Main shaft protection mechanism of vertical mill

Abstract

The utility model discloses a vertical mill main shaft protection mechanism which comprises a vertical mill main shaft, a spiral body is fixedly sleeved on the vertical mill main shaft, a protection shaft sleeve is rotatably sleeved on the vertical mill main shaft, the protection shaft sleeve is formed by mutually hinging two spiral plates, and a torsion spring is fixedly connected at the hinging position of the two spiral plates. The included angle between the two end points of the spiral plate and the circle center connecting line of the circle where the spiral plate is located ranges from 145 degrees to 179 degrees, the positioning rod is made of rubber materials, and the distance between the top face of the positioning rod and the top face of the supporting plate is equal to the distance between the bottom face of the limiting plate and the inner top face of the barrel body. During use, the assembly driving the positioning rod to slide is operated to drive the positioning rod to move to revoke limiting of the spiral plates, then the spiral plates are gradually rotated to move upwards, after the spiral plates are separated from the spiral bodies, the two spiral plates are moved to be taken down from the main shaft, new spiral plates are replaced, components at the top end of the vertical barrel do not need to be disassembled, operation and replacement are easy, and time is saved.

Description

Technical fields:

[0001] This utility model relates to the field of grinding technology, specifically to a vertical mill spindle protection mechanism. Background technology:

[0002] Vertical mills are high-efficiency and energy-saving fine grinding equipment, characterized by high efficiency, energy saving, environmental protection, simple operation, and easy maintenance. They play a key role in the fine grinding and regrinding processes of mineral processing plants. The main shaft of the vertical mill is fitted with a spiral body for grinding materials. The scouring and corrosion of the materials cause wear to the main shaft in the slurry. The bottom of the main shaft of the vertical mill is fitted with a protective shaft sleeve, which mainly protects the main shaft and reduces the main wear. It needs to be replaced intermittently.

[0003] The existing shaft sleeve consists of two spiral plates fixedly connected to each other. The spiral plates rotate and are sleeved on the main shaft and fixed to the main shaft by bolts. The spiral plates wear down after being immersed in slurry for a long time. The two spiral plates are fixed together as a whole. When replacing the spiral plates, all the equipment on the upper part of the cylinder needs to be removed, and the vertical mill needs to be almost reinstalled. Each replacement takes more than 2 days. Then the support plate is removed and the spiral plates are removed for replacement. The replacement of spiral plates is inconvenient, complicated and wastes a lot of time. Utility Model Content:

[0004] Therefore, the purpose of this utility model is to provide a vertical mill main shaft protection mechanism to overcome the problems of existing technology. The existing shaft protection sleeve is composed of two spiral plates fixedly connected to each other. The spiral plates rotate and are sleeved on the main shaft and fixed to the main shaft by bolts. The spiral plates are worn due to long-term immersion in slurry. The two spiral plates are fixed to each other as a whole. When replacing the spiral plates, all the equipment on the upper part of the cylinder needs to be removed, and the vertical mill needs to be almost reinstalled. Each replacement takes more than 2 days. Then the support plate is removed and the spiral plates are removed for replacement. The spiral plate replacement is inconvenient, complicated to operate, and wastes a lot of time.

[0005] This utility model is implemented by the following technical solution:

[0006] A vertical mill spindle protection mechanism includes a vertical mill spindle, a spiral body fixedly sleeved on the spindle, a support plate detachably connected to the bottom end of the spindle by bolts, a protective sleeve rotatably sleeved on the spindle, the protective sleeve being composed of two spiral plates hinged together, a torsion spring fixedly connected to the hinge of the two spiral plates, multiple positioning holes being opened on the bottom surface of the bottom spiral plate, the bottom surface of the bottom spiral plate being in contact with the top surface of the support plate, a sliding groove being opened on the bottom surface of the support plate, an assembly for driving a positioning rod to slide being slidably connected in the sliding groove, a limiting rod being provided in the sliding groove and fixedly connected to the inner top surface of the support plate, the limiting rod being able to limit the assembly for driving the positioning rod to slide, multiple positioning rods being fixedly connected to the top of the assembly for driving the positioning rod to slide, the top of the positioning rods passing through the limiting rod, the support plate and into the positioning holes in sequence and being slidably connected to the three.

[0007] Preferably, the angle between the two endpoints of the spiral plate and the center of the circle containing the spiral plate is 145°-179°.

[0008] Preferably, the positioning rod is made of rubber material.

[0009] Preferably, the component that drives the positioning rod to slide includes a barrel body slidably disposed in a groove, a torsion spring fixedly connected between the bottom surface of the barrel body and the top surface of the support plate, the top surface of the barrel body being fixedly connected to the positioning rod, a limit plate being fitted on multiple positioning rods, the top surface of the limit plate being in contact with the top surface of the support plate, the limit plate being positioned directly above the limit rod, and a sealing ring being slidably fitted onto the outer wall of the barrel body, the sealing ring being fixedly embedded in the side wall of the support plate.

[0010] Preferably, the distance between the top surface of the positioning rod and the top surface of the support plate is equal to the distance between the bottom surface of the limiting plate and the top surface of the barrel body.

