Anti-falling device for manhole cover of ball mill

Abstract

The invention discloses an anti-falling device for a manhole cover of a ball mill. The anti-falling device comprises the manhole cover, a ball mill barrel and a limiting assembly. A manhole is formed in the ball mill barrel, a manhole cover limiting piece is arranged on the inner wall of the manhole, and the manhole cover is detachably arranged in the manhole and limited by the manhole cover limiting piece. The limiting assembly comprises a limiting fixing piece and a limiting executing piece, the limiting fixing piece is fixedly connected with the surface of the ball mill barrel, the two ends of the limiting executing piece are contained in the limiting fixing piece, and the middle of the limiting executing piece is detachably connected with the manhole cover. The anti-falling device for the manhole cover of the ball mill can be applied to the ball mill rotating circularly, the manhole cover is prevented from loosening and falling off when the manhole cover of the ball mill operates in a sealed and fixed mode, potential safety hazards and the situation that materials and steel balls are thrown out and the materials are scattered are avoided, the working efficiency of the ball mill is improved, and the troubleshooting time is shortened.

Description

Technical Field

[0001] This invention relates to the field of ball mill technology, and more specifically to a ball mill manhole cover anti-fall-off device. Background Technology

[0002] Ball mills are core equipment in material crushing operations. The current method of fixing manhole covers in ball mills allows the fixing bolts to gradually loosen due to vibrations during operation, leading to gaps or openings in the manhole cover at its installation position, or even the cover falling off entirely. This results in a large amount of steel balls and material being thrown out. The throwing out of steel balls and material can cause adverse consequences such as personnel safety issues, equipment damage, and production interruptions. Furthermore, the cleaning and handling of steel balls and material is time-consuming, resulting in significant production losses. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a ball mill manhole cover anti-fall-off device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a ball mill manhole cover anti-fall-off device, comprising: Manhole cover; A ball mill cylinder has a manhole, and a manhole cover limiting member is provided on the inner wall of the manhole. The manhole cover is detachably arranged in the manhole and limited by the manhole cover limiting member. A limiting assembly includes a limiting fixing member and a limiting actuator. The limiting fixing member is fixedly connected to the surface of the ball mill cylinder. Both ends of the limiting actuator are accommodated within the limiting fixing member. The middle part of the limiting actuator is detachably connected to the manhole cover to limit the manhole cover.

[0005] According to one embodiment of the present invention, the manhole is formed on the side wall of the ball mill cylinder.

[0006] According to one embodiment of the present invention, the manhole cover includes a main body and an edge portion integrally formed around the outer edge of the main body, wherein the top surface of the edge portion is lower than the top surface of the main body, and the bottom surface of the edge portion is coplanar with the bottom surface of the main body.

[0007] According to one embodiment of the present invention, the manhole cover limiting member is a limiting baffle, the limiting baffle is arranged around the inner wall of the manhole, the limiting baffle extends in a direction away from the inner wall of the manhole, and the bottom surface of the limiting baffle abuts against the top surface of the edge portion of the manhole cover.

[0008] According to one embodiment of the present invention, a U-shaped block is provided on the top surface of the main body of the manhole cover. The U-shaped block includes a pair of vertically arranged parallel sections and a transverse connecting section connecting the vertical sections. The vertical sections and the transverse connecting section form a first U-shaped opening. Each vertical section is divided into a connecting section near the outer side and a suspended section near the inner side along its length direction. The connecting section is fixedly connected to the top surface of the main body of the manhole cover. A gap is formed between the bottom surface of the suspended section and the top surface of the main body of the manhole cover.

[0009] According to one embodiment of the present invention, the limiting actuator is an arc-shaped pressure beam that spans the manhole along the circumferential direction of the ball mill cylinder. The middle part of the arc-shaped pressure beam is connected to the manhole cover through a connector, and the ends of the arc-shaped pressure beam abut against the surface of the ball mill cylinder.

