JPH035012B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hydraulically operated three-phase one-tank gas shield disconnector.

[Technical background of the invention and its problems] The performance of gas shields and disconnectors has improved significantly in recent years, and those with the same rating as conventional ones are becoming smaller and require less operating force. From this background, 3
So-called three-phase, one-tank type gas shields and disconnectors, in which the phase dividers and disconnectors are housed in a single tank, have been manufactured, and are becoming more compact. On the other hand, as a method of obtaining operating force, so-called air operating mechanisms using compressed air have been widely used.

Figure 1 shows, in a side sectional view, an example of the configuration of a three-phase, one-tank, puffer-type gas sheath disconnector, which is operated by each phase and has a separate operating device attached to the sheath section of each of the three layers. It is something that In the figure, reference numeral 1 denotes a cylindrical metal tank that accommodates a three-phase shear and cut-off part, and the lower part of the tank is composed of an operating mechanism 4 consisting of a piston 2, a cylinder 3, a spring, etc., and is used to turn on or off. The holding device 5 that holds the handle, the operating rod 6 of the shingle section, the connecting part 8 that connects the insulating rod 7 and the operating mechanism 4 located on the extension thereof, and the connecting part 8 are housed in a metal tank filled with gas. An operating unit housing box 10 is attached which houses a small tank 9 and the like that communicates with each other and keeps the connecting portion airtight inside and outside the gas. The three-phase shear section consists of a phase 11 shown in cross section, a phase 12 not shown because it overlaps with this phase, and a phase 13 whose outline is only shown.
The fixed contact side member 14 of the shingle section 11 is supported and fixed by an insulator 15, and the movable contact side member 16 is connected to the operating rod 6, and the fixed part 17 and the insulator that fixed the fixed part 17 are connected to each other. It is supported by object 18. In addition, the air tank 28 that serves as the operation drive source is placed inside the storage box as shown in the figure, or placed outside to prevent the storage box from becoming too large, and guides air to the operation mechanism 4 through piping. .

During the shrinking operation, compressed air is sent from the filling port 19 to the cylinder 3 of the operating mechanism 4 through a control valve (not shown), thereby driving the piston 2 to the left in FIG. This movement drives the insulating rod 7 and the operating rod 6 downward through the connecting part 8, and at this time, the gas is compressed by the puffer cylinder 20 and the fixed piston 21 fixed to the end of the operating rod 7, and the gas is compressed. The gas is guided to the insulating nozzle 22 to extinguish the arc generated between the movable arc contact 23 and the fixed arc contact 24. Conductor 25 that connects the inside and outside of the disconnector
The conductor outlet 26 is insulated from the metal tank.
It is fixed by an insulating spacer 27 fixed to the metal tank and maintains airtightness inside and outside the metal tank. In such a conventional tank-type gas shield disconnector, the central axis of the operating mechanism 4 in the operating direction and the central axis of the shield disconnector 11 in the operating direction are at right angles. A large rotating connection must be provided for the change. In addition, the small tank 9 that accommodates the connection part becomes large, and as mentioned above, in the case of a switch that operates on each phase, the operating devices 4 must be prepared for three phases, so the operating device storage box is required. 10 has to be large, and in order to make the storage box 10 smaller, the air tank that serves as the driving source for the operating device 4 must be
In many cases, it has to be placed outside of that area, and as a result, it has the disadvantage that the cutter cannot be made smaller.

Against this background, in recent years there has been an increase in the number of hydraulic disconnectors equipped with a hydraulic operating mechanism, which can more easily obtain high pressure than compressed air and therefore allow the overall operating device to be made smaller. However, when compressed air is normally used, a compressor is prepared in a separate location within the substation, and the compressed air is guided through piping to a tank attached to the shatter breaker. In most cases, a compressor was not installed, but in the case of a hydraulically operated type, the hydraulic pump that acts as a compressor is small, and it must be installed directly on a shield or disconnector to prevent leakage of high hydraulic pressure. Therefore, depending on the arrangement, there is a drawback that the operating device storage box cannot be made smaller. Also,
Normally, three-phase, one-tank type gas disconnectors are often used as part of gas-insulated switchgear in combination with other disconnectors, grounding devices, instrument transformers, pipeline busbars, etc. For reasons such as arranging gas-insulated switchgear for several circuits close together without any gaps in order to reduce the amount of space required, it is desirable to be able to inspect the circuit breakers only from one side of the storage box. Therefore, it is necessary to be able to inspect or pull out some parts only from one side, and in the case of a cutter or disconnector with a hydraulic operation mechanism, that side is not necessary or It is necessary to have a surface where the compressor can be inspected and the hydraulic pump unit, etc. of the compressor can be removed in the unlikely event of a malfunction.

