Feeding system of rolling mill

Abstract

The utility model provides a feeding system of a rolling mill, which is used for conveying raw materials to be milled in a raw material bin into the rolling mill and comprises a controller, a support frame, a weighing device and a metering bin with an inner cavity, the weighing device is arranged on the supporting frame, and the metering bin is arranged on the weighing device; the top end of the metering bin is provided with a feeding port, the bottom end of the metering bin is provided with a discharging port, the raw material bin is located above the metering bin, the bottom of the raw material bin is provided with a discharging port corresponding to the discharging port, the rolling mill is located below the metering bin, and the top of the rolling mill is provided with a feeding port corresponding to the discharging port. A first valve is arranged on the discharge outlet, and the weighing device and the first valve are both electrically connected with the controller. The amount of raw materials entering the rolling mill in unit time can be accurately controlled, the grinding effect can be guaranteed, and meanwhile the situation that the rolling mill is abraded due to the fact that the feeding amount in unit time is too large can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of titanium dioxide production, in particular to a feeding system of a roller mill. Background Art

[0002] In the production process of titanium dioxide, it is an important process step to transport raw materials with larger particles to the roller mill for grinding. In the prior art, raw materials with larger particles are discharged from the raw material bin and transported to the roller mill for grinding through an auger feeder. The problem is that the amount of raw materials entering the roller mill per unit time cannot be accurately measured, and the feeding amount of the roller mill is unstable, resulting in poor grinding effect and serious wear of the roller mill itself. Utility Model Content

[0003] The utility model aims to provide a feeding system for a roller mill, which can accurately control the amount of raw materials entering the roller mill per unit time, not only to ensure the grinding effect, but also to avoid wear on the roller mill itself due to excessive feed amount per unit time.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A feeding system for a roller mill is used to convey raw materials to be ground in a raw material bin to the roller mill, comprising: a controller, a support frame, a weighing device and a metering bin with an inner cavity;

[0006] The weighing device is arranged on the supporting frame, and the metering silo is arranged on the weighing device, so that the supporting frame supports the metering silo through the weighing device;

[0007] The top of the metering silo has an inlet for allowing external raw materials to be ground to enter the inner cavity, and the bottom has a discharge port for allowing the raw materials to be ground in the inner cavity to be discharged out of the inner cavity. The raw material silo is located above the metering silo, and its bottom has a discharge port corresponding to the discharge port, so that the raw materials to be ground in the raw material silo can be discharged from the discharge port and enter the metering silo through the inlet. The roller mill is located below the metering silo, and its top has a feed port corresponding to the discharge port, so that the raw materials to be ground in the metering silo can be discharged from the discharge port and enter the roller mill through the feed port.

[0008] A first valve is provided on the discharge port, and the weighing device and the first valve are both electrically connected to the controller. The weighing device collects weight information of the metering silo in real time and sends it to the controller, and the controller controls the operation of the first valve according to the weight information of the metering silo.

[0009] Preferably, a second valve is provided on the discharge port, and the second valve is electrically connected to the controller, and the controller operates the second valve according to weight information of the metering silo.

[0010] Preferably, it also includes a first unloading device;

[0011] The first unloading device is fixedly installed at one end of the first valve away from the raw material bin, so that the raw materials to be ground discharged from the raw material bin can be input into the metering bin through the first unloading device.

[0012] Preferably, the first unloading device is a fixed-frequency star-shaped unloader.

[0013] Preferably, it further comprises a second unloading device;

[0014] The second unloading device is fixedly mounted on the feed port, so that the raw materials to be ground discharged from the metering bin can enter the roller mill through the second unloading device.

[0015] Preferably, the second unloading device is a variable frequency star-shaped unloader.

[0016] Preferably, the inner cavity includes an upper cavity and a lower cavity which are arranged in sequence from top to bottom and connected to each other. The upper cavity is in the shape of a cylinder with an axis extending in the vertical direction, and the lower cavity is in the shape of a truncated cone with an axis that coincides with the axis of the upper cavity and tapers downward.

[0017] Preferably, the cone angle of the lower cavity is α, and 30°≤α≤40°.

[0018] Preferably, the surface roughness of the inner wall of the upper cavity is Ra1.6 to Ra3.2;

[0019] And / or, the surface roughness of the inner wall of the lower cavity is Ra1.6 to Ra3.2.

[0020] The feeding system of the roller mill of the utility model adopts a technical scheme in which a first valve is arranged on the discharge port, the weighing device and the first valve are electrically connected to the controller, the weighing device collects weight information of the metering silo in real time and sends it to the controller, and the controller controls the operation of the first valve according to the weight information of the metering silo. The system can accurately control the amount of raw materials entering the roller mill per unit time, which can not only ensure the grinding effect, but also avoid wear on the roller mill itself due to excessive feed amount per unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of an embodiment of a feeding system of a roller mill according to the utility model.

