Flour mill capable of preventing coarse powder from running

Abstract

The utility model discloses a flour mill capable of preventing coarse grains from running, which comprises a flour mill main body internally provided with a flour milling mechanism; the air blowing assembly comprises an air blower which is connected with the flour mill main body, an air inlet of the air blower is provided with an electric valve, when the air blower is started, the electric valve is slowly opened along with the current of the flour mill main body from small to large, and when the air blower is stopped, the electric valve is immediately closed; the feeding device is used for automatically conveying a to-be-processed product to the flour mill main body; and the discharging device is connected with the flour mill main body and is used for discharging materials. The utility model has the beneficial effects that the phenomenon of coarse grain runaway caused by overlarge wind power in the starting and stopping processes is prevented, and the production quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding mills, in particular to a grinding mill that prevents coarse powder from escaping. Background Art

[0002] When the pendulum mill processes non-metallic powders, the powder coarsening phenomenon often occurs, resulting in the powder fineness failing to meet the requirements. In addition to the design and manufacture of mechanical equipment, there are many other factors that cause the powder to coarse: for example, when the fan air pressure and air volume change greatly during startup and shutdown, it affects the classification accuracy and causes the powder to coarse. The pendulum mills currently on the market only achieve their purpose by increasing the rotor speed of the classifier, so the equipment has low output and high power consumption. For example, the authorized utility model patent CN 204448163 U discloses a hanging roller mill with a double-layer air inlet channel. The airflow divided by the interlayer formed between the middle body and the diverter hood can impact and disperse the agglomerated powder thrown to the cylinder wall by the powder selector, and then send it to the powder selector for secondary powder selection to reduce the phenomenon of coarsening. This setting changes the phenomenon of reducing coarsening during the processing process, but some coarse products are still discharged from the mill when the machine is just started and stopped. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a grinding machine with anti-coarseness running, which can effectively reduce the coarseness running phenomenon in the grinding process and improve the production quality.

[0004] Specifically, the utility model discloses a milling machine for preventing coarse powder from escaping, comprising:

[0005] The main body of the grinding machine has a grinding mechanism arranged inside;

[0006] A blowing assembly, including a blower connected to the main body of the grinding mill, wherein an electric valve is provided at the air inlet of the blower, and when starting, the electric valve is slowly opened as the current of the main body of the grinding mill increases from small to large, and when stopping, the electric valve is immediately closed;

[0007] The feeding device automatically transfers the product to be processed to the main body of the mill;

[0008] A discharging device is connected to the grinding mill body and is used for discharging materials.

[0009] The benefit of adopting the above technical solution is that it prevents the roughness caused by excessive wind force during the start-up and stop processes, thereby improving production quality.

[0010] Furthermore, the blower is connected to an air inlet pipe, and the electric valve is arranged on the air inlet pipe, comprising: an electric actuator, a valve stem, a valve plate and a mounting part, the mounting part is connected to the air inlet pipe, the valve plate is arranged in the mounting part, the valve plate is connected to the valve stem, and the electric actuator drives the valve plate to rotate.

[0011] The benefit of adopting the above technical solution is that the electric valve is automatically controlled. As the main grinding machine is turned on, the valve is gradually opened to control the air volume entering the grinding machine body to avoid coarse air leakage. When the grinding machine body is closed, the electric valve is immediately closed, which can also prevent unground products from entering the discharging device.

[0012] Furthermore, the discharging device includes: a discharging pipe, a cyclone collector is arranged on the upper part of the discharging pipe, the cyclone collector is connected to a return air pipe, and the return air pipe is connected to the air inlet of the blower.

[0013] The advantage of adopting the above technical solution is that the cyclone collector separates dust and exhaust gas through rotating airflow and centrifugal force. The gas of the ground product enters the cyclone collector, and then under the action of the rotating airflow, the solid particles are separated, and the clean gas enters the return air duct and continues to enter the main body of the mill. It has a simple structure, convenient maintenance, and good separation effect.

[0014] Furthermore, two discharge ports are provided at the bottom of the discharge pipe, and the discharge ports are provided with finished product unloading valves.

[0015] The benefit of adopting the above technical solution is that the setting of the finished product discharge valve can control the speed and position of the discharge, thereby achieving rapid discharge.

