WO2020124299A1

WO2020124299A1 - Three-phase linkage isolating switch

Info

Publication number: WO2020124299A1
Application number: PCT/CN2018/121385
Authority: WO
Inventors: 杨小洋
Original assignee: 江苏省如高高压电器有限公司
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-06-25

Abstract

A three-phase linkage isolating switch, comprising a holder (1), an electric mechanism (2), a transmission rod (3), a pull rod (4), conductive arms (5), a base (6), and insulators (7). In this solution, a double pull rod structure is used for the three-phase linkage isolating switch so that the transmission is more stable. During switch off, contact fingers do not provide the pressure and have no risk of becoming invalid. The contact fingers can provide a high pressure, and have low sensitivity and low debugging difficulty. A grounding knife switch stationary contact is provided in the conductive arm, which can reduce the radio interference. A grounding knife switch is opened laterally, which has no risk of insufficient insulation and makes it more convenient to design the three-phase linkage. A floating fulcrum is used for a grounding knife switch rotation shaft. A torsion spring is used for achieving self-balance to avoid the generation of a residual stress.

Description

Three-phase linkage disconnector

Technical field

The invention relates to the field of isolation switches, in particular to a three-phase linkage isolation switch.

Background technique

The isolating switch is an electrical device used to open and close the circuit in the power system. The isolating switch mainly includes a contact, a contact finger, and an arc starting device. The arc starting device includes two arc starting rods, and the two arc starting rods are respectively side contacts. The arc rod and the contact finger side arc starting rod, the contact side arc starting rod is connected with the contact, and the contact finger side arc starting rod is connected with the contact finger. During the closing process of the disconnecting switch, the two arc starting rods are conductively contacted before the contact of the contact and the contact finger, arcing occurs on the two arc starting rods, and then the contact and the contact finger are brought into contact again to complete the closing action. During the opening process, before the contact and the finger are separated, the two arc starting rods are in conductive contact, and when the contact and the finger are separated, the two arc starting rods are separated. The arc starting device plays a role in protecting the contact fingers and contacts of the isolating switch during the opening and closing of the isolating switch. When the two arc starting rods contact, sparks will be generated due to the arc, and the arc starting rod is far away from the contacts and fingers Recently, the sparks generated on the arc starting rod will splash on the contacts and fingers, causing damage to the fingers and contacts, and affecting the functions of the contacts and fingers.

Summary of the invention

The technical problem to be solved by the present invention is to provide a three-phase linkage disconnector, which can solve the problem that a general single-bar type disconnector easily causes contact wobbling during operation, and the contacts are susceptible to radio interference.

In order to solve the above technical problems, the technical solution of the present invention is: a three-phase linkage disconnector, whose innovations include: including a bracket, an electric mechanism, a transmission rod, a tie rod, a conductive arm, a base and an insulator;

The brackets are cylindrical and arranged in two rows and three rows. The bottom ends of the brackets are connected to the foundation by anchor bolts; the tops of the adjacent two rows of brackets are provided with bases and connected by the bases. The insulators have a number of Set perpendicular to the base and coaxial with the bracket at the top of the bracket, the conductive arm is horizontally arranged on the insulator, and the conductive arm can rotate around the top of the insulator in the horizontal plane;

The electric mechanism has at least two of a horizontal operation electric mechanism and a vertical operation electric mechanism. The horizontal operation electric mechanism operates a conductive arm on two rows of insulators to rotate through a pull rod, and the vertical operation electric mechanism passes a pull rod Actuate the conductive arms on each row of insulators to rotate; the electric mechanism is arranged between two brackets in the middle row through a connecting frame; the output end of the electric mechanism is provided with a transmission rod along the vertical direction; the pull rod Set perpendicular to the direction of the transmission rod; the rod connected to the transmission rod at the output end of the longitudinally operated electric mechanism is a double rod structure formed by a pair of parallel rod units, and one end of the pair of rod units passes through the rotary plate and the top of the transmission rod Connected, the other end of the rod unit is connected to the insulator through a rotary piece to realize the linkage of the middle row of insulators; the rod connected to the transmission rod of the output end of the lateral operation electric mechanism is connected to the insulators of each row to achieve the end of each row of insulators Conductive arm linkage.

Further, a terminal is provided on the end of the conductive arm connected to the insulator; the other end of the conductive arm is provided with a ground knife static contact embedded therein.

Further, a plurality of contact fingers corresponding to the movable contact of the ground knife are provided on the static contact of the ground knife, and the contact finger is a spring leaf structure.

Further, the ground knife rotating shaft is also provided on the base, and the ground knife rotating shaft and the base are connected and set by a floating fulcrum through a torsion spring. The ground knife rotating shaft can rotate around the floating fulcrum on the base, and the ground knife rotating shaft passes through the shaft The elastic force of the torsion spring achieves self-balancing.

The advantages of the present invention are:

1) In the present invention, the three-phase linkage disconnector adopts the double-rod structure to drive more stable, and the contact finger itself does not provide pressure when closing, and there is no risk of failure; the contact finger can provide higher pressure, low sensitivity, and debugging difficulty Low; the static contact of the ground knife is placed inside the conductive arm, which can reduce radio interference; the opening direction of the ground knife is side open, there is no risk of insufficient insulation, and it is more convenient for three-phase linkage design; the rotary shaft of the ground knife adopts a floating fulcrum. Spring to achieve self-balancing, can avoid the generation of internal stress.

