CN217280489U

CN217280489U - Change-over switch of high tension switchgear

Info

Publication number: CN217280489U
Application number: CN202122665084.9U
Authority: CN
Inventors: 凌海峰
Original assignee: Beijing Shougang Co Ltd
Current assignee: Beijing Shougang Co Ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-08-23
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses a change over switch of high tension switchgear relates to change over switch technical field, has solved the gear in the correlation technique too much and has complex operation, maintenance difficulty, the big technical problem of size. The switch comprises a closing gear, a separating gear and a neutral gear, wherein the neutral gear is configured to be kept conducted after the closing gear rebounds and kept conducted after the separating gear rebounds, and the change-over switch is matched with the control loop disconnection function of the comprehensive protection device. Through reducing unnecessary gear, be favorable to improving complex operation, make the flexible operation, be favorable to that the wiring is simple, the maintenance is convenient, be favorable to reducing change over switch's volume, size, have small, light in weight, simple to operate's advantage, overall structure is compact, and control accuracy is high.

Description

Change-over switch of high tension switchgear

Technical Field

The utility model relates to a change over switch technical field especially relates to a change over switch of high tension switchgear.

Background

A KYN18 series 10kV high-voltage cabinet is designed and used in a steelmaking 1#2# high-voltage distribution room, an LWB2 type universal change-over switch is arranged in the high-voltage cabinet, when the switch is matched with a comprehensive protection device for use, most of lines and contacts are redundant, for example, the comprehensive protection device has functions of controlling circuit disconnection and the like, a flash bus, a flash relay and other circuits are also arranged in the cabinet, and six operation positions including pre-dividing, opening, after-dividing, pre-closing, closing and after-closing are arranged, as shown in figure 1, manual intervention is needed, and the high-voltage distribution room has the defects of heavy size, complicated operation due to six operation positions and difficult maintenance and overhaul due to more wiring.

SUMMERY OF THE UTILITY MODEL

The application provides a change over switch of high tension switchgear, has solved in the correlation technique shelves too much and have complex operation, maintenance and repair difficulty, the big technical problem of size.

The application provides a change over switch of high tension switchgear, including closing a floodgate shelves, separating brake shelves and neutral gear, the neutral gear configuration keeps switching on and separating brake shelves keep switching on after rebounding for closing a floodgate and rebounding, wherein, change over switch and the cooperation of the control circuit broken string function of synthesizing the device of guaranteeing.

Optionally, the high voltage switchgear is equipped with a flash bus and a flash relay circuit, and the transfer switch cooperates with the flash bus and the flash relay circuit of the high voltage switchgear.

Optionally, the switching-on gear comprises four pairs of contact conduction, the switching-off gear comprises four pairs of contact conduction, the neutral gear keeps the two pairs of contact conduction and is the same as the four pairs of contact parts of the switching-on gear after the switching-on gear rebounds, and the neutral gear keeps the two pairs of contact conduction and is the same as the four pairs of contact parts of the switching-off gear after the switching-off gear rebounds.

Optionally, the change-over switch is provided with a first cam and a spring limiting part matched with the first cam, the first cam is connected with the knob, the spring limiting part comprises a first limiting spring and a T-shaped part connected with one end of the first limiting spring, contacts are arranged at two ends of the T-shaped part, and the top end of the T-shaped part is matched with the first cam to achieve connection or disconnection of a pair of contacts of the change-over switch.

Optionally, the T-shaped part includes a head portion and a rod portion fixedly connected to the head portion, contacts are respectively disposed at two ends of the head portion, one end of the rod portion, which is far away from the head portion, is disposed adjacent to the first cam, the head portion is made of a conductive material, and the rod portion is made of an insulating material;

the transfer switch is provided with contacts which mate with contacts of the tee.

Optionally, the head is made of steel.

Optionally, a housing of the change-over switch is provided with a groove for mounting one end of the first limiting spring.

