CN215266131U

CN215266131U - Embedded zero-flying-arc-cover molded case circuit breaker

Info

Publication number: CN215266131U
Application number: CN202121450498.3U
Authority: CN
Inventors: 童孝康; 赵轶磊; 李如甲; 郁斌
Original assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Current assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-12-21
Anticipated expiration: 2031-06-29

Abstract

The utility model relates to a moulded case circuit breaker of embedded zero arc cover that flies, including embedded zero arc cover (1), circuit breaker in lid (2) and base (3), lid (2) are located base (3) top in the circuit breaker, embedded zero arc cover (1) that flies include connecting plate (11) to and a plurality of housings (12) that set up under the connecting plate, the circuit breaker in be equipped with on lid (2) with connecting plate (11) accordant connection's step face (21), lid (2) lower part and base (3) are equipped with the cavity that supplies each housing (12) embedding in the circuit breaker. Compared with the prior art, the utility model has the advantages of the size is little, the installation is maintained conveniently.

Description

Embedded zero-flying-arc-cover molded case circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to a moulded case circuit breaker of embedded zero flying arc cover is related to.

Background

When the breaker is in short-circuit breaking, because the energy of the generated electric arc is often very large, the electric arc cannot be extinguished only by an internal arc extinguish chamber of the breaker, the residual electric arc can be sprayed to a connecting terminal along an air passage, and meanwhile, a large amount of incandescent metal particles are carried, so that the insulating property of the connecting terminal is easily damaged if the residual electric arc is not treated.

The traditional method is that a terminal cover is added, a metal grid sheet is added in the terminal cover, and the metal grid sheet is used for cutting residual electric arcs and cooling electric arcs again, so that electric arcs are extinguished.

Patent CN112071714A discloses a zero arcing mounting structure of circuit breaker, including circuit breaker casing and terminal cover, it has a plurality of wiring terminal chamber to distribute in the both sides of circuit breaker casing, the terminal cover is installed on the circuit breaker casing and is covered the wiring terminal chamber, one side fretwork of every wiring terminal chamber forms the assembly opening, bottom that corresponds at the assembly opening is equipped with collapsible baffle, mounting structure still includes a plurality of protection module, every protection module includes multilayer bars piece unit and protection casing, protection casing includes the installation cavity, the installation cavity is a side open-ended box body, multilayer bars piece unit sets up in the installation cavity, collapsible baffle turns over a formation installation opening downwards along the folding line of its central authorities, the installation cavity sets up in the installation cavity. Although the utility model discloses a realize zero flashover function, safeguard function is reliable, and the customer can load and unload convenient operation by oneself. But the structure is complicated, the installation and wiring are difficult, the size is large, and the application occasion is single.

In fact, after a zero-flying arc cover of a molded case circuit breaker in the current market is connected with a circuit breaker body, the length size of the circuit breaker is increased, and the installation mode is too complicated for a customer to install, so most of the zero-flying arc cover is bound with a switch body for sale, and the zero-flying arc cover is installed by a manufacturer and then leaves the factory, so that the flexibility of production and sale is reduced; when a customer needs a zero-flying arc cover or not in different scenes, the installation mode is complex, so that the model selection and maintenance difficulty of the customer is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a small in size, installation and maintenance convenient moulded case circuit breaker of embedded zero flying arc cover in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme: the utility model provides an embedded zero plastic case circuit breaker who flies arc cover, lid and base in the arc cover, circuit breaker fly including embedded zero, the lid is located the base top in the circuit breaker, embedded zero fly arc cover include the connecting plate to and a plurality of housings that set up under the connecting plate, the circuit breaker in cover be equipped with connecting plate accordant connection's step face, the circuit breaker in the lower part of the lid be equipped with the cavity that supplies each housing embedding with the base.

Furthermore, the tops of the plurality of enclosers are all fixed on the connecting plate, the enclosers are independent from each other, and the enclosers can be respectively and independently installed and fixed on the connecting plate or can be integrally formed with the connecting plate.

Further, the housing comprises two opposite side plates and an intermediate plate located between the two side plates, wherein the outer side of each side plate is provided with a buckle, the inner side of each side plate is provided with a reinforcing rib, and the intermediate plate is provided with a plurality of grooves or holes.

Furthermore, grooves to be knocked are further arranged on two sides of the bottom of the middle plate.

Furthermore, guide surfaces are arranged on side plates on two sides of the housing.

