Cement mill partition board

Abstract

The utility model belongs to the technical field of cement grinding mills, and particularly relates to a cement grinding mill partition plate which comprises a plurality of annularly distributed grid plates, grid gaps which are formed in the grid plates and are used for screening out crushed cement and ventilating the interior of a grinding mill, and a central circular plate which is used for connecting the plurality of grid plates, the central circular plate is composed of a plurality of ventilation holes distributed in the central circular plate, and filter screens are fixedly arranged in the ventilation holes and used for intercepting cement and only allowing airflow to pass through so as to dissipate heat in the mill; the intercepting part is spliced with the part, not provided with the grate seam, of the grate plate and used for blocking cement with the particle size larger than the size of the grate seam, heat in the mill is effectively dissipated, and therefore the ventilation efficiency and the heat dissipation performance of the mill are improved, seamless splicing of the intercepting part and the grate plate is achieved, and the heat dissipation performance of the mill is improved. The cement with overlarge particles is effectively prevented from entering the next bin, and the grinding quality and the production efficiency of the cement are ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cement mill technical field, concretely relates to cement mill partition board. BACKGROUND

[0002] The cement mill is divided into several compartments by the partition board, and the main function of the partition board is to separate the grinding medium, prevent the axial movement of the medium, prevent the oversized particles from entering the next fine material compartment, make the material be reasonably ground, and control the filling degree, flow rate and grinding speed of the material in the mill. When the cement is processed in the cement mill, the steel scrap and other waste materials or oversized cement particles often block the grate gap of the grate. When the grate gap is blocked, the ventilation effect and the flow rate of the cement in the mill are affected, the heat and moisture in the mill cannot be timely discharged, and the paste ball, paste partition board and over-grinding phenomena are prone to occur. When the feeding amount is large, the material area is small, and the mill head is prone to return material, which not only affects the environmental hygiene, but also greatly increases the labor intensity on site, especially in summer. The heat cannot be timely discharged, the temperature of the cement discharged from the mill is high, the cement quality is affected, and the safe and stable operation of the mill is affected. SUMMARY

[0003] In view of the above problems, the utility model aims to provide a cement mill partition board to solve the problem that the grate gap in the partition board is easily blocked by cement, thereby causing poor ventilation effect in the mill.

[0004] The utility model provides a cement mill partition board, which comprises a plurality of ring-shaped distribution grates, a grate gap provided on the grates for screening the ground cement and ventilating the mill, and a center plate for connecting the plurality of grates. The center plate comprises a ventilation part composed of a plurality of ventilation holes distributed on the center plate, a filter screen fixedly arranged in the ventilation hole for intercepting cement and allowing only airflow to pass through to dissipate heat in the mill, and an intercepting part spliced with the grate without the grate gap for blocking the cement with a particle size larger than the size of the grate gap.

[0005] Preferably, the ventilation hole is conical.

[0006] Preferably, the grate gap comprises a plurality of horizontal grate gaps with parallel external contours of the center plate and vertical grate gaps perpendicular to the horizontal grate gaps and connected thereto.

[0007] Preferably, the opening of the horizontal grate gap and the vertical grate gap near the side of the cement with a particle size larger than the size of the grate gap is smaller than the opening of the side of the cement with a particle size smaller than the size of the grate gap.

[0008] Preferably, a center shaft is installed at the center of the center circular plate, a magnetic attraction rod for attracting the steel chips blocked in the inside of the grate slot is rotatably connected to the center shaft, and a safety cover for limiting the magnetic attraction rod is detachably connected to the outer end of the center shaft.

[0009] Preferably, a scraping plate for cleaning the steel chips attracted on the magnetic attraction rod is fixedly installed on the outside of one of the grate plates, and an elastic member for connecting the magnetic attraction rod is arranged in the inside of the safety cover, which is used for automatically adjusting the distance between the magnetic attraction rod and the grate plate when the magnetic attraction rod is cleaned by the scraping plate.

[0010] The utility model discloses the beneficial effect is: through setting up ventilation part on the center circular plate, and ventilation part utilizes the ventilation hole and filter screen structure, and the filter screen on this ventilation part only allows the airflow in the mill to pass through, realizes the effective emission of mill internal heat, thereby improved the ventilation efficiency and heat dissipation performance of mill,

[0011] Through setting up the horizontal grate slot and vertical grate slot that communicate with each other, the cement particles can be subjected to multi-directional screening when passing through the grate slot, and the opening close to the cement side with the particle size greater than the grate slot size is less than the opening of the cement side with the particle size less than the grate slot size, which can help the cement to pass through the grate slot smoothly, reduce the probability of the grate slot blockage, thereby avoiding affecting the ventilation effect in the mill and affecting the quality of the cement. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the first perspective structure schematic drawing of the utility model;

[0013] Figure 2 It is the second perspective structure schematic drawing of the utility model;

[0014] Figure 3 It is the third perspective structure schematic drawing of the utility model;

[0015] Figure 4 It is the first sectional structure schematic drawing of the utility model;

[0016] Figure 5 It is the second sectional structure schematic drawing of the utility model.

