High-precision material liquid conveying system and high-precision material liquid batching system

Abstract

The embodiment of the present application provides a high-precision material liquid conveying system and a high-precision material liquid batching system. The high-precision material liquid conveying system comprises a storage tank, a first material conveying pipe, a buffer exhaust hopper, a material conveying pipe assembly, a flow meter and a centrifugal pump. The storage tank, the first material conveying pipe, the buffer exhaust hopper and the material conveying pipe assembly are sequentially communicated in the direction of material liquid flow, and a material outlet of the material conveying pipe assembly can be communicated with a stirring tank. The flow meter and the centrifugal pump are both arranged on the material conveying pipe assembly. Therefore, the high-precision material liquid conveying system of the embodiment of the present application has the advantage of high batching accuracy.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a high-precision liquid conveying system and a dispensing system having the conveying system. Background Technology

[0002] Currently, the homogenization process for positive and negative electrodes in the market requires the addition of a large amount of solvent. In related technologies, the conveying system mainly uses a centrifugal pump to transport the liquid from the storage tank to the mixing tank. The flow rate of the liquid is measured by a flow meter installed at the downstream end of the centrifugal pump. However, when the liquid level in the storage tank is low, air from the storage tank will be introduced into the centrifugal pump along with the liquid. The liquid mixed with air not only reduces the conveying capacity of the centrifugal pump, but also causes the mass flow meter to malfunction due to air contamination, resulting in a discrepancy between the batching and the actual demand. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a high-precision liquid conveying system. This conveying system has the advantages of high dispensing accuracy and high conveying capacity stability.

[0004] Embodiments of the present invention also propose a high-precision liquid dispensing system.

[0005] The high-precision liquid conveying system of this invention includes a storage tank, a first conveying pipe, a buffer exhaust hopper, a conveying pipe assembly, a flow meter, and a centrifugal pump.

[0006] The storage tank, the first conveying pipe, the buffer vent, and the conveying pipe assembly are connected sequentially in the direction of liquid flow, and the discharge port of the conveying pipe assembly can be connected to the mixing tank. The flow meter and the centrifugal pump are both installed on the conveying pipe assembly.

[0007] The high-precision liquid conveying system of this invention, by setting a buffer venting hopper between the storage tank and the conveying pipe assembly, allows the liquid to form a vortex at the bottom outlet of the storage tank when the liquid level is low, bringing in a large number of air bubbles into the buffer venting hopper. The liquid is first allowed to flow into the buffer venting hopper for flow stabilization, and the air mixed in the liquid is discharged within the buffer venting hopper, thereby eliminating its impact on the centrifugal pump's conveying capacity. This ensures a stable flow of liquid through the flow meter, allowing the flow meter to count the actual liquid flow. This provides advantages in improving the centrifugal pump's conveying capacity and the accuracy of batching.

[0008] Therefore, the high-precision liquid conveying system of this invention has the advantages of high conveying capacity and high batching accuracy.

[0009] In some embodiments, the buffer vent includes a conical hopper and a first vent valve. The feed inlet of the conical hopper is connected to the discharge outlet of the first feed pipe, and the discharge outlet of the conical hopper is connected to the feed inlet of the feed pipe assembly. The area near the top of the conical hopper has a buffer vent, and the first vent valve is disposed on the buffer vent.

[0010] In some embodiments, the high-precision liquid conveying system further includes a drain assembly, wherein the lower end of the buffer exhaust hopper has a drain port, and the drain assembly is connected to the drain port of the conveying pipe assembly.

[0011] In some embodiments, a first control valve is provided on the first conveying pipe.

[0012] In some embodiments, a first weighing module is further included, which is disposed on the storage tank.

[0013] In some embodiments, the first control valve includes a first manual ball valve and a first pneumatic ball valve, which are sequentially arranged on the first conveying pipe in accordance with the direction of liquid flow.

[0014] In some embodiments, the feed pipe assembly includes a main pipe section, a lifting pipe section, and an inlet section that are connected sequentially in the direction of liquid flow. The inlet of the main pipe section is connected to the outlet of the buffer exhaust hopper, and the outlet of the inlet section is connected to the mixing tank. The flow meter and the centrifugal pump are both mounted on the lifting pipe section.

[0015] In some embodiments, the high-precision liquid conveying system further includes a second control valve, and the upper end of the lifting pipe section is provided with a lifting vent port, and the second control valve is disposed on the lifting vent port.