[0010] According to one embodiment of the present invention, the arc-shaped pressure beam comprises: A pair of relatively spaced arc-shaped pressure beam bodies, each arc-shaped pressure beam body comprising an arc-shaped portion and a vertical connecting portion, wherein the vertical connecting portion is symmetrically disposed at both ends of the arc-shaped portion and abuts against the surface of the ball mill cylinder; A connecting plate, the two ends of which are respectively connected to the middle of the arc-shaped part of the pair of arc-shaped pressure beam bodies, and the connecting plate is provided with connecting plate connecting holes; A pair of connecting rods are symmetrically arranged on both sides of the connecting plate and are respectively connected to the arc-shaped portion of the pair of arc-shaped pressure beam bodies.

[0011] According to one embodiment of the present invention, the connector is a square head bolt and a nut. The square head bolt includes a square head and a screw connected to the square head. The square head is slidably inserted into the gap through the first U-shaped opening. The top surface of the square head abuts against the top surface of the main body of the manhole cover, and the bottom surface of the square head abuts against the bottom surface of the suspended section. The screw passes through the connecting hole of the connecting plate and is locked with the nut.

[0012] According to one embodiment of the present invention, the limiting and fixing member is a U-shaped limiting block disposed on the ball mill cylinder. The limiting block includes a second U-shaped opening and is disposed on both sides of a pair of opposite sides of the manhole extending in the axial direction of the ball mill cylinder. The vertical connecting portion of the arc-shaped pressure beam body is accommodated in the second U-shaped opening of the limiting block.

[0013] According to one embodiment of the present invention, the second U-shaped opening of the limiting block is configured to face the manhole.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: The manhole cover of this invention is configured to be disposed within the manhole and limited by a manhole cover limiting member, preventing the manhole cover from falling off in a direction perpendicular to the ball mill cylinder. The limiting member is fixedly connected to the surface of the ball mill cylinder, and both ends of the limiting actuator are accommodated within the limiting member, with the middle part of the limiting actuator connected to the manhole cover. This allows the limiting actuator to be limited by the limiting member, thereby limiting the manhole cover and effectively preventing horizontal displacement of the manhole cover within its mounting plane when the ball mill rotates. This advantageously prevents the manhole cover from sliding and creating gaps or openings, and prevents steel balls and materials from being thrown out of the ball mill through the manhole cover.

[0015] The ball mill manhole cover anti-fall-off device of the present invention can be applied to a circular rotating ball mill. It prevents the manhole cover from loosening and falling off during the operation of the ball mill manhole cover when it is sealed and fixed, avoiding the safety hazards of material and steel balls being thrown out and the situation of material spillage, thereby improving the working efficiency of the ball mill and reducing the time for fault repair. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic perspective view of the ball mill manhole cover anti-fall-off device of the present invention; Figure 2 This is a schematic top view of the ball mill manhole cover anti-fall-off device of the present invention; Figure 3 This is a schematic side cross-sectional view of the ball mill manhole cover anti-fall-off device of the present invention; Figure 4 This is another schematic side cross-sectional view of the ball mill manhole cover anti-fall-off device of the present invention; Figure 5 This is another schematic perspective view of the ball mill manhole cover anti-fall-off device of the present invention, which shows a partial view of the ball mill; Figure 6 A schematic top view of the manhole cover of the ball mill manhole cover anti-fall-off device of the present invention; Figure 7 A schematic perspective view of the manhole cover of the ball mill manhole cover anti-fall-off device of the present invention; Figure 8 This is another schematic perspective view of the ball mill manhole cover anti-fall-off device of the present invention. Detailed Implementation

[0018] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0019] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion; the terms "first," "second," etc., used in the specification, claims, and accompanying drawings are used to distinguish different objects, not to describe a particular order. "A plurality of" means two or more, unless otherwise explicitly specified.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “lateral,” “longitudinal,” and “vertical” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0021] In the description and claims of this invention and the foregoing drawings, when an element is referred to as "fixed to," "mounted to," "disposed on," or "connected to" another element, it can be located directly or indirectly on that other element. For example, when an element is referred to as "connected to" another element, it can be directly or indirectly connected to that other element.

