CN100346436C

CN100346436C - Circuit breaker

Info

Publication number: CN100346436C
Application number: CNB2003801049068A
Authority: CN
Inventors: 森藤英二; 中务直行
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2003-12-19
Filing date: 2003-12-19
Publication date: 2007-10-31
Anticipated expiration: 2023-12-19
Also published as: JPWO2005062325A1; TWI260663B; CN1802720A; JP4352050B2; WO2005062325A1; TW200522111A

Abstract

The present invention relates to a circuit breaker, which comprises a movable conductive body (1), an insulating frame (7), an insulating rod (13) and an operating mechanism (10), wherein the conductive body (1) is used for connecting, breaking and grounding a circuit, the insulating frame (7) is used for fixing an input terminal (3), a connecting terminal part (5) and a grounding terminal part (6), the insulating rod (13) can drive the movable conductive body (1), and the operating mechanism (10) can carry out the control of position of the movable conductive body (1) through the insulating rod (13). The present invention is characterized in that the movable conductive body (1) moves in a straight line by using the operating mechanism (10), the input terminal part (3) contacts the connecting terminal part (5) through the movable conductive body (1), which leads the circuit into a connection state; the input terminal part (3) contacts the grounding terminal part (6) through the movable conductive body (1), which leads the circuit into a grounding state, and the circuit is in an off state by making the movable conductive body (1) only contact the input terminal part (3).

Description

Circuit breaker

Technical field

The present invention relates to circuit is connected the structure of the circuit breaker (being also referred to as three point breakers) of the ground connection of opening circuit.

Background technology

For example, in Japanese patent laid-open 3-272529 communique, has the movable platen that can be journaled into rotationally on the hinge; The operating axis that will be connected with earth terminal, movable platen with the fixedly contact terminal of this movable platen contact; And in the 3 position trippers of bearing of supporting operating axis, disclosed and a kind ofly on same insulation supporting material, fixed fixing contact terminal, pivot is equipped with hinge, the bearing of movable platen, the tripper (circuit breaker) of earth terminal rotationally.

In this tripper in the past, as the movable platen of the member that constitutes main circuit, earth terminal and fixing contact terminal, insulation supporting material is being mounted integratedly relatively.

And, operating mechanism is installed in the outer side of the framework of switch gear, utilize connecting rod (action bars) that main circuit is constituted between portion and the operating mechanism and be connected.

In the tripper of Japanese patent laid-open 3-272529 communique record, main circuit not being constituted portion and operating mechanism makes integrated, after main circuit being constituted on the framework part that portion and operating mechanism be installed in switch gear respectively, need carry out the adjustment operation of the link position off position earthing position of movable platen, because it is hidden in the switch gear framework that main circuit is constituted portion, so there is the problem that increases the adjustment time.

The problem that also has the manufactured size precision that to guarantee the switch gear framework.

Again, open in the 2002-218611 communique the Japan Patent spy, disclosed following gas insulation opening and closing arrangement, this device comprises: have the fixed contact that is connected with the terminal of the movable contact side of breaker, be disposed at the below of breaker and be installed in by insulation supporting material and be supported in the 1st travelling contact on the conductor on the framework that is fixed in the breaker single-unit container and operate the 1st operating mechanism of the 1st travelling contact, the line side circuit breaker that the operating axis of the 1st operating mechanism is derived and is connected with the output shaft of operator outside the breaker single-unit container; Have the fixed contact that is installed on the conductor, be installed in the 2nd travelling contact on the framework and operate the 2nd operating mechanism of the 2nd travelling contact, the line side grounding opening-closing device that the operating axis of the 2nd operating mechanism is derived and is connected with the output shaft of operator outside the breaker single-unit container.

That is, disclosed and utilize different 2 movable electrodes (travelling contact) to constitute to connect the gas insulation opening and closing arrangement open circuit ground connection.

