Weighing coal feeder metering device and verification method

Abstract

The invention provides a weighing coal feeder metering device and a verification method, and belongs to the technical field of weighing instrument verification, and the weighing coal feeder metering device comprises a medium feeder, a weighing conveyor, a forklift, a feeding belt, a supporting carrier roller, a weighing calibration gauge block, a weighing carrier roller, a speed measurement sensor, an electric push rod, a driving motor and a weighing controller. The feeding belt is arranged in the medium feeding machine, the weighing calibration gauge block is erected on the weighing carrier roller, one end of the weighing calibration gauge block is connected with a forklift provided with a movable electric push rod, a weighing sensor is arranged in the weighing carrier roller, and the weighing sensor is connected with the weighing calibration gauge block. Compared with the prior art, the weighing coal feeder real-time calibration method can realize real-time material calibration of the weighing coal feeder under the static and dynamic conditions, effectively improves the metering precision of the weighing coal feeder, and has the advantages of improving the metering precision and stability of the weighing coal feeder, and in addition, real-time material calibration of the weighing coal feeder under the static and dynamic conditions can be realized.

Description

Technical Field

[0001] The invention mainly relates to the technical field of weighing instrument calibration, and in particular to a weighing coal feeder metering device and a calibration method. Background Art

[0002] In the existing weighing coal feeder measurement and calibration technology, the following problems may exist:

[0003] (1) Accuracy error: It may be affected by many factors, such as sensor accuracy, environmental conditions, etc., resulting in certain errors in the measurement results.

[0004] (2) Stability issues: As time goes by or usage conditions change, the stability of the calibration technology may be affected.

[0005] (3) Calibration Difficulty: The calibration process may be complex, require expertise and skills, and may require specific equipment and conditions.

[0006] (4) Environmental adaptability: Under different environmental conditions (such as temperature, humidity, etc.), the performance of the calibration technology may decline.

[0007] (5) Reliability issues: There may be failures or misjudgments that affect the accuracy and reliability of measurement.

[0008] (6) High maintenance cost: Equipment maintenance and calibration may require high costs and time investment.

[0009] (7) Difficulty in detecting abnormal situations: Some abnormal situations, such as sensor failure or interference, may be difficult to detect and handle in a timely manner.

[0010] (8) Inconsistent standards: The calibration technologies of different manufacturers or regions may have inconsistent standards.

[0011] (9) Slow technology updates: As the industry develops, the update of calibration technology may be relatively slow and unable to meet new demands and challenges. These problems have a significant impact on the accuracy of material measurement. Summary of the invention

[0012] The present invention mainly provides a weighing coal feeder metering device and a calibration method to solve the technical problems raised in the above background technology.

[0013] The technical solution adopted by the present invention to solve the above technical problems is:

[0014] A weighing coal feeder metering device comprises a coal feeder, a weighing conveyor, a forklift, a feeding belt, a supporting roller, a weighing calibration block, a weighing roller, a speed sensor, an electric push rod, a driving motor, and a weighing controller. The upper shell of the coal feeder is provided with a feed hopper, the feeding belt is arranged inside the coal feeder, the weighing calibration block is mounted on the weighing roller, the electric push rod is installed on the forklift, the electric push rod is driven by the driving motor, one end of the weighing calibration block is connected to the forklift equipped with a movable electric push rod, the weighing roller is provided with a weighing sensor, and the weighing sensor and speed sensor in the weighing roller and the driving motor are electrically connected to the weighing controller.

[0015] Furthermore, in the present invention, the weighing controller is a programmable controller, comprising a data acquisition module, a display module and a programmable module.

[0016] Furthermore, in the present invention, the data acquisition module collects and transmits data to the display module in real time. The data acquisition module collects data and automatically calculates the actual correction coefficient through the programmable module. When the relative error between any two calibration experiments is ≤0.2%, the weighing controller stops the calibration and prompts that the coal feeder calibration is qualified.

[0017] Furthermore, in the present invention, the weighing controller can perform static precise weight calibration and dynamic precise weight calibration.

