Multistage sanding system for suspending agent

Abstract

The invention provides a suspending agent multi-stage sanding system which comprises a first intermediate storage tank connected to an emulsification pump, a first electric diaphragm pump connected to the first intermediate storage tank, and the first electric diaphragm pump can adjust the feeding speed in real time based on an instruction of a control system; the first sand mill is connected to the first electric diaphragm pump, the first sand mill can adjust the sand milling speed in real time based on an instruction of the control system, and a temperature sensor is arranged at an outlet of the first sand mill; the second intermediate storage tank is connected to the first sand mill and is provided with a liquid level sensor; and the control system is used for adjusting the feeding speed of the first electric diaphragm pump and the sanding speed of the first sand mill in real time based on data detected by the temperature sensor. According to the system, the self-adaptive adjustment of the suspending agent sanding process can be realized, so that the sanding speed, the material speed and the temperature are reasonably and adaptively matched, the particle size of the sanding material is accurately controlled, and the process quality risk is greatly reduced.

Description

Technical Field

[0001] The invention mainly relates to the technical field related to suspension agent sand milling, in particular to a suspension agent multi-stage sand milling system. Background Art

[0002] The sand milling of suspensions is involved in the processing and production of agrochemicals, food, and medicines. Generally, a pneumatic diaphragm pump is used in conjunction with a sand mill to achieve the sand milling process. The pneumatic diaphragm pump is used to transport materials, and the sand mill is used for sand milling.

[0003] In the current existing technology, the main problems of the sand milling system of the suspension are: the sand milling system adopts a single single-stage sand mill or a multi-stage sand mill, which cannot be converted according to the actual use situation; the sand mill is prone to idling during the sand milling process; the sand milling feed speed and the sand milling host speed are two important factors that determine the particle size of the material. The higher the sand milling host speed and the slower the sand milling speed, the smaller the material particles will be. However, unlimitedly increasing the sand mill speed and reducing the sand milling speed will cause the material temperature to be too high, affecting the product performance. Summary of the invention

[0004] In order to solve the shortcomings of the current technology, the present invention combines the existing technology and provides a multi-stage sand grinding system for suspension agent from the perspective of practical application. The system can realize adaptive adjustment of the suspension sand grinding process, so that a reasonable adaptive matching is achieved between the sand grinding speed, material speed and temperature, thereby making the particle size of the sand grinding material accurately controllable and greatly reducing the process quality risk.

[0005] The technical solution of the present invention is as follows: A suspension agent multi-stage sand milling system, comprising: Emulsification pump, used to achieve pre-shearing of the raw material to be sand-milled; The first intermediate storage tank is connected to the emulsification pump and is equipped with a liquid level sensor. When the liquid level is high, the emulsification pump can be shut down based on the control system command; A first electric diaphragm pump is connected to the first intermediate storage tank, and the first electric diaphragm pump can adjust the feeding speed in real time based on the control system instruction; A first sand mill is connected to a first electric diaphragm pump, the first sand mill can adjust the sand milling speed in real time based on the control system command, and a temperature sensor is arranged at the outlet of the first sand mill; The second intermediate storage tank is connected to the first sand mill and is equipped with a liquid level sensor; The control system is configured to adjust the feeding speed of the first electric diaphragm pump and the sanding speed of the first sand mill in real time based on the detection data of the temperature sensor.

[0006] Furthermore, the control system compares the data detected by the temperature sensor with a set temperature threshold, and adjusts the feeding speed of the first electric diaphragm pump and the sanding speed of the first sand mill in real time based on the comparison result.

[0007] Further, the temperature threshold includes a maximum temperature value and a minimum temperature value; When the temperature detected by the temperature sensor is higher than the maximum temperature value, the control system first reduces the feeding speed of the first electric diaphragm pump, and then reduces the sanding speed of the first sand mill after a delay setting time until the temperature drops below the maximum temperature value; When the temperature detected by the temperature sensor reaches the minimum temperature value, the control system first increases the sanding speed of the first sand mill, and after a delay setting time, increases the feeding speed of the first electric diaphragm pump to the maximum set flow rate of the diaphragm pump. On the premise that the detected temperature does not exceed the maximum temperature value, the sanding speed of the first sand mill is increased to the maximum set speed of the sand mill.

