CN1181603C

CN1181603C - Switch

Info

Publication number: CN1181603C
Application number: CNB991245865A
Authority: CN
Inventors: 大城尊士
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1999-05-12
Filing date: 1999-12-24
Publication date: 2004-12-22
Anticipated expiration: 2019-12-24
Also published as: BR0000168A; CN1274184A; JP2000322987A

Abstract

The present invention provided a large-capacity grounded switch capable of securing a required insulation distance although it is compact. A fixed conductor 24 is branched obliquely downward from a terminal 23 of a disconnection part 22, and plural finger contacts 25 to which contact pressure is applied by a contact pressure spring 26 are arranged in the interphase direction of the fixed conductor 24. By the longitudinal movement of an operation rod 36, the longitudinal movement is transmitted to an rotation shaft 31 through an actuating lever 37, an intermediate link 38 and a rotation lever 32, and a movable contact 33 mounted to the rotation shaft 31 is rotated, so that a connected state is changed over to an opened state and vice versa.

Description

Switch

Technical field

The present invention relates to be used for the load side circuit in the closed distributing box is carried out the structure of switch of the earthed switch etc. of ground connection.

Background technology

For the high pressure closed distributing box, for the purpose of the safety during for maintaining, the earthed switch that load side circuit in the closed distributing box carries out ground connection is installed usually.For example, Fig. 7 opens the sectional side view of existing closed distributing box one example of expression that discloses in the clear 59-183110 communique for Japan Patent is real.

Among Fig. 7, the closed distributing box that surrounds with distribution box outer container 1 is divided into breaker chamber 2, bus-bar room 3 and load cable chamber 4.In breaker chamber 2, be provided with extraction circuit breaker 5.In load cable chamber 4, be equipped with and become to the bushing current-transformer 6 of the sleeve pipe one of the connector of load cable 7.Also vertical outstanding fixed contact 81 is installed on the major loop terminal of bushing current-transformer 6 towards the below, and simultaneously, load cable 7 is connected with this major loop terminal via conductor rods 9.The below of close bushing current-transformer 6 also is used for the earthed switch 8 of load side circuit ground is installed in distribution box outer container 1.

Fig. 8 a is the sectional side view that structure one example of this earthed switch 8 is shown.Fig. 8 b is the partial front figure of Fig. 8 a.Shown in Fig. 8 a, in earthed switch 8, prop up in adorning operation strip 85 on the installing rack 82 and on the gyroaxis 84 by earth terminal 83 ground connection at axle.This operation strip 85 and fixed contact 81 are relative and carry out switching manipulation.Be connected with elbow formula spring 86 in the gyroaxis 84, operation strip 85 can be dropped in the fixed contact 81 rapidly.Shown in Fig. 8 b, above-mentioned operation strip 85 is to engage with fixed contact 81 indirectly via liner 89 with bolt 88.

The below action of explanation earthed switch 8.Make gyroaxis 84 revolutions by other bindiny mechanisms, and when making 86 compressions of elbow formula spring, turn round with operation strip 85, in case surpass adorning the pin of the lever on gyroaxis 84, the fulcrum and the gyroaxis 84 of elbow formula spring 86 is the dead point of a straight line, promptly the resilience force owing to elbow formula spring 86 carries out switch motion.

In fixed contact 81, be provided with the incision groove, change the sense of current that flows in the fixed contact 81 electromagnetic repulsion force is weakened by operation strip 85 positions.In addition, a plurality of operation strip 85 are configured to each relatively together fixed contact 81 are sandwiched mutually, and stage clip 87 is set to apply suitable contact pressure when inserting corresponding fixed contact 81.

In above-mentioned existing switch, because the structure of operation strip for fixed contact is sandwiched, for increasing short time electrical current or input capacity, increase the width of operation strip or increase countermeasure such as its quantity and all be necessary for the consideration of electromagnetic repulsion force, and the problem that exists insulation distance deficiency, movable part weight to increase.

Goal of the invention

In view of the above problems, the object of the present invention is to provide a kind of switch that can under the situation that keep the insulation distance state of guaranteeing necessity, increase the short time electrical current or the capacity of input.

