CN112951682B - An integrated combination device of a circuit breaker isolating switch - Google Patents

Abstract

The application provides an integrated combination device of a circuit breaker disconnector, including a first isolation mechanism, a first connecting rod, a second connecting rod, a second isolation mechanism, an operating connecting rod, an actuator, a conductive connecting rod, a moving contact One end of the first connecting rod is connected with the first isolation mechanism, and the other end is connected with the second connecting rod; the first connecting rod is connected with the second connecting rod via the second connecting rod. The isolation mechanism is connected; one end of the operating connecting rod is connected to the second connecting rod, and the other end is connected to the actuator; one end of the conductive connecting rod is connected to the second connecting rod, and the other end is connected to the moving contact; one end of the static contact fixing rod is fixed to the switch cabinet, The other end is connected with the static contact; the metal scribe is vertically fixed on the static contact fixing rod. In this application, the isolating switch and the circuit breaker are designed as an integrated component, which simplifies the structure, reduces the cost and improves the reliability of the system operation.

Description

An integrated combination device of a circuit breaker isolating switch

technical field

The present application relates to the technical field of electrical switchgear devices, in particular to an integrated combination device of a circuit breaker isolating switch.

Background technique

High-voltage switchgear mainly plays the role of control, protection and safety isolation in power grid control, and also plays the role of carrying rated current in power transmission. The safety and stability of high-voltage switchgear will directly affect the safe operation and reliable power supply of the entire power grid. Among them, the switchgear is one of the most important high-voltage switchgears in the distribution network, which is widely used in the power system.

Circuit breakers and isolating switches are important components in the design of substation switchgear, and they are usually used independently to perform different functions. A circuit breaker is a mechanical switching device that can close, carry and break current under normal circuit conditions, and can carry and break current under abnormal circuit conditions within a specified time. When the isolating switch is in the divided position, there is an insulation distance between the contacts that meets the specified requirements and an obvious disconnection mark; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions within a specified time. equipment.

The switchgear of the traditional separate circuit breaker and isolating switch has poor stability during operation, which directly affects the operation stability of the substation. And it is difficult to synchronize actions, resulting in a larger space occupation.

Contents of the invention

The application provides an integrated combination device of a circuit breaker isolating switch to solve the problems that the circuit breaker and the isolating switch in the traditional switchgear are difficult to operate synchronously during operation, resulting in increased space occupation and insufficient operational stability.

The present application provides an integrated combination device of a circuit breaker isolating switch, including a first isolating mechanism, a first connecting rod, a second connecting rod, a second isolating mechanism, an operating connecting rod, an actuator, a conductive connecting rod, a moving contact Head, static contact, static contact fixing rod and metal scribe;

One end of the first connecting rod is connected to the first isolation mechanism, and the other end is connected to the second connecting rod; the first connecting rod is connected to the second isolation mechanism via the second connecting rod; the One end of the operating connecting rod is connected to the second connecting rod, and the other end is connected to the actuator; one end of the conductive connecting rod is connected to the second connecting rod, and the other end is connected to the moving contact; the static contact One end of the fixing rod is fixed on the switch cabinet, and the other end is connected to the static contact; the metal scribe is vertically fixed on the fixing rod of the static contact.

Optionally, the first connecting rod is provided with a sliding groove, the metal scribe is inserted into the sliding groove, and the metal scribe is smoothly connected with the first connecting rod.

Optionally, an insulating connection part is further included, and the first connecting rod is connected to the second connecting rod through the insulating connecting part.

Optionally, the first isolation mechanism includes a first isolation knife, a first conductive rod and a first insulator, the first isolation knife is fixedly connected to the first insulator; one end of the first conductive rod is connected to The first isolation knife is smoothly connected, and the other end is connected with the first connecting rod.

Optionally, the second isolation mechanism includes a second isolation knife, a second conductive rod and a second insulator, the second isolation knife is fixedly connected to the second insulator; one end of the second conductive rod is connected to The second isolation knife is smoothly connected, and the other end is connected with the second connecting rod.

Optionally, the actuator includes a hinge, and the actuator is connected to the operating link through the hinge.

It can be seen from the above technical solutions that this application provides an integrated combination device for a circuit breaker disconnector, including a first isolation mechanism, a first link, a second link, a second isolation mechanism, an operating link, an actuator, Conductive connecting rod, moving contact, static contact, static contact fixing rod and metal scribe; one end of the first connecting rod is connected with the first isolation mechanism, and the other end is connected with the second connecting rod; the The first connecting rod is connected to the second isolation mechanism via the second connecting rod; one end of the operating connecting rod is connected to the second connecting rod, and the other end is connected to the actuator; one end of the conductive connecting rod Connect the second connecting rod, and the other end is connected to the moving contact; one end of the static contact fixing rod is fixed on the switch cabinet, and the other end is connected to the static contact; the metal scribe is vertically fixed on the The static contact is fixed on the rod. In this application, the isolating switch and the circuit breaker are designed as an integrated component, which simplifies the structure, reduces the cost and improves the reliability of the system operation. It can effectively overcome the problems that the circuit breaker and the isolating switch in the traditional switchgear are difficult to operate synchronously during operation, resulting in larger space occupation and insufficient operational stability. It is suitable for switch cabinets under various voltage levels, especially suitable for switch cabinet installations in places with poor environmental conditions and small spaces.

