阅读说明：本技术 一种油浸变压器补油装置及补油方法 (Oil-filling device and oil-filling method for oil-immersed transformer ) 是由 崔荣华 李红兵 赵永林 潘宝珠 于 2021-06-29 设计创作，主要内容包括：本发明涉及一种油浸变压器补油装置及补油方法,装置包括储油罐和控油罐,控油罐罐口覆设控油罐盖,储油罐底部固装在控油罐盖表面,且储油罐与控油罐可形成连通；控油罐与变压器之间布设排气管和输油管,输油管靠近控油罐底部；还包括控油器,其置于控油罐内,利用控油器的浮子所受的浮力,通过变压器内变压器油油位变化对控油罐内补油孔的通断进行控制,接着利用控油罐与变压器之间布设排气管以及输油管形成连通器,基于连通器原理实现对变压器内变压器油油位调节；本发明可以自动控制变压器油位,同时装置结构简单,可靠性高。(The invention relates to an oil filling device and an oil filling method for an oil immersed transformer, wherein the device comprises an oil storage tank and an oil control tank, an oil control tank cover covers the opening of the oil control tank, the bottom of the oil storage tank is fixedly arranged on the surface of the oil control tank cover, and the oil storage tank and the oil control tank can be communicated; an exhaust pipe and an oil delivery pipe are arranged between the oil control tank and the transformer, and the oil delivery pipe is close to the bottom of the oil control tank; the oil level of the transformer oil in the transformer is adjusted based on the principle of the communicating vessel; the invention can automatically control the oil level of the transformer, and has simple structure and high reliability.)

1. The utility model provides an oil immersed transformer mends oily device which characterized in that: the oil-control tank comprises an oil storage tank (6) and an oil-control tank (7), wherein an oil-control tank cover (3) covers the tank opening of the oil-control tank (7), the bottom of the oil storage tank (6) is fixedly arranged on the surface of the oil-control tank cover (3), and the oil storage tank (6) can be communicated with the oil-control tank (7);

an exhaust pipe (9) and an oil delivery pipe (8) are arranged between the oil control tank (7) and the transformer (1), and the oil delivery pipe (8) is close to the bottom of the oil control tank (7);

the oil control device is characterized by further comprising an oil controller (4) which is arranged in the oil control tank (7), wherein the oil controller (4) controls the connection or disconnection of the oil storage tank (6) and the oil control tank (7) through matching oil level change of the oil control tank (7) and the transformer (1).

2. The oil filling device of an oil immersed transformer according to claim 1, characterized in that: the oil controller (4) comprises a floating rod (43), a floater (41), a limiting frame (32) and an oil plug (42), a through oil supplementing hole (31) is formed in the center of the oil control tank cover (3), the oil control tank cover (3) is defined to be a bottom surface facing the inner direction of the oil control tank (7), the limiting frame (32) is fixed in the center of the bottom surface of the oil control tank cover (3), and the limiting frame (32) is provided with a limiting hole;

one end of the floating rod (43) is vertically fixed at the center of the floater (41), and the other end of the floating rod (43) is fixed at the center of the oil plug (42) after penetrating through the limiting hole.

3. The oil filling device of an oil immersed transformer according to claim 2, characterized in that: the oil supplementing hole (31) comprises three layers which are respectively a safety plug hole, an upper layer plug hole and a bottom layer plug hole which are communicated in sequence, the safety plug hole is positioned on the surface of the oil plug (42), and the inner diameters of the safety plug hole, the upper layer plug hole and the bottom layer plug hole are gradually increased to form a stepped structure;

the oil plug (42) comprises a safety plug (423), an upper plug (422) and a bottom plug (421) which are sequentially stacked, the diameters of the safety plug (423), the upper plug (422) and the bottom plug (421) are gradually increased, and the upper plug (422) and the bottom plug (421) are respectively matched with the upper plug hole and the bottom plug hole to realize the sealing of the oil supplementing hole (31);

when the upper plug (422) is matched with the upper plug hole and the bottom plug (421) is matched with the bottom plug hole for sealing, a gap is reserved between the safety plug (423) and the safety plug hole.

