JPS6252410B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas liner and disconnector, particularly to a gas liner and disconnector most suitable for single-phase reclosing type.

Conventional single-phase reclosing type gas shield disconnectors have each phase separated by an independent sealed container.
Additionally, an operating device was provided for each phase. Therefore, three phases of gas cylinders and disconnectors each having the same configuration were arranged in parallel.

This type of gas shield disconnector requires a large installation area and is more expensive than the three-phase all-in-one type described below.

On the other hand, a three-phase all-in-one gas shield disconnector has three phase shields in a sealed container that is common to all three phases, and can be made smaller and used for single-phase reclosing gas. It is cheaper than a breaker.

However, when attempting to construct a single-phase reclosing type by taking advantage of the advantages of the three-phase all-in-one type, a problem arises in the configuration of the operating device that opens and closes the sheath section. In other words, in a general gas shutoff switch, the operating device consists of a circuit opening operating mechanism that performs the circuit opening operation, a circuit closing operating mechanism that performs the circuit closing operation, and a doss pot device that absorbs the residual energy of the circuit operating force. Therefore, in order to intensively configure three phases, the arrangement and structure pose problems.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas insulator and disconnector whose operating device is easily constructed and the entire structure is simplified.

In the present invention, by arranging three mechanisms, which are the main constituent units of the operating device, in three directions, the space occupancy efficiency of the operating device for three phases is increased and the overall size is reduced. That is, in the present invention, the circuit-opening operating mechanism and the dart pot device are arranged horizontally facing each other to improve maintenance and performance, and the spring device as the circuit-closing operating mechanism is provided vertically to effectively control the spring force and stroke. Selected.

The present invention will be explained below with reference to a single-phase reclosing type three-phase bulk gas insulator and disconnector shown in the drawings.

Figure 1 shows the configuration centered on the edge and section,
In the common container 1 filled with an insulating medium such as SF ₆ gas, there are three phase shield units 2U, 2V, 2W.
are arranged, for example, at each vertex of an isosceles triangle. The shroud section unit has a configuration known as a well-known puff type gas sheath breaker, and will be described in detail. To explain the shear section units 2U, 2V, 2W using a W-phase example,
Each has a fixed contact 3W and a movable contact 4W, and conductors 5W and 6 are respectively connected to both contacts.
W is led out of the common container 1 by a branch pipe. Each phase and section unit is supported by an insulating support tube 7U, 7V, 7W, respectively, and the insulating operation rods 8U, 8V, 8W arranged in the insulating support tube 7U, 7V, 7W are respectively supported by an insulating support tube 7U, 7V, 7W. It is led out of the common container 1 so as to reach the operating force transmission mechanism for operating the movable contact.

The above-described structure of the shield section is the same as that of a conventional three-phase all-in-one gas shield disconnector.

FIG. 2 is a perspective view showing the connection configuration at the lower ends of the insulated operating rods 8U, 8V, and 8W.

There is a partition wall 9a in the mechanism case 9 provided at the bottom of the bottom plate 1a of the common container 1.
The gas space within the common container 1 is separated from the outside air by the gas space. The partition wall 9a has three rotating shafts 10U, 1
0V and 10W are supported by an airtight maintenance device 27 so as to be able to rotate while maintaining airtightness. These three rotation axes are located on the same horizontal plane,
The rotating shafts 10U and 10V are located on substantially the same axis, and the other rotating shaft 10W is located on another parallel axis. These three rotating shafts 10U, 10V,
Lever 11U, 11V, 11W is fixed to 10W inside the partition wall 9a, respectively, and insulated operation rods 8U, 8V, 8W are connected to each lever. Also, each rotating shaft 10U, 10V, 10W
One end is led out to the outside of the partition wall 9a, and a circuit closing operating mechanism or an operating device comprising a circuit closing operating mechanism is connected to this leading end.

Therefore, the opening/closing circuit operation mechanism exists in the atmosphere separated from the gas space in the common container 1, and its maintenance and inspection can be performed while the common container 1 is filled with gas. can. In other embodiments, it is also possible to arrange a circuit closing operation mechanism such as a closing spring on the extension of the lower end of the insulated operation rod, but in this case, the circuit closing operation mechanism must also be provided in the same gas space as the inside of the common container 1. This inevitably increases the amount of gas to be recovered for maintenance and inspection of the sheath section unit, increasing the time required for the work. However, in this example, 3
The rotation axes 10U, 10V, 10W of the phases are provided on almost the same horizontal plane, and the rotation axes 10U, 10V, 10W are
Since an airtight portion is formed between W and the partition wall 9a, the height of the mechanism case 9, which is filled with gas together with the common container 1, is minimized, that is, the gas filling volume is minimized.

