Ball milling device for cement processing

Abstract

The utility model relates to a ball milling device for cement processing, which comprises a grinding cylinder, a lining plate is laid on the inner wall of the grinding cylinder, a cooling pipe is clamped between the lining plate and the grinding cylinder, reciprocating cylinders are fixedly arranged on the outer sides of two end covers of the grinding cylinder, the axial direction of the reciprocating cylinders coincides with the radial direction of the grinding cylinder, and inner cavities of the reciprocating cylinders are communicated with the cooling pipe. The cooling pipe and the reciprocating cylinder are filled with cooling media, and a piston is arranged in the reciprocating cylinder. When the grinding cylinder rotates, the piston axially slides in the reciprocating cylinder, and the piston pushes the cooling medium to circulate between the cooling pipe and the reciprocating cylinder; and a heat dissipation plate for cooling the reciprocating cylinder is further fixedly arranged on the outer side of the end cover of the grinding cylinder. The device does not need to directly spray water inside or outside the grinding cylinder for cooling, a cooling medium does not need to enter the cylinder body through the bearing, and the device has good reliability and good cooling efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of ball mills, in particular to a ball mill device for cement processing. Background Art

[0002] The biggest problem facing cement ball mills is heat dissipation. Currently, two solutions are commonly used to cool cement ball mills. One is external cooling, which is cooling by spraying water outside the cylinder. This method may shorten the service life of the cylinder due to corrosion, and the cooling effect decreases after scaling on the surface of the cylinder. The high water consumption is uneconomical, and water flows everywhere to pollute the environment. The cooling effect is poor for large ball mills. The second is internal cooling, which is cooling by spraying water inside the cylinder. Although this method has obvious cooling effect, it has a direct impact on the quality of cement, such as causing dust collector bags to stick, etc. In addition, the process control technology is complex, the investment is large, the management and maintenance are large, and the cost of use is high.

[0003] Other solutions for cooling cement ball mills include a cement ball mill with heat dissipation fins disclosed in Chinese utility model patent 201320404910.7, in which heat dissipation fins are fixedly installed on the outside of the cylinder to indirectly reduce the temperature of the cement out of the mill, but the heat dissipation effect of this solution is limited; for example, a cement ball mill disclosed in Chinese utility model patent 201520065951.7 cools the cylinder by passing water through bearings at both ends of the cylinder and connecting to transverse channels in the cylinder wall. Although this solution can effectively cool down, because the bearings are always in a rotating state, it is obviously impossible to ensure their sealing for a long time, and the reliability is poor.

[0004] Therefore, a cooling solution for a cement ball mill with good cooling effect and reliability is needed. Utility Model Content

[0005] The utility model aims to provide a ball mill for cement processing, which is used to solve the above problems existing in the prior art.

[0006] In order to solve the above problems, the utility model provides a ball mill device for cement processing, comprising a grinding cylinder, the inner wall of which is paved with a lining plate, a cooling tube is sandwiched between the lining plate and the grinding cylinder, a reciprocating cylinder is fixedly provided on the outer side of the two end covers of the grinding cylinder, the axial direction of the reciprocating cylinder coincides with the radial direction of the grinding cylinder, the inner cavity of the reciprocating cylinder is communicated with the cooling tube, the cooling tube and the reciprocating cylinder are filled with a cooling medium, and a piston is provided in the reciprocating cylinder; when the grinding cylinder rotates, the piston will slide axially in the reciprocating cylinder, and the piston will push the cooling medium to circulate between the cooling tube and the reciprocating cylinder; a heat sink for cooling the reciprocating cylinder is also fixedly provided on the outer side of the end cover of the grinding cylinder.

[0007] The ball mill device for cement processing provided by the utility model also has the following technical features:

[0008] Further, a single cooling pipe is provided between two reciprocating cylinders oppositely arranged on two end caps, and two ends of the cooling pipe are respectively communicated with the top end and the bottom end of the two reciprocating cylinders.

[0009] Further, two cooling pipes are provided between two reciprocating cylinders oppositely arranged on two end caps. Two ends of one cooling pipe are respectively communicated with the top end and the bottom end of the two reciprocating cylinders, and the communication positions of two ends of the other cooling pipe are opposite to those of the former.

[0010] Further, a group of lining plates are correspondingly arranged between two reciprocating cylinders oppositely arranged on two end caps, and the group of lining plates intersects with the same straight line parallel to the grinding cylinder.

