CN213520775U - Ring main unit - Google Patents

Abstract

The utility model discloses a ring main unit, which comprises a main body; the isolation switch is arranged on the cabinet body and comprises three closing areas; and the partition plate is connected to the isolating switch and used for separating two adjacent closing areas. A partition plate is arranged in a closing area of the isolating switch, so that electric arcs in the closing area cannot jump and shoot each other; and the set partition plate increases the creepage distance of a closing area, reduces the influence of creepage on the isolating switch and ensures safety. The closing area refers to an area of the disconnecting switch, which is used for contacting with the circuit breaker, because the disconnecting switch is provided with three terminals, which are used for connecting three phase lines, so that the three terminals are close to each other, and an electric arc of one terminal easily passes to an adjacent terminal during power failure, thereby causing burn; under the condition of no partition plate, the creepage phenomenon of a closing area is obvious, and a circuit is interfered; the arrangement of the partition plate can prolong the creepage distance and weaken the creepage phenomenon.

Description

Ring main unit

Technical Field

The utility model relates to a switch board technical field, in particular to looped netowrk cabinet.

Background

The ring main unit is mainly applied to an electric power system and used for distributing electricity, and an isolating switch is arranged in the ring main unit and used for cutting off a circuit.

The isolating switch in the ring main unit is generally a three-phase isolating switch, can be connected with three live wires in a three-phase circuit and is provided with three switching-on positions, and electric arcs generated on one switching-on position often jump to the adjacent switching-on position to cause safety accidents.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a looped netowrk cabinet can prevent the electric arc drunkenness.

According to the utility model discloses a looped netowrk cabinet of first aspect embodiment, including the cabinet body; the isolation switch is arranged on the cabinet body and comprises three closing areas; and the partition plate is connected to the isolating switch and used for separating two adjacent switching-on areas.

According to the utility model discloses looped netowrk cabinet has following beneficial effect at least: the partition plate is arranged in the closing area of the isolating switch, so that electric arcs in the closing area cannot be shot by each other; and the arranged partition plate increases the creepage distance of the closing area, reduces the influence of creepage on the isolating switch and ensures safety.

According to the utility model discloses a some embodiments, isolator can dismantle the connection the cabinet body, convenient dismantlement and installation meet isolator trouble back, are convenient for change.

According to the utility model discloses a some embodiments still include the circuit breaker, the circuit breaker is connected the cabinet body, isolator is used for connecting the circuit breaker sets up the electric arc that the circuit breaker is used for eliminating load current and produces can also protect circuit and equipment simultaneously.

According to some embodiments of the utility model, isolator includes the casing, rotates the connection the pivot and the connection of casing the plug-in strip of pivot, the pivot is used for the drive the disconnection of plug-in strip or connection circuit breaker, the rotation type isolator convenient operation, working range is little, isolator occupies that space is little, also easy to assemble.

According to some embodiments of the utility model, be provided with ground contact on the casing, ground contact corresponds the plug-in strip sets up, sets up ground contact is convenient plug-in strip ground connection guarantees safety.

According to the utility model discloses a some embodiments, the output of circuit breaker is provided with the fixture block, be provided with on the casing with the bayonet socket that the fixture block corresponds, the fixture block inserts the bayonet socket makes the circuit breaker with isolator connects firmly, and it is right to conveniently resist external force the circuit breaker with isolator's influence.

According to some embodiments of the utility model, the baffle is provided with dodges the breach, dodge the breach and be used for dodging the casing sets up dodge the breach and can avoid the pivot prevents the pivot with the collision and the interference of baffle.

According to the utility model discloses a some embodiments, the profile of dodging the breach sets up to the arc, facilitates the cooperation installation the pivot.

According to some embodiments of the present invention, the cabinet body is made of stainless steel, the surface of the cabinet body is provided with an insulating layer, and the cabinet body made of stainless steel has strong oxidation resistance and corrosion resistance; the insulating layer arranged on the surface of the cabinet body can ensure the safety of operators and prevent electric shock accidents.

