JPS60117515A - 3-phase 1-tank type gas breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

[Technical background of the invention and its problems] The performance of gas circuit breakers has improved significantly in recent years, and those with the same rating as conventional gas circuit breakers are becoming smaller and require less operating force. In view of this, so-called three-phase, one-tank type gas circuit breakers, in which the circuit breakers for three phases are housed in a single tank, have been manufactured, and are becoming increasingly smaller. 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 is a side sectional view showing an example of the configuration of a three-phase one-tank buffer type gas breaker operated by each phase, in which a separate operating device is attached to each of the three phases' breaker parts. . In the figure, 1 is a cylindrical metal tank that houses the cutoff parts for three phases, and the lower part of the tank is composed of an operating mechanism 4 consisting of a piston 2 and a cylinder 3, a spring, etc., and a holding device that maintains the closed or shut off state. 5. A connecting part 8 that connects the operating rod 6 of the cutoff part and the insulating rod 7 on its extension to the operating mechanism 4; housing the connecting part 8, communicating with the inside of a metal tank filled with gas, and connecting the connecting part; An operating machine housing box 10 is attached which houses a small tank 9 and the like that is kept airtight inside and outside the gas. The three-phase breaking section is the one shown in the cross section11
and phase 12, which is not shown because it overlaps with this phase,
Furthermore, the fixed contact side member 14 of the breaker part 11 is made up of an insulator 15 whose outer shape is only shown.
The movable contact side member 16 is connected to the operating rod 6 and supported by a fixed portion 17 and an insulator 18 to which the fixed portion 17 is fixed. 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 shutoff operation, compressed air is sent from the air filling port 19 to the cylinder 3 of the operating mechanism 4 via 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 coupling part 8, and at this time, the buffer cylinder 20 fixed to the end of the operating rod 7 and the fixed piston 2
1 compresses gas, and this compressed gas is guided to an insulating nozzle 22 to extinguish the arc generated between the movable arc contact 23 and the fixed arc contact 24. Further, the conductor 25 that connects the inside and outside of the breaker is fixed by an insulating spacer 27 that is insulated from the metal tank and fixed to the conductor outlet 26, and the inside and outside of the metal tank are kept airtight. In such a conventional tank-type gas breaker, the central axis of the operating mechanism 4 in the operating direction and the central axis of the breaker 11 in the operating direction are at right angles, so it takes a long time to change the operating direction at right angles. A rotating connection must be provided. In addition, the small tank 9 that accommodates the connection part becomes large, and as mentioned above, in the case of a breaker operated by each phase, the operating devices 4 must be prepared for three phases, so the operating device storage box 10 is However, in order to make the housing box 10 smaller, the air tank, which is the drive source for the operating device 4, must be placed outside the storage box 10, and as a result, the breaker It has the disadvantage that it cannot be made compact.

Against this background, in recent years there has been an increase in the number of circuit breakers equipped with a hydraulic operating mechanism, which can more easily obtain high pressure than compressed air, and which allows the overall operating device to be made smaller. However, when compressed air is normally used, a compressor is prepared elsewhere in the substation, and the compressed air is guided through piping to a tank attached to the circuit breaker.
In most cases, a compressor was not attached to the breaker, but in the case of a hydraulically operated type, the hydraulic pump that acts as the compressor is small, and in order to prevent high-pressure oil from leaking, it is installed directly on the breaker. Since it is required to be mounted, there is a drawback that the operating device storage box cannot be made smaller depending on the arrangement. Additionally, three-phase, one-tank gas circuit breakers are often used as part of gas-insulated switchgear in combination with other disconnectors, grounding devices, instrument transformers, and 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 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 the - side, and in the case of a breaker with a hydraulic operation mechanism, the - side is not necessary if the circuit breaker has a pneumatic operation mechanism. It is necessary to provide a surface that allows the compressor, such as the hydraulic pump unit, to be removed in case of inspection or any malfunction of the compressor.

[Object of the invention] The present invention was made in consideration of the above circumstances, and
The object is to provide a hydraulically operated three-phase one-tank gas breaker that can accommodate all the members necessary for operation in the operating device storage box and downsize the operating device storage box.

[Summary of the Invention] In order to achieve the above object, the present invention accommodates a breaker section for three phases in a single tank, aligns the operating direction of the operating device with the driving direction of the breaker section, and accompanies the operating device. The storage box is compact by rationally arranging the accumulator and hydraulic pump unit inside the box, and is characterized by being able to be inspected 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 holder 1115 is fixed to the lid 30 on the lower side of the metal tank 1. A support part 33 is fixed to the small tank 9, and a rod 31 and an operating mechanism 4 are attached to the small tank 9.
A connecting portion 8 is provided that connects the rod 32 that moves while keeping airtightness between the high-pressure oil and the air. Further, the operating mechanism 4 is fixed to the support section 33.

A central axis 35 in the operating direction of this operating mechanism 4
It is arranged substantially on a straight line with the central axis 34 in the operating direction of the cutoff section. In addition, 36 is the operating device storage box 10.
A high-pressure oil accumulator is provided inside, 37 is a hydraulic pump unit, and 38 is a door that can be opened and closed 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, and 52 are the breaker parts 4 in FIG.
0, 41, and 42 operating mechanisms, respectively. Each of these breaking parts 40, 41, 42 is arranged in a triangular shape, and has a phase corresponding to the apex of a regular triangle or isosceles triangle on the surface where the inspection leg 38 is provided in the operating device storage box 10 having a rectangular cross section. The operating mechanism 50 of the breaker section is disposed on the side of the surface 43 opposite to the surface on which the inspection leg 38 is provided, and the operating mechanisms 51 and 52 of the other breaker section forming the base of the triangle are located on the side of the surface 43 opposite to the surface on which the inspection leg 38 is provided. 43 are arranged in parallel. Further, the hydraulic accumulator 36 is 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 abutment.

