CN211404386U

CN211404386U - Three-station isolating switch

Info

Publication number: CN211404386U
Application number: CN202020495086.0U
Authority: CN
Inventors: 陈明煌; 王杰
Original assignee: Shenheng Electric Equipment Co ltd
Current assignee: Shenheng Electric Equipment Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-09-01
Anticipated expiration: 2030-04-07

Abstract

The utility model provides a three-station isolating switch, include: isolating the blade assembly; the positioning mechanism is connected with the isolating blade assembly and applies acting force capable of offsetting self gravity to the isolating blade assembly, so that before the isolating blade assembly is driven by the energy storage spring assembly, the position of the isolating blade assembly can be kept still, the phenomenon that the isolating blade is close to a switching-on position or a grounding position in advance due to self weight and the isolating blade is caused to be subjected to arc discharge and ablation is avoided, and the safety performance of products is improved.

Description

Three-station isolating switch

Technical Field

The utility model relates to a high tension switchgear technical field, concretely relates to three station isolator.

Background

Three-position isolating switches are commonly used in fully-closed combined electrical appliances or ring main units, and the three positions refer to three working positions: the disconnecting switch comprises a closing position where a main fracture of the disconnecting switch is connected, an isolating position where the main fracture is separated and a grounding position of a grounding side.

A conventional operating mechanism of a three-position disconnecting switch is shown in fig. 3, and mainly includes a first operating shaft 01 and a second operating shaft 02 disposed up and down, an arm assembly disposed on the operating shaft, a spring energy storage assembly 03 driven by the first operating shaft, and a transmission assembly 04 connected to a disconnecting blade, where the first operating shaft 01 is connected to the spring energy storage assembly 03 through a first transmission arm 011, the second operating shaft 02 is connected to the spring energy storage assembly 03 through a second transmission arm 021, the arm assembly includes a first arm 012 disposed on the first operating shaft 01 and a second arm 022 disposed on the second operating shaft 02, the transmission assembly 04 includes an output shaft 041 adapted to drive the disconnecting blade, a cam 042 fixed on the output shaft 041, and a protrusion 043 disposed on the cam 042 (it should be noted that only a part of the transmission assembly is shown in fig. 3), and the disconnecting switch is in a disconnecting position, at this time, the bump 043 of the cam 042 is located between the first crank arm 012 and the second crank arm 022, and the first crank arm 012 and the second crank arm 022 define the rotation of the transmission assembly, thereby defining the position of the separation blade.

The inventor finds in practical work that under the condition that equipment is electrified, particularly when incoming lines are electrified, the isolating blade has certain probability and can be easily ablated due to arc discharge, and through analysis and summary, the situation can occur in the process that the isolating switch is switched from an isolating position to a switching-on position or a grounding position. For example, the disconnecting switch is switched from the disconnecting position to the switching-on position, as shown in fig. 3, before the first operating shaft 01 is manually driven to rotate clockwise until the spring energy storage assembly 03 passes through the middle (before the spring energy storage assembly 03 passes through the middle, the spring is in the energy storage state, and after the spring passes through the middle, the spring releases energy to quickly drive the crank arm assembly to act), the first crank arm 012 can remove the blocking to the bump 043, the transmission assembly composed of the cam 042, the output shaft 041 and the like can rotate by a certain angle under the action of self gravity, so that the disconnecting blade can be driven to rotate towards the direction close to the stationary contact base, that is, the disconnecting blade can approach the switching-on position or the grounding position in advance due to the self gravity, the disconnecting blade and the stationary contact base can be in a loose lap joint condition, thereby causing an arc discharge and ablation phenomenon, and thus reducing the safety performance of.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the isolation blade among the prior art and having certain probability take place to ablate, the defect that product security performance is low to provide one kind and be difficult for appearing the three station isolator that ablate, product security performance is high from the blade.

Therefore, the utility model provides a three-station isolating switch, including isolation blade subassembly and positioning mechanism, positioning mechanism with isolation blade subassembly links to each other, positioning mechanism to isolation blade subassembly is applyed the effort that can offset its self gravity.

The isolating blade assembly comprises an isolating blade and an isolating main shaft which is in linkage with the isolating blade.

The positioning mechanism comprises a transmission part, a positioning part and a pressure spring, the transmission part is fixedly arranged on the isolation main shaft, two limiting blocks arranged at intervals are arranged on one side of the transmission part, which is far away from the isolation main shaft, and a limiting groove is arranged between the two limiting blocks; the positioning piece is arranged on the cylinder body in a reciprocating manner and is provided with a positioning part which extends out of the cylinder body and can be matched, positioned and connected with the limiting groove; and the pressure spring is arranged in the barrel, one end of the pressure spring is abutted against the inner wall of the barrel, the other end of the pressure spring is abutted against the positioning piece, and the pressure spring applies a biasing force to the positioning piece to move towards the direction close to the transmission piece.

The limiting groove is an arc-shaped groove, and the positioning portion is a roller which is connected with the arc-shaped groove in an adaptive mode.

The outer wall of the limiting block is of a cambered surface structure.

The pressure spring is sleeved on the positioning piece, and a step which can be abutted against the pressure spring is arranged on the outer wall of the positioning piece.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a three-station isolating switch, including isolation blade subassembly and positioning mechanism, positioning mechanism links to each other with isolation blade subassembly, applys the effort that can offset its self gravity to isolation blade subassembly to before energy storage spring assembly drive isolation blade subassembly, avoided the isolation blade to be close closing position or ground position in advance because of the dead weight, lead to the isolation blade phenomenon that the arc discharge ablates to appear, help improving the security performance of product.

