CN2323362Y

CN2323362Y - Transformer conservator level monitor

Info

Publication number: CN2323362Y
Application number: CN 97214340
Authority: CN
Inventors: 吴雳鸣
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-30
Filing date: 1997-04-30
Publication date: 1999-06-09
Anticipated expiration: 2007-04-30

Abstract

The utility model relates to an oil conservator liquid level monitor for transformers, which is characterized in that a first grade monitoring system for oil level is composed of two gear discs of a same main shaft and two switches, a second grade monitoring system for oil level is composed of a driving wheel which is connected with the main shaft, a driven wheel which is parallel with the driving wheel, an elastic light steel band, an infrared transmitting tube and an infrared receiving tube, the elastic light steel band is rolled on the driving wheel, wound round the driven wheel, penetrated through a bottom plate, and connected with an isolating rubber plate of liquid level oil conservator, a third grade monitoring system for oil level is composed of a bidirectional gear and a microswitch, an alarm system is arranged on the tail part of the main shaft, and a clockwork spring of a constant force spring is arranged on the front end of the main shaft. The device has the advantages of reasonable design, simple structure, strong resistant performance for various interference and precise monitoring.

Description

Transformer conservator liquid level monitoring device

The utility model relates to a kind of three grades of transformer conservator liquid level monitoring devices that anti-high-strength magnetic that large-scale waterpower and fuel-burning power plant main-transformer conservator liquid level monitoring use disturbs that are applied to.

In big-and-middle-sized generating plant, main-transformer conservator oil level is an automatically-monitored important step of power plant, but because conservator outdoor environment of living in, the operating condition very severe, its running temperature up to 80 ℃ about, reach-40 ℃ when low, have a humid climate etc., main-transformer produces several ten thousand volt high pressure when sending power transformation in addition, disturb very big to electronic component, even cisco unity malfunction almost, all be difficult to overcome this high-intensity electromagnetic interference (EMI) and difference variation as pressure-active element (bridge circuit) or diffuse si formula pressure-active element.Because the oil of conservator is wanted absolute air-isolation, is not all right at all so adopt the liquid level instrument of general float-type.At present, mechanical pull bar pointer-type content gauge is adopted in the monitoring of conservator oil level, and up to more than 5 meters, personnel observe very inconvenient apart from ground, and error is also very big.Pull bar blocks or gets rusty and also happens occasionally, and this instrument is a kind of simple mechanicalness instrument, can not satisfy the oil level monitoring and the central controlled modern requirement automatically of present power plant at all.

The purpose of this utility model is designed a kind of anti-high-strength magnetic exactly and is disturbed, and temperature difference resistance is good, can realize real-time monitoring, can carry out distant signal (4-20mA) again and transmit Centralized Monitoring, and the scene also can the digital transformer conservator liquid level monitoring device that dynamically shows.

