Conical ball mill end arc liner

Abstract

The utility model discloses a kind of conical ball mill end arc surface lining plate, including first skeleton, the first skeleton is arc, the both ends of the first skeleton are extended with second skeleton, the first skeleton is connected with the second skeleton, first rubber part is equipped on the first skeleton, second rubber part is equipped on the second skeleton, third rubber part is equipped between the first rubber part with the second rubber part, the third rubber part is connected with the first rubber part and the second rubber part, the second skeleton and the second rubber part are all penetrated with fixed hole. The utility model solves the problem of tearing and falling off after the arc rubber of the arc surface lining plate of the conical ball mill end in the prior art is worn out.

Description

Technical Field

[0001] This utility model relates to the field of rubber liner technology, and in particular to an arc-shaped liner at the end of a conical ball mill. Background Technology

[0002] End liners are a crucial component of conical ball mills, primarily serving to protect the mill's end caps. For example, Chinese Utility Model Publication No. CN201692854U discloses a special arc-shaped end liner for conical ball mills. However, during installation, due to structural features, gaps may exist around the liner at the mill end. In this case, a filling strip is needed to fill the gap between the end liner and the mill's inner wall. However, due to the structural characteristics of the mill end, and the fact that the vulcanized filling strip is relatively hard and straight, installation is not only laborious but also results in poor adhesion to the mill's inner wall after installation, leading to unsatisfactory filling results. Based on this prior art, Chinese Utility Model Patent Publication No. CN202490654U discloses a ball mill end filling strip, which has the same curvature as the end of the ball mill. It is not only easy to install, saving time and effort, but also, after installation, the curved surface of the filling strip fits tightly with the inner wall of the ball mill, and the top surface of the filling strip is in close contact with the end liner of the ball mill, resulting in good filling effect and making the end liner after the filling strip is installed more reliable and tight.

[0003] In the application of the aforementioned existing technologies, it was found that since the ends of conical ball mills are mostly curved, the existing end curved surface liners are all designed to conform to the curved surface of the ball mill end in order to fit the end of the ball mill. In this process, after the working surface of the end liner is worn, its internal stress will change, especially the tensile force borne by the curved surface will increase, causing the rubber part of the liner to tear and break off, thereby affecting the stability of the fixed end of the liner. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where the arc-shaped rubber of the end arc-shaped liner of a conical ball mill tears and breaks off after wear.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A conical ball mill end arc-shaped liner includes a first frame, which is arc-shaped, and second frames extending from both ends of the first frame. The first frame is connected to the second frame. The first frame is provided with a first rubber part, and the second frame is provided with a second rubber part. A third rubber part is provided between the first rubber part and the second rubber part. The third rubber part is engaged with both the first rubber part and the second rubber part. The second frame and the second rubber part are both provided with through fixing holes.

[0006] Preferably, both the first rubber portion and the second rubber portion are engaged with the third rubber portion using a wedge-shaped surface.

[0007] Preferably, the cross-section of the third rubber portion is trapezoidal.

[0008] Preferably, a reinforcing rib is provided between the first frame and the second frame.

[0009] Preferably, the fixing hole has countersunk holes at both ends, and the countersunk holes are located on the second rubber part.

[0010] The beneficial effects proposed by this utility model are as follows: The first frame forms an arc angle based on the characteristics of the end arc surface. During this process, the second frame, arranged at both ends of the first frame, extends the stress surface of the first frame to both sides of the arc. The first and second frames can be integrally formed from sheet metal or connected by welding. This method allows the device to adapt to the angle of the end arc surface while extending the stress surface, thus dispersing the stress on the first frame and improving the strength of the frame structure. The first and second rubber parts are respectively arranged on the first and second frames. The first and second rubber parts are used for contact with grinding balls and materials during the operation of the ball mill. During this process, the first and second rubber parts will be worn. Since the third rubber part is located between the first and second rubber parts, and the three are connected by an interference fit, the third rubber part is squeezed by the first and second rubber parts. When wear occurs, the squeezing force on the third rubber part decreases, generating a reverse elastic force that acts on the first and second rubber parts respectively, squeezing them to counteract the deformation caused by wear and tear. This method allows the third rubber part to temporarily act as an emergency measure when the first and second rubber parts experience wear and cracking, reducing the risk of detachment due to further cracking of the first and second rubber parts. Furthermore, when the third rubber part experiences wear and cracking, the first and second rubber parts can also apply compressive force to it, reducing the risk of gradual separation and deformation caused by the cracks. Through these methods, the service life of the first, second, and third rubber parts is improved, and the risk of detachment due to cracks is reduced.

