KR100406103B1 - Switch gear - Google Patents

Abstract

A switchgear having vacuum valves, an interrupter operating mechanism and a ground switch operating mechanism, the latter two being disposed on a metal common base frame. The interrupter operating mechanism comprises a drive shaft that extends on a line of direction of opening and dosing movements of a contact electrode of the vacuum valve, whereby a drive load is directly transmitted to the contact of the vacuum valve along the line of direction. The drive shaft of the interrupter operating mechanism is disposed on the common base frame at a section between movable rods and is connected to the drive shaft through a connecting member. A connecting member and a spring rod of a ground switch side movable rod of the ground switch operating mechanism are connected through a wipe-link mechanism. <IMAGE>

Description

Switchgear {SWITCH GEAR}

The present invention relates to a switchgear having a vacuum valve, a breaker operating mechanism and a ground switch operating mechanism, and more particularly, to an arrangement configuration of the breaker operating mechanism and the ground switch operating mechanism.

The arrangement of the breaker operating mechanism and the ground switch operating mechanism in the conventional switching device will be described with reference to FIGS. 7 and 8. Fig. 8 is a side view of the configuration shown in Fig. 7. In Fig. 7 and Fig. 8, reference numeral 60 denotes a breaker operating mechanism, and the breaker operating mechanism 60 is a fixed terminal 61a connected to the vacuum valve 61 and movable. One end is fixed to the terminal 61b and the movable terminal 61b above the vacuum valve 61, and the other end is connected to the breaker drive shaft 21 via a wipe link indicated as part A in the drawing ( 62). On the other hand, 70 is a disconnecting / grounding switch operating mechanism, and the disconnecting / grounding switch operating mechanism 70 is a grounding switch drive shaft 22 connected to the disconnecting / grounding switch contact 71 and the disconnecting / grounding switch contact 71. ), The ground terminal 72, and the like.

20 is a tank, and the tank 20 has a circuit breaker contact vacuum valve 61 of the circuit breaker operating mechanism and a circuit breaker drive shaft 21 for opening and closing the circuit. 71 and a ground switch drive shaft 22 for opening and closing the same are housed. In addition, 82 in a figure is a bus bar.

In addition, 23 is a fixed frame, 24 is a breaker link frame, 25 is a ground switch link frame, the breaker operating mechanism 60 through the breaker link frame 24 through the ground switch link frame 25 ground switch operating mechanism ( 70 is configured to be fixed to the fixed frame 23, respectively.

The following operation is described.

When the circuit breaker drive shaft 21 of the circuit breaker operating mechanism 60 rotates, the movable contact of the vacuum valve is operated through the wipe link (part A of FIG. 7) and the insulating operation rod 62 connected thereto to operate the vacuum valve 61. Open and close.

Next, the operation of the disconnecting and grounding switch contact 71 will be described in FIG. 8. The disconnecting / grounding switch contact 71 of the disconnecting / grounding switch operating mechanism 70 is now in the connected state at the position A in the drawing, but when the grounding switch drive shaft 22 is rotated, it moves to the position B and becomes the disconnecting state. When the ground switch drive shaft 22 is rotated again, it moves to the position C, and the disconnecting and grounding switch contacts 71 are connected to the grounding terminal 72 and are brought into a ground state.

As described above, the arrangement of the circuit breaker operating mechanism and the ground operating mechanism is longer than the drive shaft 21 of the circuit breaker operating mechanism or the drive shaft 22 of the ground switch operating mechanism to transmit the force through the fixed frame. It is constructed in bold to secure rigidity.

As shown in Fig. 9, since the driving direction of the circuit breaker drive shaft 21 is changed by a long lever, a link, or the like, each of these members is a rigid large component having a bending rigidity and the like.

In addition, it is necessary to leave enough space in the area where these links operate so as not to interfere with other components.

Moreover, since the friction and load loss at the time of changing a driving direction become large, it was necessary to make the link parts, the circuit breaker link frame 24, the ground switch link frame 25, etc. all have the structure with large rigidity.

Next, the wipe link structure diagram of the portion A shown in FIG. 7 in FIGS. 10 to 12 will be described. 10 is a side view of the open state, FIG. 11 is a front view of the open state, and FIG. 12 is a front view of the closed state. In the figure, reference numeral 26 denotes a voltage spring, 27 denotes a spring rod, and is protruded and attached to the wipe link A side of the insulating rod 62. 28 is a U-shaped bracket of the wipe link A, and is connected to the lever of the breaker drive shaft 21 via a pin 29.

The U-shaped bracket 28 has a hole through which the tip of the spring rod 27 penetrates, and the spring rod 27 is connected to be able to slide. This structure generates a contact load of the vacuum valve 61, and after the breaker contact of the vacuum valve 61 is touched in order to maintain a contact load of a predetermined value or more even if the operating stroke of the drive link mechanism occurs, the breaker The contact spring 26 is compressed to some extent.

