Automatic frequency modulation device of bar feeder and control method

Abstract

The invention discloses an automatic frequency modulation device for a bar feeder and a control method. The automatic frequency modulation device is composed of a feeding ore bin, a level gage A, the bar feeder, a jaw crusher, a level gage B, an ore conveying belt and a current transmitter. A material level indicator A is installed on the top of a feeding ore bin, a material level indicator B is installed on a feeding port of a jaw crusher, the control method comprises the steps that the frequency of the bar feeder is determined by detecting the size of the material level indicator A, the size of the material level indicator B and the size of an ore conveying belt current transducer, and automatic frequency modulation feeding production of the bar feeder is achieved. Automatic frequency modulation production of equipment can be realized after a yield target value is input, manual judgment and operation are reduced, and the processing capacity of a production line is improved; when the material level indicator detects ore blockage, the feeding frequency is reduced immediately, and after the detected material level returns to normal, automatic frequency modulation is recovered, so that ore overflowing accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of bar feeders, and in particular to an automatic frequency modulation device and a control method for a bar feeder. Background Art

[0002] Grizzle feeders usually use vibration motors or exciters as the excitation source. When two vibration motors run in opposite directions at the same angular velocity, the inertial force generated by their eccentric blocks is repeatedly superimposed or offset at a specific phase, thereby generating a huge synthetic excitation force, causing the machine body to vibrate on the supporting spring. Under the action of vibration, the material slides and throws on the grating screen surface, thereby continuously moving forward, achieving uniform feeding from the storage bin or funnel to the receiving equipment. At the same time, due to the action of the grating screen surface, materials smaller than the grating gap will fall through the gap, achieving a screening effect.

[0003] The feeding is uniform and stable, and can feed block and granular materials from the storage bin to the receiving device evenly, regularly and continuously, preventing the receiving device from freezing due to uneven feeding and other problems, ensuring a smooth production process.

[0004] With screening function, the bar screen surface can allow materials smaller than the bar gap to pass through, realize pre-screening, remove fine materials such as soil, optimize the particle size of materials entering the crusher, improve the working efficiency of subsequent crushing equipment, and reduce energy consumption.

[0005] The structure is simple and maintenance is convenient. The overall structure is relatively simple, without complicated transmission components and few wearing parts. It is easy to use and maintain, which reduces the maintenance time and cost of the equipment and improves the operation rate of the equipment by 15.

[0006] Flexible adjustment, the feed flow rate can be changed and controlled at any time by adjusting the exciting force, the speed of the vibration motor or the position of the eccentric block to meet the requirements of different production processes356.

[0007] Grizzle feeders are widely used in mining, metallurgy, construction and other industries. They are suitable for feeding building stones, metal ores and other materials before coarse crushing. In the actual operation of grizzle feeders, due to the influence of the properties of feed ore, different ore sizes and the processing capacity of subsequent equipment, the operating frequency of grizzle feeders needs to be adjusted in time to avoid low output or overflow accidents.

[0008] Therefore, the applicant, based on many years of rich experience in design, development and actual production in the relevant industry, has conducted research and improvements on the existing structures and deficiencies, and provided an automatic frequency regulation device and control method for a rod feeder, in order to achieve a more practical purpose. Summary of the invention

[0009] 1. Technical issues to be resolved

[0010] In view of the shortcomings of the prior art, the present invention provides an automatic frequency regulation device and control method for a grizzly feeder, which solves the problem of timely adjusting the operating frequency of the grizzly feeder due to the influence of the properties of the feed ore, the different sizes of the ore and the processing capacity of the subsequent equipment, so as to avoid low output or overflow accidents.

[0011] (II) Technical solution

[0012] It can realize automatic frequency regulation of feeding production of grizzly feeder, keep crusher, ore conveyor belt and other equipment stably in a relatively saturated state, improve the processing capacity of the production line, reduce manual intervention and reduce production costs.

[0013] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic frequency modulation device for a grizzly feeder, comprising a feeding ore bin, a level meter A, a grizzly feeder, a jaw crusher, a level meter B, an ore transport belt, and a current transmitter, wherein the level meter A is arranged at the upper opening of the feeding ore bin, and the grizzly feeder is arranged below the ore bin; a jaw crusher is arranged below the discharge port of the grizzly feeder, a level meter B is arranged above the feed port of the jaw crusher, an ore transport belt is arranged at the bottom of the discharge port of the jaw crusher, and a current transmitter is arranged on the power outlet line of the ore transport belt; the operating frequency of the grizzly feeder is determined by detecting the numerical values ​​of the level meter A, the level meter B, the ore transport belt and the current transmitter, so as to realize automatic frequency modulation feeding production of the grizzly feeder.

[0014] Preferably, the level meter A is used to detect the level of the feed ore bin, the level meter B is used to detect the level of the feed port of the jaw crusher, the current transmitter is used to detect the actual current during the operation of the ore transport belt, and the level meter A is only used for reference and alarm.

[0015] Preferably, the maximum value of the material level meter B is set to 55% of the feed port volume.

