CN210325441U

CN210325441U - Oil supplementing device for transformer

Info

Publication number: CN210325441U
Application number: CN201921284013.0U
Authority: CN
Inventors: 谢坤
Original assignee: Guizhou Simate Intelligent Electric Co ltd
Current assignee: Guizhou Simate Intelligent Electric Co ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-04-14
Anticipated expiration: 2029-08-09

Abstract

The utility model discloses a transformer oil supplementing device, which comprises an oil bucket, an oil storage tank, an oil delivery pipe and an oil level gauge, wherein the oil bucket is connected with a first control valve in series and is arranged at the top of the oil storage tank; the oil storage tank is provided with an oil level gauge on the side surface, the bottom of the oil storage tank is communicated with an oil delivery pipe, the outlet of the oil delivery pipe at least comprises an oil delivery channel connected to the bottom of the oil storage tank and at least one air return channel connected to the top of the oil storage tank, and a second control valve is arranged at the inlet of the oil delivery channel; the bottom of the oil storage tank is surrounded with the oil delivery pipe and is also provided with a sealing sleeve with a positioning function. The utility model discloses do not contain electric power part, the reliability is high, only needs to set up oil pipe length as required earlier stage, and the later stage is used and need not adjust any parameter. By utilizing the pressure balance principle, the automatic stop of oil injection can be realized, the overflow of polluted equipment or the influence of less oil injection on the equipment can be prevented, and the generation of bubbles can be avoided by the sealed oil injection.

Description

Oil supplementing device for transformer

Technical Field

The utility model relates to a transformer technical field, in particular to transformer mends oily device.

Background

When the fully-sealed oil-immersed transformer is filled with oil, the height requirement of the oil level in the oil filling pipe must be higher than that of a high-voltage porcelain bushing of the fully-sealed oil-immersed transformer, otherwise flashover may occur due to oil shortage in the high-voltage porcelain bushing when the transformer runs; at present, a conical funnel is inserted into an upper opening of an oil filling pipe, an oil can is used for slowly filling oil into the funnel, and the oil level in the oil filling pipe cannot be seen clearly by naked eyes due to the fact that the inner diameter of the oil filling pipe is only 28-30 mm, so that the oil level in the oil filling pipe is often not added to a target oil level or overflows due to too much oil level, and oil on a box cover is obtained. Secondly, there are also disadvantages; the oil filling under the atmospheric pressure is difficult to avoid generating bubbles, the bubbles can be discharged after a long time, and the discharge of the bubbles causes the oil level in the oil filling pipe to drop, so that the oil filling operation needs to be carried out again.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an oil is mended under sealed environment, and the transformer oil supplementing device to injecing liquid level automatic stop.

The technical scheme of the utility model is that:

the transformer oil supplementing device comprises an oil hopper, an oil storage tank, an oil conveying pipe and an oil level gauge, wherein the oil hopper is connected with a first control valve in series and arranged at the top of the oil storage tank; the oil storage tank is provided with an oil level gauge on the side surface, the bottom of the oil storage tank is communicated with an oil delivery pipe, the outlet of the oil delivery pipe at least comprises an oil delivery channel connected to the bottom of the oil storage tank and at least one air return channel connected to the top of the oil storage tank, and a second control valve is arranged at the inlet of the oil delivery channel; the bottom of the oil storage tank is surrounded with the oil delivery pipe and is also provided with a sealing sleeve with a positioning function.

Furthermore, the number of the air return channels is more than two, and the air return channels are arranged around the oil transportation channel.

The oil delivery pipe comprises a thick-wall pipe and a thin-wall pipe, the thin-wall pipe is connected to the top end of the thick-wall pipe, an oil delivery channel penetrates through the middle of the thick-wall pipe, and an air return channel is formed in the peripheral wall of the thick-wall pipe around the thin-wall pipe.

Furthermore, the air return channels are connected to the air collecting pipe sleeve and then connected to the top of the oil storage tank through the air conveying pipe connected with the air collecting pipe sleeve.

Furthermore, a positioning step is arranged in the sealing sleeve to realize positioning connection.

Furthermore, a rubber sleeve is embedded in the sealing sleeve.

Furthermore, the front end of the rubber sleeve is provided with a chamfer inwards.

The utility model discloses an useful part lies in:

(1) utilize pressure balance principle, can realize the automatic shutdown oiling, prevent to spill over polluting equipment or annotate less and influence equipment, in case the liquid level arrives defeated oil pipe export, will block up return-air passage, carry automatic termination.

(2) The sealing connection of location is realized through sealed sleeve and transformer oil filling pipe, and the length design that only will stretch into is unanimous with the liquid level height that needs refuel alright, and any parameter need not adjusted in the later stage use, can avoid the bubble to produce moreover.

(3) The transformer does not contain any sensor or power component, has stable performance, strong reliability and low cost, and does not need to change the transformer.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic view of a top view of an oil pipeline.

