JPS6322122B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a megger ring device, etc. that detects the position of the switch in the switchboard and measures the insulation resistance of the load-side electrical circuit in a drawer-type switch storage switchboard. This relates to a driving operating mechanism.

A conventional device for detecting the position of a switch in a switchboard is shown in FIG. In the figure, 1 is a guide having square holes 1a, 1b, round holes 1c, 1d, 1e, 1f, and a notch 1g; 2 is a guide having notches 2a, screw holes 2b, 2c, and a round hole 2d; The rod is attached to slide horizontally using holes 1a and 1b as guides, and 3 is the round hole 2 of rod 2.
d is attached to the stopper pin, 4 is a bolt screwed into the threaded hole 2c of the rod 2, 5 is attached to the bolt 4 at one end, and the other end is attached to the round hole 1e of the guide 1,
1f is attached to a tension spring that urges the rod 2 in the left horizontal direction in the figure and is attached so that the stopper pin 3 comes into contact with the guide 1; 6 has a roller 6a; A test position detecting switch is mounted so that the roller 6a is located on the notch 2a of the rod 2 in a state of contact, 7 is an operating position detecting switch having a roller 7a, 8 is the test position detecting switch 6 and A screw 9 for attaching the operating position detection switch 7 to the guide 1 is an adjustment screw that is attached to the screw hole 2b of the rod 2 and for adjusting the horizontal movement distance of the rod 2.

2 and 3 show a conventional megger ring device, FIG. 2 being a side view thereof, and FIG. 3 being a front view thereof as seen from the cable room side of a switchboard. Figure 2,
In Fig. 3, 10 is the box of the switchboard, 11 is the switch room, 12 is the cable room, and 13 is the switch room 11.
and the cable room 12, and 14 is the partition wall 13.
15 is a guide attached to the cable room side of the bulkhead 13,
Reference numeral 16 designates a rod that is attached to be slidable in the horizontal direction using guides 14 and 15 as guides, and reference numeral 17 is a stopper pin that is attached to rod 16 to stop the rod 16 from moving to the left in the figure at a predetermined position. . 18 is a mega ring device return spring;
Reference numeral 19 is a spring receiver for mounting the return spring 18. 20 is a cable whose one end is connected to the cable chamber conductor; 21 is a fixed contact to which one end of the cable 20 is connected; 22 is an insulating support material; 23
24 is an adjustment washer inserted between the fixed contact 21 and the insulating support material 22, and 24 is the insulating support material 22.
This is a bracket for installing the . 25 is a detection switch for detecting the operation of the mega ring device;
6 is a bracket for mounting the switch 25 mentioned above. 27 is a bearing attached to both inner surfaces of the cable chamber side of the box 10 of the switchboard; 28 is a shaft rotatably attached to the bearing 27 at both ends; 29 is a pin attached to one end of the rod 16; 30 is a shaft An oval hole 30a is provided at one end, and is engaged with the rod 16 through the oval hole 30a and the pin 29, and the other end is a lever fixed to the shaft 28 by welding or the like. Reference numeral 31 is a lever to which the return spring 18 is attached at one end, and the other end is fixed to the shaft 28 by welding or the like. 32 is a movable contact molded from a conductive spring material, 33 is a conductive bracket for mounting the movable contact 32, and 34 is an insulating support material to which the conductive bracket 33 is attached. 35 is a cam plate that operates the switch 25; 36 is a cam plate that connects the insulating support member 34 and the cam plate 3 to one end;
5 is attached, and the other end is a bracket fixed to the shaft 28 by welding or the like. A cable 37 has one end connected to the conductive bracket 33 and the other end connected to an insulation resistance measuring terminal (not shown).

Figures 4 and 5 show the installation state of a conventional position detection device and mega ring device in a power distribution board, where Figure 5 is a side view and Figure 4 is a plan sectional view taken along the line - Figure 5. . In FIGS. 4 and 5, reference numeral 38 denotes a drawer-type switch, and its operating position, which is a normal insertion position, is shown by a solid line, and its test position (drawn-out state) is shown by a chain line. Reference numeral 39 is a push plate for driving the position detection device attached to the side surface of the drawer-type switch 38. The position detection device shown in FIG.
A guide 1 is installed on the inner side of the switch chamber 11 of the switchboard box 10.
The round holes 1c and 1d of are fixed with screws (not shown), and the test position of the drawer type switch 37 (Fig. 4,
The adjusting screw 9 is attached so as to come into contact with the push plate 39 at a position where the stopper pin 3 comes into contact with the right side surface of the guide 1 (indicated by the dashed line in FIG. 5). In addition, the contact portion between the drawer type switch 38 and the megger ring device drive rod 16 is such that the stopper pin 17 is attached to the guide 15 in the test position of the drawer type switch 38 (the position shown by the dashed line in Figs. 4 and 5). They are in the abutting state (the state shown in Figure 2) and then separated.