[0016] Furthermore, the grinding mill body is connected with a surplus air duct, and the surplus air duct is connected with a dust collector.

[0017] The advantage of adopting the above technical solution is that the excess air in the grinding machine body is discharged from the excess air duct and discharged after being dusted by a vacuum cleaner, which can effectively reduce pollution to the environment.

[0018] Furthermore, the feeding device includes a crusher and an elevator, a transmission cylinder is arranged on the upper side of the elevator, and the transmission cylinder is connected to the grinding mill body.

[0019] The benefit of adopting the above technical solution is that the crusher is set to firstly crush the product to be ground, and then automatically load it through the elevator, which improves the grinding efficiency, reduces the wear of the grinding roller and grinding ring, extends the service life of the grinding roller, and improves the grinding accuracy.

[0020] Furthermore, a classifier is arranged on the upper side of the grinding mill body, and a classifier rotor is arranged inside the classifier.

[0021] The benefit of adopting the above technical solution is that the classifier plays a screening role in the grinding process. Fine powder that meets the conditions passes through the classifier and enters the discharging device for discharge, while the unsatisfactory powder falls back into the grinding mill for further grinding.

[0022] Furthermore, the cyclone collector is a double cyclone collector.

[0023] The benefit of adopting the above technical solution is that it reduces the loss of materials during the separation process and improves the separation efficiency and collection purity of the sample.

[0024] Furthermore, a driving member, a scraper frame, a large base, a grinding roller and a grinding ring are arranged in the main body of the grinding mill.

[0025] The benefit of adopting the above technical solution is that the grinding roller and the grinding ring cooperate to grind the product, thereby ensuring the grinding effect of the product.

[0026] Furthermore, the large base is provided with a slag discharge hole.

[0027] The benefit of adopting the above technical solution is that the slag discharge hole can discharge the hard slag that cannot be ground from the bottom, avoiding the hard slag from wearing the grinding roller and grinding ring, and extending the service life of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0029] Figure 1 This is a schematic diagram of the overall structure of the utility model anti-coarse grinding machine

[0030] Figure 2 It is a schematic diagram of the structure of the electric valve of the utility model.

[0031] The reference numerals in the accompanying drawings are as follows:

[0032] The grinding mill body 1; the classifier 11; the classifier rotor 12; the large base 13; the grinding roller 14; the grinding ring 15; the slag discharge hole 16; the blower 2; the air inlet pipe 21; the electric valve 3; the electric actuator 31; the valve stem 32; the valve plate 33; the mounting part 34; the discharge pipe 4; the discharge port 41; the finished product discharge valve 42; the cyclone collector 5; the return air pipe 6; the residual air pipe 7; the dust collector 71; the crusher 8; and the elevator 81. DETAILED DESCRIPTION

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0034] like Figure 1-2 As shown, the utility model discloses a milling machine to prevent coarse powder from running away, comprising:

[0035] The main body 1 of the mill has a milling mechanism disposed therein;

[0036] The blowing assembly includes a blower 2 connected to the grinding mill body 1, and an electric valve 3 is provided at the air inlet of the blower 2. When starting, the electric valve 3 is slowly opened as the current of the grinding mill body 1 increases from small to large, and when stopping, the electric valve 3 is immediately closed;

[0037] A feeding device automatically transfers the product to be processed to the grinding mill body 1;

[0038] The discharging device is connected to the grinding mill body 1 and is used for discharging materials.

[0039] The benefit of adopting the above technical solution is that it prevents the roughness caused by excessive wind force during the start-up and stop processes, thereby improving production quality.