According to some embodiments of the utility model, the baffle covers has epoxy layer, sets up epoxy layer can prevent that electric arc from puncturing or burning the baffle.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a ring main unit according to an embodiment of the present invention;

fig. 2 is a first schematic structural diagram of the connection between the disconnecting switch and the circuit breaker of the ring main unit shown in fig. 1;

fig. 3 is a schematic structural diagram ii of connection between the disconnecting switch and the circuit breaker of the ring main unit shown in fig. 1.

The switch cabinet comprises a cabinet body 100, a disconnecting switch 200, a closing area 210, a partition 300, a circuit breaker 400, a shell 220, a rotating shaft 230, a knife switch 240, a grounding contact 221, a fixture block 410, a bayonet 222, an avoiding notch 310 and an epoxy resin layer 320.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., 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 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.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the present number, and the terms greater than, less than, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 3, a ring main unit includes a main body 100; the disconnecting switch 200 is arranged on the cabinet body 100, and the disconnecting switch 200 comprises three closing zones 210; and a partition 300 connected to the disconnecting switch 200 for partitioning two adjacent closing regions 210. A partition plate 300 is arranged in the closing area 210 of the isolating switch 200, so that electric arcs in the closing area 210 cannot be shot into each other; and the arranged partition plate 300 increases the creepage distance of the closing area 210, reduces the influence of creepage on the isolating switch 200 and ensures safety. It is understood that the closing zone 210 refers to an area of the disconnector 200 for contacting the circuit breaker 400, because the disconnector 200 has three terminals for connecting three phase lines, and thus the three terminals are close to each other, and an arc of one of the terminals easily passes to an adjacent terminal during power failure, causing a burn; in addition, under the condition that the partition plate 300 is not arranged, the creepage phenomenon of the closing area 210 is obvious, and a line is interfered; the arrangement of the partition plate 300 can prolong the creepage distance and weaken the creepage phenomenon; it is understood that creepage refers to a phenomenon that when the performance of the insulating material is reduced, the charged metal part and the insulating material generate a water wave-like arc to climb along the surface of the insulating material due to external factors such as weather, high air humidity, rainy season in the cloudy days, humid environment, and the like.

In some embodiments, the isolating switch 200 is detachably connected to the cabinet 100, so that the isolating switch is convenient to detach and install, and is convenient to replace after the isolating switch 200 fails; it can be understood that the disconnecting switch 200 detachably connected to the cabinet 100 can also be conveniently produced separately, and is convenient to install when being installed.

In some embodiments, the circuit breaker 400 is further included, the circuit breaker 400 is connected to the cabinet 100, the disconnecting switch 200 is used for connecting the circuit breaker 400, the circuit breaker 400 is configured to eliminate an arc generated by a load current, and simultaneously protect a circuit and equipment, it can be understood that the disconnecting switch 200 is connected in series with the circuit breaker 400, because three closing zones 210 are provided on the disconnecting switch 200, the circuit breaker 400 is also configured to be three, and on a three-phase line, each phase line is connected with the circuit breaker 400, and then three output ends of the three circuit breakers 400 respectively correspond to the three closing zones 210 of the disconnecting switch 200.

In some embodiments, the isolating switch 200 includes a housing 220, a rotating shaft 230 rotatably connected to the housing 220, and a blade 240 connected to the rotating shaft 230, where the rotating shaft 230 is used to drive the blade 240 to disconnect or connect the circuit breaker 400, the rotary isolating switch 200 is convenient to operate, has a small working range, the isolating switch 200 occupies a small space, and is also convenient to install, it can be understood that the rotating shaft 230 is rotated to drive the blade 240 to close or open, so as to make the circuit be connected, such a way of closing and opening is simple, and the blade 240 can rotate synchronously with the rotating shaft 230, so as to facilitate the simultaneous connection of three circuit breakers 400.

