CN211208284U

CN211208284U - Box-type substation protection device

Info

Publication number: CN211208284U
Application number: CN201922378684.XU
Authority: CN
Inventors: 聂广起; 李会亮; 姬晓晨; 冯翠芬
Original assignee: Henan Zhongkun Industrial Co ltd
Current assignee: Henan Zhongkun Industrial Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-08-07
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a box-type substation protection device, which comprises a high-pressure part and a low-pressure part, wherein the high-pressure part comprises a sealed shell, N groups of movable contacts are arranged in the shell, N is more than or equal to 1, and fixed contacts with the same number are arranged at corresponding positions in the shell; the low-voltage part comprises a fixed end and a lock tongue, the lock tongue is movably inserted into the fixed end, and a second pull type electromagnet for limiting the motion of the lock tongue is arranged in the fixed end; when the spring bolt is inserted in the fixed end, the movable contact is in electrical contact with the fixed contact, when the spring bolt is separated from the fixed end, the movable contact is electrically isolated from the fixed contact, when the movable contact is in electrical contact with the fixed contact, the spring bolt is locked by the second pull type electromagnet, when the box door of the box type transformer substation is opened, the current of an incoming line can be automatically cut off, and in addition, the reset electrification of the box type transformer substation is avoided by the mode of applying acting force, and the personnel safety is effectively ensured.

Description

Box-type substation protection device

Technical Field

The utility model relates to a transformer substation safety protection equipment technical field specifically is a box-type transformer substation protection device.

Background

The box-type substation consists of a high-voltage chamber, a transformer chamber and a low-voltage chamber, before entering the box-type substation, the power inlet circuit is ensured to be in a power-off state, to ensure the safety of personnel, and when entering, the power inlet circuit is not closed to be electrified, so as to avoid the accidental electrification of the power inlet circuit in the process of maintenance, the work is mainly carried out through manual inspection of staff and power-off operation of an incoming line, certain uncertainty exists, when the staff forgets to change the operation, there is a certain danger when entering the box-type substation, and in the process of operation, if the power inlet line is accidentally electrified, the potential safety hazard to the internal staff exists, so that the development of the box-type substation transformer substation can automatically cut off the power supply line when the staff enters the box-type substation, and the safety protection equipment ensures that the power supply line cannot be electrified accidentally, so that the problem of electric shock of staff is avoided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a box-type substation protection device, when opening box-type substation's chamber door, can automatic cutout advance electric circuit's electric current, and through the mode of applying the effort, avoid its circular telegram that resets, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a box-type substation protection device comprises a high-voltage part and a low-voltage part, wherein the high-voltage part comprises a sealed shell, N groups of movable contacts are arranged in the shell, N is more than or equal to 1, and the same number of fixed contacts are arranged at corresponding positions in the shell;

the low-voltage part comprises a fixed end and a lock tongue, the lock tongue is movably inserted into the fixed end, and a second pull type electromagnet for limiting the motion of the lock tongue is arranged in the fixed end;

when the spring bolt is inserted in the fixed end, the movable contact is electrically contacted with the fixed contact, when the spring bolt is separated from the fixed end, the movable contact is electrically isolated from the fixed contact, and when the movable contact is electrically contacted with the fixed contact, the second pull type electromagnet locks the spring bolt.

As an optimal technical scheme of the utility model, the gliding movable rod of length direction is followed to inside setting of casing, the insulating N movable contact of group of movable rod evenly sets up the surface of movable rod, the tip of movable rod sets up the first formula electro-magnet that draws along the slip direction, the inside second switch that sets up of low-pressure portion, the second switch is established ties with the first formula electro-magnet that draws, and when the spring bolt inserted, the second switch disconnection, when the spring bolt was extracted, the second switch was closed.

As an optimal technical scheme of the utility model, the movable rod surface sets up the arc wall, arc wall department sets up the gliding slider, the slip direction of slider is perpendicular with the slip direction of movable rod, set up the spring along the slip direction between slider and the casing, set up first switch between slider and the casing, first switch draws the formula electro-magnet with the second and concatenates, and when movable contact and fixed contact electric contact, the bottom contact of slider and arc wall, first switch was in the off-state this moment, and when movable contact and fixed contact separated, the slider was in the outside of arc wall, and first switch was in the on-state this moment.

