JPH0119528Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a drawer-type disconnector with an elevating device that is housed in a double busbar type switchboard chamber and used.

[Conventional technology]

In the case of conventional drawer-type disconnectors of this type,
When switching circuits on a switchboard, the disconnector was immediately removed outside the switchboard, raised and lowered, and then stored inside the switchboard.

FIG. 1 shows an example of the configuration of a conventional draw-out type disconnector of this type. Reference numeral 1 denotes a power supply side terminal attached to a switchboard 10. Load side terminals 2 and 3 are attached. On the other hand, the trolley 4 has a bow section 5,
A breaker consisting of a closing operation part 6 and connection terminals 7 and 8 of the breaker is mounted. When switching a circuit in which terminals 7 and 1 and terminals 8 and 3 are connected in such a case, the circuit must be disconnected from the position where the circuit is connected, that is, the operating position. position, i.e.
Once the cart 4 is moved to the test position, it is carried outside from the test position and transferred to an elevating cart such as a lifter, and after being lifted to a predetermined position, it is carried indoors again and terminals 8 and 1 and terminals 7 and 2 are moved. Connect each. In addition, in FIG. 1, 9 is a vacuum valve.

[Problems that this invention attempts to solve]

However, in the case of such disconnectors, when switching operations, it not only requires the complicated work of transporting the trolley outside, transferring it to the lifting trolley, lifting it, and then transporting it indoors again. Since these works are carried out outdoors in narrow passageways, there are problems with workability and safety. In other words, the opening/closing door of the room has many protrusions such as control equipment and wiring, and furthermore, the lifting trolley to which the directional vehicle is attached is a simple one, although it is equipped with a movement prevention device. Moreover, since the manual winding method of winding the wire around a drum is generally used as a lifter, when moving heavy objects such as wire cutters and disconnectors, it is unstable and dangerous, and the protrusions attached to the door must be removed. There was also a risk that it would be damaged.

The purpose of this invention is to eliminate the above-mentioned drawbacks, and to install an elevating device on the pull-out trolley for the cut-out circuit breaker housed in the double busbar type switchboard, so that the replacement operation of the cut-off switch when switching circuits can be carried out inside the switchboard. To provide a pull-out type sheath disconnector with an elevating device that allows the user to move the machine.

[Means for solving problems]

That is, the present invention provides a pull-out type disconnector that is housed in a double busbar type switchboard chamber and has a pull-out trolley for insertion into or pulling out from the switchboard chamber, and includes a pullout section that opens and closes the current of the circuit; an operating section for controlling opening and closing of the opening/closing contact; an elevating device placed on the pull-out cart for elevating the sheath cutting section and the operating section between predetermined lower and upper positions; and an operating shaft of the elevating device. an interlock cover that opens and closes the operation handle connection; a first interlock device that allows opening and closing of the interlock cover only when the drawer cart is in the test position; and a first interlock device that locks the drawer cart in the operating position and the test position. and a second locking device that unlocks the locking device and allows movement of the drawer cart only when the sheath section is broken.
a third interlock device that allows the closing operation of the operating section only when the drawer cart is locked by the locking device in the operating position and the test position; The present invention is characterized in that a fourth interlock device is provided that allows the lock device to be unlocked in the test position only when it is in the upper position.

[Effect]

Therefore, according to the present invention, not only can the switching operation of the circuit breakers associated with circuit switching be performed within the switchboard room using the elevating device installed on the pull-out trolley, but also the interlock device allows operations to be performed at locations other than the testing position. Elevating and lowering is prohibited, and furthermore, moving the pull-out trolley when the shield disconnector is not disconnected, inserting the shield disconnector while the pull-out trolley is moving, and moving the pull-out trolley while it is being lifted and lowered is prohibited. .

〔Example〕

The present invention will be explained below based on the drawings.

2A and 3B and 3A and 3B show an embodiment of the shingle disconnector of the present invention, in which FIG. is the case where the circuit is connected in the upper stage. A cart with a lifting device (hereinafter referred to as a cart) 11 includes a circuit sheath disconnection section 12, a closing operation section 13, and a worm mechanism section 14.
Place the
are two guide shafts 16 fixed to the truck frame 15.
It should be possible to go up and down along the

That is, the worm mechanism section 14 is attached to the frame 17 fixed to the trolley 11, and the worm mechanism section 1
An operating section frame 19 housing the operating section 13 and a shingle section frame 20 housing the shingle section 12 are fixed to the elevating frame 18 of No. 4.
The above-mentioned guide shaft 16 is made to slide within four bearings 21 (see FIG. 2A) fixed to the shaft. These two guide shafts 16 are arranged along the truck frame 15 as shown in FIG. 2B.

Further details will be given with reference to FIGS. 4 and 5.
An operating shaft 3 that rotates via a handle (not shown)
1, a worm 32 is fixed and meshed with a worm gear 34 fixed to a main shaft 33.
is rotatably supported by a frame 17 fixed to a truck 11. One end of a lever 35 is fixed to both ends of the main shaft 33, a roller 36 is rotatably attached to the other end of the lever 35, and the roller 36 is fitted into a guide groove 37 provided in the lower part of the lifting frame 18. .
Therefore, when the lever 35 rotates as the main shaft 33 rotates, the aforementioned roller 36 moves into this guide groove 37.
The elevating frame 18 rises while rolling.

As shown in FIG. 3A, a stopper 100 is attached to prevent the lever 35 from rotating further counterclockwise when the circuit is connected in the lower stage of the switchboard room. Further, as shown in FIG. 3B, when connecting a circuit in the upper stage of the switchboard room, a stopper 101 is used to prevent the lever 35 from rotating further clockwise.
Attached. As shown in FIG. 6, the upper stopper 101 is arranged so that the lever 35 contacts and stops at a position where the lever 35 has rotated clockwise by θ degrees (3 to 4 degrees) from the vertical position. The stopper 100 on the lower stage side is arranged so that the lever 35 comes into contact with the vertical position and stops.

On the other hand, as shown in FIGS. 4 and 5, an interlock cover 42 having a notch 42A and fixed to the shaft 41 is disposed on the handle operation side of the operation shaft 31, and the interlock cover 42 is fixed to the shaft 41 during normal operation. It covers the handle connection portion of the shaft 31. Lever 43 fixed to cover 42
When the interlock cover 42 is rotated 90 degrees clockwise, the handle connecting portion of the operating shaft 31 is exposed through the notch 42A. Further, when the cover 42 is released from the clockwise rotation, the cover 42 is rotated counterclockwise by the spring force of a spring (not shown) to cover the handle connection portion of the operating shaft 31.

A shaft 41 to which this interlock cover 42 is fixed
is pivotally supported by a bracket 44 fixed to the frame 17, and connected to a lock bar 47 via a lever 45 and a pin 46. However, the fourth
In the state shown in the figure, when the shaft 41 is rotated clockwise, the lock bar 47 is lowered, but only when the cart 11 is in the test position (the position shown in FIG. 5) is the lock bar 47 inserted into the hole 49 drilled in the blade 48. In other operating positions and in the middle of pulling out, the lowering of the lock bar 47 is lower than that of the lock plate 4.
8 prevents the handle from being attached to the operating shaft 31.

On the other hand, the main shaft 33 has a half-moon-shaped lock plate 5.
A lock lever 51 is fixed to the shaft 41 in association with a lock plate 50. That is, when the lifting frame 18 is in the upper or lower predetermined position, that is, when the lock plate 50 is in the position shown by the solid line or the dashed line in FIG.
Even if the interlock cover 42, which has been rotated 90 degrees, is rotated counterclockwise, the lock lever 51 is prevented from coming into contact with the lock plate 50, and when the operation handle is removed during the ascent and descent, the position shown in FIG. The lock plate 50 prevents the lock lever 51 from rotating counterclockwise at _P1 . In other words, the tip of the lock bar 47 is in the hole 4 of the plate 48 during the ascent and descent.
9, it is not possible to pull out the breaker to the operating position or to the outside.

Further, in FIG. 5, 52 is an unlocking lever, and a bracket 53 fixed to the truck frame 15
is attached via a pin 54 to the unlocking lever 52.
A lock bar 56 is connected to the end of the lock bar 56 via a pin 55. Here, when the trolley is in each position, the lock bar 56 Holes 57 and 58 are formed in the lock plate 48 so that the holes 57 and 58 fit thereinto, respectively. A support 60 in which a long hole 59 with a diagonal portion is formed is fixed to the upper end of the lock bar 56. Further, a shaft 62 is rotatably attached to a bearing 61 fixed to the frame 19. This axis 6
2 has a pin 63 on the lower part, and a lever 6 on the upper part.
4 is fixed, and the pin 63 is supported through the long hole 5 of the support 60.
Let it pass through to 9. As a result, lock bar 6
When the pin 63 moves up and down, the pin 63 slides in the elongated hole 59 following its shape, and as shown in FIG. 7, the shaft 62 is rotated by 30 degrees in this example.

In FIG. 5, levers 65, 66, and 67 in the operating part frame 19 are used to open and close the vacuum valve (see FIG. 3A) of the shingle section 12, and for example, when the vacuum valve is closed, , that is, when each of the levers 65 to 67 is in the position shown by the solid line, the tripping coil 68
When the lever 67 is rotated to the position _P10 shown by the broken line, the levers 65 and 66 are moved in conjunction with this, thereby opening the vacuum valve. Here, referring to FIG. 8, when the vacuum valve is closed, even if an attempt is made to rotate the shaft 62, the lever 64 fixed to the shaft 62 comes into contact with the lever 67, causing the shaft 62 to rotate.
Make sure that it does not rotate. In other words, when the breaker is closed, the unlocking lever 52
cannot be rotated and the locking bar 56 remains inserted into the hole 57 or 58 of the locking plate 48, thus making it impossible to move the cutter from the operating position to the test position or from the test position to the operating position. I can't.

