CN2281020Y

CN2281020Y - Electric switch cabinet

Info

Publication number: CN2281020Y
Application number: CN 96227790
Authority: CN
Inventors: 安勇; 张念开; 牟强
Original assignee: ELECTRIC-APPLIANCE SWITCH FACTORY RIZHAO POWER ADMINSTRATION
Current assignee: ELECTRIC-APPLIANCE SWITCH FACTORY RIZHAO POWER ADMINSTRATION
Priority date: 1996-04-26
Filing date: 1996-04-26
Publication date: 1998-05-06
Anticipated expiration: 2006-04-26

Abstract

The utility model relates to an electric switch cabinet, which belongs to electric switch equipment and is used for enhancing the safety in electric operation. The utility model is characterized in that the cabinet is composed of a bus bar knife switch, a ground wire knife switch, and a breaker; a mutual interlocking gear of the bus bar knife switch and the ground wire knife switch, a mutual interlocking gear of the ground wire knife switch and a front and a back cabinet doors, and a blocking mechanism of the breaker and the knife switches are arranged in the cabinet. The utility model has the advantage of simple structure. Besides, because the bus bar and the ground wire knife switches can not be closed simultaneously, when the cabinet door does not transmit electricity during opening, and the cabinet door is not opened in a normal power supply, so the utility model has the advantages of safe use, strong adaptability for working environment, etc.

Description

Novel cabinet

The utility model belongs to the box interchange sealing switch equipment of a kind of fixing metal, particularly relates to a kind of cabinet that adopts isolated knife switch.

The designer of this utility model to present extensive use with patent documentation in disclosed cabinet study; therefrom find; improve safety guarantee in the electrical operation by some safety protection mechanism is set in cabinet, be people's common concern but do not solve fully as yet a problem.Relevant manufacturer makes great efforts and has carried out product reformation, has taked the multiple technologies scheme, has obtained certain effect, but because they have adopted devices such as oil switch, procedure lock, makes the switch cubicle blocking mechanism exist defectives such as complex structure, poor reliability.

It is a kind of simple and reasonable that the purpose of this utility model is to provide, novel cabinet safe and reliable to operation.

This novel cabinet, built-in bus bar knife switch, ground wire knife switch, circuit breaker, instrument transformer, the bus that adopts insulating sleeve to make supports and other additional device.Bus knife switch and ground wire knife switch are to drive its joystick by the outer handle of rotation cabinet to realize folding.Also be provided with a cover safety interlocking mechanism in this cabinet, mainly comprise:

A) bus cutter and ground wire knife switch mutual interlocking gear; Appropriate location on the joystick of bus cutter that is arranged in parallel and ground wire knife switch, an onesize roundel that has two arc notch respectively is housed, it is knife switch restraint wheel, with the fastening connection of joystick, can rotate or limit the rotation of joystick with joystick, and, when bus knife switch and ground wire knife switch all are in gate-dividing state, two arc notch of two knife switch restraint wheels are fully overlapping just, at this moment, two restraints wheel and two one control levers can not rotate simultaneously, have guaranteed that promptly bus knife switch and ground wire knife switch can not move simultaneously, thereby have avoided both to close a floodgate simultaneously.But do not influence manipulation any one knife switch action wherein, after one of them joystick being rotated its knife switches combined floodgate of 90 ° of drives, the substantial portion of this joystick upper limit driving wheel promptly embeds the gap portions of another restraint wheel, makes it and can't rotate, and promptly another knife switch can't close a floodgate.Thereby guaranteed that bus knife switch and ground wire knife switch have only one to be in closing position or all be in the separating brake position, have promptly realized the interlocking of bus cutter and ground wire knife switch.

B) circuit breaker tool setting circuit breaker lock mechanism; The main shaft of circuit breaker can drive a latch by a linkage and move as straight line, under circuit breaker is in on-state, if the bus knife switch is in closing position, then in the restraint hole on this latch insertion bus knife switch restraint wheel, promptly avoided moving at on-load situation Down Highway knife switch; If the ground wire knife switch is in closing position, then latch inserts in the restraint hole of ground wire knife switch restraint wheel, makes the ground wire cutter can't separating brake, has avoided mistake to divide ground wire knife switch and mistake to close the bus knife switch; If bus knife switch and ground wire knife switch all are in the separating brake position, then this latch inserts in two arc notch of two restraint wheels, makes the equal akinesia of two knife switches; Under circuit breaker was in off-state, this latch returned initial position, can handle knife switch deciliter.