[Object of the Invention] The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to downsize the operating device storage box while accommodating all the members necessary for operation within the operating device storage box. An object of the present invention is to provide a hydraulically operated three-phase, one-tank type gas shield and disconnector that can be operated.

[Summary of the Invention] In order to achieve the above object, the present invention houses three layers of sheath cutter parts in a single tank, and also makes the drive direction of the shear cutter parts in a straight line with the operating machine. The storage box is compact by rationally arranging the accumulator and the hydraulic pump unit in the operating machine storage box, and inspection can be performed only from one side.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on FIG. 2. Note that the same parts as in FIG. 1 are designated by the same reference numerals, and the explanation thereof will be omitted. In the figure, a small tank 9 containing a holding device 5 is fixed to a lid 30 on the lower side of a metal tank 1. Further, a support portion 33 is fixed to this small tank 9,
This support part 33 has a connecting part 8 that connects a rod 31 that moves in the small tank 9 while keeping gas and air airtight and a rod 32 of the operating mechanism 4 that moves while keeping high pressure oil and air airtight. It is provided. Further, the operating mechanism 4 is fixed to the support section 33. The central axis 35 of the operating mechanism 4 in the operating direction is substantially aligned with the central axis 34 of the hemlock section in the operating direction. Further, numeral 36 is a high-pressure oil accumulator provided in the operating machine storage box 10, numeral 37 is a hydraulic pump unit, and numeral 38 is an openable/closable door for inspection.

FIG. 3 shows the arrangement inside the operating device storage box 10 in FIG. 2 (cross section taken along the line A-A in FIG. 2). In the figure, 50, 51, 52 are the second
These are the operating mechanisms of the fold sections 40, 41, and 42 in the figure, respectively. Each of these sheath sections 40, 41, 4
Reference numeral 2 denotes an operation mechanism 50 which is arranged in a triangular shape and has a cross-section or a cross-section at the vertex of a regular triangle or an isosceles triangle on the surface where the inspection door 38 is provided in the operation device storage box 10 having a rectangular cross section. is placed, and the inspection door 3
On the side of the surface 43 opposite to the surface on which the triangle 8 is provided, operating mechanisms 51 and 52 for the other wedge-shaped sections forming the base of the triangle are arranged so that the base and the surface 43 are parallel to each other. Also, hydraulic accumulator 36
are arranged between the operating mechanisms 51 and 52 and the surface 43, and a plurality of them may be stacked as shown in FIG. 2 depending on the capacity.

On the other hand, when viewed from the door 38, the hydraulic pump unit 37 is located next to the operating mechanism 50 of the phase edge section at the apex of the triangle and closer to the operating mechanisms 51 and 52 of the other phase edge sections. Place it in front so that at least one side faces the door 38.
Further, numeral 39 is a mounting plate for attaching a terminal board for a pressure gauge, pressure switches, opening/closing indicator of a shield breaker, auxiliary switch, etc., and is located on the surface of the door 38 and next to the hydraulic pump unit 37. Placed. Furthermore, the conductor outlet 26 of the metal tank 1 in which the blade and cut-out part is stored is provided on the surface 43 side, and the surface 43 side portion of the storage box 10 is connected to the end of the conductor outlet 26 and the metal tank 1. It is arranged between the outer diameter part and the outer diameter part.