[0011] Preferably, the distance from the top surface of the barrel to the top surface of the sealing ring is greater than the distance from the bottom surface of the limiting plate to the top surface of the barrel.

[0012] Advantages of this invention: The bushing is composed of two spiral plates hinged together. The component that drives the positioning rod to slide in the support plate at the bottom of the spiral plate limits the spiral plate by pushing the positioning rod. When replacing the spiral plate, it is only necessary to operate the component that drives the positioning rod to slide to move the positioning rod to remove the limitation on the spiral plate, and then gradually rotate the spiral plate to move it upward. After separating from the spiral body, the two spiral plates are pried off the main shaft for replacement with new spiral plates. There is no need to disassemble the parts at the top of the vertical cylinder. The operation is simple, the replacement is simple, and it saves time. Attached image description:

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural diagram of the present invention;

[0015] Figure 2 This is a perspective view of the structure described in this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the spiral plate 3 described in this utility model;

[0017] Figure 4 This is a structural diagram of an embodiment of the component that drives the positioning rod to slide, as described in this utility model;

[0018] Figure 5 The structure described in this utility model Figure 1 A magnified view of a portion of the image.

[0019] In the diagram: 1. Vertical mill spindle; 2. Support plate; 3. Spiral plate; 4. Torsion spring; 5. Positioning hole; 6. Positioning rod; 7. Slide groove; 8. Limiting rod; 9. Barrel body; 10. Limiting plate; 11. Tension spring; 12. Sealing ring. Detailed implementation method:

[0020] To make the objectives and advantages of this utility model clearer, the utility model will be further described below with reference to the embodiments; it should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0023] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figures 1-5 As shown, this utility model provides the following technical solution: a vertical mill spindle protection mechanism, including a vertical mill spindle 1, a spiral body fixedly sleeved on the vertical mill spindle 1, a support plate 2 detachably connected to the bottom end of the vertical mill spindle 1 by bolts, a protective sleeve rotatably sleeved on the vertical mill spindle 1, the protective sleeve being composed of two spiral plates 3 hinged together, a torsion spring 4 fixedly connected at the hinge of the two spiral plates 3, multiple positioning holes 5 opened on the bottom surface of the bottom spiral plate 3, the bottom surface of the bottom spiral plate 3 being in contact with the top surface of the support plate 2, a sliding groove 7 opened on the bottom surface of the support plate 2, an assembly for driving the positioning rod to slide slidably connected in the sliding groove 7, a limiting rod 8 fixedly connected to the inner top surface of the support plate 2 in the sliding groove 7, the limiting rod 8 can limit the assembly for driving the positioning rod to slide, multiple positioning rods 6 fixedly connected to the top of the assembly for driving the positioning rod to slide, the top of the positioning rod 6 passing through the limiting rod 8, the support plate 2 in sequence and entering the positioning hole 5 and slidably connected to the three.

[0025] Please combine Figure 1 As shown, the spiral plate, after being immersed in slurry for a long time, wears out and needs to be replaced. First, the worker pulls the component that drives the positioning rod to slide, causing the positioning rod 6 to slide out of the positioning hole 5 and remove the restriction on the bottom spiral plate 3. Then, the spiral plate 3 is rotated upwards to gradually separate from the spiral body. When the spiral plate 3 is completely separated from the spiral body, the two spiral plates 3 are swung to rotate and gradually separate from the vertical mill main shaft 1. Then, a new spiral plate 3 is replaced. During the rotation of the spiral plate 3, the torsion spring 4 will deform, clamping the new spiral plate 3. After that, the spiral plate 3 is rotated to rotate the spiral plate 3 onto the spiral body of the vertical mill main shaft 1. The bottom of the vertical mill main shaft 1 is protected. Then, the component that drives the positioning rod to slide is released. The component that drives the positioning rod to slide moves and moves the positioning rod 6 to insert into the positioning hole 5 of the bottom spiral plate 3, limiting the bottom spiral plate 3 so that the spiral plate 3 cannot rotate. When the spiral plate 3 is between the spiral bodies, the spiral bodies limit the spiral plate 3 so that the two spiral plates 3 cannot rotate relative to each other. Thus, the spiral plate 3 between the spiral bodies of the vertical mill main shaft 1 will not separate from the vertical mill main shaft 1 during the working rotation of the vertical mill main shaft 1, thus protecting the vertical mill main shaft 1. There is no need to disassemble the parts at the top of the vertical cylinder. The operation is simple, the replacement is simple, and it saves time.

[0026] The angle between the two ends of the spiral plate 3 and the center of the circle in which the spiral plate 3 is located is 145°-179°, which makes it easy to clamp the two spiral plates 3 that are rotating relative to each other onto the main shaft 1 of the vertical mill or remove them from the shaft.

[0027] The positioning rod 6 is made of rubber material, which improves the sealing of the connection between the positioning rod 6 and the support plate 2, and effectively prevents slurry from entering the chute 7 and affecting the operation of the components that drive the positioning rod to slide.

