Ball mill bushing connecting structure and ball mill

Abstract

The utility model provides a ball mill bushing connecting structure and ball mill, wherein the ball mill bushing connecting structure comprises a ball mill end cover and a bushing, the bushing is detachably arranged in the end cover, a wear-resistant coating is arranged in a cylinder body, connected with the bushing, of the ball mill end cover, and the wear-resistant coating is arranged in the cylinder body. A first groove is formed in the outer cylindrical surface of the lining, a first boss matched with the first groove is arranged on the ball mill end cover, a first sealing ring is arranged in the first groove, and the first boss and the first groove are meshed with each other to improve the tightness of connection between the ball mill end cover and the lining. By optimizing the lining connecting structure of the ball mill and arranging the wear-resistant coating inside the barrel body, the wear resistance and the sealing performance are remarkably improved, long-term efficient operation is ensured, the maintenance cost is reduced, and the ball mill is suitable for grinding various ores.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball mill technical field, especially in a kind of ball mill liner connecting structure and ball mill. BACKGROUND

[0002] In the beneficiation production of Guanshan phosphorite of Hebei province, 4 sets of 2736 ball mill are installed and used, model MQG×2.7×3.6 meters wet type lattice type ball mill, processing capacity: 50~75t / h, working speed 21.7r / min, effective volume 17.7m³, each ball mill is installed with a liner at feed end and discharge end, and the cross section of the liner is in the ball mill, when the equipment is running, the liner is worn by steel ball and ore pulp, and the liner at feed end and discharge end of ball mill is replaced once every 4~5 years.The existing ball mill liner and end cover sealing surface area are small, and hard contact sealing is not tight and easy to leak ore;And due to the wear of end cover sealing surface for many years, and the reasons such as liner processing and installation, the liner and the sealing surface of end cover of ball mill cannot be completely contacted and sealed, and when the ball mill is running, the ore pulp enters the hollow shaft of the ball mill through the gap between the liner and the end cover, the end cover hollow shaft is seriously worn in operation, the service life of the end cover of the ball mill is shortened, and the liner and the end cover connection leak ore.

[0003] Patent CN201320852438.3 discloses a ball mill feeding device, which belongs to feeding device, and has the structure of end cover and liner, the liner is arranged in the end cover, the liner is connected with the outer end surface of the end cover through bolts, the contact length of the end cover and the liner is increased, and 3~4 riding seam pins are arranged on the inner end contact surfaces of the end cover and the liner.The device only arranges riding seam pins on the contact surface of the end cover and the liner for positioning, and the tightness of the connection between the end cover and the liner is still poor, and the sealing of the liner and the end cover of the ball mill is still not tight, which causes ore leakage and wear. UTILITY MODEL CONTENTS

[0004] The utility model is in view of above-mentioned problem and carries out, its purpose is at, provide a kind of ball mill liner connecting structure and ball mill.

[0005] Specifically, the first aspect of the utility model provides a ball mill liner connecting structure, which comprises a ball mill end cover and a liner. The liner is detachably arranged in the end cover. A wear-resistant coating is arranged inside the cylinder connected with the liner of the ball mill end cover. A first groove is arranged on the outer cylindrical surface of the liner. A first boss matched with the first groove is arranged on the ball mill end cover. A first sealing ring is arranged in the first groove. The first boss and the first groove are engaged with each other to improve the tightness of the connection between the ball mill end cover and the liner.

[0006] Further, a second groove is arranged on the outer cylindrical surface of the bushing, a second boss adapted to the second groove is arranged on the ball mill end cover, a second sealing ring is arranged in the second groove, and the second boss and the second groove are engaged with each other to further improve the tightness of the connection between the ball mill end cover and the bushing.

[0007] Further, the width of the first groove and the second groove is 10-15 mm, and the depth is 7-10 mm.

[0008] Further, the distance between the first groove and the second groove is 5-20 mm.

[0009] Further, a silicon carbide wear-resistant coating is arranged in the cylinder inside the connection between the ball mill end cover and the bushing.

[0010] Further, the thickness of the wear-resistant coating is 0.5-2 mm.

