Electronic weighing coal feeder system

Abstract

The utility model discloses an electronic type weighing coal feeder system which comprises a conveying belt machine, a deviation rectifying piece and a tensioning piece, the conveying belt machine comprises a raw coal hopper, a conveying roller is horizontally and rotatably connected to the raw coal hopper, a conveying belt is connected to the conveying roller in a tensioning mode, and the deviation rectifying piece is horizontally arranged at the top of the raw coal hopper. A tensioning piece is arranged in the middle of the bottom face of the raw coal hopper and used for tensioning and abutting against the conveying belt, a driving motor is horizontally fixed to the raw coal hopper, the output end of the driving motor is connected with a speed measuring machine, the output end of the driving motor is fixed to the end of the conveying roller, and a controller is fixedly assembled on the raw coal hopper. A weighing carrier roller is horizontally arranged on the upper portion of the raw coal hopper and used for supporting the conveying belt, weight sensors are fixedly installed on the two sides of the weighing carrier roller, and the output ends of the weight sensors are electrically connected with the input end of the controller. The utility model overcomes the problems that the existing coal machine is lack of a deviation rectifying structure, and a belt for conveying coal can deviate in the running process.

Description

Technical Field

[0001] The utility model relates to the technical field of coal feeders, in particular to an electronic weighing coal feeder system. Background Art

[0002] Coal feeder is an important auxiliary equipment of coal-fired power plant, mainly used in the boiler coal supply system of thermal power plant. At present, domestic thermal power units mostly use electronic weighing coal feeder, which is a belt feeder with microcomputer-controlled electronic weighing and automatic speed regulation device, which can accurately transport coal blocks to the coal mill, and has the functions of metering, automatic adjustment and control. However, due to the harsh working environment, the currently used coal feeder belt weighing metering system has problems such as low measurement accuracy, poor anti-interference ability, serious linear distortion, signal cannot be transmitted remotely, poor shielding, low resolution, and high maintenance.

[0003] The existing announcement number is CN217675188U, and the name is intelligent weighing coal feeder, which includes a weighing coal feeder body, a feed hopper connected and installed on the upper surface of the weighing coal feeder body, and a weighing platform installed in the weighing coal feeder body. The feed hopper is provided with two U-shaped card plates, and bolts are threadedly installed on the card plates. The tail ends of the bolts pass through the card plates and are threadedly connected to the feed hopper. Support plates are installed on the upper surfaces of the two card plates, and an electric push rod is installed on the lower surface of the support plate. The output of the electric push rod is A dredging rod is installed at the end of the output shaft, and springs are hinged on the left and right sides of the dredging rod. The outer surface of the bottom end of the dredging rod is hinged with two side plates, and the other end of the spring is hingedly connected to the side plate. By setting an electric push rod and a dredging rod, the clamping plate is fixed to the feed hopper with bolts, and then the electric push rod is supported by the support plate. Combined with the dredging rod driven by the output shaft of the electric push rod, the feed hopper is moved up and down, and the material is repeatedly loosened downward, thereby avoiding blockage of the material in the feed hopper.

[0004] However, the above-mentioned coal feeder lacks a correction structure, and the belt conveying coal will deviate during operation. If the on-site inspection is not timely, the belt will deviate seriously and trigger the correction switch to cause the production line to jump. There are safety hazards in conveying coal, which affects the continuity of coal transportation. Utility Model Content

[0005] The utility model aims to provide an electronic weighing coal feeder system, aiming to improve the above-mentioned problems.

[0006] The utility model is achieved in this way:

[0007] An electronic weighing coal feeder system comprises a conveyor belt machine, a deviation correcting member and a tensioning member, wherein the conveyor belt machine comprises a raw coal hopper, a conveyor roller is horizontally rotatably connected to the raw coal hopper, and a conveyor belt is tensionedly connected to the conveyor roller, a deviation correcting member is horizontally arranged on the top of the raw coal hopper, a tensioning member is arranged in the middle of the bottom surface of the raw coal hopper, and the tensioning member is used to tension and press the conveyor belt, a driving motor is horizontally fixed on the raw coal hopper, and a tachometer is connected to the output end of the driving motor, and the output end of the driving motor is fixed to the end of the conveyor roller, a controller is fixedly assembled on the raw coal hopper, a weighing roller is horizontally arranged on the upper part of the raw coal hopper, and the weighing roller is used to support the conveyor belt, weight sensors are fixedly installed on both sides of the weighing roller, and the output end of the weight sensor is electrically connected to the input end of the controller, the output end of the controller is electrically connected to the input end of the driving motor, and the output end of the tachometer is electrically connected to the input end of the controller.