In the closed state, since the amount of this wipe causes the spring rod 27 to come out from the U-shaped bracket 28 by the dimension B shown in FIG. 12, a space is required between the pin 29 of the connection and this space is secured. have.

In addition, as shown in the drawing, the conventional U-shaped bracket 28 is made of sheet metal, and the spring rod 27 guides the hole of the sheet thickness of the sheet metal of the U-shaped bracket 28 (dimension C in Fig. 12). Was only the thickness of.

As described above, in the arrangement of the conventional circuit breaker and the ground switch operating mechanism, the tank, the circuit breaker operating mechanism, and the ground switch operating mechanism are individually fixed to the fixed frame. However, the parts were large, so each of them had to be larger.

In addition, since the breaker operating mechanism and the ground switch operating mechanism were each attached to independent link frames, it was not possible to arrange the other mechanism in the empty space of the installed one mechanism.

In addition, since the contact drive shaft mechanisms are arranged so as to change their driving directions, there is a need for a structure in which friction and load loss increase, and links, shafts, and frames also have great rigidity.

In addition, since the driving required area is also large, a large installation space is required, and the entire apparatus is enlarged.

In addition, especially in the configuration of the conventional wipe link connection, a space that can be avoided is necessary in the construction. As described above, since the length of the guide is as short as the sheet thickness of the sheet metal, the shaking of the spring rod 27 becomes large, and the space and Rigidity needed to be large together.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a configuration in which the rigidity of components or components may be small, and the arrangement space is small, the number of components being small, simple, and compact. .

1 is a front view of the switching device of the first embodiment;

2 is a side view of FIG. 1;

Fig. 3 is a side view showing the connecting member of the drive shaft 2 of the breaker operating mechanism.

4 is a side view showing an open state;

5 is a front view showing an open state;

6 is a front view showing a closed state;

7 is a view showing the arrangement of a circuit breaker operating mechanism and a grounding switch operating mechanism in a conventional switching device;

8 is a side view of FIG. 7;

9 is a perspective view of a conventional link.

10 is a side view showing an open state;

11 is a front view showing an open state;

12 is a front view showing a closed electrode state;

<Description of Symbols for Main Parts of Drawings>

2: drive shaft (breaker operating mechanism)

3: drive shaft (grounding switch operating mechanism)

4: vacuum valve 8: rotating member

8a: through hole

42: movable rod of breaker side (breaker operating mechanism)

52: grounding switch side movable rod (grounding switch operating mechanism)

60: breaker operating mechanism

The invention of claim 1 is characterized in that the circuit breaker operating mechanism and the ground switch operating mechanism are arranged in a common base frame in an opening and closing device having a vacuum valve, a circuit breaker operating mechanism, and a ground switch operating mechanism. In the opening and closing apparatus described above, the drive shaft of the circuit breaker operating mechanism is installed on an extension line in the opening and closing direction of the contact point of the vacuum valve, and the driving load is configured to transfer the extension line linearly to the contact point of the vacuum valve. In the invention of claim 1, the drive shaft of the breaker operating mechanism is placed on a common base frame corresponding to the breaker side movable rod of the breaker operating mechanism and the ground switch side movable rod of the ground switch operating mechanism. And the drive shaft and the circuit breaker movable rod are connected through a connecting member. (Embodiment of invention)

Embodiment 1.

1 and 2 showing Embodiment 1 of the present invention.

1 is a front view of the opening and closing device, and FIG. 2 is a side view thereof.

First, the mold body (hereinafter referred to as mold body) 80 of the vacuum valve in which the contacts of the circuit breaker and the ground switch are accommodated will be described.

As shown in Fig. 1, this example is a three-phase switchgear, and the mold body 80 is a three-phase portion, namely, A, B, C phase, and commercially available vacuum valves 4 collectively in a box shape with an insulator resin. It was formed by moulding.

In Fig. 2, the inside of the vacuum valve 4 held at a high vacuum has a circuit breaker contact 41 which serves as a disconnector and a lane, and a ground switch contact 51 for grounding, and a movable side contact 41a and a ground. The fixed side contact 51b of the switch is connected by a flexible conductor, that is, a shunt 81.

The fixed side contact 41b is connected to the bus bar 82 outside of the mold body 80, and the ground switch fixed side contact 51b is connected to the power transmission cable 83 outside of the mold body 80. .

The movable side contact 41a is connected to the breaker side movable rod 42 outside of the mold 80 through the insulating rod 84 bellows 85, and the movable side contact 51a of the ground switch. Is connected to the external ground switch side movable rod 52 of the mold body 80 via the bellows 86.

The ground switch side movable rod 52 is grounded to the ground portion E. FIG.

