Intelligent air pre-heater air leakage control device based on high-precision laser ranging
By monitoring the position of the air preheater rotor and sector plate using high-precision laser ranging and potentiometers, and adjusting the seal using a screw jack, the problem of air preheater leakage changing with operating conditions was solved, achieving high-precision and rapid leakage control.
Patent Information
- Application Number
- CN202520811041.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-27
AI Technical Summary
The sealing device of traditional air preheaters cannot adapt to the dynamic thermal deformation of the rotor, resulting in a significant increase in air leakage as the operating conditions change. The existing control system has insufficient accuracy and slow response, and poor fault tolerance.
High-precision laser ranging technology combined with a potentiometer is used to monitor the position of the air preheater rotor and the sector plate in real time. The position of the sector plate is adjusted by a screw jack, and the laser sensor is protected by a limit sleeve and a sealing cylinder to achieve dynamic sealing adjustment.
It enables real-time monitoring and dynamic sealing adjustment of rotor thermal deformation, reduces air leakage, improves control accuracy and response speed, and enhances the system's fault tolerance.
Smart Images
Figure CN223896011U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an intelligent air preheater air leakage control device based on high-precision laser ranging. BACKGROUND
[0002] The air preheater is prone to cause the sealing gap to increase due to the thermal deformation of the rotor in the boiler operation, thereby causing direct air leakage. The traditional sealing device relies on static design or manual adjustment, and cannot adapt to the dynamic thermal deformation of the rotor, thereby causing the air leakage to increase significantly with the working condition. In the prior art, part of the system adopts mechanical feedback or single sensor control, but has problems of insufficient precision, response lag and poor fault tolerance. Therefore, an efficient air leakage control system capable of monitoring the deformation of the rotor and the position of the sector plate in real time is urgently needed. SUMMARY
[0003] The utility model discloses in order to solve the above-mentioned technical problem, provide a kind of intelligent air preheater air leakage control device based on high-precision laser ranging.
[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0005] An intelligent air preheater air leakage control device based on high-precision laser ranging, which comprises: an air preheater body, a sector plate and an air preheater rotor, a spiral screw elevator is fixed on the air preheater body, a potentiometer is fixed on the top of the screw rod of the spiral screw elevator, a limiting sleeve is fixed on the lifting screw rod of the spiral screw elevator, and a support frame is fixed on the air preheater body.
[0006] The supporting steel on the air preheater body is fixed with a sealing cylinder, and a laser sensor is fixed on the top of the sealing cylinder.
[0007] The intelligent air preheater air leakage control device based on high-precision laser ranging has a hollow cylindrical cylinder, a valve is fixed on the cylinder, and an anti-wear protective sleeve is welded on the bottom of the cylinder.
[0008] The intelligent air preheater air leakage control device based on high-precision laser ranging has a 316L stainless steel sleeve. Advantages
[0009] 1. The utility model discloses a fixed potentiometer and laser sensor, which can determine the position of the air preheater rotor and the position of the sector plate, and can monitor the gap between the two in real time, so that the position of the sector plate can be adjusted in time according to the gap.
[0010] 2. The utility model discloses a support frame and a limiting sleeve, which can limit the position of the sector plate, so that the position of the sector plate is within the set range.
[0011] 3. The utility model discloses a sealing cylinder is provided, and laser sensor irradiates in the sealing cylinder air preheater rotor, provides a dustproof passage for laser sensor, prevents the measurement of laser sensor distance from influencing. BRIEF DESCRIPTION OF DRAWINGS
[0012] Fig. 1 It is the front view of the utility model;
[0013] Fig. 2 It is the side view of the utility model;
[0014] In the drawing: 1, air helical screw rod elevator;2, air preheater body;3, potentiometer;4, support frame;5, limit sleeve;6, lifting screw rod;7, sector plate;8, laser sensor;9, air preheater rotor;10, valve;11, cylinder;12, support steel;13, anti-abrasion protective sleeve. DETAILED DESCRIPTION
[0015] Referring to Figs. 1-2 A kind of intelligent air preheater air leakage control device based on high-precision laser ranging, its composition includes: air preheater body 2, sector plate 7 and air preheater rotor 9, the helical screw rod elevator 1 of air preheater body is fixed, the lifting screw rod bottom of helical screw rod elevator is fixed with sector plate, helical screw rod elevator is the commonly used mechanism for driving sector plate movement, by helical screw rod elevator drives sector plate to move up and down, the top of the screw rod of helical screw rod elevator is fixed with potentiometer 3, the lifting screw rod 6 of helical screw rod elevator is fixed with limit sleeve 5, the air preheater body is fixed with support frame 4, by setting support frame and limit sleeve, for the up and down position of sector plate can move limit, prevent excessive movement, support frame is not limited to the movement when adjusting the gap of sector plate, since the amount of deformation that air preheater rotor thermal deformation can be deformed is certain, therefore the setting of support frame can limit the maximum position of sector plate descending and ascending to protect, to guarantee the safety of air preheater;
[0016] When cold, sector plate is adjusted to horizontal zero value, the gap between sector plate and radial seal piece is 2-4mm at this time, laser sensor to rotor plane distance H1 at this time is collected as zero reference value simultaneously;When preheater hot state runs, rotor is deformed downward by heat, laser sensor to rotor angle steel plane distance H2 is measured at this time;The difference between cold and hot state laser ranging value is rotor actual deformation amount ΔH=H2-H1 。Meanwhile, the absolute displacement value H0 of sector plate is fed back through potentiometer device.The difference between rotor deformation amount ΔH and sector plate displacement value H0 is the gap between sector plate and rotor radial seal piece.Compared with the calculated gap value and set gap value, when greater than set value, adjust sector plate downward through helical screw rod elevator, less than set value, adjust sector plate upward through helical screw rod elevator, always keep sector plate and radial seal piece in set optimal gap value.
[0017] The support steel 12 on the air preheater body is fixed with the sealing cylinder, and the top of the sealing cylinder is fixed with the laser sensor 8. The sealing cylinder is a hollow cylindrical cylinder 11, and the valve 10 is fixed on the cylinder. The bottom of the cylinder is welded with the wear-resistant protective sleeve 13. The wear-resistant protective sleeve is a 316L stainless steel sleeve. By arranging the sealing cylinder, the laser sensor irradiates the air preheater rotor in the sealing cylinder, provides a dustproof channel for the laser sensor, prevents the measurement of the distance of the laser sensor from being affected, and simultaneously installs the valve on the cylinder. When the laser sensor is used, the valve is opened, which can be used for measuring the distance, and when it is not used, the valve can be closed to protect the laser sensor.
Claims
1. A smart air preheater leakage control device based on high-precision laser ranging, comprising: An air preheater body, a sector plate and an air preheater rotor, wherein a screw jack is fixed on the air preheater body, characterized in that: a potentiometer is fixed on the top of the screw of the screw jack, a limit sleeve is fixed on the lifting screw of the screw jack, and a support frame is fixed on the air preheater body. The supporting steel on the air preheater body is fixed to the sealing cylinder, and a laser sensor is fixed to the top of the sealing cylinder.
2. The intelligent air preheater leakage control device based on high-precision laser ranging according to claim 1, characterized in that: The sealing cylinder is a hollow cylindrical body with a valve fixed on it, and an anti-wear protective sleeve is welded to the bottom of the cylinder.
3. The intelligent air preheater leakage control device based on high-precision laser ranging according to claim 2, characterized in that: The wear-resistant protective sleeve is made of 316L stainless steel.