4. The oil filling device of an oil immersed transformer according to claim 2, characterized in that: an exhaust outer hole (34) is formed in the circumferential wall of the oil control tank cover (3), an exhaust inner hole (33) is formed in the bottom surface of the oil control tank cover (3), and the exhaust outer hole (34) is communicated with the exhaust inner hole (33).

5. The oil filling device of an oil immersed transformer according to claim 1, characterized in that: an oil storage tank cover (5) covers the tank opening of the oil storage tank (6), and a through oil filling hole is formed in the oil storage tank cover (5).

6. The oil filling device of an oil immersed transformer according to claim 5, characterized in that: an observation window is arranged on the tank body of the oil storage tank (6) and used for observing the oil level in the oil storage tank (6).

7. An oil supplementing method based on the oil supplementing device of the oil immersed transformer according to any one of claims 1 to 6, characterized by comprising the following steps:

the oil level of the transformer oil in the transformer (1) is adjusted by utilizing buoyancy borne by a floater (41) of the oil controller (4) and controlling the on-off of an oil supplementing hole (31) in the oil control tank (7) through the oil level change of the transformer oil in the transformer (1), then an exhaust pipe (9) and an oil conveying pipe (8) are arranged between the oil control tank (7) and the transformer (1) to form a communicating vessel.

8. The oil filling method of the oil filling device of the oil-immersed transformer according to claim 7, wherein:

when oil is stored in the oil storage tank (6), the oil level of transformer oil in the transformer (1) is located above a critical line, meanwhile, the oil level in the oil tank (7) is located above the critical line, the floater (41) is immersed in the transformer oil and has a large volume, namely the buoyancy force borne by the floater (41) is larger than the gravity of the oil controller (4) and the pressure of the transformer oil in the oil storage tank (6) on an oil plug (42), the oil plug (42) is embedded into the oil supplementing hole (31) to be sealed under the buoyancy force pushing of the floater (41), the oil storage tank (6) is not communicated with the oil control tank (7), the transformer oil in the oil storage tank (6) is interrupted to flow into the oil control tank (7), and the oil level of the transformer oil in the oil control tank (7) is kept unchanged.

9. The oil filling method of the oil filling device of the oil-immersed transformer according to claim 8, wherein:

when oil is stored in the oil storage tank (6), the oil level of transformer oil in the transformer (1) is gradually close to a critical line, the oil level in the oil tank (7) is controlled to be close to the critical line, the volume of the floater (41) immersed in the oil in the transformer (1) is reduced, namely, the buoyancy force borne by the floater (41) is smaller than the gravity of the oil control device (4) and the pressure of the transformer oil in the oil storage tank (6) on an oil plug (42), the floating rod (43) moves towards the bottom of the oil control tank (7) to drive the oil plug (42) to leave from the oil supplementing hole (31), the oil storage tank (6) is communicated with the oil control tank (7), the transformer oil in the oil control tank flows into the oil control tank (7), the transformer oil in the oil control tank is supplemented into the transformer (1) through the oil delivery pipe (8), the oil control device (4) moves towards the oil control tank cover (3), and the oil plug (42) is driven to be embedded into the oil supplementing hole (31) along with the movement of the oil control tank cover (3) of the floater (41), the oil level of the transformer oil in the oil control tank (7) gradually rises, the volume of the floater (41) immersed in the transformer oil gradually increases until the oil plug (42) seals the oil supplementing hole (31), and the transformer oil is in a sufficient state at the moment.

10. The oil filling method of the oil filling device of the oil-immersed transformer according to claim 9, wherein: when a small amount of particle impurities exist in the transformer oil, the sealing of the upper layer plug (422) fails, and the oil supplementing hole (31) is sealed by the bottom layer plug (421);

when a small amount of particle impurities exist in the transformer oil, the sealing of the bottom layer plug (421) fails, and the oil supplementing hole (31) is sealed by the upper layer plug (422);

when a small amount of particle impurities exist in the transformer oil, the upper plug (422) and the bottom plug (421) are both subjected to sealing failure, the transformer oil in the oil storage tank (6) continuously flows into the oil control tank (7), the oil level of the transformer oil in the oil control tank (7) continuously rises, the volume of the floater (41) of the oil controller (4) immersed in the transformer oil is continuously increased, the bottom plug (421) and the upper plug (422) are finally deformed, and the safety plug (423) is embedded into the safety plug hole for sealing.