[0028] Please combine Figure 1 , Figure 4 , Figure 5 As shown in the embodiment of the component that drives the positioning rod to slide, the component that drives the positioning rod to slide includes a barrel 9 that is slidably disposed in the slide groove 7. A torsion spring 4 is fixedly connected between the inner bottom surface of the barrel 9 and the inner top surface of the support plate 2. The inner top surface of the barrel 9 is fixedly connected to the positioning rod 6. A limiting plate 10 is sleeved on multiple positioning rods 6. The top surface of the limiting plate 10 is in contact with the inner top surface of the support plate 2. The limiting plate 10 is disposed directly above the limiting rod 8. A sealing ring 12 is slidably sleeved on the outer wall of the barrel 9. The sealing ring 12 is fixedly embedded in the side wall of the support plate 2.

[0029] Please combine Figure 1 As shown, when the spiral plate 3 needs to be replaced during use, the operator pulls the barrel 9 to move it. The barrel 9 moves the positioning rod 6 and gradually slides it out of the positioning hole 5, thus removing the restriction on the bottom spiral plate 3. The movement of the barrel 9 causes the tension spring 11 to deform. The positioning rod 6 moves the limiting plate 10 and gradually moves it to fit against the limiting rod 8 before stopping. The setting of the limiting rod 8 serves to limit the limiting plate 10, thereby indirectly limiting the positioning rod 6. The setting of the sealing ring 12 provides a seal against relative sliding between the support plate 2 and the barrel 9, effectively preventing slurry from entering the chute 7 from the bottom.

[0030] The distance between the top surface of the positioning rod 6 and the top surface of the support plate 2 is equal to the distance between the bottom surface of the limiting plate 10 and the inner top surface of the barrel 9. The barrel 9 moves the limiting plate 10 through the positioning rod 6 and gradually stops moving after it comes into contact with the top surface of the limiting rod 8. When the top surface of the limiting rod 8 comes into contact with the bottom surface of the limiting plate 10, the top surface of the positioning rod 6 and the top surface of the support plate 2 are on the same plane, which effectively ensures the sealing of the connection between the positioning rod 6 and the support plate 2 and prevents the positioning rod 6 from slipping off the support plate 2.

[0031] The distance from the top surface of the barrel 9 to the top surface of the sealing ring 12 is greater than the distance from the bottom surface of the limiting plate 10 to the inner top surface of the barrel 9. During the sliding process, when the bottom surface of the limiting plate 10 is in contact with the top surface of the limiting rod 8, the side wall of the barrel 9 is still in contact with the sealing ring 12. The barrel 9 will not separate from the sealing ring 12, and the sealing ring 12 ensures the sealing between the support plate 2 and the barrel 9.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vertical mill spindle protection mechanism, comprising a vertical mill spindle, wherein a spiral body is fixedly sleeved on the vertical mill spindle, and a support plate is detachably connected to the bottom end of the vertical mill spindle by bolts, characterized in that: The vertical mill spindle is fitted with a protective sleeve, which is composed of two spiral plates hinged together. A torsion spring is fixedly connected to the hinge of the two spiral plates. The bottom surface of the bottom spiral plate has multiple positioning holes, and the bottom surface of the bottom spiral plate is in contact with the top surface of the support plate. The bottom surface of the support plate has a sliding groove, and an assembly that drives the positioning rod to slide is slidably connected in the sliding groove. A limiting rod is fixedly connected to the inner top surface of the support plate in the sliding groove. The limiting rod can limit the assembly that drives the positioning rod to slide. Multiple positioning rods are fixedly connected to the top of the assembly that drives the positioning rod to slide. The top of the positioning rod passes through the limiting rod, the support plate and the positioning hole in sequence and is slidably connected to the three.

2. The vertical mill spindle protection mechanism according to claim 1, characterized in that: The angle between the two endpoints of the spiral plate and the center of the circle containing the spiral plate is 145°-179°.

3. The vertical mill spindle protection mechanism according to claim 2, characterized in that: The positioning rod is made of rubber material.

4. The vertical mill spindle protection mechanism according to any one of claims 1-3, characterized in that: The component that drives the positioning rod to slide includes a barrel body slidably disposed in a groove. A torsion spring is fixedly connected between the bottom surface of the barrel body and the top surface of the support plate. The top surface of the barrel body is fixedly connected to the positioning rod. Limiting plates are fitted on multiple positioning rods. The top surface of the limiting plates is in contact with the top surface of the support plate. The limiting plates are positioned directly above the limiting rods. A sealing ring is slidably fitted onto the outer wall of the barrel body. The sealing ring is fixedly embedded in the side wall of the support plate.

5. The vertical mill spindle protection mechanism according to claim 4, characterized in that: The distance between the top surface of the positioning rod and the top surface of the support plate is equal to the distance between the bottom surface of the limiting plate and the top surface of the barrel.

6. The vertical mill spindle protection mechanism according to claim 5, characterized in that: The distance from the top surface of the barrel to the top surface of the sealing ring is greater than the distance from the bottom surface of the limiting plate to the top surface inside the barrel.

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