Heavy-current disconnecting link type three-position disconnecting switch

Abstract

The utility model discloses a heavy-current knife-switch type three-station isolating switch, which comprises a bottom plate and a side plate, the side plate is vertically arranged at one end of the bottom plate, an isolating switch main shaft is arranged on the side plate, two ends of the isolating switch main shaft are connected with the side plate through a fixing support, three groups of crank arms are arranged on the isolating switch main shaft, and insulating pull rods are rotatably connected onto the crank arms. The other end of the insulating pull rod is rotationally connected with an isolating blade; three groups of fixed plates are arranged on the bottom plate, the fixed plates are connected with the bottom plate through insulators, fixed contacts are arranged on the fixed plates, and the fixed contacts are movably connected with the isolation blades; and three groups of grounding contacts are further included, and the grounding contacts are movably connected with the isolation blades. The isolation or grounding operation can be completed by arranging the insulation pull rod to drive the isolation blade to swing, the structure is simple, the applicability is high, and production, installation and debugging are convenient; by arranging the radiating fins outside the isolation blades, the operation of the high-current isolation switch can be more reliable and safer.

Description

Technical Field

[0001] The utility model relates to the technical field of power system control, in particular to a high-current knife-type three-position isolating switch. Background Art

[0002] With the rapid development of gas insulated switchgear products in recent years, gas insulated switchgear is used in power distribution systems such as power plants, substations, high-rise buildings, industrial and mining enterprises, subways, etc. The rated current of the load is increasingly required to reach 2500A and above. At present, most of the high-current equipment is air-type. Therefore, how to make a high-current knife-type three-position disconnector that can meet the large current, is compact in size and can adapt to mainstream gas insulated switchgear has become a problem to be solved. To this end, we have launched a high-current knife-type three-position disconnector. Utility Model Content

[0003] The utility model aims to provide a high-current knife-type three-position isolating switch to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large-current knife-switch type three-position isolating switch, comprising a base plate and a side plate, wherein the side plate is vertically arranged at one end of the base plate, and an isolating switch main shaft is provided on the side plate, and both ends of the isolating switch main shaft are connected to the side plate through fixed brackets, and three groups of crank arms are provided on the isolating switch main shaft, and an insulating pull rod is rotatably connected to the crank arm, and the other end of the insulating pull rod is rotatably connected to an isolating blade; three groups of fixed plates are provided on the base plate, and the fixed plates are connected to the base plate through insulators, and fixed contacts are provided on the fixed plates, and the fixed contacts are movably connected to the isolating blades; and three groups of grounding contacts are also provided, and the grounding contacts are movably connected to the isolating blades.

[0005] Preferably, a connecting sleeve is provided at one end of the isolation blade, and the isolation blade is rotatably connected to the connecting sleeve.

[0006] Preferably, the grounding contact is directly provided with a grounding copper busbar.

[0007] Preferably, there are several isolation blades, and heat sinks are provided on the outside.

[0008] Preferably, reinforcing ribs are provided on the inner side of the side panels.

[0009] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model can complete the isolation or grounding operation by arranging an insulating pull rod to drive the isolation blade to swing, has a simple structure and high applicability, and is convenient for production, installation and debugging; by arranging a heat sink outside the isolation blade, the operation of the large current isolation switch can be more reliable and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model.