Technical Field

The invention relates to an oil supplementing device and an oil supplementing method for an oil immersed transformer, and belongs to the field of transformers.

Background

In the transformer maintenance process, it is a necessary step to supply transformer oil to the transformer, and the existing transformer generally adopts an oil level meter to measure the amount of oil in the transformer, and when the oil amount is found to be less, the oil is required to be supplied by power failure, and the oil is required to be supplied by power failure, so that the life of people is influenced to a certain extent, and when the transformer is used, personnel is required to be arranged frequently to carry out patrol, and the problem of the transformer is found in time.

In order to change the passive oil compensation for the transformer, researchers develop more active oil compensation devices, for example, the application with the application number of 201721790225.7, and disclose a transformer oil compensation device which comprises an oil storage barrel, an oil inlet pipe and an oil compensation pipe, wherein a piston is installed in the oil storage barrel and connected with a piston rod, a fixed upright post is arranged on the outer side of the oil storage barrel, the upper end of the upright post is hinged with a swing rod through a fixed pin shaft, and the tail end of the swing rod is hinged at the end part of the piston rod through a movable pin shaft; a check valve is arranged on the oil inlet pipe communicated with the oil storage barrel, and a quantitative adjusting valve is arranged on the oil supplementing pipe communicated with the oil storage barrel; meanwhile, a thrust spring is sleeved on the piston rod, and the upper end and the lower end of the thrust spring respectively push against the upper wall of the oil storage barrel and the surface of the piston rod. However, in the application, the purpose of quantitatively supplying oil is realized by matching a thrust spring at the inner end of the oil storage barrel with a quantitative regulating valve to realize one-time manual oil pumping treatment for automatically supplying oil, so that the autonomous oil supplying operation cannot be completely realized.

Therefore, a novel oil supplementing device for a transformer is needed, and long-term automatic oil level control can be realized.

Disclosure of Invention

The invention provides an oil supplementing device and an oil supplementing method for an oil immersed transformer, which can automatically control the oil level of the transformer and have simple structure and high reliability.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an oil filling device of an oil immersed transformer comprises an oil storage tank and an oil control tank, wherein an oil control tank cover covers an opening of the oil control tank, the bottom of the oil storage tank is fixedly arranged on the surface of the oil control tank cover, and the oil storage tank and the oil control tank can be communicated;

an exhaust pipe and an oil delivery pipe are arranged between the oil control tank and the transformer, and the oil delivery pipe is close to the bottom of the oil control tank;

the oil control device is arranged in the oil control tank and controls the connection or disconnection of the oil storage tank and the oil control tank through matching oil level change of the transformer in the oil control tank;

as a further preferred aspect of the present invention, the oil controller includes a float rod, a float, a limit frame and an oil plug, a through oil replenishing hole is formed in the center of the oil control tank cover, the direction of the oil control tank cover facing the inside of the oil control tank is defined as a bottom surface, the limit frame is fixed at the center of the bottom surface of the oil control tank cover, and the limit hole is formed in the limit frame;

one end of the floating rod is vertically fixed in the center of the floater, and the other end of the floating rod penetrates through the limiting hole and then is fixed in the center of the oil plug;

as a further preferable mode of the present invention, the oil supply hole includes three layers, each of which is a fuse plug hole, an upper plug hole and a bottom plug hole that are sequentially communicated, and the fuse plug hole is located on the surface of the oil plug, and the inner diameters of the fuse plug hole, the upper plug hole and the bottom plug hole are gradually increased to form a stepped structure;

the oil plug comprises a safety plug, an upper plug and a bottom plug which are sequentially stacked, the diameters of the safety plug, the upper plug and the bottom plug are gradually increased, and the upper plug and the bottom plug are respectively matched with the upper plug hole and the bottom plug hole to realize the sealing of the oil supplementing hole;

when the upper plug is matched with the upper plug hole and the bottom plug is matched with the bottom plug hole for sealing, a gap is reserved between the safety plug and the safety plug hole;

as a further preferred aspect of the present invention, an exhaust outer hole is formed on the circumferential wall of the oil control tank cover, an exhaust inner hole is formed on the bottom surface of the oil control tank cover, and the exhaust outer hole is communicated with the exhaust inner hole;

