A ball loosening method for a ball adding machine

Abstract

The present invention provides a ball loosening device and a ball loosening method for a ball adding machine, comprising a ball storage bin of the ball adding machine, a first baffle plate is arranged at the ball outlet of the ball storage bin, a bottom plate is arranged at the bottom of the ball storage bin, an end of the bottom plate away from the ball outlet is movably connected to the ball storage bin, and a driving mechanism for driving the bottom plate to move is arranged below the bottom plate. This scheme can effectively break the static balance of the steel ball pile in the ball storage bin, and the operation is more stable, reliable and efficient, and many hazards and disadvantages caused by vibration are completely eliminated, and the difficult problems of ball blocking and ball jamming that are difficult to prevent and solve in the process of adding balls are solved, so as to achieve stable and accurate replenishment of steel balls.

Description

Technical Field

[0001] The invention belongs to the technical field of mining and metallurgical equipment control, in particular to a ball adding machine for adding balls to a ball mill, a ball loosening device and a ball loosening method when balls are blocked in a ball storage bin. Background Art

[0002] In the process of mining and metallurgical production, ball mill grinding is an extremely important process link. In order to achieve the best grinding effect of ball mill, a ball adding machine is often set up simultaneously. The ball adding machine can accurately add grinding media according to the ore quality, ore quantity, timing, quantity, and can maintain the best ball-to-charge ratio of the ball mill, so that the ball mill can achieve the best operating effect. It is the best auxiliary equipment for stabilizing production, saving energy, reducing consumption, improving efficiency, and reflecting grinding automation. At the same time, due to the realization of intelligent automatic ball adding, it replaces manual ball adding, saves manpower, and greatly reduces the labor intensity of workers.

[0003] However, in the normal actual production and operation process of the intelligent ball adding machine, the "ball jamming" phenomenon at the ball bin outlet baffle is more prominent, which restricts the ball catching effect and greatly restricts the practical performance of the ball adding machine, which is mainly manifested in the untimely ball supply in the ball bin and low ball catching efficiency. Faced with this situation, there is currently little attention paid to the methods and means of loosening balls. In order to ensure that the balls in the ball bin can be replenished in time when there is space at the ball catching port, it is necessary to loosen the ball pile with the help of external force. The ball loosening method currently used is mostly vibration motors. In this way, continuous vibration is required during the ball loosening process. This vibration shock not only has an adverse effect on the ball adding machine equipment itself, but also endangers the safety of surrounding structures. It is also a noise hazard.

[0004] The purpose of the present invention is to provide a ball loosening device and a ball loosening method for a ball adding machine in view of the deficiencies in the prior art. The scheme can effectively break the static balance of the steel ball pile in the ball storage bin, and the operation is more stable, reliable and efficient, and many hazards and disadvantages caused by vibration are completely eliminated. The difficult problems of ball blockage and ball jamming that are difficult to prevent and solve in the ball adding process are solved, and the stable and accurate replenishment of steel balls is achieved.

[0005] This solution is achieved through the following technical measures: a ball loosening device for a ball adding machine, including a ball storage bin of the ball adding machine, a first baffle is arranged at the ball outlet of the ball storage bin, a bottom plate is arranged at the bottom of the ball storage bin, an end of the bottom plate away from the ball outlet is movably connected to the ball storage bin, and a driving mechanism for driving the bottom plate to move is arranged below the bottom plate. The bottom plate is movably connected to the ball storage bin, so that the bottom plate can rotate up and down under the drive of the driving mechanism, breaking the static balance of the steel ball pile in the ball storage bin, changing the position arrangement of all the steel balls in the bin, and achieving a ball loosening effect.

[0006] The bottom plate is hinged to the ball storage bin, and the bottom plate can rotate around the hinge. A hydraulic source is arranged below the bottom plate, and the hydraulic source is connected to the electro-hydraulic push rod. The driving mechanism is an electro-hydraulic push rod. The hinge connection makes it easy to install and move the bottom plate. The electro-hydraulic push rod is connected to the hydraulic pipe, which makes it easy to control. By controlling the hydraulic source, the electro-hydraulic push rod can be pushed to rotate the bottom plate up and down.

