A boiler primary air pulverized coal flow monitoring device

Abstract

The utility model discloses a kind of boiler primary air pulverized coal flow monitoring devices, it is related to pulverized coal quantity detection technical field, including multiple groups of detection head rotationally installed in conveying pipeline, the position of multiple groups of detection head in conveying pipeline can be adjusted along the circumference of conveying pipeline, improve the detection precision of detection head to pulverized coal quantity, simultaneously, the utility model locks multiple groups of detection head, avoid the deflection of detection head in the process of detection to cause influence to detection result, the support plate rotationally arranged in conveying pipeline drives multiple groups of detection head to rotate, simultaneously, support plate can be wiped to detection head, avoid the deviation of detection result caused by the pollution of detection head surface, the utility model improves the detection precision of coal quantity in primary air pipeline.

Description

Technical Field

[0001] This utility model relates to the field of coal powder quantity detection technology, and in particular to a boiler primary air coal powder flow monitoring device. Background Technology

[0002] In industrial production processes such as coal-fired power plants, coal chemical plants, and blast furnace injection, accurate and continuous monitoring of pulverized coal flow in pipelines is crucial for ensuring stable system operation, optimizing combustion efficiency, and achieving precise control. Microwave-based measurement technology, due to its non-contact nature and strong penetration, shows promising application prospects in this field. This technology calculates the concentration and velocity of pulverized coal by analyzing the phase, frequency, or amplitude changes that occur after microwaves pass through the pulverized coal medium. However, several challenges remain when applying microwave monitoring technology to industrial pipelines. Because pulverized coal may exhibit uneven concentration distribution and asymmetrical flow fields across the pipeline cross-section, measurements taken at a single point on the pipeline wall or along a fixed diameter often fail to accurately reflect the average flow rate across the entire cross-section, leading to representativeness errors and affecting the accuracy and reliability of the measurements. To adapt to different pipe diameters or obtain more comprehensive cross-sectional information, the measuring probe needs to be adjustable in position. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model discloses a boiler primary air pulverized coal flow monitoring device.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a boiler primary air pulverized coal flow monitoring device, including a conveying pipe, a mounting frame, a rotor and a rotating ring rotatably arranged inside the conveying pipe, a plurality of detection heads arranged on the mounting frame, the detection heads being connected to the rotor, a stator and a locking column also arranged on the conveying pipe, the stator supplying power to the rotor, the rotor supplying power to the detection heads, a support plate arranged on the rotating ring, a wiping head arranged on the support plate, and the wiping head wiping the detection heads.

[0005] Furthermore, a locking ring is rotatably installed inside the conveying pipe, and the locking ring is provided with multiple sets of limiting holes. A locking pin is slidably installed inside the conveying pipe, and the locking pin is inserted into the limiting holes.

[0006] Furthermore, a spring is provided between the locking pin and the delivery pipe.

[0007] Furthermore, the side of the locking post that fits into the limiting hole is all set as an inclined surface.

[0008] Furthermore, a limit block is provided on the locking ring, the limit block is connected to the mounting bracket, and the support plate is in contact with the limit block.

[0009] Furthermore, a motor is installed inside the conveying pipe, a second gear is installed on the output shaft of the motor, and a first gear is coaxially installed on the rotating ring, with the second gear meshing with the first gear.

[0010] Furthermore, the stator is provided with wires, which pass through the delivery pipe and are connected to the power supply.

[0011] Furthermore, the motor is equipped with a power cord, which passes through the conveying pipe and is connected to the power source. Both the power cord and the wires on the motor use gland heads to pass through the conveying pipe.

[0012] Furthermore, a wiping plate is slidably disposed within the support plate, and the wiping head is mounted on the wiping plate.

[0013] Furthermore, a second spring is provided between the wiping plate and the support plate.

[0014] The advantages of this utility model compared with the prior art are as follows: The detection head set by this utility model can adjust the detection position and change the detection point, thereby improving the detection accuracy of the amount of coal powder in the conveying pipeline. After the position of the detection head is adjusted, the detection head is locked to prevent the position of the detection head from changing due to vibration or other reasons. There is a gap between the component that drives the detection head to adjust its position and the position where the detection head is installed, which reduces the impact on the wind speed and amount of coal powder at the detection position of the detection head. At the same time, the detection head is automatically cleaned after working for a long time to ensure the detection accuracy of the detection head. Attached Figure Description

[0015] Figure 1 This is a front view of the overall structure of this utility model.

[0016] Figure 2 for Figure 1 Cross-sectional view of the structure along the AA direction.