[0011] Further, a plurality of split pins are arranged on the connecting surface of the ball mill end cover and the bushing.

[0012] Further, the ball mill end cover and the bushing are connected by bolts.

[0013] Further, the ball mill end cover and the bushing are connected by flanges.

[0014] The second aspect of the utility model provides a ball mill containing the ball mill bushing connecting structure.

[0015] The utility model has the following beneficial effects:

[0016] The bushing is detachably arranged in the end cover, facilitating the maintenance and replacement of the bushing, and the wear-resistant coating is arranged in the cylinder inside the connection between the ball mill end cover and the bushing, serving as the first line of defense to reduce the wear of the cylinder inside the connection between the end cover and the bushing, and ensuring that the ball mill bushing does not wear the hollow shaft in the ore pulp; in addition, the first groove is arranged on the outer cylindrical surface of the bushing, the first boss adapted to the first groove is arranged on the ball mill end cover, the first sealing ring is arranged in the first groove, the first boss and the first groove are engaged with each other to improve the tightness of the connection between the ball mill end cover and the bushing, and the sealing reliability is further improved; the elastic sealing of the sealing ring and the contact sealing of the end cover positioning surface are utilized to solve the problem of ore leakage caused by the wear of the ball mill end cover bushing. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0018] Fig. 1 Structure diagram of the ball mill liner connecting structure of the present application;

[0019] Fig. 2 Structure diagram of the connecting end surface of the ball mill end cover and the liner;

[0020] Fig. 3 Structure diagram of the liner.

[0021] Brief description of drawings: 1, ball mill end cover; 2, liner; 3, wear-resistant coating; 4, first groove; 5, first sealing ring; 6, first boss; 7, second groove; 8, second sealing ring; 9, second boss; 10, bolt.

[0022] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be described and explained in the following with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0024] Obviously, the drawings in the following description only represent some examples or embodiments of the present application, and for those skilled in the art, the present application can be applied to other similar situations without any creative effort. In addition, it can be understood that although the effort made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in the present application, some design, manufacture or production changes based on the technical content disclosed in the present application are only routine technical means, and should not be understood as insufficient disclosure of the present application.

[0025] However, there are cases where unnecessary detailed description is omitted. For example, there are cases where detailed description of matters well known, repeated description of actually identical structures is omitted. This is to avoid the following description unnecessarily becoming lengthy, facilitating understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application, and are not intended to limit the subject matter recited in the claims.

[0026] All embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions if not specifically stated.

[0027] All technical features and optional technical features of the present application can be combined with each other to form new technical solutions if not specifically stated.

[0028] Reference Figs. 1 to 3 The first aspect of the embodiments of the utility model provides a ball mill liner connecting structure, including ball mill end cover 1 and liner 2, liner 2 is detachably arranged in end cover, the inside of the cylinder that ball mill end cover 1 is connected with liner 2 is provided with wear-resistant coating 3, first recess 4 is provided on the outer cylindrical surface of liner 2, first boss 6 that is adapted with first recess 4 is equipped on ball mill end cover 1, first sealing ring 5 is arranged in first recess 4, first boss 6 and first recess 4 are engaged with each other for improving the tightness of ball mill end cover 1 and liner 2 connection.

[0029] The wear-resistant coating 3 described above can be coated with commonly used paint on the market, the thickness of the wear-resistant coating 3 is controlled at 0.1-2mm, the width of the wear-resistant coating 3 on the liner 2 is the same as the cross-sectional thickness of the liner 2, and the height of the wear-resistant coating 3 on the end cover is not less than the width of the wear-resistant coating 3 on the liner 2 to ensure the effective coverage and protection of the wear-resistant coating 3. The material selection of the wear-resistant coating 3 needs to consider the temperature, humidity and chemical corrosion of the ball mill working environment and other factors to ensure that the coating is not easy to fall off or wear in long-term use. The application of wear-resistant coating 3 further improves the wear resistance of the liner 2, ensuring that the ball mill can still operate efficiently in harsh environments. In addition, the design of the first recess 4 on the liner 2 and the first boss 6 on the end cover not only enhances the stability of the connection, but also facilitates daily maintenance and replacement, prolonging the service life of the equipment. The first sealing ring 5 is made of high-temperature and corrosion-resistant rubber material, such as nitrile rubber, to ensure that it can still maintain good sealing performance in high-temperature and high-pressure environments, ensuring that the internal medium of the ball mill does not leak, improving the safety and reliability of the equipment.

