JPS6231454B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switchgear, and more particularly to a method of coupling an operating section of a shield breaker whose driving source is high-pressure air to a high-pressure tank which is its driving source, and an improvement thereof.

Gas-insulated equipment is becoming more popular as electricity demand increases and voltages become higher. However, due to problems such as substation land shortages and downsizing, it is necessary to reduce the interphase dimensions of disconnectors as much as possible. It is occurring. FIGS. 1 and 2 show structural diagrams of the operating section and the air tank connection section of a conventional shingle breaker. FIG. 1 is a front sectional view, and FIG. 2 is an AA sectional view thereof. That is, 1 in the figure
A control block for edge cutting control.
When a command is given to the control block 1, the control block 1 opens the cylindrical valve 3 of the operating section 2 and sends high-pressure air in the air tank 4 into the operating cylinder 5. The operating piston 6 is operated to open and close a not-shown section. In such a so-called pneumatically operated shield disconnector, a connecting pipe 7 is required to connect the air tank 4 that stores high-pressure air and the operating section 2 that sends this high-pressure air to the operating cylinder 5 and performs the operation. Become. Therefore, the cover 11 of the operating section 2 and the air tank 4 are provided with flanges 11a and 4a for connection, respectively, and are connected by a connecting pipe 7.

However, the conventional connecting pipe 7 connects the operating section 2 and the air tank 4 at the time of final assembly.
Moreover, when connecting, connect one end of the connecting pipe 7 to the air tank 4.
The ring-shaped flange 9 with the airtight O-ring 8 must be fitted onto the connecting pipe 7 while the flange 4a is pulled into the interior of the flange 4a, and the flange 9 and 4a must be connected to the operating part 2 by tightening bolts or the like. It won't happen. Further, the connecting pipe 7 is a tubular connecting portion 2a of the operating section 2.
The connecting tube 7 is inserted and connected to the connecting tube 7 through a sealing O-ring 2b, and in order to prevent the connecting tube 7 from moving in the left-right direction, the connecting tube 7 has a split flange that fits into a groove 7a provided on the outer periphery near the other end. 10 is required,
These flanges 9 and split flanges 10 must be tightened with bolts to the flange surface 4a of the air tank 4 and the flange 4a surface for connecting the connecting pipe 7 provided on the cover 11 of the operating section 2, respectively, and the tightening space is also limited. Therefore, a considerable distance La was required between the air tank flange surface and the operating section cover flange surface. The maximum width of the disconnector is generally the distance Lb between the air tank 4 and the operation cover 11.
Therefore, in order to satisfy the required performance and shorten the interphase distance, it is necessary to shorten the distance La.

The present invention has been made in view of the above circumstances, and an object of the present invention is to shorten the dimensions of the operating section and the air tank connecting section, and to obtain a compact disconnector with a reduced overall width. In order to achieve this object, the present invention has a structure in which a connecting pipe connecting the operating section and the air tank is inserted and connected to the operating section from the side of the air tank that does not face the operating section, passing through the air tank.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. FIG. 3 shows a connecting portion between the shield breaker operating section 2 and the air tank 4 according to an embodiment of the present invention;
FIG. 4 is a detailed view of the connecting pipe according to the invention. In the figures, the same reference numerals as in FIGS. 1 and 2 indicate the same parts. As shown in the figure, the connecting pipe 31 of the present invention connecting the operating part 2 and the air tank 4 has a hole 3 in the center.
1a, a fixing flange 31c welded to the pipe 31b so as to close the opening on one end of the pipe 31b, and a sealing flange 31d welded to the outer peripheral surface near the other end of the pipe 31b.
The flange 31c can be attached to the air tank 4 with bolts. Furthermore, instead of a conventional flange, a short ring-shaped joining flange 41 with a larger diameter than the pipe 31b is attached to the flange 4a position of the air tank 4, and a sealing flange is attached to the inner open end surface of this joining flange 41. O
Ring 42 is a fit.