[0018] Further, in the present invention, the calibration method used in any of the above-mentioned weighing coal feeder metering devices is:

[0019] When the coal feeder stops running, static weight calibration is performed on the weighing system consisting of a weighing calibration block, a weighing roller and an electric push rod: first, the weighing controller is zeroed, and then the weighing calibration block with a known weight is placed on the feeding belt through the electric push rod. The weighing controller performs static weight calibration through the weighing sensor in the weighing roller;

[0020] Dynamic weight calibration is performed during the normal operation of the coal feeder. The weighing system consisting of a weighing calibration block, weighing rollers, a speed sensor, an electric push rod, a drive motor, and a weighing controller is used to dynamically weigh the heavier material online: first, the speed sensor feeds back to the weighing controller to record the running speed in real time. The weighing controller gives the specifications and quantity of the required weighing calibration blocks based on the quality of the coal in the effective weighing section, combined with the length and width of the feeding belt, the length of the effective weighing section, and the running speed of the belt. According to the conventional calibration method, the zero point calibration and range calibration of the feeding belt are completed; the weighing controller controls the electric push rods to evenly weigh the coal in turn according to the specifications and quantity of the weighing calibration blocks obtained through the drive motor. The weighing controller records the actual cumulative mass measured; the weighing controller calculates the actual correction coefficient K1 according to the formula "actual correction coefficient = calibrated standard mass × original correction coefficient / actual cumulative mass" according to the programmed program, where the calibrated standard mass is the total mass of all weighing calibration blocks and the initial value of the original correction coefficient is 1; the above steps are repeated three or more times to obtain the ranges K2, K3, K4, etc., so that the relative error between the actual cumulative mass and the calibrated standard mass is ≤1%; when the relative error between any two calibration experiments is ≤0.2%, the weighing controller stops the calibration and prompts that the coal feeder has passed the calibration.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention can realize real-time physical calibration of the weighing coal feeder in static and dynamic conditions, effectively improving the metering accuracy of the weighing coal feeder. Compared with the prior art, the present invention has the advantages of improving the metering accuracy and stability of the weighing coal feeder, and can also realize real-time physical calibration of the weighing coal feeder in static and dynamic conditions;

[0023] The technology of the present invention avoids adding an electric weighing calibration object control forklift and a weighing controller, and avoids the error caused by the time interval of manually placing weights; in addition, the weighing controller automatically calculates and records the actual correction coefficient in real time, reducing manual recording and calculation errors.

[0024] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the regional structural connection of the coal feeder of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the electric single-wheel weighing and calibration object control forklift of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the electric two-wheel weighing and calibration object control forklift of the present invention.

[0028] In the figure: 1. Feeding belt; 2. Support roller; 3. Weighing calibration block; 4. Weighing roller; 5. Speed ​​sensor; 6. Electric push rod; 7. Drive motor; 8. Weighing controller. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central 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 a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used 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.

[0032] For examples, please refer to the attached Figure 1-3 A weighing coal feeder metering device includes a coal feeder, a weighing conveyor, a forklift, a feeding belt 1, a supporting roller 2, a weighing calibration block 3, a weighing roller 4, a speed sensor 5, an electric push rod 6, a driving motor 7, and a weighing controller 8. The upper shell of the coal feeder is provided with a feed hopper, the feeding belt 1 is arranged inside the coal feeder, the weighing calibration block 3 is mounted on the weighing roller 4, the electric push rod 6 is installed on the forklift, the electric push rod 6 is driven by the driving motor 7, one end of the weighing calibration block 3 is connected to the forklift equipped with a movable electric push rod 6, the weighing roller 4 is provided with a weighing sensor, and the weighing sensor and speed sensor 5 in the weighing roller 4 and the driving motor 7 are all electrically connected to the weighing controller 8.

[0033] Furthermore, the weighing controller 8 is a programmable controller, comprising a data acquisition module, a display module and a programmable module;

[0034] The data acquisition module collects and transmits data to the display module in real time. The data acquisition module collects data and automatically calculates the actual correction coefficient through the programmable module. When the relative error between any two calibration experiments is ≤0.2%, the weighing controller 8 stops the calibration and prompts that the coal feeder has passed the calibration.

[0035] For details, please refer to the attached Figure 2 and attached Figure 3 , the weighing controller 8 can perform static precise weight calibration and dynamic precise weight calibration;

[0036] It should be noted that, in this embodiment, the device for weighing and calibrating the object is controlled by an electric weighing and calibrating object forklift, and the device for weighing and calibrating the object is an electric single-wheel weighing or an electric double-wheel weighing, which is convenient for removing the weighing and calibrating block 3 from the housing of the feeder.

