Ring roller mill

Abstract

The ring roller mill comprises a grading device and a crushing device mounted below the grading device, and the grading device is communicated with the crushing device; the grading device comprises a grading cylinder, the grading cylinder communicates with the crushing device and is located above the crushing device, a grading wheel is rotationally installed in the grading cylinder, the grading wheel is arranged at the top of the grading cylinder, and the grading wheel is in driving connection with a grading motor fixedly arranged on the grading cylinder; a shunting device is fixedly arranged in the grading barrel, is arranged between the grading barrel and the grading wheel, and is used for shunting and shaking the crushed ore coarse grains adhered with fine powder; a plurality of air inlet valves are installed at the bottom of the smashing device, communicate with an inner cavity of the smashing device and are used for controlling the amount of air entering the smashing device. According to the device, fine powder adhered to large crushed ore coarse grains separated by the grading wheel can be further separated, so that the production efficiency is improved, and the production cost is reduced; and moreover, the air inlet intensity can be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder processing equipment technical field especially relates to ring roller mill. BACKGROUND

[0002] Ring roller mill adopts the principle of impact, rolling and grinding to crush materials. It is widely used in the crushing processing field of non-metallic minerals, such as heavy calcium, kaolin, talc, wollastonite, barite and feldspar.

[0003] The working principle of the prior art ring roller mill is that materials are put in between the powder grinding main machine and the classifier, and after multi-layer grinding of the main machine ring roller, they reach the lower part of the powder grinding main machine. Due to the interval formed between the main machine shell and the grinding ring seat, under the negative pressure of the system, the powder is pumped from the interval to the classifier for classification, and the remaining coarse particles of crushed ore fall into the powder grinding main machine for further grinding.

[0004] When the existing ring roller mill is used, fine powder often adheres to the coarse particles of crushed ore, which is difficult to collect directly after being separated by the classification wheel, resulting in that the fine powder adheres to the coarse particles of crushed ore and participates in grinding together, reducing the production efficiency and increasing the production cost.

[0005] Moreover, when the existing ring roller mill is used, the adjustment of air flow intensity is realized by an external vacuum device, which has a large adjustment range and a troublesome adjustment process, and cannot be adjusted in time. UTILITY MODEL CONTENTS

[0006] Therefore, the utility model wants to solve the technical problem: provide a kind of ring roller mill, can further separate the fine powder adhered to the coarse particles of crushed ore after being separated by classification wheel, improve production efficiency, reduce production cost;And, can adjust the intensity of incoming air.

[0007] To solve the above technical problems, the technical scheme of the utility model is:

[0008] Ring roller mill, including classification device and being installed in the classification device below the crushing device, the classification device with the crushing device is communicated;

[0009] The classification device includes a classification cylinder, the classification cylinder is communicated with the crushing device and located above it, a classification wheel is rotatably installed in the classification cylinder, the classification wheel is arranged at the top of the classification cylinder, and the classification wheel is drivenly connected with a classification motor fixed on the classification cylinder;

[0010] A flow dividing device is fixed in the classification cylinder, the flow dividing device is arranged between the classification cylinder and the classification wheel, and the flow dividing device is used to divide and shake the coarse particles of crushed ore with fine powder adhered thereto;

[0011] The bottom of the crushing device is provided with a plurality of air inlet valves which are communicated with the inner cavity of the crushing device and are used to control the air inlet amount.

[0012] Preferably, the flow distribution device comprises a flow distribution cylinder, the classification cylinder, the flow distribution cylinder and the classification wheel are coaxially arranged, and the flow distribution cylinder is arranged at the periphery of the classification wheel.

[0013] A plurality of tension spring groups are elastically connected to the inner wall of the flow distribution cylinder, the screen cylinder is arranged between the flow distribution cylinder and the classification wheel, the top of the screen cylinder is located between the top of the flow distribution cylinder and the bottom of the classification wheel, the cross-sectional shape of the screen cylinder and the flow distribution cylinder is inverted trapezoidal, and the included angle between the side wall of the screen cylinder and the horizontal plane is smaller than the included angle between the side wall of the flow distribution cylinder and the horizontal plane.

[0014] Preferably, the tension spring groups comprise a plurality of upper tension spring groups, a plurality of middle tension spring groups and a plurality of lower tension spring groups which are equidistantly arranged around the axis of the flow distribution cylinder, and the plurality of upper tension spring groups, the plurality of middle tension spring groups and the plurality of lower tension spring groups are sequentially arranged from top to bottom along the vertical direction.

[0015] The plurality of upper tension spring groups are located in the same circumferential surface, the plurality of middle tension spring groups are located in the same circumferential surface, and the plurality of lower tension spring groups are located in the same circumferential surface.

[0016] Preferably, the upper tension spring group comprises an upper connecting seat fixedly arranged on the flow distribution cylinder, a hanging ear fixedly arranged on the screen cylinder and an upper tension spring arranged between the upper connecting seat and the hanging ear.

[0017] The middle tension spring group comprises a first middle connecting seat fixedly arranged on the flow distribution cylinder, a second middle connecting seat fixedly arranged on the screen cylinder and a middle tension spring arranged between the first middle connecting seat and the second middle connecting seat.

[0018] The lower tension spring group comprises a lower connecting seat fixedly arranged on the flow distribution cylinder, a hanging hole arranged on the screen cylinder and a lower tension spring arranged between the lower connecting seat and the hanging hole.

[0019] Preferably, the number of the upper tension spring group, the middle tension spring group and the lower tension spring group is eight.

[0020] Preferably, a plurality of screen hole groups arranged along the vertical direction are arranged on the screen cylinder, and each screen hole group comprises a plurality of screen holes arranged around the axis of the screen cylinder.

[0021] Preferably, a turbulence block with an annular structure is arranged between two adjacent screen hole groups.

[0022] Preferably, a turbulence inclined surface is arranged on the turbulence block, and the turbulence inclined surface is inclined from top to bottom towards the side close to the axis of the screen cylinder.

[0023] Preferably, the angle between the side wall of the screen cylinder and the horizontal plane is 60°, and the angle between the side wall of the shunt cylinder and the horizontal plane is 80°.

[0024] Preferably, the plurality of air inlet valves are equidistantly arranged around the circumference of the crushing device, the number of the air inlet valves is four, and the air inlet valves are manual butterfly valves.

[0025] After the above technical scheme is adopted, the beneficial effects of the present application are as follows:

[0026] The ring roller mill of the present application comprises a classification device and a crushing device, the classification device is communicated with the crushing device, the classification device comprises a classification cylinder, the classification cylinder is communicated with and located above the crushing device, a classification wheel is rotatably installed in the classification cylinder, and the classification wheel is drivingly connected with a classification motor.

[0027] A shunt device is fixedly arranged in the classification cylinder, the shunt device is arranged between the classification cylinder and the classification wheel, and the shunt device is used for shunting and shaking the coarse ore particles adhering with the fine powder.

[0028] The shunt device comprises a shunt cylinder, the classification cylinder, the shunt cylinder and the classification wheel are coaxially arranged, and the shunt cylinder is arranged at the peripheral portion of the classification wheel. The coarse ore particles falling freely are different in size, and the larger coarse ore particles will directly fall on the shunt cylinder, are gathered and then fall in the crushing device to continue to participate in the crushing.

[0029] A plurality of air inlet valves are installed at the bottom of the crushing device, the air inlet valves are communicated with the inner cavity of the crushing device, the air inlet valves are used for controlling the air inlet amount into the crushing device, can adjust the air inlet intensity, change the discharge speed of the fine powder and improve the collection quality of the fine powder. BRIEF DESCRIPTION OF DRAWINGS

[0030] The present application will be further described below in combination with the drawings and examples.

