CN2311761Y

CN2311761Y - Oil level monitor

Info

Publication number: CN2311761Y
Application number: CN 97249711
Authority: CN
Inventors: 吴励鸣
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-11-26
Filing date: 1997-11-26
Publication date: 1999-03-24
Anticipated expiration: 2007-11-26

Abstract

The utility model relates to an oil level monitor, composed of a constant torsion portion, a light hole disk, a photoelectric coupler, a float and a digital circuit, wherein, the constant torsion portion comprises a torsion spring, a reel, wire cables, a float, two position switches D1 and D2, a DC speed regulation self-locking motor, a compression rod, three guide rings and three carbon brushes. The position switch provides a positive or a negative signal which reflects a direction for the digital circuit. The photoelectric coupler provides count signals for the digital circuit to comprehensively reflect oil level changing. The utility model has the advantages of wide work temperature range, strong interference resistance, remote monitoring of an oil level, good reliability and high precision. The utility model can be suitable for monitoring the oil level of an oil conservator in high electromagnetic field and high temperature difference environment.

Description

Oil level monitor

The utility model relates to a kind of oil level monitoring instrument.Especially relate to a kind of high-strength magnetic that can resist and disturb, be not subjected to the oil level monitoring instrument of temperature difference influence.

In the generating plant, the oil level of turbine oil oil conservater oil level and transformer oil conservater all is power plant's important step of monitoring automatically, but the environment at these oil conservater places is very abominable.Big especially as electromagnetic interference (EMI), about 80 ℃ of oily Wen Gaoda, in the time of in the winter time, the oil temperature is low to about-40 ℃.In this case, some liquid level sensor and instrument measurement miss by a mile, even cisco unity malfunction.Spatter quantity sensor as pressure-sensitive liquid level sensor, supersonic liquid level and all be difficult to operate as normal.Current, some power plant adopts machinery instrument monitoring oil level, but these Oil Tanks are all up to several meters, staff's reading is extremely inconvenient, and error is very big, the expansion link of these instrument or float loop bar get rusty easily or block, again can not remote transmission signal, can't satisfy present power plant carries out remote monitoring to the oil conservater oil level modernized needs at all.

The purpose of this utility model is to provide a kind of high-strength magnetic that can resist to disturb, and the work temperate zone is wide, can realize dynamic monitoring, the digital demonstration, and can realize the Oil level monitor of 4-20MA simulating signal long-distance transmissions.

The Oil level monitor that the utility model provides is made up of permanent torque system, DC speed regulation self-locking motor, unthreaded hole dish, photoelectrical coupler, float and digital circuit.

Oil level monitor described in the utility model is made up of permanent moment of torsion part, unthreaded hole dish, photoelectrical coupler, float and digital circuit; Inner bearing (35), intermediate bearing interstage sleeve (33) and the outer bearing (34) of described permanent moment of torsion part, be fixed in main shaft (6) left end shaft shoulder place successively, outer bearing interstage sleeve (27) is positioned at outer bearing (34) right side, and holds out against outer bearing (34), and outer bearing interstage sleeve (27) fixes with main shaft (6); Interior cover dead ring (13) is fixed on reel (14) left side, the reverse conducting ring of K2 (12), middle dead ring (11), the public conducting ring of K0 (10), external insulation ring (9) and K1 forward conduction ring (8) are enclosed within on reel (14) the left end skeleton successively, and external insulation sleeve (7) is inserted between it; External insulation sleeve (7) is a wringing fit with conducting ring, dead ring internal diameter, reel (14) left end skeleton external diameter; Described reel (14) is enclosed within on inner bearing (36), intermediate bearing interstage sleeve (33), the outer bearing (34); Travel switch D1 (39), D2 (42) are positioned at reel (14) left end skeleton inboard, torque spring (31) is enclosed within on the main shaft (6) by main shaft (6) left end, the short end of torque spring (31) is fixed on short the end in the fixed orifice (37) of torque spring on the main shaft (6), depression bar (32) is fixed in main shaft (6) the left end hole, and depression bar (32) is between travel switch D1 pressing plate (40), travel switch D2 and the pressing plate (41); K1, the K0 of travel switch D1 (39) joins with K1 forward conduction ring (8), the public conducting ring of K0 (10) respectively; K2, the K0 of travel switch D2 (42) joins with the reverse conducting ring of K2 (12), the public conducting ring of K0 (10) respectively; Described unthreaded hole dish (17) is positioned on the bearing (6) between right-hand member bearing box (18) and the outer bearing interstage sleeve (27), and interlock with it, described main shaft (6) two ends are separately fixed in left end bearing (5) and the right-hand member bearing (19), and left end bearing (5) is fixed on the base plate (1) by left end bearing box (4) and left end end bearing fixed support (3); Right-hand member bearing (19) is fixed on the base plate (1) by right-hand member bearing box (18) and right-hand member bearing fixing support (23); Axle insertion main shaft (6) right-hand member axle connecting hole (22) internal fixation of described dc speed-regulating motor (21), DC speed regulation self-locking motor (21) is fixed on the right-hand member bearing box (18) by motor fixing frame (20); Photoelectrical coupler (24) is fixed on the following base plate (1) of unthreaded hole dish (17); The distance that K1 forward carbon brush (30), the public carbon brush of K0 (29), the reverse carbon brush of K2 (28) is connect K1 forward conduction ring (8), the public conducting ring of K0 (10), the reverse conducting ring of K2 (12) is fixed on the insulation brush holder fixed head (2) successively, and the brush holder fixed head (2) that will insulate again is fixed on the base plate (1); Wire rope (15) one ends are fixed on the reel (14) by wire rope standing screw (16), and wire rope (15) is gone up a few by being entangled in reel (14) counterclockwise, and the hole of passing on the base plate (1) is connected with floating (26); The long end of described torque spring (31) clockwise rotates and is fixed in a week in the torque spring long end fixed orifice (36); Adjust float (26) counterweight, depression bar (32) is on 0 position.

