A rod mill wear-resistant lining plate mounting structure

Abstract

This utility model discloses an installation structure for a wear-resistant liner in a rod mill, relating to the field of wear-resistant liner technology. The rod mill cylinder has a threaded through-hole on its arc-shaped sidewall. The inner surface of the wear-resistant liner has an installation groove, and the bottom surface of the installation groove has a mounting screw hole adapted to the threaded through-hole. The bolt assembly includes a bolt whose threads sequentially penetrate the corresponding threaded through-hole and mounting screw hole, a nut disposed in the installation groove and connected to the threaded section of the bolt, the outer circumferential shape of the nut being adapted to the inner sidewall of the installation groove and circumferentially limited by the inner sidewall of the installation groove, a limiting slot on the end face of the threaded section of the bolt, and a limiting element in the installation groove that inserts into the limiting slot and circumferentially limits the bolt. This utility model effectively overcomes the problem of bolts easily loosening and requiring frequent inspections during the installation and use of traditional wear-resistant liners. It not only provides a strong guarantee for the firm and stable installation of the wear-resistant liner but also effectively extends the maintenance frequency of the rod mill.

Description

Technical Field

[0001] This utility model relates to the field of wear-resistant liner technology, and in particular to an installation structure for a wear-resistant liner of a rod mill. Background Technology

[0002] As a core grinding equipment in industries such as mining and metallurgy, rod mills need to withstand the intense impact and friction between steel rods and materials over long periods. To extend their service life, wear-resistant liners need to be installed on the inner wall of the cylinder. Currently, these liners are fixed with bolts, but this installation method has the following shortcomings in practical use:

[0003] 1. The high-frequency vibration during the operation of the rod mill can easily cause the nuts and bolts to rotate relative to each other. In order to ensure the installation of the wear-resistant liner, the staff needs to frequently stop the rod mill for inspection (on average once every 1-2 months). The maintenance cost is high. During the inspection, each bolt also needs to be tightened one by one, which is time-consuming and labor-intensive.

[0004] 2. Currently, in order to prevent the bolts and nuts from loosening during the bolt installation process, double nuts, spring washers, etc. are often used to prevent loosening. However, this method will still fail under continuous vibration and the effect is not ideal.

[0005] 3. Since the bolt head is a planar structure, while the outer wall of the rod mill cylinder is mostly curved, the bolt head cannot be completely fitted with the curved surface of the outer wall of the cylinder. This results in the bolt head forming line contact or point contact with the outer wall of the cylinder. This not only makes it easy for the cylinder to be crushed and deformed locally due to local stress concentration, but also greatly increases the probability of bolt loosening and breakage under vibration conditions due to uneven stress on the bolt.

[0006] Therefore, there is an urgent need for a rod mill wear-resistant liner installation structure that combines anti-loosening reliability, convenient installation, and wide applicability. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, this utility model discloses a rod mill wear-resistant liner installation structure. This utility model effectively overcomes the problem that bolts are easy to loosen and frequent inspections are required when installing and using traditional wear-resistant liners. It not only provides a strong guarantee for the firm and stable installation of wear-resistant liners, but also effectively extends the maintenance frequency of rod mills.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A rod mill wear-resistant liner mounting structure includes a rod mill cylinder, a wear-resistant liner, and a bolt assembly for mounting the wear-resistant liner. The arc-shaped sidewall of the rod mill cylinder is provided with a threaded through hole, and the inner surface of the wear-resistant liner is provided with a mounting groove. The bottom surface of the mounting groove is provided with a mounting screw hole that matches the threaded through hole.

[0010] The bolt assembly includes:

[0011] The bolt has a threaded section that passes through the corresponding threaded through hole and mounting screw hole in sequence, and has a limit slot on the end face;

[0012] The nut is placed in the mounting groove and connected to the threaded section of the bolt. The outer circumferential shape of the nut is adapted to the inner sidewall of the mounting groove. The inner sidewall of the mounting groove limits the nut in the circumferential direction and prevents the nut from rotating horizontally.

