CN213660131U

CN213660131U - Full-sealing structure of oil-immersed transformer

Info

Publication number: CN213660131U
Application number: CN202022920079.3U
Authority: CN
Inventors: 刘小利
Original assignee: Nanjing Daqo Transformer Systems Co ltd
Current assignee: Nanjing Daqo Transformer Systems Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-09
Anticipated expiration: 2030-12-08

Abstract

The utility model relates to a full seal structure of oil-immersed transformer, including oil-immersed transformer box and case lid, oil-immersed transformer box opening is upwards, be provided with the oil pocket in the oil-immersed transformer box, be provided with the case edge on the border on the lateral wall of oil-immersed transformer box, the case lid sets up along the cooperation with the case, oil-immersed transformer box top is located to the case lid, be provided with first boss on the case lid, second boss and closing plate, form first recess between first boss and the second boss, form the second recess between second boss and the closing plate, the case is provided with along with the second boss complex third recess of pegging graft, the extension length of first boss is greater than the extension length of second boss. The utility model discloses an inside external pollutant impurity or rainwater got into the box were avoided in the setting of three-layer seal, caused the pollution to the oil in the box, increased the utility model discloses oil-immersed transformer's leakproofness and life.

Description

Full-sealing structure of oil-immersed transformer

Technical Field

The utility model relates to a transformer technical field especially relates to an oil-immersed transformer full seal structure.

Background

At present, with the pace of urban and rural power grid construction acceleration, the generated energy and the power consumption of China are increasing day by day. The transformer is widely applied to the fields of power plants, power supply stations, power distribution stations and the like. A large amount of oil is filled in the transformer, and if the transformer is in rainy weather, moisture enters the transformer through gaps of the tank cover of the oil tank, so that the insulating property of the transformer oil is reduced or deteriorated, and the operation quality and the service life of the transformer are influenced.

Therefore, how to provide a fully sealed structure of an oil-immersed transformer with good sealing effect is a technical problem to be solved by technical personnel in the field at present. In view of the above problems, the present designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and is engaged with the application of theory to actively make research and innovation, so as to create a polysilicon converter transformer, which is more practical.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the fully-sealed structure of the oil-immersed transformer is good in sealing effect.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides an oil-immersed transformer full-sealing structure, includes oil-immersed transformer box and case lid, oil-immersed transformer box opening upwards, be provided with the oil pocket in the oil-immersed transformer box, be provided with the case edge on the lateral wall of oil-immersed transformer box along, the case lid with the case sets up along the cooperation, the case lid is located oil-immersed transformer box top, be provided with first boss, second boss and closing plate on the case lid, form first recess between first boss and the second boss, form the second recess between second boss and the closing plate, the case be provided with on the edge with second boss grafting complex third recess, the extension length of first boss is greater than the extension length of second boss.

Furthermore, a fourth boss is arranged on one side, away from the oil cavity, of the third groove on the box edge, a fifth boss is arranged on one side, close to the oil cavity, of the third groove on the box edge, the fourth boss is matched with the first groove, and the fifth boss is matched with the second groove.

Further, the first groove comprises a first surface perpendicular to the bottom surface of the first groove, a bottom surface perpendicular to the first surface, and a second surface forming an acute angle with the bottom surface of the first groove. The first boss is in interference fit with the first groove.

Furthermore, the edge of the box cover is bent outwards to form a third boss, the extension length of the third boss is greater than that of the first boss,

the box is along bending downwards and forming the kink, the kink is the setting of predetermineeing the contained angle with the horizontal direction, the third boss sets up in kink top.

Further, a gap is formed between the second boss and the bottom surface of the third groove.

Furthermore, one side, close to the oil cavity, of the fifth boss is provided with a fixing portion, a clamping groove is formed in the side face, close to the oil cavity, of the fixing portion, a clamping sheet is correspondingly arranged on the sealing plate, the top face of the clamping sheet is tightly attached to the inner wall of the clamping groove, and the case cover is connected with the oil-immersed transformer case in a clamping mode.

Furthermore, the joint of the top surface of the fixing part and the side wall close to the oil cavity is provided with a first slope surface, the joint of the top surface of the clamping sheet and the bottom surface of the clamping sheet is provided with a second slope surface, and the inclination directions of the first slope surface and the second slope surface are consistent.

Further, the bottom surface of the first boss is completely attached to the highest surface of the bending part.

Furthermore, water absorption paper is laid in the gap.