[0031] Figure 1is a structural schematic view of the ring roller mill of the embodiment of the utility model;

[0032] Figure 2 is Figure 1 is a structural schematic view of the screening cylinder;

[0033] Figure 3 is Figure 2 is a perspective view of the screening cylinder;

[0034] in the figure:

[0035] 1, grading device; 2, crushing device; 3, grading cylinder; 4, grading wheel; 5, grading motor; 6, flow dividing cylinder; 7, tension spring group; 71, upper tension spring group; 711, upper connecting seat; 712, ear; 713, upper tension spring; 72, middle tension spring group; 721, middle connecting seat one; 722, middle connecting seat two; 723, middle tension spring; 73, lower tension spring group; 731, lower connecting seat; 732, hanging hole; 733, lower tension spring; 8, screening cylinder; 81, screening hole; 82, spoiler block; 821, spoiler inclined surface; 9, air inlet valve;

[0036] a is the included angle between the side wall of the screening cylinder and the horizontal plane; b is the included angle between the side wall of the flow dividing cylinder and the horizontal plane. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model more clearly and clearly, the following will be further detailed by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0038] As Figures 1 to 3 The utility model discloses a grading device 1 and the crushing device 2 installed below grading device 1, and grading device 1 communicates with crushing device 2. For those skilled in the art, the crushing device 2 is a well-known technology, and its specific structure will not be repeated here. The crushing device 2 is an important component for crushing and forming powder of the material. The crushed and formed powder is discharged by the grading device 1 through the suction of the external negative pressure device. In this process, the grading device 1 classifies the powder. The powder with smaller volume is discharged, while the powder with larger volume, including the coarse particles of the crushed ore, falls into the crushing device 2 due to gravity to continue to participate in the crushing.

[0039] The application is first improved to the grading device 1, the grading device 1 includes a grading cylinder 3, the grading cylinder 3 is communicated with the crushing device 2 and is located above it, the grading wheel 4 is rotatably installed in the grading cylinder 3, the grading wheel 4 is arranged at the top of the grading cylinder 3, and the grading wheel 4 is drivingly connected with the grading motor 5 fixedly arranged on the grading cylinder 3; the material is crushed into coarse ore particles and fine powder after passing through the crushing device 2, wherein the fine powder with small volume is discharged by the grading wheel 4, and the other part adheres to the coarse ore particles and falls freely together.

[0040] The grading cylinder 3 is fixedly provided with a flow dividing device, the flow dividing device is arranged between the grading cylinder 3 and the grading wheel 4, and the flow dividing device is used for dividing and shaking the coarse ore particles adhering to the fine powder; wherein the flow dividing device includes a flow dividing cylinder 6, the grading cylinder 3, the flow dividing cylinder 6 and the grading wheel 4 are coaxially arranged, and the flow dividing cylinder 6 is arranged at the peripheral portion of the grading wheel 4; the coarse ore particles falling freely are different in size, and the larger particles will directly fall on the flow dividing cylinder 6, be gathered and then fall in the crushing device 2 to continue to participate in crushing.

[0041] The inner wall of the flow dividing cylinder 6 is elastically connected with a sieve cylinder 8 through a plurality of tension spring groups 7, the sieve cylinder 8 is arranged between the flow dividing cylinder 6 and the grading wheel 4, the top of the sieve cylinder 8 is located between the top of the flow dividing cylinder 6 and the bottom of the grading wheel 4, the cross-sectional shape of the sieve cylinder 8 and the flow dividing cylinder 6 is all inverted trapezoidal, and the included angle a between the side wall of the sieve cylinder 8 and the horizontal plane is smaller than the included angle b between the side wall of the flow dividing cylinder 6 and the horizontal plane. Preferably, the included angle a between the side wall of the sieve cylinder 8 and the horizontal plane is 60°, and the included angle b between the side wall of the flow dividing cylinder 6 and the horizontal plane is 80°.

