Metering device

Abstract

The utility model relates to the technical field of lithium battery positive electrode materials, and discloses a metering device, which comprises a stock bin, a metering device, a metering device and a metering device, the conveying assembly is arranged on the side, close to the first discharging port, of the stock bin, the conveying assembly comprises at least two conveying mechanisms, each conveying mechanism is provided with a first feeding port and a second discharging port, the first feeding ports of the at least two conveying mechanisms communicate with each other, the first feeding ports communicate with the first discharging port, and the second discharging ports of the at least two conveying mechanisms communicate with each other. The first feeding ports of the at least two conveying mechanisms are communicated, and the second discharging ports of the at least two conveying mechanisms are communicated, so that after materials enter the conveying assembly from the first discharging ports, the materials can be conveyed through the at least two conveying mechanisms at the same time to improve the discharging efficiency; and only one conveying mechanism is used for conveying so as to improve the discharging precision, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery cathode material technology, specifically to a metering device. Background Technology

[0002] When preparing lithium-ion battery cathode materials, the precursor and lithium hydroxide powder are typically mixed in a mixing device. Before mixing, the required weight of lithium hydroxide must be accurately weighed according to the formula, with the weighing accuracy controlled within 100g. Specifically, when weighing the lithium hydroxide powder, the side wall of the hopper is supported on a set of intervals on a weighing platform. The outlet is closed, and lithium hydroxide powder is added into the hopper, recording the value on the weighing platform at that moment. Then, the outlet is opened, and the lithium hydroxide powder is discharged into the mixing device until the difference between the weighing platform value and the aforementioned value is the same as the required weight of lithium hydroxide powder, at which point the outlet is closed. A single-spiral structure is usually installed at the outlet to control the discharge speed. However, reducing the rotation speed of the single-spiral structure to improve discharge accuracy leads to a decrease in discharge efficiency; conversely, increasing the rotation speed of the single-spiral structure leads to a decrease in discharge accuracy. Utility Model Content

[0003] In view of this, the present invention provides a metering device to solve the problem that the discharge method using a single spiral structure cannot simultaneously achieve both discharge efficiency and discharge accuracy.

[0004] This utility model provides a measuring device, comprising:

[0005] The hopper has a receiving cavity containing materials, and the hopper has a first discharge port communicating with the receiving cavity;

[0006] A conveying assembly is disposed on the side of the hopper near the first discharge port. The conveying assembly includes at least two conveying mechanisms. Each conveying mechanism has a first inlet and a second outlet. The first inlets of at least two conveying mechanisms are connected together, and the first inlet is connected to the first outlet. The second outlets of at least two conveying mechanisms are connected together.

[0007] Beneficial effects: By connecting the first inlet of at least two conveying mechanisms and the second outlet of at least two conveying mechanisms, the material can be conveyed by at least two conveying mechanisms simultaneously after entering the conveying component from the first outlet to improve the discharge efficiency, or by conveying by only one conveying mechanism to improve the discharge accuracy. The structure is simple and easy to operate.

[0008] In one alternative embodiment, the conveying mechanism is a spiral structure.

[0009] Beneficial effects: By using a spiral structure to convey materials, the control of discharge accuracy is more precise.

[0010] In one alternative implementation, at least two of the conveying mechanisms have different helical dimensions.

[0011] Beneficial effects: By setting at least two conveying mechanisms with different screw sizes, the conveying mechanism with a larger screw size can ensure material discharge efficiency, while the conveying mechanism with a smaller screw size can ensure material discharge accuracy.

[0012] In one alternative embodiment, the helical dimension of the conveying mechanism closer to the first discharge port is greater than the helical dimension of the conveying mechanism farther from the first discharge port.

[0013] Beneficial effects: By setting the spiral size of the conveying mechanism closer to the first discharge port to be greater than that of the conveying mechanism farther from the first discharge port, it is possible to avoid the accumulation of materials in the conveying mechanism farther from the first discharge port, which would lead to waste and inconvenience in cleaning.