[0017] In the drawing: 1, grate plate; 2, grate slot; 3, center circular plate; 4, ventilation hole; 5, filter screen; 6, intercepting part; 7, horizontal grate slot; 8, vertical grate slot; 9, center shaft; 10, magnetic attraction rod; 11, safety cover; 12, scraping plate; 13, elastic member. DETAILED DESCRIPTION

[0018] In order to make the technical scheme of the utility model better understood by the person skilled in the art, the utility model will be described in detail below in conjunction with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

[0019] The utility model discloses a cement mill partition warehouse board, which mainly comprises a plurality of annularly distributed grate plates 1, a grate gap 2 provided on the grate plate 1 and used for screening the crushed cement and ventilating the inside of the mill, and a central circular plate 3 used for connecting the plurality of grate plates 1, further comprising a through hole (not shown in the figure) provided on the central circular plate 3, which can be used for the crushed cement and the airflow in the mill to pass through.

[0020] As known from the above, the existing cement mill partition warehouse board has the following defects in use: when the cement is processed in the cement mill, the steel chips and other waste materials or large-particle cement in the cement mill often block the grate gap 2 of the grate plate 1, which will affect the ventilation effect and the flow rate of the cement in the mill, the heat and moisture in the mill cannot be discharged in time, and the phenomena of paste ball, paste partition warehouse board and over-grinding are prone to occur.

[0021] As Figures 1-5As shown, the cement mill partition plate, including a plurality of annular distribution of grate 1, set up on the grate 1, for the cement after crushing and screening and ventilation inside the mill grate seam 2 and for connecting a plurality of grate 1 center round plate 3, center round plate 3 includes ventilation part, which is composed of several distribution on the center round plate 3 ventilation hole 4, ventilation hole 4 inside fixedly arranged with filter screen 5, for intercepting cement and only allow airflow through, to achieve the heat dissipation inside the mill; intercepting part 6, which is spliced together with the grate 1 part of the grate seam 2 is not set up, for the size of the cement greater than the grate 2 size of the barrier, ventilation part using ventilation hole 4 and filter screen 5 structure, and the filter screen 5 on the ventilation part only allows the airflow through the mill, relative to the prior art, the present application realizes the effective dissipation of heat inside the mill, thereby improving the ventilation efficiency and heat dissipation performance of the mill, the seamless splicing of intercepting part 6 and grate 1, effectively prevent the excessive particles of cement into the next bin, ensure the grinding quality and production efficiency of cement.

[0022] Further, as shown in Figures 4-5 Ventilation hole 4 is tapered design, as shown in Figure 5 Filter screen 5 is arranged at one end of the smaller aperture of ventilation hole 4, for intercepting most of the cement, to avoid the cement through the ventilation hole 4, if the particle size of the cement entering the ventilation hole 4 is less than the aperture of the filter screen 5, the tapered design of the ventilation hole 4 can avoid the cement in the ventilation hole 4.

[0023] Further, as shown in Figures 1-2 The grate seam 2 includes a plurality of center round plate 3, the outer contour of which is in a parallel state, and a vertical grate seam 8 which is perpendicular to the plurality of horizontal grate seams 7 and is connected with the horizontal grate seams 7, by setting the horizontal and vertical grate seams 7 and 8 which are connected with each other, the screening area and efficiency can be increased, so that the cement particles can be subjected to multi-directional screening effect when passing through the grate seam 2.

[0024] Further, as shown in Figures 4-5 The opening of the horizontal and vertical grate seams 7 and 8 near the side of the cement with a particle size greater than the size of the grate 2 is smaller than the opening of the side of the cement with a particle size less than the size of the grate 2, which effectively prevents the cement with a particle size greater than the size of the grate 2 from entering the next bin through the grate seam 2, ensures that the cement with a particle size less than the size of the grate 2 can pass through the grate seam 2 smoothly, and also facilitates the steel chips stuck in the grate seam 2 to fall from the grate seam 2 or pass through the grate seam 2 with the rotation of the partition plate, further reduces the probability of the grate seam 2 being blocked, and accordingly, improves the efficiency of heat dissipation inside the mill.