[0013] The limiting component is detachably installed in the mounting groove and plugged into the limiting slot. The mounting groove limits the circumferential movement of the limiting component and prevents the bolt from rotating.

[0014] Furthermore, the limiting element includes:

[0015] A baffle is installed at the opening of the mounting slot to protect the bolts and nuts.

[0016] A limit rod is set on the inner surface of the baffle and is adapted to be inserted into the limit slot;

[0017] A concealed handle is located on the outer surface of the baffle and is used to assemble and disassemble the baffle and the limit rod.

[0018] Furthermore, the outer surface of the baffle and the inner surface of the wear-resistant liner are on the same plane.

[0019] Furthermore, the groove opening of the mounting slot is provided with an enlarged diameter port, and a baffle can be detachably installed inside the enlarged diameter port to prevent it from rotating horizontally.

[0020] Furthermore, the cross-sections of the limiting slot, limiting rod, nut, mounting groove, baffle, and enlarged diameter port are all regular polygonal structures.

[0021] Furthermore, the nut 3 and the mounting groove, as well as the baffle and the enlarged diameter port, are all interference fit, with an interference amount of 0.02-0.05mm.

[0022] Furthermore, a hinge that is hinged to the baffle is provided on one side of the inner wall of the expansion port, and an arc-shaped groove is provided on the inner wall of the limiting slot away from the hinge. The limiting rod slides into the limiting slot along the arc-shaped groove as the baffle rotates.

[0023] Furthermore, a slot is provided on the other side of the inner wall of the enlarged opening, and a protruding ridge that matches the slot is provided on the side of the baffle away from the hinge. The protruding ridge opens / closes with the rotation of the baffle to achieve engagement / disengagement with the slot.

[0024] Furthermore, the bolt assembly also includes:

[0025] A support component is installed between the bolt head and the arc-shaped side wall of the rod mill cylinder to provide horizontal support for the bolt head.

[0026] Furthermore, the upper end face of the support is parallel to the head of the bolt, the lower end face of the support is attached to the arc-shaped side wall of the rod mill cylinder, and the upper end face of the support is provided with a through hole that penetrates the support and is clearance-fitted with the threaded rod of the bolt.

[0027] Compared with the prior art, the beneficial effects of this utility model are: by limiting the circumferential position of the nut through the mounting groove, the rotation of the nut can be effectively prevented, and the loosening of the nut can be effectively prevented during the rotation and vibration of the rod mill, thus realizing the first-level locking and limiting of the wear-resistant liner.

[0028] By inserting the limiting component into the limiting slot on the bolt end face, and by using the mounting groove to circumferentially limit the limiting component, the rotation of the bolt can be effectively prevented during the rotation and vibration of the rod mill, thus achieving a two-stage locking limit for the wear-resistant liner.

[0029] By setting baffles, not only can nuts and bolts be protected and prevented from wearing out, but the inner surface of the wear-resistant liner is also kept flat, ensuring the crushing effect on materials.

[0030] By setting an enlarged diameter opening, the baffle can be effectively locked and supported, greatly improving the structural strength of the baffle and providing strong support for the subsequent crushing and grinding of materials.

[0031] By setting hinges and ridges, not only can the baffle be securely and stably fastened and installed by the rod mill operator, but it also greatly facilitates the subsequent opening and closing operation of the baffle.

[0032] By setting up support components, the gap between the bolt head and the arc-shaped side wall of the rod mill cylinder is filled, which makes the bolt preload evenly distributed. This not only effectively prevents the bolt from loosening under vibration conditions, but also prevents slurry dust from penetrating and corroding the bolt.

[0033] This ensures the vertical stability of the bolts and prevents bolt deformation, providing strong support for efficient disassembly and assembly later.

[0034] This invention effectively overcomes the problem of bolts easily loosening and requiring frequent inspections during the installation and use of traditional wear-resistant liners by using double mechanical locking of bolts and nuts. It not only provides a strong guarantee for the firm and stable installation of wear-resistant liners, but also effectively extends the maintenance frequency of the rod mill, reduces the workload of maintenance personnel, and greatly improves the production and processing efficiency of the rod mill. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of this utility model;

[0036] Figure 2This is a schematic diagram of the bolt assembly structure of this utility model;

[0037] Figure 3 This is a schematic diagram of the baffle installation structure of this utility model.