Like this, open in the circuit breaker shown in the gas insulation opening and closing arrangement of 2002-218611 communique the Japan Patent spy, need 2 movable electrodes (travelling contact) in order to constitute link position off position earthing position, so become complicated with the connecting portion of operating mechanism, and because the part number increase of main circuit formation portion, so existence can not realize the problem of miniaturization.

Summary of the invention

The present invention makes in order to address the above problem, and its 1st purpose is, provides can shorten assembling and adjust three point breakers of operation required time and productivity ratio excellence (that is, circuit is connected, ground connection, the circuit breaker that opens circuit).

Again, the 2nd purpose is, but provides that implement device simplifies the structure, the minimizing of the densification of main circuit constituent part and part number and three point breakers of miniaturization.

Again, the 3rd purpose is, three point breakers that can improve withstand voltage properties are provided.

In the present invention, provide a kind of circuit breaker, have: but circuit is connected the earthy moving-conductor that opens circuit; The distance ground fixed configurations that is separated with regulation mutually has the insulating support of input terminal portion, splicing ear portion and earth terminal portion; But the insulating bar that above-mentioned moving-conductor electric insulation ground is driven; But carry out the operating mechanism of the Position Control of above-mentioned moving-conductor by above-mentioned insulating bar, but utilize aforesaid operations mechanism to make above-mentioned moving-conductor carry out rectilinear motion,, above-mentioned input terminal portion make circuit become connection status by but being contacted through above-mentioned moving-conductor and with above-mentioned splicing ear portion,, above-mentioned input terminal portion make circuit become ground state by but being contacted through above-mentioned moving-conductor and with earth terminal portion, but, above-mentioned moving-conductor make circuit become off state by only being contacted with above-mentioned input terminal portion, described input terminal portion is disposed at the central portion of insulating support, and described splicing ear portion and earth terminal portion are disposed at the both sides of described input terminal portion respectively at the two ends of described insulating support.

Therefore, adopt the present invention, but utilization has made and has only made moving-conductor carry out the structure of straight-line simplification, owing to can obtain wantonly 1 state of connection status, off state or the ground state of circuit, can make assembling adjust the circuit breaker (three point breakers) that the required time of operation shortens so can provide.

In addition, can provide the minimizing of the densification of the main circuit formation portion that realized (that is, but moving-conductor, input terminal portion, splicing ear portion, earth terminal portion, insulating support etc.) and part number and the circuit breaker (three point breakers) of miniaturization.

Again, adopt the present invention, owing to integrated with making on operating mechanism and the insulating support stuck-at-piece intermediate plate, but and because easily to confirming by the Position Control situation of the performed moving-conductor of operating mechanism, so the adjustment operation is more oversimplified.

Description of drawings

Fig. 1 is the cutaway view of the breaker structure of expression the invention process form 1.

Fig. 2 is the cutaway view of the II-II line of Fig. 1.

Fig. 3 is the figure that the connection status of the circuit breaker of example 1, off state, ground state is described usefulness.

Fig. 4 is the cutaway view of employed insulating support structure in the circuit breaker of expression example 2.

Fig. 5 is the figure that employed insulating support structure describes usefulness in the circuit breaker to example 3.

Fig. 6 is the cutaway view of the breaker structure of expression example 4.

Fig. 7 is the cutaway view of the VII-VII line of Fig. 6.

Fig. 8 is the figure of another structure example of employed insulating support in the circuit breaker of expression example 4.

Fig. 9 is the cutaway view of the IX-IX line of Fig. 8.

Figure 10 is the cutaway view of the breaker structure of expression the invention process form 5.

Figure 11 is the cutaway view of the breaker structure of expression the invention process form 6.

Figure 12 is the figure that the connection status of the circuit breaker of example 6, off state, ground state is described usefulness.

Embodiment

[example 1]

Fig. 2 is the cutaway view of the II-II line of Fig. 1.

