Weighing assembly of decrement scale capable of improving weighing precision

Abstract

The utility model discloses a weight reduction scale weighing assembly capable of improving weighing precision, which comprises a weight reduction scale main body and a dispersion tank main body communicated with the weight reduction scale main body through a pipeline, and an upper butterfly valve and a lower butterfly valve are respectively arranged on the pipeline for connecting the dispersion tank main body and the weight reduction scale main body. And a discharge port at the lower end of the decrement scale main body is communicated with an upper port of the pipeline through the first screw conveyer and the second screw conveyer. According to the weight reduction scale weighing assembly, the upper butterfly valve and the lower butterfly valve are respectively arranged on the connecting pipeline of the dispersing tank main body and the weight reduction scale main body, the dispersing tank ventilation cap and the weight reduction scale ventilation cap are respectively arranged at the upper ends of the dispersing tank main body and the weight reduction scale main body, and the weight reduction scale is obtained by regulating and controlling the cooperative operation relation of the four parts. The air in the dispersion bin can be quickly exhausted, the air pressure balance in the reduction scale bin is ensured, the reduction scale is stabilized, and the discharging precision is improved.

Description

Technical Field

[0001] The utility model belongs to the field of weight-reducing scales, and in particular relates to a weight-reducing scale weighing component for improving weighing accuracy. Background Art

[0002] The accuracy of the batching weight is a key factor in the preparation of lithium iron phosphate, the positive electrode material of lithium-ion batteries. The measuring tool used in the batching process is a reduction scale. During the operation of the reduction scale, the gas in the dispersion tank rises into the reduction scale bin, causing the pressure in the reduction scale bin to be unbalanced, resulting in the fluctuation of the weighing accuracy of the reduction scale from 0.5% to 0.2%, resulting in material feeding deviation and uncontrolled proportioning.

[0003] Existing technology, such as patent number 2021221490519, named "A precision weight-reducing weighing device for conveying powder", in order to achieve the effect of high-precision conveying and metering, a high-precision weighing sensor is installed on the silo of the weight-reducing scale to cooperate with the conveying of the first spiral and the second spiral of the screw conveyor. The screw conveyor also includes a feed port and a discharge pipe. The bottom end of the discharge pipe is a discharge port, and an automatic control valve is provided at the discharge port. In order to reduce the gas content in the powder, an exhaust port is provided at the top of the discharge pipe for exhaust.

[0004] Therefore, in order to improve the accuracy of the ingredient weight in the preparation process of lithium iron phosphate, the weighing device is continuously optimized and improved to achieve the goal of high material feeding accuracy. Utility Model Content

[0005] Purpose of the utility model: The technical problem to be solved by the utility model is to provide an optimized and improved weight-reduction scale weighing component, which can quickly discharge the gas in the dispersion bin, ensure the air pressure balance in the weight-reduction scale bin, stabilize the weight-reduction scale, and improve the feeding accuracy.

[0006] Technical solution: The utility model discloses a subtraction scale weighing assembly for improving weighing accuracy, which comprises a subtraction scale main body, a dispersion tank main body connected to the subtraction scale main body through a pipeline, an upper butterfly valve and a lower butterfly valve are respectively provided on the pipeline connecting the dispersion tank main body and the subtraction scale main body, and the lower end discharge port of the subtraction scale main body is connected to the upper port of the pipeline through a first screw conveyor and a second screw conveyor.

[0007] Furthermore, the feed ends of the first screw conveyor and the second screw conveyor of the weight loss scale weighing assembly are connected to the discharge port of the weight loss scale body, and the discharge ends of the first screw conveyor and the second screw conveyor are connected to the upper port of the pipeline.

[0008] Furthermore, a motor is connected to the side of the first screw conveyor of the weight loss scale weighing assembly close to the weight loss scale body, which is used to adjust the rotation speed of the first screw conveyor and provide power.

[0009] Furthermore, a motor is connected to one side of the second screw conveyor of the weighing assembly of the weight loss scale close to the main body of the weight loss scale, which is used to adjust the rotation speed of the second screw conveyor and provide power.

[0010] Furthermore, a weight loss scale breather cap, a feed inlet, and an observation port are respectively provided at the upper end of the bin body of the main body of the weight loss scale of the weighing assembly of the weight loss scale.

[0011] Furthermore, the upper end of the main body of the dispersion tank of the weighing assembly of the weight loss scale is connected to the lower port of the pipeline, and a dispersion tank breather cap is also provided at the upper end of the main body of the dispersion tank.