[0038] In the diagram: 1. Rod mill cylinder; 1.1 Threaded through hole; 2. Wear-resistant liner; 2.1 Mounting groove; 2.2 Mounting screw hole; 2.3 Expanded diameter port; 2.3.1 Slot; 2.3.2 Hinge; 3. Bolt assembly; 3.1 Bolt; 3.1.1 Limiting slot; 3.1.1.1 Arc-shaped slide groove; 3.2 Support component; 3.2.1 Through hole; 3.3 Nut; 3.4 Limiting component; 3.4.1 Limiting rod; 3.4.2 Baffle; 3.4.3 Concealed handle; 3.4.4 Raised ridge. Detailed Implementation

[0039] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0040] Please refer to the instruction manual appendix. Figure 1-3 This utility model provides a technical solution:

[0041] Example 1: A rod mill wear-resistant liner mounting structure includes a rod mill cylinder 1, a wear-resistant liner 2, and a bolt assembly 3 for mounting the wear-resistant liner 2. The arc-shaped side wall of the rod mill cylinder 1 is provided with a threaded through hole 1.1, and the inner surface of the wear-resistant liner 2 is provided with a mounting groove 2.1. The bottom surface of the mounting groove 2.1 is provided with a mounting screw hole 2.2 that matches the threaded through hole 1.1.

[0042] Specifically, the bolt assembly 3 includes a bolt 3.1, a nut 3.3, and a limiting member 3.4. The threaded section of the bolt 3.1 sequentially passes through the corresponding threaded through hole 1.1 and mounting screw hole 2.2 to connect the wear-resistant liner 2 and the rod mill cylinder 1. The end face of the threaded section of the bolt 3.1 is provided with a limiting slot 3.1.1. The outer circumferential shape of the nut 3.3 is adapted to the inner sidewall of the mounting groove 2.1. The threaded section of the bolt 3.1, which passes through the mounting screw hole 2.2, is threadedly connected to the nut 3.3. The inner sidewall of the mounting groove 2.1 limits the circumferential movement of the nut 3.3, preventing the nut 3.3 from rotating horizontally, thus achieving the first-level locking of the bolt assembly 3.

[0043] The limiting component 3.4 includes a baffle 3.4.2 and a limiting rod 3.4.1. The groove of the mounting slot 2.1 is provided with an enlarged diameter port 2.3. The baffle 3.4.2 is adapted to the enlarged diameter port 2.3 and is interference-fitted into the enlarged diameter port 2.3. The setting of the enlarged diameter port 2.3 can effectively lock and support the baffle 3.4.2, greatly improving the structural strength of the baffle 3.4.2. The inner surface of the baffle 3.4.2 is provided with a limiting rod 3.4.1 that is inserted into the limiting slot 3.1.1. The enlarged diameter port 2.3 circumferentially limits the baffle 3.4.2, preventing the horizontal rotation of the baffle 3.4.2 and the limiting rod 3.4.1. Furthermore, the insertion of the limiting rod 3.4.1 into the limiting slot 3.1.1 also achieves circumferential limiting of the bolt 3.1, preventing the rotation of the bolt 3.1, thus realizing the secondary locking of the bolt assembly 3.

[0044] To ensure effective circumferential limiting of the mounting slot 2.1 to the nut 3.3, the expanded diameter port 2.3 to the baffle 3.4.2, and the limiting rod 3.4.1 to the bolt 3.1, the cross-sections of the limiting slot 3.1.1, the limiting rod 3.4.1, the nut 3.3, the mounting slot 2.1, the baffle 3.4.2, and the expanded diameter port 2.3 are all regular polygonal structures. The nut 3.3 and the mounting slot 2.1, as well as the baffle 3.4.2 and the expanded diameter port 2.3, are all interference fit with an interference amount of 0.02-0.05mm. To facilitate the disassembly of the limiting component 3.4, a concealed handle 3.4.3 is provided on the outer surface of the baffle 3.4.2.