As an optimal technical scheme of the utility model, the spring bolt is the insulator, the second switch includes two symmetrical arrangement and electric contact's metal spring leaf, and when the spring bolt inserted, the spring bolt was in between two metal spring leaves and with its separation.

As an optimal technical scheme of the utility model, the spring bolt surface sets up the spacing groove, the second draws the formula electro-magnet the axis perpendicular with the plug direction of spring bolt, the second draws the formula electro-magnet the tip setting and the locking piece that the spacing groove combined.

As a preferred technical scheme of the utility model, the casing outside sets up N group's leading-out terminal, the leading-out terminal is in the inside part of casing and sets up the spout, the length direction of spout is unanimous with the direction of activity of movable rod, movable contact and spout electric property sliding connection.

As a preferred technical scheme of the utility model, the casing is inside to be filled with inert gas.

As a preferred technical solution of the present invention, the low voltage part includes a third switch, the third switch is a normally-off switch, and the third switch is connected in parallel with the second switch.

Compared with the prior art, the beneficial effects of the utility model are that: this box-type substation protection device drives breaking and closure of high voltage circuit through low voltage circuit, help guaranteeing personnel's safety, and when box cabinet door is opened, can the automatic cutout high voltage power supply line, guarantee personnel's safety, and when the chamber door begins, movable contact receives the effort to pull all the time, make it can not contact with fixed contact, avoid the high voltage power supply line circular telegram, guarantee personnel's safety, and when box chamber door will be opened, if high voltage power supply line outage fails, then the lock tongue is in the locking state all the time, make the chamber door unable by being opened, avoid staff's mistake to get into, thereby avoid the electric shock.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the high-voltage end of the present invention;

FIG. 3 is a schematic view of the internal structure of the low-voltage end of the present invention;

fig. 4 is a horizontal sectional view of the high-pressure end of the present invention;

FIG. 5 is a vertical sectional view of the high-pressure end of the present invention;

FIG. 6 is a cross-sectional view of the low pressure end of the present invention;

fig. 7 is a schematic diagram of the circuit connection of the present invention.

In the figure: 1 high-voltage part, 101 outlet terminal, 102 movable rod, 103 movable contact, 104 fixed contact, 105 first pull type electromagnet, 106 sliding block, 107 spring, 108 first switch, 2 low-voltage part, 201 fixed end, 202 bolt, 203 second pull type electromagnet, 204 second switch, 205 third switch.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.

Referring to fig. 1-7, the present invention provides a technical solution: a box-type substation protection device comprises a high-voltage part 1 and a low-voltage part 2, wherein the high-voltage part 1 comprises a sealed shell, N groups of movable contacts 103 are arranged in the shell, N is more than or equal to 1, and the same number of fixed contacts 104 are arranged at corresponding positions in the shell;

the low-voltage part 2 comprises a fixed end 201 and a bolt 202, the bolt 202 is movably inserted into the fixed end 201, and a second pull type electromagnet 203 for limiting the bolt 202 to move is arranged in the fixed end 201;

when the bolt 202 is inserted into the fixed end 201, the second switch 204 is in a disconnected state, the first pull-type electromagnet 105 loses power, the movable rod 102 is in an original position, the movable contact 103 is electrically contacted with the fixed contact 104, namely, the high-voltage incoming line is electrified, and at the moment, the box-type substation is in a normal working state;

when the bolt 202 is separated from the fixed end 201, that is, the box door is opened, at this time, as the bolt 202 is pulled out, the two metal spring pieces of the second switch 204 are contacted to perform electrical combination and conduction, so that the first pull-type electromagnet 105 is electrified, the movable rod 102 is pulled to slide, and the movable contact 103 is electrically isolated from the fixed contact 104, that is, a high-voltage power-on circuit is cut off;

when the movable contact 103 is in electrical contact with the fixed contact 104, the sliding block 106 is positioned at the bottom of the arc-shaped groove under the action of the spring 107, the first switch 108 is in a disconnected state at the moment, the second pull-type electromagnet 203 is powered off and is in an original state, the locking block at the end part of the second pull-type electromagnet 203 is combined with the limiting groove of the locking tongue 202 to lock the locking tongue 202, so that the locking tongue 202 is prevented from being pulled out from the fixed end 201, the door of the refrigerator is prevented from being opened, and therefore people can enter the refrigerator by mistake.