[0030] The utility model discloses a bushing 2 can be detachably arranged in the end cover, the maintenance and replacement of bushing 2 are convenient, the wear -resistant coating 3 is arranged in the cylinder inside connected with bushing 2 of end cover 1, as the first line of defense reduces the wear and tear of the cylinder inside connected with bushing 2 of end cover, guarantees that ball mill bushing 2 does not enter the hollow shaft of ore pulp wear and tear, in addition still bushing 2's outer cylindrical surface is provided with first recess 4, ball mill end cover 1 is equipped with the first boss 6 of adapting with first recess 4, first sealing ring 5 is arranged in first recess 4, first boss 6 and first recess 4 are engaged for improving the compactness of ball mill end cover 1 and bushing 2 connection, further improved sealed reliability, utilize the elasticity of sealing ring and end cover positioning surface contact seal, solved the ball mill end cover 1 bushing 2 wear and tear ore leakage problem.

[0031] Referring to Fig. 2 In the embodiment of the application, the outer cylindrical surface of the bushing 2 is provided with a second recess 7, the ball mill end cover 1 is provided with a second boss 9 adapted to the second recess 7, and the second recess 7 is provided with a second sealing ring 8. The second boss 9 and the second recess 7 are engaged with each other to further improve the compactness of the connection between the ball mill end cover 1 and the bushing 2. The second sealing ring 8 is made of high-elastic wear-resistant material, such as nitrile rubber, to ensure excellent sealing effect under complex working conditions, effectively prevent ore pulp leakage, improve equipment operation stability, prolong service life, reduce maintenance cost, and ensure production efficiency. The application sets multiple sealing structures on the bushing 2 to enhance the sealing performance layer by layer, effectively isolate the intrusion of ore pulp, protect the internal cleanliness of the equipment, reduce wear and tear, prolong the service life of the components, and improve the overall operation efficiency.

[0032] Referring to Fig. 3 In the embodiment of the application, the width of the first recess 4 and the second recess 7 is 10-15mm, and the depth is 7-10mm. The size of the recess is designed through multiple experiments to ensure that the sealing ring can be effectively accommodated and not deformed under high temperature and high pressure, maintaining stable sealing effect, avoiding equipment failure caused by sealing failure, and further improving the reliability and service life of the ball mill.

[0033] In the embodiment of the application, the spacing between the first recess 4 and the second recess 7 is 5-20mm. This spacing design ensures the independent action of the sealing ring and avoids mutual interference, ensuring that each sealing ring can play the best sealing effect at its respective position, further enhancing the overall sealing performance of the connection between the ball mill end cover 1 and the bushing 2, and improving the stability and durability of the equipment.

[0034] Referring to Fig. 2In the embodiment of the application, the inner barrel of the ball mill end cover 1 and the liner 2 is provided with a silicon carbide wear-resistant coating 3. The silicon carbide coating has high hardness and high temperature resistance, effectively resists the scouring of the ore pulp, reduces the wear of the inner wall of the barrel, and prolongs the service life of the equipment. The coating is uniform in thickness and tightly combined, ensuring that it does not fall off during long-term operation, further improving the overall performance of the ball mill, ensuring continuous production, reducing maintenance frequency, and improving economic benefits.

[0035] In the embodiment of the application, the thickness of the wear-resistant coating 3 is 0.5-2mm. The coating thickness is strictly tested to ensure that it can still maintain excellent wear resistance during long-term use, effectively prolong the service life of the equipment, improve the operation efficiency, reduce the maintenance cost, and ensure the stability of production. The wear-resistant coating 3 can be sprayed by high-temperature spraying process to ensure that the coating is tightly combined with the barrel, enhance the impact resistance, further reduce wear, and improve the reliability of the equipment.