As shown in Figure 1, the main circuit formation portion of the circuit breaker of this example has following structure: but but by circuit being connected the earthy moving-conductor 1 that opens circuit, input terminal 3, utilizing energising contact 31 to keep reliably with but moving-conductor 1 is electric to contact and input terminal portion that the straight-line cylinder conductor 2 of maintenance moving-conductor 1, conductor 4 that cylinder conductor 2 and input terminal 3 are electrically connected and fix constitute; But constitute with energising contact 32 and contact the splicing ear portion that the connection status that obtains circuit is used with above-mentioned input terminal portion by moving-conductor 1 by splicing ear 5; But constitute with energising contact 33 and contact the earth terminal portion that the ground state that obtains circuit is used with above-mentioned input terminal portion by moving-conductor 1 by earth terminal 6.

And input terminal 3, splicing ear 5 and earth terminal 6 utilize bolt 9 to be fixed on the insulating support 7 of tubular (for example cylindric).

Promptly, with input terminal portion, splicing ear portion and earth terminal portion, the distance ground fixed configurations that is separated with regulation is on the insulating support 7 of tubular, but make moving-conductor 1 carry out rectilinear motion, but above-mentioned input terminal portion is contacted with above-mentioned splicing ear portion and circuit is made connection status by moving-conductor 1, input terminal portion is contacted with earth terminal portion and circuit is made ground state by movable conductor portion, by movable conductor portion only being contacted with input terminal portion and circuit being made off state.

But moving-conductor 1 is fixed on the main circuit side end of insulating bar 13.

The rotation of the jack shaft 11 by operating mechanism 10 makes insulating bar 13 carry out linear drives, but the moving-conductor 1 that is fixed on the end of insulating bar 13 also moves to rectilinear direction.

Again, from Fig. 1 and Fig. 2 as can be known, in the circuit breaker of this example, 3 phase tubular insulating supports 7 are installed on 1 intermediate plate 8, but and will make 3 mutually moving-conductors 1 carry out straight-line operating mechanism 10 and also be installed on the intermediate plate 8.

That is, operating mechanism 10 with 3 mutually insulating support 7 be fixed on 1 intermediate plate and make integrated.

Again, be configured in the operating mechanism 10 on the intermediate plate 8, utilize jack shaft 11 being connected with operating portion (not shown).

But moving-conductor 1 utilizes insulating bar 13 being connected by electric insulation and with operating mechanism 10.

In addition, on cylinder conductor 2, splicing ear 5 and earth terminal 6, assembling

energising contact

31,32,33 respectively.

As the energising contact, have the structure of belt form or the structure of helical spring shape etc.

Fig. 3 is the figure that the connection status of the circuit breaker of this example, off state, ground state is described usefulness, state when Fig. 3 (a) expression connects circuit, state when the state when Fig. 3 (b) represents circuit breaker, Fig. 3 (c) are represented circuit ground.

For circuit is made connection status, but the insulating bar 13 that utilizes operating mechanism 10 will fix moving-conductor 1 in the end carries out linear drives to the direction of splicing ear 5.

And, in the connection status of circuit, shown in Fig. 3 (a), but, make the input terminal portion that constitutes by input terminal 3, cylinder conductor 2, conductor 4 and energising contact 31 etc. and contact and be electrically connected with the splicing ear portion that the contact 32 of switching on constitutes by splicing ear 5 by carrying out the moving-conductor 1 that straight line moves to the direction of splicing ear 5.

For circuit is made ground state, but the insulating bar 13 that utilizes operating mechanism 10 will fix moving-conductor 1 in the end carries out linear drives to the direction of earth terminal 6.

And, in ground state, shown in Fig. 3 (c), but, make the input terminal portion that constitutes by input terminal 3, cylinder conductor 2, conductor 4 and energising contact 31 etc. and contact and be electrically connected with the earth terminal portion that the contact 33 of switching on constitutes by earth terminal 6 by carrying out the moving-conductor 1 that straight line moves to the direction of earth terminal 6.

