CN217822543U

CN217822543U - Pole-mounted circuit breaker with protection function

Info

Publication number: CN217822543U
Application number: CN202221389162.5U
Authority: CN
Inventors: 熊正萍; 薛阳
Original assignee: Nanjing Ziqiang Railway Vehicle Parts Co ltd
Current assignee: Nanjing Ziqiang Railway Vehicle Parts Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-11-15
Anticipated expiration: 2032-06-06

Abstract

The utility model discloses a circuit breaker on post with protect function, including the airtight insulating casing of pottery, the end cover is decided to the top fixedly connected with that is located the airtight insulating casing of pottery in the airtight insulating casing of pottery, the quiet end guide arm of inner wall fixedly connected with of end cover, the bottom fixedly connected with that the inner wall of the airtight insulating casing of pottery is located the airtight insulating casing of pottery moves the end cover, moves the end guide arm that has cup jointed in the inner wall activity of moving the end cover, moves the inside fixedly connected with stainless steel bellows that the lateral wall of end guide arm is located the airtight insulating casing of pottery, the utility model relates to a circuit breaker on post with protect function, move the end guide arm and upwards impel the contact subassembly that drives moving end guide arm top and the contact subassembly contact of quiet end guide arm bottom when the contact is closed in the isolator control arc extinguish chamber in the circuit breaker, when two contact subassemblies collide, the main contact moves down in the inside of moving the end guide arm, cushions through the elasticity of bradyseism spring.

Description

Pole-mounted circuit breaker with protection function

Technical Field

The utility model relates to a circuit breaker, in particular to circuit breaker on post with protect function.

Background

The pole-mounted circuit breaker is a circuit breaker installed and operated on an electric pole, can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, a motor and the like, and can automatically cut off a circuit when serious overload or short circuit, undervoltage and other faults occur, the functions of the circuit breaker are equivalent to the combination of a fuse type switch, an over-and-under-heat relay and the like, and the pole-mounted circuit breaker comprises an arc extinguish chamber, a mechanism box, a current transformer, a voltage transformer and a disconnecting switch.

Wherein the explosion chamber is around the contact of switch for the device that limits electric arc spatial position and quicken electric arc and extinguish, current explosion chamber has some defects:

one is as follows: the breaker controls the opening and closing of contacts in the arc extinguish chamber through the isolating switch, when the two contacts in the arc extinguish chamber are closed, the moving contact can be lifted upwards to be attached to the static contact, so that the two contacts are closed, and in the process, the moving contact can be collided with the static contact, and the contact can be damaged;

secondly, can produce electric arc in the twinkling of an eye when two contacts separation in the circuit breaker arc-extinguishing chamber, this process can produce high temperature, and the electric arc and the temperature that produce all can cause the influence to the contact, make the life-span of contact cut short.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circuit breaker on post with protect function to the electric arc that the contact striking had damage, the interior contact disconnection of arc extinguish chamber produced has the problem of damage to the contact in having the damage to the tup in solving the arc extinguish chamber that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a circuit breaker on post with protect function, includes ceramic airtight insulation shell, the end cover board is decided to the top fixedly connected with that the interior of ceramic airtight insulation shell is located ceramic airtight insulation shell, the quiet end guide arm of inner wall fixedly connected with of end cover board, the bottom fixedly connected with that the inner wall of ceramic airtight insulation shell is located ceramic airtight insulation shell moves the end cover board, the inner wall activity of moving the end cover board has cup jointed moves the end guide arm, the lateral wall that moves the end guide arm is located the inside fixedly connected with corrugated steel pipe of ceramic airtight insulation shell, corrugated steel pipe's bottom and the top fixed connection of moving the end cover board, quiet end guide arm has cup jointed the contact subassembly with the equal activity of looks remote site of moving the end guide arm, the contact subassembly is including first spacing ring, move the first spacing ring of end guide arm inner wall fixedly connected with of top fixedly connected with of end guide arm, the inner wall activity of first spacing ring has cup jointed the main contact, the bottom position that the lateral wall of main contact is close to the main contact is located the inside fixedly connected with first spacing ring of moving the end guide arm, the inside fixedly connected with electrically conductive inner core of inner wall, the bottom of moving the hole position of guide arm has seted up the conductive hole, the spring connection inner wall of the bottom of the bradyseism guide arm and the bottom of the fixed connection spring.

As a preferred technical scheme of the utility model, the top position fixedly connected with pottery roof that the inner wall of pottery airtight insulation shell is close to pottery airtight insulation shell, the bottom of pottery roof is located the electrically conductive pull wire of the equal fixedly connected with in both sides position of quiet end guide arm, the bottom vertical position of electrically conductive pull wire is located middle part between two contact subassemblies.

As an optimized technical scheme of the utility model, electrically conductive pull wire is the heliciform.

As an optimal technical scheme of the utility model, the bottom and the contact subassembly contactless of electrically conductive pull wire, electrically conductive pull wire and quiet end guide arm contactless.

As an optimal technical scheme of the utility model, the lateral wall of electrically conductive inner core and the laminating of a hole inslot wall of moving end guide arm inside.