[0045] Furthermore, in order to ensure that the inner surface of the wear-resistant liner 2 remains flat and to provide strong support for the subsequent crushing and grinding of materials, the outer surface of the baffle 3.4.2 is on the same plane as the inner surface of the wear-resistant liner 2.

[0046] In Example 2, to ensure a secure and stable interference fit between the baffle 3.4.2 and the enlarged diameter port 2.3, thereby ensuring a stable and effective secondary locking of the bolt 3.1 by the limiting component 3.4, a hinge 2.3.2 is provided on one side of the inner wall of the enlarged diameter port 2.3, which is hinged to the baffle 3.4.2. To ensure that the limiting rod 3.4.1 can smoothly engage or disengage from the limiting slot 3.1.1 during the rotational opening and closing of the baffle 3.4.2, and also effectively limit the circumferential movement of the bolt 3.1, the limiting slot 3.1.1 is located away from the hinge 2.3.2. The inner side wall is provided with an arc-shaped sliding groove 3.1.1.1. As the baffle 3.4.2 rotates, the limiting rod 3.4.1 slides along the arc-shaped sliding groove 3.1.1.1 and is inserted into the limiting slot 3.1.1. In order to further improve the stability of the installation of the baffle 3.4.2, a slot 2.3.1 is provided on the other side of the inner wall of the enlarged diameter port 2.3. The side of the baffle 3.4.2 away from the hinge 2.3.2 is provided with a protruding rib 3.4.4 that matches the slot 2.3.1. The protruding rib 3.4.4 opens / closes with the baffle 3.4.2 to achieve engagement / disengagement with the slot 2.3.1.

[0047] In Example 3, during the installation of the bolt assembly 3 onto the wear-resistant liner 2, the head of the bolt 3.1 is located outside the rod mill cylinder 1. However, the rod mill cylinder 1 is a columnar structure, and the head of the bolt 3.1 cannot be tightly fitted with the arc-shaped sidewall of the rod mill cylinder 1. The head of the bolt 3.1 only contacts the rod mill cylinder 1 at its edge or center point, forming line contact or point contact. This not only easily leads to the stress in the contact area of ​​the bolt 3.1 head possibly exceeding the material yield strength, causing the outer wall of the rod mill cylinder 1 to crush and deform, but also makes the bolt 3.1 prone to loosening under vibration conditions, increasing the risk of failure of the wear-resistant liner 2 by more than 50%. In addition, the bolt 3.1, which should be subjected to axial pressure, is subjected to uneven force, increasing the probability that the bolt 3.1 is prone to breakage under bending stress.

[0048] To ensure that the head of bolt 3.1 fits tightly against the outer wall of the rod mill cylinder 1, the bolt assembly 3 also includes a support member 3.2. The upper end face of the support member 3.2 is parallel to the head of bolt 3.1, and the lower end face of the support member 3.2 is attached to the arc-shaped side wall of the rod mill cylinder 1. The upper end face of the support member 3.2 has a through hole 3.2.1 that penetrates the support member 3.2 and is clearance-fitted with the threaded rod of bolt 3.1. The support member 3.2 is positioned between the head of bolt 3.1 and the arc-shaped side wall of the rod mill cylinder 1 through the through hole 3.2.1 to provide horizontal support for the head of bolt 3.1.