Again, for circuit is made off state, shown in Fig. 3 (b), but moving-conductor 1 is not contacted with splicing ear portion and earth terminal portion, it is just passable only to make the state that is connected with the contact of input terminal portion.

That is,, utilize operating mechanism 10 to make insulating bar 13 carry out linear drives, as long as but that moving-conductor 1 is only stopped at input terminal portion position contacting is just passable in order to obtain the off state of circuit.

As mentioned above, the circuit breaker of this example, constitute: but utilize operating mechanism 10 to make moving-conductor 1 carry out rectilinear motion, but input terminal portion is contacted with splicing ear portion and circuit is made connection status by moving-conductor 1, but input terminal portion is contacted with earth terminal portion and circuit is made ground state, but by moving-conductor 1 only being contacted with input terminal portion and circuit being made off state by moving-conductor 1.

Therefore, but since be only make moving-conductor 1 carry out rectilinear motion, be a kind of simple structure that can obtain connection status, off state or the ground state of circuit, assemble the adjustment required time of operation so can shorten.

In addition, because structure is simple, so can realize the densification and the miniaturization of main circuit formation portion by reducing the part number.

By integrated, but just easily the Position Control situation of the performed moving-conductor 1 of operating mechanism 10 is confirmed, can be made that adjusting operation more oversimplifies with making on operating mechanism 10 and the insulating support 7 stuck-at-piece pars intermedias 8 again.

[example 2]

Fig. 4 is the cutaway view of structure of employed insulating support 7 in the circuit breaker of expression example 2.

In the circuit breaker of aforesaid example 1, be provided with the insulating support 7 that the distance ground fixed configurations that is separated with regulation mutually has the monomer of input terminal portion, splicing ear portion and earth terminal portion on mutually at each, and in this example, as shown in Figure 4, make 3 phase insulating supports integrally formed.

Thus, do not need the insulating support 7 with each monomer that is provided with accordingly is installed in respectively on the intermediate plate 8, can further improve assembleability.

[example 3]

Fig. 5 is the figure that employed insulating support structure describes usefulness in the circuit breaker to example 3, and Fig. 5 (a) is and Fig. 1 cutaway view of seeing of direction equally from the side that Fig. 5 (b) is a vertical view.

The circuit breaker of this example is characterized in, for example is provided with blow vent 20 on the insulating support 7 of the circuit breaker of example 1.

As shown in Figure 5, blow vent 20 is located at the top and the bottom of the splicing ear portion side and the earth terminal portion side of insulating support 7.

In addition, the position that blow vent 20 is set is not limited to position shown in Figure 5.

Among the figure, the arrow of representing with symbol A is a direction of representing air flows, but by the convection current cooling effectiveness that blow vent 20 can further improve the moving-conductor 1 of forming circuit is set.

Also has the effect that can prevent that the foreign conducting matter that might take place from making the surperficial withstand voltage properties of insulating support 7 reduce attached to the inner face of insulating support 7 when connecting moves again.

[example 4]

Fig. 6 is the cutaway view of the breaker structure of expression example 4.

Again, Fig. 7 is the cutaway view of the VII-VII line of Fig. 6.

Employed insulating support 7 is tubulars in aforementioned example 1 or 3 the circuit breaker, and the insulating support of the circuit breaker of this example such as Fig. 6 or shown in Figure 7, be characterized in, constitute by relative 2 flat supporting structure things (tabular insulating component 7a, 7b) at least.

By insulating support is made tabular, compare with the situation of tubular, can improve the productivity ratio of insulating support.

In addition, Fig. 8 is the figure of another structure example of employed insulating support in the circuit breaker of expression example 4, and Fig. 9 is the cutaway view of the IX-IX line of Fig. 8.

In the example of Fig. 6, Fig. 7,2 flat supporting structure things (being tabular insulating component 7a, 7b) are configured to parallel up and down, and in the example of Fig. 8, Fig. 9,2 flat supporting structure things (being tabular insulating component 7a, 7b) are configured to vertical direction.

