Dust detection mechanism for high-temperature flue of thermal power plant
By designing a dust detection mechanism including cylinders, guide cylinders, flange cylinders, push and pull rods, pistons, fixing bolts, light shielding plates and photoelectric switches, the problems of inaccurate and high cost of dust detection in high temperature flue are solved, and low-cost and accurate dust detection and removal are achieved, saving energy.
Patent Information
- Application Number
- CN202421996836.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The existing high-temperature flue dust detection methods in thermal power plants have problems such as inaccurate, frequent misoperation and high cost, resulting in energy waste and increased equipment costs.
The dust detection mechanism consisting of a cylinder, guide cylinder, flange cylinder, push and pull rod, piston, fixing bolt, light shielding plate, photoelectric switch and dust connector are used to detect the amount of dust in the flue in real time through the cooperation of the light shielding plate and photoelectric switch, and control the start and stop of the soot blower.
It realizes low-cost and accurate dust detection, timely outputs control signals, ensuring that the dust in the flue is completely removed and energy saving.
Smart Images
Figure CN223065166U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of high-temperature dust cleaning in the flue of a power plant, and particularly relates to a dust detection mechanism for the high-temperature flue of a thermal power plant. Background Art
[0002] At present, there are three methods for controlling soot blowing in the high-temperature flue of a thermal power plant. The first is timed soot blowing, that is, setting the soot blowing time according to experience. The second control method is to use a level switch to control soot blowing. The third method is to use a radar detection method to control soot blowing.
[0003] All three of these control methods have disadvantages. The first is setting the time for soot blowing based on experience. When setting, for fear of incomplete soot blowing, the set soot blowing time is often too long, wasting energy. If the set soot blowing time is short, the blowing effect does not meet the requirements. The second method is to detect soot blowing with a level switch. The level switches currently produced in China have unsatisfactory detection effects in high-temperature flues, with many false operations. Often, the level switch is buried by dust and cannot send out an alarm signal either. The third method uses radar detection. Since the air inside the flue is turbid and polluted by dust during the operation of the high-temperature flue, the radar wave is often reflected by the dust and cannot accurately output a control signal. Moreover, the radar for high-temperature flues is relatively expensive, increasing the manufacturing cost for producers. Therefore, it is extremely urgent to develop a dust detection mechanism for the high-temperature flue of a power plant that can be accurate and low-cost. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a dust detection mechanism for the high-temperature flue of a thermal power plant, which can accurately detect the dust in the flue.
[0005] The technical solution adopted is as follows:
[0006] A dust detection mechanism for the high-temperature flue of a thermal power plant includes a cylinder, a guide cylinder, a flange cylinder, a push-pull rod, a piston, a fixing bolt, a light-shielding plate, a photoelectric switch, a dust receiving cylinder, and a base.
[0007] At least one fixing bolt is fixed on the push-pull rod. The inner end of the fixing bolt is fixed on the push-pull rod, and the outer end of the fixing bolt is fixed with a light-shielding plate.
[0008] The front end of the push-pull rod is fixed with a piston.
[0009] The dust receiving cylinder is fixed on the base, and the dust receiving cylinder has a dust receiving port.
[0010] The rear end opening of the guide cylinder is fixed on the housing of the cylinder.
[0011] The front end opening of the guide cylinder is fixedly connected to the rear end opening of the flange cylinder.
[0012] The front end of the flange cylinder is fixedly connected to the rear side plate of the base.
[0013] The rear end of the push-pull rod is fixedly connected to the piston rod of the cylinder.
[0014] The rear end of the push-pull rod is located inside the guide cylinder and the flange cylinder.
[0015] The front end of the push-pull rod passes through the rear side plate of the base and enters the dust collection cylinder, and the piston is located inside the dust collection cylinder.
[0016] The guide strip holes are axially formed on the guide cylinder.
[0017] The fixing bolts pass through the guide strip holes, and the light-shielding plate is located outside the guide cylinder.
[0018] The photoelectric switch is arranged on the outer side of the front end of the guide cylinder, and the position of the photoelectric switch corresponds to the position of the light-shielding plate.
[0019] The inner end of the fixing bolt may also have an extended section extending to the other side of the push-pull rod. There are also guide strip holes at the corresponding position of the guide cylinder. The extended section of the fixing bolt extends out of the corresponding guide strip hole. The outer end of the extended section of the fixing bolt is also fixed with a light-shielding plate, and a corresponding photoelectric switch is arranged on the outer side of the front end of the guide cylinder.
[0020] Its advantages are as follows:
[0021] This design is very practical. Compared with a radar that costs tens of thousands of yuan, it only costs a few thousand yuan. It has a low cost, a reasonable structure, flexible movement, accurate detection, can output control signals correctly in time, ensure that the dust in the flue is blown clean, and save energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic structural diagram of the present utility model.