C) ground wire knife switch and preceding rear cabinet door mutual interlocking gear are opened arm pivot post, the eccentric shifting block of rotating shaft the inner and the intermediate bar that is positioned between the two by semicircle block on the ground wire knife switch joystick and cabinet door and are formed.Intermediate bar has a cannelure near handle one end, and the eccentric shifting block of arm pivot post the inner can be free to slide in groove, and turning handle after the cabinet door is closed can be stirred intermediate bar and make it to move as straight line.When the bus knife switch was in "on" position, the ground wire knife switch was in the separating brake position, and the semicircle block on the ground wire knife switch joystick blocks intermediate bar, make it and to move, thereby handle can not rotate, and the cabinet door promptly can't be opened, and has avoided maintainer's mistakenly entering charged chamber.Having only when the bus knife switch is in the separating brake position is after the ground wire knife switch closes a floodgate; semicircle block rotates 90 ° with ground wire knife switch joystick; just preceding rear cabinet door can be opened; and this moment, intermediate bar blocked semicircle block; make it and can't rotate, the ground wire knife switch can't be opened, and promptly the bus knife switch can't close a floodgate; avoided under the situation that the cabinet door is opened, closing a floodgate and sent electricity, played of the effect of the protection person with device security.

Said ground wire knife switch and cabinet door mutual interlocking gear can respectively be established a cover at front and back door place, structure is identical with principle, action synchronously, therefore, as long as the ground wire knife switch is in gate-dividing state, preceding rear cabinet door all can not be opened, otherwise, as long as before and after Men Youyi is opening, then the ground wire knife switch promptly can't separating brake, thus the bus knife switch can't close a floodgate and gives.

By above structural analysis as can be seen, what this novel cabinet adopted is the full mechanical lock of a cover, so good reliability; Though relatively simple for structure, successfully solved between bus knife switch and the ground wire knife switch, between circuit breaker and the knife switch and the locking between knife switch and the preceding rear cabinet door, can satisfy in the electrical operation requirement fully to fail safe.

The accompanying drawing part further discloses the technical characterictic of the utility model specific embodiment, wherein,

Fig. 1 is novel cabinet interior arrangement schematic diagram;

Fig. 2 is a bus knife switch separating brake, the restraint wheel location figure when the ground wire knife switch closes a floodgate;

Fig. 3 closes a floodgate the restraint wheel location figure during ground wire knife switch separating brake for the bus knife switch;

Restraint wheel location figure when Fig. 4 is gate-dividing state for bus knife switch and ground wire knife switch;

Fig. 5 is a circuit breaker tool setting circuit breaker lock structural scheme of mechanism;

Fig. 6 by along Figure 1A to being looked ground wire cutter and preceding rear cabinet door mutual interlocking gear part sectioned view;

Fig. 7 is cabinet door handle and intermediate bar (17) transmission schematic diagram.

Partly be further described below in conjunction with accompanying drawing:

Novel cabinet as shown in Figure 1, device has bus knife switch (2), ground wire knife switch (3) and circuit breaker (4) in cabinet (1).Bus knife switch (2) is to drive folding by joystick (5) and joystick (6) respectively with ground wire knife switch (3).In addition, be provided with a cover safety interlocking mechanism in this cabinet, mainly comprise:

Fig. 2, Fig. 3, bus cutter and ground wire knife switch mutual interlocking gear shown in Figure 4; Same end is gone up in joystick (5) and (6) at bus cutter that is arranged in parallel and ground wire knife switch, an onesize roundel that has two arc notch (11) respectively is housed, it is bus knife switch restraint wheel (12) and ground wire knife switch restraint wheel (13), with the fastening connection of joystick, can rotate or limit the rotation of joystick with joystick, and, as shown in Figure 4, when bus knife switch and ground wire knife switch all are in gate-dividing state, two arc notch (11) of two knife switch restraint wheels are fully overlapping just, at this moment, two restraints wheel and two one control levers can not rotate simultaneously, guaranteed that promptly bus knife switch and ground wire knife switch can not move simultaneously, thereby avoided both to close a floodgate simultaneously; But can handle any one action wherein, as Fig. 2, shown in Figure 3, after one of them joystick being rotated its knife switches combined floodgate of 90 ° of drives with handle, the substantial portion of this joystick upper limit driving wheel promptly screws in the gap portions of another restraint wheel, make it and to rotate, be that another knife switch can't close a floodgate, thereby guaranteed that bus knife switch and ground wire knife switch have only one to be in closing position or all be in the separating brake position, have promptly realized the interlocking of bus cutter and ground wire knife switch.

Circuit breaker tool setting circuit breaker lock mechanism shown in Figure 5; The main shaft (10) of circuit breaker (4) can drive a latch (7) by a linkage (9) and move as straight line, under circuit breaker is in on-state, if the bus knife switch is in closing position, then in the restraint hole (14) on this latch insertion bus knife switch restraint wheel (12), as shown in Figure 3, promptly avoided moving at on-load situation Down Highway knife switch; If the ground wire knife switch is in closing position, then latch (7) inserts in the restraint hole (15) of ground wire knife switch restraint wheel (13), as shown in Figure 2, makes the ground wire cutter can't separating brake, has avoided mistake to divide ground wire knife switch and mistake to close the bus knife switch; When if bus knife switch and ground wire knife switch all are in the separating brake position, then this latch inserts in two arc notch (11) of two restraint wheels, as shown in Figure 4, makes the equal akinesia of two knife switches, thereby has avoided mistake to close the bus cutter, with protection against electric shock.Under circuit breaker was in off-state, this latch returned initial position.

Fig. 6, ground wire knife switch and cabinet door mutual interlocking gear shown in Figure 7, opening arm pivot post (16) and inner eccentric shifting block (26) and the intermediate bar (17) that is positioned between the two thereof by semicircle block (8) on the ground wire knife switch joystick and cabinet door forms, intermediate bar (17) has a cannelure (25) near handle one end, the eccentric shifting block (26) of arm pivot post the inner can slide in groove, turning handle after the cabinet door is closed, can stir intermediate bar (17), make it to move as straight line; When the bus knife switch was in "on" position, the ground wire knife switch was in the separating brake position, and the semicircle block (8) on the ground wire knife switch joystick blocks intermediate bar (17), make it and to move, thereby handle can not rotate, and the cabinet door promptly can't be opened, and has avoided maintainer's mistakenly entering charged chamber; Having only when the bus knife switch is in the separating brake position is after the ground wire knife switch closes a floodgate; semicircle block rotates 90 °; just preceding rear cabinet door can be opened; and intermediate bar this moment (17) blocks semicircle block (8); make it and can't rotate, the ground wire knife switch can't be opened, and promptly the bus knife switch can't close a floodgate; avoided under the situation that the cabinet door is opened, closing a floodgate and sent electricity, played of the effect of the protection person with device security.

In addition, as shown in Figure 4, knife switch restraint wheel is mounted on the switch cubicle one front-operated plate (18), can utilize a fastening bolt and a check ring to make it be attached at plate face inboard, prevents that it from axially rocking.

Fig. 4, shown in Figure 5 for another example, be respectively arranged with alignment pin (20) and (19) on bus knife switch restraint wheel (12) and the ground wire knife switch restraint wheel (13), on the front-operated plate (18) that knife switch restraint wheel is installed, positioning hole corresponding (21) and (23) are arranged in addition, when knife switch separates or close a floodgate, alignment pin inserts in the location hole of operation panel, in case knife switch moves because of accidental external force.

