CN201210454Y - Intelligent dual-power switching device - Google Patents

Abstract

The utility model discloses an intelligent duplicate supply fling-cut switch device, comprising an isolating switch, a main breaker being connected with a main power supply electrically and an assistant breaker being connected with an assistant power supply electrically; the isolating switch comprises a main post head, an assistant post head, a wire out lead and an isolating knife being connected with the wire out lead electrically; the wire out lead of the main breaker is connected with the main post head of the isolating switch, the wire out lead of assistant breaker being connected with the assistant post head of the isolating switch. The utility model has advantages of high work reliability and great safety.

Description

Intelligent dual power switching device

technical field

The utility model belongs to the technical field of high-voltage electric switches, and in particular relates to an intelligent dual-power switching device.

Background technique

In the power network, there are many users who have high requirements on the reliability of power supply, such as coal mines, textile mills and oil refineries. Once a power outage occurs in these units, it will bring significant economic losses or even casualties to the unit. Therefore, in these In the power supply system of the unit, it is necessary to have the main power supply and the backup power supply. When the main power supply fails, the backup power supply must be put into power immediately to restore the power supply. Switch manually or automatically.

The traditional dual power switching mechanism uses two high-voltage switch cabinets plus a set of extremely complex electrical interlocking devices to prevent parallel operation of the two circuits. This double power supply device has following three big defects: (1) locking is unreliable: at present, the electrical interlocking reliability is too low, is strictly forbidden to use, and the country of mechanical interlocking device has no uniform design specification standard again, can only be designed and transformed by each locality. (2) The operation is complicated, and it is easy to jam, causing electric accidents; (3) The investment is large, and two switch cabinets need to be purchased, and then the locking device is designed, and then refitted to the switch cabinet.

At present, the domestic dual power supply switching mechanism generally uses two circuit breakers, and connects the incoming line terminals of each circuit breaker to a power supply, and then connects the outgoing line terminals of the two circuit breakers in parallel, and realizes this through an electrical interlocking device. Switch between main power and backup power. The disadvantage of this dual power switching mechanism is poor reliability and may lead to serious accidents; for example, when the main power supply circuit is powered off for routine maintenance, the coil in the circuit breaker connected to the main power may be burned out, However, the circuit in the circuit breaker remains on, at this time, the other circuit breaker in the dual power switching mechanism will immediately connect to the backup power supply to continue power supply, which will cause the main power supply circuit that should have been powered off. It is also charged, which can easily cause electric shock accidents for maintenance personnel who overhaul the main power circuit. In addition, due to the need to purchase two circuit breakers, the investment is relatively large.

Utility model content

The purpose of the utility model is to provide an intelligent dual power switching switch device with good working reliability and safety.

The technical solution for realizing the purpose of this utility model is: an intelligent dual power supply switching device, including an isolating switch, and the isolating switch includes a main terminal, an auxiliary terminal, an outlet column, and an isolation knife electrically connected to the outlet column; Its structural feature is that it also includes a main circuit breaker for electrical connection with the main power supply and an auxiliary circuit breaker for electrical connection with the backup power supply, the outlet post of the main circuit breaker is electrically connected with the main terminal post of the isolating switch, so The outlet post of the auxiliary circuit breaker is electrically connected with the auxiliary terminal post of the isolating switch.

In the above technical solution, the main circuit breaker and the auxiliary circuit breaker are preferably vacuum circuit breakers.

In the above technical solution, the basic shape of the isolation knife is V-shaped.

In the above technical solution, the isolating knife of the isolating switch has two stations connected with the main terminal and connected with the auxiliary terminal, or the isolating knife of the isolating switch has two stations connected with the auxiliary terminal and connected with the auxiliary terminal. The binding post is connected and stays in the three stations in the center of the main binding post and the auxiliary binding post.

In the above technical solution, the isolating switch further has a rotating shaft, an insulating pull rod connecting the rotating shaft and the isolating knife, and a driving mechanism for driving the rotating shaft to rotate.

In the above technical solution, the drive mechanism is a manual drive mechanism, an electric drive mechanism, or a combination of the two (that is, both a manual drive mechanism and an electric drive mechanism).

In the above technical solution, the device also includes a metal shell; the incoming line column of the main vacuum circuit breaker, the incoming line column of the auxiliary vacuum circuit breaker and the outgoing line column of the disconnector are exposed from the housing, and the main body of the isolation switch, the main vacuum circuit breaker Both the main body of the circuit breaker and the main body of the auxiliary vacuum circuit breaker are arranged in the casing.

In the above technical solution, a metal door is provided on the left and right sides of the housing, slide rails are provided on the bottom of the housing along the left and right directions, and the lower parts of the main vacuum circuit breaker and the auxiliary vacuum circuit breaker are equipped with pulley.

The utility model has positive effects as follows: (1) The utility model adopts a method of matching a disconnector and two circuit breakers, and effectively improves The working reliability and safety performance of the dual power switching device are guaranteed. (2) The utility model can adopt automatic control, and can also be equipped with a handle to make its working performance stable and easy to overhaul. (3) By installing the main part of the utility model in the metal shell, only the incoming line column of the main vacuum circuit breaker, the incoming line column of the auxiliary vacuum circuit breaker and the outgoing line column of the isolation switch are exposed from the housing, so that the utility model The new type has become a "armoured intelligent dual power switching device", which can prevent the internal main structure from being damaged during transportation and installation, improve the integration performance of the equipment, facilitate transportation and installation, and can be installed outdoors and indoors. Inside, and has anti-theft function. (4) A metal door is provided on the left and right sides of the housing of the utility model, and slide rails are provided at the bottom of the housing along the left and right directions, and the lower parts of the main vacuum circuit breaker and the auxiliary vacuum circuit breaker are provided with sliding rails. The matching pulley makes the utility model a "armoured mobile intelligent dual power switch device". When a circuit breaker needs to be overhauled, it can be directly pulled out from the housing, which is fast and convenient.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a structural schematic diagram of the intelligent dual power switching switch device shown in Fig. 1 when it is connected to the main power supply;

Fig. 3 is a schematic diagram of the structure of the intelligent dual power switching device shown in Fig. 1 when it is connected to the main power supply;

Fig. 4 is a working principle diagram of the intelligent dual power switching device shown in Fig. 1;

Fig. 5 is a schematic diagram of the second structure of the present invention.

The reference signs are: isolating switch 1, main terminal 11, auxiliary terminal 12, outlet terminal 13, isolation knife 14, rotating shaft 15, insulating pull rod 16, main circuit breaker 2, main vacuum circuit breaker main body 20, outlet terminal 21, Incoming line post 22, auxiliary circuit breaker 3, main body of auxiliary vacuum circuit breaker 30, outgoing line post 31, incoming line post 32, casing 4, metal door 41, slide rail 42, pulley 5.

Detailed ways

(Example 1)

Figures 1 to 4 show a specific embodiment of the utility model, wherein Figure 1 is a schematic structural view of the utility model; Figure 2 is the intelligent dual power switching device shown in Figure 1 when it is connected to the main power supply state; Fig. 3 is a schematic diagram of the structure of the intelligent dual power switching device shown in Fig. 1 when it is connected to the main power; Fig. 4 is a working principle diagram of the intelligent dual power switching device shown in Fig. 1 .

This embodiment is an intelligent dual-power switching device, as shown in Figure 1, which includes a disconnector 1, a main circuit breaker 2 for electrical connection with the main power supply, and a secondary circuit breaker 3 for electrical connection with the backup power supply; The isolating switch 1 includes a main terminal 11, an auxiliary terminal 12, an outgoing terminal 13, an isolating knife 14 electrically connected to the outgoing terminal 13, a rotating shaft 15, an insulating pull rod 16 connecting the rotating shaft 15 and the isolating knife 14, and driving the rotating shaft 15 to rotate The driving mechanism; the outgoing post 21 of the main circuit breaker 2 is electrically connected to the main terminal 11 of the disconnector 1, and the outgoing post 31 of the secondary circuit breaker 3 is electrically connected to the secondary post 12 of the disconnector 1.

The main circuit breaker 2 and the auxiliary circuit breaker 3 described in this embodiment are both high-voltage vacuum circuit breakers. In practice, it is also feasible to use other forms of circuit breakers, such as sulfur hexafluoride circuit breakers, but these all belong to this practical application. The scope of protection claimed by the new model.

In this embodiment, the basic shape of the isolating knife 14 is V-shaped. The isolating knife 14 of the isolating switch 1 has the functions of connecting with the secondary terminal 12, connecting with the secondary terminal 12, and staying in the main terminal 11. And the three stations in the center of the auxiliary terminal 12, that is to say the isolating switch in this embodiment is a three-position isolating switch. In practice, it is also feasible to adopt a single-pole double-station isolating switch with only two stations connected to the main terminal 11 and the auxiliary terminal 12. Of course, these all belong to the protection required by the present utility model range.

The driving mechanism in this embodiment is an electric driving mechanism (not shown on the figure) plus a manual handle. In practice, one of the manual driving mechanism or the electric driving mechanism can also be selected. Of course, when there is only a manual driving mechanism , its operation is relatively loaded down with trivial details, but is also feasible, and these all belong to the scope of protection required by the utility model.

Figures 2 to 4 show the working principle of this embodiment. When the main power supply is normally powered, the V-shaped isolation knife 14 is electrically connected to the main terminal 11. When the main power fails and the backup power needs to be started, the auxiliary vacuum circuit breaker 3 The dynamic and static contacts (not shown in the figure) keep disconnected first, and now the driving mechanism drives the rotating shaft 15, and the rotating shaft 15 drives the V-shaped isolation knife 14 through the insulating pull rod 16, so that the isolation knife 14 is disconnected from the main terminal 11, And connected with the auxiliary terminal 12; then the dynamic and static contacts in the auxiliary vacuum circuit breaker 3 are in contact with each other, and are in a state of passage. At this time, the auxiliary power supply supplies power.

This embodiment has the following advantages:

(1) This embodiment adopts the method of cooperating with one isolating switch and two circuit breakers. By controlling the on and off of the isolating knife of the isolating switch and the main terminal and the auxiliary terminal, the safety of the dual power supply switching device is effectively improved. Work reliability and safety performance. (2) In this embodiment, automatic control can be adopted, and a handle can also be installed to make its working performance stable and easy to overhaul.

(Example 2)

Fig. 5 is a schematic diagram of the second structure of the utility model, showing a second specific implementation manner of the utility model.

This embodiment is basically the same as Embodiment 1, except that the device also includes a metal casing 4; the incoming line column 22 of the main vacuum circuit breaker 2, the incoming line column 32 of the auxiliary vacuum circuit breaker 3 and the disconnector 1 The outlet post 13 of the housing is exposed, and the isolating switch main body 10 , the main vacuum circuit breaker main body 20 and the auxiliary vacuum circuit breaker main body 30 are all arranged in the casing 4 . The left and right sides of the housing 4 are respectively provided with a metal door 41, the bottom of the housing 4 is provided with slide rails 42 along the left and right directions, and the lower parts of the main vacuum circuit breaker 2 and the auxiliary vacuum circuit breaker 3 are provided with slide rails 42 Matching pulley 5.

This embodiment has the following advantages: (1) By installing the main part of this embodiment in a metal housing, only the incoming line column of the main vacuum circuit breaker, the incoming line column of the auxiliary vacuum circuit breaker, and the outgoing line column of the disconnector The shell is exposed, so that this embodiment becomes an "armoured intelligent dual-power switching device", which can avoid the internal main structure from being damaged during transportation and installation, improve the integration performance of the equipment, and facilitate transportation and installation , Can be installed outdoors and indoors, and has anti-theft function. (2) By setting a metal door on the left and right sides of the housing in this embodiment, and setting slide rails along the left and right directions at the bottom of the housing, the lower parts of the main vacuum circuit breaker and the auxiliary vacuum circuit breaker are provided with the slide rails. Cooperating pulleys make this embodiment a "armored mobile intelligent dual power switching device". When a certain circuit breaker needs to be overhauled, it can be directly pulled out from the housing, which is fast and convenient.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And these obvious changes or variations derived from the spirit of the present utility model are still within the protection scope of the present utility model.

Claims (8)

1, a kind of intelligent dual-power switching device comprises isolating switch (1), and described isolating switch (1) comprises main terminal (11), secondary binding post (12), outlet column (13) and the isolation knife (14) that is electrically connected with outlet column (13); It is characterized in that: also comprise the secondary circuit breaker (3) that is used for the main circuit breaker (2) that is electrically connected with main power source and is used for being electrically connected with stand-by power supply, the outlet column (21) of described main circuit breaker (2) is electrically connected with the main terminal (11) of isolating switch (1), and the outlet column (31) of described secondary circuit breaker (3) is electrically connected with the secondary binding post (12) of isolating switch (1).

2, intelligent dual-power switching device according to claim 1 is characterized in that: described main circuit breaker (2) and secondary circuit breaker (3) all are vacuum circuit-breakers.

3, intelligent dual-power switching device according to claim 1 is characterized in that: the basic configuration of described isolation knife (14) is a V-arrangement.

4, intelligent dual-power switching device according to claim 3, it is characterized in that: the isolation knife (14) of described isolating switch (1) has two stations connecting with main terminal (11) and connect with secondary binding post (12), or the isolation knife (14) of described isolating switch (1) has with secondary binding post (12) and connects, connects and rest on three stations of main terminal (11) and secondary binding post (12) center with secondary binding post (12).

5, intelligent dual-power switching device according to claim 3 is characterized in that: described isolating switch (1) also has rotating shaft (15), connects rotating shaft (15) and the insulated tension pole (16) of isolation knife (14) and the driving mechanism of driving rotating shaft (15) rotation.

6, intelligent dual-power automatic switching switching device according to claim 5 is characterized in that: described driving mechanism is manual actuation mechanism, electric driving mechanism or the combination of the two.

7, according to the described intelligent dual-power switching device of one of claim 1 to 6, it is characterized in that: this device also comprises metal shell (4); The inlet wire post (32) of the inlet wire post (22) of described main vacuum circuit-breaker (2), secondary vacuum circuit-breaker (3) and the outlet column (13) of isolating switch (1) are exposed housing, and described isolating switch main body (10), main vacuum circuit breaker main (20) and secondary vacuum circuit breaker main (30) all are arranged in the shell (4).

8, intelligent dual-power switching device according to claim 7, it is characterized in that: described housing (4) each side is provided with a metallic door (41), housing (4) bottom is provided with slide rail (42) along left and right directions, and described main vacuum circuit-breaker (2) and secondary vacuum circuit-breaker (3) bottom are equipped with the pulley (5) that matches with slide rail (42).

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