[0016] Preferably, the frequency of the rod feeder is mainly determined by the detection value of the current transmitter, and the detection value of the current transmitter is compared with the set target value to perform PID automatic adjustment of the rod feeder; when the real-time current of the ore transport belt is greater than the set value, the frequency of the rod feeder will decrease, and when the real-time current of the ore transport belt is less than the set value, the frequency of the rod feeder will increase.

[0017] Preferably, when the material level meter B detects that the material level is greater than 55% of the set value, the frequency of the rod feeder is forcibly set to 25Hz. When the material level returns to a normal value, the forced setting frequency is cancelled and automatic frequency regulation is restored.

[0018] An automatic frequency modulation device and control method for a bar feeder, including an automatic frequency modulation device for a bar feeder, and the specific steps are as follows:

[0019] S1: System initialization, system power-on, setting target current value parameters and maximum frequency parameters;

[0020] S2: Automatic frequency control. Click the automatic frequency button. The frequency of the grizzly feeder will be PID-adjusted by the real-time current of the conveyor belt and the set value. When the real-time current of the conveyor belt is greater than the set value, the frequency of the grizzly feeder will decrease. When the real-time current of the conveyor belt is less than the set value, the frequency of the grizzly feeder will increase.

[0021] S3: Material level signal acquisition and equipment protection. During the automatic feeding process, there are also protection programs for the jaw crusher material level and the medium crusher material level. When the jaw crusher material level or the medium crusher material level exceeds 55%, the grizzly feeder frequency is forced to be set to 25Hz. When the material level returns to 42%, the forced given frequency is cancelled and automatic frequency modulation is restored.

[0022] (III) Beneficial effects

[0023] The present invention provides an automatic frequency modulation device and control method for a bar feeder, which has the following beneficial effects:

[0024] (1) The automatic frequency modulation device and control method of the grizzly feeder determines the frequency of the grizzly feeder by detecting the actual current of the ore conveying belt. At the same time, when the material level reaches the upper limit, the frequency of the grizzly feeder is automatically reduced to avoid low production or ore overflow accidents.

[0025] (2) The automatic frequency regulation device and control method of the bar feeder realize the automatic frequency regulation feeding production of the bar feeder, reduce manual intervention, reduce production costs, and improve the processing capacity of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the automatic frequency modulation feeding structure of the bar feeder of the present invention;

[0027] Figure 2 The present invention is a block diagram of the automatic frequency modulation feeding control method of the rod feeder.

[0028] In the figure: 1. Feed ore bin; 2. Material level meter A; 3. Rod feeder; 4. Jaw crusher; 5. Material level meter B; 6. Ore transport belt; 7. Current transmitter. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-2 The present invention provides a technical solution: an automatic frequency modulation device for a grizzly feeder, comprising a feeding ore bin 1, a level meter A2, a grizzly feeder 3, a jaw crusher 4, a level meter B5, an ore conveying belt 6, and a current transmitter 7. The level meter A2 is arranged at the upper opening of the feeding ore bin 1, and the grizzly feeder 3 is arranged below the ore bin 1; the jaw crusher 4 is arranged below the discharge port of the grizzly feeder 3, the level meter B5 is arranged above the feed port of the jaw crusher 4, the ore conveying belt 6 is arranged at the bottom of the discharge port of the jaw crusher 4, and the current transmitter 7 is arranged on the power outlet line of the ore conveying belt 6; by detecting the numerical values ​​of the level meter A2, the level meter B5, the ore conveying belt 6 and the current transmitter 7, the operating frequency of the grizzly feeder 3 is determined, and the automatic frequency modulation feeding production of the grizzly feeder 3 is realized.

[0031] Through the design of the above device, the grizzly feeder can realize automatic frequency regulation feeding production, so that equipment such as crushers and ore conveyor belts can be stably maintained in a relatively saturated state, reducing manual intervention, reducing production costs, and improving the processing capacity of the production line.

[0032] like Figure 1 As shown, the material level meter A2 is used to detect the material level of the feed ore bin 1, the material level meter B5 is used to detect the material level of the feed port of the jaw crusher 4, and the current transmitter 7 is used to detect the actual current during the operation of the ore conveying belt 6. The material level meter A2 is only used for reference and alarm. The maximum value of the material level meter B5 is set to 55% of the feed port volume.

[0033] The frequency of the rod feeder 3 is mainly determined by the detection value of the current transmitter 7. The detection value of the current transmitter 7 is compared with the set target value to perform PID automatic adjustment of the rod feeder 3; when the real-time current of the ore transport belt 6 is greater than the set value, the frequency of the rod feeder 3 will decrease, and when the real-time current of the ore transport belt 6 is less than the set value, the frequency of the rod feeder 3 will increase.

[0034] When the material level meter B5 detects that the material level is greater than 55% of the set value, the frequency of the rod feeder 3 is forced to be set to 25Hz. When the material level returns to the normal value, the forced setting frequency is cancelled and the automatic frequency regulation is restored.

