JPS5889009A - Mobile sub station - 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] This invention relates to a mobile substation.

As shown in Fig. 1, the conventional type has a plurality of tires (
1) and on the nine frames (21), the high voltage side switchgear (3
), main transformer (4) l low voltage side switchgear (5), mHJJ
The structure is equipped with a transformer (6), a compressed air generator (7) for operating the high voltage side switchgear (3), an air tank (8), etc.), and a tractor (not shown) to the designated location. (2), etc., and is fixed by a fixing device (9) H attached to the underframe (2). The high voltage side switchgear (3) is connected to the high pressure side system (b), and the low voltage side switchgear (2) is connected to the high pressure side system (b).
) are electrically connected to the low-pressure side gun side, respectively, and perform predetermined power conversion by turning on the high-pressure side switching device (3) and the low-pressure side switching device (5). Fig. 2 is a simplified diagram of the t air and air circuits that inject the conventional high voltage side switchgear (3) in a lifting platform that receives power from the high voltage (tUI system (6)).High pressure side switchgear (3) is in a closed circuit state, the electric motor of the compressed air generator (7) (
7a), from the suppression side system (b), the high pressure side switchgear (
3), main transformer (4), auxiliary transformer (6), switching switch (2).

Switch H controlled by the pressure in the air tank (8)
Electric power is supplied through the compressor to drive a compressor (7b) of a mechanically connected compressed air generator to generate compressed air. Compressed air is stored in the air tank (8) and operated by a manual valve.
Alternatively, by operating a control valve (IFK) controlled by a switch αη electrically connected to a DC generation source 961 such as a storage battery, the air tank (8) is connected to a high-pressure side switchgear ( 3) is normally designed to store enough air to supply compressed air about three times without replenishing compressed air.
) is opened, the re-closing circuit is operated by the closing cylinder radar (181) which is mechanically connected to the opening/closing device (3) described above.
This is completed by directing this compressed air to. However, in order to charge from the high-voltage side system (b), the high-voltage side switchgear (3) must be turned on first, but the compressed air for that purpose does not reach the high-pressure side switchgear (3) in an open state. I can't get it. In order to resolve this contradiction, an external power source was required for starting power. For this reason, conventional systems cannot be used in areas where an external power source (II) is not available, and the areas where mobile substations can be used are greatly restricted.

The present invention provides a mobile substation that can operate a switchgear even in places where an external power source is not available by using air from tires provided for mobile use.

The figures will be explained below. In FIG. 3, (1) to α@a are the same as the conventional one. - is tire (1)
The hose has a cap that can be detached from the air valve, tllll is the hose reel that winds up the hose, and K is the pressure that uses the air pressure of the tire to increase the pressure to the pressure required to close the opening/closing device 01 at a predetermined pressure ratio. The conversion device (c) is an on-off valve. In addition, the hose and the pressure converter device are the connecting pipe and the grain pressure converter i! (2) and the on-off valve (c) are connected by a connecting pipe (to), and the on-off valve - and the air tank (8) are connected by a connecting pipe (to).

FIG. 4 shows an example of the air circuit shown in FIG. 3. The pressure converter i-con includes a collector/distributor (22a) that collects air from a plurality of tires (1), a pressure intensifier (22b), and a check valve ( 22C
).

It is composed of on-off valves (22d), (22e), and (22f).

Small cylinder side of pressure booster (22b) and check valve (22c)
The outlet of the on-off valve (zzf) is connected to the air tank (8) by a connecting pipe, and the large cylinder of the pressure intensifier (22b) is connected to the on-off valve (22e) through a connecting pipe (22i).
The other side of the on-off valve (22e) and the inlet of the check valve (22C) are connected by a connecting pipe (22h) to one side of the on-off valve (22d), the other chamber of the on-off valve (22d), and the remainder of the on-off valve (22f). The connection ports of are respectively connected to the collector/distributor (22a) by connecting pipes (22g). In the above configuration, the fixing device ( 9) (It
), and after the connection to the high-pressure side system Qll has been completed, the plurality of hoses are connected to the plurality of tires (1). Here, when the on-off valve (22d) (2) is opened, the tire (1)
The air inside is hose (b)), connecting pipe - 9 sets/min g￥!
C22a) t Connection pipe (22g) + Open/close valve (22
d) , connecting pipe (22h), check valve (22C) y
It flows into the small cylinder of the pressure intensifier (22b) through the connecting pipe. At the same time, the air flows into the air tank (8) through the on-off valve @ and the connecting pipe. Next, when the on-off valve (2ze) is opened, the air from the tire (1) flows into the large cylinder of the pressure intensifier (22b). Pushing the piston in the pressure intensifier (22b) towards the small cylinder, small cylinder and air tank (8)
The air flowing into the tire (1) is blocked by the check valve (22c) and cannot return to the tire (1), so if the diameter of the cylinder and the sliding length of the piston are appropriately selected, the high pressure side can be opened/closed.
The pressure and volume of compressed air required to charge the ctl[(3) can be generated in the air tank (8) without an external power source. As a trial, the volume of the air tank (8) was increased to 10
0()].

The required air pressure is 15 [kg/dG], tire (1)
The total volume is 1200 ()], the air pressure is 6.3 (kg/C
I/lG), if we ignore the effects of piping volume, pressure loss, and temperature, the pressure intensifier (22b) to be selected should have a small cylinder capacity of 160 [)] and a large cylinder capacity of 1.
04G ()] with a pressure ratio (cylinder diameter ratio) of 6.5. If the compressed air in the air tank (8) obtained in this way is guided to the input cylinder redder 04 using the manual valve (I5), the high pressure side switching device (3) will close and power will be supplied from the grid (b). The compressed air necessary for the subsequent operation of the high-pressure side switchgear (3) is produced by the compressed air generator (7) and stored in the air tank (8). By opening the on-off valve (2zf), the tire (1) can be refilled with the amount of air that has been consumed.

Although the above embodiment shows an example in which the opening/closing device is operated by air, the same applies to a device equipped with equipment operated by hydraulic pressure.

According to this invention, the pressure necessary for operating the opening/closing device can be obtained using the air pressure of the tires used for driving, so the opening/closing device can be operated even in places where external power is not available.

[Brief explanation of the drawing]

Fig. 1: Front view of the conventional model; Fig. 2:
FIG. 3 is a front view showing an embodiment of the present invention, and FIG. 4 is a block diagram showing the air/electric circuit of the embodiment of FIG. 3. In the figure, (1) is the tire, (2) is the underframe, (3) is the high voltage side switchgear, (4) is the main transformer, (5) is the low voltage side switchgear, (6) is the auxiliary transformer, (7) is a compressed air generator, (8) is an air tank, and (Foundation) is a pressure converter. Note that the same reference numerals in each figure indicate the same or equivalent parts. Agent Makoto Kuzuno

Claims (1)

[Claims] (1) In a tire that is made movable by supporting an underframe with a predetermined air pressure sealed in it, and each transformer including a switching device that closes the circuit at a predetermined pressure is mounted on the underframe, the above-mentioned tire A mobile substation characterized in that it is provided with a pressure conversion device that increases the pressure at a predetermined pressure ratio to a predetermined pressure necessary for operating the switchgear by using the air pressure of the switch.