[0023] Figure 2 is Figure 1 the top view of
[0024] Figure 3 is Figure 1 the side view of
[0025] Figure 4 It is a schematic structural diagram of the light-shielding plate.
[0026] Figure 5 It is the front view of the cylinder and the Y-shaped joint.
[0027] Figure 6 is Figure 5 the three-dimensional view of
[0028] Figure 7 is Figure 5 the side view of
[0029] Figure 8 It is a schematic structural diagram of the base.
[0030] Figure 9 It is the front view of the dust collection cylinder.
[0031] Figure 10 It is the top view of the dust collection cylinder.
[0032] Figure 11 It is the side view of the dust collection cylinder.
[0033] Figure 12 It is the front view of the push-pull rod, fixed bolt, light-shielding plate and piston.
[0034] Figure 13 It is Figure 12 the top view of
[0035] Figure 14 It is the structural schematic diagram of a one-cylinder two-cylinder guiding component.
[0036] Figure 15 It is the front view of the photoelectric switch base and the photoelectric switch.
[0037] Figure 16 It is Figure 15 the top view of
[0038] Figure 17 It is Figure 15 the side view of
[0039] Fixed bolt 1, light-shielding plate 2, piston 3, flange cylinder 4, guiding cylinder 5, air cylinder 6, photoelectric switch 7, base 8, dust collection cylinder 9, air inlet pipe 10, push-pull rod 11, photoelectric switch base 12, dust collection port 13, guiding strip hole 14, soot blowing hole 15. Specific implementation mode
[0040] The high-temperature flue dust detection mechanism of a thermal power plant includes an air cylinder 6, a guiding cylinder 5, a flange cylinder 4, a push-pull rod 11, a piston 3, a fixed bolt 1, a light-shielding plate 2, a photoelectric switch 7, a dust collection cylinder 9 and a base 8.
[0041] Two fixed bolts 1 are respectively inserted into two holes at the rear end of the push-pull rod 11 and fixed in the middle. The two ends of the fixed bolt 1 are respectively located on both sides of the push-pull rod 11, and light-shielding plates 2 are respectively fixed.
[0042] The fixed bolt 1 is vertically arranged with the push-pull rod 11.
[0043] The light-shielding plate 2 is an L-shaped plate. Two holes on one side plate of the light-shielding plate 2 are sleeved on two fixed bolts 1 on the same side and tightened with nuts.
[0044] The front end of the push-pull rod 11 is fixed with a cylindrical piston 3, and the piston hole of the piston 3 is installed at the front end of the push-pull rod 11.
[0045] The dust collection cylinder 9 is welded and fixed to the upper part of the base 8. There is a dust collection port 13 on the side of the dust collection cylinder 9. The front side of the dust collection cylinder 9 is closed, and the internal space is cylindrical, with a shape corresponding to that of the piston 3.
[0046] The push rod 11, the fixing bolt 1, the light shielding plate 2 and the piston 3 form a guiding piston assembly.
[0047] The rear end opening of the guiding cylinder 5 is fixedly connected to the Y-shaped joint on the housing of the air cylinder 6.
[0048] The front end opening of the guiding cylinder 5 is fixedly connected to the rear end opening of the flange cylinder 4.
[0049] The front end opening of the flange cylinder 4 is fixedly connected to the rear side plate of the base 8.
[0050] The guiding cylinder 5, the flange cylinder 4 and the air cylinder 6 form a one-cylinder two-cylinder assembly.
[0051] The rear end head of the push rod 11 is fixedly connected to the piston rod of the air cylinder 6.
[0052] The rear end of the push rod 11 is located inside the guiding cylinder 5 and the flange cylinder 4.
[0053] The front end of the push rod 11 passes through the rear side plate of the base 8 and enters the dust collection cylinder 9, and the piston 3 is located inside the dust collection cylinder 9.
[0054] Guiding slots 14 are respectively provided on two opposite sides of the guiding cylinder 5.
[0055] The two sides of the fixing bolt 1 axially pass through the guiding slots 14 respectively, and the light shielding plate 2 is located outside the guiding cylinder 5.
[0056] Photoelectric switches 7 are respectively arranged on the two outer sides of the front end of the guiding cylinder 5 through the photoelectric switch seats 12, and the positions correspond to the positions of the two light shielding plates 2.
[0057] The guiding cylinder 5, the flange cylinder 4, the air cylinder 6, the push rod 11 and the fixing bolt 1 form a one-cylinder two-cylinder guiding assembly.
[0058] A soot blowing hole 15 is provided on the side of the dust collection cylinder 9, and the soot blowing hole 15 is connected to the air inlet pipe 10.
[0059] The other end of the air inlet pipe 10 is used to connect to the outlet of the air pump.
