Combined electric appliance

Abstract

The utility model relates to a combined electric appliance, which comprises an insulator provided with a conductive seat and an insulating cylinder provided with a vacuum arc-extinguishing chamber, an isolating knife is arranged on a static contact of the vacuum arc-extinguishing chamber, and the insulating cylinder can drive the vacuum arc-extinguishing chamber to rotate so as to drive the isolating knife to be separated from or combined with the conductive seat, so that an obvious fracture can be formed. Through the structure, an insulator for driving the isolation knife to move is prevented from being independently arranged in the combined electric appliance, so that the mechanism is compact, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to a combined electrical appliance, in particular to a vacuum circuit breaker isolating switch. Background Art

[0002] The traditional isolating switch consists of a vacuum interrupter and an isolating knife. When disconnecting the circuit, in addition to separating the moving contact and the static contact of the vacuum interrupter, it is also necessary to disconnect the isolating knife from the conductive seat, so that the operation and maintenance personnel can confirm whether the power is on or off during work and maintenance, and effectively solve the inherent deficiency of the vacuum interrupter without an obvious isolating fracture.

[0003] However, the vacuum interrupter chamber of the existing isolating switch, such as the Chinese utility model patent with publication number CN 220121732 U, is fixed, and an insulator that supports and drives the isolating knife to move is separately provided in the combined electrical appliance to drive the isolating knife to separate from or combine with the conductive seat, resulting in a complex and bloated structure of the combined electrical appliance. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, a combination electrical appliance with a simple structure and obvious ports is provided. The technical solution adopted by the utility model is:

[0005] A combined electrical apparatus, comprising a base, an insulator for mounting a conductive seat is arranged on the base, an insulating cylinder capable of rotating around its own axis is also arranged on the base, a vacuum interrupter capable of rotating with the insulating cylinder is arranged on the insulating cylinder; a mounting frame is arranged on the top of the insulating cylinder, the vacuum interrupter is mounted on the mounting frame in a manner that its axis is perpendicular to the axis of the insulating cylinder, and a turntable for mounting the insulating cylinder so that it can rotate is arranged on the base;

[0006] An isolating knife is fixed on the static contact of the vacuum interrupter, and the isolating knife can be separated from or combined with the conductive seat when the vacuum interrupter rotates;

[0007] An electromagnetic pull rod mechanism for driving the vacuum interrupter to switch on and off is also arranged in the insulating cylinder.

[0008] Furthermore, the electromagnetic pull rod mechanism includes an electromagnet, a suction disc, an insulating pull rod and a crank arm.

[0009] The electromagnet is fixed on a turntable, the insulating pull rod is movably arranged on the turntable along the axial direction, the suction disk is fixed to the first end of the insulating pull rod close to the electromagnet, the turning arm is L-shaped and its turning point is hinged on the mounting frame, the first end of the turning arm is connected to the moving contact of the vacuum arc extinguishing chamber, and the second end of the turning arm is connected to the second end of the insulating pull rod. A disconnecting spring is arranged between the electromagnet and the suction disk, and a pressure spring capable of maintaining the combined pressure of the static contact and the moving contact is also arranged on the insulating pull rod; the insulating pull rod moves along its axial direction to drive the turning arm to swing and drive the moving contact to move along its axial direction.

[0010] A pair of vacuum arc extinguishing chambers are arranged on the mounting frame, and an isolating knife is installed on the static contact of each vacuum arc extinguishing chamber. A pair of insulators are arranged on the base, and a conductive seat matching with each isolating knife is installed on each insulator. A pair of crank arms whose second ends are connected to the second end of the insulating pull rod are hinged in the mounting frame, and the first end of each crank arm is respectively connected to the moving contact of each vacuum arc extinguishing chamber.

[0011] Furthermore, the turntable is driven to rotate by a motor. With this technical solution, since the vacuum interrupter can rotate with the insulating cylinder, the isolating knife is fixedly connected to the static contact, and the vacuum interrupter can drive the isolating knife to move when the vacuum interrupter rotates, thereby completing the separation or combination of the isolating knife and the conductive seat, avoiding the need to separately set an insulator in the combined electrical appliance to drive the isolating knife to move, making the structure compact and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the structure diagram of the combined electrical appliance;

[0013] Figure 2 It is a partial cross-sectional view of the vacuum interrupter and the electromagnetic pull rod mechanism;

[0014] Figure 3 It is a schematic diagram of the structure of a combined electrical appliance with two vacuum interrupter chambers;

[0015] Figure 4 It is a cross-sectional view of the electromagnetic pull rod mechanism of a combination electrical appliance with two vacuum interrupter chambers. DETAILED DESCRIPTION

[0016] The technical solution of the combined electrical appliance is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1The combined electrical apparatus shown includes a base 1, on which an insulator 3 and an insulating tube 4 are arranged, a conductive seat 2 connected to the incoming line is installed on the top of the insulator 3, a mounting frame 6 is installed on the top of the insulating tube 4, the mounting frame 6 and the insulating tube 4 are both insulating, a vacuum arc chamber 5 is fixed on the mounting frame 6, the vacuum arc chamber 5 is installed on the mounting frame 6 in a way that its axis and the axis of the insulating tube 4 are perpendicular to each other, and an isolating knife 8 that can cooperate with the conductive seat 2 is installed on the static contact 5-1 of the vacuum arc chamber 5.