[0016] In some embodiments, the lifting pipe section includes a connecting section connected sequentially in the direction of liquid flow and a lifting section extending in the vertical direction. The lifting vent is located at the upper end of the lifting section. The inlet of the connecting section is connected to the outlet of the main pipe section. The flow meter is located on the lifting section, and the centrifugal pump is located on the connecting section.

[0017] In some embodiments, the feed pipe assembly further includes a reflux pipe section and a second control valve. The feed lifting pipe section has a first discharge port and a second discharge port. The first discharge port is connected to the inlet of the feed tank section, and the second discharge port is connected to the inlet of the reflux pipe section. The discharge port of the reflux pipe section is connected to the inlet of the feed lifting pipe section. The centrifugal pump is disposed on the feed lifting pipe section. The reflux pipe section and the feed lifting pipe section can form a circulation loop. The second control valve is disposed on the feed lifting section near the second discharge port to control the connection of the circulation loop.

[0018] In some embodiments, the second control valve includes a back pressure valve and a second manual ball valve arranged sequentially in the direction of liquid flow.

[0019] In some embodiments, the feed pipe assembly further includes a pressure gauge disposed on the feed pipe section.

[0020] In some embodiments, the feed pipe assembly further includes a pressure transmitter disposed in the feed pipe section and between the flow meter and the centrifugal pump.

[0021] In some embodiments, the feed section is inclined relative to the horizontal direction, and the feed inlet of the feed section is higher than the discharge outlet of the feed section.

[0022] The high-precision liquid dispensing system of this invention embodiment may include a mixing tank and a high-precision liquid conveying system as described in any one of the above-mentioned methods, wherein the discharge port of the conveying pipe assembly is connected to the inlet of the mixing tank.

[0023] In some embodiments, the feed pipe assembly includes a feed tank section, and there are multiple mixing tanks arranged sequentially along the extension direction of the feed tank section. The feed tank section has multiple discharge ports, and the multiple discharge ports of the feed tank section are connected to the multiple mixing tanks one by one.

[0024] In some embodiments, the high-precision liquid delivery system has multiple systems, and the multiple high-precision liquid delivery systems are connected to the same mixing tank. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the high-precision liquid dispensing system according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the structure of a high-precision liquid conveying system according to an embodiment of the present invention.

[0027] Figure label:

[0028] Ingredient dispensing system 1000;

[0029] Conveying system 100; Mixing tank 200;

[0030] Storage tank 1;

[0031] First conveying pipe 2;

[0032] Buffer exhaust hopper 3; conical hopper 31; first exhaust valve 32;

[0033] Material conveying pipe assembly 4; main pipe section 41; lifting pipe section 42; connecting section 421; lifting section 422; lifting vent 423;

[0034] Material inlet section 43;

[0035] Return pipe section 44;

[0036] Pressure gauge 45;

[0037] Pressure transmitter 46;

[0038] Flow meter 5;

[0039] Centrifugal pump 6;

[0040] Sewage discharge component 7;

[0041] First weighing module 81; Second weighing module 82;

[0042] First control valve 91; First manual ball valve 911; First pneumatic ball valve 912;

[0043] Second control valve 92; back pressure valve 921; second manual ball valve 922;

[0044] Third control valve 93;

[0045] Fourth control valve 94;

[0046] Check valve 95. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] The following is for reference. Figures 1-2 The present invention describes a high-precision liquid conveying system 100 and a high-precision liquid dispensing system 1000 according to embodiments of the present invention.

[0049] The high-precision liquid conveying system 100 of this invention includes a storage tank 1, a first conveying pipe 2, a buffer exhaust hopper 3, a conveying pipe assembly 4, a flow meter 5, and a centrifugal pump 6.

[0050] Storage tank 1, first conveying pipe 2, buffer venting hopper 3, and conveying pipe assembly 4 are connected sequentially according to the direction of liquid flow. The discharge port of conveying pipe assembly 4 can be connected to mixing tank 200. Flow meter 5 and centrifugal pump 6 are both installed on conveying pipe assembly 4.

[0051] The high-precision liquid conveying system 100 of this invention, by setting a buffer venting hopper 3 between the storage tank 1 and the conveying pipe assembly 4, allows the liquid to form a vortex at the bottom outlet of the storage tank 1 when the liquid level is low, bringing in a large number of air bubbles into the buffer venting hopper 3. The liquid is first allowed to flow into the buffer venting hopper 3 for flow stabilization, and the air mixed in the liquid is discharged within the buffer venting hopper 3, thereby eliminating its influence on the conveying capacity of the centrifugal pump 6. This allows the liquid to flow stably through the flow meter 5, ensuring that the flow meter 5 counts the actual liquid flow rate. This provides advantages in improving the centrifugal pump's conveying capacity and the accuracy of dispensing.