[0008] Furthermore, the maximum temperature value is set to 30°, the minimum temperature value is set to 20°, and the maximum setting speed of the sand mill is 1500 r / min.

[0009] Further, when the temperature detected by the temperature sensor is higher than 30°, the control system first reduces the feeding speed of the first electric diaphragm pump by 1L / min, and after a delay setting time, reduces the sanding speed of the first sand mill by 100r / min until the temperature drops below 30°; When the temperature detected by the temperature sensor reaches 20°, the control system first increases the sanding speed of the first sand mill by 100r / min, and then increases the feeding speed of the first electric diaphragm pump after a delay of 5 minutes until the instantaneous flow rate of the first electric diaphragm pump reaches 25L / min. On the premise that the detected temperature does not exceed 30°, the sanding speed of the first sand mill is increased to 1500r / min.

[0010] Further, the system also includes a second electric diaphragm pump, a second sand mill and a third intermediate storage tank; The second electric diaphragm pump can be connected to the first intermediate storage tank or the second intermediate storage tank through valve control, the second sand mill is connected to the second electric diaphragm pump, the third intermediate storage tank is connected to the second sand mill, the second sand mill outlet is equipped with a temperature sensor, the third intermediate storage tank is equipped with a liquid level sensor, the control system controls the operation of the second electric diaphragm pump and the second sand mill based on the detection data of the temperature sensor, and the control method is the same as that of the first electric diaphragm pump and the first sand mill.

[0011] Furthermore, the system includes a single-machine sanding mode and a two-stage sanding mode. In the single-machine sanding mode, the second electric diaphragm pump is connected to the first intermediate storage tank. In the two-stage sanding mode, the second electric diaphragm pump is connected to the second intermediate storage tank.

[0012] Furthermore, open filters are provided in the first intermediate storage tank, the second intermediate storage tank and the third intermediate storage tank.

[0013] Beneficial effects of the present invention: 1. The sand milling system structure design of the present invention is that the control system can control the sand milling speed of the sand mill main machine and the feeding speed of the diaphragm pump according to the feedback of the material temperature signal after the sand mill, so that a closed-loop feedback match can be formed between the temperature, the sand mill speed and the diaphragm pump, so that the sand milling particle size can be controlled, and the sand milling temperature is strictly controlled not to exceed the set range, and the idling of the sand mill can be reduced, thereby improving the sand milling efficiency.

[0014] 2. The intermediate storage tank provided in the present invention can monitor the sand milling situation in real time, ensure that the sand mill does not run idle, further improve production efficiency, and reduce energy waste. The intermediate storage tank adopts an open filter to facilitate the cleaning of the filter.

[0015] 3. The present invention can realize the conversion between single-stage sanding and multi-stage sanding by regulating the valve. During the single-stage sanding process, two sets of sanding equipment can work synchronously in parallel. During the multi-stage sanding process, two sets of sanding equipment can work in series. Therefore, the sanding mode of the system can be quickly changed according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the system structure of the present invention.

[0017] Figure 2 The control interface of the system of the present invention is shown in FIG. Figure 1 .

[0018] Figure 3 The control interface of the system of the present invention is shown in FIG. Figure 2 .

[0019] Numbers shown in the accompanying drawings: 1. emulsification pump; 2. first intermediate storage tank; 3. liquid level sensor; 4. first electric diaphragm pump; 5. control system; 6. first sand mill; 7. temperature sensor; 8. second intermediate storage tank; 9. second electric diaphragm pump; 10. second sand mill; 11. third intermediate storage tank. DETAILED DESCRIPTION

[0020] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application. Example

[0021] This embodiment provides a suspension agent single-stage sand milling system. Figure 1As shown, the sand milling system of this embodiment mainly includes an emulsifying pump 1, a first intermediate storage tank 2, a first electric diaphragm pump 4, a first sand mill 6, a second intermediate storage tank 8, a second electric diaphragm pump 9, a second sand mill 10, a third intermediate storage tank 11 and a control system 5.