[0049] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A rod mill wear-resistant liner mounting structure, comprising a rod mill cylinder (1), a wear-resistant liner (2), and a bolt assembly (3) for mounting the wear-resistant liner (2), wherein the arc-shaped sidewall of the rod mill cylinder (1) is provided with a threaded through hole (1.1), the inner surface of the wear-resistant liner (2) is provided with a mounting groove (2.1), and the bottom surface of the mounting groove (2.1) is provided with a mounting screw hole (2.2) adapted to the threaded through hole (1.1), characterized in that, Bolt assembly (3) includes: Bolt (3.1), the threaded section of bolt (3.1) sequentially passes through the corresponding threaded through hole (1.1) and mounting screw hole (2.2), and is provided with a limit slot (3.1.1) on the end face; Nut (3.3) is set in the mounting groove (2.1) and connected to the threaded section of bolt (3.1). The outer circumferential shape of nut (3.3) is adapted to the inner wall of mounting groove (2.1). The inner wall of mounting groove (2.1) limits the circumferential movement of nut (3.3) and prevents nut (3.3) from rotating horizontally. The limiting component (3.4) is detachably installed in the mounting groove (2.1) and plugged into the limiting slot (3.1.1). The mounting groove (2.1) limits the circumferential movement of the limiting component (3.4) and prevents the bolt (3.1) from rotating.

2. The rod mill wear-resistant liner mounting structure according to claim 1, characterized in that: The limiting component (3.4) includes: A baffle (3.4.2) is provided at the opening of the mounting groove (2.1) to protect the bolt (3.1) and nut (3.3); The limiting rod (3.4.1) is located on the inner surface of the baffle (3.4.2) and is adapted to be inserted into the limiting slot (3.1.1); A concealed handle (3.4.3) is provided on the outer surface of the baffle (3.4.2) for disassembling and assembling the baffle (3.4.2) and the limiting rod (3.4.1).

3. The rod mill wear-resistant liner installation structure according to claim 2, characterized in that: The outer surface of the baffle (3.4.2) and the inner surface of the wear-resistant liner (2) are on the same plane.

4. The rod mill wear-resistant liner installation structure according to claim 3, characterized in that: The mounting slot (2.1) has an enlarged diameter port (2.3) at the opening. The baffle (3.4.2) can be detachably installed in the enlarged diameter port (2.3) and prevents it from rotating horizontally.

5. The rod mill wear-resistant liner mounting structure according to claim 4, characterized in that: The cross-sections of the limiting slot (3.1.1), limiting rod (3.4.1), nut (3.3), mounting groove (2.1), baffle (3.4.2) and enlarged diameter port (2.3) are all regular polygonal structures.

6. The rod mill wear-resistant liner mounting structure according to claim 5, characterized in that: The nut (3.3) and the mounting groove (2.1), as well as the baffle (3.4.2) and the enlarged diameter port (2.3) are all interference fit, with an interference of 0.02-0.05mm.

7. The rod mill wear-resistant liner mounting structure according to claim 5, characterized in that: A hinge (2.3.2) is provided on one side of the inner wall of the enlarged opening (2.3) and is hinged to the baffle (3.4.2). An arc-shaped groove is provided on the inner wall of the limiting slot (3.1.1) on the side away from the hinge (2.3.2). 3.1.1.1), the limiting rod (3.4.1) moves along the arc-shaped groove as the baffle (3.4.2) rotates. 3.1.1.1) Slide the insertion into the limiting slot (3.1.1).

8. The rod mill wear-resistant liner mounting structure according to claim 7, characterized in that: A slot (2.3.1) is provided on the other side of the inner wall of the enlarged opening (2.3). A protrusion (3.4.4) that matches the slot (2.3.1) is provided on the side of the baffle (3.4.2) away from the hinge (2.3.2). The protrusion (3.4.4) opens / closes with the baffle (3.4.2) to engage / disengage with the slot (2.3.1).

9. The rod mill wear-resistant liner mounting structure according to claim 1, characterized in that: The bolt assembly (3) also includes: The support member (3.2) is located between the head of the bolt (3.1) and the arc-shaped side wall of the rod mill cylinder (1) to provide horizontal support for the head of the bolt (3.1).

10. The rod mill wear-resistant liner mounting structure according to claim 9, characterized in that: The upper end face of the support member (3.2) is parallel to the head of the bolt (3.1), and the lower end face of the support member (3.2) is attached to the arc side wall of the rod mill cylinder (1). The upper end face of the support member (3.2) is provided with a through hole (3.2.1) that penetrates the support member (3.2) and is in clearance fit with the threaded rod of the bolt (3.1).

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