JPH11234814A - Gas cutoff apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate restriction concerning the angle of a nipple to the ground surface when the nipple is led out from a ground vessel main trunk, increase the freedom, and obtain a angle advantageous to snow countermeasure while ensuring sufficient welding strength, by arranging the ground vessel main trunk slantingly to the ground surface. SOLUTION: A ground vessel main trunk 1 is arranged slantingly toward a transformer 9 to the ground surface 10. When the main trunk 1 is formed integrally with the transformer 9, the axial line of the main trunk 1 is inclined to the vertical direction of the ground surface 10, so that inclination angles of nipples 4, 8 to the ground surface 10 can be arbitrarily selected by changing the inclination angle of the main trunk 1. As a result, restriction concerning the welding of the nipples 4, 8 to the ground vessel main trunk 1, e.g. restriction that the nipples 4, 8 are deeply fixed to the main trunk 1 in order to obtain desired welding strength can be excluded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas circuit breaker used in electric stations such as power stations, substations, and switchyards.
It mainly relates to a gas circuit breaker directly connected to and integrated with a transformer.

[0002]

2. Description of the Related Art Generally, a gas circuit breaker is used in an electric station such as a power station, a substation, or a switchyard. In recent years, a type integrated with a transformer has been used for the purpose of reducing installation space. Widely adopted. More recently, attempts have been made to mount a transformer-integrated gas circuit breaker on a trailer or the like to configure a device called a “mobile substation”.

[0003] A conventional example of such a gas circuit breaker integrated with a transformer will be specifically described with reference to FIG. The gas circuit breaker is provided with a main body 1 of the grounded container, and a transformer 9 is provided adjacent to the main body. Grounding vessel main body 1
Is arranged so that its axis is perpendicular to the ground 10, and the inside thereof is sealed with an insulating medium and accommodates the current interrupting section 2. In addition, nozzle portions 4 and 8 projecting outward are welded to the side surface of the main body 1 of the grounded container. The nozzle section 4 is formed above the current interrupting section 2 and obliquely upward, and the nozzle section 8 is formed below the current interrupting section 2 and horizontally.

[0004] High voltage conductors 3 and 7 are connected to the upper and lower portions of the current interrupting section 2, respectively. Among them, the high-voltage conductor 3 is drawn out to the outside (the right side in FIG. 5) of the main body 1 of the grounding vessel via the nozzle 4, and the gas bushing 5 is connected thereto. Further, an overhead wire 6 is installed at the tip of the gas bushing 5. The high-voltage conductor 7 is drawn out of the grounded vessel main body 1 (left side in FIG. 5) via the nozzle section 8 and is connected to the transformer 9 adjacent to the grounded vessel main body 1. It is directly connected. An insulating spacer 17 is provided between the nozzle section 8 and the transformer 9.

[0005]

When the high-voltage conductors 3 and 7 are drawn from the main body 1 of the grounded container to the outside atmosphere or to another device such as the transformer 9, the main body 1 of the grounded container may be used.
Through the nozzles 4 and 8 welded to the side surfaces of the grounding vessel. In order to obtain sufficient welding strength, these nozzles 4 and 8 must have a deep mounting angle with respect to the main body 1 of the grounded vessel. No. On the other hand, in the nozzle section 4 for drawing out the high-voltage conductor 3 into the outside atmosphere, when the mounting angle becomes nearly horizontal, the gas bushing 5 connected to the nozzle section 4 also becomes nearly horizontal,
During snowfall, snow may accumulate on the surface of the gas bushing 5 to form a snow cover 18. If the snow crown 18 melts, the creeping insulation strength of the gas bushing 5 may be reduced, and eventually, a ground fault may occur in the power system. Therefore, it is required that the nozzle portions 4 and 8 have an attachment angle that prevents the snow cover 18.

As described above, the nozzle portion 4 with respect to the ground 10 is
The mounting angle of 8 is the main body 1 of the grounded container with excellent reliability
It is a very important factor in the production of steel, and is subject to various restrictions such as securing welding strength and measures against snow cover. Therefore, conventionally, it is required to increase the degree of freedom of the mounting angle of the nozzle portions 4 and 8 with respect to the ground 10.