as a further preferred aspect of the present invention, an oil storage tank cover covers the oil storage tank mouth, and a through oil injection hole is formed in the oil storage tank cover;

as a further preferable aspect of the present invention, an observation window is installed on the oil storage tank body for observing the oil level in the oil storage tank;

an oil supplementing method based on the oil supplementing device of the oil immersed transformer,

the oil level of the transformer oil in the transformer is adjusted based on the principle of a communicating vessel by controlling the on-off of an oil supplementing hole in an oil control tank through the oil level change of the transformer oil in the transformer by utilizing the buoyancy borne by a floater of the oil control tank, then arranging an exhaust pipe and an oil conveying pipe between the oil control tank and the transformer to form the communicating vessel;

as a further preferable aspect of the present invention, when oil is stored in the oil storage tank, the oil level of transformer oil in the transformer is located above a critical line, and the oil level in the oil control tank is located above the critical line, the float is immersed in the transformer oil and has a large volume, that is, the buoyancy force applied to the float is greater than the gravity of the oil controller and the pressure of the transformer oil in the oil storage tank on the oil plug, the oil plug is embedded into the oil supplementing hole under the buoyancy force of the float to seal, the oil storage tank is not communicated with the oil control tank, the transformer oil in the oil storage tank stops flowing into the oil control tank, and the oil level of the transformer oil in the oil control tank remains unchanged;

as a further preferred aspect of the present invention, when the oil is stored in the oil storage tank, the oil level of the transformer oil in the transformer gradually approaches the critical line, meanwhile, the oil level in the oil control tank is close to a critical line, the volume of the floater immersed in the transformer oil is reduced, namely, the buoyancy borne by the floater is smaller than the gravity of the oil control device and the pressure of the transformer oil in the oil storage tank to the oil plug, the floating rod moves towards the bottom of the oil control tank to drive the oil plug to leave from the oil supplementing hole, the oil storage tank is communicated with the oil control tank, the transformer oil in the oil storage tank flows into the oil control tank, the transformer oil in the oil control tank is supplemented into the transformer through an oil conveying pipe, the oil control device moves towards the oil control tank cover, the oil plug is driven to be embedded into the oil supplementing hole along with the movement of the floater towards the oil control tank cover, the oil level of the transformer oil in the oil control tank gradually rises, the volume of the floater immersed in the transformer oil gradually increases until the oil supplementing hole is sealed by the oil plug, and the transformer oil is in a sufficient state at the moment;

as a further preference of the present invention, when a small amount of particulate impurities are present in the transformer oil, which results in the failure of the upper plug seal, the bottom plug seals the oil supply hole;

when a small amount of particle impurities exist in the transformer oil, the bottom plug is sealed to lose effectiveness, and the upper plug seals the oil supplementing hole;

when a small amount of particle impurities exist in the transformer oil, the upper plug and the bottom plug are sealed and lose effectiveness, the transformer oil in the oil storage tank continuously flows into the oil control tank at the moment, the oil level of the transformer oil in the oil control tank continuously rises, the volume of the floater of the oil control device immersed in the transformer oil is continuously increased, finally, the bottom plug and the upper plug are deformed, and the safety plug is embedded into the safety plug hole for sealing.

Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, an oil pipeline and an exhaust pipe are arranged between the oil control tank and the transformer, and the change condition of the oil level in the transformer is monitored in real time by utilizing the principle of a communicating vessel;

2. according to the invention, the oil control device is arranged in the oil control tank, and the on-off of the oil control tank and the oil storage tank is controlled through the change of the oil level in the transformer, so that the automatic oil supplementing operation of the transformer is realized.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of a preferred embodiment provided by the present invention;

FIG. 2 is a schematic view of the internal structure of an oil control tank according to a preferred embodiment of the present invention;

FIG. 3 is a schematic view of the bottom of a preferred embodiment of the oil control tank lid provided in accordance with the present invention;

FIG. 4 is a schematic diagram of an oil control device according to a preferred embodiment of the present invention;

FIG. 5 is a schematic diagram of the connection of an oil control device and an oil control tank cover according to a preferred embodiment of the present invention;

fig. 6 is a schematic structural diagram of the oil plug and the oil filling hole in the preferred embodiment of the invention after being matched.