[0008] Furthermore, a coal dropping hopper is vertically arranged at the bottom end of the tail of the raw coal hopper, and the bottom end of the coal dropping hopper is connected and fixed to a coal mill.

[0009] Furthermore, the deviation-correcting component comprises a sliding hole frame, which is horizontally fixed on the raw coal hopper, and a slider plate is horizontally slidably assembled in the sliding hole frame.

[0010] Furthermore, a correction wheel is connected to the top of the slider plate for vertical rotation, and a slide rod is fixed horizontally at one end of the slider plate, and the slide rod is slidably penetrated and inserted into the end of the slide hole frame.

[0011] Furthermore, a deviation-correcting spring is horizontally sleeved on the outside of the slide rod, and two ends of the deviation-correcting spring are respectively fixed to the end of the slide rod and the end of the slide hole frame.

[0012] Furthermore, the tensioning member comprises a tensioning sliding frame, which is vertically fixed on the bottom surface of the raw coal hopper, and a rotating slider is vertically slidably assembled in the tensioning sliding frame.

[0013] Furthermore, one end of the rotating slider is horizontally rotatably connected to a tensioning roller, and a tensioning spring is vertically fixed on the top surface of the rotating slider, and the top end of the tensioning spring is fixed on the top surface of the inner wall of the tensioning slide frame.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the deformation force of the deviation correction spring during use pushes the slide bar to slide horizontally in the slide hole frame, pushes the slider plate to slide horizontally on the slide hole frame, pushes the slider plate to approach the conveyor belt, and the two sides of the conveyor belt are pressed by the deviation correction wheel to limit the conveying position of the conveyor belt, thereby avoiding the conveyor belt from deflecting and ensuring the stability and safety of coal block transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the equipment line connection structure in the embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the conveyor belt in the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the exploded structure of the deviation-correcting component in the embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the exploded structure of the tensioning member in the embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the calculation principle of the coal feeding amount by weight in the embodiment of the utility model;

[0021] Figure 6 It is a block diagram of the internal structure of the AD7190 system in the embodiment of the utility model.

[0022] In the figure: 1. conveyor belt; 11. conveyor roller; 12. raw coal hopper; 13. weighing roller; 131. weight sensor; 14. drive motor; 15. tachometer; 16. controller; 17. coal hopper; 18. coal mill; 2. deviation correction part; 21. slide hole frame; 22. slider plate; 23. slide rod; 24. deviation correction spring; 25. deviation correction wheel; 3. tensioning part; 31. tensioning slide frame; 32. rotating slider; 33. tensioning roller; 34. tensioning spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, an electronic weighing coal feeder system includes a conveyor belt machine 1, a deviation correcting member 2 and a tensioning member 3. The conveyor belt machine 1 includes a raw coal hopper 12, a conveyor roller 11 is horizontally rotatably connected to the raw coal hopper 12, and a conveyor belt is tensionedly connected to the conveyor roller 11. The top of the raw coal hopper 12 is horizontally provided with a deviation correcting member 2, and the middle of the bottom surface of the raw coal hopper 12 is provided with a tensioning member 3, and the tensioning member 3 is used to tension and press the conveyor belt. A driving motor 14 is horizontally fixed on the raw coal hopper 12, and a speed measuring machine 15 is connected to the output end of the driving motor 14, and the output end of the driving motor 14 is fixed to the end of the conveyor roller 11. A controller 1 is fixedly assembled on the raw coal hopper 12. 6. A weighing roller 13 is horizontally arranged on the upper part of the raw coal hopper 12, and the weighing roller 13 is used to support the conveyor belt. Weight sensors 131 are fixedly installed on both sides of the weighing roller 13, and the output end of the weight sensor 131 is electrically connected to the input end of the controller 16, the output end of the controller 16 is electrically connected to the input end of the drive motor 14, and the output end of the tachometer 15 is electrically connected to the input end of the controller 16. A coal drop hopper 17 is vertically arranged at the bottom end of the tail of the raw coal hopper 12, and the bottom end of the coal drop hopper 17 is connected and fixed with a coal mill 18. During use, the drive motor 14 is started to drive the conveyor roller 11 to rotate, and the conveyor belt is tensioned and driven to move. The coal blocks in the raw coal hopper 17 are transported to the tail through the conveyor belt. Then, when the coal blocks pass through the weighing roller 13, the weighing roller 13 measures the weight of the coal blocks on the conveyor belt and transmits them to the weight sensor 131. The weight signal of the weight sensor 131 and the measurement data of the speed measuring machine 15 are transmitted to the controller 16. After processing, the controller 16 processes the electronic weighing coal feeder system through AD7190. The processed information is transmitted to the speed regulating device of the drive motor 14 to regulate the speed of the drive motor 14. The weight data and the speed data of the drive motor 14 are displayed, which is convenient for the workers to remotely control the coal conveying efficiency in the later stage. According to the pulse input by the speed measuring motor, The pulse signal measures the speed of the conveyor belt to obtain the size of the coal feeding rate. The controller continuously compares the actual coal feeding rate with the set value of the 4-20mA coal feeding rate manually entered or input by remote DCS remote control, and then automatically adjusts the conveyor belt speed through PID calculation to achieve the purpose of accurately controlling the coal feeding rate. The weighing coal feeding amount calculation principle diagram is shown in Figure 2. By measuring the coal weight per unit length on the belt q (kg / m) and the belt travel speed v (m / s), the actual coal feeding rate can be obtained. The actual coal feeding rate is integrated with the time t (m / s) to obtain the coal block conveying amount, that is, the actual coal feeding amount. The calculation formula for the coal feeding amount is:

[0025]

[0026] Where W is the amount of coal fed in time t (kg); t0 and t1 are the time it takes for the coal to pass from the conveyor belt position x0 to x1. The amount of coal fed per unit time is defined as the coal feeding rate, which reflects the amount of coal fed per unit time. Its expression is:

[0027] η=qv 2

[0028] The set value of the coal feeding rate of the coal feeder control system is compared with the actual coal feeding rate, and after PID calculation, the frequency converter is controlled to drive the motor speed to achieve real-time control of the coal feeding amount.

[0029] It can be seen from formula 2 that the accuracy of the coal feeder depends largely on the weight of the coal per unit length, and the accuracy of the weight mainly depends on the accuracy of the weighing sensor and the accuracy of the AD converter.

[0030] The conveying system for conveying coal uses the AD7190 for the electronic weighing coal feeder system. The AD7190 has a built-in low-noise 24-bit Σ-Δ ADC, which contains 3 differential analog inputs and an integrated on-chip low-noise instrumentation amplifier, so small signals can be directly input. When the gain is set to 64 and the update rate is 4.17Hz, the root mean square RMS noise of the AD7190 is 27nV. The AD7190 on-chip features include a low-end power switch, reference voltage detection, programmable digital output pins, fuse current control, and an internal clock oscillator. The output data rate can be set by software programming and can vary from 4.17Hz to 470Hz. The AD7190 is powered by a 2.7V to 5.25V power supply. The typical power consumption of the AD7190 is 380μA, and the device is packaged in a 16-lead TSSOP.

[0031] See also Figure 2 and Figure 4 The correcting member 2 includes a sliding hole frame 21, which is horizontally fixed on the raw coal hopper 12, and a slider plate 22 is assembled in the sliding hole frame 21 for horizontal sliding. The top of the slider plate 22 is vertically rotatably connected with a correcting wheel 25, and a sliding rod 23 is horizontally fixed at one end of the slider plate 22, and the sliding rod 23 slides through and is inserted into the end of the sliding hole frame 21, and a correcting spring 24 is horizontally sleeved on the outside of the sliding rod 23, and the two ends of the correcting spring 24 are respectively fixed to the ends of the sliding rod 23 and the ends of the sliding hole frame 21. During use, the deformation force of the correcting spring 24 pushes the sliding rod 23 to slide horizontally in the sliding hole frame 21, pushes the slider plate 22 to slide horizontally on the sliding hole frame 21, and pushes the slider plate 22 to approach the conveying belt. The two sides of the conveying belt are pressed by the correcting wheels 25 to limit the conveying position of the conveying belt, avoid the conveying belt from deflecting, and ensure the stability and safety of coal block conveying.

[0032] See also Figure 2 and Figure 3The tensioning member 3 includes a tensioning slide frame 31, which is vertically fixed on the bottom surface of the raw coal hopper 12, and a rotating slider 32 is vertically slidably assembled in the tensioning slide frame 31, one end of the rotating slider 32 is horizontally rotatably connected to a tensioning roller 33, and a tensioning spring 34 is vertically fixed on the top surface of the rotating slider 32, and the top of the tensioning spring 34 is fixed on the top surface of the inner wall of the tensioning slide frame 31. During use, the rotating sliders 32 at both ends of the tensioning roller 33 slide vertically on the tensioning slide frame 31, and the deformation force of the tensioning spring 34 pushes the rotating slider 32 to slide vertically in the tensioning slide frame 31, ensuring that the tensioning roller 33 presses against the tensioning conveyor belt.

[0033] Working principle: During use, the driving motor 14 is started to drive the conveyor roller 11 to rotate, and the conveyor belt is tensioned to move, driving the coal blocks in the raw coal hopper 17 to be transported toward the tail through the conveyor belt. The deformation force of the correcting spring 24 pushes the slide bar 23 to slide horizontally in the slide hole frame 21, and pushes the slider plate 22 to slide horizontally on the slide hole frame 21, pushing the slider plate 22 to approach the conveyor belt. The two sides of the conveyor belt are pressed by the correcting wheels 25 to limit the conveying position of the conveyor belt, avoiding the conveyor belt from deflecting, and ensuring the stability and safety of coal block transportation.

[0034] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electronic weighing coal feeder system, characterized in that: The invention comprises a conveyor belt machine (1), a deviation-correcting member (2) and a tensioning member (3), wherein the conveyor belt machine (1) comprises a raw coal bucket (12), a conveyor roller (11) is horizontally rotatably connected to the raw coal bucket (12), and a conveyor belt is tensionedly connected to the conveyor roller (11), the deviation-correcting member (2) is horizontally arranged on the top of the raw coal bucket (12), a tensioning member (3) is arranged in the middle of the bottom surface of the raw coal bucket (12), and the tensioning member (3) is used to tension and press the conveyor belt, a driving motor (14) is horizontally fixed on the raw coal bucket (12), and a tachometer (15) is connected to the output end of the driving motor (14), and the driving motor (14) is connected to the output end of the driving motor (14). The output end of the machine (14) is fixed to the end of the conveying roller (11), a controller (16) is fixedly assembled on the raw coal bucket (12), a weighing roller (13) is horizontally arranged on the upper part of the raw coal bucket (12), and the weighing roller (13) is used to support the conveying belt, and weight sensors (131) are fixedly installed on both sides of the weighing roller (13), and the output end of the weight sensor (131) is electrically connected to the input end of the controller (16), the output end of the controller (16) is electrically connected to the input end of the driving motor (14), and the output end of the tachometer (15) is electrically connected to the input end of the controller (16).

2. The electronic weighing coal feeder system according to claim 1, characterized in that: A coal drop hopper (17) is vertically arranged at the bottom end of the tail of the raw coal hopper (12), and a coal mill (18) is connected and fixed to the bottom end of the coal drop hopper (17).

3. The electronic weighing coal feeder system according to claim 2, characterized in that: The deviation correcting member (2) comprises a sliding hole frame (21), the sliding hole frame (21) is horizontally fixed on the raw coal hopper (12), and a slider plate (22) is horizontally slidably assembled in the sliding hole frame (21).

4. The electronic weighing coal feeder system according to claim 3, characterized in that: The top of the slider plate (22) is vertically rotatably connected to a deviation correction wheel (25), and one end of the slider plate (22) is horizontally fixed with a slide rod (23), and the slide rod (23) slides through and is inserted into the end of the slide hole frame (21).

5. The electronic weighing coal feeder system according to claim 4, characterized in that: A deviation-correcting spring (24) is horizontally sleeved on the outside of the slide bar (23), and two ends of the deviation-correcting spring (24) are respectively fixed to the end of the slide bar (23) and the end of the slide hole frame (21).

6. The electronic weighing coal feeder system according to claim 5, characterized in that: The tensioning member (3) comprises a tensioning sliding frame (31), which is vertically fixed on the bottom surface of the raw coal hopper (12), and a rotating sliding block (32) is vertically slidably assembled in the tensioning sliding frame (31).

7. The electronic weighing coal feeder system according to claim 6, characterized in that: One end of the rotating slider (32) is horizontally rotatably connected to a tensioning roller (33), and a tensioning spring (34) is vertically fixed on the top surface of the rotating slider (32), and the top end of the tensioning spring (34) is fixed on the top surface of the inner wall of the tensioning slide frame (31).

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