[0007] A bracket for supporting the bottom plate is arranged under the bottom plate, and a plurality of reinforcing ribs are arranged under the bottom plate. The bracket can support the bottom plate when the electro-hydraulic push rod is not working, so as to avoid fatigue caused by the electro-hydraulic push rod working all the time; the reinforcing ribs can improve the integrity of the bottom plate and avoid breakage of the bottom plate.

[0008] A second baffle is arranged on the inner wall of the ball storage bin above the ball outlet, and the second baffle is tilted downward. This can provide a certain support to the steel balls in the ball storage bin, change the force between the steel balls, and prevent the gravity of the steel balls from pressing all the way to the ball outlet, which is more conducive to ball outlet. During operation, the steel balls pass through the opening between the second steel plate and the bottom plate one by one, and finally reach the ball scooping mechanism through the ball outlet.

[0009] A ball loosening method for a ball adding machine based on the above device is characterized by comprising the following steps:

[0010] 1) During the ball catching process, if there is no ball, the driving mechanism is started to push the bottom plate to move;

[0011] 2) The ball catching mechanism continues to catch the ball. If there is still no ball, the driving mechanism is repeatedly started to push the bottom plate up and down.

[0012] In step 1), if the ball scooping mechanism cannot obtain the steel ball, and the number of consecutive failures X exceeds the set maximum value Xmax, that is, X=Xmax+1, the driving mechanism is started to push the bottom plate; otherwise, if X≤Xmax, the driving mechanism is not started to push the bottom plate.

[0013] In step 1), the driving mechanism is an electro-hydraulic push rod. When the lifting height of the electro-hydraulic push rod reaches the set maximum value Mmax, the hydraulic source connected to the electro-hydraulic push rod stops working, and the base plate lifted by the electro-hydraulic push rod also rises to the maximum height synchronously; on the contrary, if the electric-hydraulic push rod does not rise to the maximum value Mmax, the hydraulic source continues to work, and the electric-hydraulic push rod continues to push up the base plate. For the maximum height of the electric-hydraulic push rod, the maximum stroke can be set according to actual needs.

[0014] After the hydraulic source stops working, the electro-hydraulic push rod and the movable bottom plate fall back to their original positions. If a steel ball rolls through the ball outlet and is caught by the ball catching mechanism, the entire ball loosening work is completed and the electro-hydraulic push rod is in its original position. On the contrary, if no steel ball rolls out from the ball outlet, or a steel ball rolls out but is not caught by the ball catching mechanism, the hydraulic source is started repeatedly until the ball catching mechanism catches the steel ball.

[0015] When the hydraulic source continuous start times Z is not greater than the set allowable continuous start times Zmax, the hydraulic source is started repeatedly, and once the start times Z is greater than the set allowable continuous start times Zmax, that is, Z=Zmax+1, the ball loosening operation fails and an alarm is issued, reminding the staff that the steel balls in the ball storage bin are consumed due to insufficient stock or the ball loosening mechanism fails.

[0016] The beneficial effects of this scheme can be learned from the description of the above scheme. When the hydraulic source of the electro-hydraulic device is started, the hydraulic oil enters the electro-hydraulic push rod through the oil pipe. When the push rod rises to the set highest point of the stroke, the bottom plate is lifted to the highest point. At this time, the hydraulic source stops working, the hydraulic oil begins to flow back naturally, and due to the effect of gravity and the bottom plate, the push rod automatically falls back, and the movable bottom plate returns to its position. Because of the flexible characteristics of hydraulic control, the entire action process is smooth and without violent impact, avoiding various mechanical vibrations and collisions, and will not have any adverse effects on the ball adding machine equipment body and surrounding structures. The static stability of the steel ball pile is broken, and the steel balls will inevitably roll, so the ball loosening efficiency is significantly improved; this method has high stability, high reliability and ease of use of loose balls; the scope of application is wider, and the diameter of the loose steel balls currently in use has reached Φ150mm, which is suitable for the steel ball addition operation site of various mining and metallurgical enterprises. It can be seen that compared with the prior art, the present invention has outstanding substantial characteristics and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0018] Figure 2 It is a flow chart of a specific implementation mode of the present invention.

[0019] In the figure, 1 is a bottom plate, 2 is a hinge, 3 is a ball storage bin, 4 is a second ball baffle plate, 5 is a first ball baffle plate, 6 is an electro-hydraulic push rod, 7 is a hydraulic source, and 8 is a bracket. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of the present solution, the present solution is described below through a specific implementation method and in conjunction with its accompanying drawings.

[0021] As can be seen from the accompanying drawings, the ball loosening device of the ball adding machine of the present scheme includes a ball storage bin 3, a first baffle 5 is arranged at the ball outlet of the ball storage bin 3, a bottom plate 1 is arranged at the bottom of the ball storage bin 3, an end of the bottom plate 1 away from the ball outlet is movably connected to the ball storage bin 3, and a driving mechanism for driving the bottom plate to move is arranged below the bottom plate 1, and the driving mechanism is an electro-hydraulic push rod 6. A second baffle 4 is arranged on the inner wall of the ball storage bin 3 above the ball outlet, and the second baffle 4 is fixed obliquely downward on the inner wall of the ball storage bin.

[0022] The bottom plate 1 is hinged with the ball storage bin 3, and the bottom plate 1 can rotate around the hinge 2. A hydraulic source 7 is arranged below the bottom plate 1, and the hydraulic source 7 is connected with the electro-hydraulic push rod 6. A bracket 8 for supporting the bottom plate 1 is arranged below the bottom plate 1, and a plurality of reinforcing ribs are arranged below the bottom plate 1.

[0023] The ball loosening method of the ball adding machine based on the above device is characterized by comprising the following steps:

[0024] 1) During the ball catching process, if there is no ball, the driving mechanism is started to push the bottom plate to move;

[0025] 2) The ball catching mechanism continues to catch the ball. If there is still no ball, the driving mechanism is repeatedly started to push the bottom plate up and down.

[0026] In step 1), if the ball scooping mechanism cannot obtain steel balls, and the number of times X that it cannot obtain steel balls continuously exceeds the set maximum value Xmax, that is, when X=Xmax+1, the driving mechanism is started to push the bottom plate; otherwise, if X≤Xmax, the driving mechanism is not started to push the bottom plate. Xmax can be set according to actual use. In this embodiment, Xmax is 5 times or 10 times. If it is set too little, the driving mechanism will be started frequently, reducing the working efficiency. If it is too much, less steel balls will be produced, which will affect the subsequent grinding work. Five times or ten times will not have much impact on the subsequent grinding work.

[0027] In step 1), the driving mechanism is an electro-hydraulic device, that is, an electro-hydraulic push rod with a hydraulic source. When the height of the electro-hydraulic push rod reaches the set maximum value Mmax, the hydraulic source connected to the electro-hydraulic push rod stops working, and the bottom plate lifted by the electro-hydraulic push rod also rises to the maximum height synchronously; on the contrary, if the electro-hydraulic push rod does not rise to the maximum value Mmax, the hydraulic source continues to work, and the electro-hydraulic push rod continues to push up the bottom plate. For the maximum height of the electro-hydraulic push rod, the maximum stroke can be set according to actual needs. Mmax can be set according to the location where the ball adding machine is installed, and it can be adapted to different working environments according to local conditions.

[0028] After the hydraulic source stops working, the electro-hydraulic push rod and the movable bottom plate fall back to their original positions. If a steel ball rolls through the ball outlet and is caught by the ball catching mechanism, the entire ball loosening work is completed and the electro-hydraulic push rod is in its original position. On the contrary, if no steel ball rolls out from the ball outlet, or a steel ball rolls out but is not caught by the ball catching mechanism, the hydraulic source is started repeatedly until the ball catching mechanism catches the steel ball.

[0029] When the hydraulic source continuous start times Z is not greater than the set allowable continuous start times Zmax, the hydraulic source is started repeatedly, and once the start times Z is greater than the set allowable continuous start times Zmax, that is, Z=Zmax+1, the ball loosening operation fails and an alarm is issued, reminding the staff that the steel balls in the ball storage bin are consumed due to insufficient stock or the ball loosening mechanism fails.

[0030] The method uses an external force, that is, the bottom plate is pushed up by the electro-hydraulic push rod, to rotate around the hinge axis, so that the position arrangement of all steel balls in the ball storage bin can be changed, which has a very good ball loosening effect; the hydraulic device, that is, the electro-hydraulic push rod is used as the external force source, and the flexible characteristics of hydraulic work are utilized to achieve the gentle movement of the entire ball loosening mechanism, without vibration and impact, thereby enhancing the stable and reliable operation of the mechanism; this ball loosening method is used to automatically clean the blocked balls, and the automatic metering control mode of the ball scooping mechanism is used to make the entire logical relationship more concise, smooth, practical and efficient.

[0031] The present invention is not limited to the above-mentioned specific embodiments. Changes, modifications, additions or substitutions made by ordinary technicians in this field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A ball loosening method for a ball adding machine, the method being applied to a ball loosening device for a ball adding machine, the ball loosening device for a ball adding machine comprising a ball adding machine with a ball storage bin (3), a first baffle (5) being arranged at a ball outlet of the ball storage bin (3), wherein: A bottom plate (1) is arranged at the bottom of the ball storage bin (3), and one end of the bottom plate (1) away from the ball outlet is movably connected to the ball storage bin (3). A driving mechanism for driving the bottom plate to move is arranged below the bottom plate (1); the driving mechanism is an electro-hydraulic push rod (6); the bottom plate (1) is hinged to the ball storage bin (3), and the bottom plate (1) can rotate around the hinge. A hydraulic source (7) is arranged below the bottom plate (1), and the hydraulic source (7) is connected to the electro-hydraulic push rod (6); a bracket (8) for supporting the bottom plate (1) is arranged below the bottom plate (1), and a plurality of reinforcing ribs are arranged below the bottom plate (1); a second baffle (4) is arranged on the inner wall of the ball storage bin (3) above the ball outlet; the bottom plate rotates around the hinge axis under the push of the electro-hydraulic push rod, so that the position arrangement of all steel balls in the ball storage bin can be changed; the ball adding machine ball loosening method comprises the following steps: 1) When the ball catching mechanism is in the process of catching the ball, if there is no ball, the driving mechanism is started to push the bottom plate to move; 2) The ball scooping mechanism continues to scoop the ball. If there is still no ball, the driving mechanism is repeatedly started to push the bottom plate up and down; in step 1), if the ball scooping mechanism cannot obtain the steel ball, and the number of times X that it cannot obtain the ball continuously exceeds the set maximum value Xmax, that is, when X=Xmax+1, the driving mechanism is started to push the bottom plate; otherwise, if X≤Xmax, the driving mechanism is not started to push the bottom plate; in step 1), the driving mechanism is an electro-hydraulic push rod. When the lifting height of the electro-hydraulic push rod reaches the set maximum value Mmax, the hydraulic source connected to the electro-hydraulic push rod stops working, and the bottom plate lifted by the electro-hydraulic push rod also rises to the maximum height synchronously; otherwise, if the electro-hydraulic push rod does not rise to the maximum value Mmax, the hydraulic source continues to work, and the electro-hydraulic push rod continues to push up the bottom plate.

2. The ball loosening method of the ball adding machine according to claim 1, characterized in that: After the hydraulic source stops working, the electro-hydraulic push rod and the movable bottom plate fall back to their original positions. If a steel ball rolls through the ball outlet and is caught by the ball catching mechanism, the entire ball loosening work is completed and the electro-hydraulic push rod is in its original position. On the contrary, if no steel ball rolls out from the ball outlet, or a steel ball rolls out but is not caught by the ball catching mechanism, the hydraulic source is started repeatedly until the ball catching mechanism catches the steel ball.

3. The ball loosening method of the ball adding machine according to claim 2, characterized in that: When the hydraulic source continuous start times Z is not greater than the set allowable continuous start times Zmax, the hydraulic source is started repeatedly. Once the start times Z is greater than the set allowable continuous start times Zmax, that is, Z=Zmax+1, the ball loosening operation fails and an alarm is issued.

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