[0040] In some embodiments, the blower 2 is connected to an air inlet pipe 21, and the electric valve 3 is arranged on the air inlet pipe 21, including: an electric actuator 31, a valve stem 32, a valve plate 33 and a mounting portion 34, the mounting portion 34 is connected to the air inlet pipe 21, the valve plate 33 is arranged in the mounting portion 34, the valve plate 33 is connected to the valve stem 32, the electric actuator 31 drives the valve plate 33 to rotate, the electric actuator 31 is connected to the main control device, the mounting portion 34 is a cylindrical member, the valve plate 33 is arranged inside, and when the valve plate 33 surface is in contact with the mounting portion When the axis of the part 34 is vertical, it is in the closed state. The rotation of the valve stem 32 drives the valve plate 33 to rotate to form a certain angle, and a gap is generated between the mounting part 34 and the valve plate 33. When the valve plate 33 rotates 90 degrees, it is the maximum opening and closing position of the electric valve 3. The electric actuator 31 is connected to the control system of the mill body 1. As the mill body 1 starts, it gradually opens to control the air volume entering the mill body 1 to avoid coarse air leakage. When the mill body 1 is closed, the electric valve 3 is immediately closed, which can also prevent the unground product from entering the discharging device.

[0041] In some embodiments, the discharging device includes: a discharging pipe 4, a cyclone collector 5 is arranged on the upper part of the discharging pipe 4, the cyclone collector 5 is connected to the return air pipe 6, the return air pipe 6 is connected to the air inlet of the blower 2, the discharging pipe 4 is an inverted conical pipe, and the cyclone collector 5 is arranged on the upper part of the conical pipe.

[0042] The cyclone collector 5 separates dust and exhaust gas through rotating airflow and centrifugal force. The gas of the ground product enters the cyclone collector 5, and then the solid particles are separated under the action of the rotating airflow, and the clean gas enters the return air duct 6 and continues to enter the grinding machine body 1. It has a simple structure, convenient maintenance and good separation effect.

[0043] In some embodiments, two discharge ports 41 are provided at the bottom of the discharge pipe 4, and the discharge port 41 is provided with a finished product discharge valve 42. The finished product discharge valve 42 is an electric valve connected to the control system. When discharge is required, the electric valve opens, and when discharge is not required, the electric valve closes. A material level sensor is provided inside the discharge pipe 4, and an alarm is issued when the material level is too high.

[0044] The setting of the finished product discharge valve 42 can control the speed and position of the discharge, thereby achieving rapid discharge.

[0045] In some embodiments, the mill body 1 is connected to a surplus air duct 7, which is provided with a manual regulating valve to adjust the amount of air passing through the surplus air duct, and the surplus air duct 7 is connected to a dust collector 71, which is used to filter the air discharged from the mill body 1, and the dust collector 71 is provided with a valve, which is also an electric valve, to discharge the filtered impurities from the bottom, so as to realize the automatic discharge of impurities, and no need to open and clean up, which saves time and can also extend the service life. The excess air in the mill body 1 is discharged from the surplus air duct 7, and discharged after dust removal by a vacuum cleaner, which can effectively reduce the pollution to the environment.

[0046] In some embodiments, the feeding device includes a crusher 8 and an elevator 81, a transmission cylinder is arranged on the upper side of the elevator 81, the transmission cylinder is connected to the mill body 1, and a plurality of lifting plates are arranged in the transmission cylinder, and the lifting plates continuously lift the material from the bottom to the storage hopper arranged on the side of the mill body 1. The crusher 8 is arranged on the ground, and the material is fed through other equipment, the product to be ground is firstly crushed, and then automatically fed through the elevator 81, so as to improve the grinding efficiency, reduce the wear of the grinding roller 14 and the grinding ring 15, extend the service life of the grinding roller 14, and improve the grinding accuracy.

[0047] In some embodiments, a classifier 11 is provided on the upper side of the mill body 1, a classifier rotor 12 is provided inside the classifier 11, a driving assembly is provided on the upper part of the classifier 11 to drive the internal classifier rotor 12 to rotate, and an outlet is also provided on the upper side, and the ground material and the mixed gas with air enter the discharge pipe 4 through the outlet. The classifier 11 plays a screening role in the process of grinding, and the fine powder that meets the conditions passes through the classifier 11 and enters the discharge device for discharge, and the unsatisfactory powder falls back into the mill for further grinding.

[0048] In some embodiments, the cyclone collector 5 is a double cyclone collector. Centrifugal force is used to separate materials, and the separated materials are deposited at the bottom of the discharge pipe 4, which reduces the loss of materials during the separation process and improves the separation efficiency and collection purity of the sample.

