Automatic ball feeding device for ball mill

Abstract

The invention discloses an automatic ball feeding device for a ball mill, which comprises a ball feeding barrel, a rotary gear ball feeding disc, a fixed ball feeding disc, an anti-clamping ball shifting fork and a variable frequency driving device.The automatic disc ball feeding machine provided by the invention is simple and compact in structure, convenient to move, stable and reliable in gear transmission, large in supporting bearing capacity of a plane rotary turntable bearing, and high in ball feeding efficiency; the frequency of the motor is adjustable, balls can be added as required according to the handling capacity of the mill and the ore property, and the number of added balls is visible. The ball adding amount control end can be connected to a mill automation system, and online operation can be directly carried out. The ball clamping prevention shifting fork can better solve the problems of material clogging and ball clamping of a ball feeding barrel. The aperture of the rotary gear ball feeding disc and the aperture of the fixed ball feeding disc can be set according to different mining conditions, the applicability is high, and the popularization value is very high.

Description

Technical Field

[0001] The invention relates to an automatic ball adding device for a ball mill. Background Art

[0002] Semi-autogenous mills and ball mills are widely used grinding equipment in mines. Their main function is to crush and grind ore. During the grinding process of semi-autogenous mills and ball mills, grinding bodies need to be added according to processing requirements. Commonly used grinding bodies are steel balls of different materials and diameters.

[0003] At present, the methods of adding balls to mills in different mines are also different, which can be roughly divided into two methods: manual ball adding and automatic ball adding.

[0004] The Chinese patent "Groove-type automatic ball adding machine for ball mill" (application number: 2016111836533) includes a ball storage bin, a ball passing assembly and a funnel. The ball storage bin includes a bin body and a buffer ball channel, and the buffer ball channel is provided with an outlet; the ball passing assembly includes a ball passing wheel and a driving assembly. The ball passing wheel is arranged at the outlet, and a rotating shaft passes through the middle of the ball passing wheel. A plurality of parallel ball passing channels are provided on the surface of the wheel body. Each ball passing channel is provided with a groove and a protrusion. The groove is arranged at the front end of the protrusion. The front end to the terminal of the upper surface of the protrusion is an arc surface along the circumference of the ball passing channel and finally connected with the surface of the wheel body. The driving assembly is connected to the rotating shaft. The distance between the surface of the ball passing wheel and the edge of the outlet is less than the diameter of the steel ball, and the groove accommodates one steel ball at a time; the funnel includes an inlet end, and the inlet end is located directly below the ball passing wheel. The funnel transmits the steel ball to the ball mill, and utilizes the characteristics of the groove having high ball grasping strength and stable and reliable operation to achieve the purpose of automatic ball adding. The invention is provided with a bin body and a buffer ball lane, which is equivalent to two bins and occupies a large space; the invention sets the buffer ball lane at the front end, and although a ball deflector and a ball blocking plate are set, it still cannot prevent the passing wheel from getting stuck.

[0005] Automatic ball adding means adding balls by various ball adding machines. Although adding balls by ball adding machines can reduce labor intensity, most automatic ball adding machines have problems such as ball jamming, poor ball dribbling, unstable ball adding, uncountable numbers, and easy burning of motors due to heavy load. These problems make it difficult to meet actual production requirements, so many mines still use manual ball adding.

[0006] There are various ways to add balls manually. Most of the ore dressing plants use cranes to lift the steel balls to the ore feeding end of the mill. Workers add balls directly to the hopper with their hands or shovels. Some ore dressing plants even directly cut the steel ball bags at the bottom of the steel ball bags when lifting them to let the steel balls fall into the hopper. The ball adding system is once per shift. The disadvantages of manual ball adding are very obvious. The amount of balls added is inaccurate, the balls are not added at the right time, the labor intensity is high, the balls are not added evenly, the steel ball ratio is uneven, the grinding indicators fluctuate greatly, and there are great safety hazards. The ideal way of adding balls should be able to add balls evenly on demand according to the mill processing capacity and the ball consumption per ton of ore. Summary of the invention