[0022] Among them, the emulsification pump 1 is mainly used for pre-shearing of materials. The suspension material is input into the emulsification pump 1 for pre-shearing, which can make the materials better mixed and solve the problem of powdered materials agglomerating in oily liquids and clogging filters.

[0023] A first intermediate storage tank 2 is arranged behind the emulsification pump 1, and the first intermediate storage tank 2 is equipped with a liquid level sensor 3. The signal of the liquid level sensor 3 is connected to the control system 5. The material situation in the storage tank can be monitored in real time through the liquid level sensor 3. When the material is at a high liquid level, the emulsification pump 1 can be controlled to be shut down through the control system 5 to avoid overflow of the material. When the material in the storage tank is at a low liquid level, the sand mill can be controlled to be shut down to avoid idling of the sand mill.

[0024] A first electric diaphragm pump 4 and a second electric diaphragm pump 9 are arranged behind the first intermediate storage tank 2. The first electric diaphragm pump 4 and the second electric diaphragm pump 9 are arranged in parallel. The first electric diaphragm pump 4 and the second electric diaphragm pump 9 are controlled by a control system 5, that is, the control system 5 can adjust the flow rate of the material conveyed by the diaphragm pump by controlling the operation of the first electric diaphragm pump 4 and the second electric diaphragm pump 9. A first sand mill 6 is arranged behind the first sand mill 6, a second intermediate storage tank 8 is arranged behind the second electric diaphragm pump 9, a second sand mill 10 is arranged behind the second electric diaphragm pump 9, and a third intermediate storage tank 11 is arranged behind the second sand mill 10. In this embodiment, an electric diaphragm pump is used instead of a pneumatic diaphragm pump to achieve precise flow control and remote signal transmission. The system flow can be precisely controlled by software, replacing the traditional manual flow adjustment based on subjective experience on site.

[0025] In this embodiment, the first intermediate storage tank 2, the second intermediate storage tank 8, and the third intermediate storage tank 11 all adopt open filters, specifically basket filters, that is, the filter adopts a basket-like structure, and the basket filter placed in the intermediate storage tank replaces the small closed filter originally installed on the intermediate storage tank. The filtration efficiency is higher, and the filter blockage situation is intuitive and clear at a glance. The filter can be cleaned at any time without stopping the machine, thereby realizing continuous production and improving production efficiency.

[0026] In this embodiment, the pipe at the outlet of the first sand mill 6 and the pipe at the outlet of the second sand mill 10 are both equipped with a temperature sensor 7, and the temperature sensor 7 is used to detect the temperature of the material in the pipe. Further, the temperature sensor 7 and the first sand mill 6 and the second sand mill 10 are all connected to the control system 5, and the control system 5 controls the sanding speed of the first sand mill 6 and the second sand mill 10 according to the temperature signal detected by the temperature sensor 7.

[0027] In this embodiment, the control system 5 adopts a closed-loop control method, which can ensure that the material temperature does not exceed the set temperature and the performance of the diaphragm pump and the sand mill is used to the maximum extent. The control system 5 controls the first electric diaphragm pump 4 and the first sand mill 6 in the same way as the second electric diaphragm pump 9 and the second sand mill 10. This embodiment is described by taking the first electric diaphragm pump 4 and the first sand mill 6 as an example.

