WO2023202162A1

WO2023202162A1 - Three-pole combined isolating switch with high safety

Info

Publication number: WO2023202162A1
Application number: PCT/CN2022/144416
Authority: WO
Inventors: 张涛; 丁声飞; 李荣明
Original assignee: 镇江市丹高电器有限公司
Priority date: 2022-04-22
Filing date: 2022-12-31
Publication date: 2023-10-26
Also published as: CN217426623U

Abstract

A three-pole combined isolating switch with high safety, the isolating switch comprising a switch frame, wherein the switch frame is sequentially provided with a first contact, a second contact, a third contact and a fourth contact from top to bottom; contact blades are respectively arranged between the first contact and the second contact, between the second contact and the third contact, and between the third contact and the fourth contact; the middle of the switch frame is further provided with a driving shaft, which is horizontally placed; and one end of the driving shaft is driven by an electric device, and the other end of the driving shaft is provided with a linkage mechanism. In the isolating switch, the first contact blade, the second contact blade and the third contact blade are simultaneously controlled by means of the linkage mechanism. Since opening and closing states of the contact blades are not identical, a situation wherein the three contact blades are simultaneously closed will not occur during use, such that an electrical power accident caused by means of a misoperation made by an operator is avoided, thereby improving the use safety of the isolating switch.

Description

A high-security three-pole combined isolation switch

Technical field

The utility model relates to an isolating switch, in particular to a high-security three-pole combined isolating switch.

Background technique

With the gradual implementation of my country's electric power energy conservation and emission reduction policies, the demand for high-voltage frequency conversion cabinets in the entire power industry is increasing. Each high-voltage frequency conversion cabinet needs to be equipped with multiple isolation switches. However, the common isolation switches currently on the market are independent of each other. Opening and closing, this makes the "five prevention" processing operations between different isolating switches too complicated, and it is easy to cause misoperation during the processing process and cause power accidents.

Utility model content

The purpose of this utility model is to solve the deficiencies of the existing technology and provide a highly safe three-pole combined isolation switch.

A high-security three-pole combined isolation switch includes a switch frame, the switch frame is provided with a first contact, a second contact, a third contact and a fourth contact in order from top to bottom, and There are contact blades with different opening and closing states between the first contact and the second contact, between the second contact and the third contact, and between the third contact and the fourth contact. The first contact blade is movably hinged at the lower end of the first contact, the second contact blade and the third contact blade are movably hinged at the upper and lower ends of the third contact respectively. There is also a horizontally placed driving shaft in the middle of the switch frame. , the driving shaft drives the linkage mechanism through the electric device. The linkage mechanism includes an upper linkage rod and a lower linkage rod connected to the driving shaft. The upper linkage rod is provided with an upper driven shaft, and the lower linkage rod is provided with a lower linkage rod. The driven shaft, the upper driven shaft and the first contact knife, the driving shaft and the second contact knife, and the lower driven shaft and the third contact knife are all connected through a rotating mechanism.

Preferably, the first contact, the second contact, the third contact and the fourth contact are fixed on the switch frame through several contact insulators.

Preferably, the first contact, the second contact and the fourth contact are movable contacts, and the third contact is a stationary contact.

Preferably, the electric device is a rotating motor.

Preferably, the driving shaft drives the linkage mechanism through human power.

Preferably, the rotating mechanism includes a contact blade insulator and a connecting piece. One end of the contact blade insulator is connected to the first contact blade, and the other end of the contact blade insulator is connected to the connecting piece. The connecting piece is fixed on the upper driven shaft. .

beneficial effects

The utility model discloses a high-security three-knife combined isolating switch. The isolating switch simultaneously controls the first contact knife, the second contact knife and the third contact knife through a linkage mechanism. Due to the opening and closing status of each contact knife, They are not exactly the same, so there will not be three contact knives closing at the same time during use, which avoids power accidents caused by operator misoperation and improves the safety of the equipment.

Description of the drawings

Figure 1 is the front view of the three-pole combined isolation switch;

Figure 2 is a side view of the three-pole combined isolation switch;

In the picture: 1. Switch frame 11. First contact 12. Second contact 13. Third contact 14. Fourth contact 15. Contact insulator 2. Contact knife 21. First contact knife 22. Second Contact knife 23. Third contact knife 3. Driving shaft 4. Linkage mechanism 41. Upper linkage rod 42. Lower linkage rod 43. Upper driven shaft 44. Lower driven shaft 5. Rotating mechanism 51. Contact knife insulator 52. Connection pieces.

Detailed ways

In order to deepen the understanding of the present utility model, the present utility model will be further described in detail below in conjunction with the embodiments and drawings. The embodiments are only used to explain the utility model and do not constitute a limitation on the protection scope of the present utility model.