[0022] like Figures 1-5As shown, the present invention provides a ball mill manhole cover anti-detachment device. This ball mill manhole cover anti-detachment device includes a manhole cover 20, a ball mill cylinder 10, and a limiting assembly. A manhole 11 is provided on the ball mill cylinder 10, and a manhole cover limiting member 12 is provided on the inner wall of the manhole 11. The manhole cover 20 is detachably arranged within the manhole 11 and limited by the manhole cover limiting member 12. The limiting assembly includes a limiting fixing member 43 and a limiting actuating member 42. The limiting fixing member 43 is fixedly connected to the surface of the ball mill cylinder 10, both ends of the limiting actuating member 42 are accommodated within the limiting fixing member 43, and the middle part of the limiting actuating member 42 is detachably connected to the manhole cover 20 to limit the manhole cover 20.

[0023] In a preferred embodiment, such as Figure 5 As shown, the manhole 11 is located on the side wall of the ball mill cylinder 10, and the manhole cover 20 is also located on the side wall of the ball mill cylinder 10. This design allows for direct access to the internal grinding area, facilitating observation and maintenance.

[0024] In a preferred embodiment, such as Figure 7 As shown, the manhole cover 20 includes a main body 21 and an edge portion 22 integrally formed around the outer edge of the main body 21. The top surface of the edge portion 22 is lower than the top surface of the main body 21, forming a stepped structure between the edge portion 22 and the main body 21. Furthermore, the bottom surface of the edge portion 22 is coplanar with the bottom surface of the main body 21, together forming a continuous bottom surface of the manhole cover 20.

[0025] In a preferred embodiment, such as Figure 3 , Figure 4 as well as Figure 7 As shown, the manhole cover limiting member 12 is a limiting baffle 12, which is arranged around the inner wall of the manhole 11. The limiting baffle 12 extends in a direction away from the inner wall of the manhole 11, and the bottom surface of the limiting baffle 12 abuts against the top surface of the edge portion 22 of the manhole cover 20. The limiting baffle 12 can prevent the manhole cover 20 from falling off in a direction perpendicular to the ball mill cylinder 10.

[0026] Those skilled in the art will understand that the limiting baffle 12 arranged around the inner wall of the manhole 11 forms an opening (not shown), the length of which should be greater than the width of the manhole cover 20, so that the manhole cover 20 can be inserted into the manhole 11 through the opening. Furthermore, the manhole cover 20 has mounting dimensions that match the opening, ensuring that the bottom surface of the limiting baffle 12 abuts against the top surface of the edge portion 22 of the manhole cover 20, thereby sealing the manhole 11.

[0027] In a preferred embodiment, such as Figures 6 to 8As shown, a U-shaped block 23 is provided on the top surface of the main body 21 of the manhole cover 20. The U-shaped block 23 includes a pair of vertically arranged parallel sections 231 and a transverse connecting section 232 connecting the vertical sections 231. The pair of vertical sections 231 and the transverse connecting section 232 form a first U-shaped opening 233. Each vertical section 231 is divided into a connecting section near the outer side and a suspended section near the inner side along its length. The connecting section is fixedly connected to the top surface of the main body 21 of the manhole cover 20, and a gap 70 is formed between the bottom surface of the suspended section and the top surface of the main body 21 of the manhole cover 20. The connecting section of the vertical section 231 can be welded to the top surface of the main body 21 of the manhole cover 20 using welding material. The welding material can be the same material or material system as the manhole cover 20 and the U-shaped block 23, or other welding materials, to achieve the purpose of fixing the connecting section of the vertical section 231 to the manhole cover 20, thereby fixing the U-shaped block 23 to the manhole cover 20.

[0028] In a preferred embodiment, such as Figure 1 As shown, the limiting actuator 42 is an arc-shaped pressure beam 42 that spans the manhole 11 along the circumferential direction of the ball mill cylinder 10. The middle part of the arc-shaped pressure beam 42 is connected to the manhole cover 20 through a connector, and the ends of the arc-shaped pressure beam 42 abut against the surface of the ball mill cylinder 10.

[0029] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the arc-shaped pressure beam 42 includes a pair of arc-shaped pressure beam bodies 421 arranged opposite to each other, a connecting plate 422, and a pair of connecting rods 423. The arc-shaped pressure beam body 421 includes an arc-shaped portion 424 and a vertical connecting portion 425. The vertical connecting portion 425 is symmetrically arranged at both ends of the arc-shaped portion 424 and abuts against the surface of the ball mill cylinder 10. The two ends of the connecting plate 422 are respectively connected to the middle of the arc-shaped portion 424 of the pair of arc-shaped pressure beam bodies 421, and the connecting plate 422 is provided with connecting plate connecting holes (not shown). The pair of connecting rods 423 are symmetrically arranged on both sides of the connecting plate 422 and are respectively connected to the arc-shaped portion 424 of the pair of arc-shaped pressure beam bodies 421.