BRIEF DESCRIPTION

The present invention will be further described in detail below with reference to the drawings and specific embodiments.

FIG. 1 is a front view of a three-phase linkage disconnector of the present invention.

2 is a side view of a three-phase linkage disconnector of the present invention.

3 is a top view of a three-phase linkage disconnector of the present invention.

detailed description

The following embodiments can enable those skilled in the art to more fully understand the present invention, but do not limit the present invention to the scope of the described embodiments.

As shown in FIGS. 1 to 3, a three-phase linkage disconnector includes a bracket 1, an electric mechanism 2, a transmission rod 3, a draw rod 4, a conductive arm 5, a base 6 and an insulator 7.

The bracket 1 is cylindrical and arranged in two rows and three rows. The bottom end of the bracket 1 is connected to the foundation by anchor bolts; the tops of the adjacent two rows of brackets 1 are provided with a base 6 and connected by the base 6, the insulator 7 has Several are arranged perpendicular to the base 6 and coaxially with the bracket 1 at the top of the bracket 1. The conductive arm 5 is horizontally arranged on the insulator 7. The conductive arm 5 can rotate around the top of the insulator 7 in a horizontal plane.

The electric mechanism 2 has at least two horizontally operated electric mechanisms 21 and a longitudinally operated electric mechanism 22, the horizontally operated electric mechanism 21 actuates the conductive arm 5 on the two rows of insulators 7 through the rod 4 to rotate The motor-driven mechanism 22 actuates the conductive arm 5 on each row of insulators 7 through a pull rod 4 to rotate; the motor-driven mechanism 2 is disposed between two brackets 1 in the middle row through a connecting frame; the output end of the motor-driven mechanism 2 A transmission rod 3 is provided in the vertical direction; the rod 4 is arranged perpendicular to the direction of the transmission rod 3; the rod 4 connected to the transmission rod 3 at the output end of the longitudinal operating electric mechanism 22 is formed by a pair of parallel rod units 41 Double tie rod structure, and one end of the pair of tie rod units 41 is connected to the top end of the transmission rod 3 through the rotary piece 42 and the other end of the tie rod unit 41 is connected to the insulator 7 through the rotary piece 42 to realize the linkage of the insulator 7 in the middle row; The pull rod 4 connected to the driving rod 3 at the output end of the electric motor mechanism 21 is connected to the insulators 7 of each row to realize the linkage of the conductive arms 5 at the end of the insulator 7 of each row.

A terminal is provided on the end of the conductive arm 5 connected to the insulator 7; the other end of the conductive arm 5 is provided with a ground knife static contact embedded therein.

The static contact of the ground knife is provided with a plurality of contact fingers corresponding to the moving contact of the ground knife, and the contact finger is a spring leaf structure.

The ground knife rotating shaft is also provided on the base 6, and the ground knife rotating shaft 8 and the base 6 are connected by a floating fulcrum through a torsion spring. The ground knife rotating shaft 8 can rotate around the floating fulcrum on the base, and the ground knife rotating shaft 8 passes through the shaft The elastic force of the torsion spring achieves self-balancing.

Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and the description only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and improvements, which fall within the scope of the claimed invention. The claimed protection scope of the present invention is defined by the appended claims and their equivalents.

Claims

A three-phase linkage disconnector is characterized by including a bracket, an electric mechanism, a transmission rod, a pull rod, a conductive arm, a base and an insulator;

The brackets are cylindrical and arranged in two rows and three rows. The bottom ends of the brackets are connected to the foundation by anchor bolts; the tops of the adjacent two rows of brackets are provided with bases and connected by the bases. The insulators have a number of Set perpendicular to the base and coaxial with the bracket at the top of the bracket, the conductive arm is horizontally arranged on the insulator, and the conductive arm can rotate around the top of the insulator in the horizontal plane;

The electric mechanism has at least two of a horizontal operation electric mechanism and a vertical operation electric mechanism. The horizontal operation electric mechanism operates a conductive arm on two rows of insulators to rotate through a pull rod, and the vertical operation electric mechanism passes a pull rod Actuate the conductive arms on each row of insulators to rotate; the electric mechanism is arranged between two brackets in the middle row through a connecting frame; the output end of the electric mechanism is provided with a transmission rod along the vertical direction; the pull rod Set perpendicular to the direction of the transmission rod; the rod connected to the transmission rod at the output end of the longitudinally operated electric mechanism is a double rod structure formed by a pair of parallel rod units, and one end of the pair of rod units passes through the rotary plate and the top of the transmission rod Connected, the other end of the rod unit is connected to the insulator through a rotary piece to realize the linkage of the middle row of insulators; the rod connected to the transmission rod of the output end of the lateral operation electric mechanism is connected to the insulators of each row to achieve the end of each row of insulators Conductive arm linkage.
A three-phase linkage disconnector according to claim 1, characterized in that: the end of the conductive arm connected to the insulator is provided with a terminal; the other end of the conductive arm is provided with a built-in ground knife static Contact.
The three-phase linkage disconnector according to claim 2, wherein the ground knife static contact is provided with a plurality of contact fingers corresponding to the ground knife moving contact, and the contact fingers are of a spring leaf structure.
The three-phase linkage disconnector according to claim 1, characterized in that: the base is further provided with a ground knife rotating shaft, and the ground knife rotating shaft is connected to the base by a floating fulcrum connection, and the ground knife The rotating shaft can rotate around the floating fulcrum on the base, and the rotating shaft of the ground knife realizes self-balancing by the elastic force of the shaft torsion spring.