[0014] In one optional implementation, the conveying mechanism includes:

[0015] A housing for containing the material;

[0016] A spiral component is disposed inside the housing and drives the material to be conveyed from the first inlet to the second outlet.

[0017] In one optional implementation, the conveying mechanism includes:

[0018] The first driving component is connected to the spiral component and is used to drive the spiral component to rotate.

[0019] Beneficial effects: By setting the first driving component, the screw component can be driven to rotate, thereby driving the material to be conveyed inside the shell.

[0020] In one optional embodiment, the extension direction of the conveying mechanism is horizontal;

[0021] And / or, the first discharge port is positioned opposite to the first inlet port;

[0022] And / or, the first feed inlets of at least two of the conveying mechanisms are arranged opposite each other;

[0023] And / or, at least two of the second discharge ports of the conveying mechanisms are arranged opposite each other.

[0024] Beneficial effects: By setting the extension direction of the conveying mechanism to be horizontal, it is convenient for materials to enter the conveying mechanism away from the first discharge port from the conveying mechanism near the first discharge port, thereby improving the material discharge efficiency; by setting the first discharge port and the first feed port opposite each other, it is convenient for materials to fall into the conveying mechanism by gravity; by setting the first feed ports of at least two conveying mechanisms opposite each other, it is convenient for materials to be transferred between multiple conveying mechanisms by gravity; by setting the second discharge ports of at least two conveying mechanisms opposite each other, it is convenient for materials to be transferred between multiple conveying mechanisms by gravity.

[0025] In one optional embodiment, the metering device includes:

[0026] A stirring assembly, one end of which extends into the receiving cavity, is used to stir the material.

[0027] Beneficial effects: By setting up a stirring component, the material can be stirred, thereby preventing the material from bridging in the silo and thus preventing it from being discharged smoothly.

[0028] In one optional embodiment, the hopper is provided with a second feed inlet communicating with the receiving cavity, and a first control element is provided at the second feed inlet for controlling the feed speed;

[0029] And / or, a second control element is provided at the second discharge port of the conveying mechanism, which is located away from the first discharge port, for controlling the discharge speed.

[0030] Beneficial effects: By setting the first control component, the feeding speed can be controlled, thereby precisely controlling the feeding amount; by setting the second control component, the discharging speed can be controlled, thereby precisely controlling the discharging amount.

[0031] In one optional embodiment, the metering device includes:

[0032] A weighing component is provided on the side wall of the silo for weighing the material in the receiving cavity.

[0033] Beneficial effects: By setting up a weighing component, the conveying speed of the conveying mechanism can be controlled according to the changes in the weight of the material, thereby improving the discharge accuracy. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of a metering device according to an embodiment of the present utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Hopper; 11. First discharge port; 12. Second inlet port; 2. Conveying mechanism; 21. First inlet port; 22. Second discharge port; 23. Shell; 24. Screw; 25. First drive component; 3. Mixing assembly; 31. Mixing component; 32. Second drive component; 4. First control component; 5. Second control component; 6. Weighing assembly; 61. Weighing platform; 62. Weighing component. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] The following is combined Figure 1 The following describes embodiments of the present invention.

[0040] According to an embodiment of the present invention, a metering device is provided, comprising: a hopper 1 having a receiving cavity containing material, the hopper 1 having a first discharge port 11 communicating with the receiving cavity; and a conveying assembly disposed on the side of the hopper 1 near the first discharge port 11, the conveying assembly including at least two conveying mechanisms 2, each conveying mechanism 2 having a first inlet 21 and a second discharge port 22, the first inlets 21 of the at least two conveying mechanisms 2 being connected and connected to the first discharge port 11, and the second discharge ports 22 of the at least two conveying mechanisms 2 being connected.

[0041] By connecting the first inlet 21 of at least two conveying mechanisms 2 and the second outlet 22 of at least two conveying mechanisms 2, the material can be conveyed by at least two conveying mechanisms 2 simultaneously after entering the conveying assembly from the first outlet 11 to improve the discharge efficiency, or by conveying by only one conveying mechanism 2 to improve the discharge accuracy. The structure is simple and the operation is convenient.