Further, when the unlocking lever 52 is rotated to the position _P11 indicated by the dashed-dot line in FIG. 5, the rod 69 (see FIG. 8) fixed to the lever 64 rotates the interlock lever 70, thereby The interlock lever 70 energizes the interlock switch 71 to electrically prevent the closing operation, and
Since the interlock lever 70 locks the latch 72, the closing operation is also mechanically prevented. In other words, when pulling out the cutter, i.e.
When it is being pulled out from the operating position to the test position, or when it is being inserted from the test position to the operating position, the closing operation of the shield breaker is electrically and mechanically blocked.

A case where the drawer-type disconnector configured in this way is switched from the lower stage of the switchboard room to the upper stage will be described below. First, after manually opening the breaker, the unlocking lever 52 is rotated counterclockwise and the lock bar 56 is pulled out from the hole 57. At this time, as shown in Figure 5 (note that Figure 5 shows the test position,
The only difference is that the lock bar 56 is inserted into the hole 58, and the subsequent state is the same as the operating position. ), the lever 67 is in position _P10 , so the lock bar 56 can be pulled out. Next, the trolley 11 is pulled out to the test position. In this test position, the lock bar 47 connected to the cover 42 faces the hole 49 in the plate 48, so the interlock cover 42 can be rotated clockwise, thereby opening the notch in the cover 42. The operating shaft 31 appears in the section 42A.

Here, when the handle is fitted into the operating shaft 31 and rotated clockwise, the main shaft 33 is rotated clockwise in FIG. 5 via the worm 32 and the worm gear 34, and the lever 35
rotates in the same direction, that is, toward the front in FIG. At this time, the roller 36 attached to the tip of the lever 35 moves against the lifting frame 18.
The lever 35 rotates while rolling in the guide groove 37 of the lever 35.
The lifting frame 18 is raised until it is stopped by the upper stopper 101 (see FIG. 3B). The elevating frame 18 rises while sliding on the guide shaft 16 via the bearing 21, and reaches a predetermined position for connecting the upper stage. Next, the handle is removed, the cover 42 is returned to its original position, the cart is moved to the operating position, and the circuit is connected in the upper stage.

As shown in FIG. 6, the value 2l, which is twice the distance l between the axis of the main shaft 33 and the axis of the roller 36, is the lifting distance of the lifting frame 18, and this distance l
By changing , the lifting distance can be changed. Also, referring to FIG. 6, lever 3
If ΔH ₁ is the amount of movement in the vertical direction when 5 is rotated by θ degrees near the vertical position, and ΔH ₂ is the amount of movement in the vertical direction when it is rotated by θ degrees near the horizontal position, ΔH ₂ > ΔH ₁ Therefore, when switching the circuit of the insulation breaker, it becomes easy to align the connection terminals of the insulation breaker and the switchboard. It is particularly effective for pull-out type disconnectors with small positional deviation tolerances in the vertical direction, such as horizontal blade type and tulip type connecting terminals.

Next, the interlock device provided in the shield disconnector of the present invention will be explained.

(1) Interlock device that prohibits lifting and lowering at positions other than the test position When the trolley 11 is located at a position other than the test position, even if you try to rotate the interlock cover 42 clockwise as shown in Fig. 4, the lock bar will not move. The tip of 47 is a hole 49 bored in plate 48.
The interlock cover 42 cannot be rotated to the specified position. Therefore, when the operating handle (not shown) cannot be connected to the operating shaft 31 and the elevating cart 11 is located at a position other than the test position, the elevating frame 18 cannot be moved up and down.

(2) When the shield breaker is not disconnected, an interlock device is installed that prohibits the withdrawal or insertion of the shield breaker, as shown in Figures 3A and 5. When the unlocking lever 52 is rotated counterclockwise by stepping on the lock lever 52 in this position, the lock bar 56 tries to rise via the pin 55. The rotation of the lever 64 fixed to the shaft 62 which can be interlocked with the lever 64 is prevented by the lever 67 of the operating section (see FIG. 8), and the lock bar 56 is inserted into the hole 57 or 5 of the plate 48
It cannot be extracted from 8. Therefore, trolley 1
1 is in the operating position or test position, and
When the breaker is in the closed state, the trolley 11 is locked and cannot be moved.

