CN101256880A - Oil level gauge oil conservator - Google Patents

Abstract

The invention relates to a transformer oil storage tank, in particular to a non-electric signal contact pointer type oil storage tank for an oil level gauge. It has a cabinet wall, bottom plate, cover plate, oil plug, oil sample valve, moisture absorber, moisture absorber joint pipe and connecting pipe, etc. It mainly uses a pointer oil level gauge, which is installed on the cover plate. The float rod of the type oil level gauge extends into the interior of the oil conservator. The invention adopts the oil level gauge oil storage cabinet, which can prevent the transformer oil from being directly exposed to sunlight, avoid the aging effect of light on the oil, and delay the aging process of insulating oil; Dust, etc. enter the interior of the oil conservator to ensure that the insulating oil maintains a high insulation strength for a long period of time; because the pointer oil level gauge indicates clearly, the oil level can be clearly observed even at night, thereby ensuring that the transformer products Can run safely.

Description

Oil level gauge oil conservator

technical field

The invention relates to a transformer oil storage tank, in particular to a non-electric signal contact type oil level gauge oil storage tank.

Background technique

The transformer oil conservator will play the role of indicating the oil level, carrying out oil breathing and preventing oil aging under the normal operation of the product, which is directly related to whether the transformer can be safe, stable and long-term operation.

In the current structural design of small and medium-capacity, open-type oil-immersed power transformers, the oil level indicator of the equipped oil conservator usually adopts a plane oil gauge or a glass tube type oil gauge. When the plane oil gauge structure is used to indicate the oil level in the oil conservator, since the normal oil color of the transformer is light yellow and transparent, and the color difference between the transformer and the bottom plate of the oil gauge is small, it is difficult for the operation inspector to observe the oil level of the transformer from a long distance, and When transformer oil is directly exposed to sunlight, it will accelerate the aging of the oil, reduce the insulation capacity of the oil, increase the dielectric loss, corrode the metal parts, and affect the heat dissipation of the heating parts. When the glass tube type oil gauge is used, although the glass tube is equipped with a red floating ball, the oil level indicator is eye-catching, which is convenient for operation and maintenance personnel to observe the oil level, but also because the transformer oil is exposed to sunlight, it is easy to make the oil color darken and age , Quality deterioration. At the same time, because the glass tube and the red floating ball are easily damaged, the requirements for installation and transportation are relatively high.

Since the oil in the transformer plane oil meter and the glass tube oil meter is connected to the oil conservator, the aging oil in the oil meter is easily mixed into the oil conservator, and even enters the oil tank of the transformer body, deteriorating the electrical insulation performance of the product. Transformer oil shortage and oil aging directly affect the safe operation of the transformer.

Contents of the invention

The technical problem to be solved by the present invention is: to provide a method to overcome the problems that the oil color of the transformer is easily darkened and aged, the quality is deteriorated, the insulation performance of the oil is reduced, and the oil level of the transformer cannot be clearly observed due to the exposure of the transformer oil to sunlight. An oil level gauge oil conservator is provided, which reduces the workload of transformer oil management and ensures long-term safe operation of the product.

The technical solution adopted by the present invention to solve the technical problem is: an oil level gauge oil storage tank has a cabinet wall, a bottom plate, a cover plate, an oil filling plug, an oil sample valve, a moisture absorber, and a moisture absorber connecting pipe for connecting the oil storage The connecting pipe, bracket and corner of the cabinet and the top cover of the transformer, the cabinet wall is a cylindrical structure, one end is welded with a bottom plate, the other end is welded with a cover plate, and there is also a pointer oil level gauge, the pointer type The oil level gauge is installed on the cover plate, and the floating rod on the pointer type oil level gauge extends into the interior of the oil conservator. The oil level gauge does not have high and low pressure oil level electrical signal contacts, and the structure is simple and reliable.

The installation method of the pointer oil level gauge is to open a round hole in the center of the cover plate, and weld the installation flange for installing the pointer oil level gauge. The screw hole on the installation flange is a blind hole, and the installation flange and the The welding of the cover plate is a fully welded structure inside and outside.

The structure of the pointer oil level gauge is a disc type, flat installation structure, and the pointer and the inner scale of the dial of the pointer oil level gauge are all painted with luminous visible paint, which is convenient for long-distance observation of the oil level. The floating rod of the oil level gauge is equipped with a float that can drive the floating rod to rotate with the change of the oil level, and a sealing groove for fixing the sealing ring is milled on the mounting surface of the dial. The pointer in the dial is in the same deflection direction as the floating rod, and the scale of the dial pointed by the pointer is the height of the oil level in the oil conservator. The surface of the oil level gauge adopts plastic spray coating process, which has good weather resistance.

