KR20130076296A

KR20130076296A - Reinforcement members for protecting elbow connector of ground transformer

Info

Publication number: KR20130076296A
Application number: KR1020110144824A
Authority: KR
Inventors: 한창대; 박상완; 김환승; 이용길
Original assignee: 한국전력공사
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2013-07-08

Abstract

PURPOSE: A reinforcing member for ground transformer elbow protection is provided to suppress arc generation by closely maintaining connection between an elbow of an extra-high voltage ground cable terminal and a bushing insert of a ground transformer. CONSTITUTION: A reinforcing band (40) for elbow protection is formed of a main body part (41) and a holding plate (42). The holding plate is fixed on a connection terminal site between a bushing insert and an elbow. The main body part extends the holding plate. The reinforcing band for the elbow protection has flexibility and elasticity. A reinforcing band cover for the elbow protection is formed of a transparent and hard material.

Description

Reinforcement members for protecting elbow connector of ground transformer}

The present invention relates to a reinforcing member for protecting the ground transformer elbow. More specifically, it is a transparent and hard material, and two projections protruding from one side are connected to the elbow protection reinforcement band to open and close, easy to attach and detach the reinforcement band, and a bushing insert generated by the ejected insulating oil. The present invention relates to an elbow protection reinforcement member for a ground transformer having a structure that facilitates visual inspection such as the protection of the elbow from deterioration and separation, as well as the bushing insert and the elbow state, and the elbow clearance measurement.

In general, the ground transformer is a device that draws the underground cable of the extra-high pressure, denatures it, and draws it out to the high voltage cable for power receiving. In this case, a bushing insert is usually installed in the enclosure of the ground transformer, and an elbow is mounted at an end portion of the underground cable coming up from the ground. Then, the probe insertion hole provided in the elbow and the probe rod installed through the bushing from the ground transformer are interconnected so that the underground cable is connected to the ground transformer.

FIG. 1 is a side view illustrating an elbow coupling of a conventional general ground transformer, in which an elbow 20 positioned at a terminal of the high voltage underground cable 21 is connected to the bushing insert 12 with respect to the ground transformer. As shown, a bushing fixing part 11 is provided in the opening formed in the enclosure 10 of the ground transformer, and a bushing insert 12 which is an insulator is attached to the bushing fixing part 11. Inside the bushing insert 12, a conductive rod 13 connected to a transformer inside the enclosure 10 is installed to penetrate therethrough, and a probe insertion hole is formed at the tip of the conductive rod 13.

The elbow 20 is provided in the terminal of the extra-high voltage underground cable 21 coming up from the ground as shown as an insulator. The inside of the elbow 20 is a connector 22 which is connected to the core of the underground cable 21 is installed, the probe rod 23 is connected to the connector 22 of the elbow 20 of the bushing insert 12 It is connected to the probe insertion port and is connected to the underground cable. In Fig. 1, reference numeral 24 denotes a handle of an elbow, and 25 denotes a ground terminal.

To ensure the connection between the extra high pressure side bushing insert of the ground transformer and the extra high voltage cable side elbow, the extra high pressure ground until the bottom surface 26 of the elbow 20 and the bottom surface 14 of the bushing insert 12 come into contact with each other. The cable side elbow is inserted into the extra high pressure side bushing insert.

In the conventional ground transformer elbow connection, power is supplied by the sliding contact between the ground transformer enclosure side bushing insert and the extra high voltage cable side elbow. However, even if the elbow connection by the sliding contact is normal, the surrounding vibration Due to excessive use for a long time, fine separation phenomenon occurs in the elbow connection part.

In addition, when the insulating oil contacts the rubber parts of the bushing insert 12 and the elbow 20 due to the ground transformer insulating oil ejection, chemical reaction with fine dust occurs, and at this time, the bushing insert 12 and the elbow 20 are generated. In addition to deforming the rubber component of the) can be expected to leave the elbow connection.

In this way, when the separation of the elbow connection occurs, the connection may be deteriorated and the ground transformer may be damaged.Insulating oil may cause the separation of the elbow connection due to the separation and vibration caused by the deformation of the bushing insert 12 and the elbow 20. Due to this, deterioration of the arc and burnout damage of the ground transformer occurs.

Due to such deformed and deteriorated elbows and bushing inserts, enormous investment costs are incurred due to ground transformers and elbow replacements. A lot of manpower and time is being spent checking for elbow clearance.