[0011] Furthermore, the fixing hole is used to fix the device at the end position of the ball mill. It should be noted that the fixing hole only penetrates the second frame and the second rubber part. Since the first frame and the first rubber part are arc-shaped, it is not conducive to the fixed connection. In this process, the fixing bolt locks the second frame and the second rubber part at the arc corner of the end of the ball mill. Under the traction of the second frame, the first frame drives the first rubber part to fit tightly against the arc corner, so that the device can stably connect the end liner and the cylinder liner, thereby replacing the filler strip used in the prior art, which has a longer service life and easier installation. Attached Figure Description

[0012] Figure 1 This is a perspective view of an arc-shaped end liner for a conical ball mill proposed in this utility model; Figure 2 This is a side sectional view of an arc-shaped end liner for a conical ball mill proposed in this utility model; Figure 3 This is a partially enlarged side sectional view A of a conical ball mill end arc-shaped liner proposed in this utility model; Figure 4 This is a schematic diagram showing the force distribution between the first and third rubber parts of the end arc-shaped liner plate of a conical ball mill proposed in this utility model.

[0013] In the diagram: 1. First frame; 2. Second frame; 3. First rubber part; 4. Second rubber part; 5. Third rubber part; 6. Reinforcing rib; 8. Fixing hole; 10. Countersunk hole. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figures 1 to 4A conical ball mill end arc-shaped liner includes a first frame 1, which is arc-shaped. Second frames 2 extend from both ends of the first frame 1, connecting the first frame 1 and the second frames 2. The first frame 1 has a first rubber portion 3, and the second frame 2 has a second rubber portion 4. A third rubber portion 5 is provided between the first rubber portion 3 and the second rubber portion 4, and the third rubber portion 5 engages with both the first rubber portion 3 and the second rubber portion 4. Fixing holes 8 penetrate both the second frame 2 and the second rubber portion 4. Specifically, the first frame 1 forms an arc angle according to the characteristics of the end arc surface. During this process, the second frames 2, arranged at both ends of the first frame 1, extend the stress-bearing surface of the first frame 1 to both sides of the arc. The first frame 1 and the second frame 2 can be integrally formed from sheet metal or connected by welding. Through this method, the device can adapt to the angle of the end arc surface, and the extension of the stress-bearing surface can distribute the stress on the first frame 1, thereby improving the strength of the frame structure. The first rubber part 3 and the second rubber part 4 are respectively arranged on the first frame 1 and the second frame 2. The first rubber part 3 and the second rubber part 4 are used for contact with grinding balls and materials during the operation of the ball mill. During this process, the first rubber part 3 and the second rubber part 4 will be worn. Since the third rubber part 5 is located between the first rubber part 3 and the second rubber part 4, and the three are connected by an interference fit, the third rubber part 5 is squeezed by the first rubber part 3 and the second rubber part 4. When wear occurs, the compressive force on the third rubber part 5 decreases, and it generates a reverse elastic force that acts on the first rubber part 3 and the second rubber part 4 respectively, and squeezes the first rubber part 3 and the second rubber part 4 to offset the deformation caused by wear and tear. In this way, when the first rubber part 3 and the second rubber part 4 are worn and cracked, the third rubber part 5 can temporarily play an emergency role, reducing the risk of the first rubber part 3 and the second rubber part 4 falling off due to the aggravation of cracks. Furthermore, when the third rubber part 5 experiences wear and cracks, the first rubber part 3 and the second rubber part 4 can also apply compressive force to the third rubber part 5, reducing the risk of gradual separation and deformation of the third rubber part 5 due to cracks. Through the above, it is beneficial to improve the service life of the first rubber part 3, the second rubber part 4, and the third rubber part 5, and reduce the risk of detachment due to cracks.