[0025] Further, as shown in Figures 4-5As shown, the center of the center circular plate 3 is provided with a center shaft 9, the center shaft 9 is rotatably connected with a magnetic attraction rod 10 for adsorbing the steel chips blocked in the grate seam 2, the outer end of the center shaft 9 is detachably connected with a safety cover 11 for limiting the magnetic attraction rod 10, in use, the magnetic attraction rod 10 is sleeved on the center shaft 9, and the mounting cover is connected with the center shaft 9 through bolts or threads to limit the magnetic attraction rod 10, during the working process of the mill, the magnetic attraction rod 10 is rotatably connected with the center shaft 9, when the partition plate rotates with the mill, the magnetic attraction rod 10 is in a vertical state due to its own gravity, and does not rotate with the partition plate, during the rotation of the partition plate, the magnetic attraction rod 10 can adsorb the steel chips just blocked in the grate seam 2, so as to dredge the grate seam 2, which not only helps the cement to smoothly pass through the grate seam 2 into the next chamber, but also increases the way of airflow flowing in the mill.

[0026] Further, as shown in Figures 1-2 One of the grate plates 1 is fixedly provided with a scraper 12 for cleaning the steel chips adsorbed on the magnetic attraction rod 10, the inside of the safety cover 11 is provided with an elastic element 13 connected with the magnetic attraction rod 10, as shown in Figure 5 The length of the center shaft 9 is greater than the thickness of the magnetic attraction rod 10, the magnetic attraction rod 10 can slide along the axial direction of the center shaft 9, the elastic element 13 is connected between the safety cover 11 and the magnetic attraction rod 10, which can be a spring, when the partition plate rotates, the scraper 12 is driven to rotate synchronously, as shown in Figure 5 The two sides of the scraper 12 are provided with slope surfaces, and the cross section is an obtuse triangle structure, which facilitates the scraper 12 to smoothly pass through the magnetic attraction rod 10 and the center circular plate 3, when the scraper 12 rotates to the position of the magnetic attraction rod 10, the steel chips adsorbed on the magnetic attraction rod 10 are scraped off, at the same time, the scraper 12 slides along the center shaft 9 against the magnetic attraction rod 10, expands the distance between the magnetic attraction rod 10 and the center circular plate 3, and compresses the spring, providing space for the scraper 12 to pass through, when the scraper 12 passes through smoothly, under the elastic action of the spring, the magnetic attraction rod 10 is automatically reset to adhere to the center circular plate 3 again, after the steel chips adsorbed on the magnetic attraction rod 10 are cleaned, the magnetic attraction rod 10 can continue to adsorb the steel chips just blocked in the grate seam 2, and the cycle continues, after the mill stops, the steel chips generated by the steel ball crushing in the mill are cleaned.

Claims

1. A mill partition plate for cement mill, comprising a plurality of grate plates (1) arranged in a ring shape, a plurality of grate slots (2) formed on the grate plates (1) for screening the ground cement and ventilating the inside of the mill, and a center circular plate (3) for connecting the plurality of grate plates (1), characterized in that: The center circular plate (3) comprises: A ventilation part, which is composed of a plurality of ventilation holes (4) distributed on the center circular plate (3), a filter screen (5) is fixedly arranged inside the ventilation hole (4), which is used for intercepting cement and allowing airflow to pass through only, so as to realize heat dissipation inside the mill; An intercepting part (6) which is spliced together with the grate plate (1) part without the grate gap (2) and is used for blocking the cement with particle size greater than the size of the grate gap (2).

2. The cement mill dam ring according to claim 1, wherein: The ventilation hole (4) is designed in a conical shape.

3. The cement mill diaphragm according to claim 1, characterized in that: The grate gap (2) comprises a plurality of horizontal grate gaps (7) with the outer contour of the center circular plate (3) in parallel state and vertical grate gaps (8) which are perpendicular to the plurality of horizontal grate gaps (7) and are connected with the horizontal grate gaps (7).

4. The cement mill diaphragm according to claim 3, characterized in that: The opening of the horizontal grate gap (7) and the vertical grate gap (8) near the side of the cement with particle size greater than the size of the grate gap (2) is smaller than the opening of the side of the cement with particle size less than the size of the grate gap (2).

5. The mill grate according to any one of claims 1-4, characterized in that: A center shaft (9) is installed at the center of the center circular plate (3), a magnetic attraction rod (10) for adsorbing the steel chips blocked in the grate gap (2) is rotatably connected at the center shaft (9), and a safety cover (11) for limiting the magnetic attraction rod (10) is detachably connected to the outer end of the center shaft (9).

6. The cement mill dam ring according to claim 5, wherein: A scraper (12) for cleaning the steel chips adsorbed on the magnetic attraction rod (10) is fixedly installed on the outside of one of the grate plates (1), an elastic member (13) connected with the magnetic attraction rod (10) is arranged in the safety cover (11), and the elastic member (13) is used for automatically adjusting the distance between the magnetic attraction rod (10) and the grate plate (1) when the scraper (12) cleans the magnetic attraction rod (10).

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