[0037] Further, the calibration method used by any of the above-mentioned weighing coal feeder metering devices is:

[0038] When the coal feeder stops running, static weight calibration is performed on the weighing system composed of the weighing calibration block 3, the weighing roller 4 and the electric push rod 6: first, the weighing controller 8 is zeroed, and then the weighing calibration block 3 of known weight is placed on the feeding belt 1 through the electric push rod 6, and the weighing controller 8 performs static weight calibration through the weighing sensor in the weighing roller 4;

[0039] In this embodiment, the specific implementation operation is as follows: Zero point calibration is the basic step in the calibration of the weighing coal feeder, which aims to ensure that the weighing system can read accurately when no material passes. During the calibration process, it is first necessary to confirm that the coal on the feeding belt 1 has been cleared, and the control instruction for the weighing coal feeder is set to 100%, and the belt speed is set to 0.64m / s; then, the zero point calibration process is started by clicking the RUN button on the controller panel. This process includes automatic zeroing and manual input of the zero point value to ensure that when zero material passes, the reading is stable at around 0t / h, and the fluctuation range is within ±1t / h. The weighing calibration block 3 hanging weight calibration is carried out by hanging weights of known weight on the coal feeder. Two weights are hung on one side for calibration. Enter the range adjustment screen through the MENU button on the panel, select the appropriate interval calibration, and then perform automatic calibration. After the calibration is completed, observe that the instantaneous coal volume on the belt should be around a specific value, such as around 103t / h. After removing one weight, the instantaneous coal volume should drop to around 57t / h. After removing all weights, it should return to 0t / h, and the instantaneous volume fluctuation at each point should not exceed 1t / h.

[0040] Dynamic weight calibration is performed during the normal operation of the coal feeder. The weighing system consisting of the weighing calibration block 3, weighing roller 4, speed sensor 5, electric push rod 6, drive motor 7 and weighing controller 8 is used to dynamically weigh the heavier material online: first, the speed sensor 5 feeds back to the weighing controller 8 to record the running speed in real time. The weighing controller 8 gives the specifications and quantity of the required weighing calibration block 3 according to the quality of the coal in the effective weighing section, combined with the belt length, width, length of the effective weighing section and the running speed of the belt of the feeding belt 1, and completes the zero point calibration and range calibration of the feeding belt 1 according to the conventional calibration method; the weighing controller 8 controls the electric push rod 6 through the drive motor 7 according to the obtained specifications and quantity of the weighing calibration block 3. The rods 6 are placed uniformly on the feeding belt 1 in sequence, and are passed through the effective weighing section in sequence, and the weighing controller 8 records the actual cumulative mass measured; the weighing controller 8 calculates the actual correction coefficient K1 according to the formula "actual correction coefficient = calibrated standard mass × original correction coefficient / actual cumulative mass" according to the programmed program, wherein the calibrated standard mass is the total mass of all weighing calibration blocks, and the initial value of the original correction coefficient is 1; the above steps are repeated three or more times to obtain the ranges K2, K3, K4, etc. in sequence, so that the relative error between the actual cumulative mass and the calibrated standard mass is ≤1%; when the relative error between any two calibration experiments is ≤0.2%, the weighing controller 8 stops the calibration and prompts that the coal feeder has passed the calibration;

[0041] In this embodiment, the specific implementation operation is: if the length of the feeding belt 1 is 6m, the length of the effective weighing section is 0.5m, and the mass of the coal in the effective weighing section is 65kg, the required weight specifications can be determined according to the effective mass per unit length. The effective mass per unit length of the coal mill is: 65kg÷0.5m=130kg / m; the standard weight size is selected as: 153mm long, 113mm wide, 135mm high, the standard weight is 10kg, and the accuracy error is 0.5g; verify whether it meets the above results: Therefore, two weighing calibration blocks 3 are placed side by side through the electric push rod 6, and the mass of the effective weighing section of the feeding belt 1 is 65.4 kg, which is basically consistent with the mass of the coal passing through the effective weighing section; the number of standard weights of the weighing calibration blocks 3 required can be calculated according to the length of the feeding belt 1, that is, = 78 standard weights. According to the conventional calibration method, the zero point calibration and range calibration of the feeding belt 1 are completed; the weighing controller 8 controls the electric push rod 6 to be placed on the feeding belt 1 in sequence and uniformly through the driving motor 7 according to the obtained specifications and quantity of the weighing calibration block 3, and makes it pass through the effective weighing section in sequence, and the weighing controller 8 records the measured actual cumulative mass; the weighing controller 8 calculates the actual correction coefficient K1 according to the formula "actual correction coefficient = calibration standard mass × original correction coefficient / actual cumulative mass" according to the programmed program, and the relative error is: actual cumulative mass - standard weighing calibration block weight mass / actual cumulative mass, such as, for the first time: the actual cumulative mass is 780.5kg, the standard weighing calibration block 3 weight is 780kg, the actual correction coefficient is 1, the difference is 0.5kg, and the relative error is 0.5kg÷780.5kg=0.06%. Continue to repeat the above steps three times or more to obtain the ranges K2, K3, K4... in turn, so that the relative error between the actual cumulative mass and the calibrated standard mass is ≤1%; when the relative error between any two calibration experiments is ≤0.2%, the weighing controller 8 stops the calibration and prompts that the coal feeder calibration is qualified.