[0049] In some embodiments, the grinding mill body 1 is provided with a driving member, a scraper frame 13, a large base 13, a grinding roller 14 and a grinding ring 15. The grinding roller 14 is arranged on a plum blossom frame and cooperates with the grinding ring 15 to grind the material. The scraper frame 13 is provided with a scraper to guide the material at the bottom to the grinding outlet. The driving member drives the grinding roller 14 to rotate to ensure the grinding effect.

[0050] In some embodiments, the large base 13 is provided with slag discharge holes 16, and the slag discharge holes 16 are provided in multiple locations.

[0051] The slag discharge hole 16 is provided to discharge the hard slag that cannot be ground from the bottom, thereby preventing the hard slag from wearing the grinding roller 14 and the grinding ring 15, and extending the service life of the entire device.

[0052] During the working process, the main body 1 of the mill is provided with materials through the hoist 81, and the blower 2 blows air into the main body 1 of the mill. When the main body 1 of the mill is turned on from small to large, the electric valve 3 is slowly opened to the maximum as the current of the main body 1 of the mill increases from small to large, and the main body 1 of the mill is ground. The ground materials are screened by the classifier 11 and enter the discharge pipe 4. The discharge pipe 4 is provided with a cyclone collector 5 to collect the materials and discharge them from the bottom of the discharge pipe 4. The excess wind in the main body 1 of the mill is discharged from the residual wind pipe 7. After the grinding is completed, the main body 1 of the mill is closed, and the electric valve 3 is immediately closed. Avoid excessive wind force to cause the unground materials to enter the discharge pipe 4, and effectively reduce the occurrence of coarse running.

[0053] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A milling machine for preventing coarse powder from escaping, characterized in that: include: A grinding machine body (1) is provided with a grinding mechanism inside; The blowing assembly comprises a blower (2) connected to the grinding mill body (1), the blower (2) having an air inlet provided with an electric valve (3), when starting, the electric valve (3) slowly opens as the current of the grinding mill body (1) increases from small to large, and when stopping, the electric valve (3) immediately closes; A feeding device that automatically transfers the product to be processed to the grinding mill body (1); A discharging device is connected to the grinding mill body (1) and is used for discharging materials.

2. The anti-runaway mill according to claim 1, characterized in that: The blower (2) is connected to an air inlet pipe (21); the electric valve (3) is arranged on the air inlet pipe (21), and comprises: an electric actuator (31), a valve stem (32), a valve plate (33) and a mounting portion (34); the mounting portion (34) is connected to the air inlet pipe (21); the valve plate (33) is arranged in the mounting portion (34); the valve plate (33) is connected to the valve stem (32); and the electric actuator (31) drives the valve plate (33) to rotate.

3. The anti-runaway mill according to claim 1, characterized in that: The discharging device comprises: a discharging pipe (4), a cyclone collector (5) is arranged on the upper part of the discharging pipe (4), the cyclone collector (5) is connected to a return air pipe (6), and the return air pipe (6) is connected to the air inlet of the blower (2).

4. The anti-runaway mill according to claim 3, characterized in that: The bottom of the discharge pipe (4) is provided with two discharge ports (41), and the discharge ports (41) are provided with finished product discharge valves (42).

5. The anti-runaway mill according to claim 1, characterized in that: The grinding mill body (1) is connected to a residual air duct (7), and the residual air duct (7) is connected to a dust collector (71).

6. The anti-runaway mill according to claim 1, characterized in that: The feeding device comprises a crusher (8) and an elevator (81), a transmission cylinder is arranged on the upper side of the elevator (81), and the transmission cylinder is connected to the grinding mill body (1).

7. The anti-runaway mill according to claim 1, characterized in that: A classifier (11) is arranged on the upper side of the grinding mill body (1), and a classifier rotor (12) is arranged inside the classifier (11).

8. The anti-runaway mill according to claim 3, characterized in that: The cyclone collector (5) is a double cyclone collector.

9. The anti-runaway mill according to claim 1, characterized in that: The grinding mill body (1) is provided with a driving member, a scraper frame, a large base (13), a grinding roller (14) and a grinding ring (15).

10. The anti-escape mill according to claim 9, characterized in that: The large base (13) is provided with a slag discharge hole (16).

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