JP2563539Y2 - Switchgear detector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch detector for detecting whether a switch is open or closed.

[0002]

2. Description of the Related Art A high-voltage switchgear opens and closes an electrode by driving the movable electrode with a driving means so that the movable electrode is brought into contact with or separated from a fixed electrode.

The following detector is used to detect whether the high-voltage switch is open or closed. That is, a detector that connects a limit switch to a member driven together with the movable electrode via a link or the like and detects the open / closed state of the switch by mechanically transmitting the movement of the movable electrode to the limit switch is used. .

[0004]

However, since the limit switch is a contact point, if the frequency of the opening / closing operation is high, the amount of wear of the parts at the contact point is large and a contact failure occurs. Also,
Since the movement of the switch is mechanically transmitted to the limit switch, the movement of the switch is directly transmitted to the limit switch,
The limit switch is damaged by an impact force, malfunctions due to vibration, or causes chattering. Further, it is difficult to calculate an opening / closing speed or the like from a contact signal due to the fact that high-precision positioning cannot be performed and chattering occurs.

Accordingly, an object of the present invention is to provide a switch detector that solves the above problem.

In order to achieve the above object, the structure of the present invention comprises a movable rod for opening and closing the opening and closing unit, and a rotary drive
The operating shaft to be operated is connected to the lever
The auxiliary lock that is rotatably attached to the end of the lever.
And an insulating lock interposed between the movable rod and the auxiliary rod.
The movable rod and the insulating rod
And the auxiliary rod are connected to both ends of the insulating rod with large diameter
To form a threaded part in the large diameter part
Screw the male threads formed at the ends of the movable rod and auxiliary rod
Opening / closing state of the switching unit in a switch configured in combination
A pair of light-emitting portions sandwiching the large-diameter portion of the insulating rod from a direction perpendicular to the insulating rod and a light-receiving portion for receiving light emitted from the light-emitting portion. Open detecting means for transmitting light without being blocked by the large-diameter portion only when the opening / closing portion is open, and closed for blocking light only by the large-diameter portion only when the opening / closing portion is closed. And a detecting means.

[0007]

[Function] Large diameter part of insulating rod that works with the movable rod of the switch
However, since the light emitted from the light emitting unit is blocked or passed, the open state and the closed state are detected based on whether the light receiving units of the open detection unit and the close detection unit have received light.

[0008]

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. 1 and 2 show the configuration of an embodiment of a switch detector according to the present invention. The present invention utilizes a photoelectric switch. In the drawing, reference numeral 1 denotes an opening / closing section containing a fixed electrode and a movable electrode, and the electrode in the opening / closing section 1 is closed or opened by moving a movable rod 2 to which the movable electrode is fixed up and down. A lever 5 fixed to the operation shaft 4 is connected to the movable rod 2 via an auxiliary rod 9 and an insulating rod 3. The operation shaft 4 is rotatably provided, and is driven by the spring force of the spring, the rotation force of the motor, and the attraction force of the electromagnet. Figure
As shown in FIG. 1 (a), the lever 5 is operated from the nearly horizontal open state.
Rotates the Sakujiku 4, switching unit 1 by moving the lever 5 is upward as shown in FIG. 1 (b) is in the closed state, rotating in the opposite direction
When it is moved, it is opened again .

In this embodiment, an insulating rod 3 and an auxiliary rod
9 and the connection with the movable rod 2 are shown at both ends of the insulating rod 3.
A female thread is formed, and an auxiliary rod is
9. Screw the male thread (not shown) formed at the end of the movable rod 2
I agree. Thus, both ends of the insulating rod 3 are female threaded
Forming the large diameter portions 3a, 3
b. On both sides of the insulating rod 3 so as to sandwich the large diameter portion 3a of the large diameter portions 3a and 3b, a closing detection means including a light emitting portion 7a and a light receiving portion 7b, and a light emitting portion 8
a, an open detection means comprising a light receiving section 8b. As shown in FIG. 1B, the light emitting section 7a and the light receiving section 7b, which are the close detecting means, are arranged at positions where light is blocked by the large diameter section 3a only when closed. On the other hand, the light emitting unit 8 serving as the opening detection means
1A, the light receiving portion 8b is arranged at a position where light is transmitted only when it is open as shown in FIG.