When the gas relay is not installed in the oil conservator, one end of the connecting pipe extends into the cabinet wall, and the other end is welded with a connecting flange, and the connecting pipe is connected to the top cover of the transformer through the connecting flange and the seal.

When the gas relay is installed in the oil conservator, the connecting pipe is divided into an upper elbow and a lower elbow. One end of the upper elbow extends into the cabinet wall, and the other end is welded with a connecting flange. Butterfly valve, both ends of the lower elbow have connecting flanges, one end is connected with the gas relay, the other end is connected with the top cover of the transformer, and a seal is installed at the connection.

The adoption of the present invention, compared with the existing electrified signal contact type pointer oil level gauge in the market, has the characteristics of simple and reliable structure, convenient installation, almost no increase in product manufacturing cost, good economy and the like. At the same time, because this product is used in a wide range of large-volume power supply and distribution systems, it is suitable for the renewal of oil conservator with a diameter of φ180～φ610mm, so it is an ideal substitute for the existing flat oil gauge and glass tube oil gauge oil conservator Taste.

The beneficial effects of the present invention are: the present invention adopts the non-electric signal contact pointer type oil level gauge oil conservator, which can prevent the transformer oil from being directly exposed to sunlight, avoid the aging effect of light on the oil, and delay the aging process of insulating oil; The oil conservator is equipped with a hygroscopic device, which can prevent moisture and dust in the air from entering the interior of the oil conservator to ensure that the insulating oil maintains a high insulation strength for a long time; because the pointer oil level gauge indicates clearly, even in the The oil level can be clearly observed at night, so as to ensure the safe operation of transformer products; when the product is used in areas within the tropic of latitude 23° north and south, its anti-oil aging and weather resistance effects are particularly obvious.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a front view of Embodiment 1 of the present invention.

Fig. 2 is a right side view of Fig. 1 .

Fig. 3 is a front view of Embodiment 2 of the present invention.

Fig. 4 is a right side view of Fig. 3 .

In the figure: 1. cabinet wall, 2. bottom plate, 3. cover plate, 4. pointer oil level gauge, 5. oil filling plug, 6. oil sample valve, 7. moisture absorber, 8. moisture absorber joint pipe, 9. Connecting pipe, 10. bracket, 11. cabinet corner, 12. float, 13. gas relay, 14. upper elbow, 15. lower elbow, 16. butterfly valve.

Detailed ways

As shown in Figures 1 and 3, an oil storage cabinet for oil level gauges has a cabinet wall 1, a bottom plate 2, a cover plate 3, an oil filling plug 5, an oil sample valve 6, a moisture absorber 7, and a moisture absorber connecting pipe 8 for connecting The connecting pipe 9, bracket 10 and cabinet feet 11 of the oil conservator and the top cover of the transformer, the cabinet wall 1 is a cylindrical structure, one end is welded with a bottom plate 2, the other end is welded with a cover plate 3, and there is also a pointer oil Level gauge 4, the pointer type oil level gauge 4 is installed on the cover plate 3, and the floating rod on the pointer type oil level gauge 4 extends into the inside of the oil conservator.

As shown in Figures 1 and 2, the preparatory work for the first embodiment is to install the pointer oil level gauge 4 on the cover plate 3, fix the cover plate 3 on the cabinet wall 1 with seals and bolts, and assemble the oil sample at the same time. Valve 6 and oil plug 5, use seals and bolts to fix the connecting pipe 9 on the transformer box cover, install the oil conservator cabinet foot 11, use bolts to fix the bracket 10 on the cabinet foot 11, and use seals and bolts to absorb moisture Device 7 is connected with moisture absorber connecting pipe 8.

As shown in Figures 1 and 2, the specific working process and principle of the implementation scheme 1 are further introduced. Open the oil cup at the lower part of the moisture absorber 7, take off the gasket, inject about 2/3 of the oil into the oil cup, and then screw on the oil cup. Open the oil filling plug 5, and inject transformer oil to the corresponding height according to the oil temperature and ambient temperature. As the oil level in the oil conservator rises and falls, the float 12 of the pointer oil level gauge 4 is driven to rise and fall, and the pointer of the pointer oil level gauge 4 deflects thereupon to indicate the oil level in the tank. When the oil level rises, the air in the oil conservator is exhausted through the moisture absorber 7; when the oil level drops, the oil conservator can suck in air through the moisture absorber 7. Similarly, when the transformer is running, the temperature of the transformer oil will change with the change of the ambient temperature and load, and the oil level of the transformer will change due to the shrinkage and expansion of the oil. At this time, the float of the pointer oil level gauge 4 will be The pointer is driven to deflect to indicate the corresponding oil level, and the air in the oil conservator is also breathed through the moisture absorber 7 .

