Accurate metering liquid feeding system

Abstract

A precise metering liquid feeding system is characterized by comprising a liquid feeding pipe provided with a liquid inlet end and a liquid outlet end, and a liquid conveying pump used for conveying liquid from the liquid inlet end to the liquid outlet end is arranged in the direction from the liquid inlet end to the liquid outlet end; a first block valve; a regulating valve; and a second block valve. The liquid return pipe is communicated with the liquid conveying pipe, one end of the liquid return pipe is communicated between the liquid conveying pump and the liquid inlet end, the other end of the liquid return pipe is communicated between the liquid conveying pump and the first block valve, and the liquid return pipe is provided with a third block valve. Therefore, the effect of accurately feeding liquid can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid delivery systems, in particular to a precise metering liquid delivery system. Background Art

[0002] The production of battery slurry is the first step in battery production, which includes mixing the formula of battery active materials, conductive agents, polymer binders, and solvents. Since slurry is one of the important core raw materials of batteries, the accuracy of the slurry formula, the uniformity, stability, and fluidity of the slurry have a considerable impact on battery performance. Therefore, when manufacturing battery slurry, the first priority is to accurately control the proportion of slurry components and a good mixing process. In order to achieve accurate slurry component ratios, it should be known that issues including transportation should be included. Different control valves or different detectors should be installed in the transportation process or transportation pipeline to form a control valve and detector system individually, and then apply them to each other.

[0003] Among them, there are many types of detectors, and the detection methods include measuring mass, density, and volume. It is an indispensable component. However, detectors usually have their own problems that are difficult to avoid. For example, in a mass flow meter, when air is mixed into the liquid, the detector will produce errors in estimating its density, and further estimate the wrong mass; other factors such as external vibration, temperature, and material properties can all affect the detector. In other words, there is a need for other methods to reduce the impact or interference of external factors on the detector, so that the data of the detector is stable and further achieves the effect of accuracy.

[0004] The above mentioned method includes the configuration of a control valve in the delivery pipe. There are also many types of control valves, including switch type (ON / OFF), regulating type (such as pressure must reach a certain value), etc., and after being combined in the delivery pipe in a certain way, it can play a higher operability and management. A regulating valve is a valve that can affect the liquid in the pipeline through setting. Its purpose is to provide a condition, and only the liquid that meets the condition can pass through.

[0005] In some technologies related to liquid delivery systems, in order to achieve precision, an air-expelling structure is included so that when the liquid passes through the air-expelling structure and then passes through the flowmeter, the error of the flowmeter in measuring the liquid can be reduced; however, although the structure has an air-expelling effect, it has no setting capability and cannot be adjusted for various liquids. For example, the bubble-expelling effect of high-viscosity liquids will be discounted, and its actual bubble-expelling function may also be hindered.

[0006] In some technologies related to liquid delivery systems, in order to achieve a precise effect, there are improvements to the pumps. However, since the delivery principles of various pumps are slightly different, some pumps have problems such as sticking. When the pumps are running at a low speed or switching states, it will cause instability in the flow rate. Without valve control, it is difficult to avoid inaccurate liquid delivery. Of course, this will also interfere with the detection of the flow meter.

[0007] The above-mentioned improvements for the purpose of accurate metered liquid delivery may have their shortcomings, or may be compatible with the present invention, or may even achieve better results based on the present invention; in view of this, by adding, removing or configuring components in the liquid delivery pipeline, supplemented by appropriate monitors, there will be an opportunity to solve the problem of liquid delivery accuracy. Utility Model Content

[0008] In order to solve the problem of liquid delivery accuracy, the present invention provides a precise metering liquid delivery system, characterized in that it includes: a liquid delivery tube, having a liquid inlet end and a liquid outlet end, wherein along the liquid inlet end toward the liquid outlet end, it includes: an infusion pump for transporting a liquid from the liquid inlet end to the liquid outlet end; a first shut-off valve; a regulating valve; and a second shut-off valve.

[0009] Preferably, the precise metering liquid delivery system further includes a return liquid pipe connected to the delivery liquid pipe, one end of which is connected between the infusion pump and the liquid inlet end, and the other end of which is connected between the infusion pump and the first shut-off valve, wherein the return liquid pipe is provided with a third shut-off valve.