[0042] The coarse ore particles with small volume will float to the grading wheel but finally fall on the sieve cylinder 8, collide with the cylinder wall of the sieve cylinder 8 in the falling process, separate the fine powder adhering to the surface, and the fine powder falling down can be discharged outward in time through the grading wheel 4 and be collected due to the close arrangement of the sieve cylinder 8 to the grading wheel 4; meanwhile, the sieve cylinder 8 is elastically connected with the tension spring group 7 and can shake under the action of airflow, so that the coarse ore particles adhering to the fine powder are shaken, the efficiency of separating the fine powder is improved, and the production cost is reduced.

[0043] For the application, the tension spring group 7 includes a plurality of upper tension spring groups 71, a plurality of middle tension spring groups 72 and a plurality of lower tension spring groups 73 arranged equidistantly around the axis of the flow dividing cylinder 6, and the plurality of upper tension spring groups 71, the plurality of middle tension spring groups 72 and the plurality of lower tension spring groups 73 are sequentially arranged from top to bottom along the vertical direction; the plurality of upper tension spring groups 71 are in the same circumferential surface, the plurality of middle tension spring groups 72 are in the same circumferential surface, and the plurality of lower tension spring groups 73 are in the same circumferential surface. The upper tension spring group 71, the middle tension spring group 72 and the lower tension spring group 73 are mutually matched, meet the requirement of installing the sieve cylinder 8 in the flow dividing cylinder 6, and can also make the sieve cylinder 8 shake.

[0044] Preferably, the upper pull spring set 71 comprises an upper connecting seat 711 fixed on the shunt cylinder 6, a hanging ear 712 fixed on the sieve cylinder 8, and an upper pull spring 713 installed between the upper connecting seat 711 and the hanging ear 712; the middle pull spring set 72 comprises a middle connecting seat one 721 fixed on the shunt cylinder 6, a middle connecting seat two 722 fixed on the sieve cylinder 8, and a middle pull spring 723 installed between the middle connecting seat one 721 and the middle connecting seat two 722; and the lower pull spring set 73 comprises a lower connecting seat 731 fixed on the shunt cylinder 6, a hanging hole 732 formed on the sieve cylinder 8, and a lower pull spring 733 installed between the lower connecting seat 731 and the hanging hole 732. Preferably, the number of the upper pull spring set 71, the middle pull spring set 72, and the lower pull spring set 73 is eight or six, which needs to be changed according to the actual size.

[0045] For the present application, the sieve cylinder 8 is provided with a plurality of vertically arranged sieve hole groups, each of which comprises a plurality of sieve holes 81 arranged around the axis of the sieve cylinder 8. Preferably, the number of the sieve hole groups is five, and the sieve holes 81 are elliptical holes arranged vertically. On the basis of meeting the shaking and impacting of the coarse ore by the sieve cylinder 8, the rate of sieving the coarse ore is improved, and the coarse ore can fall into the crushing device 2 in time.

[0046] An annular turbulence block 82 is installed between two adjacent sieve hole groups. When the coarse ore falls and impacts the inner wall of the sieve cylinder 8, it can be blocked by the turbulence block 82. Because the cross-sectional shape of the sieve cylinder 8 is inverted trapezoidal, the inner wall is inclined, and after being blocked by the turbulence block 82, the falling speed of the coarse ore is slowed down, but it will rise and float up and down due to the influence of the airflow, thereby increasing the probability of mutual impact between the coarse ores and enhancing the efficiency of separating the fine powder adhered thereto.

[0047] The turbulence block 82 is provided with a turbulence inclined surface 821 inclined from top to bottom to the side close to the axis of the sieve cylinder 8. The inclined turbulence inclined surface 821 meets the needs of disturbing the coarse ore and does not affect its falling due to its own gravity.

[0048] The present application also improves the crushing device 2. The bottom of the crushing device 2 is provided with a plurality of air inlet valves 9, which are in communication with the inner cavity of the crushing device 2 and are used to control the air intake into the crushing device 2. Preferably, the plurality of air inlet valves 9 are equidistantly arranged around the circumference of the crushing device 2, and the number of the air inlet valves 9 is four. The air inlet valves 9 are manual butterfly valves, which can manually adjust the air intake strength, change the discharge speed of the fine powder, and improve the collection quality of the fine powder.