As shown in Figures 3 and 4, the pointer oil level gauge 4 is installed on the cover plate 3 during the preparation work of the second embodiment, and the cover plate 3 is fixed on the cabinet wall 1 with seals and bolts, and the oil sample is assembled at the same time. The valve 6 and the oil filling plug 5 are used to connect the moisture absorber 7 and the moisture absorber joint pipe 8 with seals and bolts, and the butterfly valve 16, the gas relay 13 and the lower bend pipe 15 are sequentially installed on the flange side of the upper elbow 14, and the seals are used to and bolts to fix the lower bend pipe 15 on the transformer box cover, install the oil conservator cabinet feet 11, and fix the bracket 7 on the cabinet feet 11 with bolts.

As shown in Figures 3 and 4, the specific working process and principle of the second embodiment are further introduced. Open the oil cup at the lower part of the moisture absorber 7, take off the gasket, inject about 2/3 of the oil into the oil cup, and then screw on the oil cup. Open the butterfly valve installed between the upper elbow 14 and the gas relay 13, open the oil filling plug 5, and inject transformer oil to a corresponding height according to the oil temperature and ambient temperature. Along with the rise and fall of the oil level in the oil conservator, the float 12 of the pointer oil level gauge 4 is driven to rise and fall, and the pointer in the dial of the pointer oil level gauge 4 deflects thereupon, indicating the corresponding oil level in the tank. When the oil level rises, the air in the oil conservator is exhausted through the moisture absorber 7; when the oil level drops, the oil conservator can suck in air through the moisture absorber 7. Similarly, when the transformer is running, the temperature of the transformer oil will change with the change of the ambient temperature and load, and the oil level of the transformer will change due to the shrinkage and expansion of the oil. At this time, the float 12 of the pointer oil level gauge 4 will The deflection of the pointer will be driven to indicate the corresponding oil level in the tank, and the air in the oil conservator will also breathe through the moisture absorber 7 .

Claims (5)

1. An oil storage tank for oil level gauge, which has a cabinet wall (1), a bottom plate (2), a cover plate (3), an oil filling plug (5), an oil sample valve (6), a moisture absorber (7), and a moisture absorber Union pipe (8), connecting pipe (9) for connecting the oil conservator and the top cover of the transformer, bracket (10) and cabinet corner (11), the cabinet wall (1) is a cylindrical structure, one end is welded There is a bottom plate (2), and a cover plate (3) is welded at the other end, and the feature is that it also has a pointer oil level gauge (4), and the pointer type oil level gauge (4) is installed on the cover plate (3) , the floating rod on the pointer oil level gauge (4) extends into the interior of the oil conservator. 2. The oil level gauge oil conservator according to claim 1, characterized in that: the pointer type oil level gauge (4) is installed by opening a round hole in the center of the cover plate (3) and welding it with Install the mounting flange of the pointer type oil level gauge (4), the screw holes on the mounting flange are blind holes, and the mounting flange and the cover plate are welded into a fully welded structure inside and outside. 3. The oil level gauge oil conservator according to claim 1, characterized in that: the structure of the pointer oil level gauge (4) is a disc type, plane installation structure, and the pointer of the pointer type oil level gauge (4) and the inner scale of the dial are all painted with luminous visible paint. The float (12) that can drive the float to rotate with the change of oil level is installed on the floating rod. The mounting surface of the dial is milled with a sealing groove for fixing the sealing ring. Pointer type The oil level gauge has no high and low oil level contact signal output, and the surface of the oil level gauge adopts the spray coating process. 4. The oil conservator for oil level gauge according to claim 1, characterized in that: when the gas relay (13) is not installed in the oil conservator, one end of the connecting pipe (9) extends into the cabinet wall (1), and the other end is A connecting flange is welded, and the connecting pipe (9) is connected with the transformer top cover through the connecting flange and the seal. 5. The oil conservator for oil level gauge according to claim 1, characterized in that: when the gas relay (13) is installed in the oil conservator, the connecting pipe (9) is divided into an upper bend (14) and a lower bend ( 15), one end of the upper elbow (14) extends into the cabinet wall (1), the other end is welded with a connecting flange, a butterfly valve (16) is arranged between the upper elbow (14) and the gas relay (13), the lower Both ends of the elbow (15) have connecting flanges, one end is connected with the gas relay (13), the other end is connected with the transformer top cover, and a seal is installed at the joint.

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