The degree of freedom of the mounting angle of the nozzle section 4 connected to the gas bushing 5 is desirably higher in order to ensure the inter-phase insulation distance between the high voltage portions at the tip of the gas bushing 5. That is, the above-described gas circuit breaker is often transported while being integrated with the transformer 9, but if the degree of freedom of the mounting angle of the nozzle section 4 is low, the separation distance between the gas bushings 5 is increased. And the gas circuit breaker may not be able to meet the transport restrictions dictated by the mode of transport. In this case, only the gas bushing 5 must be separately sent and mounted on site, which increases costs and lowers economic efficiency.

In other words, in the prior art, since the degree of freedom of the mounting angle of the nozzle portion is low, it is difficult to secure the inter-phase insulation distance with a margin in a limited installation space, and the installation area of the equipment increases. However, with the increase in size, restrictions on transportation became severe, which was economically disadvantageous. In order to avoid such problems, it is strongly expected that the degree of freedom of the mounting angle of the nozzle portion is increased.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and its main object is to remove restrictions on the mounting angle of the nozzle portion withdrawn from the main body of the grounded container with respect to the ground. It is an object of the present invention to provide a highly reliable gas circuit breaker capable of increasing the degree of freedom and obtaining an advantageous mounting angle for snow cover measures while obtaining sufficient welding strength.

Another object of the present invention is to increase the degree of freedom of the mounting angle of the nozzle portion with respect to the ground, thereby securing a phase-to-phase insulation distance to reduce the installation area of equipment and ease restrictions on transportation. And to provide a gas circuit breaker which is excellent in economic efficiency and can contribute to the above.

[0011]

According to a first aspect of the present invention, there is provided a gas circuit breaker, comprising: a main body portion of a grounded container in which an insulating medium is sealed; The current cut-off portion is housed and a nozzle portion protruding outward is welded, and a high-voltage conductor is connected to the current cut-off portion, and the high-voltage conductor is passed through the nozzle portion. In the gas circuit breaker drawn out from the main body of the grounded container, the main body of the grounded container is arranged to be inclined with respect to the ground.

In the first aspect of the present invention,
The main body of the grounding container, which was conventionally arranged perpendicular to the ground plane, is placed at an angle to the ground surface.By changing the angle of inclination of the main body of the grounding container itself, Irrespective of the restrictions on the welding of the nozzle section, the mounting angle of the nozzle section with respect to the ground can be set freely. In other words, the inclination angle of the nozzle section can be set arbitrarily, and the nozzle section can be attached to the main body of the grounded vessel at an angle that is advantageous in terms of measures against snowfall while ensuring the desired welding strength. Further, in the present invention, since the main body of the grounding container is disposed at an angle, the distance between the outlets of the gas circuit breaker can be reduced. Therefore, it is possible to reduce the installation area of the equipment, and it is possible to contribute to downsizing of the gas circuit breaker.

According to a second aspect of the present invention, in the gas circuit breaker according to the first aspect, a transformer is provided adjacent to the grounded container main body, and the transformer is drawn out of the grounded container main body to the outside. A transformer-integrated gas circuit breaker to which the high-voltage conductor is directly connected, wherein the main body of the grounding container is arranged to be inclined toward the transformer.

According to the second aspect of the present invention, by arranging the main body of the grounded container toward the transformer, the installation area of the transformer integrated with the gas circuit breaker can be reduced. , It is possible to ease transportation restrictions,
High economic effect.

According to a third aspect of the present invention, there are provided a plurality of main bodies of a grounded container which are sealed with an insulating medium, and each of the main bodies of the grounded containers has a current interrupting portion stored therein and protrudes outward. A nozzle part is welded, a high voltage conductor is connected to the current interrupting part, and the high voltage conductor is drawn out of the grounded vessel main body through the nozzle part to a phase separated type. In the gas circuit breaker, the main body of the grounded container is arranged such that an angle between an axis of the main body of the grounded container and the ground is different between at least one or more phases.

According to the third aspect of the present invention, the angle between the axis of the main body of the grounded container and the ground is changed between one or more phases to minimize the inter-phase distance in the gas circuit breaker. The setting area can be set, and the installation area of the gas circuit breaker can be reduced.

The invention of claim 4 is the invention of claim 1, 2 or 3.
In the gas circuit breaker described above, when the nozzle portion is welded below the current interrupting portion, the lower surface portion of the nozzle portion is configured to be horizontal or at an elevation angle with respect to the ground. It is characterized by.