[0007] The object of the present invention is to provide an automatic ball adding device for a ball mill to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic ball adding device for a ball mill, comprising a ball adding barrel, a rotating gear ball adding disc, a fixed ball adding disc, an anti-jamming ball fork and a variable frequency drive device, wherein the ball adding barrel is directly fixed to the rotating gear ball adding disc by flange bolts, and the anti-jamming ball fork is fixed to the central column of the fixed ball adding disc with threads by a key and an upper locking nut, and its direction is consistent with the central line of the ball adding hole of the fixed ball adding disc; the rotating gear ball adding disc is meshed with the transmission gear, and the rotating gear ball adding disc is partially provided with a plurality of equal-diameter ball adding holes along the circumference, and the fixed ball adding disc acts as a chassis, connected to the ball adding machine bracket at the bottom, and connected to the rotating gear ball adding disc at the top through a plane turntable bearing, and relatively rotates; a ball adding hole is provided at the connection between the fixed ball adding disc and the ball adding slideway, and the diameter of the ball adding hole is slightly larger than that of the rotating gear ball adding disc; a counter is provided at the outlet of the ball adding slideway; and the variable frequency drive device is composed of a variable frequency motor and a cycloidal pinwheel reducer.

[0009] Preferably, the transmission gear obtains mechanical energy from the reduction box and meshes with the rotating gear plus ball disc gear, driving the gear plus ball disc to rotate.

[0010] Preferably, the fixed ball-adding disc and the rotating gear ball-adding disc are connected by a plane turntable bearing, and the two turntables are provided with felt sealing grooves.

[0011] Preferably, the variable frequency motor adjusts the frequency through a frequency converter and is connected to the mill automation system computer / touch screen through a PLC.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the automatic disc ball adding machine proposed by the present invention has a simple and compact structure, is easy to move, has a stable and reliable gear transmission, has a large bearing capacity of the plane rotary turntable bearing support, and has an adjustable motor frequency. Balls can be added on demand according to the mill processing capacity and ore properties, and the number of balls added can be visualized. The ball adding quantity control terminal can be connected to the mill automation system and can be directly operated online. The anti-ball jamming fork can better solve the problems of bulging and jamming of the ball adding barrel. The aperture of the rotating gear ball adding disc and the fixed ball adding disc can be set according to different industrial and mining settings, and has strong applicability and high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention.

[0014] In the figure: 1 ball adding barrel, 2 anti-jamming ball fork, 3 rotating gear ball adding disc, 4 fixed ball adding disc, 5 ball adding slideway, 6 counter, 7 plane turntable bearing, 8 bracket, 9 transmission gear, 10 frequency conversion drive device. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1 The present invention provides a technical solution: an automatic ball adding device for a ball mill, comprising a ball adding barrel 1, a rotating gear ball adding disc 3, a fixed ball adding disc 4, an anti-jamming ball fork 2 and a frequency conversion drive device, wherein the ball adding barrel 1 is directly fixed to the rotating gear ball adding disc 4 by flange bolts, and the anti-jamming ball fork 2 is fixed to the central column of the fixed ball adding disc 4 with threads by a key and an upper locking nut, and the direction is consistent with the central line of the ball adding hole of the fixed ball adding disc 4; the rotating gear ball adding disc 3 is meshed with a transmission gear 9, and the rotating gear ball adding disc 3 is partially provided with a plurality of equal-diameter ball adding holes along the circumference, and the fixed ball adding disc 4 acts as a chassis, and is connected to the ball adding machine bracket 8 at the bottom, It is connected to the rotating gear ball adding disc 3 through a plane turntable bearing 7 and rotates relatively; a ball adding hole is provided at the connection between the fixed ball adding disc 4 and the ball adding slide 5 below, and the diameter of the ball adding hole is slightly larger than that of the rotating gear ball adding disc 3; a counter 6 is provided at the exit of the ball adding slide 5; the frequency conversion drive device 10 is composed of a frequency conversion motor and a cycloidal pinwheel reducer, and the transmission gear 9 obtains mechanical energy from the reducer and meshes with the rotating gear ball adding disc 3 to drive the gear ball adding disc to rotate, and the fixed ball adding disc 4 and the rotating gear ball adding disc 3 are connected by a plane turntable bearing 7, and the two turntables are provided with felt sealing grooves, and the frequency conversion motor adjusts the frequency through the frequency converter and is connected to the mill automation system computer / touch screen through the PLC.

