CN2116976U

CN2116976U - Electric switch carbinet

Info

Publication number: CN2116976U
Application number: CN 92213412
Authority: CN
Inventors: 胡维保; 周全喜; 李鸿儒; 尹启贵; 翟伟林
Original assignee: ZHENJIANG ELECTRICAL APPLIANCE
Current assignee: ZHENJIANG ELECTRICAL APPLIANCE
Priority date: 1992-03-11
Filing date: 1992-03-11
Publication date: 1992-09-23

Abstract

The utility model relates to an electric switch cabinet, which belongs to a box type fixing switch cabinet with a metal closed structure. A blade of an isolating knife switch in a cabinet is provided with a cam press plate linkage mechanism to ensure the firm contact of switch contacts, and the operation of opening and closing a brake is labor-saving and space-saving. A mechanical interlocking mechanism is arranged between a knife switch and a cabinet door, and a grounding wire box which can restrict the opening and the closing of the cabinet door is arranged near the cabinet door. Therefore, the mutual restriction and interlock among the opening and the closing of the isolating knife switch and the cabinet door and the attaching and the abruption of a grounding wire can be achieved; so that false operation accidents can be avoided.

Description

Electric switch carbinet

The utility model belongs to a kind of cabinet, especially a kind of box fixed switchgear.

Box fixed switchgear is as the indoor controller switching equipment of accepting and distribute electric energy, and it comprises several parts such as bus isolating switch, line disconnecting switch, bypass isolating switch, instrument transformer and circuit breaker and earthing device etc.This switch cubicle, especially high-tension switch cabinet can make metal enclosed structure, and the cabinet skeleton is bent by gusset and is welded, and the metal partion (metp) with ground connection in the cabinet is separated into bus disconnecting link chamber, instrument transformer and breaker chamber; Adopt the insulating wall sleeve to support as bus.The weak point of this type of switch cubicle is: the spring pre-pressing structure of (1) switch isolation switch contact causes the breaking-closing operating effort, and device damages easily and takes up room greatly, all makes troubles for operating maintenance; (2) between isolation switch, earth connection and the cabinet door, lack safe and reliable interlock, cause misoperation fault easily.

The purpose of this utility model is that original box switch cubicle structure is improved, to overcome above-mentioned technological deficiency.

Specific embodiments of the present utility model is illustrated in conjunction with following accompanying drawing:

Fig. 1 is a cabinet overall structure schematic diagram described in the utility model.

Fig. 2 is an electrical isolation disconnecting link structural representation described in the utility model (front view).

Fig. 3 is an electrical isolation disconnecting link structural representation described in the utility model (end view).

Fig. 4 is electrical isolation disconnecting link one a cam part lateral plan described in the utility model.

Fig. 5 is electrical isolation disconnecting link bus-tie circuit breaker described in the utility model and front cabinet door mechanical interlocks structural representation.

Fig. 6, be ground junction box structure described in the utility model assembling schematic diagram (front view).

Fig. 7 is an earth connection box structure assembling schematic diagram (vertical view) described in the utility model.

As shown in drawings, cabinet described in the utility model, be on a metal enclosed box switch cubicle, bus casing (1), bus isolation switch (2), mirror surface (3), terminal chamber (4), illuminating lamp (5), oil switch (6), earth connection box (7), support insulator (8), circuit and bypass isolation switch (9), operating mechanism (10), mechanical interlock mechanism (11), current transformer (12), operating mechanism (13), cable end (14) are housed; Architectural feature of the present utility model is:

The second, in cabinet, be equiped with cam pressing plate interlinked mechanism on the moving contact plug-in strip body parallel blade (D5) of electrical isolation disconnecting link (2,9), to increase the contact pressure between sound contact (D5, D7);

---described cam is installed between plug-in strip middle part two parallel blades (D5), it is made up of wheel disc (D2) and push rod (D3), radially have groove (D8) on wheel disc (D2) surface, a side (D9) of this groove tilts to intersect with the bottom surface, and the push rod (D3) of band sliding contact is housed in groove (D8);

---described pressing plate (D4) divides two groups to pass through bolt (D6) cross-under at blade (D5) two ends outside parallel blade (D5), the end of pressing plate is relative in twos, and being overlapped on the top of described push rod (D3), the front end of pressing plate (D4) is the two ends that pincer is clamped in parallel blade.On the bolt (D6) between blade (D5) and the pressing plate (D4), spring (D10) can be housed also.

