A vertical grinding feed device for grinding and selecting quartz

Abstract

The utility model discloses a vertical mill feeding device for grinding quartz, wherein the feeding funnel is connected to a quantitative feeder below, the quantitative feeder outlet intermediate bin, a support seat and a bracket are welded around the intermediate bin, the support seat is located directly above the bracket and a weighing sensor is installed between the support seat and the bracket, an electric gate valve is provided at the bottom end of the intermediate bin, the bottom end of the electric gate valve is connected to a slide pipe, the bottom end of the slide pipe is connected to a feed pipe through a flange, a vertical mill body is installed at the bottom end of the feed pipe, and the bottom end of the vertical mill body passes through the shell of the slide pipe and extends to the inside of the vertical mill body. The quartz entering the feed pipe of the utility model will contact the protective inner rings AA and BB staggered up and down on the inner wall of the feed pipe, and the quartz will collide with the protective sheets constituting the protective inner rings AA and BB, thereby avoiding direct contact between the quartz and the inner wall of the feed pipe, reducing the wear of the inner wall of the feed pipe and extending the service life of the feed pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill feeding devices, in particular to a vertical mill feeding device for grinding and selecting quartz. Background Art

[0002] Vertical roller mill, also known as vertical mill, is a kind of equipment used for grinding cement raw materials, cement clinker, slag and coal slag. It has two functions of drying and grinding. Its characteristics are: simple structure, low manufacturing and use costs. Its working principle is: the motor drives the grinding disc to rotate through the reducer, and the material falls from the feed pipe to the center of the grinding disc through the wind lock feeder. At the same time, hot air enters the mill from the air inlet. As the grinding disc rotates, the material moves to the edge of the grinding disc under the action of centrifugal force, and is crushed by the grinding roller. After crushing, the material is carried up by the high-speed airflow of the wind ring, and the large particles fall directly onto the grinding disc for re-grinding. When the material in the airflow passes through the upper separator, under the action of the rotating rotor, the coarse powder falls from the cone bucket to the grinding disc for re-grinding, and the qualified fine powder is discharged from the mill with the airflow and collected by the dust collecting device.

[0003] Quartz powder is an important flux that needs to be added to flash smelting. It needs to be prepared by a vertical mill. When using a vertical mill, the quartz raw material needs to be added into the vertical mill through a feeding device or component. The feeding device of the vertical mill generally includes a feeding funnel, a feeding pipe, a valve, an air lock feeder, etc.

[0004] However, when quartz is fed through a feed tube, the high hardness and strong abrasiveness of quartz can easily wear the inner wall of the feed tube, causing damage to the feed tube and reducing its service life; therefore, it does not meet existing needs. We have proposed a vertical mill feeding device for grinding quartz. Utility Model Content

[0005] The purpose of the utility model is to provide a vertical grinding feeding device for grinding quartz, so as to solve the problems raised in the above background technology that when quartz is fed through a feed tube, the quartz has high hardness and strong abrasiveness and is very easy to wear the inner wall of the feed tube, resulting in damage to the feed tube and reduced service life.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vertical mill feeding device for grinding and selecting quartz, comprising a feeding funnel, characterized in that: the feeding funnel is connected to a quantitative feeder at the bottom, the quantitative feeder outlet is an intermediate bin, a support seat and a bracket are welded around the intermediate bin, the support seat is located directly above the bracket and a weighing sensor is installed between the bracket, an electric gate valve is provided at the bottom end of the intermediate bin, a slide pipe is connected to the bottom end of the electric gate valve, a feed pipe is connected to the bottom end of the slide pipe through a flange, a vertical mill body is installed at the bottom end of the feed pipe, and the bottom end of the vertical mill body passes through the shell of the slide pipe and extends to the inside of the vertical mill body.

[0007] Preferably, a plurality of protective inner rings AA and protective inner rings BB are installed inside the feed pipe, and the protective inner rings AA and protective inner rings BB are staggered up and down, and the protective inner rings AA and protective inner rings BB each include a plurality of protective plates distributed in a circular array around the axis of the feed pipe, and the top of the protective plate is fixed on the inner wall of the feed pipe.

[0008] Preferably, the spacing between two horizontally adjacent protection sheets is smaller than the width of the protection sheets, and the protection sheet constituting the protection inner circle AA is located directly above the gap between two adjacent protection sheets constituting the protection inner circle BB.

[0009] Preferably, the protective sheet comprises a fixed connecting sheet and two bent connecting sheets, wherein the fixed connecting sheet is fixed on the inner wall of the feed pipe and one of the bent connecting sheets is fixed to the fixed connecting sheet.

[0010] Preferably, the two bent connecting pieces are both arc-shaped with a known bending radius, and a protective spring sheet is fixed between the two bent connecting pieces.

[0011] Preferably, the bottom end of the protective spring sheet is inclined toward the axial direction of the feed pipe and the inclination angle is 15 to 30 degrees.