[0052] Therefore, the high-precision liquid conveying system 100 of this embodiment of the invention has the advantages of high conveying capacity and high batching accuracy.

[0053] Optionally, the high-precision feed solution can be deionized water and / or NMP solution.

[0054] Specifically, the discharge port of the storage tank 1 is connected to the inlet of the first conveying pipe 2, the discharge port of the first conveying pipe 2 is connected to the inlet of the buffer exhaust hopper 3, the discharge port of the buffer exhaust hopper 3 is connected to the inlet of the conveying pipe assembly 4, and the inlet of the conveying pipe assembly 4 is connected to the inlet of the mixing tank 200.

[0055] like Figure 1 and Figure 2 As shown, the buffer vent 3 includes a conical hopper 31 and a first vent valve 32. The feed inlet of the conical hopper 31 is connected to the discharge outlet of the first conveying pipe 2, and the discharge outlet of the conical hopper 31 is connected to the feed inlet of the conveying pipe assembly 4. The area near the top of the conical hopper 31 has a buffer hopper vent, and the first vent valve 32 is disposed on the buffer hopper vent.

[0056] The high-precision liquid conveying system 100 of this invention features a buffer vent in the upper region of the conical hopper 31, which allows for the removal of air mixed into the conical hopper 31 as much as possible without affecting its volume. Furthermore, the conical shape of the buffer vent hopper 3 facilitates the emptying of the liquid, reducing waste. Additionally, a first vent valve 32 is provided on the buffer vent, allowing for selective opening or closing of the vent based on the air pressure within it.

[0057] like Figure 1 and Figure 2As shown, the high-precision liquid conveying system 100 also includes a drain component 7, and the lower end of the buffer exhaust hopper 3 has a drain port. The drain component 7 is connected to the drain port of the conveying pipe component 4.

[0058] The high-precision liquid conveying system 100 of this invention provides a drain port at the lower end of the buffer vent 3 and connects the drain assembly 7 to the drain port. This allows for the removal of residual liquid in the buffer vent 3 after continuous use, facilitating subsequent cleaning processes.

[0059] Optionally, the sewage discharge assembly 7 includes a sewage discharge valve and a sewage collection tank, the sewage collection tank being connected to the sewage discharge port of the buffer hopper exhaust port.

[0060] like Figure 1 and Figure 2 As shown, a first control valve 91 is installed on the first feed pipe 2. This allows for timely prevention of liquid from entering the buffer vent 3 in case of a malfunction. Therefore, it offers the advantage of high ease of operation.

[0061] Optionally, the first control valve 91 includes a first manual ball valve 911 and a first pneumatic ball valve 912, which are sequentially arranged on the first conveying pipe 2 according to the direction of liquid flow. It is understood that the connection of the first conveying pipe 2 can be controlled by the first pneumatic ball valve 912 based on the pressure inside the first conveying pipe 2. Alternatively, the opening and closing of the first conveying pipe 2 can be manually controlled by the first manual ball valve 911. During the liquid conveying process, the first manual ball valve 911 is normally open, and the first pneumatic ball valve 912 opens and closes according to the pressure in the first conveying pipe 2.

[0062] The high-precision liquid conveying system 100 of this invention can control the connection of the first conveying pipe 2 via the first pneumatic ball valve 912 according to the pressure inside the first conveying pipe 2, offering advantages in terms of operational safety and convenience. Furthermore, the first manual ball valve 911 and the first pneumatic ball valve 912 are sequentially arranged according to the liquid flow direction. Therefore, if the first pneumatic ball valve 912 malfunctions, the liquid flow into the first pneumatic ball valve 912 can be prevented by closing the first manual ball valve 911, thus allowing for replacement of the faulty first pneumatic ball valve 912. This provides the advantage of high ease of replacement.

[0063] The high-precision liquid conveying system 100 also includes a first weighing module 81, which is mounted on the storage tank 1. Therefore, the level of the liquid in the storage tank 1 can be determined by using the first weighing module 81 to feed the liquid into the storage tank 1. Furthermore, the accuracy of the batching system 1000 can be verified using the first weighing module 81, which helps to further improve the precision of batching.