The characteristics of the switch of the present invention's the 1st technical scheme are, comprise: the conductor of fixation side, the contact of a plurality of fixation side that link to each other with this conductor, the contact of the movable side that is connected with the contact of this fixation side gives the contact pressure between this fixation side conductor and this fixation side contact and the spring of the contact pressure between this fixation side contact and this movable side contact.

In the switch of the present invention's the 1st technical scheme, be that contact with movable side is connected and links to each other with the conductor of fixation side and given by stage clip on the contact of a plurality of fixation side of contact pressure.Therefore, though since the occasion that increases at short time electrical current or input capacity also can increase the contact of fixation side and increase the width of the contact of movable side, so can guarantee the insulation distance of necessity.

The characteristics of the switch of the present invention's the 2nd technical scheme are, comprise: with the load side circuit ground in the closed distributing box time from the conductor of the terminal of the parts casing pipe that opens circuit that is connected with this load side circuit fixation side of bifurcated below tiltedly, the contact of a plurality of fixation side that link to each other with this conductor, the contact of the movable side that is connected with the contact of this fixation side gives the contact pressure between this fixation side conductor and this fixation side contact and the spring of the contact pressure between this fixation side contact and this movable side contact.

In the switch of the present invention's the 2nd technical scheme, the conductor that system makes fixation side from the terminal of the parts casing pipe that opens circuit to oblique below bifurcated, make the contact of a plurality of fixation side that gives contact pressure by stage clip along the vacant direction configuration of the conductor of its fixation side, and the contact of movable side is connected with the contact of these a plurality of fixation side.Therefore, can in space, obtain insulation distance effectively near the parts casing pipe terminal that opens circuit, because even the occasion that increases at short time electrical current or input capacity also can increase the contact of fixation side and increase the width of the contact of movable side along vacant direction, so can guarantee the insulation distance of necessity.

The open relation of the present invention's the 3rd technical scheme is in the 1st or the 2nd technical scheme, and its characteristics are, the contact of described movable side be shaped as curve-like.

In the switch of the present invention's the 3rd technical scheme, electric current is the shape of falling S for example etc. in the contact of the movable side of connection status curve-like flows.Therefore, electromagnetic repulsion force can be repealed by implication and prevents that the contact of movable side from coming off to opening direction under connection status.

The open relation of the present invention's the 4th technical scheme is in any technical scheme of the 1st to the 3rd, and its characteristics are, also comprise: the gyroaxis that movable side contact is installed; Adorning the 1st lever on this gyroaxis; With rotating the 2nd lever of external motivating force; Be configured in the connector between above-mentioned the 1st lever and the 2nd lever, this connector arrives above-mentioned the 1st lever in order to the turning power back transfer with above-mentioned the 2nd lever; And being located at pin on above-mentioned the 1st lever, this pin suppresses owing to the external force from above-mentioned movable side contact and gyroaxis makes above-mentioned two contacts of above-mentioned gyroaxis to the revolution of opening direction above-mentioned movable side contact contacts state with said fixing side contact under.

In the switch of the present invention's the 4th technical scheme, system with connector be configured in adorning make on the rotating gyroaxis of movable side contact the 1st lever and and rotating the 2nd lever of the 1st lever rightabout between, and the pin that connects part be set in gyroaxis can not be to opening the rotating position of direction under movable side contact connection status from the external force of movable side contact and gyroaxis.In case the revolution of the 2nd lever is promptly transmitted turning power via connector and the 1st lever turns round in opposite direction, the movable side contact that is installed on the gyroaxis promptly turns round.In case the 2nd lever turns round in the counterclockwise direction, movable side contact promptly is opened, and in case the 2nd lever turns round along clockwise direction, movable side contact promptly is connected with a plurality of fixation side contacts.Under this movable side contact connection status, the pin of connector is positioned at the position above the straight line at the center of the fulcrum pin of pin that connects the 1st lever and the 2nd lever.Therefore, can prevent from reliably to come off to the direction of opening of movable side contact because of the external force of electromagnetic repulsion force etc.