In relation to this configuration, each three-phase rotating shaft 10U,
Another feature is that 10V and 10W are arranged in parallel. As a result, in this embodiment, as will be clear from the description that will be given later, operating devices for three phases can be arranged on one side.

Furthermore, in the illustrated configuration of this embodiment, the U-phase and V-phase rotating shafts 10U, 1 are provided on the same axis.
The configuration of the connection part with 0V will be explained. Both rotating shafts are insulated operating rods 8U, 8V on the side of the shingle section unit.
The connecting portion with the opening/closing path operating mechanism is provided on the outside of the connecting portion with the opening/closing path operating mechanism, that is, on the opposite end of both rotating shafts.
For this reason, even if the sheath cutting unit is arranged in close proximity to the rotary shaft, taking advantage of the fact that it is constructed in an insulating cylinder and can reduce the interphase insulation distance, there is no problem in connecting it to the rotating shaft. On the other hand, since the opening/closing path operating mechanism can have a wide variety of configurations, it is advantageous to connect it to both rotating shafts on the outside because it allows flexibility in determining the size of the operating mechanism.

Each rotating shaft 10U, 10V, 10W has a partition wall 9.
Lever 12U, 12 is attached to the outer end of a.
V and 12W are fixed, and an opening/closing path operating mechanism is connected to each of these levers. The details will be explained using FIG. 3.

As described above, the three-phase circuit opening operation mechanism is centrally arranged on the side of the passage in the common container 1. This circuit opening operation mechanism 15U, 15V, 15W
is known, for example, as a pneumatic operator. Opening operation mechanism 15U, 15V movable piston 16
One ends of rods 17U and 17V are connected to U and 16V, respectively, and the other ends of the rods are connected to one ends of L-shaped external levers 12U and 12V. On the other hand, in the W phase, if the configuration is the same as that of the other two phases, the circuit opening operation mechanisms of the three phases will be lined up in a horizontal line, making this part larger. Second rotating shaft 1
A lever 19 provided on the second rotating shaft 18 and the lever 12W are connected by a rod 20, and an L-shaped lever 21 having the same function as the U-phase and V-phase external levers 12U and 12V is provided. It is set up.
Due to the configuration of these two rotating shafts 10W and 18,
The insulating operating rod 8W and the L-shaped lever 21 are located on the same vertical plane. One end of a rod 17W is connected to the other end of the L-shaped lever 21, and a movable piston 16W of a circuit opening operation mechanism 15W is connected to one end of the rod 17W.

In this way, the movable piston 16U of each phase,
The circuit opening operation mechanisms 15U, 15V, and 15W of each phase represented by 16V and 16W are arranged at each vertex of an inverted isosceles triangle, and can be minimized in the width direction and height direction. Of course, the circuit opening operation mechanism 15U, 15
Since the three phases of V and 15W are concentrated, it is extremely convenient for maintenance and inspection.

At the other end of the three-phase L-shaped levers 12U, 12V, 21, closing spring devices 22U, 22V, 22W are connected to each rod 28 as a closing operation mechanism, respectively.
They are connected via U, 28V, and 28W. The relationship between the opening and closing operation mechanisms is that the closing spring device is biased by the operation of the circuit opening operation mechanism using compressed air as a driving medium, and when the state of the circuit opening operation mechanism is released, the return force of the closing spring device is activated. It is designed to operate as a closed circuit.

Furthermore, the L-shaped lever 12U of each phase rotation shaft 10,
On both sides of 12V, 21, a pair of levers 23U,
23V and 23W are each fixed. In addition, movable pistons 26U, 26V, 26W of dash pot devices 25U, 25V, 25W are connected to each phase lever 23U, 23V, 23W, respectively, and thereby movable piston 16 of each phase
Movable piston 26 for each phase of U, 16V, 16W
U, 26V, 26W are arranged opposite to each other,
They are configured to move together on almost the same axis. The connection structure of the pair of levers 23U, 23V, 23W of each phase will be explained using FIG. 4, which shows only the U phase.