The utility model has the advantages that:

the utility model discloses a setting of first boss, second boss and closing plate realizes the three-layer sealing for the connection of oil-immersed transformer box and case lid, avoids external pollutant impurity to get into the box through the setting of three-layer sealing inside, causes the pollution to the oil in the box, avoids external rainwater to get into inside the box simultaneously. The joint that realizes box and case lid through setting up of closing plate is fixed, avoids in vibrations or other extreme adverse conditions rainwater or other pollutants get into the box, has increased the utility model discloses oil-immersed transformer's leakproofness and life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is the utility model discloses oil-immersed transformer totally enclosed structure's schematic diagram.

Fig. 2 is a schematic view of the connection between the box cover and the box edge of the present invention.

Fig. 3 is a partially enlarged structural diagram of a portion a in fig. 2.

The reference signs are: the oil-immersed transformer comprises an oil-immersed transformer box body 1, a box cover 2, an oil cavity 3, a box edge 4, a first boss 21, a second boss 22, a sealing plate 23, a second groove 25, a third groove 43, a fourth boss 41, a fifth boss 42, a first surface 241, a second surface 242, a third boss 26, a bending part 44, a fixing part 411, a clamping groove 412, a first slope surface 414, a second slope surface 415, absorbent paper 5, a clamping sheet 413 and a first groove 24.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are the directions or positional relationships indicated on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.

Fig. 1-3 show a fully sealed structure of an oil-immersed transformer, including an oil-immersed transformer tank 1 and a tank cover 2, where an opening of the oil-immersed transformer tank 1 is upward, an oil chamber 3 is provided in the oil-immersed transformer tank 1, a tank edge 4 is provided on an upper edge of a side wall of the oil-immersed transformer tank 1, the tank cover 2 is disposed in cooperation with the tank edge 4, the tank cover 2 is covered above the oil-immersed transformer tank 1, the tank cover 2 is provided with a first boss 21, a second boss 22 and a sealing plate 23, a first groove 24 is formed between the first boss 21 and the second boss 22, a second groove 25 is formed between the second boss 22 and the sealing plate 23, the tank edge 4 is provided with a third groove 43 in plug-in fit with the second boss 22, and an extension length of the first boss 21 is greater than an extension length of the second boss.

The utility model discloses a setting of first boss 21, second boss 22 and closing plate 23, for the connection realization three-layer seal of oil-immersed transformer box 1 and case lid 2, inside pollutant impurity entering box of avoiding external world through three-layer seal's setting, cause the pollution to the oil in the box, inside avoiding external rainwater to get into the box simultaneously. Realize box and case lid 2's joint through setting up of closing plate 23 fixed, avoid in vibrations or other extreme adverse conditions rainwater or other pollutants get into the box, increased the utility model discloses oil-immersed transformer's leakproofness and life. Extension length through first boss 21 is greater than extension length of second boss 22, avoids inside liquid gets into the box, also avoids the fluid in the box to spill over the box simultaneously, has guaranteed the utility model discloses a sealed effect

Preferably, in the above embodiment, the case rim 4 is provided with a fourth boss 41 on a side of the third groove 43 away from the oil chamber 3, the case rim 4 is provided with a fifth boss 42 on a side of the third groove 43 close to the oil chamber 3, the fourth boss 41 is disposed in cooperation with the first groove 24, and the fifth boss 42 is disposed in cooperation with the second groove 25. Through the cooperation setting of fifth boss 42 and third recess 43, the laminating effect of case lid 2 and box has been guaranteed in the cooperation setting of fourth boss 41 and first recess 24, has increased the utility model discloses a leakproofness.

As a preference of the above embodiment, the first groove 24 includes a first surface 241 provided perpendicularly to the bottom surface of the first groove 24, a bottom surface provided perpendicularly to the first surface 241, and a second surface 242 provided at an acute angle to the bottom surface of the first groove 24. The first boss 21 is in interference fit with the first groove 24, and the sealing performance among the first boss 21, the first groove 24 and the fourth boss 41 is ensured.

As a preference of the above embodiment, the edge of the cover 2 is bent outward to form the third projection 26, the third projection 26 extends longer than the first projection 21,

the box is bent downwards along 4 to form a bent part 44, the bent part 44 is arranged at a preset included angle with the horizontal direction, and the third boss 26 is arranged above the bent part 44. Through the arrangement of the third boss 26 and the arrangement of the bent portion 44, rainwater can flow downwards along the bent portion 44, and rainwater or liquid is prevented from depositing and entering the interior of the box body.

