixed liquid after mixing the solvent and the raw liquid into a mixed liquid. If the flow rate of the solvent does not reach the first flow rate setting value and the flow rate of the raw liquid does not reach the second flow rate setting value, the circulation mode is still maintained, the first mixing valve 61 and the second mixing valve 62 are closed, and the control module 7 continues to regulate the frequency of the solvent variable frequency pump 31 and the frequency of the raw liquid variable frequency pump 51 until the flow rates of the solvent and the raw liquid reach the required first flow rate setting value and the second flow rate setting value respectively.

[0081] The liquid mixing device 100 provided in the embodiment of the present application can switch between a circulation mode and a mixing mode according to the flow rate of the solvent and the flow rate of the raw liquid by setting a control module 7; in the circulation mode, the first mixing valve 61 and the second mixing valve 62 are closed, and the solvent and the raw liquid circulate in the solvent channel 3 and the raw liquid channel 5 respectively; in the mixing mode, the first mixing valve 61 and the second mixing valve 62 are opened, and the solvent and the raw liquid enter the mixing module 6 for mixing; this is conducive to meeting the requirements of producing mixed liquids of different concentrations and is conducive to improving production efficiency; by setting the mixing module 6 to be connected with the solvent channel 3 and the raw liquid channel 5, the solvent and the raw liquid can be more effectively mixed into a mixed liquid and then output, which is conducive to improving the mixing efficiency, thereby helping to improve production efficiency, reduce waste of human resources, and thus help to reduce production costs.

[0082] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application should not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A liquid mixing device for mixing a raw liquid and a solvent and then outputting the mixed liquid, characterized in that: include: A mixing module, comprising a first mixing valve and a second mixing valve, wherein the first mixing valve is used to control the inlet and outlet of the solvent, and the second mixing valve is used to control the inlet and outlet of the stock solution, and the mixing module is used to mix the solvent and the stock solution into a mixed solution and output it; a solvent channel, connected to the mixing module, for conveying the solvent and adjusting the flow rate of the solvent; a stock liquid channel, connected to the mixing module, for conveying the stock liquid and adjusting the flow rate of the stock liquid; as well as a control module, electrically connected to the first mixing valve and the second mixing valve, for switching between a circulation mode and a mixing mode according to the flow rate of the solvent and the flow rate of the stock solution; In the circulation mode, the first mixing valve and the second mixing valve are closed, the solvent circulates in the solvent channel, and the stock liquid circulates in the stock liquid channel; in the mixing mode, the first mixing valve and the second mixing valve are opened, and the solvent and the stock liquid enter the mixing module for mixing.

2. The liquid mixing device according to claim 1, characterized in that: The solvent channel includes a solvent variable frequency pump, a first flow meter and a first circulation valve arranged in sequence; the solvent variable frequency pump is used to adjust the flow rate of the solvent and transport the solvent to the first flow meter, the first flow meter is used to monitor the flow rate of the solvent, and the first circulation valve is used to receive the solvent transported from the first flow meter, adjust the flow direction of the solvent, and re-transport the solvent to the solvent variable frequency pump.

3. The liquid mixing device according to claim 2, characterized in that: The solvent variable frequency pump includes a first input end and a first output end, the first input end is used to receive the solvent, the first output end is used to deliver the solvent to the first flow meter, and the first circulation valve is connected to the first input end.

4. The liquid mixing device according to claim 1, characterized in that The raw liquid channel includes a raw liquid frequency conversion pump, a second flow meter and a second circulation valve arranged in sequence; the raw liquid frequency conversion pump is used to adjust the flow rate of the raw liquid and transport the raw liquid to the second flow meter, the second flow meter is used to monitor the flow rate of the raw liquid, and the second circulation valve is used to receive the raw liquid transported from the second flow meter, and adjust the flow direction of the raw liquid, and re-transport the raw liquid to the raw liquid frequency conversion pump.

5. The liquid mixing device according to claim 4, characterized in that: The raw liquid variable frequency pump includes a second input end and a second output end, the second input end is used to receive the raw liquid, the second output end is used to deliver the raw liquid to the second flow meter, and the second circulation valve is connected to the second input end.

6. The liquid mixing device according to claim 1, characterized in that: The liquid mixing device further comprises a liquid storage module, and the liquid storage module is used to contain the solvent and / or stock solution.

7. The liquid mixing device according to claim 1, characterized in that: The mixing module further includes a flow mixing module, which is in communication with the first mixing valve and the second mixing valve, and is configured to receive and mix the solvent and the raw liquid.

8. The liquid mixing device according to claim 7, characterized in that: The mixing flow module includes a merging pipe, a mixing flow input end, multiple mixing flow pipes and a mixing flow output end. The merging pipe is connected to the mixing flow input end. The merging pipe is used to receive the solvent and the raw liquid transported from the solvent channel and the raw liquid channel. At least part of the mixing flow pipes are connected end to end between the mixing flow input end and the mixing flow output end.

9. The liquid mixing device according to claim 8, characterized in that: Each of the mixing tubes includes a cylinder, a receiving cavity formed by the cylinder, and a mixing bracket arranged in the receiving cavity. The mixing tube is used to stir the mixed liquid to uniformly mix the solvent and the raw liquid. The mixing bracket is in the shape of a double helix.

10. The liquid mixing device according to claim 1, characterized in that: The solvent channel also includes at least one first check valve, which is used to prevent the solvent from flowing reversely in the solvent channel; the raw liquid channel also includes at least one second check valve, which is used to prevent the raw liquid from flowing reversely in the raw liquid channel.

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