By means of the rotation of cam wheel disc (D2), push rod (D3) slides along the inclined-plane (D9) of groove (D8), and during combined floodgate, pressing plate (D4) is terminal, and its front end just applies a clamping force to plug-in strip blade (D5) by jack-up, thereby realizes the reliable contact of dynamic/static contact; When disjunction was operated a switch, push rod was return, and pressing plate (D4) end loosens, and the chucking power of pressing plate (D4) front end on blade (D5) is disengaged, and its dynamic/static contact is separated smoothly.Spring (10) can be used for " cleaning certainly " extinguishing arc between contact.

Second, be provided with mechanical interlock mechanism (11) between electrical isolation disconnecting link switch (2) and the front cabinet door, it by and the hinged connecting rod (S2) of switch dead bolt (S1) and wheel disc (S4) with and the drive link (S5) that is connected of front cabinet door door lock (S7) between the structure that cooperatively interacts by means of key (S9) and groove (S8), realize the interlocking between switch isolation switch and the cabinet door.As shown in Figure 4, when bus isolation switch (2) closes a floodgate, operating handle (S1) drives dead bolt (S2) and connecting rod (S3) makes wheel disc (S4) rotate, at this moment the key (S9) on the drive link (S5) can not rotate drive link (S5) owing to being blocked by wheel disc (S4), thereby also just can not drive locking head connecting rod (S6) and door lock (S7) is opened the Qianmen; Otherwise, when open at the Qianmen, bus isolation switch (2) should separate, door lock (S7) drives locking head connecting rod (S6) and drives drive link (S5) rotation, at this moment, the key (S9) on the drive link (S5) just changes the keyway (S8) that advances on the wheel disc (S4), and wheel disc (S4) can not be rotated, thereby restriction operating handle (S1) operation so just guarantees can not close the bus disconnecting link in the Qianmen open mode.

The 3rd, on cabinet inwall, be equiped with earth connection box (7) in the cabinet near the other side of door of switch cabinet, one end of earth connection is fixed in box (7) inwall, go up an end of close cabinet doorframe (H4) at lid (H1), horizontal backing pin (H2) is housed, and the gap (H3) on it and the cabinet doorframe (H4) is complementary.When lid (H1) was closed, backing pin (H2) was in same horizontal plane with mouthful (H3), and the cabinet door just may close and close; Earth connection is in the state of articulating in cabinet, and lid (H1) can not be closed, and the shelves pin can not pass through gap (H3), and the cabinet door also can't close and close, thereby prevents to close isolation switch in the hanging earthing conductor mistiming.

Advantage of the present utility model is: in breaking and closing, the open and close of cabinet door and the clamping and remove between three kinds of operations of earth connection of isolation switch, realize restriction and interlocking, thereby can prevent the misoperation fault in equipment operation and the maintenance process effectively; The cam pressing plate clamp system of switch isolation switch contact makes switch deciliter rapid operation, safety, reliable; And because of the contact contact area diminishes, thereby can reduce whole knife switch size, save space in the cabinet, finally switch cabinet body can be made small volume and less weight.

With the exception of this, the utility model also can be preceding inboard to the doorstep in cabinet, the combined floodgate display unit that is made of mirror surface (3) and illuminating lamp (5) is installed, makes that the operator can be by the clear deciliter state of seeing the bus isolation switch of observation window outside cabinet when operation.

Claims

1, a kind of cabinet is in the cabinet of a metal enclosed structure, is separated into bus-bar room, instrument transformer and breaker chamber with the metal partion (metp) of ground connection, and adopts the insulating wall sleeve to support as bus, it is characterized in that:

I, in cabinet installing cam pressing plate interlinked mechanism on the moving contact blade of electrical isolation disconnecting link:

-described cam is installed between two parallel blades of plug-in strip middle part, and it is made up of wheel disc and push rod, radially has groove in sheave surface, and it is crossing that side of this groove and bottom surface tilt, and the push rod of being with sliding contact is housed in groove;

-described pressing plate divides two groups to pass through the bolt cross-under at the blade two ends outside parallel blade, and the end of pressing plate is relative in twos, and is overlapped on the top of described push rod, and the front end of pressing plate is the two ends that pincer is clamped in parallel blade;

II, between electrical isolation disconnecting link switch and front cabinet door, be provided with mechanical interlock mechanism, it by and the hinged connecting rod of switch dead bolt and wheel disc with and the drive link of the phase-locked binding of cabinet every between the structure that cooperatively interacts by key and groove realize interlocking between switch isolation switch and the cabinet door;

III, be equiped with earth connection box in the cabinet on the cabinet inwall of the other side near door of switch cabinet, an end of earth connection is fixed on the box inwall, near an end of cabinet doorframe level shelves pin is housed at lid, and the gap on it and the cabinet doorframe mates mutually.

2, cabinet according to claim 1 is characterized in that preceding inboard to the doorstep in cabinet, and the combined floodgate display unit that is made of speculum and illuminating lamp also is housed.