JP2579841Y2 - Gas circuit breaker - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-phase batch operation type gas circuit breaker, and more particularly to a gas circuit breaker which is improved in miniaturization of equipment and stabilization of switching characteristics.

[0002]

2. Description of the Related Art In general, there is a strong demand for downsizing and high reliability of facilities with the rapid economic growth. In order to meet this demand, it is necessary to reduce the size of the equipment constituting the equipment and stabilize the performance. These technical needs are
It is also required for gas circuit breakers installed in substation facilities and the like. That is, in a gas circuit breaker, there is a demand for downsizing of a device and stabilization of switching characteristics, and various improvements have been made to realize this. For example, as a gas circuit breaker excellent in miniaturization, a three-phase batch operation type gas circuit breaker has attracted much attention.

Here, a conventional example of a three-phase batch operation type gas circuit breaker will be specifically described with reference to FIGS. 3 and 4. FIG. This gas circuit breaker is provided with vertical tanks 1a, 1b, 1c in which three-phase shutoff portions are housed. The vertical tanks 1a, 1b, 1c are provided with two upper and lower outlets in a direction orthogonal to the longitudinal direction, and bushings 2a, 2
b, 2c, 3a, 3b, 3c are connected. Also,
A gantry 4 is arranged below the three-phase vertical tanks 1a, 1b, 1c. The stand 4 allows the vertical tank 1
a, 1b, and 1c are supported and fixed.

An operation mechanism 5 having an operation source 5a is arranged inside the gantry 4. Further, the rotating shaft 11 is installed horizontally in the inter-phase direction in the gantry 4. A first connecting portion D1 for connecting the operating mechanism 5 and the rotating shaft 11 in a direction perpendicular to the central portion of the rotating shaft 11.
Is installed. The first connecting portion D1 is connected to the operation source 5a.
, And a first connector 9 for connecting the shaft link 6 and the rotating shaft 11.

[0005] The second end of the rotary shaft 11 and the substantially central portion thereof are perpendicular to each other, in order from the lower side in FIG.
Connection parts A1, B1, and C1 are provided. The second connecting portions A1, B1, and C1 connect the rotating shaft 11 and the three-phase shutoff portions in the vertical tanks 1a, 1b, and 1c, respectively. The second connecting portions A1, B1, and C1 include rotary seal portions 7a, 7b, and 7c for each phase, links 8a, 8b, and 8c for the shutoff portion connected to the shutoff portions for each phase, and a link 8 for the shutoff portion.
a, 8b, and 8c, and second connectors 10a, 10b, and 10c that connect the rotating shaft 11 to the rotary shaft 11.

In the conventional example shown in FIGS. 3 and 4, the first connecting portion D1 and the second connecting portions A1, B1, C1 are arranged at the following positions. That is, the first connecting portion D1
Is disposed between the second connecting portions A1 and B1 and opposed to the second connecting portion A1. Also, the second connecting portions A1, B1,
C1 is arranged on one side (upper side in FIG. 4) of the vertical tanks 1a, 1b, 1c.

In the gas circuit breaker having the above configuration, the shaft link 6 and the first connector 9 are operated by driving the operation source 5a, and the rotary shaft 11 connected to the first connector 9 rotates. I do. The driving force due to the rotation of the rotating shaft 11 is transmitted to the breaking portion links 8a, 8b, 8c of each phase via the second connectors 10a, 10b, 10c. Therefore, the blocking portion links 8a, 8b, 8c rotate, and this rotational force is transmitted to the blocking portions of each phase via the rotary seal portions 7a, 7b, 7c. Therefore, the three-phase breaking unit can perform the opening operation and the closing operation collectively.

[0008]

[Problems to be Solved by the Invention] However, the three-phase batch operation type gas circuit breaker having the above-mentioned configuration includes:
The following problems have been pointed out. That is, the second connecting portions A1, B1, C1 are all vertical tanks 1a, 1b,
1c (upper side in FIG. 4), the width W1 of the gantry 4 and the width L1 of the rotating shaft 11 are increased.