[0017] The ball adding barrel 1 is cylindrical and is directly fixed on the rotating gear ball adding disc 3 by flange bolts, which is easy to disassemble and maintain. The anti-jamming ball fork 2 is fixed on the central column of the fixed ball adding disc 4 with threads by means of a key and a locking nut on the top, and its direction is consistent with the center line of the ball adding hole of the fixed ball adding disc. When the ball adding hole of the rotating gear ball adding disc is aligned with the ball adding hole of the fixed ball adding disc, the excess steel balls in the ball adding barrel 1 are automatically pushed away to prevent ball jam and fluff. The steel balls in the rotating ball adding disc 3 fall into the ball adding hole of the fixed ball adding disc 4 under the action of gravity and enter the ball adding slide 5. The rotating gear ball adding disc 3 and the transmission gear 9 mesh with each other to transmit kinetic energy. At the same time, a plurality of equal-diameter ball adding holes are arranged locally along the circumference of the rotating gear ball adding disc 3, so that the rotating disc can carry the ball better. The fixed ball adding disc 4 acts as a chassis, and is supported by the ball adding machine bracket 8 at the bottom, and is connected to the rotating gear ball adding disc 3 through the plane turntable bearing 7 at the top, and rotates relatively; the fixed ball adding disc 4 is only provided with a ball adding hole above the ball adding slideway, and the diameter of the ball adding hole is slightly larger than the rotating gear ball adding disc, so that the steel balls can fall in automatically. The ball adding slideway 5 is provided with a certain inclination angle, and is lined with wear-resistant materials, so that the steel balls can pass directly into the mill hopper. Counter 6, when the steel balls pass through counter 6, the counter automatically accumulates, and is connected to the mill automation system computer through PLC, so that the amount of steel balls added can be visualized. The frequency conversion drive device 10 is composed of a frequency conversion motor and a cycloidal pinwheel reducer. The user can adjust the motor frequency through the frequency conversion cabinet to control the amount of steel balls added, and is connected to the mill automation system computer / touch screen controller through PLC, and is directly controlled by the mill worker.

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic ball adding device for a ball mill, characterized by: It includes a ball adding barrel, a rotating gear ball adding disc, a fixed ball adding disc, an anti-jamming ball fork and a frequency conversion drive device. The ball adding barrel is directly fixed to the rotating gear ball adding disc by flange bolts. The anti-jamming ball fork is fixed to the central column of the fixed ball adding disc with threads by a key and an upper locking nut, and its direction is consistent with the central line of the ball adding hole of the fixed ball adding disc; the rotating gear ball adding disc is meshed with the transmission gear, and a plurality of equal-diameter ball adding holes are arranged locally along the circumference of the rotating gear ball adding disc; the fixed ball adding disc acts as a chassis, which is connected to the ball adding machine bracket at the bottom and connected to the rotating gear ball adding disc at the top by a plane turntable bearing, and they rotate relatively; a ball adding hole is arranged at the connection between the fixed ball adding disc and the ball adding slideway, and the diameter of the ball adding hole is slightly larger than that of the rotating gear ball adding disc; a counter is arranged at the outlet of the ball adding slideway; the frequency conversion drive device is composed of a frequency conversion motor and a cycloidal pinwheel reducer.

2. The automatic ball adding device for a ball mill according to claim 1, characterized in that: The transmission gear obtains mechanical energy from the reduction box and meshes with the rotating gear plus ball disc gear, driving the gear plus ball disc to rotate.

3. The automatic ball adding device for a ball mill according to claim 1, characterized in that: The fixed ball-adding disc and the rotating gear ball-adding disc are connected by a plane turntable bearing, and the two turntables are provided with felt sealing grooves.

4. The automatic ball adding device for a ball mill according to claim 1, characterized in that: The variable frequency motor adjusts the frequency through the frequency converter and is connected to the computer / touch screen of the mill automation system through the PLC.

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