[0010] Preferably, the infusion pump includes: a centrifugal pump, a vacuum pump, a screw pump, a gear pump, an axial flow pump, a magnetic pump, a pipeline pump, a pressure test pump, a metering pump, a shielded pump, a booster pump, a high-pressure pump, a rotor pump, a chemical pump, a vortex pump, a diaphragm pump, or a submersible pump.

[0011] Preferably, the first shut-off valve comprises: a ball valve, a butterfly valve, a stop valve, a gate valve, a plug valve, or a plunger valve.

[0012] Preferably, the second shut-off valve comprises: a ball valve, a butterfly valve, a stop valve, a gate valve, a plug valve, or a plunger valve.

[0013] Preferably, the third shut-off valve comprises: a ball valve, a butterfly valve, a stop valve, a gate valve, a plug valve, or a plunger valve.

[0014] Preferably, the regulating valve comprises: a back pressure valve, a throttle valve, or a pressure reducing valve, which is used to regulate the pressure of the fluid in the liquid delivery pipe.

[0015] Preferably, the precise metering liquid delivery system further includes a flow meter, which is arranged between the first shut-off valve and the regulating valve, and includes: a differential pressure flow meter, an orifice flow meter, a venturi flow meter, a flow nozzle flow meter, a variable area flow meter, a rotor flow meter, a velocity flow meter, a Pitot tube flow meter, a turbine flow meter, a vortex flow meter, an electromagnetic flow meter, an ultrasonic flow meter, a volumetric flow meter, a mass flow meter, a thermal mass flow meter, a Coriolis flow meter, or an open channel flow meter.

[0016] Preferably, the precise metering liquid delivery system further comprises a solvent tank connected to the liquid inlet end.

[0017] Preferably, the precise metering liquid delivery system further comprises a stirring tank connected to the liquid outlet.

[0018] Preferably, the precise metering liquid delivery system further comprises a detection module disposed in the stirring tank.

[0019] Preferably, the detection module includes: a weight detection module or a volume detection module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a creation, illustrating one implementation of the utility model. DETAILED DESCRIPTION

[0021] The following will describe the invention in detail through specific examples, but this description is only exemplary and is only used to explain the invention rather than to limit the invention. In addition, any embodiment does not need to achieve all the purposes, advantages, or features of the invention. Any equivalent changes and modifications made by anyone based on the scope and description of the invention should be covered by the scope of this patent.

[0022] See also Figure 1 ,like Figure 1 As shown, the invention provides a precise metering liquid delivery system, a precise metering liquid delivery system, characterized in that it comprises: a liquid delivery tube 1, having a liquid inlet end 17 and a liquid outlet end 18, wherein the liquid inlet end 17 is sequentially arranged toward the liquid outlet end 18 and comprises: an infusion pump 11, used to transport a liquid from the liquid inlet end to the liquid outlet end;

[0023] a first shut-off valve 12 ; a regulating valve 14 ; and a second shut-off valve 15 .

[0024] In some preferred embodiments, the infusion pump 11 further includes: a centrifugal pump, a vacuum pump, a screw pump, a gear pump, an axial flow pump, a magnetic pump, a pipeline pump, a pressure test pump, a metering pump, a shielded pump, a booster pump, a high-pressure pump, a rotor pump, a chemical pump, a vortex pump, a diaphragm pump, or a submersible pump, but is not limited to this.

[0025] like Figure 1 As shown, in some preferred embodiments, the first shut-off valve 12 includes:

[0026] Ball valves, butterfly valves, stop valves, gate valves, plug valves, or plunger valves are not limited hereto; and the second shut-off valve 15 includes: ball valves, butterfly valves, stop valves, gate valves, plug valves, or plunger valves, and is not limited thereto; in addition, the regulating valve 14 includes: back pressure valves, throttle valves, or pressure reducing valves, and is also not limited thereto, and can be used to regulate the pressure of the fluid in the liquid delivery pipe. The shut-off valve is a means of active control, that is, it can be used to determine whether the internal liquid of the pipeline can pass through the shut-off valve. When the infusion pump 11 disposed in the liquid delivery pipe 1 is turned on, the first shut-off valve 12 and the second shut-off valve 15 should be opened correspondingly to release the liquid output by the infusion pump 11. In addition, the regulating valve 14 is a means of indirect control, which can determine whether the passing liquid should have at least one pressure value by setting the threshold value of the regulating valve 14.