Description of drawings

Fig. 1 is the integrally-built side view of earthed switch (connection status) that closed distributing box of the present invention is shown.

Fig. 2 is the sectional side view of earthed switch (connection status) partial structurtes that closed distributing box of the present invention is shown.

Fig. 3 is the integrally-built sectional side view of earthed switch (open mode) that closed distributing box of the present invention is shown.

Fig. 4 is the sectional side view of earthed switch (open mode) partial structurtes that closed distributing box of the present invention is shown.

Fig. 5 is the vertical view that the earthed switch structure of closed distributing box of the present invention is shown.

Fig. 6 a is the partial enlarged drawing of earthed switch (connection status) that closed distributing box of the present invention is shown.

Fig. 6 b is the enlarged drawing of biopsy cavity marker devices of the portion of bindiny mechanism of Fig. 6 a.

Fig. 7 is the sectional side view of existing closed distributing box one example of expression.

Fig. 8 a is the sectional side view that existing earthed switch structure one example is shown.

Fig. 8 b is the partial front figure of the existing earthed switch of Fig. 8 a.

Embodiment

Below specify example of the present invention with reference to the accompanying drawings.

Fig. 1, Fig. 3 are the integrally-built side view of earthed switch that closed distributing box of the present invention is shown, Fig. 2, Fig. 4 are the sectional side view that the earthed switch partial structurtes of closed distributing box of the present invention are shown, Fig. 1, Fig. 2 represent the connection status that the fixation side contact is connected with movable side contact, and Fig. 3, Fig. 4 represent this two unconnected open modes of contact.In addition, Fig. 5 is the vertical view that the earthed switch of closed distributing box of the present invention is shown.

Among the figure, extraction circuit breaker 5 can be placed in the breaker chamber 2 movably along fore-and-aft direction (left and right directions of Fig. 1, Fig. 3).Certain insulation distance of being separated by up and down in the rear wall 20 of breaker chamber 2 is provided with and connects with a pair of the

open circuit portion

21,22 of opening towards the place ahead.On the other hand, be equipped with contact 11,12 in the corresponding position in the back of extraction circuit breaker 5 respectively with the

portion

21,22 that opens circuit.

By in breaker chamber 2, extraction circuit breaker 5 being pushed into link position, and by contact 11,12 respectively with the relative portion that opens

circuit

21,22 engagement connections, and extraction circuit breaker 5 led to off position, break away from from the portion of

opening circuit

21,22 by the contact 11,12 of drawing and open circuit along with this.

On the terminal 23 of the portion that opens circuit 22 of Fig. 1, Fig. 3 downside with to its tiltedly below the state of branch fixed conductor 24 as the fixation side conductor is installed, the mutually vacant direction in these fixed conductor 24 upper edges disposes a plurality of finger contacts 25 as the fixation side contact with stage clip 26.

Separate necessary insulation distance at the rear wall 20 of breaker chamber 2 gyroaxis 31 is supported, make the pivoted lever 32 of these gyroaxis 31 rotating the 1st levers wait an end of adorning in gyroaxis 31 by welding as being used to.

In addition, on gyroaxis 31, be installed into the finger contact 25 of fixation side as the movable contact 33 of movable side contact and be connected.And, on movable contact 33, be equipped with can be along with the revolution of movable contact 33 end of mobile deflection conductor 34.Adorning in the movable contact on the gyroaxis 31 33 and adorning and be set in the shape of the deflection conductor 34 on the movable contact 33 that current path is roughly the shape of falling S under connection status.

In the bottom of breaker chamber 2, its rear wall 20 is connected and setting operation rod 36, on hook stick 36, be provided with seesawing and rotating action lever 37 corresponding to hook stick 36 as the 2nd lever.Dispose intermediate connector 38 between action lever 37 and the pivoted lever 32, in case action lever 37 rotates, be about to its rotation and be delivered to pivoted lever 32 via intermediate connector 38, pivoted lever 32 is to rotating with action lever 37 rightabouts.

The other end of deflection conductor 34 is being adorned on the short-circuit conductor 35 in the rear wall 20 that is arranged on breaker chamber 2.In addition, the other end of gyroaxis 31 is being adorned lever 39, and lever 39 is provided with elbow formula spring 40.