On the other hand, according to the patent application No. 10-2010-0094093 has been introduced the invention related to the "ground transformer elbow connection measuring device" as illustrated in Figure 2, the measuring device 30 has a long bar-shaped body (31) and the vertical end 32 provided at the front end of the body 31, the slider slidable 33 along the longitudinal direction of the body 31, the measuring handle provided at the rear end of the body 310 ( However, this measuring device is a mechanism that only measures the elbow connection state of the ground transformer, and it is an elbow play against deformation of the elbow and bushing insert rubber components due to the generation of organic acid due to the injection of insulating oil, and also due to vibration. There is no such effect as fundamentally preventing elbow clearance, and there is no effect of preventing the insulating oil from being dropped and falling onto the elbow and bushing insert.

In particular, the general cover installed at the secondary bushing cab of the ground transformer or the connecting wire or the exposed part of the ground transformer is used to prevent the line failure caused by the electric shock and external contact of the human body. Discomfort to remove the kava has arisen.

Accordingly, the present invention is to solve the problem as in the prior art to secure the connection between the elbow of the special high voltage underground cable terminal to the bushing insert of the ground transformer to ensure the connection between them, to keep the connection closely for a long time to suppress the occurrence of arc In addition, it is possible to prevent burnout of the elbow, and to provide a reinforcing member for protecting the ground transformer elbow so that the coupling between the bushing insert and the elbow does not dismantle even in a collision of the vehicle.

The ground transformer elbow protection reinforcing member of the present invention has a stiffening piece that is pressurized and fixed to the connecting terminal portion of the bushing insert and the elbow at each end, and a long hole that can be connected to the elbow reinforcement band cover to the body portion extending these locking pieces Elbow protective reinforcing band formed of at least two or more, the housing is made of a transparent and rigid material as a whole to cover the elbow protective reinforcing band on the upper surface of the elbow and handles and protrusions along the side of the housing It is characterized by consisting of a reinforcement band cover for opening and closing the elbow is formed.

The ground transformer elbow protection reinforcing member according to the present invention has the effect of preventing the deterioration due to the arc caused by the departure of the bushing insert and the elbow deformation due to the insulating oil ejection, the elbow connection due to the vibration, the leakage current and damage of the ground transformer. There is.

In addition, there is an effect that can reduce the enormous investment cost due to the ground transformer and elbow replacement due to deformation and deteriorated elbow and bushing insert.

In addition, the ground transformer elbow protection reinforcement member of the present invention as an insulating material anyone can be easily introduced in the field of the live state, it is convenient to use without training the new method of the operator, there is an advantage to improve the construction quality.

1 is a side view of a state in which an elbow of a conventional general ground transformer is coupled to a bushing insert.
2 is a side view of a conventional ground transformer elbow connection measuring apparatus.
Figure 3 is a perspective view of the elbow protection reinforcement band in the ground transformer elbow protection reinforcement member of the present invention.
Figure 4 is a perspective view of the elbow protection reinforcement band cover in the ground transformer elbow protection reinforcement member of the present invention.
Figure 5 is a side view of the installation state applying the reinforcing member for protecting the ground transformer elbow according to the present invention to the elbow and the bushing insert.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 of the accompanying drawings shows a perspective view of the elbow protection reinforcement band of the elbow protection reinforcing member of the ground transformer elbow protection according to the present invention, Figure 4 shows a perspective view of the reinforcing band cover for elbow protection, Figure 5 is a ground transformer according to the present invention Side view showing the installation condition of elbow protection reinforcement member applied to elbow and bushing insert.

The ground transformer elbow protection reinforcement member of the present invention is composed of an elbow protection reinforcement band 40 as shown in FIG. 3 and an elbow protection reinforcement band cover 50 as shown in FIG. 4. The elbow protection reinforcement band 40 is composed of a flat body portion 41 having a narrow central portion and an enlarged area to reach both ends, and a locking piece 42 bent in the same direction at both ends. .

The handle 43 is formed to protrude from the surface of the central portion of the main body portion 41, and at least two long holes 44 are formed in the portion adjacent to the upper portion.

