JPS6089016A - Switching device - 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 [Technical Field of the Invention] The present invention relates to a switchgear having an improved shock absorbing device for absorbing the impact caused by the stoppage of movement of a movable contact.

[Technical background of the invention and seven problems]

In general, switchgear devices that switch on and off power by connecting and separating a fixed contact and a movable contact, such as a disconnector, require a shock absorber to absorb and reduce the large impact force that occurs when the movable contact stops moving. .

Conventional shock absorber 1! : Equipped with a switchgear installed in 1989-4.
This will be explained using the disconnector shown in FIGS. 1 to 5, which is known from No. 263. Insulating spacer 2 inside grounded container 1
The fixed contact 3 is supported and fixed by. A movable contact 4 that approaches and separates from the fixed contact 3 is a high voltage section 5.
It is supported by an insulating spacer 6 via. An operating rod 7 is connected to the end of the movable contact 4 opposite the fixed contact 30, a rod 8 is connected to the other end of the operating rod 7, and a pin 9 is connected to the tip of the rod 8. The link 10 is attached. A buffer device 12 is connected to the other end of the link 10 via a pin 11. This buffer device lt,
12 protrudes toward the outside of the container 1, and is structured around a piston rod 13 and a cylinder 14. The pin 11 has a rod 8 and a piston rod 13 in an almost bloodless direction.
is connected to a guide 15 fixed to the container 1 so as to be guided therein. A piston 16 is attached to the other end of the piston rod 13, and this piston 16 has a return hole 17 at the top and a throttle hole 184 at the bottom in the figure, and slides in the 1-minute direction of an Iφ cylinder fixed to the guide 15. do. Moreover, this cylinder!
4. There is a cover 2 fixed to the guide 15 on the outside of the
A space surrounded by the cover 20 and the guide 15 is filled with a fluid 21.

The link 10 is connected to one end of a V-bar 23 via a pin 22 provided approximately in the center. An operating device 25 provided outside the container 1 is connected to the other end of the lever 230 via a shaft 24. and rod 8, link 10 and lever 23
By Scott Russell.

Now, when the P official command is input to the operating device 25 from an external device, the lever 23 rotates counterclockwise about the shaft 24.

Accordingly, the link IO rotates around the pin 22. The closure, rod 8, operating rod 7 and movable armature 4 move forward and come into contact with the fixed contactor 3, completing the closing of the switchgear. At the same time, the piston rod 13 and the piston 16 first rise as shown in FIGS. 3 and 4, and the fluid 21 above the piston 16 is discharged through the return hole 17.

Next, when the link 10 rotates further and the piston 16 exceeds the upper limit as shown in FIG. 4, the piston rod 13 and the piston 16 descend as shown in FIGS. 4 and 5. At this time, the fluid 21 is pushed up through the throttle hole 18 and a buffering force is generated.

When changing from the closed state to the tripped state, the opposite effect described above occurs.

However, in such a shock absorber 12, as shown in FIG. 1, the dimension C including the shungai [12] is larger than the main body dimension B of the opening/closing device, and the occupied area and volume increase. Furthermore, since the piston 16 operates throughout the entire process of the movement of the rod 8, a buffering effect is exerted on the entire operating force of the operating device 25. However, the buffering effect is necessary only immediately before the end of the operation of the movable contactor 4, and the buffering effect during the entire process results in a loss of power of the operating device 25.

[Purpose of the invention]

The present invention was made in order to eliminate the above-mentioned study points,
It is an object of the present invention to provide a switchgear equipped with a small and efficient shock absorber.

[Key points of the invention]

In order to achieve the above object, in the present invention, a slow arc device having a piston and a cylinder on the same axis as the movement of the movable contact is provided inside the switchgear, and a time delay is established with respect to the movement of the movable contact. Connected so that the piston moves.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to the drawings.

6 and 7 show a disconnector as an example of a switching device. Both figures show the disconnector in a tripped state. Inside the customer device 30, a fixed contact 32 is fixed to the container 30 by an insulating spacer 31 on the left side in the figure. A movable contact 35 is coaxially opposed to the fixed contact 32 and supported by an insulating spacer 34 with a high voltage section 33 in between.

When the disconnector is turned on, the movable contact 35 advances and the fixed contact 3
2, and the electric path connects the fixed contact 32 and the high voltage part 3.
3 and the movable contact 35.

An insulating rod 36 and a rod 37 are sequentially mechanically connected to one side of the movable contact 35 coaxially with the movable contact 35 . The rod 37 has seven rank portions 38 and 39 at the side end of the insulating rod 36 and near the center of the rod 37, respectively. One end of a link 41 is connected to the vicinity of the end of the rod 37 on the flange portion 39 side via a pin 40. A bin 42 is connected to the other end of the link 41, and a roller 43 is connected to the outside of the bin 42.
Further, the outside of this row 243 slides within a guide 44 fixed to the container 30 perpendicularly to the moving direction of the movable contact 35. The link 41 is connected to one end of a lever 46 via a pin 45 provided approximately in the center, and further connected to the other end of this lever 46 via a shaft 47 to an operating device 48 provided outside the container 30.

li! The tong device 49 is provided between the 7-rank part 38 and the flange part 390 of the rod 37, and is connected to the piston 50 and the cylinder 5.
1 is the main constituent element. The piston 50 is connected to the rod 3
7, the piston shaft portion 52 and the rod 3 are penetrated almost parallel to each other.
7 and a substantially vertical bent portion 53. Piston shaft 5
The length of the rod 37 is made shorter than the distance between the flange portions 38 and 39, and one end of the piston shaft portion 52 comes into contact with and leaves the flange portion 38, and the other end of the piston shaft portion 520 comes into contact with and leaves the flange portion 39, thereby allowing the rod 37 to move. In contrast, the piston 50 moves in the same direction as the rod 37 with a time delay. Further, a roller bearing 54 is provided between the parallel portion 52 and the rod 37, and serves to reduce sliding resistance between the piston 50 and the rod 3f and to guide the piston 50 and the rod 37. A throttle hole 55 is provided in the vertical surface portion 53 of the piston 500 parallel to the piston shaft portion 52 in a substantially concentric shape.

Furthermore, a spring 5 is attached on the circumference approximately parallel to the vertical portion 53.
A stopper ball 57 is provided which is movable via 6.

The cylinder 51 is filled with a fluid 58 and fixed to the inner circumferential surface of the container 30, and the piston shaft 52 of the piston 50 passes through the center of the cylinder 51 and moves in an airtight manner. Container 30 of cylinder 51
A recess 59 is provided at the moving i end of the vertical portion 53 of the piston 50 on the side inner surface.

Next, the operation of the configuration of this embodiment will be explained.

Here, the closing operation accompanying the disconnector closing command will be explained, and the explanation of the tripping operation will be omitted. The shaft 47 rotates counterclockwise by the operating force of the operating device 48 in response to the closing command. This causes the lever 46 to rotate counterclockwise about the shaft 47 together with the pin 45. Furthermore, the link 41 rotates clockwise, and the pin 42 is guided within the guide 44 by the roller 43 on the side of the container 30 and moves parallel thereto.
0 moves toward the fixed contact 32 on the axis of the rod 37.

At the same time, the rod 37, the insulating rod 36 and the movable contact 35
moves to the left in the figure and moves toward the fixed contact 32 side. J: When the raising process progresses and the movable contact 35 moves to the center of the stroke, the link 41 and lever 46 are aligned perpendicularly to the rod 37, and the distance from the rod 37 to the pins 42 and 45 becomes maximum. Further, as the shaft 47 rotates, the movable contact 35 continues to move due to the fixed contact 32, but the distance from the rod 37 to the pins 42 and 45 begins to decrease.

At this time, the flange portion 39 comes into contact with the piston shaft portion 52 of the piston 50, and the piston 50 begins to move toward the fixed contact. At this time, the stopper bolt 57 provided above the piston 500 moves together with the piston 50 from the right quadrant 59 in the figure toward the fixed contact 32 while contracting the spring 56. Spring 56 moves stopper ball 57 to cylinder 51
The frictional resistance force generated by pressing the button is made as small as possible compared to the operating force of the operating device 48. Furthermore, when the piston 50 moves toward the fixed contact 32, the fluid 58 flows into the constriction hole 55.
Since the piston 50 moves in a direction opposite to the movement direction of the piston 50 through the piston 50, a throttling effect occurs and the piston 50 receives a damping effect. Finally, as shown in FIG. 8, the stopper ball 57 of the piston 50 is accommodated in the concave portion of the cylinder 51 on the side of the fixed contact 32, and the movable contact 35 is inserted into the fixed contact 32 so that the disconnector The input operation is completed.

Similarly, when the new circuit switch changes from the closed state to the tripped state, the process is reversed to the above, so the explanation will be omitted.

In this embodiment, since the IL value device 49 using the piston 50 and cylinder 51 is provided inside the main body of the container 30, the overall size of the disconnector can be reduced.

Furthermore, since the pistons 50 are arranged to interlock with each other after the movable contact 35 has moved a predetermined distance, the movable contact 35
The shock absorber operates immediately before the closing and tripping operations are completed.
Effective operating force acts. Furthermore, in the completed state of closing and tripping, the stopper ball 57 provided on the piston 50 is located in the recess 59 of the cylinder 51.

Since the piston 50 is in a semi-fixed state, the movable contact 35 can maintain a stable state.

Similarly, in this embodiment, only a shock absorber attached to a disconnector has been described, but the present invention is not limited to a disconnector and can also be used in a switching device such as an interrupter.

〔Effect of the invention〕

As explained above, according to the present invention, a shock absorber having a piston and a cylinder is provided inside the opening/closing device container, and the piston operates immediately before the closing and tripping operations are completed, so that the opening/closing device is small and efficient. can be provided.

[Brief explanation of drawings]

Figure 1 shows the conventional II! 2 is a sectional view of a switchgear having a gate device, FIG. 2 is a sectional view taken from the A-5 section arrow direction in FIG. 1, and FIGS. 3 to 5 show the operation of the acid value device in FIG. 1. FIG. 6 is a sectional view of a switchgear showing an embodiment of the present invention,
Figure 7 is a sectional view taken from the direction of arrow A-A in Figure 6;
The figure is Il! of Figure 6! FIG. 3 is a diagram showing the operation of the collision device. 30 Container 32 Fixed contact 35 - Movable contact 37 Rondo 38. Flange part 49 M device 50, piston 5], cylinder 52, piston shaft part 54 roller bearing 55, throttle hole Agent Patent attorney Noriyuki Chika (and 1 other person) No. 21
m Figure 8 50

Claims (1)

[Claims] A switchgear in which a fixed contact and a movable contact capable of moving toward and away from the identification contact are disposed in a container, the switch being movable in conjunction with the movable contact in the same direction as the direction of engagement and detachment of the movable contact; A piston having a perforated hole T is disposed on the same axis as the movable contact in the container, and a shock absorber is provided for fitting the piston therein and shouldering the cylinder filled with fluid, A switching device characterized in that the piston moves with a time delay after the movable contact moves by a predetermined amount.