[0042] In one embodiment, the material is lithium hydroxide powder. As an alternative implementation, the material may also be lithium manganese oxide powder or other fluid materials, without further limitation.

[0043] like Figure 1As shown, in one embodiment, the hopper 1 is provided with a second inlet 12 communicating with the receiving cavity. Specifically, the top of the hopper 1 is provided with a cover plate, and the cover plate has a second inlet 12. Lithium hydroxide powder enters the receiving cavity through the second inlet 12. As an alternative implementation, the top of the hopper 1 may be open and without a cover plate.

[0044] like Figure 1 As shown, in one embodiment, there are two conveying mechanisms 2, both extending horizontally. By setting the extension direction of the conveying mechanisms 2 to be horizontal, it facilitates the flow of lithium hydroxide powder from the conveying mechanism 2 near the first discharge port 11 to the conveying mechanism 2 away from the first discharge port 11, thereby improving the discharge efficiency of the lithium hydroxide powder. As an alternative implementation, there may also be three or four conveying mechanisms 2, without further limitation. As an alternative implementation, the conveying mechanisms 2 may also be inclined, but the inclination angle should not be too large to prevent lithium hydroxide powder from being unable to flow from the conveying mechanism 2 near the first discharge port 11 to the conveying mechanism 2 away from the first discharge port 11.

[0045] like Figure 1 As shown, in one embodiment, the first discharge port 11 and the first feed port 21 are arranged opposite to each other; the first feed ports 21 of the two conveying mechanisms 2 are arranged opposite to each other; and the second discharge ports 22 of the two conveying mechanisms 2 are arranged opposite to each other. Further, connecting pipes are provided between the first discharge port 11 and the first feed port 21, between the first feed ports 21 of the two conveying mechanisms 2, and between the second discharge ports 22 of the two conveying mechanisms 2. By arranging the first discharge port 11 and the first feed port 21 opposite to each other, lithium hydroxide powder is facilitated to fall into the conveying mechanism 2 by gravity; by arranging the first feed ports 21 of the two conveying mechanisms 2 opposite to each other, lithium hydroxide powder is facilitated to be transferred between the multiple conveying mechanisms 2 by gravity; and by arranging the second discharge ports 22 of the two conveying mechanisms 2 opposite to each other, lithium hydroxide powder is facilitated to be transferred between the multiple conveying mechanisms 2 by gravity. As an alternative implementation, connecting pipes may not be provided between the first discharge port 11 and the first feed port 21, between the first feed ports 21 of the two conveying mechanisms 2, and between the second discharge ports 22 of the two conveying mechanisms 2. As an alternative implementation, the first discharge port 11 and the first feed port 21 may be staggered and connected to each other via a connecting pipe. Alternatively, the first feed ports 21 of the two conveying mechanisms 2 may be staggered and connected to each other via a connecting pipe. Finally, the second discharge ports 22 of the two conveying mechanisms 2 may be staggered and connected to each other via a connecting pipe.

[0046] like Figure 1As shown, in one embodiment, the conveying mechanism 2 is a spiral structure. Further, the spiral dimensions of the two conveying mechanisms 2 are different, with the spiral dimension of the conveying mechanism 2 closer to the first discharge port 11 being larger than that of the conveying mechanism 2 farther from the first discharge port 11. By using a spiral structure to convey lithium hydroxide powder, the control of discharge accuracy is more precise; by setting the spiral dimensions of the two conveying mechanisms 2 to be different, the conveying mechanism 2 with the larger spiral dimension can ensure discharge efficiency, while the conveying mechanism 2 with the smaller spiral dimension can ensure discharge accuracy; by setting the spiral dimension of the conveying mechanism 2 closer to the first discharge port 11 to be larger than that of the conveying mechanism 2 farther from the first discharge port 11, the accumulation of lithium hydroxide powder in the conveying mechanism 2 farther from the first discharge port 11 can be avoided, thus preventing waste and inconvenience in cleaning. As an alternative implementation, the conveying mechanism 2 can also be a conveyor belt or other conveying structure; no further limitations are imposed here. As an alternative implementation, each conveying mechanism 2 may have the same helical size. By providing multiple conveying mechanisms 2 and setting the helical size of each conveying mechanism 2 to be relatively small, both discharge efficiency and discharge accuracy can be ensured simultaneously. As an alternative implementation, the helical size of the conveying mechanism 2 closer to the first discharge port 11 may be smaller than the helical size of the conveying mechanism 2 farther from the first discharge port 11.

