JPS60170403A - Enclosed switchboard - 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] Concerning closed switchboards.

[Prior art]

Conventionally, in closed switchboards, partition walls have been installed to partition the inside of the casing-like panel body into storage rooms, such as busbar rooms, cable rooms, and equipment rooms such as circuit breakers, to prevent the accident from spreading to other rooms in the event of an accident. I'm trying to get defense+h.

By the way, the above-mentioned partition wall does not easily deform and is fixed inside the panel body, so holes are provided in the partition wall for the purpose of ventilation when the temperature rises due to internal heat generation of storage equipment, conductors, etc.
The temperature rise at the upper limit of the rated current is suppressed by the rated value plus 'a' by the air intake and exhaust through the hole.

However, according to the conventional closed switchboard, not only is it not possible to ventilate the panel in response to a sudden temperature rise inside the panel due to short-term heavy loads, but also air is constantly circulating due to the holes in the partition wall. In locations with poor environmental conditions, such as locations with corrosive gases, long-term operation will lead to deterioration of internal equipment, and in low and humid conditions, condensation may occur inside the panel, reducing the lifespan and operation of this type of closed switchboard. There are some drawbacks that can cause problems.

[Purpose of the invention]

This invention was made by placing it in the vase described in item 11, and efficiently ventilates the internal air of the panel body when the temperature is high, prevents abnormal temperature rise, and prevents unnecessary ventilation at low temperatures. The purpose is to prevent deterioration, contamination, and condensation of internal equipment due to the influence of the external environment.

[Structure of the invention]

This invention partitions the inside of a panel body in which ventilation holes are formed by a partition wall that deforms into a curved shape when the internal temperature is high to form a passage for cooling air and closes the flow passage when the temperature is low. It is a closed switchboard featuring:

[Effects of the Invention] According to the closed distribution board of the present invention, when the internal temperature becomes high ()ζ due to internal heat generation of equipment in the main body of the board, the partition wall deforms into a curved shape and prevents the flow of cooling air. Since a passage is formed, internal air can be released efficiently, that is, ventilation can be carried out efficiently, and it can also be used for short-time 11Q loads. Also, when the internal temperature becomes low, the partition wall Since it returns to its original shape and closes the above-mentioned circulation/@, it can drastically reduce the leakage caused by the external environment inside the panel body, prevent the internal equipment from working, and prevent condensation or condensation, thereby extending the life of this type of closed switchboard. Stable operation can be expected.

〔Example〕

The present invention will now be described in detail with reference to drawings showing embodiments thereof.

■No. 11 showing examples! W+ to FIG. 3 will be explained.

In these drawings, (1) is a casing-like board body, +2
1, +31, +41, +51, and 161 are flat partition walls that partition the inside of the panel main body fil into an equipment room (7) at the front, a cable room (8) at the rear, and a busbar room (9) at the upper center. Each of the partition walls +21, +31, and +41° (6) is composed of a shape memory alloy plate f/(1) that deforms into a curved shape at high temperatures. At low temperatures that do not exceed the upper limit of the allowable temperature of the material, each partition wall +21, tan, +
41, +61 remain flat, but when the temperature exceeds the upper limit of the allowable temperature, that is, the transformation point temperature of this type of shape memory alloy, each partition wall +21, +31,
+41 and +61 each partially transform into a curved shape whose shape is memorized in advance. For example, as shown in Fig. 3, the front partition wall (2) has screw holes On formed on both sides of the upper and center parts, and screws are passed through these holes to be fixed to the panel body 1). When the temperature is high, the lower side bends forward, and similarly, the rear side of the partition wall (3) bends upward, the upper and lower sides of the partition wall (4) bend backward, and the lower side of the partition wall (5) bends backward. Ru.

(lla) and (llb) are formed at the lower part of the front and rear surfaces of the panel body (1), respectively.
) and an intake hole communicating with the cable room (8), 112)
is formed in the center of the upper surface of the board main body i11 and is a busbar chamber (9).
Exhaust holes (13a) and (13b) are provided through the upper and lower parts of the rear surface of the bulkhead (4) and are located on the power supply side and the load side facing the busbar room (9) and cable room (8), respectively. 3-phase disconnection section, (14) is the equipment room (7
) is stored in a freely drawable manner, and the rear tabs are each double-sided tread portions (13a).

(13b) Devices such as disconnectors, transformers, etc. connected to and separated from (13b)
15) is a three-phase bus drawn into the bus chamber (9), and the connecting conductor 11 is connected to the bus (15) or to the disconnection section (13a).
61 for each phase. (Closed is the cable drawn from below into the cable room t, Irl,
The connection conductor (supported by the support insulator (181) of the partition wall (6)
19), a cable (1η) is connected to the disconnection part (13b) for each phase.