Optionally, the change-over switch is provided with a reset mechanism, the reset mechanism includes a second cam, two limit arms respectively installed on two sides of the second cam in a limiting manner, and a second limit spring installed between one end of each limit arm and the shell of the change-over switch, and the other end of each limit arm is movably installed on the inner side of the shell of the change-over switch.

Optionally, the change-over switch is provided with a knob, the switching-on gear, the switching-off gear and the neutral gear are displayed by the knob, a switching-on indication, a switching-off indication and a neutral gear indication of the knob are arranged corresponding to the change-over switch shell, and the switching-on indication and the switching-off indication are respectively arranged on two sides of the neutral gear indication.

Optionally, the high-voltage switch cabinet comprises a KYN18 series 10kV high-voltage cabinet for a steelmaking high-voltage distribution room.

The beneficial effect of this application is as follows: the application provides a change over switch of high tension switchgear, utilize the control circuit function of breaking wire of comprehensive guarantor device, it is presorted originally, the separating brake, divide the back, it closes in advance, the combined floodgate, close the change over switch of six gears in the back, improve into combined floodgate shelves, the change over switch of the high tension switchgear of separating brake shelves and neutral gear, save and presorted originally, the gear setting of closing in advance, and will divide the back, the gear that closes converges into the neutral gear, the neutral gear specifically is keeping switching on after the combined floodgate shelves bounce back, and keep switching on after the separating brake shelves bounce back, through reducing unnecessary gear, be favorable to improving complex operation, make the flexible operation, be favorable to the wiring simple, the maintenance is convenient, be favorable to reducing change over switch's volume, size, have small, light in weight, simple to operate's advantage, compact overall structure, control accuracy is high.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

Fig. 1 is a schematic diagram illustrating a contact shift of a high-voltage cabinet change-over switch in the related art;

fig. 2 is a schematic diagram illustrating a contact shift connection condition of a change-over switch of a high-voltage switch cabinet provided by the present application;

fig. 3 is a schematic view of the transfer switch provided by the present application, in which a cam and a contact have elasticity to be opened and closed;

fig. 4 is a schematic diagram of the switch auto-return-to-zero function in the transfer switch provided by the present application.

The attached drawings are marked as follows: 100-first cam, 200-spring retainer, 210-first retainer spring, 211-groove, 220-T-piece, 221-head, 222-rod, 300-return mechanism, 310-second cam, 320-retainer arm, 330-second retainer spring.

Detailed Description

The embodiment of the application provides a change-over switch of high tension switchgear, has solved in the correlation technique that the gear is too much and have complex operation, maintenance and repair difficulty, technical problem that the size is big.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

a change-over switch of a high-voltage switch cabinet comprises a closing gear, a separating gear and a neutral gear, wherein the neutral gear is configured to be kept conducted after the closing gear rebounds and the separating gear rebounds, and is kept conducted, and the change-over switch is matched with a control circuit wire breaking function of a comprehensive protection device.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Referring to fig. 2 and fig. 1, in the present embodiment, a change-over switch of a high voltage switch cabinet is provided, where the high voltage switch cabinet includes a KYN18 series 10kV high voltage cabinet used in a steelmaking high voltage distribution room, and the change-over switch is provided with a closing gear, a separating gear, and a neutral gear, and the neutral gear is configured to be kept conductive after the closing gear rebounds and to be kept conductive after the separating gear rebounds, where the change-over switch is matched with a control circuit disconnection function of a fully-mechanized protection device.

The automatic control device is characterized in that a control loop wire breaking function of the comprehensive protection device is utilized, a change-over switch of six gears which are originally pre-divided, separated, pre-combined, closed and combined is improved into a change-over switch of a high-voltage switch cabinet of a closed gear, a separated gear and a neutral gear, the original pre-divided and pre-combined gears are omitted, the separated and combined gears are combined into the neutral gear, and the neutral gear is kept conducted after the closed gear rebounds and kept conducted after the separated gear rebounds.

As shown in fig. 2, from closed to neutral "first row", contacts 13-16, 17-19 remain on and contacts 5-8, 9-12 are disconnected. Correspondingly, there is a "second row" from the open gear to the neutral gear. Referring to fig. 1, the gear is similar to the gear after switching on and the gear after switching off after the preparatory switching on and the preparatory switching off are removed respectively.