The air tank 4 also has a connecting flange 41.
A flange 4 for fixing a connecting pipe having an inner diameter larger than the diameter of this joining flange 41 is attached to a side wall surface corresponding to the connecting flange 41.
3 is provided, and the diameter of the flange 31d is approximately the same as the outer diameter of the joining pipe 41,
The air tank 4 can be inserted from the flange 43 of the air tank 4 to the joining flange 41 side by penetrating the air tank 4. When such insertion is performed, the inner end surface of the joining flange 41 and the connecting pipe 31
The flange 31d of the connecting pipe 31 is in close contact with the flange 31d of the air tank 4 through an O-ring 42, and the flange 31c of the connecting pipe 31 is connected with the flange 4 of the air tank 4 through an O-ring 44.
3 with bolts, the air tank 4 is communicated with the inside and outside only through the hole 31a of the connecting pipe 31. At this time, since the tip of the connecting pipe 31 protrudes from the joining flange 41 to the outside, this protruding portion is attached to the cover 11 on the operating section 2 side.
is inserted into the connecting portion 2a of the operating portion 2 through the flange 11a. An O-ring 11 for sealing is provided inside the flange 11a and the connecting portion 2a.
b, 2b are provided, so that the joint portion of the connecting pipe 31 is completely sealed and maintained in an airtight state.

As described above, in this device having such a configuration, the open end side of the connecting pipe 31 is inserted from the side of the connecting pipe fixing flange 43 of the air tank 4. 44
The flange 43 is closely attached to the flange 43 to seal high pressure air. Also, the flange 31d has an O-ring 42
However, when the air tank 4 is at atmospheric pressure immediately after assembly, the seal is not yet sufficient, but when the air tank 4 is filled with high-pressure air, the air Due to the pressure difference between the tank 4 and the outside atmosphere, the flange 31d
A force acts to compress the flange 31d, and the O-ring 42 inside the flange 41 is well compressed and sealed. In addition, the connecting pipe 31 is connected to the air tank 4 by means of bolts.
Since the connecting pipe 31 is fixed to the flange 43 of the air tank 4 and held in the air tank 4, there is no movement of the connecting pipe 31 in the left-right direction due to vibrations or the like during operation of the shroud breaker. Therefore, the split flange 10 for fixing the connecting pipe in FIG.
A flange 41 having a diameter is provided inside the air tank 4, and a flange 31 provided on the outer circumference of the connecting pipe 31
Since the seal and the connecting pipe 31 can be held by simply bringing the flange into close contact with the flange d, there is no need for any space for tightening the flange to the air tank 4 and the cover 11 of the operating section, which is required in the past, and the distance La can be reduced. It can be made very short, and therefore the total width of the shield and disconnector can be shortened. Furthermore, even when it was necessary to disassemble or replace the connecting pipe, conventionally it had to be moved to the right side of the air tank 4, which required a great deal of maintenance, inspection time, and equipment, but according to the present invention, Since the connecting pipe can be replaced without moving the air tank 4, maintenance and inspection time can be greatly reduced.

In addition to the connecting pipes used in the present invention having the shape shown in FIG. 4, in order to absorb manufacturing errors between the flanges 31d and 31c, connecting pipes 3 as shown in FIG.
1, a part of the pipe 31b in the connecting pipe 31 is made into a flexible pipe 51, or the pipe 31b in the connecting pipe 31 is divided into two parts, 31b' and 31b'', as shown in FIG. 31d'' is made to slide, and a spring 61 is interposed between these two pipes 31d' and 31d'',
A structure in which the pipes 31b' and 31b'' are normally subjected to forces in opposite directions, and a sliding extensible pipe tip type that can absorb dimensional errors may also be used.

