CN218730637U

CN218730637U - High-voltage vacuum switch

Info

Publication number: CN218730637U
Application number: CN202222898520.1U
Authority: CN
Inventors: 林展辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-03-24
Anticipated expiration: 2032-11-01

Abstract

The utility model relates to a vacuum switch technical field, concretely relates to high-pressure vacuum switch, including the shell, shell internally mounted has the vacuum tube, and vacuum tube one side is run through and is equipped with the stationary contact pole, and the vacuum tube opposite side runs through and is equipped with the movable contact pole, and vacuum tube one side is inside to be seted up the cavity, the gasbag both sides respectively with two first sliding seal circle one side fixed connection, movable contact pole one side outer wall fixedly connected with a plurality of loop bars, the inside sliding connection of loop bar has the dead lever, movable contact pole one side is equipped with a plurality of insulation board. The utility model discloses a second stay cord and the piston rod that set up can avoid rack relative gear to move when the gasbag contracts to can avoid making insulation board relative movement when the movable contact rod removes, consequently can make the insulation board keep off between two contacts when the vacuum is not enough in the vacuum tube, force this high-pressure vacuum switch stop work, avoid the staff operation in violation of rules and regulations to produce electric arc when using and cause the potential safety hazard.

Description

High-voltage vacuum switch

Technical Field

The utility model relates to a vacuum switch technical field, concretely relates to high-pressure vacuum switch.

Background

Currently, there are two main types of contact switches in the field of high-voltage contact switches. The SF6 contact switch has good insulating property, the voltage level of 72.5kV and above is dominant, but the leaked waste gas is harmful to human bodies and has greenhouse effect. Vacuum switches perform well for applications in voltage classes of 40.5kV and below, but have insurmountable internal insulation problems for applications in high voltage classes above 40.5 kV. And high-pressure vacuum switch can utilize the vacuum tube to form the explosion chamber when using, wherein, because vacuum tube internal pressure and external pressure differ great, through long-term use or storage period, can produce phenomenons such as outside gas permeation and make its vacuum decline, and can residual air in the explosion chamber this moment, then can produce electric arc when the contact is separating, traditional vacuum switch is when using, then can not play the effect of arc extinguishing after the vacuum in the vacuum tube descends, can produce electric arc when this high-pressure vacuum switch continues to use, thereby easily cause the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

Solves the technical problem

To the above-mentioned shortcoming that prior art exists, the utility model provides a high-pressure vacuum switch can solve the problem that high-pressure vacuum switch among the prior art prevents this high-pressure vacuum switch to continue to use when the vacuum in the vacuum tube is not enough to play the arc extinguishing effect effectively.

Technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model provides a high-pressure vacuum switch, which comprises an outer shell, shell internally mounted has the vacuum tube, vacuum tube one side is run through and is equipped with the stationary contact pole, the vacuum tube opposite side runs through and is equipped with the movable contact pole, the inside cavity of having seted up in vacuum tube one side, cavity internally mounted has the gasbag, install two first sliding seal circle between cavity and the movable contact pole, the gasbag both sides respectively with two first sliding seal circle one side fixed connection, movable contact pole one side outer wall fixedly connected with a plurality of loop bar, the inside sliding connection of loop bar has the dead lever, movable contact pole one side is equipped with a plurality of insulation board, insulation board one end and movable contact pole outer wall elastic connection, loop bar internally mounted has actuating mechanism, binding post is all installed to movable contact pole, stationary contact pole one end.

Further, actuating mechanism includes the dwang, the thread groove has been seted up to the dwang outer wall. And the convex part on the inner wall of the fixed rod is in sliding contact with the inner wall of the thread groove.

Further, actuating mechanism still includes the gear, gear and dwang lower extreme fixed connection, loop bar one side sliding connection has the rack, rack and gear engagement transmission, the first stay cord of rack one end fixedly connected with, a plurality of piston rod has been inlayed to vacuum tube inner wall one end, piston rod and first stay cord one end fixed connection.

Furthermore, the other end of the piston rod is fixedly connected with a second pull rope, the tail end of the second pull rope is fixedly connected with the inner wall of the air bag, and a second sliding sealing ring is arranged between the piston rod and the vacuum tube.

Further, gasbag one end fixedly connected with pull rod, pull rod one end fixedly connected with stripper plate, contact switch is installed to vacuum tube outer wall one end, the alarm is installed to shell one end, contact switch and alarm electric connection.

Advantageous effects

The utility model provides a technical scheme compares with known public technique, has following beneficial effect:

1. the utility model discloses a second stay cord and the piston rod that set up can avoid rack relative gear to move when the gasbag contracts to can avoid making insulation board relative movement when the movable contact rod removes, consequently can make the insulation board keep off between two contacts when the vacuum is not enough in the vacuum tube, force this high-pressure vacuum switch stop work, avoid the staff operation in violation of rules and regulations to produce electric arc when using and cause the potential safety hazard.