[0030] In a preferred embodiment, such as Figure 3 and Figure 8As shown, the connecting parts are a square head bolt 50 and a nut 60. The square head bolt 50 includes a square head 51 and a threaded rod 52 connected to the square head 51. The square head 51 is slidably inserted into the gap 70 through the first U-shaped opening 233. The top surface of the square head 51 abuts against the top surface of the main body 21 of the manhole cover 20, and the bottom surface of the square head 51 (the surface directly connected to the threaded rod 52) abuts against the bottom surface of the suspended section. The threaded rod 52 passes through the connecting hole of the connecting plate 422 and is locked with the nut 60, so that the manhole cover 20 is tightly connected to the arc-shaped pressure beam 42 by the square head bolt 50 and the hexagonal nut 60.

[0031] When the ball mill is making circular motion, the screw 52 pulls the manhole cover 20 upward, so that the top surface of the edge 22 of the manhole cover 20 abuts tightly against the bottom surface of the limiting baffle 12, thereby sealing the manhole cover 20 against the manhole 11. To achieve a better seal, a sealing ring can also be installed on the outer edge of the main body 21.

[0032] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the limiting and fixing member 43 is a U-shaped limiting block 43 disposed on the ball mill cylinder 10. The limiting block 43 includes a second U-shaped opening 431 and is disposed on both sides of a pair of opposite sides of the manhole 11 extending in the axial direction of the ball mill cylinder 10. The vertical connecting portion 425 of the arc-shaped pressure beam body 421 is accommodated in the second U-shaped opening 431 of the limiting block 43, and the second U-shaped opening 431 of the limiting block is configured to face the manhole 11. In a preferred embodiment, the U-shaped limiting block 43 is welded to the ball mill cylinder 10.

[0033] like Figure 2 As shown, the U-shaped limiting block 43 includes a pair of opposing vertical sidewalls 432 and a transverse connecting wall 433 connecting the pair of vertical sidewalls 432. The pair of vertical sidewalls 432 and the transverse connecting wall 433 form a second U-shaped opening 431. Figure 1 As shown, a pair of vertical sidewalls 432 and a transverse connecting wall 433 form a three-sided enclosure around the vertical connecting portion 425 of the arc-shaped pressure beam body 421, which can advantageously restrict the up-down and left-right movement of the arc-shaped pressure beam 42. In a preferred embodiment, a 1mm gap is maintained between the vertical connecting portion 425 of the arc-shaped pressure beam body 421 and the vertical sidewalls 432 and transverse connecting walls 433 of the U-shaped limiting block 43. This gap can buffer the impact energy between the vertical connecting portion 425 and the vertical sidewalls 432 and transverse connecting walls 433, protecting the component from damage.

[0034] like Figure 1 and Figure 2 as well as Figures 6-8As shown, in a preferred embodiment, the present invention provides two relatively spaced arc-shaped pressure beams 42, and simultaneously provides four U-shaped limiting blocks 43 and two matching U-shaped blocks 23 to better limit the manhole cover 20.

[0035] When a ball mill performs circular motion, it generates a large centripetal force. If the bolts on the manhole cover 20 loosen, it can easily shift horizontally within its plane. Sliding of the manhole cover 20 in all directions can cause misalignment within its mounting plane, creating gaps or openings, which can lead to the steel balls and materials being thrown out of the ball mill. This invention connects the manhole cover 20 to the arc-shaped pressure beam 42 using a connector. A limiting block 43 surrounds the vertical connecting portion 425 of the arc-shaped pressure beam body 421 on three sides. Even if the bolts 50 loosen, the vertical connecting portion 425 of the arc-shaped pressure beam 42 can still be restricted from moving up, down, left, and right, ensuring that it remains within the limiting block 43 without displacement. This effectively prevents the manhole cover 20 from sliding and creating gaps or openings, and prevents materials from being thrown out of the ball mill through the manhole cover 20.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of the different aspects of the invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A device for preventing the manhole cover of a ball mill from falling off, characterized in that, include: Manhole cover; A ball mill cylinder has a manhole, and a manhole cover limiting member is provided on the inner wall of the manhole. The manhole cover is detachably arranged in the manhole and limited by the manhole cover limiting member. A limiting assembly includes a limiting fixing member and a limiting actuator. The limiting fixing member is fixedly connected to the surface of the ball mill cylinder. Both ends of the limiting actuator are accommodated within the limiting fixing member. The middle part of the limiting actuator is detachably connected to the manhole cover to limit the manhole cover.