Description of drawings

In order to illustrate the technical solution of the present application more clearly, the accompanying drawings that need to be used in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, on the premise of not paying creative work, there are also Additional figures can be derived from these figures.

Fig. 1 is the structural schematic diagram that both circuit breaker and isolating switch are closed in the present application;

Fig. 2 is the schematic structural diagram of circuit breaker breaking and isolating switch closing in the present application;

Fig. 3 is a schematic diagram of the structure in which both the circuit breaker and the isolating switch are turned off in the present application.

Detailed ways

The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.

An integrated combination device for a circuit breaker isolating switch provided by the application includes a first isolating mechanism 1, a first connecting rod 2, a second connecting rod 3, a second isolating mechanism 4, an operating connecting rod 5, an actuator 6, Conductive connecting rod 7, moving contact 8, static contact 9, static contact fixing rod 10 and metal scribe 15; one end of the first connecting rod 2 is connected to the first isolation mechanism 1, and the other end is connected to the The second connecting rod 3; the first connecting rod 2 is connected with the second isolation mechanism 4 via the second connecting rod 3; one end of the operating connecting rod 5 is connected with the second connecting rod 3, and the other end It is connected with the actuator 6; one end of the conductive connecting rod 7 is connected to the second connecting rod 3, and the other end is connected to the moving contact 8; one end of the static contact fixing rod 10 is fixed in the switch cabinet, and the other end is It is connected with the static contact 9; the metal scribe 15 is vertically fixed on the fixed pole 10 of the static contact. Wherein, the actuator 6 includes a hinge portion, the actuator 6 is connected to the operation link 5 through the hinge, and the operation link 5 drives the first link 2 and the second link 3 to perform corresponding actions.

Further, the first isolation mechanism 1 includes a first isolation knife 11, a first conductive rod 12 and a first insulator 13, and the first isolation knife 11 is fixedly connected to the first insulator 13; One end of a conductive rod 12 is smoothly connected to the first isolation switch blade 11 , and the other end is connected to the first connecting rod 2 . The second isolation mechanism 4 includes a second isolation knife 41, a second conductive rod 42 and a second insulator 43, and the second isolation knife 41 is fixedly connected to the second insulator 43; the second conductive rod One end of 42 is smoothly connected with the second isolation knife 41 , and the other end is connected with the second connecting rod 3 .

The integrated combination device provided by this application cleverly combines the circuit breaker and the disconnector, and the actions of the two are continuous, which effectively saves the occupancy of the plane space. The specific working process is as follows: Refer to FIG. 1 , which is a schematic structural diagram of an integrated combination device of a circuit breaker isolating switch, wherein both the circuit breaker and the isolating switch are in a closed state. The action starts from the state that the moving contact 8 and the static contact 9 are closed. The action of the actuator 6 drives the second connecting rod 3 and the first connecting rod 2 fixedly connected with the operating connecting rod 5 to move downward. Because the static contact fixing rod 10 and the static contact 9 are fixed, the moving contact 8 is driven to move downward, and the moving and static contacts are separated to complete the disconnection of the circuit. At this time, referring to Fig. 2, it is a schematic structural diagram of the breaking of the circuit breaker and the closing of the isolating switch in the present application. switch is in the closed state), the actuator 6 continues to drive the second connecting rod 3 and the first connecting rod 2 to move downward until the first conductive rod 12 breaks away from the first isolating knife 11 to complete the disconnection of the isolating switch. Similarly, the second conductive rod 42 is separated from the second isolation knife 41 . So far, referring to Figure 3, the whole process is over. The integrated combination device of the present application completes the successive and reliable actions of the circuit breaker and the isolating switch. The reverse is also true when closing the loop. The actuator 6 drives the second connecting rod 3 and the first connecting rod 2 connected to the operating connecting rod 5 to move upward, the first conductive rod 12 contacts the first isolation switch blade 11 and the second conductive rod 42 contacts the second isolation switch blade 41 (closing of the isolating switch is completed), then the actuator 6 continues to act, and finally the moving contact 8 and the static contact 9 are connected (the circuit breaker is closed), and the connection of the circuit is completed.

Further, the first connecting rod 2 is provided with a chute, the metal scribe 15 is inserted into the chute, and slides in the chute, and the metal scribe 15 is smooth with the first connecting rod 2 connect. The first connecting rod 2 and the second connecting rod 3 are provided with an insulating connection part 14, and the first connecting rod 2 is connected to the second connecting rod 3 through the insulating connecting part 14, so as to ensure that the first connecting rod 2 and the second connecting rod The inside of the two connecting rods 3 is not conducting, so that the current only flows into the contacts from the metal scribe 15 .