The action of the earthed switch of structure as mentioned above below is described.

By with hook stick 36 direction (among Fig. 1, Fig. 3 right-hand) action rearwards, action lever 37 and intermediate connector 38 are being adorned in the pivoted lever 32 of gyroaxis 31 and are being rotated to clockwise direction to counterclockwise rotating.And, by the rotation of gyroaxis 31, movable contact 33 and deflection conductor 34 are rotated downwards.

Rotation by gyroaxis 31, the lever of adorning in gyroaxis 31 other ends 39 is rotated to clockwise direction in 40 compressions of elbow formula spring, in case surpass to connect the straight line of the revolution fulcrum 41 of the center of gyroaxis 31 and elbow formula spring 40, elbow formula spring 40 promptly unclamps and turns to the open-circuit position (with reference to Fig. 3) of movable contact 33.At this moment, can guarantee between the electrode of the electrode of fixation side and movable side, sufficient insulation distance (length L) is arranged.

By hook stick 36 (left among Fig. 1, Fig. 3) motion forwards, action lever 37 and intermediate connector 38 rotate to clockwise direction, are adorning in the pivoted lever 32 of gyroaxis 31 and are rotating to counter clockwise direction.And, by the rotation of gyroaxis 31, movable contact 33 and deflection conductor 34 are rotated upward.

Rotation by gyroaxis 31, the lever of adorning in gyroaxis 31 other ends 39 is rotated to counter clockwise direction in 40 compressions of elbow formula spring, in case surpass to connect the straight line of the revolution fulcrum 41 of the center of gyroaxis 31 and elbow formula spring 40, elbow formula spring 40 promptly unclamps movable contact 33 and then is connected (with reference to Fig. 1) with the finger contact 25 of fixation side.

As mentioned above, by seesawing of hook stick 36, can switch with the open mode that movable contact 33 separates the finger contact 25 that is connected and fixed side connection status and finger contact 25 with the movable contact 33 of movable side.Therefore, in the present invention, owing to can obtain insulation distance effectively in the space below the portion of opening circuit 22, even the very big occasion of short time electrical current and/or input capacity also can along vacant direction increase fixation side finger contact 25 quantity and increase the width of movable contact 33, can easily guarantee necessary insulation distance.

In addition, current path is roughly the shape of falling S under connection status because the shape of movable contact 33 and deflection conductor 34 is set to, and can offset electromagnetic repulsion force, can prevent that movable contact 33 from coming off along opening direction.

Fig. 6 a and Fig. 6 b are the partial enlarged drawing of portion of bindiny mechanism under the connection status of Fig. 1.In Fig. 6 a and Fig. 6 b, all and Fig. 1-Fig. 5 same section all adopts same label.On action lever 37, be provided with extension spring 42, and give action lever 37 clockwise rotating torques by extension spring 42.32a, 38a are respectively the pin that is located on pivoted lever 32, the intermediate connector 38.

Below explanation action.Under the connection status that connects finger contact 25 and movable contact 33, turn to the pin 32a rest position of the leading section 37a and the pivoted lever 32 of action lever 37, shown in Fig. 6 b, the pin 38a of intermediate connector 38 is the position above the straight line of the centre of gyration 37b of pin 32a that connects pivoted lever 32 and action lever 37.

In this state, from the position of the pin 38a of middle connector 38 action lever 37 is clockwise rotated the flywheel moment of direction by extension spring 42, because the leading section 37a of action lever 37 is resisted against and is adorning on the pin 32a of the pivoted lever on the gyroaxis 31 32, movable contact 33 and gyroaxis 31 can not rotate to opening direction (clockwise rotating direction) along connection status.Therefore can prevent reliably because external force such as electromagnetic repulsion force and coming off along the direction of opening of movable contact 33.

As mentioned above, in the switch of the present invention's the 1st technical scheme, system is connected the contact (movable contact) of movable side and links to each other with the conductor (fixed conductor) of fixation side and given by stage clip on the contact (a plurality of finger contact) of a plurality of fixation side of contact pressure, therefore, even owing to also can increase the contact (finger contact) of fixation side and increase the width of the contact (movable contact) of movable side along vacant direction in the very big occasion of short time electrical current or input capacity, so can guarantee the insulation distance of necessity.