According to the fourth aspect of the present invention, even if foreign matter is mainly generated from the current interrupting portion when the current is interrupted and falls on the lower surface of the nozzle portion below the current interrupting portion, Since the lower surface of the nozzle portion is horizontal or at an elevation angle with respect to the ground, the foreign matter can remain on the lower portion of the nozzle portion. Therefore, the foreign matter does not move outward from the main body of the grounded container, and it is possible to prevent a decrease in the insulation performance of the gas circuit breaker due to the foreign matter.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. The following embodiment of the present invention is similar to the conventional example shown in FIG.
Since it is a transformer-integrated gas circuit breaker, the same members are denoted by the same reference numerals, and description thereof will be omitted.

(1) First Embodiment A first embodiment is a gas circuit breaker including the inventions according to claims 1 and 2, and as shown in FIG.
Is characterized in that it is arranged inclining toward the transformer 9 with respect to the ground 10.

According to the first embodiment, when the main body 1 of the grounded container is integrated with the transformer 9, the axis of the main body 1 of the grounded container is aligned with the vertical direction of the ground 10. By changing the inclination angle of the main body 1 of the grounded container, the inclination angle of the nozzles 4 and 8 with respect to the ground 10 can be arbitrarily selected. Therefore, restrictions on the welding of the nozzles 4 and 8 to the grounded vessel main body 1, for example, restrictions such as mounting the nozzles 4 and 8 deeply on the grounded vessel main body 1 in order to obtain a desired welding strength. I do not receive. As a result, the inclination angles of the nozzle sections 4, 8 can be set freely. Therefore, it is possible to attach the nozzles 4 and 8 to the grounded vessel main body 1 at an angle that is advantageous for snow cover while ensuring a desired welding strength, and the grounded vessel main body having excellent reliability. 1 can be manufactured.

Further, in the first embodiment, the tip of the gas bushing 5 is disposed closer to the transformer 9 by inclining the main body 1 of the grounding container, so that it is integrated with the gas circuit breaker. The installation area of the transformed transformer 9 can be reduced, and the restriction on transporting the gas circuit breaker can be eased.
Therefore, it is not necessary to send only the gas bushing 5 separately and mount it on site. Therefore, the number of factory assembling steps is increased, the assembling quality is improved, and the transportation cost is reduced, so that an excellent economic effect can be exhibited. In particular, in a "mobile substation" in which a gas circuit breaker integrated with a transformer is mounted on a trailer or the like, the gas circuit breaker moves literally as it is, so that this embodiment with less restrictions on transportation is preferable.
Further, the first embodiment is applied not only to a gas circuit breaker integrated with a transformer but also to a normal gas insulated switchgear.
Since the space between the outlets of the gas circuit breaker can be reduced, the installation area of the device can be reduced.

(2) Second Embodiment A second embodiment is a gas circuit breaker including the invention of claim 3, and as shown in FIG.
Reference numeral 14 denotes a phase-separated gas circuit breaker. The second embodiment is characterized in that the grounded main body portions 1 and 14 are arranged at different angles with respect to the ground 10 for each phase. In other words, the main body 1 of the grounded container is disposed inclined toward the transformer 9, while the main body 14 of the grounded container is
Are arranged vertically with respect to.

According to the second embodiment, the inter-phase insulation distance of the high-voltage portion at the tip of the gas bushing 5 differs not only in the inter-phase direction but also in the main body 1, 1, 14 of the ground vessel different for each phase. Can be considered in consideration of the direction of the arrangement angle. Therefore, the inter-phase distance in the gas circuit breaker can be set to the shortest, and the installation area of the gas circuit breaker can be reduced. Thereby, it is possible to ease the restrictions on transportation during the integral transportation with the transformer 9. Therefore, it is suitable for the case where a gas circuit breaker integrated with a transformer is used as a “mobile substation”, and furthermore, it is possible to improve the quality of factory assembly and reduce costs.

(3) Third Embodiment A third embodiment is a gas circuit breaker according to the fourth aspect of the present invention, as shown in FIG. It is characterized in that the lower surface portion 15a of the located nozzle portion 15 is configured to be horizontal to the ground 10.