With this configuration, the operating mechanism of each phase is arranged almost only directly under the edge of each phase, and there is no structure in which the operating mechanism protrudes horizontally as in the conventional example. The outer shape of the operating device storage box 10 can be made small, and the installation area can also be minimized. Further, by providing the accumulator 36 on the conductor outlet 26 side of the operating device storage box 10, even if the external shape of the storage box 10 is extended beyond the outer diameter of the metal tank 1 that accommodates the shingle cut portion, the conductor can be removed. Since there is no effect on the installation area up to the end of the outlet 26, it is possible to effectively use a place in the storage box 10 where it is relatively easy to create a space. Furthermore, since the hydraulic pump unit 37 can be placed facing the inspection door 38 side, it is possible to inspect it, and in the unlikely event that a problem occurs, other unrelated parts can be removed. It can be easily pulled out without removing it.

As mentioned above, the 3-phase, 1-tank type gas shield disconnector with this configuration has a 3-phase, 1-tank type gas shield disconnector, even if three-phase operating machines for each phase operation type are housed in a single operating machine storage box, the shield disconnection is The operating direction and the operating direction of the operating mechanism are the same direction, and there is no protrusion of rotating parts, etc., so the smallest operating mechanism can be prepared, and the accumulator 36 is relatively unnecessary for inspection. Since it is located far from the door 38 and in a place with a large space, the number of cylinders can be changed freely according to the number of operating duties of the shield disconnector, and inspection and replacement of the hydraulic pump unit 37 are easy. In addition to being able to make the operating unit storage box 10 of the smallest size, the installation area can be significantly reduced, and when combined with other equipment as a gas-insulated switchgear, it is easy to install or pull out. The space required for can also be significantly reduced.

In the above embodiment, the single-phase operation type three-phase 1
Although the explanation was given using a tank-type gas shutoff switch as an example, 3
A similar effect can be obtained in the case of the phase simultaneous operation type, and FIG. 4 shows a sectional view of the interior of the operating device storage box 10 in this configuration.

In the figure, 53 is the wrinkle section 4 indicated by the broken line.
It is a single operating mechanism that operates 0, 41, and 42 all at once. In addition, the arrangement of the accumulator 36, hydraulic pump unit 37, and mounting plate 39 for mounting pressure gauges, indicators, etc., is the same as the arrangement for the operating mechanism of each phase explained in FIG. 3 above. This can be done by considering the projection position from the top surface of the part. By adopting such an arrangement, the same effect as that shown in FIG. 3 can be obtained.

[Effects of the Invention] As explained above, according to the present invention, there is provided a hydraulically operated three-phase operating device storage box that can accommodate all the members necessary for operation inside the operating device storage box and downsize the operating device storage box. We can provide a one-tank type gas shield and disconnector.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional three-phase, one-tank type gas shield disconnector, Fig. 2 is a side sectional view showing an embodiment of the present invention, and Fig. 3 is an arrow AA in Fig. 2. 4 is a cross-sectional view showing another embodiment of the present invention. 1...Metal tank, 4, 50, 51, 52, 5
3... Operating mechanism, 10... Operating device storage box, 36...
...Accumulator, 37...Hydraulic pump unit, 38...Inspection door, 40, 41, 42...Sheath section.

Claims (1)

[Scope of Claims] 1. An operating device storage box with a substantially rectangular cross section provided at the bottom of the tank, in which three-phase cross sections are arranged so that each phase forms a triangle in a single tank. A door that allows inspection of the interior of the operating device storage box is provided on the side surface of the apex of the triangle when viewed from above, and the other surface of the operating device storage box opposite to the surface provided with this door and the An accumulator is arranged between the base of the triangle and the other surface so that the bases of the triangle are parallel to each other, and at least one side of the accumulator is located next to the sheath section located at the apex of the triangle. The hydraulic pump unit is placed on the side of the door, and components such as pressure gauges, pressure switches, open/close indicators, and terminal boards for auxiliary switches are placed on the remaining side of the door. A three-phase, one-tank type gas shield and disconnector, characterized in that the direction of operation of the section and the direction of operation of the operating mechanism are the same. 2. The operation method is a single-phase operation type, and the central axis through which the cutter and cutter operate and the central axis through which the operating device operates are arranged substantially in a straight line. Phase 1 tank type gas shield disconnector. 3. The three-phase, one-tank type gas shield disconnector according to claim 1, wherein the operation method is a three-layer all-in-one operation type. 4 Each phase is a regular triangle or two
The three-phase, one-tank type gas sheath disconnector according to claim 1, which is arranged to form an equilateral triangle.