[0012] Beneficial effects: Compared with the prior art, the advantages of the present utility model are as follows: By respectively arranging an upper butterfly valve and a lower butterfly valve on the connecting pipeline between the main body of the dispersion tank and the main body of the weight loss scale, and respectively arranging a dispersion tank breather cap and a weight loss scale breather cap at the upper ends of the main body of the dispersion tank and the main body of the weight loss scale, and by regulating the cooperation relationship of the four, the gas in the dispersion bin can be quickly discharged, the air pressure balance in the weight loss scale bin can be ensured, the weight loss scale can be stabilized, and the purpose of improving the blanking accuracy can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the weighing assembly of the weight loss scale of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions of the present utility model will be further described in detail below with reference to the drawings.

[0015] As Figure 1 shown, the weighing assembly of the weight loss scale of the present utility model includes a weight loss scale main body 1 provided with a weight loss scale weighing module 13 inside. The structure of the weight loss scale main body 1 is a known prior art. The difference is that in addition to a feed inlet 10, a weight loss scale breather cap 9 and an observation port 11 are also provided at the upper end of its bin body.

[0016] A conveying device is connected to the discharge port of the weight loss scale main body 1, including a first screw conveyor 6 and a second screw conveyor 7 both connected to the discharge port of the weight loss scale main body 1. The first screw conveyor 6 realizes the rough transmission function of the material, and the second screw conveyor 7 realizes the high-precision conveying of the material. The weighing module 13 obtains the total amount of the material in the weight loss scale main body 1 and the conveying device. The conveying device also includes a motor 8 with an independent drive for realizing the independent blanking function of the first screw conveyor 6 and the second screw conveyor 7, that is, for respectively adjusting the rotation speed of the first screw conveyor 6 and the second screw conveyor 7 and providing power. The motor 8 is arranged on one side close to the weight loss scale main body 1.

[0017] The weighing component of the weight reducing scale of the present utility model further includes a dispersion tank body 3 connected to the discharge ends of the first screw conveyor 6 and the second screw conveyor 7 through a pipeline 2. That is, the discharge ends of the first screw conveyor 6 and the second screw conveyor 7 are both communicated with the upper port of the pipeline 2. And crucially, an upper butterfly valve 4 and a lower butterfly valve 5 are respectively provided on the pipeline 2. Through the settings of the upper butterfly valve 4 and the lower butterfly valve 5, in cooperation with the first screw conveyor 6 and the second screw conveyor 7, the gas in the dispersion tank body 3 can be quickly discharged, ensuring the air pressure balance in the weight reducing scale body 1, stabilizing the weight reducing scale body 1, and achieving the purpose of improving the feeding accuracy. The upper end of the dispersion tank body 3 is communicated with the lower port of the pipeline 2, and a dispersion tank breather cap 12 is also provided at the upper end of the dispersion tank body 3.

[0018] Specifically, when the weighing system is working, the material enters the bin body of the weight reducing scale body 1 through the feed port for caching. The weight of the material in the weight reducing scale body 1 is obtained through the weight reducing scale weighing module 13. The air in the bin body of the weight reducing scale body 1 is discharged from the weight reducing scale breather cap 9. After the weight reducing scale body 1 is stabilized, the weight before batching is obtained.

[0019] After setting the lead of the first screw conveyor 6, the buffer value of the second screw conveyor 7, and the drop value of the second screw conveyor 7, the batching operation is started. The upper butterfly valve 4 and the lower butterfly valve 5 are opened. The material in the weight reducing scale body 1 is transferred to the dispersion tank body 1 through the first screw conveyor 6 and the second screw conveyor 7, and the material is transmitted through the upper weighing butterfly valve 4, the pipeline 2, and the lower butterfly valve 5.

[0020] During the process of material transmission, a large amount of gas in the dispersion tank body 3 enters the weight reducing scale body 1 through the pipeline 2, causing the air pressure in the weight reducing scale body 1 to be unstable. The aggregation and discharge of the gas affect the weight calculation of the weighing module 13.

[0021] Based on this, combined with the weighing component of the weight reducing scale of the present utility model, when the batching difference ≤ the buffer value, the second screw conveyor 7 stops working, the upper butterfly valve 4 and the lower butterfly valve 5 are closed, and after stabilizing for a period of time (such as 40 s), wait for the gas in the weight reducing scale body 1 to be discharged through the weight reducing scale breather cap 9 and the gas in the dispersion tank body 3 to be discharged through the dispersion tank breather cap 12, stabilize the weight calculation of the weighing module 13, and then the second screw conveyor 7 starts to run, and the upper butterfly valve 4 and the lower butterfly valve 5 are opened for continuous batching.