Next, the operation of the conventional position detection device will be explained. In Figures 4 and 5, the drawer type switch 3
7 is in the test position (the position shown by the dashed line in FIGS. 4 and 5), the roller 6a of the test position detection switch 6 is on the notch 2a of the rod 2 (the first
State shown in the figure) It is detected that the drawer type switch 38 is in the test position. Next, when the drawer type switch 38 is inserted from the test position to the operating position by a drawer insertion device (not shown), the rod 2 moves as shown in FIGS. The roller 6a of the test position detection switch 6 moves to the right in the figure while biasing the tension spring 5.
The rod 2 is removed from the notch 2a, and the test position detection switch 6 is turned OFF. When the drawer type switch 38 reaches the operating position (the position shown by the solid line in Figs. 4 and 5), the notch 2a of the rod 2 reaches the position of the roller 7a of the operating position detection switch 7, The switch 7 is turned on and detects that the drawer type switch 38 is in the operating position. Next, when the drawer type switch 38 is pulled out from the operating position to the test position by the drawer insertion device, the rod 2 moves to the left in FIGS. 4 and 5 as the drawer type switch 38 moves due to the biasing force of the tension spring 5. The notch 2a of the rod 2 is removed from the roller 7a of the operating position detection switch 7, and the operating position detection switch 7 is
It will be turned off. When the drawer type switch 38 reaches the test position, the notch 2a of the rod 2 reaches the position of the roller 6a of the test position detection switch 6, the test position detection switch 6 is turned on, and the drawer type switch 38 returns to the test position. to detect that

Next, the operation of the conventional mega ring device will be explained. When pulling out the drawer type switch 38 from the normal operating position to the test position, lever 30, lever 3
1, bracket 36, cam plate 35, insulating support material 3
4. The conductive bracket 33 and the movable contact 32 are rotated counterclockwise around the shaft 28 by the tensile force of the return spring 18, and the detection switch 25 attached to the bracket 26 is rotated counterclockwise on the cam plate 35. By rotating in the direction, the cam plate 35 and the roller (not shown) of the detection switch 25 are disengaged, and
The position switch 25 is in the OFF state. In addition, the movable contact 32 contacts the fixed contact 21 and is elastically deformed to obtain contact pressure with the fixed contact 21, and the stopper pin 17 is held in contact with the guide 15. Due to regulations, it is held at the position indicated by the dashed-dotted line in FIGS. 4 and 5. The drawer-type switch 38 further moves to the left, and the fourth
The rod 16 is pulled out to the position indicated by the dashed line in FIGS. 5 and 5, and the engagement between the rod 16 and the drawer-type switch 38 is completely disengaged. When the drawer-type switch 38 is in the test position, an insulation resistance measuring device (not shown) is connected to the other end of the cable 37 whose one end is connected to the conductive bracket 33, and the load system connected to the cable 20 is connected to the other end of the cable 37. Perform insulation resistance measurement (meggering). Next, when the drawer type switch 38 is inserted from the test position to the operating position, the rod 16 comes into contact with the drawer type switch 38 during insertion, and the insertion force of the drawer type switch 38 causes the rod 16 to move as shown in FIG. Fourth
In FIG. 5, it is driven in the right horizontal direction. As the rod 16 moves to the right, the lever 30 engaged with the pin 29 attached to the rod 16 rotates clockwise about the shaft 23, and similarly the lever 31, the bracket 36, the cam plate 35, The insulating support member 34, the conductive bracket 33, and the movable contact 32 similarly rotate clockwise about the shaft 28. As a result of the above operation, the return spring 18 is stretched, the biasing force is increased, the movable contact 32 is separated from the fixed contact 21, the cam plate 35 operates the position switch 25, and the movable contact 32 moves away from the fixed contact. 21 is detected, the insulation resistance measurement is canceled, and the drawer type switch 38 is enabled to operate.

Conventional position detection devices directly transmit the travel distance of the switch to the rod, so the installation interval between the test position detection switch and the operation position detection switch is the same as the travel distance between the test position and the operation position of the switch. Not only does the equipment itself become larger, but most of the components must be changed if the travel distance of the switch is different, and if the travel distance is long, most of the components will be larger. Furthermore, the position detection switch drive rod moves back and forth in the same way as the switch, and the depth dimension occupied by the position detection device also becomes large.