[0028] The sanding process is a complex dynamic balance process. By controlling the outlet temperature of the sand mill material, the main machine speed of the sand mill, and the instantaneous flow rate of the diaphragm pump, a product with a qualified particle size is finally obtained; on the premise of ensuring that the temperature does not exceed the set threshold, the sand mill speed is as close to the maximum speed as possible. Under this premise, the feed speed is controlled by controlling the electric diaphragm pump according to the material characteristics, and the sanding speed is controlled by controlling the sand mill. Specifically, the control system 5 compares the data detected by the temperature sensor 7 with the set temperature threshold value, and the set temperature threshold value includes the highest temperature value and the lowest temperature value. Based on the comparison result, the feeding speed of the first electric diaphragm pump 4 and the sanding speed of the first sand mill 6 are adjusted in real time. When the temperature detected by the temperature sensor 7 is higher than the maximum temperature value, the control system 5 first reduces the feeding speed of the first electric diaphragm pump 4, and then reduces the sanding speed of the first sand mill 6 after a certain delay until the temperature drops below the maximum temperature value. When the temperature detected by the temperature sensor 7 reaches the minimum temperature value, the control system 5 first increases the sanding speed of the first sand mill 6, and increases the feeding speed of the first electric diaphragm pump 4 to the maximum set flow of the diaphragm pump after a delay setting time. On the premise that the detected temperature does not exceed the maximum temperature value, the sanding speed of the first sand mill 6 is increased to the maximum set speed of the sand mill. The above method can be used to fully automatically complete sanding, so that the particle size of the sanded material can be accurately controlled, which greatly reduces the process quality risk and improves the equipment utilization efficiency.

[0029] In a specific implementation provided in this embodiment, the applicant has obtained the best matching parameters of temperature, sand mill, and electric diaphragm pump through a lot of creative labor. Specifically as follows: The control premise is that the sand mill speed is as close to 1500r / min as possible under the premise of ensuring that the temperature does not exceed 30°C. The specific control method is: when the temperature sensor 7 detects that the temperature is higher than 30°, the control system 5 first reduces the feeding speed of the first electric diaphragm pump 4 by 1L / min, and after the delay setting time, reduces the sanding speed of the first sand mill 6 by 100r / min until the temperature drops below 30°. When the temperature sensor 7 detects that the temperature reaches 20°, the control system 5 first increases the sanding speed of the first sand mill 6 by 100r / min, and increases the feeding speed of the first electric diaphragm pump 4 after a delay of 5min until the instantaneous flow of the first electric diaphragm pump 4 reaches 25L / min. Under the premise that the detected temperature does not exceed 30°, the sanding speed of the first sand mill 6 is increased to 1500r / min.

[0030] Through the above process of this embodiment, while ensuring product quality, no human intervention is required throughout the process. As long as the sanding parameters of the corresponding product are input, the sanding can be completed automatically, and the particle size of the sanded material can be accurately controlled, which greatly reduces the process quality risk and improves the equipment utilization efficiency. The control system designed according to the above process has an interface as shown in FIG. Figure 2 as well as Figure 3 shown. Example

[0031] This embodiment provides a suspension agent two-stage sand milling system. Figure 1 As shown, the sand milling system of this embodiment mainly includes an emulsifying pump 1, a first intermediate storage tank 2, a first electric diaphragm pump 4, a first sand mill 6, a second intermediate storage tank 8, a second electric diaphragm pump 9, a second sand mill 10, a third intermediate storage tank 11 and a control system 5. The difference from Example 1 is that in this embodiment, the second electric diaphragm pump 9 and the first electric diaphragm pump 4 are connected in series, that is, the second electric diaphragm pump 9 is connected to the second intermediate storage tank 8, so that the material is sanded in the first stage through the first sand mill 6, and then enters the second sand mill 10 for secondary sand milling, and the sand milling effect of the material is improved by multi-stage sand milling. In this embodiment, the control of the electric diaphragm pump and the sand mill is the same as that in Example 1 and will not be described here.

[0032] This embodiment and embodiment 1 are implemented using the same system. The system can be made into a single-stage sanding system or a two-stage sanding system simply by controlling the valve. The operation is simple, and the user can make a selection according to the actual situation.