Next, FIG. 2 shows a circuit diagram used for the detector of such a switch. In the figure, 9 is a switch body, 10 is a control circuit, 11a is a closing coil for closing the switching unit 1,
11b is a shut-off coil, 12a is a closed position detection amplifier, 12
b is an open position detection amplifier, 13a is a closing switch for giving a switch-on command, 13b is a cutoff switch for giving a cutoff command, 14 is a control unit, and 15 is an operation unit.

The operation of the detector of such a switch will be described. In order to close the switch, the operator operates the closing switch 13 shown in FIG.
When a is turned on, the closed / open position detection amplifiers 12a, 12a
The control unit 14 recognizes the current state of the open / close unit 1 based on the information sent from b, and confirms that the open / close unit 1 is not in the closed state.

The state of the opening / closing section 1 is confirmed as follows. As shown in FIG. 1A, when the large-diameter portion 3a descends and the open detecting means is in the light-transmitting state, the open position detecting amplifier 12b
Sends a signal to the control unit 14. On the other hand, as shown in FIG. 1B, when the large-diameter portion 3a rises and the close detecting means is in the light blocking state, a signal is sent from the closed position detecting amplifier 12a to the control unit 14.

If the opening / closing section 1 is open, the control section 14 outputs a closing command to the operating section 15 to turn on a not-shown closing coil drive element. As a result, the closing coil 11a is excited, and the open / close unit 1 is closed. When the opening / closing section 1 is closed, the closed state is detected by the close detection means as described above, and the fact that the closed position detection amplifier 12a is in the closed state is transmitted to the control section 14. As a result, the control unit 14 outputs a command to end the input output to the operation unit 15, and the operation unit 1
5 turns off the element for driving the closing coil and completes the closing operation.

To open the opening / closing section 1, it is sufficient to press the cutoff switch 13b, and thereafter the cutoff operation is performed in the same manner as described above.

[0016]

[0017]

[0018]

As can be seen from the above description, according to the switch detector according to the present invention, the insulation connected to the movable shaft is provided.
Since the open / closed state of the switch is detected based on whether or not the large-diameter portion of the rod blocks light , the detection means does not receive physical force from the switch unlike the conventional method, so that the detection means is not damaged by vibration or impact. There is no chattering. Further, since the open / close state is detected by the non-contact, the contact is not worn as in the related art even if the switch is frequently opened / closed, and the life of the detecting means is long. Furthermore, since it is not necessary to connect to the movable bar by a link like a limit switch, it is possible to detect the position of a target part to be sensed or a part close thereto.

[Brief description of the drawings]

FIG. 1A is a configuration diagram showing an open state, and FIG. 1B is a configuration diagram showing a closed state, according to an embodiment of a switch detector.

FIG. 2 is a circuit diagram showing an embodiment of a switch detector.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Opening / closing part, 2 ... Movable rod, 3 ... Insulating rod, 3a , 3b
... Large diameter part, 4 ... Operation shaft, 5 ... Lever, 6 ... Pin, 7a,
8a: Light-emitting unit, 7b, 8b: Light-receiving unit, 9: Auxiliary rod .

Claims (1)

(57) [Scope of request for utility model registration] A movable rod for opening and closing an opening and closing portion;
A lever that has the operation shaft that is rotationally driven fixed to the operation shaft
And pivotally attached to the tip of the lever via a pin.
Between the movable rod and the auxiliary rod
The movable rod, the insulating rod, and the auxiliary rod are connected to each other through an interlocking insulating rod.
Form large diameter portions at both ends of the insulating rod and
A movable rod and an auxiliary rod
The switch is formed by screwing the external thread formed at the end.
A switch for detecting the open / closed state of the switch.
In the detector, the large diameter portion of the insulation rod constitutes the insulating rod and a pair of detection means and the light receiving portion for receiving the emitted light from the light emitting portion a pair of light-emitting portions that sandwich the perpendicular direction, closing Open detection means that is transmitted without being blocked by the large diameter part only when the part is open, and close detection means that is blocked by the large diameter part only when the opening / closing part is closed. Characteristic switch detector.