In the switch of the present invention's the 2nd technical scheme, since the conductor (fixed conductor) that makes fixation side from the terminal of the parts casing pipe that opens circuit to oblique below bifurcated, make by stage clip and give of the vacant direction configuration of the contact (a plurality of finger contact) of a plurality of fixation side of contact pressure along the conductor (fixed conductor) of its fixation side, and be connected with the contact (movable contact) of movable side, therefore, can in space, obtain insulation distance effectively near the parts casing pipe terminal that opens circuit, because even the occasion that increases at short time electrical current or input capacity also can increase the contact (finger contact) of fixation side and increase the width of the contact (movable contact) of movable side along vacant direction, so can guarantee the insulation distance of necessity.

In the switch of the present invention's the 3rd technical scheme, because curved shape under the connection status in the contact (movable contact) of the movable side of current path on being installed in gyroaxis, therefore, electromagnetic repulsion force can be repealed by implication and prevents that the contact (movable contact) of movable side from coming off to opening direction.

In the switch of the present invention's the 4th technical scheme, since constitute with connector (intermediate connector) be configured in adorning in make on the rotating gyroaxis of movable side contact (movable contact) the 1st lever (pivoted lever) and and rotating the 2nd lever of the 1st lever (pivoted lever) rightabout (action lever) between, and the pin of its 1st lever (pivoted lever) is set in gyroaxis can not be to opening the rotating position of direction under movable side contact (movable contact) connection status because of external force from movable side contact (movable contact) and gyroaxis, therefore, can prevent from reliably to come off to the direction of opening of movable side contact (movable contact) because of the external force of electromagnetic repulsion force etc.

Claims

1. switch, it is characterized in that, comprise: the conductor of fixation side (24), the contact (25) of a plurality of fixation side that link to each other with described conductor, the contact (33) of the movable side that is connected with the contact of described fixation side gives the contact pressure between described fixation side conductor and the described fixation side contact and the spring (26) of the contact pressure between described fixation side contact and the described movable side contact.

2. switch, it is characterized in that, comprise: with the load side circuit ground in the closed distributing box time from the terminal (23) of the parts casing pipe that opens circuit that is connected with described load side circuit conductor (24) to the fixation side of oblique below bifurcated, the contact (25) of a plurality of fixation side that link to each other with described conductor, the contact (33) of the movable side that is connected with the contact of described fixation side gives the contact pressure between described fixation side conductor and the described fixation side contact and the spring (26) of the contact pressure between described fixation side contact and the described movable side contact.

3. switch as claimed in claim 1 or 2 is characterized in that, the contact of described movable side (33) be shaped as curve-like.

4. switch as claimed in claim 1 or 2 is characterized in that, also comprises: the gyroaxis (31) that movable side contact is installed; Adorning the 1st lever (32) on described gyroaxis; With rotating the 2nd lever of external motivating force (37); Be configured in the connector (38) between described the 1st lever and the 2nd lever, described connector arrives described the 1st lever (32) in order to the turning power back transfer with described the 2nd lever; And be located at pin (32a) on described the 1st lever (32), described pin suppresses owing to the external force from described movable side contact (33) and gyroaxis makes described two contacts of described gyroaxis to the revolution of opening direction under described movable side contact (33) and the contacted state of described fixation side contact (25).

5. switch as claimed in claim 3 is characterized in that, also comprises: the gyroaxis (31) that movable side contact is installed; Adorning the 1st lever (32) on described gyroaxis; With rotating the 2nd lever of external motivating force (37); Be configured in the connector (38) between described the 1st lever and the 2nd lever, described connector arrives described the 1st lever (32) in order to the turning power back transfer with described the 2nd lever; And the pin (32a) on being located on described the 1st lever (32), described pin suppresses owing to the external force from described movable side contact (33) and gyroaxis makes described two contacts of described gyroaxis to the revolution of opening direction under described movable side contact (33) and the contacted state of described fixation side contact (25).