Oil level monitor described in the utility model reasonable in design, simple and compact for structure easy for installation, volume is little, anti-various jamming performances are strong, but the remote monitoring oil level, good reliability, precision height, through on-the-spot test, meet power plant's field requirement and national relevant technologies standard fully.

Fig. 1 is the structural representation of Oil level monitor provided by the utility model.

Fig. 2 is the permanent torque structure figure of Oil level monitor provided by the utility model.

Fig. 3 is that the A-A of Oil level monitor provided by the utility model is to cut-open view.

Fig. 4 is that the B-B of Oil level monitor provided by the utility model is to cut-open view.

The embodiment of Oil level monitor provided by the utility model sees accompanying drawing:

：1．2．3．4．5．6．7．8．K19．10．K011．12．K213．14．15．16．17．18．19．20．21．22．23．24．25．26．27、28、K229．K030．K131．32．33．34．35．36．37．38．K139．D1 40．D141．D242．D2 43．K244．。

Its principle of work: at first, adjust the counterweight of float, reel rotates counterclockwise, and shows as (Fig. 3).Allow depression bar be in the position of two travel switches of D1, D2 middle 0.At this moment, the buoyancy Fd of float gravity W and float and torque spring restoring force FT reach balance, that is: W=Fd+FT.

When oil level descended, buoyancy Fd reduced, and balance is broken, and reel begins to rotate counterclockwise, and because of the motor self-locking, so main shaft is motionless, thereby depression bar is motionless.When oil level drops to certain position, depression bar is pushed down travel switch D2 pressing plate, connect K2, K0, the motor instantaneous time is rotated counterclockwise, drive main shaft and rotate, main shaft drives depression bar and rotates, at this moment, depression bar has left the pressing plate of travel switch D2, so K1, K0 disconnect again, forms new dynamic balance state again.The K2 of travel switch D2, K0 whenever close once, be the digital circuit computing negative signal is provided; When oil level continuation decline, motor is rotated further, and motor rotates and just drives the rotation of unthreaded hole dish, unthreaded hole just passes through photoelectrical coupler, photoelectrical coupler just provides count signal for the digital circuit computing, and the negative signal of this signal and front combines, and digital circuit begins to carry out subtraction.