As described above, according to the present invention, the connecting pipe connection hole of the air tank is formed into a cylindrical flange whose end protrudes inward of the air tank, and an O-ring for shielding is interposed on the end surface of this flange inside the air tank. At the same time, the air tank is provided with a flange for inserting and fixing the connecting pipe on the wall surface corresponding to this connecting pipe connection hole, and the connecting pipe has a hole in the middle thereof, and a hole is provided at one end side of the connecting pipe to close the pipe line, and a flange is attached to the flange. A fixing flange is provided for fixing the connecting pipe, and a sealing flange is provided at an appropriate position on the other end of the connecting pipe, the side surface of which contacts the connecting pipe connection hole, and the connecting pipe is used for inserting and fixing the connecting pipe into the air tank. Pass through the flange to the connecting pipe connection hole side, and tighten the bolts to the flange for connecting pipe insertion and fixing, so that the sealing flange and the connecting pipe connection hole are in close contact to maintain airtightness, and the connection pipe is passed through the connecting hole to the outside. Since the protruding end of the connecting pipe is used to insert and connect to the operating unit, there is no bolted part for connecting the connecting pipe between the air tank and the operating unit, and therefore, these By reducing the total width of the disconnector, it is possible to reduce the distance between the two parts, and when disassembling and inspecting the connecting pipe, the connecting pipe can be attached and removed from the operating part. To provide a shield disconnector having excellent features such as being able to be replaced from the wall surface of the air tank on the side that does not face the air tank and therefore being able to be replaced without removing the air tank one by one, thereby significantly shortening maintenance and inspection time. I can do it.

[Brief explanation of the drawing]

Figures 1 and 2 are sectional views showing the joint between the operating part and the air tank of a conventional shield breaker, and Figure 3 shows the joint between the operating part and the air tank of the shield breaker according to the present invention. A sectional view, FIG. 4 is an enlarged detailed view of the connecting pipe in FIG. 3, and FIGS. 5 and 6 are views showing other embodiments of the connecting pipe according to the present invention. 1...Control block, 2...Operation unit,
4... Air tank, 11a, 41, 43... Flange, 2b, 11b, 42, 44... O ring,
11...Cover of operation section, 31...Connecting pipe, 31
a...hole, 31b...pipe, 31c, 31d...
...Flange, 51...Flexible pipe, 61...
Spring.

Claims (1)

[Scope of Claims] 1. A high-pressure tank storing high-pressure air and an operating section for opening and closing the sheath section are connected through a connecting pipe, and high-pressure air is supplied to the operating section as an operating source to operate the sheath section. In the disconnector for opening and closing, a pair of opposing holes are provided in the opposing walls of the high-pressure tank, one hole has a flange for sealing that protrudes into the tank, and the other hole has a flange for sealing. A flange for fixing the connecting pipe is provided, respectively, protruding from the outside of the tank, and the connecting pipe closes the pipe at one end of the pipe, and is connected and fixed in an airtight manner in close contact with the flange for fixing the connecting pipe. This connecting pipe is provided with a fixed flange for sealing, and when the connecting pipe is inserted into the hole of the high-pressure tank and fixed, it comes into close contact with the sealing flange of the high-pressure tank to keep the inside of the high-pressure tank airtight. A holding flange for sealing is provided protruding from the outer periphery, and a hole is provided between both flanges of the connecting pipe for communicating with the high pressure tank of the connecting pipe line, and the connecting pipe is configured to communicate with the high pressure tank. By inserting the pipe from the pipe fixing flange side to the sealing flange side and fixing both from the outside, an airtight structure can be maintained at the corresponding flanges of the connecting pipe and the high pressure tank, and the high pressure of the connecting pipe can be maintained. A shingle disconnector characterized in that high pressure air in the high pressure tank is supplied to the operating section through the hole of the connecting pipe by inserting a protruding end of the tank from the sealing flange side into the operating section. 2. The shear disconnector according to claim 1, wherein the connecting pipe is entirely a rigid tubular body. 3. The connector according to claim 1, wherein the connecting pipe is a rigid tubular body, and a part between the sealing flange and the closed end side is a flexible pipe, so that it can be expanded and contracted. Disconnector. 4. The connecting pipe is made into a rigid tubular body, and is divided into two parts between the sealing flange and the closed end side, and is slidably fitted and biased in the extension direction by a spring, so that it can be expanded and contracted. A shear breaker according to claim 1, characterized in that: