High-capacity arc striking structure for isolating switch

Abstract

The invention relates to a high-capacity arc striking structure for an isolating switch. The high-capacity arc striking structure is characterized by comprising a movable side arc striking module and a static side arc striking module, in the switching-on process of the isolating switch, the arc striking contact is in contact with the main contact before the main contact is in contact, and the vacuum switch of the arc striking device is switched on before the main contact is in contact, so that switching-on and switching-off of the bus current are realized; in the opening process of the isolating switch, after the arc striking contact is separated from the main contact, the vacuum switch of the arc striking device is opened, and the on-off of the bus current is realized; as the switching-on and switching-off of the bus current are carried out in the arc extinguish chamber of the vacuum switch, the splashing of sparks of an arc striking contact can be effectively prevented, and the ablation of the surfaces of a main contact and an insulator is avoided; the arc striking structure is composed of a moving side arc striking contact, a static side arc striking contact and a vacuum switch, the moving side arc striking contact pushes the static side arc striking contact to enable a vacuum switch rotating shaft connected with the static side arc striking contact to rotate by means of the motion trail of a GW23 type disconnecting switch conductive arm, and opening and closing operation of the vacuum switch is achieved after the static side arc striking contact rotates to a certain angle.

Description

Technical Field

[0001] The invention relates to the technical field of isolating switches, and in particular to a large-capacity arc-starting structure for isolating switches. Background Art

[0002] The W23 type disconnector adopts the traditional arcing contact structure to open and close large-capacity busbar conversion current. The arcing contacts generate more sparks at the moment of contact and separation, with higher temperatures and a larger splashing range. Sparks can easily splash onto the contact position of the main contact fingers of the disconnector, causing the contact fingers to not be in contact, thereby causing contact fingers to burn; sparks can also easily splash onto the surface of the insulator shed, affecting the product's insulation to the ground. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a large-capacity arc-starting structure for an isolating switch, which can solve the problem that sparks are easily splashed to the contact position of the main contact fingers of the isolating switch when the general arc-starting contacts are in contact, causing the contact fingers and contacts to fail to contact in place, thereby causing the contact fingers to burn.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a large-capacity arc-starting structure for a disconnector, the innovation of which is: comprising a moving-side arc-starting module and a stationary-side arc-starting module; The moving side arc-striking module comprises an arc-striking contact, a copper circular arc cover and a spring; the arc-striking contact is a rod-shaped structure, and a limiting platform is provided at one end of the arc-striking contact, and a spring limiting block is fixedly provided on the circumference of the arc-striking contact; the copper circular arc cover has a pair, a through hole is opened in the center of the copper circular arc cover to accommodate the arc-striking contact, and the copper circular arc cover is symmetrically arranged on the arc-striking contact, and a gap is formed between the copper circular arc covers for clamping the static side arc-striking module; the spring has a pair, and one end of one of the springs rests on the outer side surface of the copper circular arc cover, and the other end rests on the limiting platform; one end of the other spring rests on the outer side surface of the other copper circular arc cover, and the other end rests on the spring limiting block; the copper circular arc cover is pressed by the spring to keep the two copper circular arc covers close to each other, providing sufficient clamping force to contact the static side arc-striking module; The static side arc striking module includes a finger contact rod and a vacuum switch; the finger contact rod is arranged on the side of the vacuum switch; the finger contact rod has a pair, and one end of the finger contact rod is commonly connected to a hinge seat, and the hinge seat is installed on the side of the vacuum switch and can rotate around the hinge, and a gap is formed between the two finger contact rods to accommodate the arc striking contacts between the copper arc covers; the other end of the finger contact rod is folded outward to form an arc-shaped trumpet-shaped structure; a vacuum arc extinguishing chamber is arranged in the vacuum switch.

[0005] Furthermore, a pin hole is formed on the side of the vacuum switch, and the hinge seat is connected to the pin hole of the vacuum switch via a pin shaft.

[0006] The advantages of the present invention are: 1) In the present invention, during the closing process of the isolating switch, the arcing contact contacts before the main contact, and the vacuum switch of the arcing device closes before the main contact contacts, so as to close the bus current; during the opening process of the isolating switch, the arcing contact separates after the main contact, and the vacuum switch of the arcing device opens to open the bus current. Since the closing and opening of the bus current are both carried out in the arc extinguishing chamber of the vacuum switch, the arcing contact sparks can be effectively prevented from splashing, and the main contact and insulator surface ablation can be avoided, and the isolating switch can improve the busbar switching current capacity.

[0007] 2) The arc-striking structure in the present invention is composed of moving and static side arc-striking contacts and a vacuum switch. The static side arc-striking contact is connected to the rotating shaft of the vacuum switch, and the moving side arc-striking contact is installed at the front end of the moving side conductive arm. By utilizing the motion trajectory of the conductive arm of the GW23 type isolating switch, the moving side arc-striking contact pushes the static side arc-striking contact to rotate the rotating shaft of the vacuum switch connected thereto. When it rotates to a certain angle, the opening and closing operations of the vacuum switch are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0009] Figure 1 The present invention is a front view of a moving-side arc-striking module of a large-capacity arc-striking structure for a disconnector.

[0010] Figure 2 The present invention is a front view of a static-side arc-striking module of a large-capacity arc-striking structure for an isolating switch.

