CN211291894U

CN211291894U - Detection device

Info

Publication number: CN211291894U
Application number: CN202020145150.2U
Authority: CN
Inventors: 曹雪良; 谢艳娟
Original assignee: Legend Electric Shenyang Co ltd
Current assignee: Legend Electric Shenyang Co ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-08-18
Anticipated expiration: 2030-01-22

Abstract

The utility model discloses a detection apparatus for be used for secondary middleware of oil-immersed transformer, secondary middleware is including attaching to the first end of the body of the oil-immersed transformer that is provided with secondary winding, attaching to the second end of secondary terminal box and being restricted in the passageway between first end and the second end, and detection apparatus includes: a sealing member covering the opening of the first end portion and the opening of the second end portion of the secondary intermediate member to seal the passage; the valve is used for filling detection gas into the channel of the secondary middleware through the valve; and a container containing a liquid, in which a secondary intermediate member filled with a detection gas and sealed by the sealing member is immersed to detect whether the secondary intermediate member leaks the gas. Therefore, the problems of high finished product repair rate, long finished product production period and material waste caused by integral repair are solved, the finished product repair rate is reduced, the production period of the product is shortened, and the material waste caused by the integral repair is reduced.

Description

Detection device

Technical Field

The utility model relates to a detection area specifically relates to a detection device.

Background

In the prior art, a secondary intermediate member for connecting a secondary winding of an oil-immersed transformer such as an oil-immersed current transformer with a secondary junction box is generally a casting, but due to the problems of the casting itself and the influence in the welding process, when a body of the oil-immersed transformer provided with the secondary winding of the oil-immersed transformer, the secondary intermediate member and the secondary junction box are assembled into a finished product, there is often a phenomenon of repairing the whole product due to oil leakage of the secondary intermediate member in the leakage test process of the finished product, and most oil-immersed transformer manufacturers often have a situation of repairing the whole product due to oil leakage of the secondary intermediate member. Therefore, not only the whole production period of the product is prolonged, but also serious waste is caused, and meanwhile, the product quality has huge risks.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a detection device for detecting whether a secondary middleware of an oil-immersed transformer has a leakage point or not, and aims to solve the problems of high finished product repair rate, long finished product production cycle and material waste caused by integral repair in the prior art.

According to an aspect of an embodiment of the present application, there is provided a detection device for a secondary middleware of an oil-filled transformer, the oil-filled transformer including a body, the secondary middleware and a secondary terminal box, the body including a mailbox and a secondary winding disposed in the mailbox, the secondary middleware including a first end attached to the body of the oil-filled transformer, a second end attached to the secondary terminal box, and a passage defined between the first end and the second end, a cable connected to the secondary winding passing through the passage of the secondary middleware to connect the secondary winding to the secondary terminal box, and the passage of the secondary middleware allowing a sealing oil to be filled into the mailbox of the oil-filled transformer, the detection device including: the sealing component covers the opening of the first end part and the opening of the second end part of the secondary intermediate part to seal the channels, so that gas in the channels is prevented from leaking to the outside, the valve is arranged on the wall part limiting the channels of the secondary intermediate part, in the process of detecting whether leakage points exist in the secondary intermediate part, the channels of the secondary intermediate part are filled with detection gas through the valve, and the container is provided with an accommodating space, the accommodating space contains liquid, and the secondary intermediate part filled with the detection gas and sealed by the sealing component is immersed in the liquid in the container, so that whether the secondary intermediate part of the oil-immersed transformer leaks gas or not is detected.

In this way, when bubbles occur in the liquid in the container, it is determined that the secondary intermediate member has a gas leak, so that it is possible to quickly and accurately determine whether the secondary intermediate member has a leak point.

According to an exemplary embodiment of the present application, the sealing member includes a first sealing member that covers the opening of the first end portion of the secondary intermediate member, the first sealing member including: a first cover plate including a first sealing portion covering the opening of the first end portion; and a first connection portion extending from the first sealing portion and overlapping an edge of the opening of the first end portion, a first sealing ring disposed between the first end portion and the first cover plate and surrounding the opening of the first end portion, and a clamping device clamping the first connection portion of the first cover plate and the edge of the first end portion to fix the first cover plate to the first end portion.

According to an exemplary embodiment of the present application, the sealing member includes a second sealing member that covers an opening of the second end portion of the secondary intermediate member, the second sealing member including: a second cover plate including a second sealing portion for covering the opening of the second end portion; the second connecting part extends from the second sealing part and is overlapped on the edge of the opening of the second end part, wherein the second connecting part of the second cover plate is provided with at least one first through hole, and the edge of the second end part is provided with at least one second through hole; the second sealing ring is arranged between the second end part and the second cover plate and surrounds the opening of the second end part; and the fastener is used for fixing the second cover plate on the second end part in a mode that the fastener sequentially passes through the first through hole and the second through hole.

