CN1171079C

CN1171079C - In-line measurer of powder level in coal powder banker of coal-fired boiler

Info

Publication number: CN1171079C
Application number: CNB991145674A
Authority: CN
Inventors: 包金明; 叶炳生; 戴高楠
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 1999-11-24
Filing date: 1999-11-24
Publication date: 2004-10-13
Anticipated expiration: 2019-11-24
Also published as: CN1257994A

Abstract

The present invention relates to an on-line measuring device of the powder level in a coal powder bunker of a coal-fired boiler, which is a real time measuring device of the powder level in the coal powder bunker of the coal-fired boiler for a heat engine plant. The device is mainly composed of a monitor, a steel wire rope winding device, a weight, a steel wire rope, a pulley and a counter, wherein the monitor and the steel wire rope winding device are arranged on the ground. The weight for measuring the powder level is arranged in the coal powder bunker at the top part of the boiler. One end of the steel wire rope is connected with the weight, and the other end of the steel wire rope is connected with the steel wire rope winding device. The device can be operated and controlled by people on ground so that the present invention can save labor and time. Moreover, the device has the advantages of good safety and long service life.

Description

In-line measurer of powder level in coal powder banker of coal-fired boiler

Technical field

The present invention is a kind of measurement that is used for large-scale coal furnace furnace roof powder level in coal powder banker, in particular for its on-line measurement.

Background technology

The measurement of the powder level in coal powder banker of storage formula coal-burning boiler in the thermal power plant at present, since in the powder storehouse temperature height, dust wave, inclement condition, requirement of explosion proof height, though there is multiple measurement electronic device to occur, as laser measurement, ultrasonic measurement, sonar, capacitance measurement etc., but all badly can not use lastingly, thereby be a problem that does not have thorough solution all the time owing to environment for use.Most enterprises still rest on manpower and shake powder and float and survey the powder position stage, this lift heavy hammer that manually shakes, with the experience impression of gravity with the people, it is bigger that the effect of its measurement is influenced by human factor, adds every 30 minutes once handly, and labour intensity is big, the effort of taking a lot of work, and the field maintemance amount is also big, adds and has only with regard to earth signal indication, can not adapt to the requirement of integrated automatic control.

Summary of the invention

Technical matters: order of the present invention ground just provide a kind of simple in structure, reliable measurements in time, accurately, maintenance workload is little, labour intensity is low in-line measurer of powder level in coal powder banker of coal-fired boiler.

Technical scheme: in-line measurer of powder level in coal powder banker of coal-fired boiler of the present invention is made up of watch-dog, wire rope scrolling device, weight, wire rope, fixed pulley, counter, watch-dog and wire rope scrolling device are placed ground, the weight of measuring the powder position places in the Pulverized Coal Bin at boiler top, one of wire rope connects weight, and the other end connects wire rope scrolling device; Wire rope scrolling device is made up of travelling block, carriage, guide rail, stop, frame, reel, stage clip, both sides in frame are respectively equipped with vertical channel, the two ends of carriage are passed vertical channel and are separately fixed on the stage clip, the other end of stage clip is fixed on the base plate of frame, the travelling block center pit is enclosed within on the carriage and is positioned at the inboard of frame, counter is located on the frame, and reel is positioned at the bottom of frame.Described counter is made up of pulley, signal panels, sensor, magnetic signal generator, travelling block and signal panels are fixed in the same rotating shaft, travelling block is positioned at the inboard of frame, signal panels are positioned at the outside of frame, be provided with a circle magnetic signal generator on the circumferential side wall of signal panels, sensor is positioned at the outside of magnetic signal generator.Described stop is located at a side of carriage, and this stop is made of Hall element.

During measurement, sending signal by controller earlier rotates motor, wire rope is emitted in the reel reversing, will move upward along the vertical channel on the frame at the travelling block on the carriage, the vertical hammer of the measurement of wire rope other end simultaneously drives wire rope and extracts out outside this device, when measuring weight and fall on the coal dust of Pulverized Coal Bin, weight no longer falls, therefore travelling block is not owing to there is downward pressure, will be by the retroaction of stage clip with the top of travelling block holder to vertical channel, send signal by stop this moment, and the motor drives reel just changes, travelling block is depressed downwards again, will be measured weight simultaneously and mention.In the overall process of this action, the motion of wire rope all drives the rotation of counter, so counter records played the walking length of steel wire, thereby measures the position in storehouse height.

Beneficial effect: the invention has the advantages that and use this measurement device powder storehouse material level, not only speed is fast, the more important thing is save time, laborsaving, long service life, and security performance is good, the user just stand on the ground can operational measure overall process, and this device can fix on the ground, therefore safeguards, maintenance is also very convenient.This apparatus structure is simple in addition, the reliable apparatus cost is low.