When oil level rose, float face buoyancy Fd increased, and balance is broken, and reel begins to clockwise rotate, and depression bar is motionless.When oil level rises to certain position, the restoring force FT of depression bar torque spring presses the pressing plate of travel switch D1, connect K1, K0, motor is clockwise rotated, motor rotates the rotation that drives main shaft, main shaft rotates is with depression bar to clockwise rotate again, from and opened K1, K0, form new dynamic balance again.The K1 of travel switch D1, K0 close once, be digital circuit a positive signal is provided; Rise when the oil level continuation, motor is rotated further, and drives main shaft and rotates, the unthreaded hole dish also rotates, and just by photoelectrical coupler, photoelectrical coupler just provides count signal for digital circuit to unthreaded hole, the positive signal of this count signal and front combines, and digital circuit begins to carry out additive operation.

The variation up and down of oil level is broken permanent torque system dynamic balance, make motor positive and inverse moving with oil level servo-actuated up and down, the count pulse that will have directivity is again delivered to and is carried out signed magnitude arithmetic(al) in the digital circuit.Because travel switch, to turn round and add spring, motor and photoelectrical coupler work temperate zone are wide, and interference free performance is very strong, thereby reaches at high electromagnetic field, the purpose of monitoring oil level in the big environment of the temperature difference.

Claims

A kind of Oil level monitor is characterized in that: it is made up of permanent moment of torsion part, unthreaded hole dish, photoelectrical coupler, float and digital circuit; Inner bearing (35), intermediate bearing interstage sleeve (33) and the outer bearing (34) of described permanent moment of torsion part, be fixed in main shaft (6) left end shaft shoulder place successively, outer bearing interstage sleeve (27) is positioned at outer bearing (34) right side, and holds out against outer bearing (34), and outer bearing interstage sleeve (27) fixes with main shaft (6); Interior cover dead ring (13) is fixed on reel (14) left side, the reverse conducting ring of K2 (12), middle dead ring (11), the public conducting ring of K0 (10), external insulation ring (9) and K1 forward conduction ring (8) are enclosed within on reel (14) the left end skeleton successively, and external insulation sleeve (7) is inserted between it; External insulation sleeve (7) is a wringing fit with conducting ring, dead ring internal diameter, reel (14) left end skeleton external diameter; Described reel (14) is enclosed within on inner bearing (35), intermediate bearing interstage sleeve (33), the outer bearing (34); Travel switch D1 (39), D2 (42) are positioned at reel (14) left end skeleton inboard, torque spring (31) is enclosed within on the main shaft (6) by main shaft (6) left end, the short end of torque spring (31) is fixed on short the end in the fixed orifice (37) of torque spring on the main shaft (6), depression bar (32) is fixed in main shaft (6) the left end hole, and depression bar (32) is between travel switch D1 pressing plate (40), travel switch D2 and the pressing plate (41); K1, the K0 of travel switch D1 (39) joins with K1 forward conduction ring (8), the public conducting ring of K0 (10) respectively; K2, the K0 of travel switch D2 (42) joins with the reverse conducting ring of K2 (12), the public conducting ring of K0 (10) respectively; Described unthreaded hole dish (17) is positioned on the bearing (6) between right-hand member bearing box (18) and the outer bearing interstage sleeve (27), and interlock with it, described main shaft (6) two quiet being separately fixed in left end bearing (5) and the right-hand member bearing (19), left end bearing (5) is fixed on the base plate (1) by left end bearing box (4) and left end end bearing fixed support (3); Right-hand member bearing (19) is fixed on the base plate (1) by right wax bearing box (18) and right-hand member bearing fixing support (23); Axle insertion main shaft (6) right-hand member axle connecting hole (22) internal fixation of described dc speed-regulating motor (21), DC speed regulation self-locking motor (21) is fixed on the right-hand member bearing box (18) by motor fixing frame (20); Photoelectrical coupler (24) is fixed on the following base plate (1) of unthreaded hole dish (17); The distance that K1 forward carbon brush (30), the public carbon brush of K0 (29), the reverse carbon brush of K2 (28) is connect K1 forward conduction ring (8), the public conducting ring of K0 (10), the reverse conducting ring of K2 (12) is fixed on the insulation brush holder fixed head (2) successively, and the brush holder fixed head (2) that will insulate again is fixed on the base plate (1); Wire rope (15) one ends are fixed on the reel (14) by wire rope standing screw (16), and wire rope (15) is gone up a few by being entangled in reel (14) counterclockwise, and the hole of passing on the base plate (1) is connected with floating (26); The long end of described torque spring (31) clockwise rotates and is fixed in a week in the torque spring long end fixed orifice (36); Adjust float (26) counterweight, depression bar (32) is on 0 position.