[0011] In the figure: 100, bottom plate; 200, side plate; 3, fixed bracket; 4, main shaft of disconnector; 5, crank arm; 6, connecting sleeve; 7, insulator; 8, fixed plate; 9, fixed contact; 10, isolating blade; 11, insulating pull rod; 12, grounding contact; 13, grounding copper busbar; 14, reinforcing rib. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] See also Figure 1 The utility model provides a technical solution: a high-current knife switch type three-position disconnector, comprising a bottom plate 100 and a side plate 200, wherein the side plate 200 is vertically arranged at one end of the bottom plate 100, and an isolating switch main shaft 4 is arranged on the side plate 200, and the isolating switch main shaft 4 is connected to an external transmission mechanism through gears, and the external transmission mechanism drives the isolating switch main shaft 4 to rotate through a control gear, and the two ends of the isolating switch main shaft 4 are connected to the side plate 200 through a fixed bracket 3, and the isolating switch main shaft 4 is rotatably arranged on the fixed bracket 3, and three groups of crank arms 5 are arranged on the isolating switch main shaft 4, and an insulating pull rod 11 is rotatably connected to the crank arm 5, and the insulating pull rod 11 is made of DMC material and plays an insulating role. The other end of 11 is rotatably connected with an isolation blade 10; three groups of fixed plates 8 are arranged on the base plate 100, and the fixed plates 8 are made of hard aluminum, which play the role of heat dissipation, fixing the main busbar and connecting the fixed contacts 9. The fixed plates 8 are connected to the base plate 100 through the insulator 7. The fixed plates 8 are provided with fixed contacts 9, which are made of red copper T2 and are the main components for conducting current. The cross-section and length of the fixed contacts 9 can be selected according to the required rated current, and the connection position can also be customized according to actual needs. The fixed contacts 9 are movably connected to the isolation blade 10; it also includes three groups of grounding contacts 12, which are made of red copper T2 and are movably connected to the isolation blade 10.

[0014] Specifically, one end of the isolation blade 10 is provided with a connecting sleeve 6, and the isolation blade 10 is rotatably connected to the connecting sleeve 6. The isolation blade 10 swings between the fixed contact 9 and the grounding contact 12 with the connecting sleeve 6 as a fulcrum to achieve isolation or grounding operation. Specifically, the operating handle is inserted into the operating hole in the operating mechanism, and the external transmission mechanism drives the operating gear to rotate, through the gear transmission component and through the isolating switch main shaft 4 to drive the crank arm 5 to swing, the crank arm 5 then drives the insulating pull rod 11 to move, and the insulating pull rod 11 drives the isolation blade 10 to swing to achieve isolation or grounding.

[0015] Specifically, the grounding contacts 12 are directly provided with a grounding copper bar 13 , and the grounding copper bar 13 connects the grounding contacts 12 together.

[0016] Specifically, there are several isolation blades 10 , and the number of blades can be selected according to the required rated current. A heat sink is provided outside to dissipate heat for the isolation blades 10 .

[0017] Specifically, a reinforcing rib 14 is provided on the inner side of the side plate 200 .

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high current knife switch type three-position isolating switch, comprising a bottom plate and a side plate, wherein the side plate is vertically arranged at one end of the bottom plate, characterized in that: The side panel is provided with an isolating switch main shaft, and both ends of the isolating switch main shaft are connected to the side panel through fixed brackets. Three groups of crank arms are provided on the isolating switch main shaft, and an insulating pull rod is rotatably connected to the crank arm, and the other end of the insulating pull rod is rotatably connected to an isolating blade; three groups of fixed plates are provided on the bottom plate, and the fixed plates are connected to the bottom plate through insulators. Fixed contacts are provided on the fixed plates, and the fixed contacts are movably connected to the isolating blades; and three groups of grounding contacts are also provided, and the grounding contacts are movably connected to the isolating blades.

2. A high current knife switch type three-position isolating switch according to claim 1, characterized in that: A connecting sleeve is provided at one end of the isolation blade, and the isolation blade is rotatably connected to the connecting sleeve.

3. A high current knife switch type three-position isolating switch according to claim 2, characterized in that: The grounding contact is directly provided with a grounding copper busbar.

4. A high current knife switch type three-position isolating switch according to claim 3, characterized in that: The number of the isolation blades is several, and a heat sink is arranged outside the isolation blades.

5. A high current knife switch type three-position isolating switch according to claim 1, characterized in that: The inner side of the side plate is provided with reinforcing ribs.

Images