(3) Interlock device that prohibits insertion of the cutter or disconnector during withdrawal or insertion When the trolley 11 is in an intermediate position other than the operating position and the test position, that is, when the trolley 11 is movable, the lock bar 56 is activated. A lever 64 located at the top of the range and interlocking with this lock bar 56 is rotated counterclockwise (the position indicated by the dashed line in FIG. 8), and a rod 69 fixed to this lever 64 moves the interlock lever 70. Fifth
In the figure, it is rotated counterclockwise to mechanically and electrically prevent input as described above.

(4) Interlock device that prohibits movement during elevation/descension When the machine was being lifted or lowered at the test position, the handle was removed from the operation shaft 31 and the interlock cover was tried to return to its original position, but the interlock cover stuck to the shaft 41. Since the lock lever 51 comes into contact with the half-moon-shaped lock plate 50 fixed to the main shaft 33, rotation of the shaft 41 is prevented, and therefore the lock bar 47 cannot be pulled out from the hole 49.
Insertion into the operating position is prohibited during ascending and descending.

[Effect of idea]

As explained above, according to the present invention, an elevating device is provided on the pull-out cart for the shingle disconnector stored in the switchboard chamber of the double busbar type, and the elevating device is connected by the interlock mechanism between the shingle disconnector and the busbar. Since it is possible to go up and down only when the connection is disconnected, it is possible to replace the disconnector when switching circuits inside the switchboard, reducing the danger associated with circuit switching work, and making it possible to move indoors and outdoors. Safe and reliable circuit switching operations can be performed without damaging items.

Furthermore, if the elevating device is composed of a worm and a worm gear, the shield cutter is prevented from descending due to its own weight in the upper position or in the middle of ascending and descending, thereby eliminating the need for a conventional descending restraint device using its own weight. It is possible to safely hold the shinobu disconnector.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing a conventional draw-out type disconnector inserted into a switchboard chamber, Fig. 2A is a configuration diagram showing an embodiment of the draw-out type disconnector of the present invention, Fig. 2 B is its plan view, and Figure 3 A is Figure 2 A.
Figure 3B is a configuration diagram showing the state in which the disconnector shown in Fig. 3 is housed in the lower level of the switchboard room, Figure 3B is a configuration diagram showing the state in which it is also housed in the upper level, and Figure 4 is an enlarged view of the main part of Figure 2A. FIG. 5 is an enlarged configuration diagram of the main part of FIG. Figure 8 is a sectional view taken along line B-B in the figure, and Figure 8 is A-A in Figure 4.
FIG. 1, 2, 3...Power supply side terminal, 4...Dolly, 5...
...Shining section, 6... Closing operation mechanism section, 7, 8...
Connection terminal on the disconnector side, 9... Vacuum valve, 10...
Switchboard, 11... Cart with lifting device, 12... Circuit cable break section, 13... Closing operation part, 14... Worm mechanism part, 15... Cart frame, 16... Guide shaft, 17... Frame, 18... Lifting frame, 19... Operation section frame, 20... Sheath section frame, 21, 61... Bearing, 31... Operation shaft, 32... Worm, 33... Main shaft, 34...
Worm gear, 34, 43, 45, 64, 65,
66, 67...Lever, 36...Roller, 37...
... Guide groove, 41, 62 ... Shaft, 42 ... Interlock cover, 42A ... Notch, 44 ... Bracket, 46, 54, 55, 63 ... Pin, 47
... Lock cover, 48 ... Plate, 49,5
7, 58...hole, 50...lock plate, 51
...Lock lever, 52...Unlock lever, 53...
... Bracket, 56 ... Lock bar, 59 ... Long hole, 60 ... Support, 68 ... Trip coil, 69 ... Rod, 70 ... Interlock lever, 71 ... Interlock switch, 72 ... Latch, 100, 101...stoppa.

Claims (1)

[Scope of utility model registration request] In a drawer-type disconnector housed in a double busbar type switchboard chamber and having a pull-out trolley for insertion into or pulling out from the switchboard chamber,
A shield section for opening and closing the current of the circuit, an operation section for controlling opening and closing of the switching contact, and a lever section placed on the pull-out cart and for moving the shield section and the operation section between a predetermined lower position and an upper position. A lifting device for raising and lowering the lifting device; an interlock cover for opening and closing the connection portion of the operating handle of the operating shaft of the lifting device; and a first interlock device for allowing the opening operation of the interlock cover only when the drawer cart is in a test position. , a locking device that locks the drawer cart in the operating position and the test position, and a locking device that unlocks the locking device and allows movement of the drawer cart only when the sheath section is severed. 2 interlock device;
a third interlock device that allows the closing operation of the operation unit only when the drawer cart is locked by the locking device in the operating position and the test position, and when the lifting device is in the lower position and the upper position; A drawer-type sheath disconnector with an elevating device, characterized in that a fourth interlock device is provided that allows the locking device to be unlocked only at the test position.