In addition, the conventional type has many components and is complicated, and it is very difficult to assemble and adjust it from the cable room side using adjustment spacers.Also, since the megger ring device driving rod moves linearly, it is difficult to assemble and adjust it from the cable room side. The ring device requires a large space, the entire switchboard is large, and maintenance and inspection must be performed from the cable room, making maintenance and inspection very difficult. In addition, because the contact of the mega ring contact part relies on the elastic force of the conductive spring material, there is a large variation in contact pressure, and it takes a lot of time to adjust the contact pressure, making the entire device expensive. If the ratings of the switches are different, if the travel distance of the switch is different, there are disadvantages such as the need to change most of the components, and the position detection device and megger ring device are installed in different locations. Because of this, each adjustment has to be done separately, which requires a lot of time to assemble, adjust, etc., and it also has the disadvantage of increasing the number of parts, such as duplication of parts with the same function. .

This invention eliminates the drawbacks of the conventional ones as described above, and makes it possible to easily operate a position detection device that is linked to the insertion and withdrawal of a switch, and a mega ring device that is linked to this. insertion of,
The horizontal movement rod that operates the position detection switch in conjunction with the withdrawal operation is driven by a rotating arm that is connected to the insertion of the switch and the withdrawal operation, and a spring material that separately provides contact pressure for the movable contact that is interlocked with this arm. Furthermore, by installing the entire drive mechanism in the switchboard or disconnection chamber, it is compact and easy to assemble, adjust, and maintain and inspect, and the contact pressure of the megger ring device is highly reliable. The purpose of this invention is to provide an operating mechanism for a switchboard that is more compact, less expensive, and highly reliable for the entire switchgear.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 6 is a plan view of a position detection device that also serves as a megger ring device, FIG. 7 is a front view of the switchboard viewed from the switch chamber side of the switchboard, and FIG. 8 is a perspective view of the components of the device. In these figures, 40 is a square hole 40a,
40b, an oval hole 40c, screw holes 40d, 40e, and a round hole 40f. 6 has a roller 6a and a mounting hole 6b, and is a test position detection switch attached to the screw hole 40d of the guide 40 with a screw (not shown); 7 has a roller 7a and a mounting hole 7b; This is an operating position detection switch that is attached to a screw hole 40d of No. 40 with a screw (not shown). 41 is a round hole 41
a, 41b and a notch 41c, and is attached so as to slide in the horizontal direction using the square holes 40a, 40b of the guide 40 as guides; 3 is the rod 41;
The square hole 4 of the guide 40 is attached to the round hole 41a of the guide 40.
A stopper pin 42 for the left horizontal stopper of the rod 41 is in contact with the right side of the rod 41, and is attached to the round hole 41b of the rod 41, and is attached to the oval hole 4 of the guide 40.
This is a pin installed below 0c.
43 is a frame having round holes 43a, 43b, 43c, and 43d. 44 is a round hole 44b and an oval hole 44c for the shaft of the stepped pin provided with the round hole 44a.
Make the board with the holes vertical and insert the oval hole 44c and the round hole 44.
The upper and lower ends of this shaft are passed through the round hole 40f of the guide 40 and the round hole 43a of the frame 43, and the pin 42 attached to the rod 41 is engaged with the oval hole 44c. It is a rotatably mounted lever. 45 is a roller, 46 is a pin, 47 is a set pin, 48 is formed into a U-shape, and has round holes 48a, 48b and the above-mentioned round hole 4.
It has a round hole 48c perpendicular to the axis of 8b,
The roller 45 is rotatably attached to the round hole 48c with a pin 46, and the roller 45 is rotatably attached to the round hole 43a of the frame 43.
This round hole 48b is passed through the shaft of the lever 44 extended from the arm, and the round hole 48c and the round hole 44a, which is perpendicular to the shaft of the lever 44, are fixed by a set pin 47, and the arm rotates in the same manner as the lever 44. It is. 5 connects one end to the round hole 4 of the frame 43.
3b, and the other end is inserted into the round hole 4 of the lever 44.
4b, the lever 44 is constantly biased counterclockwise, and the stopper pin 3 attached to the rod 41 that interlocks with this lever 44 is held in a state in which it is in contact with the right side surface of the square hole 40b of the guide 40. It is a tension spring. 49 is the round hole 43 of the frame 43
This screw is used to secure the vertical distance between the guide 40 and the frame 43 by means of screw holes 40e provided on both sides of the guide 40, and to fix the lever 44 so as not to interfere with the rotational movement of the lever 44. 34 is an insulating support material, 50 is a movable contact, 51 is a fixed plate for fixing the movable contact 50, 52 is a compression spring for contact, and 53 is a movable contact 5 attached to the fixed plate 51.
This is a stepped screw for attaching 0 with the compression spring 52 in between. The mounting plate 51 to which the movable contact 50 is attached is attached to one end of the insulating support member 34 with a screw (not shown), and the other end of this insulating support member 34 is attached to one end of the arm 48 with a screw (not shown). It is installed by Reference numeral 54 in FIG. 9 is a cable whose one end is connected to the fixed plate 51 and whose other end is connected to an insulation resistance measuring terminal (not shown). 9 and 10 show the installed state of the position detection device that also serves as the mega ring device of the drawer type switch of the present invention, and FIG. 10 is a side view of the position detection device that also serves as the mega ring device, and FIG. FIG. 9 is a plan sectional view taken along the line of FIG. 10.

In the figure, 10 is the box of the switchboard, 11 is the switch room of the switchboard, 12 is the cable room of the switchboard, and 13 is the box of the switchboard.
is the partition wall between the switch room 11 and the cable room 12, 38
39 is a drawer type switch, and 39 is a push plate attached to the drawer type switch 38 and for driving a position detection device which also serves as a megger ring device and comes into contact with a roller 45. The position detection device that also serves as the megger ring device is located in the round hole 4 of the frame 43 on the switch chamber 11 side of the bulkhead 13 of the switchboard.
The 3d part is attached with the screw 55, and the switch is tested at the switch test position (the position shown by the dashed line in Figures 9 and 10).
, the stopper pin 3 is in contact with the right side of the guide 40, the roller 45 is in contact with the push plate 39, and the roller 6a of the test position detection switch 6 is in contact with the rod 41.
on the notch 41c. 55 is a screw for attaching this device to the bulkhead 13 of the switchboard, and 56 is a fixed contact attached to the cable room conductor.

Next, the operation will be explained. Drawer type switch 3
8 is in the test position, the push plate 39
In this state, the notch 41c of the rod 41 contacts the roller 6 of the test position detection switch 6.
a, and detects that the switch 38 is in the test position. Also, in this state, the movable contact 5
0, a predetermined contact pressure with the fixed contact 56 is obtained with the contact compression spring 52 compressed. In this state, an insulation resistance meter (not shown) is connected to the insulation resistance measurement terminal (not shown) connected to the cable 54, and the insulation resistance of the load system connected to the fixed contact 56 can be measured. . Next, the drawer type switch 38
is moved from the test position to the operating position (indicated by solid lines in Figures 9 and 10) using a drawer insertion device (not shown).
When the roller 45 is inserted into the push plate 39 as the drawer-type switch 38 moves, the arm 48
The lever 44 rotates counterclockwise around the round hole 40f of the guide 40 and the round hole 43a of the frame 43, and as the lever 44 rotates counterclockwise, the tension spring 5 is biased, and the rod 41 is rotated to the right. Driven in the horizontal direction, the notch 41c of the rod 41 comes off the roller 6a of the test position detection switch 6, and the test position detection switch 6 is turned off. Also arm 4
8 rotates in the counterclockwise direction, the movable contact 50
is separated from the fixed contact 56. Drawer type switch 3
8 reaches the operating position, the notch 41c of the rod 41
reaches the roller 7a of the operation position detection switch 7, and the switch 7 is turned on and the drawer type switch 3 is turned on.
It is detected that 8 has reached the operating position and the mega ring has been released, and the drawer type switch 38 can be operated. Next, when the drawer type switch 38 is pulled out from the operating position to the test position by the drawer insertion device, the lever 44 and the arm 48 are moved by the tension spring 5 into the round hole 40f of the guide 40 and the round hole 4 of the frame 43.
Since the roller 45 receives a clockwise biasing force centered on the roller 3a, the roller 45 rotates clockwise while contacting the push plate 39 as the drawer-type switch 38 is pulled out. Further, as the lever 44 rotates clockwise, the rod 41 is driven horizontally to the left, the notch 41c of the rod 41 comes off the roller 7a of the operating position detection switch 7, and the switch 7 is turned OFF. Further, the movable contact 50 comes into contact with the fixed contact 56 immediately before the drawer type switch 38 reaches the operating position, the compression spring 52 is compressed by the urging force of the tension spring 5, and the movable contact 50 and the fixed contact 56 are When a predetermined contact pressure is obtained and the test position described above is reached, the notch 41c of the rod 41 turns on the test position detection switch 6, and the drawer type switch 38 is at the test position, allowing insulation resistance measurement (megger ring). , it is detected that the drawer type switch 38 can be opened and closed.