In the normal energized state, the breaker contact 41 is closed, the ground switch contact 51 is open, and the current is transmitted through the breaker contact 41, the shunt 81, and the ground switch contact 51 at the bus line 82. The cable 83 is energized. Moreover, since the ground switch side movable rod 52 is connected to the ground part E outside the mold body 80 by closing the ground switch contact 51 in the breaker contact 41 open state, a power transmission cable ( 83) can be grounded.

Next, the arrangement of the breaker operating mechanism and the ground switch operating mechanism will be described.

In FIG. 1 and FIG. 2, 40 is an operation part of a circuit breaker operation mechanism, and 50 is an operation part of a ground switch operation mechanism.

1 is a common base frame of the circuit breaker operating mechanism 40 and the ground switch operating mechanism 50 having a cross-section having a U-shape, and as shown in FIG. 2, the same frame surface of this common base frame 1 is shown in FIG. 2. The drive shaft 2 of the breaker operating mechanism 40 and the drive shaft 3 of the ground switch operating mechanism 40 are held in the paper thickness direction.

The common base frame 1 is a sheet metal bending structure formed by bending a single metal plate in a U-shaped cross section (see Fig. 2), and is fixed to an upper portion of the mold 80. A fixed portion is an A phase or a B phase. The phase B vacuum valve 4 and the phase B vacuum valve 4 and the phase B vacuum valve 4 as shown in FIG. The bolt is fixed between the vacuum valve 4 of the C phase using a gap.

For this reason, as can be seen from the front view of FIG. 1, the left and right dimensions W of the common base frame 1 can be shortened as compared with the case where the A, B, C phase vacuum valves 4 are fixed on both sides. It is.

For this reason, since the space | interval of a fixed part can be narrowed, sufficient rigidity can also be acquired even in one sheet metal bending structure.

Moreover, since the width of the common base frame 1 shown in FIG. 1 can be narrowed by the amount which eliminated the fixing part of both sides, the drive shaft 2 of the circuit breaker operation mechanism, and the drive shaft 3 of the ground switch operation mechanism are also The same can be shortened.

Therefore, the rigidity of these drive shafts 2 and 3 can be improved by the length of the points shortened, and the device can be miniaturized.

A contact spring 5 of the circuit breaker operating mechanism is disposed on the line in the driving direction (up and down direction in Fig. 2) of the circuit breaker side movable rod 42 which opens and closes the circuit breaker contact 41, and the drive shaft 2 of the circuit breaker is arranged. The operating part of the circuit breaker operation mechanism 40 is arrange | positioned directly in the opening-and-closing direction of the circuit breaker contact 41 through (circle).

This arrangement makes it possible to transmit the load almost in a straight line without changing the driving direction.

This reduces friction and load loss and minimizes bending stiffness.

This arrangement eliminates the need to connect with a relatively long lever 100, as shown in the conventional example of FIG. 9, and a relatively short connection member, i.e., a breaker, having the required lever ratio as shown in FIG. As the connecting member of the drive shaft 2 of the operating mechanism, for example, the lever 200 can connect the contact spring 5 and the operation unit of the breaker operating mechanism 40.

Further, the drive shaft 2 of the circuit breaker operating mechanism can be disposed between the plurality of movable rods 42 adjacent to the same direction and the ground switch side movable rod 52 in the upper portion of the mold 80.

In this way, by using the relatively short connection member as described above, by arranging the drive shaft 2 between the movable rod 42 and the movable rod 52, the required space required for driving can be reduced, and the apparatus can be miniaturized. Can be.

Next, in Fig. 4, the connection between the drive shaft 3 of the ground switch operating mechanism and the spring rod 52a provided on the upper end side of the ground switch side movable rod 52 for opening and closing the ground switch 51, that is, in this example, The wipe link structure of part B shown in FIG. 2 will be described. In Fig. 4, the connection between the drive shaft 3 of the ground switch operating mechanism and the end of the spring rod 52a is connected via a connecting member 3a fixed to the drive shaft 3, and the heat connecting member 3a is connected. And a rotation member 8 freely rotatable to the connecting member 3a in parallel with the drive shaft 3 and an end of the spring rod 52a, and a through hole drilled in a direction orthogonal to the axis of the rotation member 8. The wipe link connection of the structure which inserted the end of the said spring rod 52a in the ball 8a freely is made.

A contact spring 6 is interposed between the rotating member 8 and the protrusion 52b formed below the spring rod 52a.

Next, this wipe link connection will be described with reference to Figs. 4 is a side view showing an open state of the ground switch contact 51, FIG. 5 is a front view thereof, and FIG. 6 is a front view showing a closed electrode state.

4 to 6, 6 is a contact spring of the ground switch operating mechanism, 52a is a spring rod, and is formed in a form in which an upper end portion of the ground switch side movable rod 52 of the ground switch contact 51 is extended.