2. The production of electric arc can be avoided through the carbon dioxide gas that sets up in the gasbag to can drive the pull rod after the gasbag shrink and make the stripper plate remove, can extrude the contact switch after the stripper plate removes, make the alarm report to the police, thereby remind the staff to change this high-pressure vacuum switch.

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 description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an internal view of the overall structure of the present invention;

FIG. 3 is a schematic view of the inside of the vacuum tube of the present invention;

FIG. 4 is a schematic view of the internal structure of the sealing plate and the loop bar of the present invention;

fig. 5 is a schematic view of a rotating rod portion of the present invention;

fig. 6 is a schematic view of a piston rod, a first pull rope and a second pull rope according to the present invention;

fig. 7 is an enlarged schematic view of the structure of the portion a of fig. 6 of the present invention;

FIG. 8 is a schematic view of the airbag and the squeeze plate of the present invention partially disassembled;

the reference numerals in the drawings denote: 1-a housing; 2-vacuum tube; 3-a stationary contact bar; 4-moving contact rod; 5-a cavity; 6-air bag; 7-a first sliding seal ring; 8-a loop bar; 9-fixing the rod; 10-an insulating plate; 11-a connecting terminal; 12-rotating rods; 13-thread groove; 14-a gear; 15-a rack; 16-a first pull cord; 17-a piston rod; 18-a second draw cord; 19-a second sliding seal ring; 20-a pull rod; 21-an extrusion plate; 22-contact switch; 23-alarm.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Example (b):

according to the attached drawings 1-8, a high-voltage vacuum switch comprises a shell 1, a vacuum tube 2 is installed inside the shell 1, a static contact rod 3 is arranged on one side of the vacuum tube 2 in a penetrating mode, a movable contact rod 4 is arranged on the other side of the vacuum tube 2 in a penetrating mode, a cavity 5 is formed inside one side of the vacuum tube 2, an air bag 6 is installed inside the cavity 5, two first sliding seal rings 7 are installed between the cavity 5 and the movable contact rod 4, two sides of the air bag 6 are fixedly connected with one side of the two first sliding seal rings 7 respectively, a plurality of loop bars 8 are fixedly connected to the outer wall of one side of the movable contact rod 4, a fixing rod 9 is connected inside the loop bars 8 in a sliding mode, a plurality of insulation plates 10 are arranged on one side of the movable contact rod 4, one end of each insulation plate 10 is elastically connected with the outer wall of the movable contact rod 4, a driving mechanism is installed inside the loop bars 8, and a wiring terminal 11 is installed at one end of each of the movable contact rod 4 and the static contact rod 3. The inside of the air bag 6 is filled with carbon dioxide gas which can effectively avoid electric arcs.

Specifically, referring to fig. 4 to 5, the driving mechanism includes a rotating rod 12, and a thread groove 13 is formed on an outer wall of the rotating rod 12. The protrusions on the inner wall of the fixing lever 9 are in sliding contact with the inner wall of the thread groove 13. When the rotating lever 12 is rotated, the thread groove 13 of the outer wall thereof can press the convex portion on the inner wall of the fixing lever 9, thereby enabling the fixing lever 9 to move in the direction of the loop bar 8.

Further, referring to fig. 5, the driving mechanism further includes a gear 14, the gear 14 is fixedly connected with the lower end of the rotating rod 12, one side of the loop bar 8 is slidably connected with a rack 15, the rack 15 is in meshing transmission with the gear 14, one end of the rack 15 is fixedly connected with a first pull rope 16, one end of the inner wall of the vacuum tube 2 is embedded with a plurality of piston rods 17, and the piston rods 17 are fixedly connected with one end of the first pull rope 16. The gear wheel 14 is able to rotate the turning rod 12 when moving relative to the rack 15.

Still further, referring to fig. 6-7, the other end of the piston rod 17 is fixedly connected with a second pulling rope 18, the end of the second pulling rope 18 is fixedly connected with the inner wall of the air bag 6, and a second sliding sealing ring 19 is installed between the piston rod 17 and the vacuum tube 2. After the air bag 6 is contracted, the second pull rope 18 is in a loose state, so that after the loop bar 8 moves, the piston rod 17 can be pulled by stretching to enable the piston rod 17 to be separated from the inner wall of the vacuum tube 2, and further, the first pull rope 16 can be kept in the loose state, so that the rack 15 can be prevented from moving relative to the gear 14.

On the basis of the above scheme, referring to fig. 7, one end of the airbag 6 is fixedly connected with a pull rod 20, one end of the pull rod 20 is fixedly connected with an extrusion plate 21, one end of the outer wall of the vacuum tube 2 is provided with a contact switch 22, one end of the shell 1 is provided with an alarm 23, and the contact switch 22 is electrically connected with the alarm 23. The contact switch 22 can control the alarm 23 to give an alarm when being squeezed, so that the alarm 23 can be used for reminding a worker of replacing the high-voltage vacuum switch in time.