[0018] In order to form a clear break of the isolating switch, the insulating cylinder 4 is mounted on the base 1 by rotation. Figure 2 As shown, a turntable 7 is arranged on the base 1, and the insulating cylinder 4 is fixed to the rotating part of the turntable 7. The turntable 7 drives the insulating cylinder 4 to rotate. When the insulating cylinder 4 rotates, it can rotate with the vacuum interrupter 5, so that the isolating knife 8 fixed on the static contact 5-1 is separated from the conductive seat 2 to form a clear fracture or combined with the conductive seat 2. The rotation of the turntable 7 is driven by the motor arranged on the turntable 7, and the rotation angle of the turntable 7 can be controlled by controlling the number of rotations of the motor, thereby controlling the distance between the isolating knife 8 and the conductive seat 2, so that the fracture is kept within a reasonable range. In addition, since the isolating knife 8 rotates at the same time as the vacuum interrupter 5, it is avoided to install an insulator that drives the isolating knife 8 to move in the combined electrical appliance, so that the structure is simplified and compact, and the cost is reduced. When the combined electrical appliance is powered off, in addition to separating the isolating knife from the conductive seat 2 to form a clear fracture, it is also necessary to separate the static contact 5-1 and the moving contact 5-2 of the vacuum interrupter 5 to further improve safety. In order to realize the on-off control of the vacuum interrupter 5, the combined electrical appliance is also provided with an electromagnetic pull rod mechanism. The insulating cylinder 4 is hollow, and the main components of the electromagnetic pull rod mechanism are arranged in the insulating cylinder 4. Figure 2 The electromagnetic pull rod mechanism shown includes an electromagnet 9, a suction disk 10, an insulating pull rod 11 and a crank arm 12, wherein the electromagnet 9 is fixed on the turntable 7 and can rotate with the turntable, the insulating pull rod 11 is axially movably installed on the turntable 7 and can also rotate with the turntable 7, the suction disk 10 is fixed to the first end 11a of the insulating pull rod 11 and is close to the electromagnet 9, the crank arm 12 is L-shaped and its inflection point 12c is hinged in the mounting frame 6, the first end 12a of the crank arm 12 is connected to the moving contact 5-2, and the second end 12b of the crank arm 12 is connected to the second end 11b of the insulating pull rod 11. When the insulating pull rod 11 moves along the axial direction, it can drive the crank arm 12 to rotate around the hinge, so that the first end 12a of the crank arm 12 drives the moving contact 5-2 of the vacuum arc chamber 5 to move, thereby realizing the on and off of the vacuum arc chamber 5 (that is, when the moving contact is in contact with the static contact, it is a passage, and when the moving contact is separated from the static contact, it is a circuit break). Figure 2 For example, the purpose of setting the crank arm 12 is to convert the vertical force of the insulating pull rod 11 into the horizontal direction to drive the movable contact 5-2 to move.

[0019] like Figure 2 In the embodiment shown, when the electromagnet 9 is powered on, the suction disc 10 moves to one side of the electromagnet 9 to push the insulating rod 11 upward, and the driving arm 12 rotates counterclockwise to push the moving contact 5-2 to keep in contact with the static contact 5-1 to form a path. In order to make the moving contact 5-2 and the static contact 5-1 in good contact, a pressure spring 14 is also provided on the insulating rod 11, and the pressure spring 14 continuously applies pressure to make the static contact 5-1 and the moving contact 5-2 fit more closely. When the electromagnet 9 is powered off, the opening spring 13 provided between the electromagnet 9 and the suction disc 10 drives the suction disc 10 to separate from the electromagnet 9, thereby driving the insulating rod 11 downward, and the crank arm 12 rotates clockwise to pull the moving contact 5-2 and the static contact 5-1 to separate to form a circuit break. Since the electromagnet 9 is powered by a wire, in order to prevent the wire contact from being broken when the electromagnet 9 rotates, the wire should have enough margin to cooperate with the rotation of the electromagnet 9.

[0020] During operation, when the power is cut off when the isolating knife 8 and the conductive seat 2 are combined, the vacuum interrupter 5 is first disconnected, and then the turntable 7 drives the insulating cylinder 4 to rotate to make the isolating knife 8 separate from the conductive seat to form a fracture, so as to reduce or eliminate the generation of arc.

[0021] Based on the above technical solution, two vacuum interrupters 5 can be arranged on the same insulating cylinder 4, and the two vacuum interrupters 5 can be driven to rotate by the insulating cylinder 4 to form an isolation break for the double-inlet disconnector. Figure 4 As shown in the figure, a pair of insulators 3 and an insulating cylinder 4 are arranged on the base 1, and the two insulators 3 are symmetrically arranged on both sides of the insulating cylinder 4. A conductive seat 2 is respectively arranged on each insulator 3 for connecting two incoming lines respectively. A mounting frame 6 is arranged on the insulating cylinder 4, and a pair of vacuum interrupters 5 are symmetrically arranged on the mounting frame 6. An isolating knife 8 is installed on the static contact of each vacuum interrupter 5. The two isolating knives 8 are matched with each conductive seat 2 correspondingly. When the insulating cylinder 4 is driven to rotate by the turntable 7, the vacuum interrupter 5 can drive the isolating knife 8 to rotate, so that the two isolating knives 8 are simultaneously matched with the corresponding conductive seat 2. The electric base 2 is disengaged to form a fracture or a combination. Just like setting up a vacuum arc chamber separately, there is also an electromagnetic pull rod mechanism in the insulating tube 4, but two crank arms 12 need to be arranged in the mounting base 6. The second ends of the two crank arms 12 are connected to the second end of the insulating pull rod 11, and the first ends of the two crank arms 12 are respectively connected to the moving contacts 5-2 of each vacuum arc chamber 5, so that the action of an insulating pull rod 11 can simultaneously drive the two moving contacts to disconnect or contact. Here, with reference to the drawings and the above introduction to the electromagnetic pull rod mechanism, the structure of the electromagnetic pull rod mechanism will not be repeated.

Claims

1. A combined electrical appliance, comprising a base (1), on which an insulator (3) for mounting a conductive seat (2) is arranged, characterized in that: An insulating cylinder (4) capable of rotating about its own axis is also arranged on the base (1), and a vacuum arc extinguishing chamber (5) capable of rotating along with the insulating cylinder (4) is arranged on the insulating cylinder (4); a mounting frame (6) is arranged on the top of the insulating cylinder (4), and the vacuum arc extinguishing chamber (5) is mounted on the mounting frame (6) in a manner that its axis is perpendicular to the axis of the insulating cylinder (4), and a turntable (7) for mounting the insulating cylinder (4) so ​​that it can rotate is arranged on the base (1); An isolating knife (8) is fixed on the static contact of the vacuum interrupter (5), and the isolating knife (8) can be separated from or combined with the conductive seat (2) when the vacuum interrupter (5) rotates; An electromagnetic pull rod mechanism for driving the vacuum arc extinguishing chamber (5) to open and close is also provided in the insulating cylinder (4).

2. The combined electrical appliance according to claim 1, characterized in that: The electromagnetic pull rod mechanism comprises an electromagnet (9), a suction disk (10), an insulating pull rod (11) and a crank arm (12); the electromagnet (9) is fixed on a turntable (7); the insulating pull rod (11) is movably arranged on the turntable (7) along the axial direction; the suction disk (10) is fixed to the first end of the insulating pull rod (11) close to the electromagnet; the crank arm (12) is L-shaped and its inflection point is hinged on the mounting frame (6); the first end of the crank arm (12) is connected to the moving contact of the vacuum arc extinguishing chamber (5); the second end of the crank arm (12) is connected to the second end of the insulating pull rod (11); a disconnecting spring (13) is arranged between the electromagnet (9) and the suction disk (10); and a pressure spring (14) capable of maintaining the combined pressure of the static contact and the moving contact is also arranged on the insulating pull rod (11); the insulating pull rod (11) moves along its axial direction to drive the crank arm (12) to swing and drive the moving contact to move along its axial direction.

3. The combined electrical appliance according to claim 2, characterized in that: A pair of vacuum arc extinguishing chambers (5) are arranged on the mounting frame (6), and an isolating knife (8) is installed on the static contact of each vacuum arc extinguishing chamber (5). A pair of insulators (3) are arranged on the base (1), and a conductive seat (2) matching with each isolating knife (8) is installed on each insulator (3). A pair of crank arms (12) whose second ends are connected to the second ends of the insulating pull rods (11) are hinged in the mounting frame (6), and the first ends of each crank arm (12) are respectively connected to the moving contacts of each vacuum arc extinguishing chamber (5).

4. The combined electrical appliance according to claim 2, characterized in that: The turntable (7) is driven to rotate by a motor.

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