[0064] like Figure 1 and Figure 2 As shown, the conveying pipe assembly 4 includes a main pipe section 41, a lifting pipe section 42, and an inlet section 43 connected sequentially in the direction of liquid flow. The inlet of the main pipe section 41 is connected to the outlet of the buffer exhaust hopper 3, and the outlet of the inlet section 43 can be connected to the mixing tank 200. The flow meter 5 and the centrifugal pump 6 are both installed on the lifting pipe section 42.

[0065] The high-precision liquid conveying system 100 of this invention divides the conveying pipe assembly 4 into a main pipe section 41, a lifting pipe section 42, and a tank inlet section 43, which are connected sequentially in the direction of liquid flow. The lifting pipe section 42 lifts the material so that the liquid flows into the mixing tank 200. Therefore, it has the advantages of simple pipe section design and convenient feeding.

[0066] Optionally, a third control valve 93 may be provided on the material lifting pipe section 42. Specifically, the third control valve 93 may be multiple manual ball valves.

[0067] like Figure 1 and Figure 2 As shown, the high-precision liquid conveying system 100 of this embodiment of the invention also includes a second control valve 92. The upper end of the lifting pipe section 42 is provided with a lifting exhaust port 423, and the second control valve 92 is disposed on the lifting exhaust port 423.

[0068] The high-precision liquid conveying system 100 of this invention has a lifting vent 423 at the upper end of the lifting pipe section 42, which can further discharge air mixed in with the liquid during the conveying process. This further increases the speed at which the liquid flows through the flow meter 5. Consequently, the accuracy of the flow meter 5's counting is further improved, which is beneficial for improving the accuracy of batching.

[0069] like Figure 1 and Figure 2 As shown, the lifting pipe section includes a connecting section 421 connected sequentially in the direction of liquid flow and a lifting section 422 extending vertically. A lifting vent 423 is located at the upper end of the lifting section 422. The inlet of the connecting section 421 is connected to the outlet of the main pipe section 41. A flow meter 5 is installed on the lifting section 422, and a centrifugal pump 6 is installed on the connecting section 421. Therefore, it has the advantage of a simple structure.

[0070] like Figure 1 and Figure 2As shown, the conveying pipe assembly 4 also includes a return pipe section 44 and a second control valve 92. The lifting pipe section 42 has a first discharge port and a second discharge port. The first discharge port is connected to the inlet of the feed tank section 43, and the second discharge port is connected to the inlet of the return pipe section 44. The discharge port of the return pipe section 44 is connected to the inlet of the lifting pipe section 42. The centrifugal pump 6 is installed on the lifting pipe section 42. The return pipe section 44 and the lifting pipe section 42 can form a circulation loop. The second control valve 92 is installed on the lifting section 422 near the second discharge port to control the connection of the circulation loop.

[0071] The high-precision liquid conveying system 100 of this invention, through the provided reflux pipe section 44, can form a circulation loop with the lifting pipe section 42 before the conveying system 100 is turned on for batching. During the circulation process, the air remaining in the conveying pipe assembly 4 is expelled through the lifting exhaust port 423. After multiple circulations, the flow rate of the liquid tends to stabilize, and then the flow meter 5 is used for batching and counting. Thus, it has the advantage of further improving the accuracy of batching.

[0072] Optionally, a check valve 95 is also provided on the return pipe section 44.

[0073] Specifically, the main pipe section 41 is connected to the return pipe section 44 and the lifting pipe section 42 via a three-way valve. The connection of this circulation loop can be controlled by opening and closing the second control valve 92. Optionally, the second control valve 92 includes a second manual ball valve 922 and a back pressure valve 921, which are sequentially arranged on the lifting section 422 according to the direction of material flow.

[0074] like Figure 1 and Figure 2 As shown, the high-precision liquid conveying system 100 of this embodiment of the invention also includes a pressure gauge 45, which is installed on the lifting pipe section 42.

[0075] The high-precision liquid conveying system 100 of this invention uses a pressure gauge 45 to determine whether the conveying system 100 is operating normally, so as to prevent the conveying system 100 from being blocked in time.

[0076] Optionally, pressure gauge 45 can be a visual pressure gauge 45.

[0077] like Figure 1 and Figure 2 As shown, the high-precision liquid conveying system 100 of this embodiment of the invention also includes a pressure transmitter 46, which is disposed in the feed pipe section 42 and between the flow meter 5 and the centrifugal pump 6. Therefore, the pressure within the feed pipe section 42 can be monitored to reflect the stable operation of the conveying system 100.