The neutral gear configuration is configured to be kept on after the switching-on gear rebounds and kept on after the switching-off gear rebounds, and specifically, a self-resetting function can be provided to form a self-resetting type change-over switch. Specifically, as shown in fig. 4, the transfer switch is provided with a reset mechanism 300, the reset mechanism 300 includes a second cam 310, two limit arms 320 respectively installed at two sides of the second cam 310 in a limit manner, and a second limit spring 330 arranged between one end of the limit arm 320 and the shell of the transfer switch, and the other end of the limit arm 320 is movably installed inside the shell of the transfer switch.

The knob in this embodiment can also be understood as a handle. As shown in fig. 4, the second cam 310 is disposed, and both sides of the second cam are protruded and connected to the limiting arms 320 at both sides in a limiting manner, when the gear is changed, the knob is operated to drive the second cam 310 to rotate, so that the limiting arms 320 rotate, the second limiting spring 330 at one side is compressed, the second limiting spring 330 at the other side is also compressed, when a part of contacts are required to be automatically disconnected, the limiting arms 320 are driven to reset under the reset function of the second limiting spring 330, so as to realize the automatic disconnection of the part of contacts, for example, from a closing gear to a neutral gear, and as shown in fig. 2, the contacts 5-8 and 9-12 are automatically disconnected.

Optionally, the change-over switch is provided with a knob, the switching-on gear, the switching-off gear and the neutral gear are displayed by the knob, a switching-on indication, a switching-off indication and a neutral gear indication of the knob are arranged corresponding to the change-over switch shell, and the switching-on indication and the switching-off indication are respectively arranged on two sides of the neutral gear indication. In one possible embodiment, as shown in fig. 2, the handle angle for neutral is 0 °, the handle angle for closing is 45 °, and the handle angle for opening is-45 °.

Optionally, in the case that the high voltage switch cabinet is equipped with the flash bus and the flash relay loop, the flash contact of the change-over switch is further omitted, the flash relay and the flash bus are eliminated, the change-over switch is matched with the flash bus and the flash relay loop of the high voltage switch cabinet for application, and the structural specification, the size, the weight, the operation mode and the like are further optimized.

In one possible embodiment, as shown in fig. 2, the switching-on stage includes four pairs of contact conduction, the switching-off stage includes four pairs of contact conduction, the neutral stage keeps two pairs of contacts conduction and identical to four pairs of contacts of the switching-on stage after the switching-on stage rebounds, and the neutral stage keeps two pairs of contacts conduction and identical to four pairs of contacts of the switching-off stage after the switching-off stage rebounds.

Optionally, referring to fig. 3, the transfer switch is provided with a first cam 100 and a spring limiting member 200 engaged with the first cam 100, the first cam 100 is connected with a knob, the spring limiting member 200 includes a first limiting spring 210 and a T-shaped member 220 connected to one end of the first limiting spring 210, two ends of the T-shaped member 220 are provided with contacts, and a top end of the T-shaped member 220 is engaged with the first cam 100 to achieve connection or disconnection of a pair of contacts of the transfer switch.

Specifically, as shown in fig. 3, the first cam 100 is provided with a notch and a ring-shaped outer periphery. When the knob drives the first cam 100 to rotate until the top end of the T-shaped piece 220 is arranged in the notch, the extension length of the spring is large, and the pair of contacts are conducted through the T-shaped piece 220; when the knob drives the first cam 100 to rotate until the top of the T-piece 220 abuts against the outer ring under the action of the spring, the spring is compressed and the T-piece 220 separates from the contacts, thereby disconnecting the pair of contacts. Therefore, the contact is favorable for enhancing the connection strength of the contact, the contact is firm, and the unfavorable condition that the virtual connection phenomenon is frequent due to the small connection strength of the contact is improved.