In some embodiments, the housing 220 is provided with a ground contact 221, the ground contact 221 is disposed corresponding to the knife switch 240, and the ground contact 221 is disposed to facilitate grounding of the knife switch 240, so as to ensure safety, it should be noted that when the rotating shaft 230 is rotated, three output ends of three circuit breakers 400 can be contacted to achieve the purpose of closing, and when opening is required, the rotating shaft 230 is rotated reversely to contact the rotating shaft 230 and the ground contact 221, so as to ensure safety.

In some embodiments, a fixture block 410 is disposed at an output end of the circuit breaker 400, a bayonet 222 corresponding to the fixture block 410 is disposed on the housing 220, and the fixture block 410 is inserted into the bayonet 222, so that the circuit breaker 400 and the disconnector 200 are stably connected, and the circuit breaker 400 and the disconnector 200 are conveniently resistant to external force.

In some embodiments, the profile of the latch 410 is configured as a polygon, and the profile of the bayonet 222 is configured as a shape that mates with the latch 410. It is understood that the polygonal sides include three or more sides, and the contour of the latch 410 refers to a contour of the insertion end of the latch 410 with the insertion direction of the latch 410 as a viewing angle.

In some embodiments, the partition 300 is provided with an avoiding gap 310, the avoiding gap 310 is used for avoiding the housing 220, and the avoiding gap 310 can avoid the rotating shaft 230, so as to prevent collision and interference between the rotating shaft 230 and the partition 300.

In some embodiments, the relief notch 310 is contoured to be arcuate to facilitate mating with the mounting shaft 230.

In some embodiments, the cabinet 100 is made of stainless steel, the surface of the cabinet 100 is provided with an insulating layer, and the cabinet 100 made of stainless steel has strong oxidation resistance and corrosion resistance; the insulating layer arranged on the surface of the cabinet body 100 can ensure the safety of operators and prevent electric shock accidents. It will be appreciated that the insulating layer may be a PET layer, a polyethylene layer or a PP layer.

In some embodiments, the separator 300 is covered with an epoxy layer 320, the epoxy layer 320 being provided to prevent arcing from breaking down or burning the separator 300.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. A ring main unit, comprising:

a cabinet (100);

the isolation switch (200) is arranged on the cabinet body (100), and the isolation switch (200) comprises three closing zones (210);

and the partition plate (300) is connected to the isolating switch (200) and is used for separating two adjacent closing areas (210).

2. The ring main unit according to claim 1, wherein: the isolating switch (200) is detachably connected with the cabinet body (100).

3. The ring main unit according to claim 1, wherein: still include circuit breaker (400), circuit breaker (400) are connected the cabinet body (100), isolator (200) are used for connecting circuit breaker (400).

4. The ring main unit according to claim 3, wherein: the isolating switch (200) comprises a shell (220), a rotating shaft (230) and a knife switch (240), wherein the rotating shaft (230) is rotatably connected with the shell (220), the knife switch (230) is connected with the rotating shaft (230), and the rotating shaft (230) is used for driving the knife switch (240) to be disconnected or connected with the circuit breaker (400).

5. The ring main unit according to claim 4, wherein: the shell (220) is provided with a grounding contact (221), and the grounding contact (221) is arranged corresponding to the knife switch (240).

6. The ring main unit according to claim 4, wherein: the output end of the circuit breaker (400) is provided with a clamping block (410), the shell (220) is provided with a bayonet (222) corresponding to the clamping block (410), and the clamping block (410) is inserted into the bayonet (222).

7. The ring main unit according to any one of claims 4 to 6, wherein: the partition plate (300) is provided with an avoiding gap (310), and the avoiding gap (310) is used for avoiding the shell (220).

8. The ring main unit according to claim 7, wherein: the profile of the avoiding notch (310) is set to be arc-shaped.

9. The ring main unit according to claim 1, wherein: the cabinet body (100) is made of stainless steel, and an insulating layer is arranged on the surface of the cabinet body (100).

10. The ring main unit according to claim 1, wherein: the separator (300) is covered with an epoxy layer (320).

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