According to the exemplary embodiment of the application, when the oil-immersed transformer works, the sealing oil is filled into the channel of the secondary intermediate piece through the valve.

In the embodiment of the application, a detection device for detecting whether a leakage point exists in a secondary middleware of an oil immersed transformer is provided, so that the technical problems that in the prior art, the repair rate of an oil immersed transformer finished product is high, the production cycle of the finished product is long, and the material is wasted due to integral repair are solved, the technical effects of reducing the repair rate of the oil immersed transformer finished product, shortening the production cycle of the product and reducing the material waste due to integral repair are achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a sectional view showing an oil-filled current transformer after a secondary intermediate member, a body of the oil-filled current transformer, and a secondary junction box are assembled.

Fig. 2 is a schematic diagram showing a detection device for detecting whether the secondary middleware of the oil-immersed current transformer has a leakage point according to the utility model discloses a.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules or elements is not necessarily limited to those steps or modules or elements expressly listed, but may include other steps or modules or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic sectional view showing an oil-filled current transformer (hereinafter, simply referred to as a current transformer) after a secondary intermediate member, a body of the oil-filled current transformer, and a secondary junction box are assembled. As shown in fig. 1, the current transformer 1 includes a body 2 of the current transformer 1, the body 2 including a mailbox 6 and a primary winding 3 and a secondary winding 4 disposed in the mailbox 6; a secondary intermediate 7 for connecting the secondary winding 4 to the secondary junction box 5 and filling a tank 6 of the body 2 of the current transformer 1 with sealing oil via the secondary intermediate 7; and a secondary junction box 5 for characterizing the current of the secondary winding 4.

Specifically, as shown in fig. 1, the secondary intermediate member 7 includes a first end portion 8 attached to the body 2 of the current transformer 1, a second end portion 9 attached to the secondary junction box 5, and a passage 10 defined between the first end portion 8 and the second end portion 9. The cable connected to the secondary winding 4 passes through the passage 10 of the secondary intermediate member 7 to connect the secondary winding 4 to the secondary junction box 5. The channel 10 of the secondary intermediate piece 7 allows the tank 6 of the current transformer 1 to be filled with sealing oil. The secondary intermediate member 7 further comprises a valve 40 (shown in fig. 2) arranged adjacent to the first end portion 8 on the wall 11 defining the passage 10, via which valve 40 the passage 10 of the secondary intermediate member 7 is filled with sealing oil when the current transformer 1 is in operation to thereby fill the mailbox 6 of the current transformer 1 with sealing oil.

As further shown in fig. 1, the first end 8 of the secondary intermediate piece 7 includes an opening 81 and a rim 82 extending from the opening 81 and surrounding the opening 81, and the second end 9 of the secondary intermediate piece 7 includes an opening 91 and a rim 92 extending from the opening 91 and surrounding the opening 91.

As shown in fig. 1, after the secondary intermediate member 7, the body 2 of the current transformer 1 and the secondary junction box 5 are assembled into a finished product of the current transformer 1, if a problem of repairing an entire product due to a leakage point of the secondary intermediate member 7 occurs in a leakage test process of the finished product, an entire production cycle of the finished product is increased, and even the entire finished product is scrapped due to a defect of the secondary intermediate member 7, so that a serious waste is caused, and meanwhile, a huge risk is caused on product quality.

It can be seen that it becomes necessary to detect whether there is a missing point in the secondary intermediate member 7 before assembling the secondary intermediate member 7 with the body 2 of the current transformer and the secondary junction box 5, which can reduce the rework rate of finished products, shorten the production cycle of products, and reduce the waste of materials due to the overall rework.

Based on this, the application provides a detection device whether secondary middleware 7 that detects oily formula current transformer has the leak source, as shown in fig. 2, fig. 2 shows the basis the utility model discloses a detection device's whether secondary middleware for detecting oily formula current transformer has the leak source schematic diagram. The detecting device 20 includes a sealing member 30 which covers the opening 81 of the first end portion 8 and the opening 91 of the second end portion 9 of the secondary intermediate member 7 to seal the passage 10, thereby preventing the gas in the passage 10 from leaking to the outside; a valve 40 for filling the passage 10 of the secondary intermediate product 7 with a detection gas through the valve 40 in the process of detecting the secondary intermediate product 7; and a container 50 having an accommodating space which accommodates the liquid 60, the secondary intermediate member 7 filled with the detection gas and sealed by the sealing member 30 being immersed in the liquid 60 of the container 50 to detect whether the secondary intermediate member 7 leaks the detection gas.

