JPS647546Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a switch that is installed in a distribution line and used to open and close the distribution circuit, and more specifically, a switch that is installed in a power distribution line and used to open and close the distribution circuit. This relates to a multi-circuit gas switch.

This type of switch usually has a lock mechanism to prevent this operation, as opening and closing operations with the arc-extinguishing gas sealed in the case running out poses a serious danger. It is attached to each switch of each circuit. However, such a configuration not only has the drawback of being extremely expensive due to the necessity of multiple locking mechanisms, but also because of its configuration, each locking mechanism must be installed in a location close to its corresponding switch. The problem was that they were often installed in locations that were difficult to confirm.

Therefore, the present invention is designed to eliminate the above-mentioned drawbacks and problems, and even if a device is equipped with a large number of switches, all of them can be locked by a single locking mechanism, and furthermore, the locking mechanism can be It is an object of the present invention to provide a multi-circuit gas switch that can be installed at any location where each piece can be easily checked.

The drawings showing the embodiments of the present application will be described below. In FIG. 1, reference numeral 1 denotes a hand hole, which is buried in, for example, a sidewalk, and its size is approximately 1 meter on each of the two sides of the opening, and 1 meter and several tens of centimeters deep. 2 indicates a conduit.
Next, 3 is a stand installed at the bottom of the hand hole, 4
shows a multi-circuit gas switch installed on the pedestal 3. In this multi-circuit gas switch 4, a case 5 is made of stainless steel and has a completely airtight and watertight structure. Further, the inside of this case 5 is filled with arc-extinguishing gas (SF ₆ ). 6 indicates a protrusion in the case 5. 7, 8, 9 are well-known switches housed in the case 5, 10, 1
Reference numerals 1 and 12 denote opening/closing operation handles, which are connected to movable parts of switches 7, 8, and 9, respectively. These opening/closing operation handles 10, 11, 12 are formed short as shown in the figure so that they cannot be operated by hand. 13, 14, 15 are sealed cases, opening/closing operation handles 10, 11, 12, respectively.
It is designed to cover the linkage mechanism between the movable parts of the switches 7, 8, and 9. Note that 16, 16... are bushings attached to the case 5, and the switches 7, 8
Alternatively, it is connected to 9 as is well known. Reference numeral 17 indicates a connector detachably attached to the bushing 16, and reference numeral 18 indicates a well-known underground power distribution cable connected to the connector 17.

Next, reference numeral 20 indicates an operating lever, 21 indicates a storage section, and 22 indicates a lock mechanism.
This will be explained in detail with reference to the drawings and FIG.

First, in the operating rod 20, 23 indicates the main body,
It is formed into a rod shape. 24 indicates a fitting part connected to the tip of the main body, and the opening/closing operation handle 10, 1
It is configured such that it can be freely attached to and detached from 1 and 12.
25 indicates a stepped portion. Next, in the storage section 21, the 2
6 is a holder fixed to the sealed case 14; 27;
28 is a guide plate, which guides the operating rod 20 in the direction of extraction.

Next, in the lock mechanism 22, 29 is a display window;
30 is a locking piece, which has a well-known protrusion mechanism (for example,
The wall of the case 14 is provided with a bellows that operates when the gas in the case is depressurized, and this and the lock piece 30 are connected by a link, so that when the gas in the case is depressurized, the bellows is activated. In response to the operation, the tip of the locking piece 30 opens the display window 29.
Similar to the mechanism that protrudes from the display window 29, the display window 29 can be freely moved in and out of the display window 29. Further, this lock piece 30 is positioned opposite to the stepped portion 25 of the operating rod 20 when it protrudes from the display window. This lock piece 30 also serves as an indicator that the arc-extinguishing gas in the case 5 has escaped. The locking mechanism 22 detects, as is well known, that the gas in the case 5 has escaped, and when this is detected, the locking piece 30 protrudes as shown in FIG. 3, as is well known. It is housed within the protrusion 6 of the case 14 and the case 5.

With the above configuration, a plurality of switches 7, 8,
When operating the opening/closing operation handles 10, 11, and 12 of No. 9, remove the operation rod 20 from the storage section 21 and place the fitting section 24 over the handle of the desired switch as shown in FIG. It is sufficient to connect the rods 20 and open/close the switches.

If the arc-extinguishing gas in the case 5 has escaped when attempting to open and close the case 5, the lock mechanism 22 will operate and the lock piece 30 will open.
are located as shown in FIG. Therefore, the operating rod 20 cannot be pulled out from the storage portion 21, and erroneous opening/closing operations of all the opening/closing operation levers 10, 11, 12 can be prevented.

As described above, in this invention, when the arc-extinguishing gas has escaped from the case 5 and the switch must not be operated, the lock piece 30 is attached to the case, so that it cannot be operated. It is possible to prevent the operation rod 20 for operating the opening/closing operation handles 10, 11, 12 of each switch from coming off from the storage part 21, thereby preventing the operation handles of the plurality of switches 7, 8, 9 from coming off. A similar effect can be obtained by locking all switches 10, 11, and 12, and there is safety in that erroneous operation of all switches can be prevented. Moreover, in that case, since the operation lever 20 is locked as described above, all the opening/closing operation handles 10, 1
Locks 1 and 12 can be performed by simply operating one lock piece 30, and the structure is simple and can be provided at low cost. Furthermore, the lock piece 30 can be installed at any convenient position away from the operating handles 10, 11, and 12 without being restricted by the operating handles 10, 11, and 12, ensuring safety during use. There are also effects that can be made possible.

Furthermore, in the present invention, when the operator opens and closes each switch, the operation handles 10, 1
Since the operating rods 20 are attached interchangeably to 1 and 12, the operator can operate each switch one by one, and each switch can be operated reliably. It also has the effect of allowing you to perform certain operations.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a front view showing the installed state, FIG. 2 is a partially cutaway front view showing the relationship between the operating rod, the storage section, and the lock mechanism, and
The figure is a perspective view of the same, and FIG. 4 is a diagram for explaining the opening/closing operation. 5... Case, 7, 8, 9... Switch, 10,
11, 12... Opening/closing operation handle, 20... Operating rod, 21... Storage section, 22... Lock mechanism.

Claims (1)

[Scope of utility model registration request] A plurality of switches are built into the case filled with arc-extinguishing gas, and each of the plurality of switches is connected to an opening/closing operation handle, and these handles are exposed to the outside of the case. In the multi-circuit gas switch, each of the opening/closing operation handles is formed in a short size that is difficult to operate by hand, and the case is provided with one operation rod that can be attached to the plurality of handles interchangeably. Prepare,
Further, the case is provided with a storage section in which the operating rod can be stored, and the operating rod is detachably attached to the storage section, and the case is further provided with an arc-extinguishing gas inside the case. A locking piece is provided for protruding when the pressure is reduced, and the position of the locking piece is set at a position where the locking piece locks the operating rod when the locking piece is in the protruding state. Circuit gas switch.