CN219810575U

CN219810575U - Sealing device for mutual inductor detection

Info

Publication number: CN219810575U
Application number: CN202320888492.7U
Authority: CN
Inventors: 李松; 饶青山; 陈庆; 李明
Original assignee: Qingyan Electrical Wuhan Co ltd
Current assignee: Qingyan Electrical Wuhan Co ltd
Priority date: 2023-04-19
Filing date: 2023-04-19
Publication date: 2023-10-10
Anticipated expiration: 2033-04-19

Abstract

The utility model discloses a sealing device for detecting a transformer, which is used for pressurizing an expander of the transformer and comprises the following components: the assembled sealed container comprises two bottom plates, namely split plates and a container main body; the two bottom plates are arranged on two sides of the throat of the expander in a split manner along the horizontal direction, and the adjacent side edges are bent downwards to form connecting edges; the connecting edges of the two bottom plates are mutually attached and fastened together through bolts to form a bottom plate structure surrounding the throat; the bottom of the container main body is provided with an opening, the opening is provided with a flange in the horizontal direction, the lower surface of the flange is attached to the upper surface of the bottom plate structure and is fixedly connected with the bottom plate structure through bolts so as to enclose and contain the expander; the water supply pressurizing assembly is connected with the joint on the bottom plate structure through a pipeline and is used for injecting water into the assembled sealed container and pressurizing the assembled sealed container. The device adopts liquid such as water to transfer pressure, so that the pressure is more balanced and adjustable; and the pressure is easier to set to the maximum value, so that the pressure release sheet is prevented from being damaged due to overlarge pressure.

Description

Sealing device for mutual inductor detection

Technical Field

The utility model relates to the field of power detection equipment, in particular to a sealing device for detecting a transformer.

Background

The transformer is an important device in the power system and is used for isolating and detecting the high-voltage line. The transformer mainly comprises a primary winding, a secondary winding, a wiring board, a porcelain bushing, an oil tank, an expander and the like. Since a large amount of heat is generated during operation, the inside thereof is filled with insulating oil for cooling. Because the transformer is complex in structure, it is compared with the need to carry out the leakproofness test to the transformer to detect whether it has leakage.

The transformer is generally equipped with an expander in the prior art because the insulating oil therein is significantly expanded and contracted due to the large variation of the operating temperature. The expander is typically a metallic bellows structure having some collapsible capacity. Therefore, in the tightness test, a mechanical clamp is generally used to clamp and pressurize the upper and lower end caps of the expander, and the typical design is adopted in chinese patent CN 214702631U.

But with mechanical structures, the pressure is difficult to control precisely and the maximum threshold is difficult to set. In the prior art, the top cover of the expander is usually designed as a pressure release sheet, and the pressure release sheet is broken at a notch when the pressure exceeds a threshold value so as to avoid damage to other parts of the transformer caused by overlarge pressure; the existing pressurizing mode easily exceeds the maximum threshold value, so that the pressure release sheet is damaged.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model is to solve the technical problem that the pressure of the pressurization structure of the existing clamping expander is difficult to control.

In order to achieve the above object, the present utility model provides a sealing device for detecting a transformer for pressurizing an expander of the transformer, comprising:

the assembled sealed container comprises two bottom plates, namely split plates and a container main body; the two bottom plates are arranged on two sides of the throat of the expander in a split manner along the horizontal direction, and the adjacent side edges are bent downwards to form connecting edges; the connecting edges of the two bottom plate split are mutually attached and fastened together through bolts to form a bottom plate structure surrounding the throat; an opening is formed in the bottom of the container main body, a flange plate in the horizontal direction is arranged at the opening, the lower surface of the flange plate is attached to the upper surface of the bottom plate structure and is fixedly connected with the bottom plate structure through bolts so as to enclose and accommodate the expander;

the water supply pressurizing assembly is connected with the joint on the bottom plate structure through a pipeline and is used for injecting water into the assembled sealed container and pressurizing the assembled sealed container.

The utility model further improves that the container main body is cylindrical, the top of the container main body is provided with an exhaust port, and the exhaust port is provided with a plug.

The utility model is further improved in that the contact area between the connecting edge of the bottom plate split and the throat is arc-shaped; and a sealing gasket is arranged on the contact surface of the connecting edge, the throat pipe and the other connecting edge.

The utility model is further improved in that the contact surface of the flange plate and the bottom plate structure is provided with a sealing gasket.

The utility model is further improved in that the water supply pressurizing assembly comprises a water pump and a water tank; and a check valve is arranged at the outlet of the water pump.

A further improvement of the utility model is that the pipeline is provided with a water pressure gauge.

A further development of the utility model consists in that the line is provided with a pressure piston which is driven by a pressure piece.

A further improvement of the utility model is that the pipeline is provided with a pressure relief valve.

The device provided by the utility model has the following technical effects: the pressure is transferred by adopting liquid such as water, so that the pressure is more balanced and adjustable; and the pressure is easier to set to the maximum value, so that the pressure release sheet is prevented from being damaged due to overlarge pressure.

The conception, specific structure, and technical effects of the present utility model will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present utility model.

Drawings

FIG. 1 is a schematic view of a construction of a splice-type sealed container of the present utility model;

FIG. 2 is a schematic cross-sectional view of a splice-type containment vessel of the present utility model;

fig. 3 is a schematic view of a water supply pressurizing assembly in the present utility model.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

Some exemplary embodiments of the utility model have been described for illustrative purposes, it being understood that the utility model may be practiced otherwise than as specifically shown in the accompanying drawings.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a sealing device for detecting a transformer, including: a splice closure 10 and a water supply pressurizing assembly. The sealing device of the present embodiment uses an expander that accommodates a transformer and pressurizes the expander to detect whether insulating oil of the transformer leaks.

