Device for controlling discharging amount of hopper of bucket wheel machine

Abstract

The utility model relates to a device for controlling the discharging amount of a hopper of a bucket wheel machine, which belongs to the technical field of bucket wheel machines and comprises a base, a bucket hook tooth device and a supporting seat. A wheel bucket motor is fixedly arranged at the top of the base, and the output end of the wheel bucket motor is in transmission connection with a speed reducer; a linkage main shaft is fixedly arranged at the output end of the speed reducer, and a wheel bucket hook tooth device is arranged at the other end of the linkage main shaft in a matched mode. The interior of the wheel bucket hook tooth device is connected into a material sliding groove in an obliquely downward mode, and a material guiding groove is fixedly formed in the bottom of the material sliding groove and hinged to the supporting base. The wheel bucket hook tooth device comprises a wheel body and a bucket wheel. The device is simple in structure and convenient to install and use, improves the control precision of the coal taking material flow under the unattended working condition, not only contributes to reducing the labor cost, but also enhances the coal taking accuracy, enhances the precision in a new coal blending combustion mode, and improves the working efficiency. And meanwhile, the device also improves the accuracy, the stability and the safety of the coal taking material flow control of the bucket wheel machine.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bucket wheel machines, in particular to a device for controlling the discharge amount of a bucket wheel machine hopper. BACKGROUND

[0002] Power plants are generally equipped with bucket wheel machines for efficient coal handling. With the development of technology, unattended control mode has been widely accepted by the industry. This mode not only helps to reduce labor costs, but also improves the accuracy and efficiency of coal extraction, especially in the new mode of coal blending combustion, which can significantly enhance the accuracy of blending.

[0003] However, the control of the discharge amount of the hopper is crucial to ensure the stable operation of the entire system. Too fast or too slow discharge will adversely affect the calorific value difference metering of the furnace and the unattended control of the bucket wheel machine. The traditional metering method of adding a belt scale at the horizontal position of the cantilever belt can only be applied to the case of horizontal coal stacking, and cannot meet the precise metering requirements in the coal extraction working condition from 0° to -55° angle range.

[0004] Therefore, a device for controlling the discharge amount of a bucket wheel machine hopper is needed to solve the above problems. SUMMARY

[0005] To solve the above problems, the application provides a device for controlling the discharge amount of a bucket wheel machine hopper, which improves the control accuracy of the coal flow under unattended working conditions.

[0006] To achieve the purpose of the application, the application provides the following technical solutions:

[0007] A device for controlling the discharge amount of a bucket wheel machine hopper, comprising a base, a wheel and bucket hook tooth device, and a support seat.

[0008] A wheel and bucket motor is fixedly arranged on the top of the base, and the output end of the wheel and bucket motor is drivingly connected with a speed reducer.

[0009] A linkage main shaft is fixedly arranged at the output end of the speed reducer, and a wheel and bucket hook tooth device is arranged at the other end of the linkage main shaft.

[0010] A material sliding groove is connected to the inside of the wheel and bucket hook tooth device, a material guide groove is fixedly arranged at the bottom of the material sliding groove, and the material guide groove is hingedly connected with the support seat.

[0011] The wheel and bucket hook tooth device comprises a wheel body and a bucket wheel.

[0012] In a possible implementation, the bucket wheel is embedded in one side of the wheel body and is rotatably connected with the side.

[0013] In a possible implementation, the wheel and bucket hook tooth device further comprises a guard ring, which is fixedly arranged at the center of the wheel body.

[0014] In a possible implementation, the lower end of the retainer is connected with a fixing device, and the other end of the fixing device is connected to the bottom of the wheel body.

[0015] In a possible implementation, the retainer is fixedly connected with a linkage main shaft, and the output end of the linkage main shaft is fixed to the center of the retainer.

[0016] In a possible implementation, a pin shaft type weight sensor is arranged at the hinged position of the support seat and the material guide groove, and the pin shaft type weight sensor is used to detect the weight of the material in the hopper.

[0017] In a possible implementation, the lower angle of insertion of the material sliding groove into the wheel bucket hook tooth device is in linear relationship with the weight measured by the pin shaft type weight sensor.