When the width W1 of the gantry 4 is increased, the size of the gas circuit breaker is increased, and the equipment is inevitably increased in size as the installation area is increased. In addition, when the width L1 of the rotating shaft 11 is increased, the possibility that the operating direction of the second connecting portions A1, B1, and C1 that connect the rotating shaft 11 and the blocking portions of each phase is likely to be twisted during the opening / closing operation. As a result, there is a possibility that a problem that the opening position of the blocking portion of each phase varies.

As described above, in the conventional three-phase batch operation type gas circuit breaker, the second connecting part for connecting the three-phase shutoff part and the rotary shaft is arranged only on one side of the vertical tank. However, the width of the gantry has been increased, and the installation area of the gas circuit breaker has been increased, resulting in an increase in the size of the equipment. At the same time, the length of the rotating shaft became longer, causing variations in the separation positions of the respective phase cutoff portions, and the opening and closing characteristics became unstable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the invention is to realize downsizing of equipment and contribute to downsizing of equipment, as well as separation positions of respective phase cut-off portions. It is an object of the present invention to provide a gas circuit breaker which prevents variation in the switching characteristics and stabilizes switching characteristics.

[0012]

In order to achieve the above object, the present invention provides a three-phase vertical tank having a shut-off part therein and two outlets, and a lower part of the vertical tank. In a three-phase batch operation type gas circuit breaker in which a gantry supporting the vertical tank is fixed and an operation mechanism for collectively operating the three-phase shutoff unit is provided inside the gantry, in a direction between phases in the gantry. A rotating shaft is installed horizontally, and a first connecting portion that connects the operating mechanism unit and the rotating shaft is installed in the vicinity of the center of the rotating shaft in a direction perpendicular to the rotating shaft. A second connecting portion that connects the rotating shaft and the three-phase blocking portion is provided in a direction perpendicular to the second connecting portion. Of the second connecting portions, second connecting portions of outer phases located at both ends of the rotating shaft are provided. Centrally located And wherein the door.

[0013]

In the present invention having the above configuration,
Of the second connecting portions that connect the rotating shaft and the three-phase blocking portion, the second connecting portions of the outer phases located at both ends of the rotating shaft are provided.
By arranging the connecting portion on the center side, the width of the gantry and the rotating shaft can be reduced. In order to shorten the width of the gantry, the size of the gas circuit breaker is reduced, and the installation area of the gas circuit breaker can be reduced. Also,
When the width of the rotating shaft is shortened,
The operation direction of the connecting portion can be prevented from being twisted. As a result, it is possible to prevent the opening positions of the blocking portions of each phase from varying.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas circuit breaker according to the present invention will be described below in detail with reference to FIGS.
This embodiment is a three-phase batch operation type gas circuit breaker. This gas circuit breaker is provided with vertical tanks 1a, 1b, 1c. Inside the vertical tanks 12a, 12b, and 12c, three-phase shutoff portions are housed. In addition, the vertical tank 12a,
In the direction orthogonal to the longitudinal direction of 12b, 12c,
There are two outlets, where the bushing 13
a, 13b, 13c, 14a, 14b, 14c are connected. Also, the three-phase vertical tanks 12a, 12b, 1
A gantry 15 is disposed below 2c. This stand 1
5, the vertical tanks 12a, 12b, 12c are supported and fixed.

An operation mechanism 16 having an operation source 16a is disposed inside the gantry 15. In addition, a rotating shaft 22 is installed horizontally in the inter-phase direction in the gantry 15. A first connecting portion D is installed near the center of the rotating shaft 22 in a direction perpendicular to the rotating shaft 22. The first connecting portion D connects the operating mechanism portion 16 and the rotating shaft 22 and the shaft link 1 connected to the operating source 16a.
7 and a first connector 20 for connecting the shaft link 17 and the rotating shaft 22.

Also, the second end of the rotary shaft 22 and the vicinity of the center thereof are perpendicular to each other, in order from the lower side in FIG.
Connection parts A, B, and C are provided. Second connecting parts A, B, C
Are the rotary shaft 22 and the vertical tanks 12a, 12b, 12
c, the rotary seals 18a, 18b, 18c, the links 19a, 19b, 19c and the second connector 21a,
21b and 21c. Of these, the link 19 for the blocking part
a, 19b and 19c are connected to the cutoff portions of the respective phases. The second connectors 21a, 21b, and 21c are members that connect the links 19a, 19b, and 19c for the cutoff portions and the rotary shaft 22.