In the figure: 1 is the transformer, 2 is the oil supply device body, 3 is the oil control cover, 31 is the oil supply hole, 32 is the spacing, 33 is the exhaust hole, 34 is the exhaust outer bore, 4 is the oil control ware, 41 is the float, 42 is the oil plug, 421 is the bottom stopper, 422 is the upper plug, 423 is the safety plug, 43 is the float rod, 5 is the oil storage tank lid, 6 is the oil storage tank, 7 is the oil control jar, 8 is defeated oil pipe, 9 is the blast pipe.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present application, it is to be understood that the terms "left side", "right side", "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and that "first", "second", and the like do not indicate a degree of importance to the component parts and thus should not be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

In order to avoid the situation of power failure oil supplement when the transformer is maintained, the application provides an oil supplement device, which can realize the automatic oil supplement operation of the transformer through a simple structure.

From the overall structure of fig. 1, the oil supplementing device comprises an oil storage tank 6 and an oil control tank 7, wherein the oil storage tank and the oil control tank are combined to be used as an oil supplementing device body 2, an oil control tank cover 3 covers an opening of the oil control tank, the bottom of the oil storage tank is fixedly arranged on the surface of the oil control tank cover, an exhaust pipe 9 and an oil conveying pipe 8 are arranged between the oil control tank and a transformer 1, and in order to realize the principle of a communicating vessel, the oil conveying pipe is positioned below the exhaust pipe in the view of fig. 1, namely the oil conveying pipe is close to the bottom of the oil control tank; meanwhile, on the basis of the principle of the communicating vessel, in order to realize the automatic oil supplementing operation of the oil control tank on the transformer, the oil storage tank and the oil control tank can be communicated, in other words, when the transformer oil in the transformer reaches an alarm value, the oil storage tank and the oil control tank are communicated, and when the transformer oil in the transformer is sufficient, the oil storage tank and the oil control tank are disconnected.

As for the on-off of the oil storage tank and the oil control tank is determined by the oil control device 4 arranged in the oil control tank according to the oil level change matched with the transformer in the oil control tank, the application provides a preferred embodiment of the oil control device, as shown in fig. 2, the oil control device comprises a floating rod 43, a floater 41, a limiting frame 32 and an oil plug 42, a through oil supplementing hole 31 is arranged at the center of the oil control tank cover, the direction of the oil control tank cover facing the inside of the oil control tank is defined as the bottom surface (the direction of the view in fig. 3 is the bottom surface of the oil control tank cover), the limiting frame is fixed at the center of the bottom surface of the oil control tank cover, and the limiting frame is provided with a limiting hole; as shown in fig. 4, one end of the floating rod is vertically fixed in the center of the float, and the other end of the floating rod is fixed in the center of the oil plug after penetrating through the limiting hole; the limit frame is designed to limit the up-and-down movement of the floating rod, so that the oil plug can move within an adjustable range; along with the change of transformer oil level in the transformer, through the upper and lower ups and downs of the interior float of linker principle drive accuse oil jar, the oil plug realizes sealing and opening of benefit oilhole in good time, can independently realize the benefit oil of transformer.

When the oil plug is repeatedly used for sealing the oil supplementing hole, the oil plug is easy to deform and leak oil, so that in order to improve the sealing performance of the oil plug and the oil supplementing hole, as shown in fig. 6, the oil supplementing hole comprises three layers, namely a safety plug hole, an upper plug hole and a bottom plug hole which are sequentially communicated, and the safety plug holes are positioned on the surface of the oil plug; the oil plug comprises a safety plug 423, an upper plug 422 and a bottom plug 421 which are sequentially stacked, the diameters of the safety plug, the upper plug and the bottom plug are gradually increased, and the upper plug and the bottom plug are respectively matched with the upper plug hole and the bottom plug hole to realize the sealing of the oil supplementing hole; the sealing performance of this application realizes that it is really through the multilayer guarantee, the first layer guarantee is the design of upper stopper and bottom stopper, both realize sealed to the first layer of benefit oilhole, fig. 6 is the specific example when upper stopper and bottom stopper are sealed, can see from the figure that insurance stopper and insurance consent are not sealed this moment, it is gapped between insurance stopper and the insurance consent promptly, this way is sealed for the second layer that realizes the benefit oilhole through the insurance stopper, oil mass rises gradually in the accuse oilhole, exert pressure to upper stopper and bottom stopper and lead to both deformations, the insurance stopper is pushed into in the insurance consent, block up the insurance consent.