[0022] In the figure: 1-raw material bin; 2-roller mill; 3-controller; 4-support frame; 5-weighing device; 6-inner cavity; 7-metering bin; 8-feeding port; 9-discharge port; 10-discharge port; 11-feeding port; 12-first valve; 13-second valve; 14-first discharger; 15-second discharger; 16-upper cavity; 17-lower cavity. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the feed system of the roller mill of the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] like Figure 1 As shown, a feeding system for a roller mill is used to convey the raw materials to be ground in the raw material bin 1 to the roller mill 2, and includes: a controller 3, a support frame 4, a weighing device 5 and a metering bin 7 with an inner cavity 6. The weighing device 5 is arranged on the support frame 4, and the metering bin 7 is arranged on the weighing device 5, so that the support frame 4 supports the metering bin 7 through the weighing device 5. The top of the metering silo 7 has an inlet 8 for allowing the external raw materials to be ground to enter the inner cavity 6, and the bottom has a discharge port 9 for allowing the raw materials to be ground in the inner cavity 6 to be discharged outside the inner cavity 6. The raw material silo 1 is located above the metering silo 7, and its bottom has a discharge port 10 corresponding to the discharge port 9, so that the raw materials to be ground in the raw material silo 1 can be discharged from the discharge port 10 and enter the metering silo 7 through the inlet 8. The roller mill 2 is located below the metering silo 7, and its top has a feed port 11 corresponding to the discharge port 9, so that the raw materials to be ground in the metering silo 7 can be discharged from the discharge port 9 and enter the roller mill 2 through the feed port 11. A first valve 12 is provided on the discharge port 10, and the weighing device 5 and the first valve 12 are both electrically connected to the controller 3. The weighing device 5 collects the weight information of the metering silo 7 in real time and sends it to the controller 3. The controller 3 controls the operation of the first valve 12 according to the weight information of the metering silo 7.

[0025] In actual use, when the first valve 12 is opened, the raw material to be ground (such as granular titanium dioxide) in the raw material bin 1 is discharged from the discharge port 10, and enters the metering bin 7 through the feed port 8, and then is transported toward the roller mill 2 through the discharge port 9. When the weight of the metering bin 7 collected by the weighing device 5 (referring to the sum of the weight of the metering bin 7 body and the raw material to be ground located in the metering bin 7) reaches the set value, the controller 3 controls the first valve 12 to close, so that the raw material to be ground in the raw material bin 1 is no longer transported to the metering bin 7. Then, the amount of raw material to be ground transported from the metering bin 7 to the roller mill 2 per unit time is controlled, which can not only ensure the grinding effect, but also avoid the wear of the roller mill 2 itself due to excessive feed amount per unit time.

[0026] Furthermore, if Figure 1 As shown, a second valve 13 is provided on the discharge port 9, and the second valve 13 is electrically connected to the controller 3. The controller 3 operates the second valve 13 according to the weight information of the metering bin 7. In actual work, when the metering bin 7 conveys the raw material to be ground toward the roller mill 2, the second valve 13 is in an open state. When the controller 3 receives that the weight reduction of the metering bin 7 per unit time exceeds the set value, the controller 3 controls the second valve 13 to reduce the opening amount, thereby avoiding excessive feeding amount of the roller mill 2 per unit time, and further controlling the feeding amount of the roller mill 2 per unit time more accurately.

[0027] Preferably, if Figure 1 As shown, the first discharge device 14 is also included. The first discharge device 14 is fixedly installed at one end of the first valve 12 away from the raw material bin 1, so that the raw materials to be ground discharged from the raw material bin 1 can be input into the metering bin 7 through the first discharge device 14. The first discharge device 14 can be a fixed-frequency star-shaped discharger. With such a technical solution, the raw materials to be ground discharged from the raw material bin 1 can be evenly and stably input into the metering bin 7, avoiding the impact on the metering bin 7 due to the instantaneous excessive amount of raw materials to be ground discharged from the raw material bin 1.

[0028] Preferably, Figure 1 As shown, the second unloading device 15 is also included, and the second unloading device 15 is fixedly installed on the feed port 11, so that the raw materials to be ground discharged from the metering bin 7 can enter the roller mill 2 through the second unloading device 15. The second unloading device 15 can be a variable frequency star-shaped unloader. In actual work, the unloading speed of the second unloading device 15 can be adjusted according to specific needs, so as to more accurately control the speed at which the raw materials to be ground enter the roller mill 2.

[0029] As an implementation method, the inner cavity 6 includes an upper cavity 16 and a lower cavity 17 which are arranged in sequence from top to bottom and are interconnected. The upper cavity 16 is in the shape of a cylinder with an axis extending in the vertical direction, and the lower cavity 17 is in the shape of a truncated cone with an axis that coincides with the axis of the upper cavity 16 and tapers downward. The cone angle of the lower cavity 17 is α, and 30°≤α≤40°. In this way, the raw material to be ground in the inner cavity 6 can move smoothly toward the discharge port 9, thereby preventing it from accumulating in the inner cavity 6.

[0030] Furthermore, the surface roughness of the inner wall of the upper cavity 16 is Ra1.6 to Ra3.2, which can reduce the friction coefficient between the raw material to be ground and the inner wall of the upper cavity 16, thereby preventing the raw material to be ground from accumulating on the inner wall of the upper cavity 16. And / or, the surface roughness of the inner wall of the lower cavity 17 is Ra1.6 to Ra3.2, which can reduce the friction coefficient between the raw material to be ground and the inner wall of the lower cavity 17, thereby preventing the raw material to be ground from accumulating on the inner wall of the lower cavity 17.

[0031] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A feeding system for a roller mill, for conveying raw materials to be ground in a raw material bin (1) to the roller mill (2), characterized in that: include: A controller (3), a support frame (4), a weighing device (5) and a metering silo (7) having an inner cavity (6); The weighing device (5) is arranged on the supporting frame (4), and the metering silo (7) is arranged on the weighing device (5), so that the supporting frame (4) supports the metering silo (7) through the weighing device (5); The top of the metering silo (7) has an inlet (8) for allowing external raw materials to be ground to enter the inner cavity (6), and the bottom has a discharge port (9) for allowing the raw materials to be ground in the inner cavity (6) to be discharged outside the inner cavity (6); the raw material silo (1) is located above the metering silo (7), and its bottom has a discharge port (10) corresponding to the discharge port (9), so that the raw materials to be ground in the raw material silo (1) can be discharged from the discharge port (10) and enter the metering silo (7) through the inlet (8); the roller mill (2) is located below the metering silo (7), and its top has a feed port (11) corresponding to the discharge port (9), so that the raw materials to be ground in the metering silo (7) can be discharged from the discharge port (9) and enter the roller mill (2) through the feed port (11); A first valve (12) is provided on the discharge port (10); the weighing device (5) and the first valve (12) are both electrically connected to the controller (3); the weighing device (5) collects weight information of the metering silo (7) in real time and sends it to the controller (3); and the controller (3) controls the operation of the first valve (12) according to the weight information of the metering silo (7).

2. The feeding system of the roller mill according to claim 1, characterized in that: A second valve (13) is provided on the discharge port (9), and the second valve (13) is electrically connected to the controller (3). The controller (3) operates the second valve (13) according to the weight information of the metering silo (7).

3. The feeding system of the roller mill according to claim 1 or 2, characterized in that: It also includes a first unloading device (14); The first discharge device (14) is fixedly mounted on an end of the first valve (12) away from the raw material bin (1), so that the raw material to be ground discharged from the raw material bin (1) can be input into the metering bin (7) through the first discharge device (14).

4. The feeding system of the roller mill according to claim 3, characterized in that: The first unloading device (14) is a fixed-frequency star-shaped unloader.

5. The feeding system of the roller mill according to claim 3, characterized in that: Also includes a second unloading device (15); The second discharge device (15) is fixedly mounted on the feed port (11) so that the raw material to be ground discharged from the metering bin (7) can enter the roller mill (2) through the second discharge device (15).

6. The feeding system of the roller mill according to claim 5, characterized in that: The second unloading device (15) is a variable frequency star-shaped unloader.

7. The feeding system of the roller mill according to claim 1 or 2, characterized in that: The inner cavity (6) comprises an upper cavity (16) and a lower cavity (17) which are arranged in sequence from top to bottom and are interconnected. The upper cavity (16) is in the shape of a cylinder with an axis extending in a vertical direction, and the lower cavity (17) is in the shape of a truncated cone with an axis that coincides with the axis of the upper cavity (16) and tapers downward.

8. The feeding system of the roller mill according to claim 7, characterized in that: The cone angle of the lower cavity (17) is α, and 30°≤α≤40°.

9. The feeding system of the roller mill according to claim 7, characterized in that: The surface roughness of the inner wall of the upper cavity (16) is Ra1.6 to Ra3.2; And / or, the surface roughness of the inner wall of the lower cavity (17) is Ra1.6 to Ra3.2.

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