Description of drawings

Fig. 1 is a general structure synoptic diagram of the present invention.Watch-dog 1, wire rope scrolling device 2, weight 3, wire rope 4, fixed pulley 5, counter 6, Pulverized Coal Bin 7 are wherein arranged.

Fig. 2 is the structural representation of wire rope scrolling device 2 of the present invention.Travelling block 21, carriage 22, guide rail 23, stop 24, frame 25, reel 26, stage clip 27, vertical channel 251, base plate 252, signal panels 61, magnetic signal generator 611 are wherein arranged.

Fig. 3 is that Fig. 2 A A is to the sectional structure synoptic diagram.Signal panels 61, sensor 62 are wherein arranged.

Fig. 4 is that Fig. 2 B-B is to the sectional structure synoptic diagram.

Embodiment

Embodiment of the present invention are as follows:

The present invention mainly is made up of watch-dog 1, wire rope scrolling device 2, weight 3, wire rope 4, fixed pulley 5, counter 6, and watch-dog and wire rope scrolling device are placed ground, and the weight of measuring the powder position places

In the Pulverized Coal Bin at boiler top, one of wire rope connects weight, and the other end connects wire rope scrolling device, has so just constituted overall plan of the present invention.Wherein wire rope scrolling device 2 is composed as follows:

Frame 25 is that two blocks of same big steel plates are made, on this two block plate, have a vertical channel 251, travelling block 21 is installed on the carriage 22 and can has freely on carriage 22 and rotates, travelling block 21 is between two block plates, stretch out outside the frame by the vertical channel on the frame respectively at the two ends of carriage 22, the two ends of carriage fix with an end of stage clip 27 respectively outside frame, the other end of stage clip is fixed on the base plate 252 of frame, in addition, on carriage 22, also be provided with stop 24, this stop is made of Hall element, on frame, also be provided with counter 6, counter is by travelling block 21, signal panels 61, sensor 62 constitutes, travelling block 21 and signal panels 61 are fixed in the same rotating shaft, when travelling block rotates, can drive signal panels rotates synchronously, pulley is between two block plates of frame, signal panels are positioned at the outer side of frame, on the circumferential side wall of signal panels 61, be provided with a circle magnetic signal generator 611, outside the magnetic signal generator of signal panels, be provided with Hall element, when travelling block rotates, signal panels also rotate synchronously, thereby the magnetic signal generator on signal panels will constantly trigger hall sensing, reaches the purpose of the powder position height that calculates coal-burning boiler powder storehouse with the number of turns of recording counter.Reel 26 is positioned at the bottom of frame.Just can be made into the present invention according to the above.

Claims

1, a kind of in-line measurer of powder level in coal powder banker of coal-fired boiler, formed by weight, rolling device, controller, it is characterized in that this device is made up of watch-dog (1), wire rope scrolling device (2), weight (3), wire rope (4), fixed pulley (5), counter (6), watch-dog (1) and wire rope scrolling device (2) are placed ground, the weight (3) of measuring the powder position places in the Pulverized Coal Bin (7) at boiler top, one of wire rope (5) connects weight (3), and the other end connects wire rope scrolling device (2); Wire rope scrolling device (2) is by travelling block (21), carriage (22), guide rail (23), stop (24), frame (25), reel (26), stage clip (27) is formed, be respectively equipped with vertical channel (251) in the both sides of frame (25), the two ends of carriage (22) are passed vertical channel (251) and are separately fixed on the stage clip (27), the other end of stage clip (27) is fixed on the base plate (252) of frame (25), travelling block (21) center pit is enclosed within the inboard that frame (25) were gone up and be positioned to carriage (22), counter (6) is located on the frame (25), and reel/(20) are positioned at the bottom of frame (25).

2, in-line measurer of powder level in coal powder banker of coal-fired boiler according to claim 1, it is characterized in that described counter (6) is made up of signal panels (61), sensor (62), magnetic signal generator (611), travelling block (21) is fixed in the same rotating shaft with signal panels (61), travelling block (■) is positioned at the inboard of frame, signal panels (61) are positioned at the outside of frame, be provided with a circle magnetic signal on the circumferential side wall of signal panels (61) (611) take place, sensor (62) is positioned at the outside of magnetic signal generator (611).

3, in-line measurer of powder level in coal powder banker of coal-fired boiler according to claim 1 and 2 it is characterized in that described stop (24) is located at a side of carriage (22), and this stop (24) is made of Hall element.