[0012] Preferably, a buffer connecting piece is fixed on the bent connecting piece at the bottom end of the protective spring piece, an anti-blocking connecting piece is fixed at one end of the buffer connecting piece, and the top end of the anti-blocking connecting piece is bent and the bottom end is downward.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The quartz entering the feed tube of the utility model will contact the protective inner rings AA and BB staggered up and down on the inner wall of the feed tube, and the quartz will collide with the protective sheets constituting the protective inner rings AA and BB, thereby preventing the quartz from directly contacting the inner wall of the feed tube, reducing the wear of the inner wall of the feed tube and extending the service life of the feed tube;

[0015] 2. The utility model fixes arc-shaped bending connecting pieces at both ends of the protective spring piece, and the bottom end of the protective spring piece is inclined and close to the axis of the feed pipe, so that the protective piece has elasticity, can buffer the impacted quartz and push it back in the opposite direction, so that the quartz bounces inside the feed pipe, avoiding the falling quartz from blocking the feed pipe. At the same time, the protective piece constituting the protective inner ring AA is located directly above the gap between the protective pieces constituting the protective inner ring BB, ensuring that the quartz will not be stuck in the gap between the protective pieces and the protective pieces, and will not affect the normal use of the protective pieces;

[0016] 3. The utility model realizes quantitative feeding by adding a quantitative feeder, an intermediate bin, an electric gate valve, a slide pipe and a weighing sensor between the feed hopper and the vertical mill body, and the system is compactly arranged, which reduces the number of maintenance times caused by wear and tear of equipment and facilities, improves the equipment operation rate, and reduces the work intensity of job positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the feed pipe of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the protective inner ring A and the protective inner ring B of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the protective sheet of the utility model.

[0021] In the figure: 1. Vertical mill body; 2. Intermediate bin; 3. Feed pipe; 4A. Protective inner ring A; 4B. Protective inner ring B; 41. Protective sheet; 411. Fixed connecting sheet; 412. Bending connecting sheet; 413. Protective spring sheet; 414. Buffer connecting sheet; 415. Anti-blocking connecting sheet; 5. Feed hopper; 6. Quantitative feeder; 7. Support seat; 8. Bracket; 9. Electric gate valve; 10. Slide pipe; 11. Weighing sensor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] like Figure 1 As shown, a vertical mill feeding device for grinding and selecting quartz, the feeding funnel 5 is connected with a quantitative feeder 6, the quantitative feeder 6 outlet intermediate bin 2, four support seats 7 and four brackets 8 are welded around the intermediate bin 2, the support seat 7 is located directly above the bracket 8 and a weighing sensor 11 is installed between the bracket 8, an electric gate valve 9 is provided at the bottom end of the intermediate bin 2, a slide pipe 10 is connected to the bottom end of the electric gate valve 9, a feed pipe 3 is connected to the bottom end of the slide pipe 10 through a flange, a vertical mill body 1 is installed at the bottom end of the feed pipe 3, and the bottom end of the vertical mill body 1 passes through the shell of the slide pipe 10 and extends to the inside of the vertical mill body 1.

[0024] like Figure 2 and Figure 3As shown, a plurality of protective inner rings A4A and protective inner rings B4B are installed inside the feed tube 3, and the protective inner rings A4A and protective inner rings B4B are staggered up and down. The protective inner rings A4A and protective inner rings B4B staggered up and down on the inner wall of the feed tube 3 are utilized to prevent quartz from directly contacting the inner wall of the feed tube 3 after entering the feed tube 3, thereby reducing the wear of the feed tube 3 and extending the service life of the feed tube 3.

[0025] Both the protective inner ring A4A and the protective inner ring B4B include a plurality of protective sheets 41 distributed in a circular array around the axis of the feed tube 3. The top end of the protective sheet 41 is fixed on the inner wall of the feed tube 3. The spacing between two horizontally adjacent protective sheets 41 is smaller than the width of the protective sheet 41. The protective sheet 41 constituting the protective inner ring A4A is located directly above the gap between two adjacent protective sheets 41 constituting the protective inner ring B4B, thereby ensuring that the quartz is smoothly transmitted inside the feed tube 3 and that the quartz in transmission will not get stuck between two adjacent protective sheets 41.

[0026] like Figure 4 As shown, the protective sheet 41 includes a fixed connecting sheet 411 and two bent connecting sheets 412. The fixed connecting sheet 411 is fixed on the inner wall of the feed tube 3 and one of the bent connecting sheets 412 is fixed to the fixed connecting sheet 411. The two bent connecting sheets 412 are both arc-shaped and have a known bending radius. A protective spring sheet 413 is fixed between the two bent connecting sheets 412. The bottom end of the protective spring sheet 413 is inclined toward the axial direction of the feed tube 3 and the inclination angle is 15 to 30 degrees. The bent connecting sheet 412 is arc-shaped and has bending deformation ability. The protective spring sheet 413 is inclined and will approach the feed tube 3 after being impacted, and will buffer the impact and rebound the impactor to prevent the quartz from stagnating inside the feed tube 3 and causing blockage inside the feed tube 3.