In the example of Fig. 8, Fig. 9, also can acquisition and the same effect of example of Fig. 6, Fig. 7.

[example 5]

In the circuit breaker of aforesaid example 1, constitute the earth terminal 6 of the input terminal 3 of input terminal portion, the splicing ear 5 that constitutes splicing ear portion and formation earth terminal portion, be mounted in the structure on the single insulating support 7 that makes tubular respectively, and in the circuit breaker of this example, as shown in figure 10, be characterized in, when insulating support 7 being formed making, imbed input terminal 3, splicing ear 5 and earth terminal 6 simultaneously.

That is, be characterized in that input terminal portion, splicing ear portion and earth terminal portion are shaped integratedly with insulating support 7.

Owing to when the shaping of insulating support 7, imbed simultaneously,, can further improve assembleability so do not need to install the bolt class that input terminal portion, splicing ear portion and earth terminal portion use.

[example 6]

Figure 11 is the cutaway view of the breaker structure of expression example 6.

In the circuit breaker of aforementioned example 1, but, be that the rotation by the jack shaft 10 that is connected with not shown operating portion makes insulating bar 13 carry out straight-line structure as making moving-conductor 1 carry out straight-line mechanism.

Different with it, the circuit breaker of this example as shown in figure 11, be characterized in, but on moving-conductor 1, be provided with hollow bulb, on the inner peripheral surface of this hollow bulb, form in the negative thread, the screw rod 14 that will be formed with the pin thread that screws togather with this negative thread is fixed on the end of the main circuit side of insulating bar 13, but this screw rod 14 is embedded in the hollow bulb of moving-conductor 1.

In the circuit breaker that constitutes like this, by making insulating bar 13 rotations, the screw rod 14 that is fixed on the insulating bar 13 also rotates.

But formed negative thread screws togather on the hollow bulb inner peripheral surface of formed pin thread and moving-conductor 1 on the screw rod 14 owing to make, so but can make moving-conductor 1 carry out rectilinear motion by screw rod 14 is rotated.

Thus, the motion space of jack shaft 10 can be omitted, more compact structure can be made.

In addition, Figure 12 is the figure that the connection status of the circuit breaker of example 6, the shape .0 attitude that opens circuit, ground state is described usefulness, state when the state the when state when Figure 12 (a) expression connects circuit, Figure 12 (b) are represented circuit breaker, Figure 12 (c) are represented circuit ground.

From figure as can be known, by making insulating bar 13 rotation, insulating bar 13 and the screw rod 14 that is fixed on the end of insulating bar 13 do not carry out rectilinear motion, but moving-conductor 1 according to the direction of rotation of insulating bar 13 to splicing ear side or earth terminal side shifting.

Therefore, same with the situation of example 1, can obtain connection status, ground state and the off state of circuit.

In this example, because the motion space that can omit jack shaft 10, so can make more compact structure.

[utilizability on the industry]

The present invention is for realizing that assembling adjusts the easiness of operation, and can realize three point breakers of miniaturization (can obtain connection status, the ground state of circuit, the breaker of off state) is effective.

Claims

1, a kind of circuit breaker has: but circuit is connected the earthy moving-conductor (1) that opens circuit; The distance ground fixed configurations that is separated with regulation mutually has the insulating support (7) of input terminal portion (3), splicing ear portion (5) and earth terminal portion (6); But the insulating bar (13) that above-mentioned moving-conductor (1) electric insulation ground is driven; By above-mentioned insulating bar (13) but carry out the operating mechanism (10) of the Position Control of above-mentioned moving-conductor (1), it is characterized in that,

Utilize aforesaid operations mechanism, (10) but make above-mentioned moving-conductor, (1) carries out rectilinear motion, by making above-mentioned input terminal portion, (3) but through above-mentioned moving-conductor, (1) and with above-mentioned splicing ear portion, (5) contact and make circuit become connection status, by making above-mentioned input terminal portion, (3) but through above-mentioned moving-conductor, (1) and with earth terminal portion, (6) contact and make circuit become ground state, but by making above-mentioned moving-conductor, (1) only with above-mentioned input terminal portion, (3) contact and make circuit become off state

Described input terminal portion (3) is disposed at the central portion of insulating support (7), and described splicing ear portion (5) and earth terminal portion (6) are disposed at the both sides of described input terminal portion (3) respectively at the two ends of described insulating support (7).