On the other hand, the hydraulic pump unit 37 is viewed from the door 38,
Operation mechanism 50 for the phase cutoff portion located at the apex of the triangle
operating mechanisms 51 and 52 of the other phase cutoff section next to the
It is placed closer to the front so that at least one side thereof faces the door 38.

Reference numeral 39 designates a mounting plate for mounting pressure gauges, pressure switches, circuit breaker open/close indicators, auxiliary switches, and other terminal boards, and is located on the surface of the door 38 and next to the hydraulic pump unit 37. Ru. Furthermore, a conductor outlet 26 of the metal tank 1 in which a breaker is housed is provided on the surface 43 side, and a conductor outlet 26 is provided on the surface 43 side of the storage box 10.
and the outer diameter of the metal tank 1.

With this configuration, the operating mechanism for each phase is placed almost directly below the breaker of each phase, and unlike the conventional example, the operating mechanism does not protrude horizontally, so the operating mechanism The outer shape of the storage box 10 can be made small, and the installation area can also be minimized. Also,
Providing the accumulator 36 on the conductor outlet 26 side of the operating device storage box 10 means that even if the outer shape of the storage box 10 is extended to the outside of the outer diameter of the metal tank 1 that accommodates the interrupter, Since the installation area is not affected up to the end of the storage box 10, it is possible to effectively use a location within the storage box 10 where it is relatively easy to create a space. Furthermore, the hydraulic pump unit 37 is connected to the chastity test vinegar 38.
Since it can be placed facing the side, it is possible to inspect it, and even if there is a problem, it can be easily pulled out without removing other unrelated parts. becomes.

As mentioned above, the 3-phase, 1-tank gas breaker of this configuration has the operating direction and operation of the breaker section even if the operating machines for each phase are housed in a single operating machine storage box. The operating direction of the mechanism is the same direction, and there are no protrusions such as rotating parts, so the smallest operating mechanism can be prepared, and the accumulator 36, which requires relatively no inspection, is located far away from the inspection door 38. Because it is located in a place with a large space, the number of circuit breakers can be changed freely depending on the number of times the circuit breaker is required to operate, etc., and inspection and replacement of the hydraulic pump unit 37 can be easily performed. The operating device storage box 10 can be made into a box 10 with a size of can do.

In the above embodiment, a three-phase one-tank type gas breaker of a single-phase operation type was explained as an example, but the same effect can be obtained in the case of a three-phase collective operation type, and the operating device in this case A cross-sectional view of the inside of the storage box 10 is shown in FIG.

In the figure, reference numeral 53 indicates the breaking portion 40°41.
This is a single operation Iall that operates all 42 at once.

In addition, an accumulator 36, a hydraulic pump unit 37
, and the mounting plate 39 for attaching pressure gauges, indicators, etc., are assumed to be the same as the arrangement with respect to the operation mechanism of each phase explained in FIG. Just do it. 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 a hydraulically operated three-phase operating device storage box that can house 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 breaker.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a conventional three-phase one-tank gas breaker, FIG. 2 is a side sectional view showing an embodiment of the present invention, and FIG.
The figure is a sectional view taken along the line A-A in FIG. 2, and FIG. M4 is a sectional view showing another embodiment of the present invention. 1...metal tank, 4,50,51,52.53...
・Operation I! IW4.10...Control unit storage box, 36...
・Accumulator, 37... Hydraulic pump unit,
38...Inspection door, 40.41.42...Shutoff section. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 3 Figure 4

Claims (4)

[Claims] (1) Each phase has three breaker parts in a single tank.
The operator housing box is arranged to form a square shape, and is provided at the bottom of the tank and has a substantially rectangular cross section, and the inside of the operator housing box can be inspected on the side of the side that is the apex of the triangle when viewed from above. A door is provided, and an accumulator is arranged between the base of the triangle and the other surface so that the bottom of the triangle is parallel to the other surface of the operating device storage box that faces the surface on which the door is provided. , a hydraulic pump unit is arranged next to the breaker located at the apex of the triangle so that at least one side thereof is located on the side of the door, and a pressure gauge and a pressure switch are arranged on the remaining side of the door. , a three-phase one-tank type gas characterized by arranging members such as an opening/closing indicator and a terminal board for auxiliary switches, and in which the operating direction of the shutoff part and the operating direction of the operating mechanism are the same direction. Breaker. (2) Claim (1) in which the operation method is a single-phase operation type, and the central axis through which the breaker operates and the central axis through which the operation operates are arranged substantially on a straight line. 3-phase, 1-tank type gas breaker as described in 2. (3) A three-phase, one-tank type gas breaker according to claim (1), wherein the operation method is a three-phase finger-operated type. (4) Claim No. 1 in which the three-phase interrupting portions are arranged so that each phase forms a regular triangle or an isosceles triangle.
3-phase, 1-tank type gas breaker as described in ).