[0078] like Figure 1 and Figure 2 As shown, the material inlet section 43 is inclined relative to the horizontal direction, and the inlet of the material inlet section 43 is higher than the outlet of the material inlet section 43.

[0079] The high-precision liquid conveying system 100 of this invention, by tilting the inlet section 43 relative to the horizontal direction, allows the liquid entering the inlet section 43 to flow into the mixing tank 200 under its own gravity, eliminating the need for an additional pump. Simultaneously, it allows the liquid counted by the flow meter 5 to flow into the mixing tank 200, preventing liquid accumulation in the inlet section 43 from affecting the accuracy of the batching. Therefore, it has the advantage of further improving the accuracy of batching.

[0080] Optionally, the inlet section 43 has an inclination angle of 3° to 5° relative to the horizontal direction. This avoids the problem of excessive height difference between the front and rear ends of the inlet section 43 due to an excessive inclination angle, which would result in high construction costs for the conveying system 100, while also avoiding the problem of poor gravity flow due to an excessively small inclination angle.

[0081] The specific conveying process is as follows: the first manual ball valve 911 below the storage tank 1 containing the liquid is in the normally open state, the first pneumatic ball valve 912 is opened, and simultaneously, the centrifugal pump 6 is turned on, allowing the liquid to flow into the buffer exhaust hopper 3. When the liquid level in the storage tank 1 is low, the liquid forms a vortex at the bottom outlet of the storage tank 1, carrying a large number of air bubbles into the buffer exhaust hopper 3. At this time, the air brought in from the storage tank 1 is stabilized by the buffer exhaust hopper 3 and released from the first exhaust valve 32. The liquid flowing to the centrifugal pump 6 through the front main pipe section 41 does not contain air bubbles, thus eliminating its impact on the conveying capacity of the centrifugal pump 6 and ensuring that the low liquid level inside the storage tank 1 can be emptied and utilized. The liquid continues to be conveyed to the rear end through the centrifugal pump 6, and simultaneously, the flow meter 5 (mass flow meter 5) is turned on, with the manual ball valves before and after the flow meter 5 in the normally open state. At this time, the second manual ball valve 922 and the back pressure valve 921 on the rear conveying pipeline are in the closed state. The residual air in the pipeline is released through the lifting exhaust port 423 at the top of the vertical lifting section 422, and the liquid fills the pipeline under the conveying pressure of the centrifugal pump 6. When the pressure of the liquid in the pipeline is greater than the pressure limit that the back pressure valve 921 can withstand, the back pressure valve 921 channel opens, and the liquid flows through the return pipe section 44 and the check valve 95 into the main pipe section 41 to form a closed loop.

[0082] A pressure transmitter 46 installed upstream of flow meter 5 can monitor the pressure in the pipeline. When the pressure in the lifting pipe section 42 reaches the set value, the third control valve 93 opens, and the liquid flows through the lifting pipe section 42 to the inlet section 43. The fourth control valve 94 installed in the inlet section 43 opens, and the liquid flows into the mixing tank 200.

[0083] The high-precision liquid dispensing system 1000 of this invention includes a mixing tank 200 and a high-precision liquid conveying system 100 of any one of the above, wherein the discharge port of the conveying pipe assembly 4 is connected to the inlet of the mixing tank 200.

[0084] Therefore, the high-precision liquid dispensing system 1000 of this embodiment of the invention has the advantage of high dispensing accuracy.

[0085] Specifically, the feed inlet of the mixing tank 200 is located at the upper end of the mixing tank 200, and the feed section 43 of the conveying pipe assembly 4 is located above the mixing tank 200. The discharge port of the feed section 43 is connected to the feed inlet of the mixing tank 200 via a pipe. A fourth control valve 94 can also be installed on the pipe between the discharge port of the feed section 43 and the feed inlet of the mixing tank 200. This allows the liquid to enter the mixing tank 200 intermittently in coordination with the mixing process. Therefore, the high-precision liquid dispensing system 1000 of this embodiment of the invention has the advantage of a high degree of automation.

[0086] like Figure 1 and Figure 2 As shown, the feed pipe assembly 4 includes a feed tank section 43, and multiple mixing tanks 200 are arranged sequentially along the extension direction of the feed tank section 43. The feed tank section 43 has multiple discharge ports, and each discharge port is connected to one of the multiple mixing tanks 200. Therefore, it has the advantage of high batching efficiency.