[0011] Further, feeding and discharging pipes are arranged on two end caps of the grinding cylinder, and the reciprocating cylinders and the heat dissipation plates are arranged in an equidistant array around the outer circumference of the feeding and discharging pipes.

[0012] Further, the reciprocating cylinders are embedded in the grooves of the heat dissipation plates, and the heat dissipation plates cover the end faces of the end caps.

[0013] Further, heat dissipation pipes extend outwards from the outer walls of the heat dissipation plates, and the heat dissipation pipes are densely arranged on the heat dissipation plates.

[0014] Further, grooves capable of embedding the cooling pipes are arranged on the outer walls of the lining plates, the cooling pipes are attached to the inner walls of the grooves, and buffer members are arranged between the cooling pipes and the grinding cylinder.

[0015] Further, the cooling pipes are in the shape of arc-shaped long strip plates, and a plurality of thin pipes are arranged at equal intervals along the circumferential direction of the grinding cylinder in the cooling pipes.

[0016] Further, the capacity of the reciprocating cylinders is larger than that of the cooling pipes communicated therewith.

[0017] The utility model has the following beneficial effects: during the rotation of the grinding cylinder itself, the piston will reciprocate in the reciprocating cylinder under the influence of centrifugal force and its own gravity, and push the grinding cylinder into the cooling pipe and repeat the cycle, so as to achieve the purpose of cooling the inside of the grinding cylinder; the device does not need to directly spray water for cooling inside or outside the grinding cylinder, and the cooling medium does not need to enter the cylinder body through the bearing, which has good reliability and good cooling efficiency. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is Figure 1 a sectional view of some components along line A-A in

[0020] Figure 3 is a schematic diagram of the overall structure of the cooling pipe and the reciprocating cylinder of the utility model;

[0021] Figure 4 This is a single - group structural schematic diagram of the cooling pipe, reciprocating cylinder, and heat - dissipation plate of the present utility model;

[0022] Figure 5 is Figure 4 structural decomposition diagram of;

[0023] Figure 6 is Figure 1 the sectional view along line B - B in and partial detail enlarged view;

[0024] In the figure, the reference numerals are: grinding cylinder 1, lining plate 2, cooling pipe 3, thin pipe 31, reciprocating cylinder 4, piston 41, heat - dissipation plate 5, heat - dissipation pipe 51. Specific embodiments

[0025] The present utility model will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0026] As Figures 1 to 6 In the embodiment of the ball - mill device for cement processing of the present utility model shown, the ball - mill device for cement processing includes a grinding cylinder 1. A lining plate 2 is laid on the inner wall of the grinding cylinder 1, and the lining plate 2 is fixedly connected to the inner wall of the grinding cylinder 1. The end covers at both ends of the grinding cylinder 1 are connected to the cylinder body of the grinding cylinder 1 through flanges. Feed - in and discharge pipes are provided on the end covers at both ends of the grinding cylinder 1, and the grinding cylinder 1 is supported by a bearing seat and driven to rotate by a motor; specifically, the grinding cylinder 1 and its related structures are all prior arts and will not be elaborated here.

[0027] In this actual example, a cooling pipe 3 is clamped and fixed between the lining plate 2 and the grinding cylinder 1. In this way, when a medium flows through the cooling pipe 3, it will efficiently cool the interior of the grinding cylinder 1, and will not damage the structure of the cylinder body (that is, no transverse channels are provided in the cylinder wall) to ensure the structural strength of the cylinder body.

[0028] On the outer sides of the end covers at both ends of the grinding cylinder 1, a reciprocating cylinder 4 is fixedly provided. The reciprocating cylinder 4 is arranged between the feed - in and discharge pipes on the end cover and the outer periphery of the end cover. The axial direction of the reciprocating cylinder 4 coincides with the radial direction of the grinding cylinder 1. A piston 41 is arranged in the reciprocating cylinder 4, and a piston ring is used between the piston 41 and the side wall of the reciprocating cylinder 4 to achieve a relatively good seal; thus, when the reciprocating cylinder 4 rotates with the grinding cylinder 1, the piston 41 is simultaneously affected by centrifugal force, gravity, and the resistance of the medium in the reciprocating cylinder 4. When both the centrifugal force and gravity are greater than the resistance of the medium in the reciprocating cylinder 4, the piston 41 will reciprocate in the cylinder body of the reciprocating cylinder 4, and can reciprocate once in the reciprocating cylinder 4 when the grinding cylinder 1 rotates one week.