Transformer conservator liquid level monitoring device described in the utility model is by three grades of oil level supervisory systems, the constant force spring clockwork spring, warning system, digital circuits etc. are partly formed, one-level oil level supervisory system is made up of two fluted disc and two microswitches with main shaft, fluted disc is again to be made of interior top wheel and foreign steamer, respectively have on the foreign steamer one group with the other side not in the same way external tooth and the internal tooth reverse with external tooth, on the wheel of interior top one group of thimble back-moving spring and thimble are housed respectively, fluted disc and microswitch are connected by the microswitch depression bar, the main shaft of top wheel is suitable or when rotating counterclockwise in connecting, all can drive suitable or contrary fluted disc rotates, drive the microswitch depression bar by external tooth, microswitch is left, close.In the following liquid level reading that rises or fall of open and close number of times.Secondary oil level supervisory system is the driving wheel that links to each other by with main shaft, the engaged wheel parallel with driving wheel, twist on the driving wheel, walk around engaged wheel and pass elasticity unthreaded hole steel band and infrared emission tube and the infrared receiver tube formation that base plate is connected with liquid level conservator isolation rubber slab, the discriminating direction switch is arranged between the driven wheel, when liquid level raises, elasticity unthreaded hole steel band passes through engaged wheel, twist on the driving wheel, because the effect of elastic force drives connected main shaft and turns round clockwise, drives the work of one-level oil level supervisory system simultaneously.Otherwise, when liquid level reduces, owing to isolate the action of gravity of rubber slab, elasticity unthreaded hole steel strip driving spindle axis counterclockwise rotation.Pass steel band hole time counting number by infrared emission tube and infrared receiver tube, the discriminating direction switch identification is liter or falls.Three grades of oil level supervisory systems are made up of two-way gear and microswitch, by bidirectional final switch pinch roller with the two UNICOM, no matter main shaft along or motion counterclockwise, all can microswitch be closed, close, in the folding number of times liquid level reading that rises or fall down by bidirectional final switch pinch roller.Warning system is to be made of two parts, one is the analog signals output system that is made of slide rheostat that is contained in the main shaft front portion, one be the main shaft end by on, lower limit is adjusted screw rod, on, the lower limit microswitch, with main shaft link on, lower limit is carried out slide block, the interrupted amount signal output system that balance wheel constitutes, can be by last, lower limit is adjusted the highest minimum spacing alarm that screw rod is freely selected pasta, because the up time of main shaft or rotate counterclockwise, make, lower limit is carried out slide block past or anti-slip on main shaft, when reaching the highest or minimum when spacing, all may touch microswitch and report to the police.Front end at main shaft is equipped with the constant force spring clockwork spring, and the inner is fixed on the main shaft, and the outer end is fixed on the spring box inwall, screws in the time of clockwise, loosens in the time of counterclockwise, constitutes the power system that main shaft rotates with the elasticity unthreaded hole steel band of secondary supervisory system.Constituting liquid level by digital circuit shows and signal transmission system.Above-mentioned microswitch all can add 12V-38V, 100-500mA or bigger anti-jamming power-supply, mechanical part is realized positive and negative two-way stirring or the pressing microswitch, and the switching value that again these is had directivity is delivered in the digital circuit, thereby reaches the purpose that anti-high strength is disturbed the pasta monitoring.

Transformer conservator liquid level monitoring device described in the utility model, reasonable in design, simple in structure, flexible and convenient operation, anti-various interference are strong, man-machine interface is good, because three grades of monitoring are arranged, monitoring is complementary, increased the reliability of monitoring, degree of accuracy, after the hydroelectric power plant carried out on-the-spot test, the utility model reached the relevant technologies standard of desired country of power plant fully.

Embodiment

With reference to the accompanying drawings the structure of transformer conservator liquid level monitoring device described in the utility model is carried out detailed narration below.

Fig. 1 transformer conservator liquid level monitoring device front view.

Fig. 2 transformer conservator liquid level monitoring device constant force spring going barrel side view.

The counterclockwise fluted disc side view of Fig. 3 transformer conservator liquid level monitoring device.

The clockwise fluted disc side view of Fig. 4 transformer conservator liquid level monitoring device.

Fig. 5 transformer conservator liquid level monitoring device elasticity unthreaded hole steel belt disk side view.

The two-way fluted disc side view of Fig. 6 transformer conservator liquid level monitoring device.

Fig. 7 transformer conservator liquid level monitoring device upper and lower limit warning system side view.

Wherein:

1．2．3．4．5．6．7．8．9．10．11．12．13．14．15．16．17．18．19．10．、21．22．23．24．25．26．27．、28．29．30．31．32．33．34．35．36．37．38．39．40．41．42．43．44．45．46．47．48．49．50．51．52．53．54．55．56．57．58．59．60．61．62．63．64．65．66．67．68．69．70．71．72．73．74．75．76．77．78．79．80．81．82．83．84．85．86．87．8889．90．91．92．93．94．9596．97．98．99．100．

The clockwise fluted disc of one-level (12) at first is installed, and foreign steamer (65) is by clockwise foreign steamer internal tooth (60) clockwise, clockwise bearing ball groove (61), and foreign steamer external tooth (62) is integral by machining clockwise.Top wheel (59) clockwise, outer wheel cap screw thread (63) becomes one with main shaft (7) by machining clockwise.In the clockwise thimble seat groove (70) in being installed in clockwise thimble (68) clockwise on the wheel of top, in wheel hole in top in clockwise thimble back-moving spring (69) insertion clockwise, an end withstands on clockwise thimble inboard.The dress bearing ball is put into clockwise bearing ball groove, and both sides all have.Take turns on the top in more clockwise foreign steamer being contained in clockwise.Outer wheel cap (58) screws by clockwise outer wheel cap screw thread clockwise.With clockwise microswitch depression bar (64) with clockwise fluted disc and clockwise microswitch UNICOM.