[0022] When the batching difference ≤ the set drop value, the second screw conveyor 7 stops working, the upper butterfly valve 4 is closed, and after stabilizing for a period of time (such as 5 s), the lower butterfly valve 5 is closed after a delay for a period of time (such as 40 s), and then the batching ends stably.

[0023] When the ingredient difference > the set drop value, the second screw conveyor 7 stops working, the upper butterfly valve 4 and the lower butterfly valve 5 close, and it stabilizes for a period of time (e.g., 10 s), waiting for the gas in the main body 1 of the weighing scale to pass through the breather cap 9 of the weighing scale, and the gas in the main body 3 of the dispersion tank to be discharged through the breather cap 12 of the dispersion tank, and stabilizing the weight calculation of the weighing module 13. Then the upper butterfly valve 4 opens, the second screw conveyor 7 starts running, the lower butterfly valve 5 opens, and the continuous batching operation continues until the ingredient difference ≤ the set drop value. Subsequently, the second screw conveyor 7 stops working, the upper butterfly valve 4 closes, and it stabilizes for a period of time (e.g., 5 s), and the lower butterfly valve 5 closes after a delay of a period of time (e.g., 40 s), and the batching ends after stabilization.

[0024] It should be noted that the demarcation set value in the process from rough processing to fine processing mentioned above in the present utility model; the buffer value is the value set at the beginning of exhaust and weight stabilization during the fine processing; the drop value is the error value between the allowable actual batching amount and the theoretically set amount; the lead is greater than the buffer value which is greater than the drop value. The ingredient difference is the difference between the target set value of the material quantity and the cumulative discharging value, and the cumulative discharging value is the difference between the initial weight before batching and the displayed value of the weighing scale.

[0025] That is, based on the structure of the weighing assembly of the weighing scale of the present utility model, by setting process parameters, based on the cooperation relationship of the first screw conveyor, the second screw conveyor, the upper butterfly valve and the lower butterfly valve, and by respectively arranging the breather cap of the dispersion tank and the breather cap of the weighing scale at the upper ends of the main body of the dispersion tank and the main body of the weighing scale, it can enable the gas in the dispersion bin to be quickly discharged, ensure the air pressure balance in the weighing scale bin, stabilize the weighing scale, and achieve the purpose of improving the batching accuracy.

Claims

1. A weighing component of a loss-in-weight weigher for improving weighing accuracy, characterized in that, The weighing component of the loss-in-weight weigher includes a loss-in-weight weigher main body (1) and a dispersion tank main body (3) connected to the loss-in-weight weigher main body (1) through a pipeline (2). An upper butterfly valve (4) and a lower butterfly valve (5) are respectively arranged on the pipeline (2) connecting the dispersion tank main body (3) and the loss-in-weight weigher main body (1). The lower discharge port of the loss-in-weight weigher main body (1) is communicated with the upper port of the pipeline (2) through a first screw conveyor (6) and a second screw conveyor (7).

2. The weight loss scale weighing component for improving weighing accuracy according to claim 1, characterized in that The feeding ends of the first screw conveyor (6) and the second screw conveyor (7) are both connected to the discharge port of the loss-in-weight weigher main body (1), and the discharge ends of the first screw conveyor (6) and the second screw conveyor (7) are both connected to the upper port of the pipeline (2).

3. The weight reduction scale weighing assembly for improving weighing accuracy according to claim 1, wherein A motor (8) is connected to one side of the first screw conveyor (6) close to the loss-in-weight weigher main body (1) for adjusting the rotation speed of the first screw conveyor (6) and providing power.

4. The weight loss scale weighing component for improving weighing accuracy according to claim 1, characterized in that, A motor (8) is connected to one side of the second screw conveyor (7) close to the loss-in-weight weigher main body (1) for adjusting the rotation speed of the second screw conveyor (7) and providing power.

5. The weighing assembly of the loss-in-weight scale for improving weighing accuracy according to claim 1, wherein, A loss-in-weight weigher breather cap (9), a feeding port (10) and an observation port (11) are respectively arranged at the upper end of the bin body of the loss-in-weight weigher main body (1).

6. The de-weighting scale weighing assembly for improving weighing accuracy according to claim 1, wherein, The upper end of the dispersion tank main body (3) is communicated with the lower port of the pipeline (2), and a dispersion tank breather cap (12) is further arranged at the upper end of the dispersion tank main body (3).

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