Optionally, as shown in fig. 3, the T-shaped part 220 includes a head part 221 and a rod part 222 fixedly connected to the head part 221, contacts are respectively disposed at two ends of the head part 221, an end of the rod part 222 away from the head part 221 is disposed adjacent to the first cam 100, and the head part 221 is made of a conductive material, so that when the top end of the T-shaped part 220 is placed in the gap, a pair of contacts are conducted through the head part 221 of the T-shaped part 220; the rod portion 222 is made of an insulating material to maintain electrical insulation as much as possible, improve safety, and prevent electrical leakage; the transfer switch is provided with contacts that mate with the contacts of the tee 220, specifically the "pair of contacts of the transfer switch" in turning on or off the pair of contacts of the transfer switch as described above.

Alternatively, the head 221 may be made of a steel material, which has both good electrical conductivity and good structural stability.

Optionally, as shown in fig. 3, a groove 211 for mounting one end of the first limiting spring 210 is formed in the inner side of the housing of the switch. One end of the first limiting spring 210 is arranged in the groove 211, and the other end of the first limiting spring is fixedly connected with the head part 221 of the T-shaped part 220, so that the space limitation of the first limiting spring 210 is guaranteed in the integral assembly structure.

It is understood that the first limiting spring 210 and the second limiting spring 330 are substantially used as elastic members, and may be other types of elastic members besides the preferred spring type.

While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The change-over switch of the high-voltage switch cabinet is characterized by comprising a closing gear, a separating gear and a neutral gear, wherein the neutral gear is configured to be kept conducted after the closing gear rebounds and kept conducted after the separating gear rebounds;

wherein, the change-over switch cooperates with the control circuit disconnection function of the comprehensive protection device.

2. The transfer switch of claim 1, wherein said high voltage switchgear is equipped with a flash bus and a flash relay loop, said transfer switch cooperating with said flash bus and flash relay loop of said high voltage switchgear.

3. The transfer switch of claim 1, wherein the closing stage includes four contact conduction pairs and the opening stage includes four contact conduction pairs, and wherein the neutral stage maintains two contact conduction pairs and the same portion of the four contact conduction pairs of the closing stage after the closing stage rebounds, and wherein the neutral stage maintains two contact conduction pairs and the same portion of the four contact conduction pairs of the opening stage after the opening stage rebounds.

4. The transfer switch of claim 1, wherein the transfer switch is provided with a first cam and a spring retainer cooperating with the first cam, the first cam is connected with a knob, the spring retainer comprises a first retainer spring and a T-shaped member connected with one end of the first retainer spring, two ends of the T-shaped member are provided with contacts, and the top end of the T-shaped member cooperates with the first cam to connect or disconnect a pair of contacts of the transfer switch.

5. The transfer switch of claim 4, wherein the T-shaped member comprises a head portion and a rod portion fixedly connected to the head portion, the contact points are respectively disposed at two ends of the head portion, one end of the rod portion, which is far away from the head portion, is disposed adjacent to the first cam, the head portion is made of a conductive material, and the rod portion is made of an insulating material;

the transfer switch is provided with contacts that mate with the contacts of the tee.

6. The transfer switch of claim 5, wherein said head is made of steel.

7. The transfer switch of claim 4, wherein the housing of the transfer switch defines a recess for receiving an end of the first retaining spring.

8. The transfer switch of claim 1, wherein the transfer switch is provided with a reset mechanism, the reset mechanism comprises a second cam, two limit arms respectively installed at two sides of the second cam in a limiting way, and a second limit spring arranged between one end of each limit arm and the shell of the transfer switch, and the other end of each limit arm is movably installed at the inner side of the shell of the transfer switch.

9. The transfer switch of claim 8, wherein the transfer switch is provided with a knob, the switching-on gear, the switching-off gear and the neutral gear are displayed by the knob, a switching-on indication, a switching-off indication and a neutral indication of the knob are provided corresponding to the transfer switch shell, and the switching-on indication and the switching-off indication are respectively provided on two sides of the neutral indication.

10. The transfer switch of claim 1, wherein the high voltage switchgear comprises a KYN18 series 10kV high voltage switchgear for use in a steelmaking high voltage distribution cubicle.