[0087] Optionally, a second weighing module 82 can also be installed inside the mixing tank 200. This allows for further verification and confirmation of the batching accuracy based on the batching system 1000. This facilitates timely adjustments based on actual accuracy conditions.

[0088] Meanwhile, the mixing tank 200 can be equipped with multiple high-precision liquid conveying systems 100 as described above, so as to convey multiple materials. This improves the applicability of the conveying system 100.

[0089] Alternatively, the mixing tank 200 and the reflux section 44 can be connected by a steel wire braided hose.

[0090] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0093] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0094] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the 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.

[0095] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-precision liquid conveying system, characterized in that, It includes a storage tank, a first conveying pipe, a buffer exhaust hopper, a conveying pipe assembly, a flow meter, a centrifugal pump, and a second control valve, which are connected in sequence according to the direction of liquid flow. The discharge port of the conveying pipe assembly can be connected to the mixing tank. The feed pipe assembly includes a main pipe section, a lifting pipe section, and an inlet section that are connected sequentially in the direction of liquid flow. The inlet of the main pipe section is connected to the outlet of the buffer exhaust hopper, and the outlet of the inlet section is connected to the mixing tank. The upper end of the lifting pipe section is provided with a lifting vent, and the second control valve is disposed on the lifting vent; the lifting pipe section includes a connecting section connected sequentially in the direction of material flow and a lifting section extending in the vertical direction, the lifting vent is disposed at the upper end of the lifting section, the inlet of the connecting section is connected to the outlet of the main pipe section, the flow meter is disposed on the lifting section, and the centrifugal pump is disposed on the connecting section; or The feeding pipe assembly also includes a return pipe section. The lifting pipe section has a first discharge port and a second discharge port. The first discharge port is connected to the inlet of the feeding tank section, and the second discharge port is connected to the inlet of the return pipe section. The discharge port of the return pipe section is connected to the inlet of the lifting pipe section. The flow meter and the centrifugal pump are both installed on the lifting pipe section. The return pipe section and the lifting pipe section can form a circulation loop. The second control valve is installed in the lifting section near the second discharge port to control the connection of the circulation loop.

2. The high-precision liquid conveying system according to claim 1, characterized in that, The buffer vent includes a conical hopper and a first vent valve. The feed inlet of the conical hopper is connected to the discharge outlet of the first conveying pipe, and the discharge outlet of the conical hopper is connected to the feed inlet of the conveying pipe assembly. The area near the top of the conical hopper has a buffer vent, and the first vent valve is disposed on the buffer vent.

3. The high-precision liquid conveying system according to claim 1, characterized in that, It also includes a sewage discharge component, wherein the lower end of the buffer exhaust hopper has a sewage discharge port, and the sewage discharge component is connected to the sewage discharge port of the conveying pipe assembly; And / or, a first control valve is provided on the first conveying pipe; And / or, it also includes a first weighing module, which is disposed on the storage tank.

4. The high-precision liquid conveying system according to claim 3, characterized in that, The first control valve includes a first manual ball valve and a first pneumatic ball valve, which are arranged sequentially on the first conveying pipe according to the direction of liquid flow.

5. The high-precision liquid conveying system according to claim 1, characterized in that, The second control valve includes a back pressure valve and a second manual ball valve arranged sequentially according to the direction of liquid flow; And / or, the feed pipe assembly further includes a pressure gauge disposed on the feed pipe section; And / or, the feed pipe assembly further includes a pressure transmitter disposed in the feed pipe section and between the flow meter and the centrifugal pump.

6. The high-precision liquid conveying system according to claim 1, characterized in that, The material inlet section is inclined relative to the horizontal direction, and the inlet of the material inlet section is higher than the outlet of the material inlet section.

7. A high-precision liquid dispensing system, characterized in that, The system includes a mixing tank and a high-precision liquid conveying system according to any one of claims 1-6, wherein the discharge port of the conveying pipe assembly is connected to the inlet of the mixing tank.

8. The high-precision liquid dispensing system according to claim 7, characterized in that, The material conveying pipe assembly includes an inlet section, and there are multiple mixing tanks arranged sequentially along the extension direction of the inlet section. The inlet section has multiple discharge ports, and the multiple discharge ports of the inlet section are connected to the multiple mixing tanks one by one. And / or, the high-precision liquid delivery system has multiple systems, and the multiple high-precision liquid delivery systems are connected to the same mixing tank.

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