[0036] In the embodiment of the application, the connecting surface of the ball mill end cover 1 and the liner 2 is also provided with a plurality of split pin. The split pin is made of high-strength alloy material, with a diameter of 5-10mm, embedded in the joint gap of the connecting surface, to enhance the connection strength, prevent loosening, ensure the tight combination of the end cover and the liner 2, further improve the overall stability of the equipment, and prolong the service life.

[0037] In the embodiment of the application, the ball mill end cover 1 and the liner 2 are connected by bolts 10. The bolts 10 are made of high-strength stainless steel material to ensure firm and reliable connection. The bolts 10 are evenly distributed, and the number is optimized to effectively disperse the stress, avoid local stress concentration, improve the connection stability, further prolong the service life of the equipment, and ensure efficient and stable production.

[0038] Further, the ball mill end cover 1 and the liner 2 are connected by flanges. The flange connection adopts a precision machining process to ensure that the sealing surface is smooth and flat, cooperates with high-strength bolts 10 to form a tightly reliable connection structure, effectively prevents leakage, further improves the overall sealing performance of the equipment, ensures safe and stable operation, and prolongs the service life.

[0039] The embodiment of the second aspect of the utility model provides a ball mill containing the ball mill liner connecting structure. The ball mill improves the wear resistance and sealing performance by optimizing the connecting structure and the wear-resistant coating 3, ensures long-term efficient operation, reduces maintenance cost, is suitable for various ore grinding, and helps enterprises to improve production efficiency and economic benefits.

[0040] It should be noted that the utility model is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments having the same technical idea and playing the same role within the technical solution range of the utility model are included in the technical solution range of the utility model. In addition, within the range of not departing from the main idea of the utility model, various modifications that can be thought of by those skilled in the art are applied to the embodiments, and other modes constructed by combining part of the constituent elements in the embodiments are also included in the range of the utility model.

Claims

1. A ball mill liner connection structure characterized by, The ball mill end cover (1) and the bushing (2) are connected, the inner of the cylinder of the ball mill end cover (1) and the bushing (2) is provided with wear-resistant coating (3), the outer cylindrical surface of the bushing (2) is provided with the first groove (4), the ball mill end cover (1) is equipped with the first boss (6) which is matched with the first groove (4), the first groove (4) is provided with the first sealing ring (5), the first boss (6) and the first groove (4) are engaged to improve the tightness of the connection between the ball mill end cover (1) and the bushing (2).

2. The ball mill liner connection structure according to claim 1, characterized in that, The outer cylindrical surface of the bushing (2) is provided with the second groove (7), the ball mill end cover (1) is equipped with the second boss (9) which is matched with the second groove (7), the second groove (7) is provided with the second sealing ring (8), the second boss (9) and the second groove (7) are engaged to further improve the tightness of the connection between the ball mill end cover (1) and the bushing (2).

3. The ball mill liner connection structure according to claim 2, characterized in that, The width of the first groove (4) and the second groove (7) is 10-15mm, and the depth is 7-10mm.

4. The ball mill liner connection structure according to claim 2, characterized in that, The distance between the first groove (4) and the second groove (7) is 5-20mm.

5. The ball mill liner connection structure according to claim 1, characterized in that, The inner of the cylinder of the ball mill end cover (1) and the bushing (2) is provided with silicon carbide wear-resistant coating (3).

6. The ball mill liner connection structure according to claim 1, characterized in that, The thickness of the wear-resistant coating (3) is 0.5-2mm.

7. The ball mill liner connection structure according to claim 1, characterized by, The connecting surface of the ball mill end cover (1) and the bushing (2) is also provided with several riding seam pins.

8. The ball mill liner connection structure according to claim 1, characterized in that, The ball mill end cover (1) and the bushing (2) are connected by bolts (10).

9. The ball mill liner connection structure according to claim 1, characterized by, The ball mill end cover (1) and the bushing (2) are connected by flanges.

10. A ball mill characterized in that, The ball mill bushing connection structure of any one of claims 1-9 is included. The ball mill bushing connection structure of any one of claims 1-9 is included.

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