When the movable contact rod 4 approaches the fixed contact rod 3, the first pull rope 16 can be straightened after the movable contact rod 4 moves to a certain position, so as to limit the rack 15, at the moment, the movable contact rod 4 continues to move to drive the loop rod 8 on the outer wall of the movable contact rod to move, the loop rod 8 can drive the rotating rod 12 and the gear 14 inside the movable contact rod to move, the gear 14 can be meshed with the rack 15 when moving, so as to drive the rotating rod 12 to rotate, the rotating rod 12 can extrude the bulge on the inner wall of the fixed rod 9 under the action of the thread groove 13 on the outer wall of the rotating rod 12 when rotating, so as to further enable the fixed rod 9 to move along the direction of the loop part, at the moment, a plurality of insulating plates 10 can move around under the action of the fixed rod 9, so as to move away from one side of a contact on the movable contact rod 4, and then when the movable contact rod 4 continues to move, when the movable contact rod 4 moves to the initial position, the contact on the movable contact rod 4 will be separated from the contact on the fixed contact rod 3, and when the movable contact rod 4 moves, the insulating plate 10 and the fixed rod 9 can move along the direction of the sleeve rod 8 under the action of the spring on the insulating plate 10, and the bulge on the inner wall can press the inner wall of the thread groove 13 when the fixed rod 9 moves, so that the rotating rod 12 can rotate reversely, the rotating rod 12 rotates reversely, so that the rack 15 can move to the initial position relative to the rack 15, and can be blocked between the two contacts after a plurality of insulating plates 10 move simultaneously, wherein, because the vacuum tube 2 is in vacuum environment, the first sliding seal ring 7 on the inner side of the vacuum tube 2 is easy to damage, when the first sliding seal ring 7 on the inner side of the vacuum tube 2 is damaged, the carbon dioxide in the air bag 6 can enter the vacuum tube 2, and the gasbag 6 at this moment will contract, the second rope 18 will be in the loose state after the gasbag 6 contracts, at this moment, the loop bar 8 will drive the rack 15 to move when the movable contact rod 4 approaches to the static contact rod 3, and can drive the piston rod 17 to move under the effect of the first rope 16, therefore the first rope 16 still keeps the loose state after the movable contact rod 4 moves to a certain position, and then the rack 15 will not keep still under the effect of the first rope 16, and thus can not move relative to the gear 14, so the rotating rod 12 can not rotate, and at the same time the insulating plate 10 can not move any more, several insulating plates 10 will be attached together and blocked between two contacts under the effect of one side spring thereof, prevent the two contacts from contacting, and can drive the pull rod 20 to move after the gasbag 6 contracts, can drive the extrusion plate 21 at one end thereof to move after the pull rod 20 moves, can extrude the contact switch 22 after the extrusion plate 21 moves, thereby controlling the alarm 23 to alarm, remind the staff to change the device in time.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a high-pressure vacuum switch, its characterized in that, includes shell (1), shell (1) internally mounted has vacuum tube (2), vacuum tube (2) one side is run through and is equipped with quiet feeler lever (3), vacuum tube (2) opposite side is run through and is equipped with movable contact rod (4), inside cavity (5) of having seted up in vacuum tube (2) one side, cavity (5) internally mounted has gasbag (6), install two first sliding seal circle (7) between cavity (5) and movable contact rod (4), gasbag (6) both sides respectively with two first sliding seal circle (7) one side fixed connection, movable contact rod (4) one side outer wall fixed connection has a plurality of loop bar (8), loop bar (8) internal sliding connection has dead lever (9), movable contact rod (4) one side is equipped with a plurality of insulation board (10), insulation board (10) one end and movable contact rod (4) outer wall elastic connection, loop bar (8) internally mounted has actuating mechanism, binding post (11) are all installed to movable contact rod (4), quiet feeler lever (3) one end.

2. The high-pressure vacuum switch according to claim 1, wherein the driving mechanism comprises a rotating rod (12), the outer wall of the rotating rod (12) is provided with a threaded groove (13), and a convex part on the inner wall of the fixing rod (9) is in sliding contact with the inner wall of the threaded groove (13).

3. The high-pressure vacuum switch according to claim 2, characterized in that the driving mechanism further comprises a gear (14), the gear (14) is fixedly connected with the lower end of the rotating rod (12), one side of the loop bar (8) is slidably connected with a rack (15), the rack (15) is in meshing transmission with the gear (14), one end of the rack (15) is fixedly connected with a first pull rope (16), one end of the inner wall of the vacuum tube (2) is embedded with a plurality of piston rods (17), and the piston rods (17) are fixedly connected with one end of the first pull rope (16).

4. A high-pressure vacuum switch according to claim 3, characterized in that a second pull rope (18) is fixedly connected to the other end of the piston rod (17), the end of the second pull rope (18) is fixedly connected to the inner wall of the air bag (6), and a second sliding sealing ring (19) is installed between the piston rod (17) and the vacuum tube (2).

5. The high-voltage vacuum switch according to claim 1, wherein a pull rod (20) is fixedly connected to one end of the air bag (6), a pressing plate (21) is fixedly connected to one end of the pull rod (20), a contact switch (22) is installed at one end of the outer wall of the vacuum tube (2), an alarm (23) is installed at one end of the housing (1), and the contact switch (22) is electrically connected with the alarm (23).