The splice-type sealed container 10 includes two bottom panel segments 11 and a container body 12. The two bottom plate split pieces 11 are arranged on two sides of the throat 51 of the expander 50 along the horizontal direction, and the adjacent side edges are bent downwards to form the connecting edges 13. Semicircular notches are formed on two adjacent side edges of the two bottom plate split 11, and the arc radius of the notches is matched with the outer diameter of the throat of the expander 50. In the installation process, the upper surfaces of the two bottom plate split 11 are flush, and the connecting edges 13 are mutually attached and fastened together through bolts to form a bottom plate structure surrounding the throat 51. The connecting edge 13 is curved in the semicircular notch area of the bottom plate split 11 so as to be attached to the throat 51. The contact surface of the connecting edge 13 with the throat 51 and the other connecting edge 13 is provided with a gasket.

The two-piece floor split 11 may be formed by CNC cutting processing using an aluminum alloy in order to secure sealing performance. The two bottom plate split pieces 11 can be processed in a pairing mode, the connecting edge 13 is processed first, then the two bottom plate split pieces 11 are fastened together through bolts, and then the upper surface of the bottom plate structure and the curved surface contacted with the throat 51 are processed through a lathe or a milling machine.

The bottom of the container main body 12 is provided with an opening, a flange 14 in the horizontal direction is arranged at the opening, and the lower surface of the flange 14 is attached to the upper surface of the bottom plate structure and is fixedly connected with the bottom plate structure through bolts so as to enclose and accommodate the expander 50. The container main body 12 is cylindrical, the top of which is provided with an exhaust port, and the exhaust port is provided with a plug 15. The contact surface of the flange 14 with the base plate structure is provided with a gasket.

As shown in fig. 2 and 3, the water supply pressurizing assembly is connected with the joint 16 on the bottom plate structure through a pipeline, and is used for injecting water into the split type sealed container 10 and pressurizing the water. From the joint 16 to the outlet of the water pump 21, a relief valve 26, a water pressure gauge 23, a pressurizing piston 24 and a check valve 22 are provided in this order on the pipeline.

The water pump 21 is used for pumping water from the water tank and injecting water into the assembled sealed container 10 after installation through a pipeline. During water supply, the plug 15 of the container body 12 needs to be opened, and the water pump and the plug 15 are turned off after overflow is observed. A check valve 22 connected to the outlet of the pump 21 prevents water from flowing back to the pump.

And (5) pressurizing after water injection is completed. In this embodiment, water is used as the medium to conduct pressure, which is more uniform. In this embodiment, a pressurizing piston 24 is connected in series on the pipeline, the end of the piston rod of the pressurizing piston is upward, and a pressing block 25 can be installed on the top of the piston rod. The output water pressure can be adjusted by adjusting the weight of the pressing block 25, and the weight of the pressing block 25 can be flexibly adjusted according to requirements. The pressure in the pipeline is consistent with the pressure in the assembled sealed container 10, and the pressure in the expander is equal to the pressure output by the pressurizing piston 24 due to the static pressure.

The actual water pressure in the pipeline and the spliced sealed container 10 can be observed through the water pressure gauge 23 on the pipeline, so that the weight of the pressing block 25 is adjusted. In order to prevent the pressure release piece of the expander 50 of the transformer from being broken, the pipeline is further provided with a pressure release valve 26. When the water pressure in the line is greater than a threshold, the relief valve 26 opens the drain.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A sealing device for detecting a transformer for pressurizing an expander of the transformer, comprising:

the assembled sealed container (10) comprises two bottom plate split pieces (11) and a container main body (12); the two bottom plate split pieces (11) are arranged on two sides of a throat (51) of the expander (50) along the horizontal direction, and adjacent side edges are bent downwards to form connecting edges (13); the connecting edges (13) of the two bottom plate split sections (11) are mutually attached and fastened together through bolts to form a bottom plate structure surrounding the throat pipe (51); an opening is formed in the bottom of the container main body (12), a flange plate (14) in the horizontal direction is arranged at the opening, and the lower surface of the flange plate (14) is attached to the upper surface of the bottom plate structure and fixedly connected with the bottom plate structure through bolts so as to enclose and contain the expander (50);

the water supply pressurizing assembly is connected with the joint on the bottom plate structure through a pipeline and is used for injecting water into the assembled sealed container (10) and pressurizing the water.

2. The sealing device for detecting the mutual inductor according to claim 1, wherein the container main body (12) is cylindrical, the top of the container main body is provided with an exhaust port, and the exhaust port is provided with a plug (15).

3. A sealing device for detecting a mutual inductor according to claim 1, characterized in that the area where the connecting edge (13) of the bottom plate split (11) contacts the throat (51) is arc-shaped; the contact surface of the connecting edge (13) with the throat (51) and the other connecting edge (13) is provided with a sealing gasket.

4. A sealing arrangement for detecting a transformer according to claim 1, characterized in that the contact surface of the flange (14) with the base plate structure is provided with a gasket.

5. A sealing device for detecting a mutual inductor according to claim 1, characterized in that the water supply pressurizing assembly comprises a water pump (21) and a water tank; and a check valve (22) is arranged at the outlet of the water pump (21).

6. The sealing device for detecting the mutual inductor according to claim 5, wherein a water pressure gauge (23) is arranged on the pipeline.

7. The sealing device for detecting the transformer according to claim 5, wherein a pressurizing piston (24) is mounted on the pipeline, and the pressurizing piston (24) is driven by a pressing block (25).

8. The sealing device for detecting the transformer according to claim 5, wherein a pressure release valve (26) is arranged on the pipeline.