[0027] like Figure 1 As shown, in some more preferred embodiments, the regulating valve 14 is arranged between the first shut-off valve 12 and the second shut-off valve 15, and its arrangement further includes being between the first shut-off valve 12 and the second shut-off valve 15 and closer to the second shut-off valve 15, or between the first shut-off valve 12 and the second shut-off valve 15 and closer to the first shut-off valve 12; wherein the regulating valve 14 provides a means for stabilizing the liquid pressure and flow rate for the pipeline or conduit between the first shut-off valve 12 and the second shut-off valve 15. For example, when the infusion pump 11 disposed in the liquid delivery pipe 1 is turned on, and the first shutoff valve 12 and the second shutoff valve 15 are correspondingly opened, the liquid output by the infusion pump 11 will pass through the first shutoff valve 12; and before facing the second shutoff valve 15, the liquid output by the infusion pump 11 will be limited or stabilized by the regulating valve 14. After the pipeline liquid pressure value between the first shutoff valve 12 and the second shutoff valve 15 reaches or stabilizes to the set required pressure value, the regulating valve 14 will release the liquid output by the infusion pump 11, so that the liquid output by the infusion pump 11 further flows through the second shutoff valve 15. In this state, the regulating valve 14 will be able to prevent the solvent from being mixed with bubbles in the liquid delivery pipe 1, or from passing through the second shutoff valve 15 in an uneven flow rate. It can be imagined that this situation can be avoided, for example, when the infusion pump is just started, to achieve a precise effect. On the contrary, if the regulating valve 14 is lost, or only the first shutoff valve 12 or the second shutoff valve 15 is provided, this function cannot be obtained.

[0028] In some preferred embodiments, the precise metering liquid delivery system further comprises a solvent tank 10 connected to the liquid inlet 17; in addition, the precise metering liquid delivery system further comprises a flow meter 13 disposed between the first shut-off valve 12 and the regulating valve 14, which comprises:

[0029] Differential pressure flowmeter, orifice flowmeter, venturi flowmeter, flow nozzle flowmeter, variable area flowmeter, rotor flowmeter, velocity flowmeter, pitot tube flowmeter, turbine flowmeter, vortex flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, volumetric flowmeter, mass flowmeter, thermal mass flowmeter, Coriolis flowmeter, or open channel flowmeter; and the precise metering liquid delivery system further includes a stirring tank 16 connected to the liquid outlet 18; and the precise metering liquid delivery system further includes a detection module 160, which is arranged in the stirring tank 16, wherein the detection module 160 includes: a weight detection module, or a volume detection module. By setting the flowmeter 13, the mass or volume of the liquid flowing through the liquid delivery pipe 1 will be monitored, and the detection module 160 arranged in the stirring tank 16 can further verify the mass or volume of the liquid flowing through the liquid delivery pipe 1, which will cooperate with the flowmeter 13 to achieve the effect of precise metering.

[0030] In some preferred embodiments, the precise metering liquid delivery system further includes a return pipe 2, which is connected to the delivery pipe 1, one end of which is connected between the infusion pump 11 and the liquid inlet end 17, and the other end of which is connected between the infusion pump 11 and the first shut-off valve 12, wherein the return pipe 2 is provided with a third shut-off valve 21, and the third shut-off valve 21 includes: a ball valve, a butterfly valve, a stop valve, a gate valve, a plug valve, or a plunger valve. Furthermore, the return pipe 2 and the third shut-off valve 21 will make the delivery pipe 1 safer, as described below: when the infusion pump 11 arranged on the delivery pipe 1 is turned on, after the first shut-off valve 12 and the second shut-off valve 15 are opened correspondingly, the liquid output by the infusion pump 11 will pass through the first shut-off valve 12. At this time, the third shut-off valve 21 should be closed at the same time to prevent the liquid output by the infusion pump 11 from flowing back through the return pipe 2 and causing futile waste; however, after the liquid delivery is completed, the first shut-off valve 12 and the second shut-off valve 15 should be closed at the same time, and the third shut-off valve 21 should be opened, and then the infusion pump 11 should be closed. In terms of operation, since the operation of the first shut-off valve 12 and the second shut-off valve 15 is the most timely and decisive, it can immediately stop the continued liquid delivery. Here, opening the third shut-off valve 21 will allow the liquid in the liquid delivery tube 1 to have a place to go before the infusion pump 11 is closed, thereby protecting the safety of the liquid delivery tube 1 from the risk of bursting. At the same time, it can also be used for precise operation of the part where the liquid delivery is stopped.