Since the oil level of the transformer oil in the transformer is changed all the time, the air pressure in the oil control tank is driven to be unstable, and therefore, as shown in fig. 5, an outer exhaust hole 34 is formed in the circumferential wall of the oil control tank cover, an inner exhaust hole 33 is formed in the bottom surface of the oil control tank cover, and the outer exhaust hole is communicated with the inner exhaust hole, so that the air pressure in the oil control tank is balanced.

An oil storage tank cover 5 covers the opening of the oil storage tank, and a through oil filling hole is formed in the oil storage tank cover, so that oil can be supplemented to the oil storage tank in time; in order to assist in observing the conditions in the oil storage tank, an observation window is arranged on the oil storage tank body and used for observing the oil level in the oil storage tank.

Through the explanation of the embodiment, the oil supplementing device body can be known, then the applicant also provides an oil supplementing method based on the oil supplementing device, the principle of the oil supplementing method is that the on-off of the oil supplementing hole in the oil control tank is controlled through the change of the oil level of the transformer oil in the transformer by utilizing the buoyancy borne by the floater of the oil control device, then the communicating vessel is formed by arranging the exhaust pipe and the oil conveying pipe between the oil control tank and the transformer, and the oil level of the transformer oil in the transformer is adjusted based on the principle of the communicating vessel.

Specifically, in the first case, when oil is stored in the oil storage tank, the oil level of transformer oil in the transformer is located above a critical line, and the oil level in the oil control tank is located above the critical line, the float is immersed in the transformer oil and has a large volume, that is, the buoyancy borne by the float is larger than the gravity of the oil controller and the pressure of the transformer oil in the oil storage tank on an oil plug, the oil plug is embedded into the oil supplementing hole under the thrust of the buoyancy of the float to seal, the oil storage tank is not communicated with the oil control tank, the transformer oil in the oil storage tank stops flowing into the oil control tank, and the oil level of the transformer oil in the oil control tank remains unchanged.

Secondly, when oil is stored in the oil storage tank, the oil level of transformer oil in the transformer is gradually close to a critical line, meanwhile, the oil level in the oil control tank is close to a critical line, the volume of the floater immersed in the transformer oil is reduced, namely, the buoyancy borne by the floater is smaller than the gravity of the oil control device and the pressure of the transformer oil in the oil storage tank to the oil plug, the floating rod moves towards the bottom of the oil control tank to drive the oil plug to leave from the oil replenishing hole, the oil storage tank is communicated with the oil control tank, the transformer oil in the oil storage tank flows into the oil control tank, the transformer oil in the oil control tank is replenished into the transformer through an oil conveying pipe, the oil control device moves towards the oil control tank cover, the oil plug is driven to be embedded into the oil replenishing hole along with the movement of the floater towards the oil control tank cover, the oil level of the transformer oil in the oil control tank gradually rises, the volume of the floater immersed in the transformer oil gradually becomes larger until the oil replenishing hole is sealed, and the transformer oil is in a sufficient state at the moment.

Through the oil supplementing device provided by the application, remedial measures of an oil supplementing method can be realized, and particularly, when a small amount of particle impurities exist in transformer oil, the sealing of an upper plug fails, and a bottom plug seals an oil supplementing hole; when a small amount of particle impurities exist in the transformer oil, the bottom plug is sealed to lose effectiveness, and the upper plug seals the oil supplementing hole; when a small amount of particle impurities exist in the transformer oil, the upper plug and the bottom plug are sealed and lose effectiveness, the transformer oil in the oil storage tank continuously flows into the oil control tank at the moment, the oil level of the transformer oil in the oil control tank continuously rises, the volume of the floater of the oil control device immersed in the transformer oil is continuously increased, finally, the bottom plug and the upper plug are deformed, and the safety plug is embedded into the safety plug hole for sealing.

To sum up, this application can realize the autonomic benefit oil of transformer through simple device, mends oily device simultaneously and realizes the self-remediation measure, and the reliability is high, and low cost is fit for promoting on a large scale.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The meaning of "and/or" as used herein is intended to include both the individual components or both.

The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.