2. The ball mill manhole cover anti-fall-off device according to claim 1, characterized in that, The manhole is located on the side wall of the ball mill cylinder.

3. The ball mill manhole cover anti-fall-off device according to claim 1, characterized in that, The manhole cover includes a main body and an edge portion integrally formed around the outer edge of the main body. The top surface of the edge portion is lower than the top surface of the main body, and the bottom surface of the edge portion is coplanar with the bottom surface of the main body.

4. The ball mill manhole cover anti-fall-off device according to claim 3, characterized in that, The manhole cover limiting member is a limiting baffle, which is arranged around the inner wall of the manhole and extends in a direction away from the inner wall of the manhole. The bottom surface of the limiting baffle abuts against the top surface of the edge portion of the manhole cover.

5. The ball mill manhole cover anti-fall-off device according to claim 3, characterized in that, A U-shaped block is provided on the top surface of the main body of the manhole cover. The U-shaped block includes a pair of vertically arranged parallel parts and a transverse connecting part connecting the vertical parts. The vertical parts and the transverse connecting part form a first U-shaped opening. Each vertical part is divided into a connecting section near the outside and a suspended section near the inside along its length direction. The connecting section is fixedly connected to the top surface of the main body of the manhole cover. A gap is formed between the bottom surface of the suspended section and the top surface of the main body of the manhole cover.

6. The ball mill manhole cover anti-fall-off device according to claim 5, characterized in that, The limiting actuator is an arc-shaped pressure beam that spans the manhole along the circumferential direction of the ball mill cylinder. The middle part of the arc-shaped pressure beam is connected to the manhole cover through a connector, and the ends of the arc-shaped pressure beam abut against the surface of the ball mill cylinder.

7. The ball mill manhole cover anti-fall-off device according to claim 6, characterized in that, The arc-shaped pressure beam includes: A pair of relatively spaced arc-shaped pressure beam bodies, each arc-shaped pressure beam body comprising an arc-shaped portion and a vertical connecting portion, wherein the vertical connecting portion is symmetrically disposed at both ends of the arc-shaped portion and abuts against the surface of the ball mill cylinder; A connecting plate, the two ends of which are respectively connected to the middle of the arc-shaped part of the pair of arc-shaped pressure beam bodies, and the connecting plate is provided with connecting plate connecting holes; A pair of connecting rods are symmetrically arranged on both sides of the connecting plate and are respectively connected to the arc-shaped portion of the pair of arc-shaped pressure beam bodies.

8. The ball mill manhole cover anti-fall-off device according to claim 7, characterized in that, The connector is a square-headed bolt and a nut. The square-headed bolt includes a square head and a screw connected to the square head. The square head is slidably inserted into the gap through the first U-shaped opening. The top surface of the square head abuts against the top surface of the main body of the manhole cover, and the bottom surface of the square head abuts against the bottom surface of the suspended section. The screw passes through the connecting hole of the connecting plate and is locked with the nut.

9. The ball mill manhole cover anti-fall-off device according to claim 7, characterized in that, The limiting and fixing component is a U-shaped limiting block installed on the ball mill cylinder. The limiting block includes a second U-shaped opening and is installed on both sides of a pair of opposite sides of the manhole extending along the axial direction of the ball mill cylinder. The vertical connecting part of the arc-shaped pressure beam body is accommodated in the second U-shaped opening of the limiting block.

10. The ball mill manhole cover anti-fall-off device according to claim 9, characterized in that, The second U-shaped opening of the limiting block is configured to face the manhole.

Images