As shown in Figures 1 and 2, a high-security three-pole combined isolating switch includes a switch frame 1 and a contact blade 2. The switch frame 1 is provided with first contacts 11, 11, and 2 contacts from top to bottom. The second contact 12, the third contact 13 and the fourth contact 14, and between the first contact 11 and the second contact 12, between the second contact 12 and the third contact 13, the third contact Between the head 13 and the fourth contact 14 is a contact blade 2 with different opening and closing states. The first contact blade 21 is movably hinged at the lower end of the first contact 11, and the second contact blade 22 and the third contact blade 22 are movable and hinged at the lower end of the first contact 11. The contact blades 23 are movably hinged at the upper and lower ends of the third contact 13 respectively. The middle part of the switch frame 1 is also provided with a horizontally placed driving shaft 3. The driving shaft 3 drives the linkage mechanism 4 through an electric device. The linkage mechanism 4 includes an upper linkage rod 41 and a lower linkage rod 42 connected to the driving shaft 3. The upper linkage rod 41 is provided with an upper driven shaft 43, and the lower linkage rod 42 is provided with a lower driven shaft 44. The upper driven shaft 43 and the first contact blade 21 , the driving shaft 3 and the second contact blade 22 , and the lower driven shaft 44 and the third contact blade 23 are all connected through the rotation mechanism 5 .

In this embodiment, the first contact 11 , the second contact 12 , the third contact 13 and the fourth contact 14 are fixed on the switch frame 1 through a plurality of contact insulators 15 .

In this embodiment, the first contact 11 , the second contact 12 and the fourth contact 14 are movable contacts, and the third contact 13 is a stationary contact.

In this embodiment, the electric device is a rotating motor.

In this embodiment, the driving shaft 3 drives the linkage mechanism 4 through human power.

In this embodiment, the rotating mechanism 5 includes a contact blade insulator 51 and a connecting piece 52. One end of the contact blade insulator 51 is connected to the first contact blade 21, and the other end of the contact blade insulator 51 is connected to the connecting piece 52. The connecting piece 52 is fixed on the upper driven shaft 43.

Working situation: As shown in Figure 2, the first contact knife 21 and the third contact knife 23 in the three-pole combined isolation switch are in the disconnected state, and the second contact knife 22 is in the closing state. At this time, the rotating motor or the operator drives The driving shaft 3 rotates clockwise. The driving shaft 3 drives the upper driven shaft 43 and the lower driven shaft 44 to rotate together through the upper linkage rod 41 and the lower linkage rod 42. The upper driven shaft 43 is taken as an example. During the rotation process, since the connecting piece 52 is fixed on the upper driven shaft 43, the connecting piece 52 drives the contact blade insulator 51 to rotate. At this time, the first contact blade 21 is driven by the contact blade insulator 51 and will move along the same direction as the first contact blade 21. The hinge of the first contact 11 rotates clockwise until the first contact blade 21 is closed. When the first contact blade 21 is in the closed state, the second contact blade 22 is in the disconnected state, and the third contact blade 23 is in the closed state. Closed status.

This isolating switch controls the first contact knife, the second contact knife and the third contact knife at the same time through the linkage mechanism. Since the opening and closing states of each contact knife are not exactly the same, the three contact knives will not be closed at the same time during use. The condition of the gate prevents power accidents caused by operator misoperation and improves the safety of the equipment.

The above descriptions are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in within the protection scope of this utility model.

Claims

A high-security three-pole combined isolation switch is characterized by including a switch frame, and the switch frame is provided with a first contact, a second contact, a third contact and a third contact in order from top to bottom. Four contacts, and contacts with different opening and closing states are provided between the first contact and the second contact, between the second contact and the third contact, and between the third contact and the fourth contact. The blades are respectively a first contact blade movably hinged at the lower end of the first contact, a second contact blade movably hinged at the upper end of the third contact, and a third contact blade movably hinged at the lower section of the third contact. The switch frame There is also a horizontally placed driving shaft in the middle. The driving shaft drives the linkage mechanism through an electric device. The linkage mechanism includes an upper linkage rod and a lower linkage rod connected to the driving shaft. The upper linkage rod is provided with an upper slave. Moving shaft, the lower linkage rod is provided with a lower driven shaft, between the upper driven shaft and the first contact knife, between the driving shaft and the second contact knife, and between the lower driven shaft and the third contact knife All are connected through rotating mechanisms.
A high-security three-pole combined isolation switch according to claim 1, characterized in that the first contact, the second contact, the third contact and the fourth contact are connected through a plurality of contacts. The head insulator is fixed to the switch frame.
A high-security three-pole combined isolation switch according to claim 1, characterized in that the first contact, the second contact and the fourth contact are movable contacts, and the third contact It is a static contact.
A high-security three-pole combined isolation switch according to claim 1, characterized in that the electric device is a rotating motor.
A high-security three-pole combined isolation switch according to claim 1, characterized in that the driving shaft drives the linkage mechanism through human power.
A high-security three-pole combined isolation switch according to claim 1, characterized in that the rotating mechanism includes a contact blade insulator and a connecting piece, one end of the contact blade insulator is connected to the first contact blade, and the contact blade The other end of the insulator is connected to the connecting piece, and the connecting piece is fixed on the upper driven shaft.