[0016] Furthermore, the fixing hole 8 is used to fix the device at the end position of the ball mill. It should be noted that the fixing hole 8 only penetrates the second frame 2 and the second rubber part 4. Since the first frame 1 and the first rubber part 3 are arc-shaped, it is not conducive to the fixed connection. In this process, the fixing bolt (not shown in the figure) locks the second frame 2 and the second rubber part 4 at the arc corner of the end of the ball mill. Under the traction of the second frame 2, the first frame 1 drives the first rubber part 3 to be close to the arc corner, so that the device can stably connect the end liner and the cylinder liner, thereby replacing the filler strip used in the prior art, which has a higher service life and easier installation.

[0017] Specifically, both the first rubber part 3 and the second rubber part 4 are engaged with the third rubber part 5 using a wedge-shaped surface. Taking the engagement of the first rubber part 3 and the third rubber part 5 as an example, when either the first rubber part 3 or the third rubber part 5 experiences wear or cracking, the force will move towards their respective end faces. Since both ends of the first rubber part 3 and the third rubber part 5 are wedge-shaped, their contact area increases. Simultaneously, during the mutual compression process, the opposing displacement of the first rubber part 3 and the third rubber part 5 is subjected to vertical pressure from their respective directions. This force, through the wedge-shaped surface, ensures that the first rubber part 3 and the third rubber part 5 remain tightly fitted. This improves the stability of the device during the engagement process between the first rubber part 3 and the second rubber part 4 and the third rubber part 5, thereby reducing the risk of detachment due to cracking.

[0018] Specifically, the cross-section of the third rubber part 5 is trapezoidal. When the cross-section of the third rubber part 5 is trapezoidal, with the long side of the trapezoid forming the base and connecting to the second frame 2, this arrangement ensures that the area of ​​maximum stress on the third rubber part 5 is close to the second frame 2. Since this area is the long side of the trapezoid, the third rubber part 5 has a deformation margin regardless of whether it is subjected to tensile or compressive forces. This reduces the risk of cracking in the third rubber part 5, improves its toughness and strength, and helps to increase its service life.

[0019] Specifically, a reinforcing rib 6 is provided between the first frame 1 and the second frame 2. The reinforcing rib 6 is used to improve the strength between the first frame 1 and the second frame 2. During this process, since the first frame 1 is arc-shaped, and the second frame 2 is used to fix the first frame 1 inside the ball mill, both the second frame 1 and the second frame 2 are subjected to deformation due to the locking force during fixing. Under this condition for a long time, both the first frame 1 and the second frame 2 will experience fatigue, thus affecting their strength and service life. Therefore, the reinforcing rib 6 provides a reverse tensile force in the opposite direction of the locking force, thereby resisting the effect of the locking force on the first frame 1 and the second frame 2. This improves the strength and service life of the first frame 1 and the second frame 2.

[0020] Specifically, the fixing hole 8 is provided with a countersunk hole 10, which is located on the second rubber part 4. During use, the device needs to be fixed inside the ball mill by bolts passing through the fixing hole 8. Before the bolts pass through the fixing hole 8, a nut needs to be pre-embedded in the countersunk hole 10. Through the threaded connection between the nut and the bolt, the nut applies pressure to the countersunk hole 10 and, together with the outer shell of the ball mill, locks the device inside the ball mill.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A conical ball mill end arc-shaped liner, characterized in that: It includes a first frame, which is arc-shaped, with second frames extending from both ends of the first frame. The first frame is connected to the second frame. The first frame is provided with a first rubber part, and the second frame is provided with a second rubber part. A third rubber part is provided between the first rubber part and the second rubber part. The third rubber part is engaged with both the first rubber part and the second rubber part. The second frame and the second rubber part are both provided with fixing holes.

2. The conical ball mill end arc-shaped liner plate according to claim 1, characterized in that: Both the first rubber part and the second rubber part are engaged with the third rubber part by a wedge-shaped surface.

3. The conical ball mill end arc-shaped liner plate according to claim 2, characterized in that: The cross-section of the third rubber section is trapezoidal.

4. The conical ball mill end arc-shaped liner plate according to claim 3, characterized in that: A reinforcing rib is provided between the first frame and the second frame.

5. The conical ball mill end arc-shaped liner plate according to claim 4, characterized in that: The fixing hole has countersunk holes at both ends, and the countersunk holes are located on the second rubber part.

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