[0027] A buffer connecting piece 414 is fixed on the bent connecting piece 412 at the bottom end of the protective spring piece 413, and an anti-blocking connecting piece 415 is fixed at one end of the buffer connecting piece 414. The top of the anti-blocking connecting piece 415 is bent and the bottom is downward. The buffer connecting piece 414 and the anti-blocking connecting piece 415 are used to block the gap between the bottom of the protective inner ring A4A and the protective inner ring B4B to prevent quartz from being stuck between the protective inner ring A4A and the protective inner ring B4B and affecting the normal use of the protective inner ring A4A and the protective inner ring B4B.

[0028] Working principle: After the quartz raw material in the feed hopper 5 reaches the quantitative feeder 6, the quantitative feeder 6 is started and the material enters the intermediate bin 2. After reaching a certain material layer, the electric gate valve 9 is opened, and the quartz raw material enters the feed pipe 3 through the electric gate valve 9 and the slide pipe 10, and enters the vertical mill body 1 through the feed pipe 3. After a certain material layer is formed in the vertical mill body 1, the power supply of the vertical mill body 1 is started for production. The intermediate bin is equipped with a weighing sensor with upper and lower limits. When the material level reaches the upper limit during normal production, the quantitative feeder stops, and when the material level reaches the lower limit, the quantitative feeder starts. In the process of the quartz entering the vertical mill body 1 through the feed pipe 3, the quartz entering the inside of the feed pipe 3 will intersect with the protective inner ring staggered up and down on the inner wall of the feed pipe 3. A4A contacts the protective inner ring B4B, and when the quartz collides with the protective sheet 41 that constitutes the protective inner ring A4A and the protective inner ring B4B, the protective spring piece 413 will approach the inner wall of the feed tube 3 due to the collision. At this time, the feed tube 3 will produce a directional force on the collided quartz, so that the collided quartz stops and pushes the collided quartz in the opposite direction, so that the returning quartz and the falling quartz collide with each other, ensuring that the quartz can collide with each other when falling inside the feed tube 3, and will not cause blockage inside the feed tube 3. In addition, due to the existence of the protective sheet 41 that constitutes the protective inner ring A4A and the protective inner ring B4B, direct contact between the quartz and the inner wall of the feed tube 3 can be avoided, thereby reducing the wear of the inner wall of the feed tube 3 and extending the service life of the feed tube 3.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A vertical mill feed device for grinding and selecting quartz, comprising a feed hopper (5), characterized in that: The feed hopper (5) is connected to a quantitative feeder (6) at its outlet intermediate bin (2). A support seat (7) and a bracket (8) are welded around the intermediate bin (2). The support seat (7) is located directly above the bracket (8) and a weighing sensor (11) is installed between the support seat (7) and the bracket (8). An electric gate valve (9) is provided at the bottom end of the intermediate bin (2). A chute (10) is connected to the bottom end of the electric gate valve (9). A feed pipe (3) is connected to the bottom end of the chute (10) via a flange. A vertical mill body (1) is installed at the bottom end of the feed pipe (3). The bottom end of the vertical mill body (1) passes through the shell of the chute (10) and extends into the interior of the vertical mill body (1). A plurality of protective inner rings A (4A) and protective inner rings B (4B) are installed inside the feed pipe (3), and the protective inner rings A (4A) and protective inner rings B (4B) are staggered and arranged vertically, and the protective inner rings A (4A) and protective inner rings B (4B) each include a plurality of protective sheets (41) distributed in a circular array around the axis of the feed pipe (3), and the top end of the protective sheet (41) is fixed on the inner wall of the feed pipe (3); The spacing dimension between two horizontally adjacent protective sheets (41) is smaller than the width dimension of the protective sheet (41), and the protective sheet (41) constituting the protective inner ring A (4A) is located directly above the gap between two adjacent protective sheets (41) constituting the protective inner ring B (4B); The protective sheet (41) comprises a fixed connecting sheet (411) and two bent connecting sheets (412); the fixed connecting sheet (411) is fixed on the inner wall of the feed pipe (3) and one of the bent connecting sheets (412) is fixed to the fixed connecting sheet (411).

2. A vertical mill feeding device for grinding and selecting quartz according to claim 1, characterized in that: The two bent connecting pieces (412) are both arc-shaped and have a known bending radius, and a protective spring sheet (413) is fixed between the two bent connecting pieces (412).

3. A vertical mill feed device for grinding and selecting quartz according to claim 2, characterized in that: The bottom end of the protective spring sheet (413) is inclined toward the axial direction of the feed pipe (3) and the inclination angle is 15 to 30 degrees.

4. A vertical mill feed device for grinding and selecting quartz according to claim 3, characterized in that: A buffer connecting piece (414) is fixed on the bent connecting piece (412) at the bottom end of the protective spring sheet (413), and an anti-blocking connecting piece (415) is fixed at one end of the buffer connecting piece (414), and the anti-blocking connecting piece (415) has a bent top and a downwardly facing bottom.

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