[0031] The precise metering liquid delivery system provided by the present invention has the main advantages compared with the conventional technology: the regulating valve 14 is arranged between the first shut-off valve 12 and the second shut-off valve 15, wherein the regulating valve 14 can be set with a pressure parameter or threshold, further providing a pressure control method to stabilize the liquid pressure between the first shut-off valve 12 and the second shut-off valve 15; accordingly, the liquid delivered by the infusion pump 11 will be in a stable state and enter the stirring tank 16 from the solvent tank 10, and at the same time, the flow meter 13 and the detection module 160 can observe the state of liquid delivery. In terms of operation, due to the existence of the reflux pipe 2 and the third shut-off valve 21, in cooperation with the first shut-off valve 12 and the second shut-off valve 15 arranged on the liquid delivery pipe 1, the risk of the liquid delivery pipe 1 bursting can be largely avoided, especially when the infusion pump 11 is switched on and off. At the same time, under this design, the operator can decisively stop the liquid delivery, that is, cut off the first shut-off valve 12 or the second shut-off valve 15, so that the purpose of precision can be achieved at the end of the operation.

Claims

1. A precise metering liquid delivery system, characterized in that: include: A liquid delivery pipe having a liquid inlet end and a liquid outlet end, wherein the direction from the liquid inlet end toward the liquid outlet end includes: an infusion pump, used to transport a liquid from the liquid inlet end to the liquid outlet end; a first shut-off valve; a regulating valve; and A second shut-off valve.

2. The precise metering liquid delivery system according to claim 1, characterized in that: The precise metering liquid delivery system further includes a liquid return pipe connected to the liquid delivery pipe, one end of which is connected between the infusion pump and the liquid inlet end, and the other end of which is connected between the infusion pump and the first shut-off valve, wherein the liquid return pipe is provided with a third shut-off valve.

3. The precise metering liquid delivery system according to claim 1, characterized in that: The first cut-off valve includes: a ball valve, a butterfly valve, a stop valve, a gate valve, a plug valve, or a plunger valve.

4. The precise metering liquid delivery system according to claim 1, characterized in that: The second shut-off valve includes: a ball valve, a butterfly valve, a stop valve, a gate valve, a plug valve, or a plunger valve.

5. The precise metering liquid delivery system according to claim 2, characterized in that: The third shut-off valve includes: a ball valve, a butterfly valve, a stop valve, a gate valve, a plug valve, or a plunger valve.

6. The precise metering liquid delivery system according to claim 1, characterized in that: The regulating valve includes: a back pressure valve, a throttle valve, or a pressure reducing valve, which is used to regulate the pressure of the fluid in the liquid delivery pipe.

7. The precise metering liquid delivery system according to claim 1, characterized in that: The precise metering liquid delivery system further comprises a flow meter, which is arranged between the first cut-off valve and the regulating valve.

8. The precise metering liquid delivery system according to claim 1, characterized in that: The precise metering liquid delivery system further comprises a solvent tank connected to the liquid inlet end.

9. The precise metering liquid delivery system according to claim 1, characterized in that: The precise metering liquid delivery system further comprises a stirring tank connected to the liquid outlet.

10. The precise metering liquid delivery system according to claim 9, characterized in that: The precise metering liquid delivery system further comprises a detection module, which is arranged in the stirring tank.

11. The precise metering liquid delivery system according to claim 10, characterized in that: The detection module includes: a weight detection module or a volume detection module.

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