8 is a wipe link pin as a rotating member, and is freely attached to the connecting member of the drive shaft 3 of the ground switch operating mechanism, that is, the cantilever lever 3a as the connecting member fixed to the drive shaft 3.

The through-hole 8a is provided in the center of the wipe link pin 8 in the axially perpendicular direction, and the spring rod 52a and the pin 8 having one end inserted into the through-hole 8a are connected to the ground switch contact ( The contact spring (6) of 51) is connected so that it can slide by inserting it in compression contact state.

When the drive shaft 3 of the ground switch operating mechanism is rotated clockwise by the closed pole operation, and the cantilever lever 3a is driven downward, the wipe link pin 8 presses the contact spring 6, and the spring rod 52a. ), The movable rod 52 is driven downward to close the ground switch contact 51.

Thereafter, even after the ground switch contact 51 is closed, the contact spring 6 is compressed to some extent. Therefore, even if the closing stroke on the mechanism occurs, the contact load of a certain load or more is maintained by setting the compression amount of the contact spring to a certain degree or more.

Since the wipe link for functioning in this way is pin-shaped and directly attached to the cantilever lever 3a as a connecting member of the drive shaft 3 of the ground switch operating mechanism, the spring rod 52a is connected to the wipe link pin 8 when the ground switch is closed. Even if it is pushed upward in the ()) there is no connection pin, etc., and the spring rod 52a is pushed to the original drive area, so there is no need to secure a space, and the device can be miniaturized.

In addition, since the hole 8a of the wipe link pin 8 also serves as a guide for the spring rod 52a, it is guided by a guide longer than the guide for the plate thickness as in the prior art, so that rattling can be reduced and pressure is reduced. Stabilization during the process can be achieved.

1 and 2, reference numeral 9 in the drawing is a breaker open spring.

The breaker opening spring 9 is arranged in the gap between the contact springs 6, like the contact springs 6 for phase A and B and between the contact springs 6 for phase B and C.

Therefore, it is not necessary to secure a dedicated installation space of the breaker opening spring 9 separately, and the device can be miniaturized as a whole.

In addition, the ground switch operating mechanism 50 having a low overall height is disposed on the front side of the breaker operating mechanism 40, that is, on the operation side (front side of the apparatus). Since the circuit breaker operating mechanism 40 and the ground switch operating mechanism 50 are each configured as described above, the circuit breaker operating mechanism 40 and the ground switch can be disposed to some extent close to each other using the space between members effectively. Even if the operation mechanism 50 is arranged back and forth, these operations can be performed from the operation surface portion, that is, the front of the apparatus, without dragging the entire display of the mechanism and the operation system.

In this arrangement, the structure can be obtained with a simple structure and a compact switchgear.

1 and 2, reference numeral 10 in the drawing denotes an operation handle on the front side of the operation unit of the breaker operation mechanism 40 and the ground switch operation mechanism 50, and 11 denotes various display units arranged in front of the operation unit.

In addition, in the first embodiment, the case of the wipe link connection structure of the ground switch operating mechanism has been described. However, this wipe link connection structure is not limited to the opening and closing device shown in the first embodiment. It can also be applied, and the same effects as in the above embodiment can be obtained.

According to each invention of Claims 1 to 3, it is possible to provide a configuration that does not require any unnecessary space or high rigidity, and has a small number of parts, a simple configuration, a compact and lightweight opening and closing device.

According to the invention of claim 2, since the load can be transmitted in approximately one straight line, the friction and load loss are reduced, and the bending stiffness of the part can be minimized.

In addition, the space required for driving can be reduced.

As a result, the drive shaft of the breaker operating mechanism can be arranged between the breaker side movable rod and the ground switch side movable rod, and the whole apparatus can be further miniaturized.

According to the invention of claim 3, since the drive shaft of the breaker operating mechanism is disposed between the breaker side movable rod and the ground switch side movable rod, the miniaturization of the apparatus as a whole can be achieved.

Claims (3)

A switchgear including a vacuum valve, a circuit breaker operating mechanism and a ground switch operating mechanism, wherein the circuit breaker operating mechanism and the ground switch operating mechanism are arranged on a common base frame. 2. The opening and closing device according to claim 1, wherein the drive shaft of the circuit breaker operating mechanism is provided on an extension line in the opening and closing direction of the contact point of the vacuum valve, and the driving load is transmitted straight on the extension line to the contact point of the vacuum valve. . The drive shaft of the breaker operating mechanism according to claim 1, wherein the drive shaft of the breaker operating mechanism is arranged in a common base frame between the breaker side movable rod of the breaker operating mechanism and the ground switch side movable rod of the ground switch operating mechanism. Opening and closing device characterized in that for connecting the breaker side movable rod through a connecting member.