[0035] When working, Figure 2 As shown, an automatic frequency modulation device and control method for a bar feeder include an automatic frequency modulation device for a bar feeder, and the specific steps are as follows:

[0036] S1: System initialization, system power-on, setting target current value parameters and maximum frequency parameters;

[0037] S2: Automatic frequency control. Click the automatic frequency control button. The frequency of the grizzly feeder 3 will be PID-regulated by the real-time current of the ore conveying belt 6 and the set value. When the real-time current of the ore conveying belt 6 is greater than the set value, the frequency of the grizzly feeder 3 will decrease. When the real-time current of the ore conveying belt 6 is less than the set value, the frequency of the grizzly feeder 3 will increase.

[0038] S3: Material level signal collection and equipment protection. During the automatic feeding process, there are also protection programs for the material level of jaw crusher 4 and the material level of medium crusher. When the material level of jaw crusher 4 or the material level of medium crusher exceeds 55%, the frequency of grizzly feeder 3 is forced to be set to 25Hz. When the material level returns to 42%, the forced given frequency is cancelled and automatic frequency modulation is restored.

[0039] In summary, the automatic frequency regulation device and control method of the grizzly feeder determines the frequency of the grizzly feeder by detecting the actual current of the ore conveying belt. At the same time, the frequency of the grizzly feeder is automatically reduced when the material level reaches the upper limit to avoid low production or ore overflow accidents.

[0040] The automatic frequency modulation device and control method for the bar feeder realize the automatic frequency modulation feeding production of the bar feeder, reduce manual intervention, reduce production costs, and improve the processing capacity of the production line.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] 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 frequency modulation device for a grizzly feeder, comprising a feed ore bin (1), a material level meter A (2), a grizzly feeder (3), a jaw crusher (4), a material level meter B (5), an ore conveying belt (6), and a current transmitter (7), characterized in that: A material level meter A (2) is arranged at the upper opening of the feed ore bin (1), and a grizzly feeder (3) is arranged below the feed ore bin (1); a jaw crusher (4) is arranged below the discharge port of the grizzly feeder (3), a material level meter B (5) is arranged above the feed port of the jaw crusher (4), an ore transport belt (6) is arranged at the bottom of the discharge port of the jaw crusher (4), and a current transmitter (7) is arranged at the power outlet of the ore transport belt (6); the operating frequency of the grizzly feeder (3) is determined by detecting the numerical values ​​of the material level meter A (2), the material level meter B (5), the ore transport belt (6) and the current transmitter (7), so as to realize automatic frequency modulation feeding production of the grizzly feeder (3).

2. The automatic frequency modulation device for a bar feeder according to claim 1, characterized in that: The material level meter A (2) is used to detect the material level of the feed ore bin (1), the material level meter B (5) is used to detect the material level at the feed port of the jaw crusher (4), and the current transmitter (7) is used to detect the actual current during the operation of the ore transport belt (6). The material level meter A (2) is only used for reference and alarm.

3. The automatic frequency modulation device for a bar feeder according to claim 1, characterized in that: The maximum value of the material level meter B (5) is set to 55% of the feed port volume.

4. The automatic frequency modulation device for a bar feeder according to claim 1, characterized in that: The frequency of the grizzly feeder (3) is mainly determined by the detection value of the current transmitter (7), and the detection value of the current transmitter (7) is compared with the set target value to perform PID automatic adjustment of the grizzly feeder (3); when the real-time current of the ore conveying belt (6) is greater than the set value, the frequency of the grizzly feeder (3) will decrease, and when the real-time current of the ore conveying belt (6) is less than the set value, the frequency of the grizzly feeder (3) will increase.

5. The automatic frequency modulation device for a bar feeder according to claim 1, characterized in that: When the material level meter B (5) detects that the material level is greater than 55% of the set value, the frequency of the rod feeder (3) is forcibly set to 25Hz. When the material level returns to the normal value, the forced setting frequency is cancelled and the automatic frequency regulation is restored.

6. An automatic frequency modulation device and control method for a bar feeder, characterized in that: The invention comprises the automatic frequency regulation device for a bar feeder as claimed in claim 1, wherein the specific steps are as follows: S1: System initialization, system power-on, setting target current value parameters and maximum frequency parameters; S2: Automatic frequency control. Click the automatic frequency control button. The frequency of the grizzly feeder (3) will be PID-regulated by the real-time current of the ore conveying belt (6) and the set value. When the real-time current of the ore conveying belt (6) is greater than the set value, the frequency of the grizzly feeder (3) will decrease. When the real-time current of the ore conveying belt (6) is less than the set value, the frequency of the grizzly feeder (3) will increase. S3: Material level signal acquisition and equipment protection. During the automatic feeding process, there are also protection procedures for the material level of the jaw crusher (4) and the medium crusher. When the material level of the jaw crusher (4) or the medium crusher exceeds 55%, the frequency of the grizzly feeder (3) is forced to be set to 25Hz. When the material level returns to 42%, the forced setting frequency is cancelled and automatic frequency modulation is restored.

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