In the above embodiment, a roller 45 and a pin 46 are provided at the tip of the arm 48, but a protrusion may simply be provided at the tip of the arm 48. In addition, in the above embodiment, the frame 4 constituting the apparatus is
0 and 43 are configured in separate frames for convenience of explanation, but each function may be configured in one frame, and although the number of micro switches was explained as two, the shape of the rod 41 can be changed. Accordingly, it is possible to install a large number of arms 48, and although the rotation direction of the arm 48 is described as being horizontal to the ground, it is also possible to configure the arm 48 to rotate in a vertical direction as well as in the above embodiment. It has the effect of

As described above, according to the present invention, the insertion and withdrawal operations of the drawer-type switch are converted into the rotation of the arm to drive the mega ring device, and the rotation center is the same as the arm and the rotation is performed in the same manner as the arm. Since the rod is moved horizontally and linearly by a lever with a small radius, thereby operating the detection switch for the position detection device and the detection switch for the mega ring device, the number of components of the mega ring device and the position detection device can be reduced. The entire device can be made compact and inexpensive. In addition, since the driving part is assembled inside the frame and installed on the side of the switchboard or disconnection chamber, assembly and adjustment are very easy, and maintenance and inspection are also very easy. Furthermore, since the contact pressure between the contacts is obtained by the compression force of the compression spring, there is an effect that stable contact pressure can be obtained. In addition, since the position detection device and mega ring device are configured in the same box,
Each assembly and adjustment can be done at the same time, which not only simplifies assembly and adjustment, but also greatly reduces the number of parts. Furthermore, even in the case of a drawer opener with different ratings for insertion and drawer strokes, other parts can be used by simply changing the length of the arm, which has the effect of standardizing parts.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional position detection device, Fig. 2 is a side view of a conventional mega ring device, and Fig. 3 is a perspective view of a conventional position detection device.
The one in the figure is a front view seen from the cable room side of the switchboard, Figure 4 is a plan sectional view showing the installation state of the conventional position detection device and megger ring device in the switchboard, and Figure 5 is a side view of the one in Figure 4. 6 is a plan view of an embodiment of the present invention, FIG. 7 is a front view thereof, and FIG.
The figure is an exploded perspective view, and FIG. 9 is a plan sectional view showing an embodiment of the present invention installed in a switchboard.
FIG. 10 is a side view thereof. In the figure, 5 is a tension spring, 6 is a test position detection switch, 7 is an operating position detection switch, 10 is a switchboard box, 11 is a switch chamber, 34 is an insulating support material,
38 is a drawer type switch, 41 is a rod, 44 is a lever, 48 is an arm, 50 is a movable contact, 52 is a compression spring, and 56 is a fixed contact. Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. In an operation mechanism that is linked to the insertion and withdrawal of a switch in a switchboard that houses a drawer-type switch,
A frame installed in the above-mentioned switchboard, an arm that is rotatably supported at the middle part of the frame, one end of which is in contact with the switch that is pulled out and inserted, and rotated, the other end of this arm is A megger ring device in which an attached movable contact contacts a stator contact electrically connected to a load-side electrical circuit in a switchboard when a switch is pulled out, and opens when the switch is inserted; A rod is supported by the frame in a reciprocating manner and is moved linearly in conjunction with the rotation of the arm, and a rod corresponding to the rod is disposed on the frame and is moved to the pull-out and insertion positions of the switch. An operation mechanism for a switchboard equipped with a position detection device consisting of a test position detection switch and an operating position detection switch that output a detection signal according to the movement position. 2 It has a roller at one end of the arm, an insulating member at the other end, and a conductive contact on the insulating member, so that a predetermined contact pressure is obtained when the arm comes into contact with the fixed contact by rotation of the arm. 2. The operation mechanism for a switchboard according to claim 1, further comprising a megger ring device having a spring material provided on a contactor. 3. A second lever that is fixed to the center of rotation of the arm, rotates, and has an oblong hole at its tip, and a spring at the tip of this lever that urges the arm to return in the direction of pulling out the switch. The member is provided with an engaging recess at a predetermined position, is supported by the frame so as to be reciprocally movable, and a fixed connecting pin is engaged with the oval hole, whereby the arm is rotated. A position detection device consisting of a rod that is converted into linear motion by rotation of the second lever, and a test position detection switch and an operating position detection switch that engage the recessed portion and output a detection signal when the rod moves. An operating mechanism for a switchboard according to claim 1 or 2, comprising: