Automatic unloading device for ball mill

Abstract

The invention discloses an automatic unloading device for a ball mill, wherein a plurality of unloading ports are arranged on the side wall of the drum; each unloading port comprises a discharge plate and a cover plate arranged in a sealed collecting cover, and the discharge plate and the cover plate are sealed; a hydraulic cylinder drives the cover plate to reciprocate in the direction toward the discharge plate; the inner cavity of the collecting cover of each unloading port is connected to a discharge pipe, and an electric ball valve is arranged at the end of the discharge pipe. Automatic unloading is realized, and the opening and closing of the discharge port can be completed by operating the hydraulic cylinder switch. The unloading is convenient and smooth, and the time is extremely short, which greatly improves the production efficiency and greatly reduces the labor load and labor cost; the material is invisible and leak-free during the unloading, and there is no ground pollution and air dust pollution in the workshop, which keeps the environment clean and tidy, and ensures the health of the workers; and the unloading quality consistency of the ball milled material can be ensured.

Description

Background Art

[0001] In the ball mill, abrasive (steel balls), water and materials to be milled are turned over and collided together in the drum for grinding. In the prior art, after a period of time, when the materials meet the requirements, the ball mill is shut down manually, the bolts connecting the discharge port on the drum of the ball mill are manually removed, the screen is fixed, and then it is rotated downward to let the materials flow out, and a material receiving pipe is set at the bottom to guide the materials to the temporary storage box. From manually removing the bolts to replacing and fixing the screen, the screen needs to be removed after the unloading is completed, the original cover plate needs to be replaced and the bolts tightened. The whole process takes 40 minutes to nearly an hour for skilled workers.

[0002] After a long period of operation, the ball mill has a lot of dust inside. The above-mentioned discharging process is open, the material will be exposed to the external environment, and a large amount of internal dust will be released into the air, polluting the workshop air. At the same time, manual operation during discharging will inevitably cause material leakage and splashing, which will seriously pollute the workshop environment and the ground. A layer of thin mud on the ground has become a normal phenomenon in the ball mill workshop, resulting in a poor working environment for workers.

[0003] Some ball mills use overflow to let the milled material flow out from the center hole. The overflow method is a method of feeding and discharging at the same time. In the overflow method, the material that has just entered the drum may also flow out from the overflow port. The uniformity of the grinding time for all materials cannot be guaranteed, the grinding procedure of the materials cannot be completely consistent, and the consistency of the discharge quality of the milled materials cannot be guaranteed. It is not suitable for fine grinding. Summary of the invention

[0004] In order to solve the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide a ball mill unloading device with leakage-free automatic unloading, which can ensure the consistency of the discharge quality of the ball milled materials. In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is an automatic unloading device for a ball mill, including a horizontal drum of a ball mill, characterized in that a plurality of unloading ports are arranged on the side wall of the drum; each unloading port includes a leaky discharge plate that seals the opening of the side wall of the drum, and also includes a cover plate that corresponds to the sealing cover of the discharge plate, and a sealing member is arranged around the fitting surface of the discharge plate and the cover plate; the discharge plate and the cover plate are arranged in a sealed material collection cover; a hydraulic oil cylinder is installed outside the material collection cover, and the thrust head of the hydraulic oil cylinder penetrates into the material collection cover to drive the cover plate to reciprocate in the direction toward the discharge plate; the inner cavity of the material collection cover of each unloading port is connected to the discharge pipe, and an electric ball valve is arranged at the end of the discharge pipe.

[0005] In order to ensure that the discharge of each discharge port flows smoothly without material accumulation, preferably, the plurality of discharge ports are arranged in a straight line along the axial direction of the drum side wall, and the drum tilting device has one end of the electric ball valve installed at a lower level. Furthermore, the angle between the central axis of the drum and the horizontal line is 1.5 to 3.5 degrees, especially 2.5 degrees.

[0006] Preferably, the slit width of the slit-type discharge plate is 0.8 to 1.2 mm.

[0007] Preferably, the maximum distance between the discharge plate and the cover plate is 14-16 mm, especially 15 mm.

[0008] Preferably, the discharge pipe is a square pipe.

[0009] The beneficial effects of the present invention are that the present invention realizes automatic unloading. Only by operating the hydraulic cylinder switch can the opening and closing of the unloading port be completed. The unloading is convenient and smooth, and the time is extremely short, which greatly improves the production efficiency and greatly reduces the labor load and labor cost. The material is invisible during the unloading and there is no leakage. There is no ground pollution and air dust pollution in the workshop, which keeps the environment clean and tidy and ensures the health of the workers. The unloading quality consistency of the ball-milled material can be ensured.

[0010] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0011] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0012] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The overall structure of the drum is shown in Figure 1. Figure 1 ;

[0014] Figure 2 The overall structure of the drum is shown in Figure 1. Figure 2 ;

[0015] Figure 3 The overall structure of the drum is shown in Figure 1. Figure 3 ;

[0016] Figure 4 Schematic diagram of the internal structure of the discharge port.

[0017] Explanation of the accompanying drawings: 1. Roller; 2. Discharge pipe; 3. Discharge port; 301. Discharge plate; 302. Cover plate; 303. Collection cover; 304. Hydraulic cylinder; 4. Electric ball valve; 5. Rotary joint; 6. Hydraulic oil pipe; 71. First seal; 72. Second seal; 73. Third seal. DETAILED DESCRIPTION

[0018] Referring to the attached drawings, a specific structure of the present invention is shown. The automatic unloading device of the ball mill includes a horizontal drum 1 of the ball mill, and three unloading ports 3 are arranged on the side wall of the drum 1; each unloading port 3 includes a slotted discharge plate 301 fixedly connected to the opening of the side wall of the drum 1, and the connection is sealed by a first sealing member 71. After the ball milling is completed, the material and water can flow out through the slots of the slotted discharge plate 301. The width of the slot is 0.8-1.2 mm, and is set to about 1 mm in this example.

[0019] Each discharge port 3 further includes a cover plate 302, which can correspond to and seal all leaks of the discharge plate 301 to prevent leakage of materials and water during the ball milling process. A second sealing member 72 is provided around the contact surface of the discharge plate 301 and the cover plate 302.

[0020] The discharge plate 301 and the cover plate 302 are installed in the material collecting cover 303. The material collecting cover 303 is fixed to the side wall of the drum 1 and is provided with a third sealing member 73 to ensure that there is no leakage. The hydraulic cylinder 304 is installed outside the material collecting cover 303, and the hydraulic cylinder 304 is connected to an external hydraulic station (not shown in the figure) through a hydraulic pipeline 6 and a rotary joint 5. The thrust head of the hydraulic cylinder 304 penetrates into the material collecting cover 303 to connect and drive the cover plate 302 to reciprocate in the direction toward the discharge plate 301; the inner cavity of the material collecting cover 303 of each discharge port 3 is connected through a square discharge pipe 2, and an electric ball valve 4 is provided at the end of the discharge pipe 2.

[0021] In order to ensure that the discharge flow of each discharge port is smooth and there is no material accumulation, in this example, the three discharge ports 3 are arranged in a straight line along the axial direction of the side wall of the drum 1. Figure 2 The drum 1 tilts the device, and one end of the device electric ball valve 4 is lower. The specific tilt angle is: the angle between the central axis of the drum 1 and the horizontal line is preferably 1.5 to 3.5 degrees. In this example, it is 2.5 degrees.

[0022] When the ball mill is in normal working condition, the cover plate 302 is pushed out by the hydraulic cylinder 304 to fit and seal all the gaps of the discharge plate 301. At the same time, a second sealing member 72 is arranged around the cover plate 302 to ensure no leakage, so as to avoid leakage of materials and water during the ball milling process.

[0023] When discharging after ball milling, the drum 1 stops at the position with the discharge port 3 facing downward, and the thrust head of the hydraulic cylinder 304 is controlled to retract and reset, driving the cover plate 302 and the discharge plate 301 to separate by a certain distance, the maximum distance of which is preferably 14 to 16 mm, specifically 15 mm in this example.

[0024] After the cover plate 302 is separated from the discharge plate 301, the milled material flows out through the gap of the discharge plate 301 due to its own weight, is collected in the collecting cover 303, and then flows out from the opened electric ball valve 4 through the square pipe 2, and the unloading is completed.

[0025] The above implementation is only for the purpose of clearly illustrating the technical solution of the present invention and cannot be understood as limiting the present invention in any way. The present invention has various known substitutions or modifications in the technical field, which fall within the protection scope of the present invention without departing from the essential meaning of the present invention.

Claims

1. An automatic unloading device for a ball mill, comprising a horizontal drum of the ball mill, characterized in that: A plurality of discharge ports are arranged on the side wall of the drum; each discharge port includes a leaky discharge plate that seals the opening of the side wall of the drum, and also includes a cover plate that corresponds to the discharge plate and fits the cover, and sealing members are arranged around the fitting surfaces of the discharge plate and the cover plate; the discharge plate and the cover plate are arranged in a sealed collecting cover; a hydraulic cylinder is installed outside the collecting cover, and the thrust head of the hydraulic cylinder penetrates into the collecting cover to drive the cover plate to reciprocate in the direction toward the discharge plate; the inner cavity of the collecting cover of each discharge port is connected to a discharge pipe, and an electric ball valve is arranged at the end of the discharge pipe; the plurality of discharge ports are arranged in a straight line along the axial direction of the side wall of the drum, and the drum tilting device has one end of the electric ball valve installed at a lower level; the angle between the center axis of the drum and the horizontal line is 1.5 to 3.5 degrees.

2. The automatic unloading device according to claim 1, characterized in that: The angle between the center axis of the drum and the horizontal line is 2.5 degrees.

3. The automatic unloading device according to claim 1 or 2, characterized in that: The gap width of the slit of the slit-type discharge plate is 0.8-1.2 mm; the maximum distance between the discharge plate and the cover plate is 14-16 mm.

4. The automatic unloading device according to claim 3, characterized in that: The maximum distance between the discharge plate and the cover plate is 15 mm.

5. The automatic unloading device according to any one of claims 1, 2 and 4, characterized in that: The discharge pipe is a square pipe.

Images