[0029] The inner cavity of the reciprocating cylinder 4 is connected to the cooling pipe 3 through a pipeline passing through the end cap. The cooling pipe 3 and the reciprocating cylinder 4 are filled with a cooling medium. When the grinding cylinder 1 rotates, the piston 41 will axially slide within the reciprocating cylinder 4, and the piston 41 will push the cooling medium to circulate between the cooling pipe 3 and the reciprocating cylinder 4. A heat dissipation plate 5 for cooling the reciprocating cylinder 4 is also fixedly provided on the outer side of the end cap of the grinding cylinder 1, so that when the cooling medium is in the reciprocating cylinder 4, part of the heat can be taken away by the heat dissipation plate 5, and the heat dissipation plate 5 further dissipates the heat into the air. Therefore, ventilation on the heat dissipation plates 5 provided on the two end caps can achieve a better cooling effect.

[0030] During the rotation of the grinding cylinder 1 itself, the piston 41 will reciprocate within the reciprocating cylinder under the influence of centrifugal force and its own gravity, and push the grinding cylinder 1 into the cooling pipe 3 and repeat the cycle to achieve the purpose of cooling the inside of the grinding cylinder 1. This device does not need to directly spray water for cooling inside or outside the grinding cylinder 1, and the cooling medium does not need to pass through the bearing to enter the cylinder body, which has good reliability and good cooling efficiency.

[0031] In an embodiment of the present application, preferably, a single cooling pipe 3 is provided between the two reciprocating cylinders 4 oppositely arranged on the two end caps, and both ends of the cooling pipe 3 are respectively connected to the top and bottom ends of the two reciprocating cylinders 4 arranged oppositely. Thus, if there is a relatively good seal between the piston 41 and the side wall of the reciprocating cylinder 4, air inlet and outlet holes need to be provided at the end of the reciprocating cylinder 4 away from its connection with the cooling pipe 3.

[0032] In an embodiment of the present application, preferably, two cooling pipes 3 are provided between the two reciprocating cylinders 4 oppositely arranged on the two end caps. One end of one cooling pipe 3 is respectively connected to the top and bottom ends of the two reciprocating cylinders 4 arranged oppositely, and the connection positions of the two ends of the other cooling pipe 3 are opposite to it.

[0033] In the above two embodiments, when the pistons 4 in the two reciprocating cylinders 4 arranged oppositely reciprocate, the piston 41 in one of the reciprocating cylinders 4 generates suction on the cooling medium, while the piston 41 in the other reciprocating cylinder 4 generates a thrust on the cooling medium. The pistons 41 in the two reciprocating cylinders 4 can move synchronously, so that the cooling medium can circulate effectively in turn.

[0034] In an embodiment of the present application, preferably, a set of lining plates 2 is correspondingly arranged between the two reciprocating cylinders 4 oppositely arranged on the two end caps. This set of lining plates 2 intersects with the same straight line parallel to the grinding cylinder 1, that is, a set of cooling pipes 3 is correspondingly arranged within a set of axially arranged lining plates 2, so that the lining plates 2 can effectively protect the cooling pipes 3 from being damaged by grinding bodies (such as steel balls), and such an arrangement enables the reciprocating cylinder 4 to be responsible for cooling a set of lining plates 2 alone, and a good cooling effect can be achieved.

[0035] In one embodiment of the present application, preferably, the two end covers of the grinding cylinder 1 are provided with inlet and outlet pipes, and the reciprocating cylinder 4 and the heat dissipation plate 5 are arranged at equal intervals around the outer periphery of the inlet and outlet pipes to improve the cooling efficiency.

[0036] In one embodiment of the present application, preferably, the reciprocating cylinder 4 is embedded in the groove of the heat dissipation plate 5, and the heat dissipation plate 5 covers the end face of the end cover to improve the heat dissipation efficiency of the heat dissipation plate 5.

[0037] In one embodiment of the present application, preferably, the outer wall of the heat dissipation plate 5 extends outward with heat dissipation pipes 51, and the heat dissipation pipes 51 are densely arranged on the heat dissipation plate 5. The heat dissipation pipes 51 further increase the contact area between the heat dissipation plate 5 and the air, and further improve the heat dissipation efficiency of the heat dissipation plate 5.