[0018] In a possible implementation, an angle encoder is fixedly arranged on the linkage main shaft.

[0019] In a possible implementation, the analog quantity of the angle encoder is 4-20 mA.

[0020] In a possible implementation, a PLC controller is further included.

[0021] The utility model has the advantages that:

[0022] The device has simple structure, is convenient to install and use, improves the control precision of the coal taking flow under the unattended working condition, reduces the labor cost, enhances the accuracy of coal taking, strengthens the precision under the new mode of coal blending and blending combustion, and improves the accuracy, stability and safety of the coal taking flow control of the bucket wheel machine. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, but do not constitute a limitation on the application;

[0024] Figure 1 The overall structure schematic view provided by the embodiments of the application is shown in the drawings;

[0025] Reference signs: 1, base; 2, wheel bucket hook tooth device; 201, wheel body; 202, bucket wheel; 203, retainer; 3, support seat; 4, wheel bucket motor; 5, speed reducer; 6, linkage main shaft; 7, material sliding groove; 8, material guide groove. DETAILED DESCRIPTION

[0026] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0027] The terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0028] Embodiment 1

[0029] Figure 1 The overall structure diagram provided for the embodiments of the present application, the present embodiment discloses a device for controlling the discharge amount of a bucket wheel machine hopper, comprising: a base 1, a wheel bucket hook tooth device 2, a support seat 3;

[0030] The wheel bucket motor 4 is fixedly arranged on the top of the base 1, and the output end of the wheel bucket motor 4 is drivingly connected with a speed reducer 5;

[0031] The output end of the speed reducer 5 is fixedly connected with a linkage main shaft 6, and the other end of the linkage main shaft 6 is cooperatively provided with the wheel bucket hook tooth device 2;

[0032] The wheel bucket hook tooth device 2 is internally connected with a material sliding groove 7 downwardly and obliquely, the material sliding groove 7 is fixedly arranged with a material guide groove 8 at the bottom, and the material guide groove 8 is hingedly connected with the support seat 3.

[0033] In a possible implementation, the wheel bucket hook tooth device 2 comprises a wheel body 201, a bucket wheel 202 and a retainer 203.

[0034] In a possible implementation, the bucket wheel 202 is embedded in one side surface of the wheel body 201 and is rotationally connected with the side surface;

[0035] The retainer 203 is fixedly arranged at the center position of the wheel body 201, and a fixing device is connected to the lower end of the retainer 203, and the other end of the fixing device is connected to the bottom of the wheel body 201;

[0036] The retainer 203 is fixedly connected with the linkage main shaft 6, and the output end of the linkage main shaft 6 is fixed to the center of the retainer 203.

[0037] In a possible implementation, the support seat 3 is provided with a pin shaft type weight sensor at the hinge with the material guide groove 8, which is used to detect the weight of the material in the hopper;

[0038] Specifically, the downward angle of the material chute 7 inserted into the wheel bucket hook tooth device 2 is linearly related to the weight measured by the pin shaft type weight sensor.

[0039] In a possible implementation, the linkage main shaft 6 is fixedly provided with an angle encoder;

[0040] Specifically, the angle encoder is used for coordinated action of the control system, and the analog quantity is 4-20mA, which corresponds to 0-1500T / H.

[0041] In a possible implementation, the device for controlling the discharge amount of the hopper of the bucket wheel machine further comprises a PLC controller, and a mainboard, a memory bar, a storage medium and a power supply are used in conjunction with the PLC controller. The power supply is a commercial power supply or a lithium battery. The position of the controller is set by the staff according to the actual situation during operation. The controller is used to control the electrical devices used in the present scheme, including but not limited to the wheel bucket motor 4, the speed reducer 5, the linkage main shaft 6, the weight sensor and the angle encoder. When a display screen is provided, a display card is also provided. For the operating principle of the controller, please refer to “Automatic Control Principle” published by Tsinghua University Press, “Microcontroller Principle and Application Simulation Case” and “Sensor Principle and Application”. Other books in the field can also be read for reference. Other automatic control and electrical devices not mentioned are well known to those skilled in the art, and will not be described here.

[0042] The specific implementation of the present example is as follows:

[0043] The operator first inputs an actual weight signal into the PLC controller. The PLC controller calculates the difference between the actual material flow and the given material flow through the input actual weight signal, and adjusts the speed of the wheel bucket motor 4 through the difference, thereby controlling the material taking speed of the bucket wheel 202. Since the downward angle of the material chute 7 inserted into the wheel bucket hook tooth device 2, i.e. the downward angle of the cantilever, is linearly related to the weight measured by the pin shaft type weight sensor, and the pin shaft type weight sensor detects the weight of the material in the hopper, the measured weight of the material is corrected through the downward angle data of the cantilever to obtain the real-time material weight. The actual material weight of the hopper is obtained by subtracting the gross weight of the hopper from the material, and the actual material flow is calculated in combination with the belt running speed of the bucket wheel 202.

[0044] In the taking material, the program in the PLC controller is pre-set to skip detection in the first five seconds of taking material, and the program starts to detect from the fifth second. Assuming that the discharge is set to 800T / H, the program starts to adjust the speed of the wheel bucket motor 4 to the flow of 800T / H through the feedback value. In order to prevent the mechanism from frequent action caused by data burst, all the sampling values are processed by filtering. The control program detects every five seconds, and if the weight value after five seconds is more than 0.5T higher than the weight value before five seconds, the program sends a fine adjustment instruction to adjust the output of the wheel bucket motor 4. If the error is less than or equal to 0.5T, the output of the wheel bucket motor 4 remains unchanged.

[0045] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them. The present application is not limited to the exact structure described above and illustrated in the drawings, and the specific implementation of the present application should not be limited to the above description. For ordinary skilled in the art to which the present application belongs, various changes and modifications made without departing from the concept of the present application should be considered as falling within the scope of protection of the present application.

Claims

1. A device for controlling the discharge amount of a bucket wheel excavator hopper, characterized in that: It comprises a base (1), a bucket hook device (2), and a support base (3); A bucket wheel motor (4) is fixedly provided on the top of the base (1), and an output end of the bucket wheel motor (4) is transmission-connected to a reducer (5); The output end of the speed reducer (5) is fixedly connected to a linkage main shaft (6), and the other end of the linkage main shaft (6) is cooperatively provided with a wheel bucket hook tooth device (2); The interior of the bucket hook device (2) is connected to a material chute (7) obliquely downward, and a material guide chute (8) is fixedly provided at the bottom of the material chute (7), and the material guide chute (8) is hinged to the support seat (3); The wheel bucket hook tooth device (2) comprises a wheel body (201) and a bucket wheel (202).

2. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 1, characterized in that: The bucket wheel (202) is embedded in a side surface of the wheel body (201) and is rotatably connected to the side surface.

3. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 1, characterized in that: The wheel bucket hook tooth device (2) further comprises a retaining ring (203), and the retaining ring (203) is fixedly arranged at the center position of the wheel body (201).

4. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 3, characterized in that: The lower end of the retaining ring (203) is connected to a fixing device, and the other end of the fixing device is connected to the bottom of the wheel body (201).

5. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 3, characterized in that: The retaining ring (203) is fixedly connected to the linkage main shaft (6), and the output end of the linkage main shaft (6) is fixed to the center of the retaining ring (203).

6. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 1, characterized in that: A pin-type weight sensor is provided at the hinged portion between the support seat (3) and the material guide trough (8), and the pin-type weight sensor is used to detect the weight of the material in the hopper.

7. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 6, characterized in that: The downward angle of the chute (7) when inserted into the bucket hook device (2) is linearly related to the weight measured by the pin-type weight sensor.

8. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 1, characterized in that: An angle encoder is fixedly arranged on the linkage main shaft (6).

9. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 8, characterized in that: The analog quantity of the angle encoder is 4-20mA.

10. The device for controlling the discharge amount of a bucket wheel excavator hopper according to claim 1, characterized in that: Also includes: PLC controller.

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