[0047] like Figure 1 As shown, in one embodiment, the conveying mechanism 2 includes: a housing 23 for containing lithium hydroxide powder; and a screw 24 disposed within the housing 23, which drives the lithium hydroxide powder from the first inlet 21 to the second outlet 22. Further, the conveying mechanism 2 includes: a first drive 25 connected to the screw 24 for driving the screw 24 to rotate. Specifically, the screw 24 includes a rotating shaft and helical blades fixed at intervals on the rotating shaft; the first drive 25 is a first motor; the cross-sectional diameter of the rotating shaft of the conveying mechanism 2 near the first outlet 11, as well as the diameter and pitch of the helical blades, are larger than those of the conveying mechanism 2 away from the first outlet 11. By providing the first drive 25, the screw 24 can be driven to rotate, thereby driving the lithium hydroxide powder to be conveyed within the housing 23. As an alternative implementation, the first drive 25 can also be a first gripping part, which, by manually rotating the first gripping part, drives the screw 24 to rotate.

[0048] like Figure 1As shown, in one embodiment, the metering device includes a stirring assembly 3, one end of which extends into the receiving cavity for stirring lithium hydroxide powder. Specifically, the stirring assembly 3 includes a stirring element 31, one end of which extends into the receiving cavity; and a second driving element 32, connected to the other end of the stirring element 31, for driving the stirring element 31 to rotate. The stirring element 31 is a stirring paddle, and the second driving element 32 is a second motor. By providing the stirring assembly 3, the lithium hydroxide powder can be stirred, thereby preventing the lithium hydroxide powder from bridging within the hopper 1 and hindering smooth discharge. Alternatively, an opening can be provided on the side wall of the hopper 1, and compressed gas can be introduced into the opening to prevent the lithium hydroxide powder from bridging within the hopper 1. Alternatively, the second driving element 32 can also be a second gripping part, which can be manually rotated to drive the stirring element 31 to rotate.

[0049] like Figure 1 As shown, in one embodiment, a first control element 4 is provided at the second feed inlet 12 to control the feeding speed. The first control element 4 is a first valve. By providing the first control element 4, the feeding speed can be controlled, thereby precisely controlling the feeding amount. As an alternative implementation, the first control element 4 may not be provided. Alternatively, the first control element 4 may be a solenoid valve, or a baffle driven by a motor; no further limitations are imposed here.

[0050] like Figure 1 As shown, in one embodiment, a second control element 5 is provided at the second discharge port 22 of the conveying mechanism 2, which is located away from the first discharge port 11, to control the discharge speed. The second control element 5 is a second valve. By providing the second control element 5, the discharge speed can be controlled, thereby precisely controlling the discharge volume. As an alternative implementation, the second control element 5 may not be provided; instead, the discharge speed can be controlled by controlling the first motor. As another alternative implementation, the second control element 5 may be a solenoid valve, or a baffle driven by a motor; no further limitations are imposed here.

[0051] like Figure 1As shown, in one embodiment, the metering device includes a weighing component 6, disposed on the side wall of the hopper 1, for weighing the lithium hydroxide powder in the containing cavity. Specifically, the weighing component 6 includes two weighing platforms 61 spaced apart, with the hopper 1 fixed between the two weighing platforms 61; and a weighing element 62 disposed between the weighing platforms 61 and the hopper 1. The weighing element 62 is a weight sensor. By setting the weighing component 6, the conveying speed of the conveying mechanism 2 can be controlled according to the change in the weight of the lithium hydroxide powder, thereby improving the discharge accuracy. As an alternative implementation, the weighing component 6 can also be disposed near the first discharge port 11 in the hopper 1. As an alternative implementation, three or four weighing platforms 61 can also be spaced apart along the circumference of the hopper 1; no further limitations are imposed here.