In this type of closed armor switchboard, conductor +16 is connected from the bus bar Ken.
1, disconnection section (13a), equipment 1141, disconnection section (1
3b), 1 current is transmitted via the conductor (19) and cable (17), but this current value is small or the ambient temperature is low and the contents stored in the panel main body fil do not exceed the upper limit of its allowable temperature. In other words, at low temperatures, as shown in Figure 1, the partition walls +21, [31, +41, +61 do not deform, and the air flow between the chambers +71, (81, (91) is blocked, causing unnecessary Operation with reduced ventilation will continue.

At the same time, when the energization DC value increases or the ambient temperature rises and the storage proboscis exceeds the upper limit of the permissible temperature, that is, when the temperature is high, each partition wall (2) as shown in FIG.

+31, +41, 16) are deformed into a curved shape in the order of the partition walls +31-, +41-+61-, and +21, for example, in the order of 1, which has become a high-temperature part, and each chamber (7).

A flow path is formed between +81 and (91). Therefore, the high temperature air in each chamber (71, (8), (9) flows out from the panel through the exhaust hole (12) of the line (9) At the same time, the external relatively low temperature air or both plate pores (lla)
, (1, lb) into the panel body (1), an air flow as shown by the arrow in FIG. 2 is generated, and ventilation is performed.

Tatae is +21, +31, +41 for each bulkhead,
If the transformation point temperature of the +61 shape memory alloy is set to 70°C, each partition wall +21, +31, +41,
+61 undergoes 1lli next metamorphosis from the one at 70℃,
A flow path for cooling air is secured by 7 tons. Moreover, as the OFA degree decreases from this state, each partition wall 121 , +
31, +41, and 161 open to a forward-dimensional shape at [70-α)℃Cα is the hysteresis portion).

According to the above-mentioned embodiment, when the temperature inside the panel body (1) exceeds the normal rated operation, each partition wall +2
1, +31, +41, and +61 operations ensure a flow of cooling air from each source, allowing for efficient ventilation, sufficient resistance to short-term overload, and low-temperature Sometimes each bulkhead (2) ~
(6) Since each room (71, +81, (+11) can be closed and ventilation can be suppressed, it is possible to prevent stored items from becoming deteriorated or soiled due to the influence of the external environment, and also prevent condensation. This can be expected to extend the life of the panel and ensure stable operation.

At this point, the drawings from FIG. 4 onwards showing other fabric examples will be explained.

What is shown in these drawings is a partition wall 12111 that partitions the inside of the panel body (1) and deforms into a curved shape when the internal temperature is high to form a cooling air passage, and also closes the flow passage when the temperature is low. This partition wall (
20) is supported on the frame material (mu) of the board body i11 by a pin 117J inserted into the elongated hole (21), and a shape memory alloy coil that expands at low temperatures and retracts at high temperatures. (2
4) is wound around each pin 1221, and the coil springs (24) press the partition wall 120) toward the frame member (23).

In the past, when the temperature was low, the bulkhead group was strongly pressed by the expansion of the coil spring (24) and held in a flat plate shape, so ventilation could be suppressed, and when the temperature was high, the coil spring I2
4) is transformed into a contracted state with a pre-memorized shape 11
Since the partition wall is deformed into a curved shape by the elastic plate, a flow path for cooling air can be secured and ventilation can be performed efficiently, and the same effects as described above can be obtained.

Note that the present invention is not limited to the above, and for example, contrary to the above embodiment, the partition wall is constructed of a flat elastic plate, and the partition wall is made of a shape memory alloy that transforms at high temperatures. It may also be deformed into a curved shape.

[Brief explanation of drawings]

1 shows an embodiment of the closing distribution board of the present invention;
Figures 1 to 3 show an embodiment, and Figures 1 and 2 are cut-away side views at low and high temperatures, respectively. At the time, the same figure (b
1 shows the partition wall of another example of leprosy, Figure 4 is a perspective view, and Figures 5 (a) and (b) are cutaway side views at low temperature and high temperature. It is. fil-board body, 12+, t3+, +41,
+61, 1201- septum, (lla). (llb)...Intake hole, (12)...Exhaust hole, (24)
Coil splash. Agent Patent Attorney Fuji 1) Ryutabe Figure 1 Figure 2 Figure 29, 5 Figure 3 (G) (b) 0 Figure 5 (0) (b) Figure 4

Claims (1)

[Claims] ■ The interior of the panel body in which ventilation holes are formed is formed by a partition wall that deforms into a curved shape when the internal temperature is high to form a cooling air flow path and closes the flow path when the temperature is low. A closed switchboard characterized by partitions. (2) The closed switchboard according to claim 1, wherein the partition wall that partitions the inside of the board body is made of a shape memory alloy that deforms into a curved shape at high temperatures. (1) The partition wall that partitions the inside of the board body is constructed of a curved elastic plate, and the elastic plate is pressed by a shape memory alloy spring that expands at low temperatures and contracts at high temperatures. Closed switchboards as described in Section.