2, circuit breaker as claimed in claim 1 is characterized in that, aforesaid operations mechanism (10) and above-mentioned insulating support (7) stuck-at-piece intermediate plate (8) are gone up and is formed integrated.

3, circuit breaker as claimed in claim 1 or 2 is characterized in that, 3 phase insulating supports (7) form.

4, circuit breaker as claimed in claim 1 or 2 is characterized in that, above-mentioned insulating support (7) is a tubular, has blow vent (20) on side surface part.

5, circuit breaker as claimed in claim 1 or 2 is characterized in that, above-mentioned insulating support (7) is made of 2 tabular insulating components (7a, 7b) of relative configuration.

6, circuit breaker as claimed in claim 1 or 2 is characterized in that, above-mentioned input terminal portion (3), splicing ear portion (5) and earth terminal portion (6) are shaped integratedly with above-mentioned insulating support (7).

7, circuit breaker as claimed in claim 3 is characterized in that, above-mentioned input terminal portion (3), splicing ear portion (5) and earth terminal portion (6) are shaped integratedly with above-mentioned insulating support (7).

8, circuit breaker as claimed in claim 4 is characterized in that, above-mentioned input terminal portion (3), splicing ear portion (5) and earth terminal portion (6) are shaped integratedly with above-mentioned insulating support (7).

9, circuit breaker as claimed in claim 1 or 2, it is characterized in that, but above-mentioned moving-conductor (1) is cylindric, be formed with negative thread on the empty therein portion inner peripheral surface, fixing the screw rod (14) that is formed with the pin thread that screws togather with above-mentioned negative thread on the end of above-mentioned insulating bar (13), by making above-mentioned insulating bar (13) but the rotation make above-mentioned moving-conductor (1) carry out rectilinear motion.

10, circuit breaker as claimed in claim 3, it is characterized in that, but above-mentioned moving-conductor (1) is cylindric, be formed with negative thread on the empty therein portion inner peripheral surface, fixing the screw rod (14) that is formed with the pin thread that screws togather with above-mentioned negative thread on the end of above-mentioned insulating bar (13), by making above-mentioned insulating bar (13) but the rotation make above-mentioned moving-conductor (1) carry out rectilinear motion.

11, circuit breaker as claimed in claim 4, it is characterized in that, but above-mentioned moving-conductor (1) is cylindric, be formed with negative thread on the empty therein portion inner peripheral surface, fixing the screw rod (14) that is formed with the pin thread that screws togather with above-mentioned negative thread on the end of above-mentioned insulating bar (13), by making above-mentioned insulating bar (13) but the rotation make above-mentioned moving-conductor (1) carry out rectilinear motion.

12, circuit breaker as claimed in claim 5, it is characterized in that, but above-mentioned moving-conductor (1) is cylindric, be formed with negative thread on the empty therein portion inner peripheral surface, fixing the screw rod (14) that is formed with the pin thread that screws togather with above-mentioned negative thread on the end of above-mentioned insulating bar (13), by making above-mentioned insulating bar (13) but the rotation make above-mentioned moving-conductor (1) carry out rectilinear motion.

13, circuit breaker as claimed in claim 6, it is characterized in that, but above-mentioned moving-conductor (1) is cylindric, be formed with negative thread on the empty therein portion inner peripheral surface, fixing the screw rod (14) that is formed with the pin thread that screws togather with above-mentioned negative thread on the end of above-mentioned insulating bar (13), by making above-mentioned insulating bar (13) but the rotation make above-mentioned moving-conductor (1) carry out rectilinear motion.