Generally, in a gas circuit breaker, a foreign substance 16 is generated from the current interrupting unit 2 when the current is interrupted. When the foreign substance 16 falls, the lower surface 15a of the nozzle 15 in the fall path of the foreign substance 16 Foreign matter 16 adheres and accumulates on the top. At this time, since the lower surface portion 15a of the nozzle portion 15 is horizontal to the ground 10, the foreign matter 16 does not move toward the insulating spacer 17. As a result, the foreign matter 16 is
7, the reliability of the gas circuit breaker can be improved without lowering the insulation performance.

(4) Other Embodiments The present invention is not limited to the above-described embodiment. For example, as shown in FIG. Thus, nozzle sections 11, 12, and 13 having different lengths and different mounting angles to the main body 1 of the grounded vessel may be attached to each phase.

According to such an embodiment, the degree of attachment angle of the nozzle portions 11, 12, and 13 which is widened by inclining the main body 1 of the grounded container with respect to the ground 10 is utilized. In addition, the inter-phase insulation distance of the high voltage portion at the tip of the gas bushing 5 can be considered not only in the inter-phase direction but also in the longitudinal direction of the main body 1 of the grounded vessel or the longitudinal direction of the nozzles 11, 12, and 13. In addition, it is possible to reduce the size of the gas circuit breaker in the inter-phase direction, and it is possible to relax restrictions on the integrated transportation with the transformer.

Further, as a modification of the third embodiment,
The nozzle portion 15 may be configured so that the lower surface portion 15a is at an elevation angle with respect to the ground 10. According to such an embodiment, the lower surface portion 15a serves as a partition between the main body 1 of the grounded container and the transformer 9, and the movement of the foreign matter 16 to the insulating spacer 17 side is reliably prevented. Performance degradation can be prevented.

[0030]

As described above, according to the present invention, the degree of freedom of the mounting angle of the nozzle portion with respect to the ground can be increased by the simple structure in which the main body of the grounded container is inclined with respect to the ground. Since it can be increased, it is possible to take a mounting angle that is advantageous for snow cover measures while obtaining sufficient welding strength,
Furthermore, the inter-phase insulation distance can be ensured, the installation area of the equipment can be reduced, and restrictions on transportation can be eased, so that a gas circuit breaker excellent in reliability and economy can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a gas circuit breaker according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a gas circuit breaker according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a gas circuit breaker according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a gas circuit breaker according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional gas circuit breaker integrated with a transformer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Grounding vessel main trunk | drum 2 ... Current interruption | blocking part 3, 7 ... High voltage conductor 4, 8 ... Stub part 5 ... Gas bushing 6 ... Overhead wire 9 ... Transformer integrated with a gas circuit breaker 10 ... Ground 11 , 12, 13 ... nozzle section with different phase, length and mounting angle 14 ... grounded vessel main body section with different phase and inclination angle with respect to the ground 15 ... nozzle section below current interrupting section 16 ... foreign matter 17 ... Insulating spacer 18 ... snow cover

Claims (4)

[Claims] 1. A grounded vessel main body sealed with an insulating medium is provided, and a current cut-out portion is housed in the grounded vessel main body, and a nozzle section protruding outward is welded to the main body. A high-voltage conductor connected to the current interrupter, wherein the high-voltage conductor is drawn out of the grounded vessel main body via the nozzle section to the outside; A gas circuit breaker, wherein the gas circuit breaker is disposed obliquely with respect to the ground. 2. A transformer-integrated type in which a transformer is provided adjacent to the main body of the grounded container, and the high-voltage conductor drawn out from the main body of the grounded container is directly connected to the transformer. 2. The gas circuit breaker according to claim 1, wherein the main body of the grounding container is arranged to be inclined toward the transformer. 3. 3. A main body portion of a grounded container, which is sealed with an insulating medium, is provided in plurality, and the main body portion of the grounded container has a nozzle section for storing a current interrupting portion and projecting outward. In a phase-separated gas circuit breaker, which is welded, a high-voltage conductor is connected to the current interrupting section, and the high-voltage conductor is drawn out of the grounded vessel main body via the nozzle section. A gas circuit breaker, wherein the main body of the grounded container is arranged such that an angle formed by an axis of the main body of the grounded container and the ground is different between at least one set of phases. 4. When the nozzle portion is welded below the current interrupting portion, a lower surface portion of the nozzle portion is configured to be horizontal or elevated with respect to the ground. The gas circuit breaker according to claim 1, 2, or 3.