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B.

[0018] Figure 4 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 5 This is a partial structural diagram of the present invention.

[0020] Figure 6 This is a cross-sectional view of the support plate structure of this utility model.

[0021] Reference numerals in the attached drawings: 1-Conveying pipe; 2-Support plate; 3-Limiting block; 4-Wire; 5-Stator; 6-Mounting bracket; 7-Detection head; 8-Rotor; 9-Motor; 10-Rotating ring; 11-Gear one; 12-Gear two; 13-Locking ring; 14-Locking pin; 15-Spring one; 16-Limiting hole; 17-Wiping head; 18-Wiping plate; 19-Spring two. Detailed Implementation

[0022] refer to Figures 1 to 6 The boiler primary air pulverized coal flow monitoring device shown includes multiple sets of detection heads 7 for detecting the amount of pulverized coal in the conveying pipeline 1. The positions of the multiple sets of detection heads 7 in the conveying pipeline 1 can be adjusted along the axis of the conveying pipeline 1. Changing the position of the multiple sets of detection heads 7 increases the detection points of the detection heads 7, thereby improving the detection accuracy of the amount of pulverized coal in the conveying pipeline 1. After the position of the detection heads 7 is adjusted, the position of the detection heads 7 is locked to avoid changes in position caused by vibration or other forces during the detection process. It can also automatically wipe the detection heads 7 after long-term operation to improve the detection accuracy of the detection heads 7.

[0023] refer to Figure 1 , Figure 2 A motor 9 is installed inside the conveying pipe 1 shown. The power cord of the motor 9 passes through the conveying pipe 1 and is connected to the power source. A gland is installed at the position where the power cord of the motor 9 passes through the conveying pipe 1 to ensure the sealing of the conveying pipe 1. A gear 12 is installed on the output shaft of the motor 9. The gear 12 is rotatably connected to the conveying pipe 1. A rotating ring 10 is rotatably installed inside the conveying pipe 1. A gear 11 is coaxially installed on the rotating ring 10. The gear 11 meshes with the gear 12. When the motor 9 starts, it drives the gear 12 to rotate. The gear 12 drives the gear 11 and the rotating ring 10 to rotate. Two sets of support plates 2 are installed on the rotating ring 10.

[0024] refer to Figure 2 , Figure 4 , Figure 5 The conveying pipe 1 shown also has a mounting frame 6 and a locking ring 13 rotatably mounted inside. Multiple sets of detection heads 7 are mounted on the mounting frame 6, with the detection ends of the detection heads 7 flush with the inner wall of the conveying pipe 1. A stator 5 is also installed inside the conveying pipe 1, with wires 4 mounted on the stator 5. The wires 4 pass through the conveying pipe 1 and are connected to a power source. A gland is installed at the point where the wires 4 pass through the conveying pipe 1. A rotor 8 is rotatably mounted on the stator 5, supplying power to the rotor 8, which in turn supplies power to the multiple sets of detection heads 7. refer to Figure 3 , Figure 4 , Figure 5The locking ring 13 shown has multiple sets of limiting holes 16, and multiple sets of locking pins 14 are slidably arranged inside the conveying pipe 1. A spring 15 is provided between the locking pin 14 and the conveying pipe 1. The locking pin 14 is inserted into the limiting hole 16, and the position where the locking pin 14 and the limiting hole 16 are in contact is set as an inclined surface. When the locking pin 14 is inserted into the limiting hole 16, it fixes the locking ring 13. Since the position where the locking pin 14 and the limiting hole 16 are in contact is an inclined surface, when the locking ring 13 moves... When the limiting hole 16 rotates, it presses the locking pin 14. When the pressure applied by the limiting hole 16 to the locking pin 14 is greater than the supporting force of the spring-15 on the locking pin 14, the spring-15 is pressed by the locking pin 14, and the locking pin 14 is pulled out from the limiting hole 16, releasing the fixation of the locking ring 13. When the locking ring 13 stops rotating, the locking pin 14 is aligned with the limiting hole 16. At this time, the locking pin 14 is inserted into the limiting hole 16 to fix the limiting hole 16.

[0025] The locking ring 13 is provided with two sets of limit blocks 3, the support plate 2 is in contact with the limit blocks 3, and the locking ring 13 is connected to the mounting bracket 6 through the limit blocks 3.

[0026] A wiping plate 18 is slidably disposed inside the support plate 2. A spring 19 is disposed between the wiping plate 18 and the support plate 2. A wiping head 17 is disposed on the wiping plate 18. The wiping head 17 wipes the detection end of the detection head 7 to ensure the cleanliness of the surface of the detection head 7.