The assembling of fluted disc (9) counterclockwise: foreign steamer (53) is by counterclockwise foreign steamer internal tooth (46) counterclockwise, counterclockwise bearing ball groove (56), foreign steamer external tooth (54) is integral by machining counterclockwise, and (45) are taken turns on interior counterclockwise top, and outer wheel cap screw thread and main shaft are by being processed into one counterclockwise.In the counterclockwise thimble seat groove (49) in being installed in counterclockwise thimble (48) counterclockwise on the wheel of top, in wheel hole in top in counterclockwise thimble back-moving spring (47) insertion counterclockwise, an end withstands on counterclockwise thimble inboard.Bearing ball is put into counterclockwise bearing ball groove, and both sides all have.Counterclockwise foreign steamer is contained on the wheel of interior counterclockwise top, outer wheel cap (57) screws by counterclockwise outer wheel cap screw thread (55) counterclockwise again.With counterclockwise microswitch depression bar (52) with counterclockwise fluted disc and counterclockwise microswitch UNICOM.

Main shaft is fixed on the base plate (3) by right-hand member bearing box base (35) and left end bearing box base (38) by left end bearing box (8) and right-hand member bearing box (18), builds bearing lid (17).Engaged wheel (72) is fixed on the base plate by follower shaft (74) and engaged wheel support (73), the elasticity unthreaded hole steel band (14) that will have unthreaded hole (36) twists on the driving wheel (80), form an elasticity unthreaded hole steel belt disk (81), steel band one end is fixed on the main wheel, the other end passes nylon slide block (79) on engaged wheel, the hole of passing through again on the base plate links to each other infrared emission tube (71) with web joint (37), and infrared receiver tube (86) is fixed on the base plate of elasticity unthreaded hole steel band both sides.Discriminating direction switch (13) be by move down differentiate switch column (75) and on move differentiation switch column (78) and be fixed on the insulcrete (76), insulcrete is fixed on the discriminating direction column holder (84), upper and lower differentiation post will insulate.Discriminating direction contact post (77) is fixed on the nylon slide block, with sliding friction steel ball (82), pressure spring (83), pressure is adjusted screw rod (85) and is installed successively, and the discriminating direction column holder is fixed on the base plate, and elasticity unthreaded hole steel band main wheel and main shaft are one.

Bi-directional teeth (87), two-way gear (88) is formed two-way fluted disc (16) with main shaft, bidirectional final switch (15) is fixed on the bidirectional final switch pedestal (90) by bidirectional final switch fixed orifice (91), base is fixed on the bidirectional final switch bracket (93), support is fixed on the base plate, uses bidirectional final switch depression bar (92) with bidirectional final switch pinch roller (89) and bidirectional final switch UNICOM.

Balance wheel (29) is by balancing axle (98), and the balance wheel that passes on the balance wheel support (94) is adjusted hole (28), is fixed on upper and lower limit by balance wheel fastening nut (97) and carries out on the slide block (20).Upper limit outside back of the body cap (23) is screwed in the upper limit to be adjusted on the screw rod (24), the upper limit is adjusted screw rod pass upward hole of bound adjustment bearing support (27), then the upper limit is adjusted nut (22) and be screwed on the upper limit adjustment screw rod, again upper limit microswitch (21) is fixed on the upper limit and adjusts on the screw rod.Lower limit outside back of the body cap (30) is screwed in lower limit to be adjusted on the screw rod (33), lower limit adjustment screw rod passes the following hole on the upper and lower limit adjustment bearing support (27) then, lower limit being adjusted nut (32) is screwed on the lower limit adjustment screw rod again, lower limit microswitch (19) is fixed on the lower limit microswitch fixed bar (96), it is one that fixed bar and lower limit are adjusted screw rod again.Upper and lower limit is adjusted support and horizontal stand (34) all is fixed on the base plate.The upper limit is adjusted spiral shell handle (25) and lower limit adjust spiral shell handle (31) and be separately fixed at upper and lower limit and adjust on the screw rod, spring collar (26) is installed in the main shaft end, avoid upper and lower limit to carry out slide block and skid off.Upper and lower limit is carried out slide block and is connected with main shaft by moving slider screw (95).