The movable rod 102 sliding along the length direction is arranged in the shell, N groups of movable contacts 103 insulated by the movable rod 102 are uniformly arranged on the surface of the movable rod 102, a first pull-type electromagnet 105 is arranged at the end part of the movable rod 102 along the sliding direction, a second switch 204 is arranged in the low-voltage part 2, the second switch 204 is connected with the first pull-type electromagnet 105 in series, when the lock tongue 202 is inserted, the second switch 204 is disconnected, and when the lock tongue 202 is pulled out, the second switch 204 is closed.

The surface of the movable rod 102 is provided with an arc-shaped groove, the sliding block 106 is arranged at the arc-shaped groove, the sliding direction of the sliding block 106 is perpendicular to the sliding direction of the movable rod 102, a spring 107 is arranged between the sliding block 106 and the shell along the sliding direction, a first switch 108 is arranged between the sliding block 106 and the shell, the first switch 108 is connected with the second pull-type electromagnet 203 in series, when the movable contact 103 is in electrical contact with the fixed contact 104, the sliding block 106 is in contact with the bottom of the arc-shaped groove, at the moment, the first switch 108 is in an off state, when the movable contact 103 is separated from the fixed contact 104, the sliding block 106 is positioned outside the arc-shaped groove, and at the moment, the.

The latch bolt 202 is an insulator, and the second switch 204 includes two metal spring pieces that are symmetrically arranged and electrically contacted, and when the latch bolt 202 is inserted, the latch bolt 202 is located between the two metal spring pieces and separates them.

The surface of the lock tongue 202 is provided with a limit groove, the axis of the second pull type electromagnet 203 is vertical to the plugging direction of the lock tongue 202, and the end part of the second pull type electromagnet 203 is provided with a locking block combined with the limit groove.

The outside N group of leading-out terminals 101 that sets up of casing, the inside part of leading-out terminal 101 in the casing sets up the spout, and the length direction of spout is unanimous with movable rod 102's activity direction, and movable contact 103 and spout electric property sliding connection guarantee to have better electric conductive property between movable contact 103 and the leading-out terminal 101 through the sliding connection of movable contact 103 and spout.

The interior of the housing is filled with inert gas to prevent arcing when the movable contact 103 and the fixed contact 104 are separated or combined.

The low-voltage part 2 comprises a third switch 205, the third switch 205 is a normally-off switch, the third switch 205 is connected with a second switch 204 in parallel, when the door is ready to be opened, the third switch 205 is firstly switched on, the first pull type electromagnet 105 is electrified, the movable rod 102 is pulled to slide, the high-voltage power inlet circuit is cut off, the first switch 108 is driven to be electrified, the second pull type electromagnet 203 is electrified, and the lock tongue 202 is unlocked.

The pull type electromagnet is preferably the SQ 0837L pull type electromagnet produced or sold by large electromagnet Co, Inc., in Shanshan city, and can be quickly reset after power is lost, so that the pull type electromagnet has better mechanical performance.

When in use: an external high-voltage incoming line is connected with a fixed contact 104, a high-voltage wire inside a transformer substation is connected with an outgoing line end 101, a fixed end 201 is fixedly installed with a box body, a bolt 202 is fixedly installed with a box door, when the box door is opened, a third switch 205 is continuously pressed, the box door is opened until the bolt 202 is separated from the fixed end 201, the third switch 205 can be released, in the process, the third switch 205 is communicated, the first pull type electromagnet 105 is electrified, the high-voltage incoming line is cut off, in the cutting-off process, the first switch 108 is continuously closed, the second pull type electromagnet 203 is electrified, the bolt 202 is unlocked, when the bolt 202 is pulled out, the second switch 204 is closed, at the moment, even if the third switch 205 is released, the first pull type electromagnet 105 is electrified, the first pull type electromagnet 105 continuously acts on a movable rod 102, and the movable contact 103 is prevented from being combined with the fixed contact 104.

When the door is closed, the latch 202 is inserted into the fixed end, the second switch 204 is disconnected, the first pull type electromagnet 105 is powered off, the movable rod 102 is reset, the movable contact 103 is combined with the fixed contact 104, the high-voltage power inlet circuit is connected to be powered on, the sliding block 106 is reset at the moment, the first switch 108 is disconnected, the second pull type electromagnet 203 is powered off and reset, and the latch 202 is locked.