As an optimal technical scheme of the utility model, the lateral wall of second spacing ring and the inner wall laminating of moving end guide arm.

As a preferred technical scheme of the utility model, main contact is in first spacing ring inner chamber position clearance fit.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses moving end guide arm upwards impels when contact is closed in isolator control arc extinguish chamber in the circuit breaker and drives the contact subassembly on moving end guide arm top and the contact subassembly contact of quiet end guide arm bottom, when two contact subassemblies collide, the main contact moves down in the inside of moving end guide arm, cushion through the elasticity of bradyseism spring, after two contact subassemblies contact, carry out current transmission through electrically conductive inner core, be favorable to two contact closed backs in the arc extinguish chamber, avoid two contact subassembly violent collisions to lead to the contact subassembly to take place to damage.

2. The utility model discloses can produce electric arc after the disconnection of contact in the arc extinguish chamber, after electric arc produced between two contact subassemblies, electric conductivity through electrically conductive pull wire can pull the electric arc after the difference, electrically conductive pull wire pulls the back electric current with electric arc and transmits on electrically conductive pull wire, the insulating nature through ceramic roof avoids the electric current to exert an influence to the interior electric elements of arc extinguish chamber, be favorable to the electric arc that produces between the contact, can be by the traction department, avoid electric arc to cause the influence to make its life-span loss to the contact in the arc extinguish chamber.

Drawings

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

fig. 2 is a schematic cross-sectional view of the ceramic top plate shown in fig. 1 according to the present invention;

fig. 3 is a schematic structural view of the contact assembly shown in fig. 2 according to the present invention.

In the figure: 1. a ceramic hermetic insulating housing; 2. fixing end cover plates; 3. a stationary end guide rod; 4. a movable end cover plate; 5. a stainless steel bellows; 6. a movable end guide rod; 7. a contact assembly; 8. a ceramic top plate; 9. a conductive pull wire; 71. a cushioning spring; 72. a first limit ring; 73. a main contact; 74. a conductive inner core; 75. a second limit ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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 efforts all belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution of a pole-mounted circuit breaker with protection function:

the first embodiment is as follows:

as shown in fig. 1, 2 and 3, a pole-mounted circuit breaker with protection function comprises a ceramic airtight insulating housing 1, and is characterized in that: a fixed end cover plate 2 is fixedly connected with the top end of the ceramic airtight insulating shell 1 in the ceramic airtight insulating shell 1, a static end guide rod 3 is fixedly connected with the inner wall of the fixed end cover plate 2, a movable end cover plate 4 is fixedly connected with the inner wall of the ceramic airtight insulating shell 1 at the bottom end of the ceramic airtight insulating shell 1, a movable end guide rod 6 is movably sleeved on the inner wall of the movable end cover plate 4, a stainless steel corrugated pipe 5 is fixedly connected with the side wall of the movable end guide rod 6 at the inner part of the ceramic airtight insulating shell 1, the bottom of the stainless steel corrugated pipe 5 is fixedly connected with the top part of the movable end cover plate 4, the opposite ends of the static end guide rod 3 and the movable end guide rod 6 are movably sleeved with a contact assembly 7, the contact assembly 7 comprises a first limit ring 72, the top end of the movable end guide rod 6 close to the movable end guide rod 6 is fixedly connected with a first limit ring 72, and the inner wall of the first limit ring 72 is movably sleeved with a main contact 73, the side wall of the main contact 73 is close to the bottom end position of the main contact 73, the side wall is positioned in the movable end guide rod 6 and is fixedly connected with a first limiting ring 72, the inside of the main contact 73 is fixedly connected with a conductive inner core 74, the bottom position of the inner wall of the movable end guide rod 6 is provided with a first hole groove, the conductive inner core 74 is inserted into the first hole groove of the inner wall of the movable end guide rod 6, the inside of the movable end guide rod 6 is provided with a shock absorption spring 71, the top end of the shock absorption spring 71 is fixedly connected with the bottom of a second limiting ring 75, the bottom end of the shock absorption spring 71 is fixedly connected with the bottom of the inner wall of the movable end guide rod 6, the side wall of the conductive inner core 74 is attached to the inner wall of the first hole groove in the movable end guide rod 6, the conductive inner core 74 is attached to the movable end guide rod 6 to transmit current to the movable end guide rod 6, poor contact is avoided, the side wall of the second limiting ring 75 is attached to the inner wall of the movable end guide rod 6, the situation that the main contact 73 shakes during displacement can be avoided, the main contact 73 is in clearance fit with the inner cavity of the first limiting ring 72, and the phenomenon that the friction force of the main contact 73 is too large and the mechanical loss is increased during movement is avoided.

When specifically using, the utility model relates to a circuit breaker on post with protect function moves end guide arm 6 and upwards impels the contact assembly 7 that drives the contact assembly 7 on 6 tops of end guide arm and the contact assembly 7 contact of 3 bottoms of quiet end guide arm when the contact is closed in isolator control arc extinguish chamber in the circuit breaker, when two contact assemblies 7 collide, main contact 73 moves down in the inside of moving end guide arm 6, cushion through the elasticity of bradyseism spring 71, after two contact assemblies 7 contact, carry out current transmission through electrically conductive inner core 74.