Specifically, for example, the detection gas may be nitrogen, and the secondary intermediate member 7 may be filled with nitrogen, for example, 0.2Mpa nitrogen, via the valve 40.

In this way, when bubbles occur in the liquid 60 in the container 50, it is determined that the secondary intermediate 7 has a gas leak, so that it is possible to quickly and accurately determine that the secondary intermediate 7 has a leak point.

As further shown in fig. 2, the seal member 30 includes a first seal member 31 that covers the opening 81 of the first end portion 8 of the secondary intermediate member 7, and the first seal member 31 includes: a first cover plate 310, the first cover plate 310 including a first sealing portion 311 covering the opening 81 of the first end portion 8; and a first connecting portion 312 extending from the first sealing portion 311 and superposed on the rim 82 of the first end portion 8; a first sealing ring (not shown) disposed between the first end 8 and the first cover plate 310 and surrounding the opening 81 of the first end 8; and a clamping means 320 for clamping the first connection portion 312 of the first cover plate 310 to the rim 82 of the first end portion 8 to fix the first cover plate 310 to the first end portion 8.

The seal member 30 further includes a second seal member 32 which is closed over the opening 91 of the second end portion 9 of the secondary intermediate member 7, the second seal member 32 including: a second cover 320, the second cover 320 including a second sealing portion 321 for sealing the opening 91 of the second end 9; a second connecting portion 322 extending from the second sealing portion 321 and overlapping the edge 92 of the second end portion 9, wherein the second connecting portion 322 of the second cover plate 320 is provided with at least one first through hole 323, and the edge 92 of the second end portion 9 is provided with at least one second through hole 93; a second sealing ring (not shown) disposed between the second end 9 and the second cover plate 320 and surrounding the opening 91 of the second end 9; and a fastening member 324 for fixing the second cover 320 to the second end 9 by means of the fastening member 324 sequentially passing through the first and second through

holes

323 and 93. The fasteners 324 may be bolts, screws, or the like.

The sealing member 30 seals the secondary intermediate 7 in a sealed state when the secondary intermediate 7 is assembled with the main body 2 of the current transformer and the secondary junction box 5 into a finished product.

The above description is made for an oil-immersed current transformer as an example, but the detection device of the present application is not limited to be applied to a current transformer, but may be applied to other oil-immersed transformers, such as an oil-immersed voltage transformer.

The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A detection device for a secondary middleware of an oil immersed transformer, the oil immersed transformer comprising a body, the body comprising a mailbox and a secondary winding disposed in the mailbox, the secondary middleware comprising a first end attached to the body of the oil immersed transformer, a second end attached to the secondary terminal box, and a passage defined between the first end and the second end, a cable connected to the secondary winding passing through the passage of the secondary middleware to connect the secondary winding to the secondary terminal box, and the passage of the secondary middleware allowing the mailbox of the oil immersed transformer to be filled with sealing oil, the detection device comprising:

a sealing member that covers the opening of the first end portion and the opening of the second end portion of the secondary intermediate member to seal the passage to prevent the detection gas in the passage from leaking to the outside,

a valve provided on a wall portion of the passage defining the secondary intermediate member, the passage of the secondary intermediate member being filled with a detection gas via the valve in a process of detecting the secondary intermediate member, and

a container having an accommodating space containing a liquid, the secondary intermediate member filled with the detection gas and sealed by the sealing member being immersed in the liquid of the container to detect whether the secondary intermediate member leaks the detection gas.

2. The sensing device of claim 1, wherein the sealing member comprises a first sealing member that caps the opening of the first end of the secondary intermediate piece, the first sealing member comprising:

a first cover plate comprising a first sealing portion covering the opening of the first end portion; and a first connecting portion extending from the first sealing portion and overlapping a rim of the opening of the first end portion,

a first seal ring disposed between the first end and the first cover plate and surrounding the opening of the first end, an

A clamping device clamping the first connection portion of the first cover plate to the rim of the first end portion to secure the first cover plate to the first end portion.

3. The detecting device according to claim 1 or 2, wherein the sealing member includes a second sealing member that covers the opening of the second end portion of the secondary intermediate member, the second sealing member including:

a second cover plate including a second sealing portion covering the opening of the second end portion; and a second connection portion extending from the second sealing portion and overlapping the edge of the opening of the second end portion, the second connection portion of the second cover plate being formed with at least one first through-hole, the edge of the second end portion being formed with at least one second through-hole,

a second seal ring disposed between the second end and the second cover plate and surrounding the opening of the second end, an

And a fastening member for fixing the second cover plate to the second end portion in such a manner that the fastening member sequentially passes through the first through hole and the second through hole.

4. The detection device according to claim 1 or 2, wherein the channel of the secondary intermediate member is filled with the sealing oil via the valve when the oil-filled transformer is in operation.