On the front mounting panel (18) shown in Figure 4, respectively have one 90 ° of arc grooves (24) and (22) in the relevant position that two knife switch restraint wheels are installed, its center of arc driving wheel center of exceeding, radius driving wheel center and the restraint wheel that exceeds is gone up the centre-to-centre spacing at alignment pin center, with the location hole on the mounting panel of front is an end points, along the rotation direction half-twist of restraint wheel, the width of arc groove is advisable with the diameter that is a bit larger tham alignment pin, and the degree of depth is to be advisable less than thickness of slab; After extract in the self-align hole of alignment pin, can in arc groove, slide 90 °, guaranteed that the rotational angle of restraint wheel and knife switch joystick can only be 90 °, thereby guaranteed knife switch folding certain distance.

Claims

1, a kind of novel cabinet has cabinet [1], built-in bus bar knife switch [2], ground wire knife switch [3], circuit breaker [4] and instrument transformer; Above-mentioned bus knife switch [2] drives its joystick [5] with ground wire knife switch [3] by the outer handle of cabinet and [6] realize folding, it is characterized in that, is provided with a cover safety interlocking mechanism in this cabinet, mainly comprises:

A) bus cutter and ground wire knife switch mutual interlocking gear; It constitutes with [13] by being anchored on the disc-shaped knife switch restraint wheel [12] that respectively has two arc notch [11] on above-mentioned bus cutter and ground wire knife switch joystick [5] and [6], when bus knife switch and ground wire knife switch all are in gate-dividing state, two arc notch [11] of these two knife switch restraint wheels are overlapping fully just, after one of them joystick being rotated its knife switches combined floodgate of 90 ° of drives, the entity part of this joystick upper limit driving wheel promptly embeds the gap portions of another restraint wheel, female, two knife switch interlockings;

B) circuit breaker [4] tool setting circuit breaker lock mechanism, it drives latch [7] formation that moves as straight line by the main shaft [10] of circuit breaker [4] with by a linkage [9], be at circuit breaker [4] and connect and bus knife switch when being in closing position, then in the restraint hole [14] on this latch [7] insertion bus knife switch restraint wheel [12], when the ground wire knife switch is in closing position, then latch [7] inserts in the restraint hole [15] of ground wire knife switch restraint wheel [13], when bus knife switch and ground wire knife switch all are in the separating brake position, then this latch [7] inserts in two arc notch [11] of two restraint wheels, when being in off-state, this latch [7] returns initial position at circuit breaker [4];

C) ground wire knife switch and cabinet door mutual interlocking gear, it opens arm pivot post [16] by first rounded stops of ground wire knife switch joystick [8] and cabinet door, eccentric shifting block [26] on rotating shaft the inner and the intermediate bar [17] that is positioned at are between the two formed, above-mentioned arm pivot post [16] is vertical mutually with intermediate bar [17], intermediate bar [17] has the cannelure [25] that an eccentric shifting block [26] can slide within it near handle one end, when the ground wire knife switch is in the separating brake position, semicircle block [8] on the ground wire knife switch joystick [6] blocks intermediate bar [17] cabinet door and closes, have only the bus knife switch of working as to be in the separating brake position, after the ground wire knife switch closes a floodgate, semicircle block [8] rotates 90 ° with ground wire knife switch joystick [6], just preceding rear cabinet door can be opened.And intermediate bar this moment [17] blocks semicircle block [8] and stops to send.

2, novel cabinet according to claim 1, its feature are that also above-mentioned knife switch restraint wheel [12] is mounted on the switch cubicle front mounting panel [18] with [13], and by a fastening bolt and a check ring its card is invested on the plate face.

3, novel cabinet according to claim 2, its feature also is, be respectively arranged with an alignment pin [20] and [19] on above-mentioned knife switch restraint wheel [12] and [13], positioning hole corresponding [21] and [23] are arranged on the front mounting panel [18] that knife switch restraint wheel is installed in addition, when knife switch separated and/or close a floodgate, this alignment pin inserted in the location hole of front mounting panel [18].

4, according to claim 2 and 3 described novel cabinets, its feature also is, on the above-mentioned front mounting panel [18], respectively has one 90 ° of arc grooves [24] and [22] in the relevant position that two knife switch restraint wheels are installed.

5, novel cabinet according to claim 1, its feature are that also its cabinet has former and later two cabinet doors, and said ground wire knife switch and cabinet door mutual interlocking gear can respectively be established a cover at front and back door place.