The utility model discloses a low voltage circuit drives moving of high voltage circuit and breaks and the closure, help guaranteeing personnel's safety, and when box cabinet door is opened, can the automatic cutout high pressure circuit that advances, guarantee personnel's safety, and when the chamber door begins, movable contact 103 is pulled by the effort all the time, make it can not contact with fixed contact 104, avoid the high pressure circuit that advances circular telegram, guarantee personnel's safety, and when box chamber door will be opened, if high pressure circuit that advances outage failure, then lock tongue 202 is in the locking state all the time, make the chamber door can't be opened, avoid the staff mistake to get into, thereby avoid the electric shock.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a box-type substation protection device, includes high-voltage part (1) and low-voltage part (2), its characterized in that: the high-voltage part (1) comprises a sealed shell, N groups of movable contacts (103) are arranged in the shell, N is more than or equal to 1, and the same number of fixed contacts (104) are arranged at corresponding positions in the shell;

the low-voltage part (2) comprises a fixed end (201) and a bolt (202), the bolt (202) is movably inserted into the fixed end (201), and a second pull type electromagnet (203) for limiting the bolt (202) to move is arranged in the fixed end (201);

when the bolt (202) is inserted into the fixed end (201), the movable contact (103) is electrically contacted with the fixed contact (104), when the bolt (202) is separated from the fixed end (201), the movable contact (103) is electrically isolated from the fixed contact (104), and when the movable contact (103) is electrically contacted with the fixed contact (104), the second pull type electromagnet (203) locks the bolt (202).

2. The box substation protection device of claim 1, characterized in that: the movable contact type low-voltage switch is characterized in that a movable rod (102) which slides along the length direction is arranged in the shell, N groups of insulated movable contacts (103) of the movable rod (102) are uniformly arranged on the surface of the movable rod (102), a first pull type electromagnet (105) is arranged at the end part of the movable rod (102) along the sliding direction, a second switch (204) is arranged in the low-voltage part (2), the second switch (204) is connected with the first pull type electromagnet (105) in series, when the lock tongue (202) is inserted, the second switch (204) is disconnected, and when the lock tongue (202) is pulled out, the second switch (204) is closed.

3. The box substation protection device of claim 2, characterized in that: the movable rod (102) is provided with an arc-shaped groove on the surface, a sliding block (106) is arranged at the arc-shaped groove, the sliding direction of the sliding block (106) is perpendicular to the sliding direction of the movable rod (102), a spring (107) is arranged between the sliding block (106) and the shell along the sliding direction, a first switch (108) is arranged between the sliding block (106) and the shell, the first switch (108) is connected with a second pull-type electromagnet (203) in series, when the movable contact (103) is electrically contacted with the fixed contact (104), the sliding block (106) is contacted with the bottom of the arc-shaped groove, the first switch (108) is in an open state at the moment, when the movable contact (103) is separated from the fixed contact (104), the sliding block (106) is positioned outside the arc-shaped groove, and the first switch (108) is in a closed state at the moment.

4. The box substation protection device of claim 2, characterized in that: the lock tongue (202) is an insulator, the second switch (204) comprises two metal spring pieces which are symmetrically arranged and electrically contacted, and when the lock tongue (202) is inserted, the lock tongue (202) is positioned between the two metal spring pieces and separates the two metal spring pieces.

5. The box substation protection device of claim 1, characterized in that: the surface of the lock bolt (202) is provided with a limiting groove, the axis of the second pull type electromagnet (203) is perpendicular to the plugging direction of the lock bolt (202), and the end part of the second pull type electromagnet (203) is provided with a locking block combined with the limiting groove.

6. The box substation protection device of claim 1, characterized in that: n groups of wire outlet ends (101) are arranged outside the shell, sliding grooves are formed in the portions, located inside the shell, of the wire outlet ends (101), the length direction of the sliding grooves is consistent with the moving direction of the movable rods (102), and the movable contacts (103) are electrically connected with the sliding grooves in a sliding mode.

7. The box substation protection device of claim 1, characterized in that: the interior of the shell is filled with inert gas.

8. The box substation protection device according to any one of claims 1 to 7, characterized in that: the low-voltage part (2) comprises a third switch (205), the third switch (205) is a normally-off switch, and the third switch (205) is connected with the second switch (204) in parallel.