[0049] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A ring roller mill comprising a classification device and a crushing device installed below the classification device, the classification device being in communication with the crushing device; characterized in that, the classification device comprises a classification cylinder, the classification cylinder being in communication with and above the crushing device, a classification wheel being rotatably installed in the classification cylinder, the classification wheel being arranged at the top of the classification cylinder, the classification wheel being drivingly connected with a classification motor fixed on the classification cylinder; a flow dividing device is fixed in the classification cylinder, the flow dividing device being arranged between the classification cylinder and the classification wheel, the flow dividing device being used for flow dividing and shaking of coarse ore particles with fine powder adhered thereto; a plurality of air inlet valves are installed at the bottom of the crushing device, the air inlet valves being in communication with the inner cavity of the crushing device, the air inlet valves being used for controlling the air inlet amount into the crushing device.

2. The ring roller mill of claim 1, wherein, the flow dividing device comprises a flow dividing cylinder, the classification cylinder, the flow dividing cylinder and the classification wheel being coaxially arranged, the flow dividing cylinder being arranged at the peripheral portion of the classification wheel; a plurality of tension spring groups are elastically connected with a screen cylinder on the inner wall of the flow dividing cylinder, the screen cylinder being arranged between the flow dividing cylinder and the classification wheel, the top of the screen cylinder being between the cylinder top of the flow dividing cylinder and the wheel bottom of the classification wheel, the screen cylinder and the flow dividing cylinder both having an inverted trapezoidal cross-sectional shape, the included angle between the side wall of the screen cylinder and the horizontal plane being smaller than the included angle between the side wall of the flow dividing cylinder and the horizontal plane.

3. The ring roller mill of claim 2, wherein, the tension spring groups comprise a plurality of upper tension spring groups, a plurality of middle tension spring groups and a plurality of lower tension spring groups arranged equidistantly around the axis of the flow dividing cylinder, the plurality of upper tension spring groups, the plurality of middle tension spring groups and the plurality of lower tension spring groups being arranged vertically from top to bottom in sequence; the plurality of upper tension spring groups are in the same circumferential surface, the plurality of middle tension spring groups are in the same circumferential surface, and the plurality of lower tension spring groups are in the same circumferential surface.

4. The ring roller mill according to claim 3, characterized in that, the upper tension spring group comprises an upper connecting seat fixed on the flow dividing cylinder, a hanging ear fixed on the screen cylinder and an upper tension spring installed between the upper connecting seat and the hanging ear; the middle tension spring group comprises a first middle connecting seat fixed on the flow dividing cylinder, a second middle connecting seat fixed on the screen cylinder and a middle tension spring installed between the first middle connecting seat and the second middle connecting seat; the lower tension spring group comprises a lower connecting seat fixed on the flow dividing cylinder, a hanging hole opened on the screen cylinder and a lower tension spring installed between the lower connecting seat and the hanging hole.

5. The ring roll mill of claim 4, wherein, the number of the upper tension spring group, the middle tension spring group and the lower tension spring group is eight.

6. The ring roll mill of claim 2, wherein, a plurality of screen hole groups arranged vertically are opened on the screen cylinder, each screen hole group comprising a plurality of screen holes arranged around the axis of the screen cylinder.

7. The ring roll mill of claim 6, wherein, annular turbulence blocks are installed between adjacent two screen hole groups.

8. The ring roll mill of claim 7, wherein, turbulence inclined surfaces are arranged on the turbulence blocks, the turbulence inclined surfaces being inclined from top to bottom towards the side close to the axis of the screen cylinder.

9. The ring roll mill of claim 2, wherein, the included angle between the side wall of the screen cylinder and the horizontal plane is 60°, and the included angle between the side wall of the flow dividing cylinder and the horizontal plane is 80°.

10. The ring roll mill of claim 1, wherein, a plurality of air inlet valves are equidistantly arranged around the circumference of the crushing device, the number of the air inlet valves being four, and the air inlet valves being manual butterfly valves.

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