Preferably, in the above embodiment, a gap is provided between the second boss 22 and the bottom surface of the third groove 43, and the absorbent paper 5 is laid in the gap. The gap can accommodate the residual liquid, and the liquid can be absorbed by the absorbent paper 5.

Preferably, as for the above embodiment, a fixing portion 411 is disposed on one side of the fifth boss 42 close to the oil chamber 3, a clamping groove 412 is disposed on a side surface of the fixing portion 411 close to the oil chamber 3, a clamping sheet 413 is correspondingly disposed on the sealing plate 23, and a top surface of the clamping sheet 413 is tightly attached to an inner wall of the clamping groove 412, so that the box cover 2 is clamped and connected with the oil-immersed transformer box 1.

Preferably, in the above embodiment, a joint between a top surface of the fixing portion 411 and a side wall close to the oil chamber 3 is provided with a first slope surface 414, a joint between a top surface of the clamping piece 413 and a bottom surface of the clamping piece 413 is provided with a second slope surface 415, and the first slope surface 414 and the second slope surface 415 have the same inclination direction.

In the above embodiment, the bottom surface of the first boss 21 is preferably completely attached to the highest surface of the bent portion 44.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an oil-immersed transformer totally enclosed structure which characterized in that: the oil-immersed transformer tank comprises an oil-immersed transformer tank body (1) and a tank cover (2), wherein the opening of the oil-immersed transformer tank body (1) is upward, an oil cavity (3) is formed in the oil-immersed transformer tank body (1), a tank edge (4) is arranged on the upper edge of the side wall of the oil-immersed transformer tank body (1), the tank cover (2) is matched with the tank edge (4), the tank cover (2) is arranged above the oil-immersed transformer tank body (1) in a covering mode, a first boss (21), a second boss (22) and a sealing plate (23) are arranged on the tank cover (2), a first groove (24) is formed between the first boss (21) and the second boss (22), a second groove (25) is formed between the second boss (22) and the sealing plate (23), a third groove (43) which is in plug-in fit with the second boss (22) is arranged on the tank edge (4), the extension of the first boss (21) is greater than the extension of the second boss (22).

2. The fully sealed structure of oil-filled transformer according to claim 1, characterized in that: the oil chamber is characterized in that a fourth boss (41) is arranged on one side, away from the oil chamber (3), of a third groove (43) on the box edge (4), a fifth boss (42) is arranged on one side, close to the oil chamber (3), of the third groove (43) on the box edge (4), the fourth boss (41) is matched with the first groove (24), and the fifth boss (42) is matched with the second groove (25).

3. The oil-filled transformer full-sealing structure according to claim 2, characterized in that: the first groove (24) comprises a first surface (241) which is perpendicular to the bottom surface of the first groove (24), a bottom surface which is perpendicular to the first surface (241), and a second surface (242) which is arranged at an acute angle with the bottom surface of the first groove (24).

4. The oil-filled transformer full-sealing structure according to claim 2, characterized in that: the edge of the box cover (2) is bent outwards to form a third boss (26), the extension length of the third boss (26) is larger than that of the first boss (21),

the box is bent downwards along the edge (4) to form a bent part (44), the bent part (44) and the horizontal direction are arranged at a preset included angle, and the third boss (26) is arranged above the bent part (44).

5. The fully sealed structure of oil-filled transformer according to claim 4, characterized in that: a gap is formed between the second boss (22) and the bottom surface of the third groove (43).

6. The oil-filled transformer full-sealing structure according to claim 2, characterized in that: fifth boss (42) are close to one side of oil pocket (3) is provided with fixed part (411), fixed part (411) are close to joint groove (412) have been seted up on the side of oil pocket (3), it is provided with joint piece (413) to correspond on closing plate (23), the top surface of joint piece (413) with the inner wall in joint groove (412) closely laminates, realizes case lid (2) with the joint of oil-immersed transformer box (1) is connected.

7. The oil-filled transformer full-sealing structure according to claim 6, characterized in that: the connecting part of the top surface of the fixing part (411) and the side wall close to the oil cavity (3) is provided with a first slope surface (414), the connecting part of the top surface of the clamping sheet (413) and the bottom surface of the clamping sheet (413) is provided with a second slope surface (415), and the inclination directions of the first slope surface (414) and the second slope surface (415) are consistent.

8. The fully sealed structure of oil-filled transformer according to claim 4, characterized in that: the bottom surface of the first boss (21) is completely attached to the highest surface of the bending part (44).

9. The oil filled transformer full seal structure of claim 5, characterized in that: and water absorption paper (5) is laid in the gap.