2. The utility model provides a three station isolator, positioning mechanism includes: the transmission part is fixedly arranged on the isolation main shaft, one side of the transmission part, which is far away from the isolation main shaft, is provided with two limiting blocks arranged at intervals, and a limiting groove is arranged between the two limiting blocks; the positioning piece is arranged on the cylinder body in a reciprocating way and is provided with a positioning part which extends out of the cylinder body and can be matched, positioned and connected with the limiting groove; and the pressure spring is arranged in the cylinder, one end of the pressure spring is abutted against the inner wall of the cylinder, the other end of the pressure spring is abutted against the positioning piece, and the pressure spring applies a biasing force to the positioning piece to move towards the direction close to the transmission piece. The positioning mechanism consisting of the transmission part, the positioning part and the pressure spring has simple structure and convenient use.

3. The utility model provides a three-station isolating switch, the limiting groove is an arc-shaped groove, the positioning part is a roller which is in adaptive connection with the arc-shaped groove, the roller can reduce the abrasion between the roller and the driving part, and the service life of the positioning part is prolonged; in addition, the outer wall of the limiting block is of a cambered surface structure, so that abrasion between the limiting block and the positioning piece can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an assembled perspective view of an isolation spindle, transmission and positioning mechanism;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a perspective view of a prior art three-position disconnector operating mechanism.

Description of reference numerals: 01. a first operating shaft; 011. a first transmission arm; 012. a first crank arm; 02. a second operating shaft; 021. a second drive arm; 022. a second crank arm; 03. a spring energy storage assembly; 04. a transmission assembly; 041. an output shaft; 042. a cam; 043. a bump;

1. isolating the main shaft; 2. a transmission member; 21. a limiting block; 22. a limiting groove; 3. a positioning member; 31. a roller; 32. a step; 4. a barrel; 5. a pressure spring.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a three-position disconnector, as shown in fig. 1 and 2, comprising an isolating blade assembly and a positioning mechanism.

Keep apart blade subassembly including keep apart blade (not drawn in the figure) and keep apart main shaft 1 that the blade linkage set up, keep apart on the main shaft 1 and fixedly be equipped with driving medium 2, driving medium 2 keeps away from keep apart one side of main shaft 1 and be equipped with the stopper 21 that two intervals set up, two be equipped with spacing groove 22 between the stopper 21, spacing groove 22 is the arc wall, the outer wall of stopper 21 is ARC structure.

The positioning mechanism is connected with the isolating blade assembly and applies an acting force positioning piece 3 capable of offsetting the self gravity to the isolating blade assembly, as shown in fig. 2, the positioning mechanism comprises a positioning piece 3 which is arranged on the cylinder body 4 in a reciprocating way, and the positioning piece 3 is provided with a positioning part which extends out of the cylinder body 4 and can be matched, positioned and connected with the limiting groove 22; and the pressure spring 5 is arranged in the barrel 4, one end of the pressure spring is abutted against the inner wall of the barrel 4, the other end of the pressure spring is abutted against the positioning piece 3, and the pressure spring 5 applies a biasing force to the positioning piece 3 to move towards the direction close to the transmission piece 2. In this embodiment, the positioning portion is a roller 31 adaptive to the arc-shaped groove, the pressure spring 5 is sleeved on the positioning member 3, and a step 32 which can abut against the pressure spring 5 is arranged on the outer wall of the positioning member 3.

The utility model discloses a three-station isolating switch, including isolation blade subassembly and positioning mechanism, positioning mechanism links to each other with isolation blade subassembly, and the effort that can offset its self gravity is applyed to isolation blade subassembly to before energy storage spring assembly drive isolation blade subassembly, isolation blade subassembly's position keeps motionless, has avoided isolation blade to be close closing position or ground connection position in advance because of the dead weight, has leaded to the isolation blade phenomenon that the arc discharge ablates to appear, helps improving the security performance of product.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A three-position isolating switch is characterized by comprising:

isolating the blade assembly;

a positioning mechanism coupled to the isolating blade assembly, the positioning mechanism applying a force to the isolating blade assembly that counteracts its own weight.

2. A three-position disconnecting switch according to claim 1, characterized in that the disconnecting blade assembly comprises a disconnecting blade and a disconnecting main shaft (1) which is linked with the disconnecting blade.

3. The three-position disconnector according to claim 2, wherein the positioning mechanism comprises:

the transmission part (2) is fixedly arranged on the isolation main shaft (1), two limiting blocks (21) arranged at intervals are arranged on one side of the transmission part, which is far away from the isolation main shaft (1), and a limiting groove (22) is arranged between the two limiting blocks (21);

the positioning piece (3) is arranged on the cylinder body (4) in a reciprocating manner and is provided with a positioning part which extends out of the cylinder body (4) and can be in adaptive positioning connection with the limiting groove (22);

and the pressure spring (5) is arranged in the barrel body (4), one end of the pressure spring is abutted against the inner wall of the barrel body (4), the other end of the pressure spring is abutted against the positioning piece (3), and the pressure spring (5) applies a biasing force which moves towards the direction close to the transmission piece (2) to the positioning piece (3).

4. A three-position isolating switch according to claim 3, wherein the limiting groove (22) is an arc-shaped groove, and the positioning part is a roller (31) which is in fit connection with the arc-shaped groove.

5. A three-position isolating switch according to claim 3 or 4, characterized in that the outer wall of the limiting block (21) is of a cambered surface structure.

6. A three-position isolating switch according to claim 3 or 4, characterized in that the pressure spring (5) is sleeved on the positioning member (3), and a step (32) which can be abutted against the pressure spring (5) is arranged on the outer wall of the positioning member (3).