[0027] Working principle: During operation, primary air containing pulverized coal is conveyed through conveying pipe 1. The detection head 7 is started to detect the amount of pulverized coal in the primary air. When the position of the detection head 7 needs to be adjusted, the motor 9 is started. The motor 9 drives gear 12 to rotate, which in turn drives gear 11 and rotating ring 10 to rotate. The rotating ring 10 drives two sets of support plates 2 to rotate. When the support plate 2 is in contact with the limiting block 3, the support plate 2 drives the limiting block 3 to rotate. The limiting block 3 drives the locking ring 13, mounting frame 6, and rotor 8 to rotate. At this time, the mounting frame 6 drives the detection head 7 to rotate, completing the adjustment of the position of the detection head 7. When the locking ring 13 stops rotating, the locking pin 14 is inserted into the limiting hole 16 to fix the locking ring 13, preventing the position of the detection head 7 from being affected by vibrations or other movements of the conveying pipe 1.

[0028] When it is necessary to wipe the detection end of the detection head 7, the motor 9 is started. The motor 9 drives the rotating ring 10 to rotate through the gear 2 12 and the gear 11. The rotating ring 10 drives the support plate 2 to rotate in reverse but not to be in contact with the limit block 3. At this time, the support plate 2 drives the wiping head 17 to be in contact with the detection end of the detection head 7 for wiping. When wiping the detection head 7, because the support plate 2 and the limit block 3 are not in contact, the position of the detection head 7 does not change. The wiping plate 18 drives the wiping head 17 to always be in contact with the inner wall of the conveying pipe 1 through the action of the spring 2 19, thereby improving the wiping effect of the wiping head 17 on the detection end of the detection head 7.

Claims

1. A boiler primary air pulverized coal flow monitoring device, comprising a conveying pipeline (1), characterized in that: The conveying pipe (1) is rotatably equipped with a mounting frame (6), a rotor (8) and a rotating ring (10). The mounting frame (6) is equipped with multiple sets of detection heads (7), which are connected to the rotor (8). The conveying pipe (1) is also equipped with a stator (5) and a locking post (14). The stator (5) supplies power to the rotor (8), and the rotor (8) supplies power to the detection heads (7). The rotating ring (10) is equipped with a support plate (2), and the support plate (2) is equipped with a wiping head (17). The wiping head (17) wipes the detection head (7).

2. The boiler primary air pulverized coal flow monitoring device according to claim 1, characterized in that: A locking ring (13) is rotatably installed inside the conveying pipe (1). The locking ring (13) is provided with multiple sets of limiting holes (16). A locking post (14) is slidably installed inside the conveying pipe (1). The locking post (14) is inserted into the limiting hole (16).

3. The boiler primary air pulverized coal flow monitoring device according to claim 2, characterized in that: A spring (15) is provided between the locking pin (14) and the conveying pipe (1).

4. The boiler primary air pulverized coal flow monitoring device according to claim 2, characterized in that: The side of the locking post (14) that is in contact with the limiting hole (16) is set as an inclined surface.

5. The boiler primary air pulverized coal flow monitoring device according to claim 2, characterized in that: The locking ring (13) is provided with a limiting block (3), the limiting block (3) is connected to the mounting bracket (6), and the support plate (2) is in contact with the limiting block (3).

6. The boiler primary air pulverized coal flow monitoring device according to claim 1, characterized in that: A motor (9) is installed inside the conveying pipe (1). A second gear (12) is installed on the output shaft of the motor (9). A first gear (11) is coaxially installed on the rotating ring (10). The second gear (12) meshes with the first gear (11).

7. The boiler primary air pulverized coal flow monitoring device according to claim 6, characterized in that: The stator (5) is provided with a conductor (4), which passes through the conveying pipe (1) and is connected to the power supply.

8. The boiler primary air pulverized coal flow monitoring device according to claim 7, characterized in that: The motor (9) is equipped with a power cord. The power cord of the motor (9) passes through the conveying pipe (1) and is connected to the power source. The power cord and wire (4) on the motor (9) both use glands to pass through the conveying pipe (1).

9. The boiler primary air pulverized coal flow monitoring device according to claim 1, characterized in that: A wiping plate (18) is slidably disposed inside the support plate (2), and the wiping head (17) is mounted on the wiping plate (18).

10. A boiler primary air pulverized coal flow monitoring device according to claim 9, characterized in that: A second spring (19) is provided between the wiping plate (18) and the support plate (2).

Images