[0060] Working principle:
[0061] The base 8 and the dust collection cylinder 9 are located inside the flue. If there is ash, it will enter the dust collection cylinder 9 from the dust collection port 13. The air cylinder 6, the guiding cylinder 5, the flange cylinder 4, the light shielding plate 2 and the photoelectric switch 7 are located outside the flue.
[0062] The piston rod of the air cylinder 6 can be pushed and pulled back and forth, and the push rod 11 and the piston 3 move back and forth along the guiding slots 14.
[0063] When dust detection is required, the piston rod of the cylinder 6 extends outwards, driving the push-pull rod 11, the fixing bolt 1, the light-shielding plate 2 and the piston 3 to move forward. If there is little dust in the dust collection cylinder 9, the piston 3 can be pushed into the dust collection cylinder 9, the light-shielding plate 2 is inserted into the groove of the photoelectric switch 7, and the photoelectric switch outputs a signal without dust blowing.
[0064] If there is dust in the dust collection cylinder 9, the piston 3 cannot or can hardly be pushed into the dust collection cylinder 9, the forward movement distance of the light-shielding plate 2 is limited and it cannot be inserted into the groove of the photoelectric switch. At this time, the photoelectric switch 7 does not output a signal and the dust blower starts to blow dust.
[0065] After each dust blowing is completed, the air inlet pipe 10 intakes air to blow the dust in the dust collection cylinder 9 clean and waits for the next detection.
[0066] In this embodiment, two light-shielding plates 2 and photoelectric switches 7 are provided. It is also possible to use half of the length of the fixing bolt 1 on one side of the push-pull rod 11, one light-shielding plate 2 and one photoelectric switch 7. Different positions of the photoelectric switch 7 can also be set to adjust the sensitivity of the device.
Claims
1. High-temperature flue dust detection mechanism for thermal power plants, comprising a cylinder (6), a guide cylinder (5), a flange cylinder (4), a push-pull rod (11), a piston (3), a fixing bolt (1), a light-shielding plate (2), a photoelectric switch (7), a dust collection cylinder (9) and a base (8); characterized in that: At least one fixing bolt (1) is fixed on the push-pull rod (11), the inner end of the fixing bolt (1) is fixed on the push-pull rod (11), and the outer end of the fixing bolt (1) is fixed with a light-shielding plate (2); The front end of the push-pull rod (11) is fixed with a piston (3); The dust collection cylinder (9) is fixed on the base (8), and the dust collection cylinder (9) has a dust collection port (13); The rear end opening of the guide cylinder (5) is fixed on the housing of the cylinder (6); The front end opening of the guide cylinder (5) is fixedly connected to the rear end opening of the flange cylinder (4); The front end of the flange cylinder (4) is fixedly connected to the rear side plate of the base (8); The rear end of the push-pull rod (11) is fixedly connected to the piston rod of the cylinder (6); The rear end of the push-pull rod (11) is located inside the guide cylinder (5) and the flange cylinder (4); The front end of the push-pull rod (11) passes through the rear side plate of the base (8) and enters the dust collection cylinder (9), and the piston (3) is located inside the dust collection cylinder (9); A guide slot hole (14) is axially formed on the guide cylinder (5); The fixing bolt (1) passes through the guide slot hole (14), and the light-shielding plate (2) is located outside the guide cylinder (5); A photoelectric switch (7) is arranged on the outer side of the front end of the guide cylinder (5), and the position of the photoelectric switch (7) corresponds to the position of the light-shielding plate (2).
2. The high-temperature flue dust detection mechanism for thermal power plants according to claim 1, characterized in that: The dust collection cylinder (9) is further provided with a soot blowing hole (15), and one end of the soot blowing hole (15) is connected to one end of an air inlet pipe (10); the other end of the air inlet pipe (10) is used for connecting to the outlet of an air pump.
3. The high-temperature flue dust detection mechanism for thermal power plants according to claim 1, characterized in that: The fixing bolt (1) is perpendicular to the push-pull rod (11).
4. The high-temperature flue dust detection mechanism for thermal power plants according to claim 1, characterized in that: The piston (3) is cylindrical; the internal space of the dust collection cylinder (9) is also cylindrical.
5. The high-temperature flue dust detection mechanism for thermal power plants according to claim 1, characterized in that: The inner end of the fixing bolt (1) has an extended section extending to the other side of the push-pull rod (11), and there is also a guide slot hole (14) at the corresponding position of the guide cylinder (5). The extended section of the fixing bolt (1) extends out of the corresponding guide slot hole (14), and the outer end of the extended section of the fixing bolt (1) is also fixed with a light-shielding plate (2), and a corresponding photoelectric switch (7) is arranged on the outer side of the front end of the guide cylinder (5).