Example two:

on the basis of the first embodiment, as shown in fig. 1 and fig. 2, a ceramic top plate 8 is fixedly connected to the inner wall of the ceramic airtight insulating housing 1 near the top end of the ceramic airtight insulating housing 1, conductive pull wires 9 are fixedly connected to both sides of the ceramic top plate 8 located on the stationary end guide rod 3, the bottom vertical position of each conductive pull wire 9 is located in the middle between the two contact assemblies 7, the conductive pull wires 9 are spirally formed to increase the line length of the conductive pull wires 9, so that the loss of an electric arc led out through the conductive pull wires 9 is increased, the bottom ends of the conductive pull wires 9 are not in contact with the contact assemblies 7, the conductive pull wires 9 are not in contact with the stationary end guide rod 3, the influence of the conductive pull wires 9 on current transmission after the two contact assemblies 7 are closed is avoided, and the conductive pull wires 9 are prevented from being clamped by the two contact assemblies 7 when the two contact assemblies 7 are closed to break the conductive pull wires 9.

When specifically using, the utility model relates to a circuit breaker on post with protect function can produce electric arc after the contact disconnection in the arc extinguish chamber, and after electric arc produced between two contact assemblies 7, the electric arc after can will being poor can be drawn through the electric conductivity of electrically conductive pull wire 9, and electrically conductive pull wire 9 draws back electric current with electric arc and transmits on electrically conductive pull wire 9, and the insulating nature of passing through ceramic roof 8 avoids the electric current to produce the influence to the electric elements in the arc extinguish chamber.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate medium, and may be used for communicating the inside of two elements or for interacting with each other, unless otherwise specifically defined, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to the specific circumstances.

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 circuit breaker on post with protect function, includes ceramic airtight insulating casing (1), its characterized in that: a fixed end cover plate (2) is fixedly connected to the top end of the ceramic airtight insulating shell (1) inside the ceramic airtight insulating shell (1), a fixed end guide rod (3) is fixedly connected to the inner wall of the fixed end cover plate (2), a movable end cover plate (4) is fixedly connected to the bottom end of the ceramic airtight insulating shell (1) on the inner wall of the ceramic airtight insulating shell (1), a movable end guide rod (6) is movably sleeved on the inner wall of the movable end cover plate (4), a stainless steel corrugated pipe (5) is fixedly connected to the inner side wall of the movable end guide rod (6) inside the ceramic airtight insulating shell (1), the bottom of the stainless steel corrugated pipe (5) is fixedly connected to the top of the movable end cover plate (4), and contact assemblies (7) are movably sleeved on opposite ends of the fixed end guide rod (3) and the movable end guide rod (6);

the contact assembly (7) comprises a first limiting ring (72), the top end of the inner wall of the movable end guide rod (6) close to the movable end guide rod (6) is fixedly connected with the first limiting ring (72), the inner wall of the first limiting ring (72) is movably sleeved with a main contact (73), the bottom end of the side wall of the main contact (73) close to the main contact (73) is located in the first limiting ring (72) of the inner fixed connection of the movable end guide rod (6), the conductive inner core (74) of the inner fixed connection of the main contact (73), a hole groove is formed in the bottom position of the inner wall of the movable end guide rod (6), the conductive inner core (74) is inserted into the hole groove I of the inner wall of the movable end guide rod (6), a cushioning spring (71) is arranged inside the movable end guide rod (6), the top end of the cushioning spring (71) is fixedly connected with the bottom of the second limiting ring (75), and the bottom end of the cushioning spring (71) is fixedly connected with the bottom of the inner wall of the movable end guide rod (6).

2. The pole-mounted circuit breaker with protection function of claim 1, characterized in that: the inner wall of the ceramic airtight insulating shell (1) is close to the ceramic top position fixedly connected with ceramic top plate (8) of the ceramic airtight insulating shell (1), the bottom of the ceramic top plate (8) is located on the two sides of the static end guide rod (3) and is fixedly connected with a conductive pull wire (9), and the bottom vertical position of the conductive pull wire (9) is located in the middle between the two contact assemblies (7).

3. The pole-mounted circuit breaker with protection function of claim 2, characterized in that: the conductive traction wire (9) is spiral.

4. The pole-mounted circuit breaker with protection function of claim 2, characterized in that: the bottom end of the conductive traction wire (9) is not in contact with the contact assembly (7), and the conductive traction wire (9) is not in contact with the static end guide rod (3).

5. The pole-mounted circuit breaker with protection function of claim 1, wherein: the side wall of the conductive inner core (74) is attached to the inner wall of the first hole groove in the movable end guide rod (6).

6. The pole-mounted circuit breaker with protection function of claim 1, characterized in that: the side wall of the second limiting ring (75) is attached to the inner wall of the movable end guide rod (6).

7. The pole-mounted circuit breaker with protection function of claim 1, wherein: the main contact (73) is in clearance fit at the position of the inner cavity of the first limit ring (72).