A pair of levers 23U are provided with the external lever 12U in between, and each lever has a link 27.
U ₁ and 27U ₂ are connected to each other, and a rod 28U that connects one end of the closing spring device 22U to the external lever 12U connects both links 27U ₁ and 27
The opposing distance and axial length of both links 27U 1 and 27U 2 are determined so that the links 27U _{1 and} 27U ₂ can move freely between the opposing links according to the rotation of the rotating shaft 10U. Both links 27
The other end of U ₁ , 27U ₂ is the piston shaft 29U
are connected across. With this configuration, the circuit opening operation force from the circuit opening operation mechanism 15U is transmitted to the dart pot device 25U and the closing spring device 22U in a balanced manner, and also to the closing spring device 22U.
The circuit-closing operating force is also transmitted to the circuit-opening operating mechanism 15U and the dart pot device 25U in a balanced manner. In addition, in other embodiments, the external lever 12U
If you want to reverse the position of lever 23U, link 2
7U ₁ , 27U ₂ and rod 28U can be replaced. In any case, the above-mentioned effects can be obtained by configuring the rod 17U and the piston shaft 29U on substantially the same axis.

The above-mentioned effects can be obtained by using the dart pot device 25U,
This can also be obtained by replacing the positions of the circuit-closing operating mechanism shown by the closing spring device 22U and the circuit-opening operating mechanism 16U, but the arrangement of the illustrated embodiment brings about a novel effect.

That is, since the dart pot device 25U uses oil or the like, it is arranged horizontally so that the dart pot hole is not affected by changes in the oil level. In addition, as described above, the circuit opening operation mechanism 15U
Since it is located on the aisle side, maintenance and inspection are easy. Furthermore, since the closing spring device 22U extends on different axes at the same location, it is possible to set the stroke separately from the stroke of the opening/closing circuit operating mechanism and utilize its characteristics. Since it is arranged in three directions in a vertical plane, the operating device can be made compact due to effective use of space.

As explained above, the present invention includes a circuit opening operation mechanism, a dart pot device, and a closing spring device.
Since the circuit-opening operating mechanism and the doss pot device are arranged in the same direction and act in opposite directions on substantially the same axis, maintenance and inspection are easy and stable performance can be obtained. In addition, these three devices were arranged in three directions on the same vertical plane, and the closing spring device was installed almost vertically, so that the closing spring device could be adjusted according to the spring characteristics regardless of the stroke of the circuit-opening operating mechanism. Stroke and output can be set. By using separate rotation axes, each phase can be configured individually for each mechanism.For example, the closing spring device can be placed at the bottom of a common container, simplifying the overall configuration. can do.

The same effect can be obtained even if an L-shaped lever or the like is inserted between the rod 17 and the movable piston 16 and the direction in which the movable piston 16 opens the circuit is reversed from the illustrated example.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of a gas shield disconnector according to an embodiment of the present invention, FIG. 2 is an enlarged partial sectional view of the surface of FIG. 1, and FIG. 3 is a perspective view of the operating system of FIG. 1. FIG. 4 is an enlarged view of the main part of FIG. 3. 1... Common container, 2U, 2V, 2W... Sheath section unit, 9... Mechanism case, 10U, 10
V, 10W...rotating shaft, 11U, 11V, 11W
... Lever, 12U, 12V, 12W ... External lever, 15U, 15V, 15W ... Opening operation mechanism, 22U, 22V, 22W ... Closing spring device,
23U, 23V, 23W...Lever, 25U, 2
5V, 25W...Dashpot device, 27...
Airtight maintenance device, 27U ₁ , 27U ₂ ... link, 2
8U, 28V, 28W... Rod.

Claims (1)

[Claims] 1. A three-phase shield unit is arranged in a common container filled with an insulating gas, and an operating device for each phase is arranged independently outside the common container, and each of the shields In a device in which the disconnection units are connected by operating force transmission mechanisms, each of the above operating devices for three phases includes a circuit-opening device mechanism and a closing spring arranged in a vertical plane parallel to each other between the phases. The circuit-opening operating mechanism and the dart pot device are provided facing each other on substantially the same horizontal axis, and the closing spring device is provided substantially vertically so that these three devices are arranged on the same vertical plane. , the operating force transmission mechanism for each phase has a rotating shaft for each phase that is independently arranged on the same horizontal plane in the mechanism case provided below the common container, and each rotating shaft has a lever and an insulation operating shaft, respectively. A gas cylinder and disconnector characterized in that it is connected to each phase unit and disconnection unit in a common container via a rod, and is also connected to an operating device for each phase outside the mechanism case. 2. In the device described in claim 1 above, the rotation shaft and the operating device are connected by connecting one end of an L-shaped external lever provided outside the mechanism case to the circuit-opening operating mechanism. A gas cylinder disconnector characterized in that the other end is connected to the closing spring, and the dumppot device is connected to a pair of levers of a predetermined length provided on the rotating shaft with the external lever in between.