[0042] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A weighing coal feeder metering device, characterized in that: The invention comprises a feeder, a weighing conveyor, a forklift, a feed belt (1), a supporting roller (2), a weighing calibration block (3), a weighing roller (4), a speed sensor (5), an electric push rod (6), a drive motor (7), and a weighing controller (8). The upper shell of the feeder is provided with a feed hopper. The feed belt (1) is arranged inside the feeder. The weighing calibration block (3) is mounted on the weighing roller (4). The electric push rod (6) is installed on the forklift. The electric push rod (6) is driven by the drive motor (7). One end of the weighing calibration block (3) is connected to the forklift equipped with the movable electric push rod (6). The weighing roller (4) is provided with a weighing sensor. The weighing roller (4) has the weighing sensor and the speed sensor (5) in the weighing roller (4) and the drive motor (7) all being electrically connected to the weighing controller (8).

2. A weighing coal feeder metering device according to claim 1, characterized in that: The weighing controller (8) is a programmable controller, comprising a data acquisition module, a display module and a programmable module.

3. A weighing coal feeder metering device according to claim 2, characterized in that: The data acquisition module collects data in real time and transmits it to the display module. The data acquisition module collects data and automatically calculates the actual correction coefficient through the programmable module. When the relative error between any two calibration experiments is ≤0.2%, the weighing controller (8) stops the calibration and prompts the coal feeder to pass the calibration.

4. A weighing coal feeder metering device according to claim 1, characterized in that: The weighing controller (8) can perform static precise weight calibration and dynamic precise weight calibration.

5. The calibration method used in any one of the weighing coal feeder metering devices according to claims 1 to 4, characterized in that: When the coal feeder stops running, static weight calibration is performed on the weighing system composed of a weighing calibration block (3), a weighing roller (4) and an electric push rod (6): first, the weighing controller (8) is zeroed, and then the weighing calibration block (3) of known weight is placed on the feeding belt (1) through the electric push rod (6), and the weighing controller (8) performs static weight calibration through the weighing sensor in the weighing roller (4); The coal feeder is subjected to dynamic weight calibration during normal operation. The weighing system consisting of a weighing calibration block (3), a weighing roller (4), a speed sensor (5), an electric push rod (6), a driving motor (7), and a weighing controller (8) is used to dynamically weigh the material online. First, the speed sensor (5) feeds back to the weighing controller (8) to record the running speed in real time. The weighing controller (8) gives the specifications and quantity of the required weighing calibration block (3) according to the quality of the coal in the effective weighing section, the length and width of the feeding belt (1), the length of the effective weighing section, and the running speed of the belt. The zero point calibration and the range calibration of the feeding belt (1) are completed according to the conventional calibration method. The weighing controller (8) obtains the specifications and quantity of the weighing calibration block (3) through the driving motor (7). The motor (7) controls the electric push rod (6) to be placed uniformly on the feeding belt (1) in sequence, and makes it pass through the effective weighing section in sequence, and the weighing controller (8) records the measured actual cumulative mass; the weighing controller (8) calculates the actual correction coefficient K1 according to the formula "actual correction coefficient = calibration standard mass × original correction coefficient / actual cumulative mass" according to the programmed program, wherein the calibration standard mass is the total mass of all weighing calibration blocks, and the initial value of the original correction coefficient is 1; the above steps are repeated three or more times to obtain the ranges K2, K3, K4, etc. in sequence, so that the relative error between the actual cumulative mass and the calibration standard mass is ≤1%; when the relative error between any two calibration experiments is ≤0.2%, the weighing controller (8) stops the calibration and prompts that the coal feeder is qualified.

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