[0052] In one embodiment, the metering device includes a control system, which is connected to the first drive member 25, the second drive member 32, the first control member 4, the second control member 5, and the weighing member 62.

[0053] In one embodiment, the metering device operates as follows:

[0054] When feeding material into hopper 1, the weight to be fed is input into the control system; the weight sensor records the weight before feeding and feeds it back to the control system; the control system controls the first valve to open and starts feeding, and the weight sensor records and feeds back the weight change in hopper 1 in real time; when the feeding amount reaches the set value, the control system controls the first valve to close and the feeding ends.

[0055] When discharging from silo 1, the weight to be discharged is input into the control system; the weight sensor records the weight before discharge and feeds it back to the control system; the control system controls the second valve to open, the second motor to start, and drives the stirring paddle to rotate to stir the lithium hydroxide powder; the two first motors to start, and drive the two spiral blades to rotate; the lithium hydroxide powder begins to be discharged under the drive of the spiral blades; the weight sensor records and feeds back the weight change in silo 1 in real time; when the discharge amount is close to the set value, the control system controls the first motor near the first discharge port 11 to stop rotating, while the first motor away from the first discharge port 11 continues to drive the spiral blades to rotate for discharge; when the discharge amount reaches the set value, the control system controls the second valve to close, the second motor and the first motor away from the first discharge port 11 to stop rotating, and the discharge ends.

[0056] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A measuring device, characterized in that, include: The silo (1) is provided with a receiving cavity, which contains materials, and the silo (1) is provided with a first discharge port (11) communicating with the receiving cavity; A conveying assembly is located on the side of the hopper (1) near the first discharge port (11). The conveying assembly includes at least two conveying mechanisms (2). Each conveying mechanism (2) has a first inlet (21) and a second discharge port (22). The first inlets (21) of at least two conveying mechanisms (2) are connected to each other, and the first inlet (21) is connected to the first discharge port (11). The second discharge ports (22) of at least two conveying mechanisms (2) are connected to each other.

2. The metering device according to claim 1, characterized in that, The conveying mechanism (2) has a spiral structure.

3. The metering device according to claim 2, characterized in that, At least two of the conveying mechanisms (2) have different helical dimensions.

4. The metering device according to claim 3, characterized in that, The screw dimension of the conveying mechanism (2) closer to the first discharge port (11) is greater than the screw dimension of the conveying mechanism (2) farther away from the first discharge port (11).

5. The measuring device according to any one of claims 2 to 4, characterized in that, The conveying mechanism (2) includes: A housing (23) for containing the material; The spiral component (24) is located inside the housing (23) and drives the material to be conveyed from the first feed port (21) to the second discharge port (22).

6. The metering device according to claim 5, characterized in that, The conveying mechanism (2) includes: The first driving member (25) is connected to the spiral member (24) and is used to drive the spiral member (24) to rotate.

7. The measuring device according to any one of claims 1 to 4, characterized in that, The extension length direction of the conveying mechanism (2) is horizontal; And / or, the first discharge port (11) is disposed opposite to the first feed port (21); And / or, the first feed ports (21) of at least two of the conveying mechanisms (2) are arranged opposite each other; And / or, at least two of the second discharge ports (22) of the conveying mechanisms (2) are arranged opposite each other.

8. The measuring device according to any one of claims 1 to 4, characterized in that, The metering device includes: The stirring assembly (3) has one end inserted into the receiving cavity for stirring the material.

9. The measuring device according to any one of claims 1 to 4, characterized in that, The hopper (1) is provided with a second feed inlet (12) that communicates with the receiving cavity. A first control element (4) is provided at the second feed inlet (12) to control the feeding speed. And / or, a second control element (5) is provided at the second discharge port (22) of the conveying mechanism (2) away from the first discharge port (11) for controlling the discharge speed.

10. The measuring device according to any one of claims 1 to 4, characterized in that, The metering device includes: A weighing component (6) is provided on the side wall of the silo (1) for weighing the material in the containment cavity.

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