The main body portion 41 having an overall flat structure may cover one side of the bushing insert 12 and one side of the elbow 20 which are installed in the ground transformer enclosure connected to each other as illustrated in FIG. 5. It is formed to a length that can be, and the engaging pieces 42 formed on both ends are each caught by the bushing fixing portion 11 of the bushing insert 12, the engaging pieces 42 formed on the other end portion The ground terminal 25 of the elbow 20 is caught. Therefore, the bushing insert 12 and the elbow 20 are firmly connected as a whole.

The elbow protection reinforcement band 40 according to the present invention is flexible, has elasticity, and is made of an insulating material to promote worker safety. In particular, it is desirable to have a structure that does not change according to the climate, has sufficient dielectric strength, has a strong mechanical strength, has a small change in performance, and can be constructed even at an elbow connection portion to which a special high voltage is applied.

Meanwhile, the elbow protection reinforcement band cover 50 according to the present invention as illustrated in FIG. 4 is entirely transparent to cover the elbow protection reinforcement band 40 at the top of the elbow 20 as shown in FIG. 5. The upper surface of the housing 41 is formed in a round shape so as to play a roof role, but at least two curved protrusions 52 are formed on one side thereof in opposite directions. Along the side surface, the handle 53 for opening and closing the cover 50 is formed long.

In order to cover the elbow protection reinforcement band cover 50 according to the present invention to cover the elbow protection reinforcement band 40 on the upper surface of the bushing insert 12 and the elbow 20, the protrusions 52 to the reinforcement band ( 40 may be installed in the inserted state in each of the long holes 44 formed on the side, and the cover 40 can be opened and closed in the vertical direction by the handle 53 around the protrusion 52.

The elbow protection reinforcement band cover 50 is preferably made of a transparent and hard material, the two projections protruding on one side is connected to the elbow protection reinforcement band can be opened and closed, the reinforcement band and detachable, In addition, it is formed to facilitate the visual inspection such as the bushing insert, elbow deterioration and detachment and the condition of the bushing insert and elbow and the elbow clearance, which may be caused by the ejected insulating oil.

10 ---- ground transformer enclosure
11 ---- Bushing High Government
12 ---- Bushing Insert
13 ---- Challenge Rod
14 ---- bottom surface
20 ---- Elbow
21 ---- underground cable
22 ---- connector
23 ---- probe
24 ---- handle
25 ---- Ground Terminal
26 ---- bottom surface
30 ---- Measuring device
31 ---- body
32 ---- vertical end
33 ---- slider
34 ---- Measuring handle
40 ---- Elbow protection reinforcement band
41 ---- Body
42 ---- hanging piece
43 ---- handle
44 ---- Longman
50 ----- Elbow protection reinforcement band cover
51 ---- housing
52 ---- protrusion
53 ---- handle

Claims

Reinforcing band for elbow protection and the elbow protection reinforcing band cover is formed in the main body portion that extends the locking piece to the pressing portion of the bushing insert and the elbow connection terminal portion at each end is connected to the elbow reinforcement band cover, and It consists of a housing made of transparent and solid material so as to cover the elbow protection reinforcement band on the upper surface of the elbow, and an openable elbow protection reinforcement band cover having a handle and a protrusion formed along the side of the housing. Ground transformer elbow protection reinforcement member.

The ground transformer elbow protection reinforcement according to claim 1, wherein the main body has a narrow central portion and an enlarged area to reach both front ends, and the locking piece is bent in the same direction at both front ends of the main body. absence.

The ground transformer elbow protection reinforcement member according to claim 1, wherein a handle protrudes from the surface of the central portion of the main body and at least two long holes (44) are formed at a portion adjacent to the upper portion.

The elbow protection reinforcement member according to claim 1, wherein the elbow protection reinforcement band is flexible, has elasticity, and is made of an insulating material to promote worker safety.

According to claim 1, The elbow protection reinforcement band cover is made of a transparent and solid material as a whole to cover the elbow protection reinforcement band in the upper portion of the elbow, the upper surface of the housing is rounded to serve as a roof It is manufactured in a shape, at least two curved protrusions formed in one side opposite to each other, the ground is characterized in that the handle is formed long to open and close the cover along the other side Reinforcing member for transformer elbow protection.

According to claim 5, The elbow protection reinforcement band cover is installed in the state that the projections are respectively inserted into the long hole formed on the side of the reinforcement band, the opening and closing the cover in the vertical direction by the handle around the projections. Ground transformer elbow protection reinforcement member, characterized in that it can be.