[0011] Figure 3 The present invention is a top view of the contact state of a large-capacity arc-starting structure for an isolating switch. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0013] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] like Figures 1 to 3A large-capacity arc-starting structure for a disconnector is shown, comprising an arc-starting module 1 on a moving side and an arc-starting module 2 on a stationary side.

[0015] The moving side arc-striking module 1 comprises an arc-striking contact 11, a copper circular arc cover 12 and a spring 13; the arc-striking contact 11 is a rod-shaped structure, and a limiting platform is provided at one end of the arc-striking contact 11, and a spring limiting block is fixedly provided on the circumference of the arc-striking contact 11; there is a pair of copper circular arc covers 12, and a through hole for accommodating the arc-striking contact to pass through is opened in the center of the copper circular arc cover 12, and the copper circular arc covers 12 are symmetrically arranged on the arc-striking contact 11, and a gap for clamping the static side arc-striking module 2 is formed between the copper circular arc covers 12; there is a pair of springs 13, and one end of one of the springs 13 is against the outer surface of the copper circular arc cover 12, and the other end is against the limiting platform; one end of the other spring 13 is against the outer surface of the other copper circular arc cover 12, and the other end is against the spring limiting block; the copper circular arc cover 12 is pressed by the spring 13 to keep the two copper circular arc covers 12 close to each other, providing sufficient clamping force with the static side arc-striking module contact 2.

[0016] The static side arc striking module 2 includes a finger contact rod 21 and a vacuum switch 22; the finger contact rod 21 is arranged on the side of the vacuum switch 22; there is a pair of finger contact rods 21, and one end of the finger contact rods 21 is commonly connected to a hinge seat, and the hinge seat is installed on the side of the vacuum switch and can rotate around the hinge, and a gap is formed between the two finger contact rods 21 to accommodate the arc striking contacts between the copper arc covers 12; the other end of the finger contact rod 21 is folded outward to form an arc-shaped trumpet-shaped structure; a vacuum arc extinguishing chamber is arranged in the vacuum switch 22.

[0017] A pin hole is formed on the side of the vacuum switch 22, and the hinge seat is connected to the pin hole of the vacuum switch via a pin shaft.

[0018] The working principle of the present invention is: during the closing process of the isolating switch, the arcing contact contacts before the main contact, and the vacuum switch of the arcing device closes before the main contact contacts, so as to realize the closing of the bus current; during the opening process of the isolating switch, the arcing contact separates after the main contact, and the vacuum switch of the arcing device opens to realize the breaking of the bus current. Since the closing and breaking of the bus current are both carried out in the arc extinguishing chamber of the vacuum switch, the arcing contact sparks can be effectively prevented from splashing, the main contact and the insulator surface ablation can be avoided, and the isolating switch can improve the busbar conversion current capacity at the same time.

[0019] The arc-striking structure consists of moving and static arc-striking contacts and a vacuum switch. The static arc-striking contact is connected to the rotating shaft of the vacuum switch, and the moving arc-striking contact is installed at the front end of the moving conductive arm. By utilizing the motion trajectory of the conductive arm of the GW23 isolating switch, the moving arc-striking contact pushes the static arc-striking contact to rotate the rotating shaft of the vacuum switch connected to it. When it rotates to a certain angle, the opening and closing operations of the vacuum switch are realized.

[0020] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall all fall within the scope of the present invention claimed for protection.

Claims

1. A large-capacity arc-starting structure for a disconnector, characterized in that: It includes a moving side arc striking module and a stationary side arc striking module; The moving side arc-striking module comprises an arc-striking contact, a copper circular arc cover and a spring; the arc-striking contact is a rod-shaped structure, and a limiting platform is provided at one end of the arc-striking contact, and a spring limiting block is fixedly provided on the circumference of the arc-striking contact; the copper circular arc cover has a pair, a through hole is opened in the center of the copper circular arc cover to accommodate the arc-striking contact, and the copper circular arc cover is symmetrically arranged on the arc-striking contact, and a gap is formed between the copper circular arc covers for clamping the static side arc-striking module; the spring has a pair, and one end of one of the springs rests on the outer side surface of the copper circular arc cover, and the other end rests on the limiting platform; one end of the other spring rests on the outer side surface of the other copper circular arc cover, and the other end rests on the spring limiting block; the copper circular arc cover is pressed by the spring to keep the two copper circular arc covers close to each other, providing sufficient clamping force to contact the static side arc-striking module; The static side arc striking module includes a finger contact rod and a vacuum switch; the finger contact rod is arranged on the side of the vacuum switch; the finger contact rod has a pair, and one end of the finger contact rod is commonly connected to a hinge seat, and the hinge seat is installed on the side of the vacuum switch and can rotate around the hinge, and a gap is formed between the two finger contact rods to accommodate the arc striking contacts between the copper arc covers; the other end of the finger contact rod is folded outward to form an arc-shaped trumpet-shaped structure; a vacuum arc extinguishing chamber is arranged in the vacuum switch.

2. A large-capacity arc-starting structure for a disconnector according to claim 1, characterized in that: A pin hole is provided on the side of the vacuum switch, and the hinge seat is connected to the pin hole of the vacuum switch through a pin shaft.

Images