Microswitch support (44) is fixed on the base plate, and counterclockwise microswitch (10) and clockwise microswitch (11) are passed through clockwise microswitch fixed orifice (66) and counterclockwise microswitch fixed orifice (50), is separately fixed on base (51) and (67).

Spring box (5) is fixed on the base plate by spring box support (4) and spring box base (39), constant force spring clockwork spring (43) the inner is fixed on main shaft and winds up in inner fixing (42) mouthful, and the outer end is fixed on the spring box inwall by clockwork spring outer end fixture (41).Spring lid (6) screws by clockwork spring lid screw thread (40) and spring box.Slide rheostat (99) knob and main shaft are fixed together, and are fixed on the base plate by slide rheostat support (100).Web joint is isolated rubber slab (2) with conservator and is connected, upper and lower when unsteady when transformer conservator oil level (1), isolate rubber slab by conservator and just make with web joint that elasticity unthreaded hole steel band is upper and lower to be moved, thereby make main shaft begin rotation, so just drive the microswitch of each system, start working.

Claims

1. transformer conservator liquid level monitoring device, it is by three grades of oil level supervisory systems, the constant force spring clockwork spring, warning system, digital circuit etc. are partly formed, and it is characterized in that:

One-level oil level supervisory system is made up of fluted disc (9), (12) and two microswitches (10), (11) of two same main shafts (7), fluted disc is again to take turns (59), (45) and foreign steamer (65), (53) formation by interior top, respectively have on the foreign steamer one group with the other side in the same way external tooth (62), (54) and internal tooth (60), (46) reverse not with external tooth, on the wheel of interior top one group of thimble back-moving spring (69), (47) and thimble (68), (48) are housed respectively, fluted disc and microswitch are connected by microswitch depression bar (64), (52);

Secondary oil level supervisory system is by the driving wheel that links to each other with main shaft (80) engaged wheel (72) parallel with driving wheel, twist on the driving wheel, walk around engaged wheel and pass elasticity unthreaded hole steel band (14) and infrared emission tube (71) and infrared receiver tube (86) formation that base plate (3) is connected with liquid level conservator isolation rubber slab (2), discriminating direction switch (13) is arranged between the driven wheel;

Three grades of oil level supervisory systems are made up of a two-way gear (88) and microswitch (15), by bidirectional final switch pinch roller (89) with the two UNICOM.

Warning system is to be made of two parts, one is the analog signals output system by slide rheostat (99) formation that is contained in the main shaft front portion, one is to adjust screw rod (24), (33) at the main shaft end by upper and lower limit, upper and lower limit microswitch (19), (21), carry out slide block (20) with the upper and lower limit that main shaft links, disconnected, the continuous amount signal output system that balance wheel (29) constitutes;

Constant force spring clockwork spring (43) is contained in front-end of spindle, and the inner is fixed on the main shaft, and the outer end is fixed on the spring box inwall;

2. transformer conservator liquid level monitoring device according to claim 1, it is characterized in that: discriminating direction switch (13) be by move down differentiate switch column (75) and on move differentiation switch column (78) and be fixed on the insulcrete (76), insulcrete is fixed on the discriminating direction column holder (84), upper and lower differentiation post insulation, discriminating direction contact post (77) is fixed on the nylon slide block;

3. transformer conservator liquid level monitoring device according to claim 1, it is characterized in that: microswitch can add 12V-38V, the anti-jamming power-supply of 100-500mA.