Further, as a structural feature of the present embodiment, the second connecting portions A and C of the outer phases (upper and lower sides in FIG. 1) located at both ends of the rotary shaft 22 are located at the center side. Are located. Note that the first connecting portion D is disposed between the second connecting portions A and B and opposed to the second connecting portion A.

In the gas circuit breaker having the above-described configuration, the shaft link 17 is driven by driving the operation source 16a.
Then, the first connector 20 operates, and the rotating shaft 22 connected to the first connector 20 rotates. This rotating shaft 2
Of the second connector 21a, 21b, 2
1c, links 19a, 19b, 1
9c. As a result, the link 19a, 1
9b and 19c rotate, and the rotational force is applied to the rotary seal portion 18
a, 18b and 18c to the cutoffs of each phase. Therefore, the three-phase breaking unit can perform the opening operation and the closing operation collectively.

According to this embodiment as described above, of the second connecting portions A, B and C, the second connecting portions A and C of the outer phases located at both ends of the rotary shaft 22 are located on the center side. Since it is arranged, the width dimension W of the gantry 4 of the conventional example shown in FIGS.
1, the width W of the gantry 15 can be reduced. Also,
When comparing the width L1 of the rotating shaft 11 and the width L of the rotating shaft 22 in the conventional example, the latter can be shorter than the former by about one width of the vertical tank.

By reducing the width W of the gantry 15, the size of the gas circuit breaker can be reduced. Therefore, the installation area of the gas circuit breaker can be reduced, which can contribute to downsizing of the equipment. Also, the rotating shaft 2
Since the width L of the second connection portion 2 is significantly shorter than that of the conventional example, there is a great possibility that the operation directions of the second connection portions A, B, and C connecting the rotary shaft 22 and the three-phase shutoff portions are twisted during opening and closing operations. Low. Therefore, it is possible to prevent variations in the separation positions of the blocking portions of each phase, and to stabilize the opening / closing characteristics. Note that the present invention is not limited to the above-described embodiment, and the shapes, dimensions, and the like of the respective constituent members can be appropriately changed.

[0021]

As described above, according to the gas circuit breaker of the present invention, of the second connecting portions for connecting the rotary shaft and the three-phase shutoff portion, the outer connecting portions located at both ends of the rotary shaft. By arranging the second connection part of the phase on the center side, the width of the gantry supporting the vertical tank and the rotating shaft can be shortened, realizing downsizing of the equipment and contributing to downsizing of the equipment. At the same time, the opening / closing characteristics of each phase cut-off portion can be stabilized by preventing variation in the opening position.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a gas circuit breaker according to the present invention.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a side view of a conventional gas circuit breaker.

FIG. 4 is a plan view of a conventional gas circuit breaker.

[Explanation of symbols]

12a, 12b, 12c Vertical tanks 13a, 13b, 13c, 14a, 14b, 14c Bushing 15 Frame 16 Operating mechanism 17 Link for shaft 18a, 18b, 18c Rotary seal 19a, 19b, 19c Link for blocking 20 First connection Connectors 21a, 21b, 21c Second connector 22 Rotary shaft A, B, C Second connector D First connector L Width of rotary shaft 22 W Width of gantry 15

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01H 33/42 H01H 33/56

Claims (1)

(57) [Scope of request for utility model registration] 1. A three-phase vertical tank having two shut-out portions and two outlets therein is provided therein, and a gantry supporting the vertical tank is fixed to a lower portion of the vertical tank. In a three-phase batch operation type gas circuit breaker in which an operation mechanism for batch-operating the three-phase shutoff unit is disposed, a rotary shaft is installed horizontally with respect to a direction between phases in the gantry, and a center of the rotary shaft is provided. A first connecting portion for connecting the operating mechanism and the rotating shaft is installed in the vicinity of the rotating shaft at right angles, and the rotating shaft and the third shaft are orthogonally mounted near both ends and the center of the rotating shaft. A second connecting portion connecting the phase cut-off portion and the second connecting portion, wherein the second connecting portions of the outer phases located at both ends of the rotary shaft are arranged on the center side of the second connecting portion. Characteristic gas Cross-sectional device.