[0038] In one embodiment of the present application, preferably, the outer wall of the lining plate 2 is provided with a groove into which the cooling pipe 3 can be embedded, the cooling pipe 3 fits the inner wall of the groove, and a buffer member is provided between the cooling pipe 3 and the grinding cylinder 1. In this way, the cooling pipe 3 is clamped and fixed by the grinding cylinder 1 and the lining plate 2 to prevent movement, and the lining plate 2 can effectively protect the cooling pipe 3 from being damaged by grinding media (such as steel balls), and has a good heat dissipation contact area to achieve a better heat dissipation effect.

[0039] In one embodiment of the present application, preferably, the cooling pipe 3 is in the shape of an arc-shaped long strip, and a plurality of thin pipes 31 are arranged at equal intervals along the circumferential direction of the grinding cylinder 1 in the cooling pipe 3, so that the cooling pipe 3 increases the contact area with the lining plate 2 in its width direction.

[0040] In one embodiment of the present application, preferably, the capacity of the reciprocating cylinder 4 is greater than the capacity of the cooling pipe 3 communicated with it, so that when the cooling medium circulates, it can completely drain from the cooling pipe 3 into the reciprocating cylinder 4 to prevent heat accumulation.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A ball milling device for cement processing, characterized in that, It includes a grinding cylinder (1). A lining plate (2) is laid on the inner wall of the grinding cylinder (1). A cooling pipe (3) is clamped between the lining plate (2) and the grinding cylinder (1). On the outer sides of the two end covers of the grinding cylinder (1), a reciprocating cylinder (4) is fixedly provided. The axial direction of the reciprocating cylinder (4) coincides with the radial direction of the grinding cylinder (1). The inner cavity of the reciprocating cylinder (4) communicates with the cooling pipe (3). The cooling pipe (3) and the reciprocating cylinder (4) are filled with a cooling medium. A piston (41) is provided in the reciprocating cylinder (4); when the grinding cylinder (1) rotates, the piston (41) will axially slide in the reciprocating cylinder (4), and the piston (41) pushes the cooling medium to circulate between the cooling pipe (3) and the reciprocating cylinder (4); on the outer side of the end cover of the grinding cylinder (1), a heat dissipation plate (5) for cooling the reciprocating cylinder (4) is also fixedly provided.

2. The ball mill device for cement processing according to claim 1, characterized in that, A single cooling pipe (3) is provided between two reciprocating cylinders (4) oppositely arranged on the two end covers. The two ends of the cooling pipe (3) are respectively communicated with the top end and the bottom end of the two reciprocating cylinders (4).

3. The ball milling device for cement processing according to claim 1, wherein, Two cooling pipes (3) are provided between two reciprocating cylinders (4) oppositely arranged on the two end covers. The two ends of one cooling pipe (3) are respectively communicated with the top end and the bottom end of the two reciprocating cylinders (4), and the communication positions of the two ends of the other cooling pipe (3) are opposite to it.

4. The ball milling device for cement processing according to claim 1, wherein, A group of lining plates (2) are correspondingly arranged between two reciprocating cylinders (4) oppositely arranged on the two end covers. This group of lining plates (2) intersects with the same straight line parallel to the grinding cylinder (1).

5. The ball milling device for cement processing according to claim 1, wherein, Feeding and discharging pipes are provided on the two end covers of the grinding cylinder (1). The reciprocating cylinders (4) and the heat dissipation plates (5) are arranged in an equidistant array around the outer circumference of the feeding and discharging pipes.

6. The ball mill device for cement processing according to claim 1, characterized in that, The reciprocating cylinder (4) is embedded in the groove of the heat dissipation plate (5), and the heat dissipation plate (5) covers the end face of the end cover.

7. The ball mill device for cement processing according to claim 1, characterized in that, A heat dissipation pipe (51) extends outward from the outer wall of the heat dissipation plate (5), and the heat dissipation pipes (51) are densely arranged on the heat dissipation plate (5).

8. The ball milling device for cement processing according to claim 1, characterized in that, The outer wall of the lining plate (2) is provided with a groove into which the cooling pipe (3) can be embedded. The cooling pipe (3) fits the inner wall of the groove, and a buffer member is provided between the cooling pipe (3) and the grinding cylinder (1).

9. The ball mill device for cement processing according to claim 1, wherein, The cooling pipe (3) is in the shape of an arc-shaped long strip plate, and a plurality of thin pipes (31) are equidistantly arranged in the cooling pipe (3) along the circumferential direction of the grinding cylinder (1).

10. The ball mill device for cement processing according to claim 1, characterized in that, The capacity of the reciprocating cylinder (4) is larger than the capacity of the cooling pipe (3) communicated with it.

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