Further, the first insulator 13 protects the busbar, the busbar is connected to the first isolation switch 11, the current flows from the busbar to the first isolation switch 11, and enters the first connecting rod through the connected upper first conductive rod 12 2. Complete the breaking action of the circuit at the moving and static contacts through the metal scribing piece 15. Then flow into the lower second conductive rod 42 through the conductive connecting rod 7 , and finally flow into the cable connected to it from the second isolation switch blade 41 .

Further, S1 in the figure represents the length of the first isolation knife 11 from the farthest end of the first conductive rod 12 and the length of the second isolation knife 41 from the farthest end of the second conductive rod 42 when the moving and static contacts are closed, That is, the disconnection distance of the isolating switch in the traditional sense; D1 in the figure indicates the distance between the moving and static contacts after the circuit breaker is safely disconnected. In order to achieve opening, the circuit breaker will act first; when closing, the circuit breaker will act later. It is necessary to ensure that S1>D1 in actual production and installation.

The present application provides an integrated combination device of a circuit breaker isolating switch, including a first isolating mechanism, a first connecting rod, a second connecting rod, a second isolating mechanism, an operating connecting rod, an actuator, a conductive connecting rod, a moving contact One end of the first connecting rod is connected with the first isolation mechanism, and the other end is connected with the second connecting rod; the first connecting rod passes through the The second connecting rod is connected to the second isolation mechanism; one end of the operating connecting rod is connected to the second connecting rod, and the other end is connected to the actuator; one end of the conductive connecting rod is connected to the second connecting rod Rod, the other end of which is connected to the moving contact; one end of the static contact fixing rod is fixed on the switch cabinet, and the other end is connected to the static contact; the metal scribe is vertically fixed on the static contact fixing rod . In this application, the isolating switch and the circuit breaker are designed as an integrated component, which simplifies the structure, reduces the cost and improves the reliability of the system operation. It can effectively overcome the problems that the circuit breaker and the isolating switch in the traditional switchgear are difficult to operate synchronously during operation, resulting in larger space occupation and insufficient operational stability. It is suitable for switch cabinets under various voltage levels, especially suitable for switch cabinet installations in places with poor environmental conditions and small spaces.

The similar parts between the embodiments provided in the present application can be referred to each other, and the specific implementations provided above are only a few examples under the general concept of the present application, and do not constitute a limitation of the protection scope of the present application. For those skilled in the art, any other implementations expanded based on the proposal of the present application without creative work shall fall within the scope of protection of the present application.

Claims (2)

1. The integrated combination device of the breaker isolating switch is characterized by comprising a first isolating mechanism (1), a first connecting rod (2), a second connecting rod (3), a second isolating mechanism (4), an operating connecting rod (5), an actuating mechanism (6), a conductive connecting rod (7), a moving contact (8), a fixed contact (9), a fixed contact fixing rod (10) and a metal scribing (15);

one end of the first connecting rod (2) is connected with the first isolation mechanism (1), and the other end of the first connecting rod is connected with the second connecting rod (3); the first connecting rod (2) is connected with the second isolation mechanism (4) through the second connecting rod (3); one end of the operation connecting rod (5) is connected with the second connecting rod (3), and the other end of the operation connecting rod is connected with the executing mechanism (6); one end of the conductive connecting rod (7) is connected with the second connecting rod (3), and the other end of the conductive connecting rod is connected with the moving contact (8); one end of the fixed contact fixing rod (10) is fixed on the switch cabinet, and the other end of the fixed contact fixing rod is connected with the fixed contact (9); the metal scribing (15) is vertically fixed on the fixed contact fixing rod (10);

the first isolation mechanism (1) comprises a first isolation switch blade (11), a first conducting rod (12) and a first insulator (13), and the first isolation switch blade (11) is fixedly connected with the first insulator (13); one end of the first conducting rod (12) is connected with the first isolation switch blade (11) in a smooth manner, and the other end of the first conducting rod is connected with the first connecting rod (2);

the second isolation mechanism (4) comprises a second isolation switch blade (41), a second conducting rod (42) and a second insulator (43), and the second isolation switch blade (41) is fixedly connected with the second insulator (43); one end of the second conducting rod (42) is connected with the second isolating switch blade (41) in a smooth manner, and the other end of the second conducting rod is connected with the second connecting rod (3);

a chute is arranged on the first connecting rod (2), the metal scribing piece (15) is inserted into the chute, and the metal scribing piece (15) is in smooth connection with the first connecting rod (2);

the device also comprises an insulating connecting part (14), wherein the first connecting rod (2) is connected with the second connecting rod (3) through the insulating connecting part (14).

2. An integrated combination of disconnectors for circuit breakers according to claim 1, characterized in that the actuator (6) comprises a hinge, through which the actuator (6) is connected to the operating link (5).

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