In the figure: 1-oil hopper, 11-first control valve, 2-oil storage tank, 3-oil level gauge, 4-oil delivery pipe, 4 a-second control valve, 41-thick-wall pipe, 41 a-return gas channel, 42-thin-wall pipe, 42 a-oil delivery channel, 5-sealing sleeve, 51-rubber sleeve, 6-transformer oil filling pipe, 7-gas delivery pipe and 71-gas collecting pipe sleeve.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-3:

a transformer oil supplementing device comprises an oil bucket 1, an oil storage tank 2, an oil conveying pipe 4 and an oil level gauge 3, wherein the oil bucket 1 is connected with a first control valve 11 in series and is arranged at the top of the oil storage tank 2; the oil level gauge 3 is installed on the side surface of the oil storage tank 2, the bottom of the oil storage tank is communicated with an oil delivery pipe 4, the outlet of the oil delivery pipe 4 at least comprises an oil delivery channel 42a connected to the bottom in the oil storage tank 2 and at least one air return channel 41a connected to the top in the oil storage tank 2, and a second control valve 4a is arranged at the inlet of the oil delivery channel 42 a; 2 bottoms of oil storage tank center on defeated oil pipe 4 still is provided with sealed sleeve 5 of taking locate function, and sealed sleeve 5 is used for forming sealedly with transformer oil pipe 6, can set up the location step inside it and realize the location and connect, in order to increase the leakproofness, inlays the dress rubber sleeve 51 inside sealed sleeve 5, and the chamfer is inwards seted up to rubber sleeve 51 front end, is convenient for cup joint.

As a further preferable scheme, the number of the return air passages 41a is two or more, and the return air passages are arranged around the oil delivery passage 42a, and at this time, the oil delivery pipe 4 may have a structure including a thick-walled pipe 41 and a thin-walled pipe 42, the thin-walled pipe 42 is connected to the top end of the thick-walled pipe 41, the oil delivery passage 42a is formed through the middle of the thick-walled pipe 41, and the return air passages 41a are formed in the peripheral wall of the thick-walled pipe 41 around the thin-walled pipe 42. In order to reduce the resistance to return air, the return air channels 41a are connected to the air collecting pipe sleeve 71 and then connected to the top of the oil storage tank 2 through the air conveying pipe 7 connected to the air collecting pipe sleeve 71.

The working principle and the process are as follows: the cooling oil is injected into the oil storage tank through the oil hopper, the top of the gas delivery pipe cannot be submerged, the first control valve 11 is closed, the oil delivery pipe 4 extends into the oil filling pipe 6 of the transformer, and the sealing connection with the oil filling pipe 6 of the transformer for positioning is realized through the sealing sleeve, so that the oil delivery pipe is positioned, the length of the oil delivery pipe 4 extending into each time is ensured to be consistent, and the oil level height of the oil filling pipe is designed to be consistent with the oil level height of the oil filling pipe.

After the sealing connection is completed, the second control valve is opened, cooling oil enters the transformer from the oil delivery channel, gas in the transformer returns to the oil storage tank through the air return channel, pressure balance is achieved, once the liquid level reaches the outlet of the oil delivery pipe, the air return channel is blocked, the oil filling pipe of the transformer is sealed with the sealing sleeve, air cannot be discharged from the transformer, meanwhile, air cannot enter the oil storage tank 2 continuously, at the moment, the oil delivery channel cannot continue to convey under the pressure of the remaining air and the cooling oil in the transformer, and conveying is automatically stopped. When the oil level indicator 3 is no longer changed, indicating that delivery has terminated, the second control valve is closed. The oil pipe is slowly pulled out, and although part of oil still exists in the oil pipe, the oil pipe has small pipe diameter (the inner diameter is generally not more than 20mm) and short length (not more than 200mm), so that the liquid level in the transformer is raised by about 1-2mm above the limited liquid level at most, and the substantial influence is not caused.

It is required to explain that the utility model is used for mend oil, also adopt conventional method earlier with the transformer filling to about four fifths of ordinary volume, can not spill over this moment, the bubble of production also can eliminate very fast, then reuse the utility model discloses the filling can maximize like this and reduce the volume of oil storage tank, portable and operation.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a transformer mends oily device, includes oil bucket (1), oil storage tank (2), defeated oil pipe (4) and oil level gaugember (3), its characterized in that: the oil hopper (1) is connected in series with a first control valve (11) and arranged at the top of the oil storage tank (2); an oil level gauge (3) is installed on the side face of the oil storage tank (2), the bottom of the oil storage tank is communicated with an oil delivery pipe (4), an outlet of the oil delivery pipe (4) at least comprises an oil delivery channel (42a) connected to the bottom of the oil storage tank (2) and at least one air return channel (41a) connected to the top of the oil storage tank (2), and a second control valve (4a) is arranged at an inlet of the oil delivery channel (42 a); the bottom of the oil storage tank (2) surrounds the oil delivery pipe (4) and is further provided with a sealing sleeve (5) with a positioning function.

2. The transformer oil replenishing device according to claim 1, wherein: the number of the air return channels (41a) is more than two, and the air return channels are arranged around the oil conveying channel (42 a).

3. The oil supplementing device of the transformer according to claim 2, wherein: the oil delivery pipe (4) comprises a thick-wall pipe (41) and a thin-wall pipe (42), the thin-wall pipe (42) is connected to the top end of the thick-wall pipe (41), an oil delivery channel (42a) penetrates through the middle of the thick-wall pipe, and an air return channel (41a) is formed in the peripheral wall of the thick-wall pipe (41) around the thin-wall pipe (42).

4. The oil supplementing device of the transformer according to claim 3, wherein: the air return channels (41a) are connected to the air collecting pipe sleeve (71) and then connected to the top of the oil storage tank (2) through the air conveying pipe (7) connected with the air collecting pipe sleeve (71).

5. The oil replenishing device for the transformer according to any one of claims 1 to 4, wherein: and a positioning step is arranged in the sealing sleeve (5) to realize positioning connection.

6. The transformer oil replenishing device according to claim 5, wherein: and a rubber sleeve (51) is embedded in the sealing sleeve (5).

7. The transformer oil replenishing device according to claim 6, wherein: the front end of the rubber sleeve (51) is provided with a chamfer inwards.