Claims

1. A suspension agent multi-stage sand milling system, characterized in that: include: Emulsification pump, used to achieve pre-shearing of the raw material to be sand-milled; The first intermediate storage tank is connected to the emulsification pump and is equipped with a liquid level sensor. When the liquid level is high, the emulsification pump can be shut down based on the control system command; A first electric diaphragm pump is connected to the first intermediate storage tank, and the first electric diaphragm pump can adjust the feeding speed in real time based on the control system instruction; A first sand mill is connected to a first electric diaphragm pump, the first sand mill can adjust the sand milling speed in real time based on the control system command, and a temperature sensor is provided at the outlet of the first sand mill; The second intermediate storage tank is connected to the first sand mill and is equipped with a liquid level sensor; The control system is configured to adjust the feeding speed of the first electric diaphragm pump and the sanding speed of the first sand mill in real time based on the detection data of the temperature sensor.

2. The suspension multi-stage sand milling system according to claim 1, characterized in that: The control system compares the data detected by the temperature sensor with a set temperature threshold, and adjusts the feeding speed of the first electric diaphragm pump and the sanding speed of the first sand mill in real time based on the comparison result.

3. The suspension multi-stage sand milling system according to claim 2, characterized in that: The temperature threshold includes a maximum temperature value and a minimum temperature value; When the temperature detected by the temperature sensor is higher than the maximum temperature value, the control system first reduces the feeding speed of the first electric diaphragm pump, and then reduces the sanding speed of the first sand mill after a delay setting time until the temperature drops below the maximum temperature value; When the temperature detected by the temperature sensor reaches the minimum temperature value, the control system first increases the sanding speed of the first sand mill, and after a delay setting time, increases the feeding speed of the first electric diaphragm pump to the maximum set flow rate of the diaphragm pump. On the premise that the detected temperature does not exceed the maximum temperature value, the sanding speed of the first sand mill is increased to the maximum set speed of the sand mill.

4. The suspension multi-stage sand milling system according to claim 3, characterized in that: The maximum temperature value is set to 30°, the minimum temperature value is set to 20°, and the maximum setting speed of the sand mill is 1500r / min.

5. The suspension multi-stage sand milling system according to claim 4, characterized in that: When the temperature detected by the temperature sensor is higher than 30°, the control system first reduces the feeding speed of the first electric diaphragm pump by 1L / min, and then reduces the sanding speed of the first sand mill by 100r / min after a delay setting time until the temperature drops below 30°; When the temperature detected by the temperature sensor reaches 20°, the control system first increases the sanding speed of the first sand mill by 100r / min, and then increases the feeding speed of the first electric diaphragm pump after a delay of 5 minutes until the instantaneous flow rate of the first electric diaphragm pump reaches 25L / min. On the premise that the detected temperature does not exceed 30°, the sanding speed of the first sand mill is increased to 1500r / min.

6. The suspension multi-stage sand milling system according to any one of claims 1 to 5, characterized in that: The system also includes a second electric diaphragm pump, a second sand mill and a third intermediate storage tank; The second electric diaphragm pump can be connected to the first intermediate storage tank or the second intermediate storage tank through valve control, the second sand mill is connected to the second electric diaphragm pump, the third intermediate storage tank is connected to the second sand mill, the second sand mill outlet is equipped with a temperature sensor, the third intermediate storage tank is equipped with a liquid level sensor, the control system controls the operation of the second electric diaphragm pump and the second sand mill based on the detection data of the temperature sensor, and the control method is the same as that of the first electric diaphragm pump and the first sand mill.

7. The suspension multi-stage sand milling system according to claim 6, characterized in that: The system includes a single-machine sanding mode and a two-stage sanding mode. In the single-machine sanding mode, the second electric diaphragm pump is connected to the first intermediate storage tank. In the two-stage sanding mode, the second electric diaphragm pump is connected to the second intermediate storage tank.

8. The suspension multi-stage sand milling system according to claim 6, characterized in that: The first intermediate storage tank, the second intermediate storage tank and the third intermediate storage tank are all provided with open filters.

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