Further, the height of the step on the upper surface of the step surface is the same as the thickness of the connecting plate.

Furthermore, the lower surface of the step surface is also provided with a guide limiting surface for guiding the housing to be embedded into the base.

Furthermore, each cavity side of the base is provided with a clamping groove which is L-shaped and is matched with the buckle.

Furthermore, the connecting plate is also provided with a hole to be knocked and a heat dissipation groove, the heat dissipation groove can be in a ring shape or a rectangle shape or other structures, and the distribution mode can be in ring distribution or parallel distribution or other structures or distributions.

Furthermore, prefabricated holes for fixing screws and mounting holes for mounting electric operators or manual operators are correspondingly arranged on the connecting plate and the step surface.

Compared with the prior art, the utility model has the advantages of it is following:

1. the sunken step surface on the circuit breaker middle cover can let embedded zero-flashover cover imbed the circuit breaker middle cover, realizes the function of zero-flashover under the condition of not increasing the height of circuit breaker.

2. The embedded zero-arcing shield breaks through the integral connection state of the top and the side of each housing of the traditional zero-arcing shield, the housings are independent of each other, only a connecting plate is designed at the top to connect the housings, on one hand, raw materials are saved, the volume is reduced, the flexibility of maintenance is increased, the housings can be respectively and independently installed and fixed on the connecting plate, the production is convenient, on the other hand, the housings and the top connecting plate can be integrally formed, on the other hand, the side of each housing is provided with a buckle structure which is matched with the groove structure of a middle cover base of the circuit breaker to limit the motion of the embedded zero-arcing shield in the horizontal direction, and simultaneously, the screw hole installation structure at the top is matched to limit the up-and-down motion of the embedded zero-arcing shield, so that the connection of the embedded zero-arcing shield and the circuit breaker is more reliable, the embedded zero-arcing shield is prevented from being blown off when the circuit breaker breaks fault current, and the embedded zero-arcing shield can be embedded into the circuit breaker body, the zero arcing function is realized under the condition that the length of the circuit breaker is not increased.

3. The hole to be punched of the embedded zero-flying arc cover is designed, when a customer uses an electric operator or a hand operator, the hole to be punched can be punched, and the electric operator or the hand operator is arranged on the surface of the circuit breaker through a fixing screw of a middle cover of the circuit breaker; when a customer uses the handle of the breaker body for operation, the hole to be knocked can be reserved, and sharp corners of the screw are prevented from discharging.

4. The design of the groove to be knocked of the embedded zero-arcing shield enables a customer to destroy the bottom of the zero-arcing shield along the groove to be knocked when selecting the front wiring of the board, so as to leave the position of the connecting row; when a customer selects plug-in wiring, the groove to be knocked of the zero flying arc cover can be reserved, and the zero flying arc capacity of the zero flying arc cover is improved.

5. The installation mode is simple, can leave the factory after, but the customer free choice to simple and convenient installation improves production efficiency.

Drawings

FIG. 1 is a schematic view of the structure of the utility model after installation;

FIG. 2 is a schematic structural view of the embedded zero-flying arc cover of the present invention;

FIG. 3 is a schematic structural view of the structure of the present invention before installation;

fig. 4 is a schematic view of a front partial structure of a middle cover of the circuit breaker of the present invention;

fig. 5 is a schematic view of a local structure of the back surface of the middle cover of the circuit breaker of the present invention;

FIG. 6 is a partial cross-sectional view of the embedded zero-arcing shield of the present invention before installation with a circuit breaker middle cover;

FIG. 7 is a cross-sectional view of the buckle of the embedded zero flying arc cover of the present invention initially entering the middle cover slot of the circuit breaker;

fig. 8 is a cross-sectional view of the entire buckle of the embedded zero flying arc cover of the present invention entering the middle cover slot of the circuit breaker;

FIG. 9 is a cross-sectional view of the embedded zero-arcing shield and the circuit breaker middle cover of the present invention after installation;

FIG. 10 is a schematic perspective view of the installation of the embedded zero-flying arc cover and the middle cover of the circuit breaker;

fig. 11 is a schematic view of an electric or manual operation of the present invention;

FIG. 12 is an enlarged view of a portion of an electric or manual operation of the present invention;

FIG. 13 is a schematic front wiring diagram of the novel board;

fig. 14 is a schematic diagram of the plug-in wiring of the present invention.

The labels in the figure are: the embedded zero-flying arc cover comprises an embedded zero-flying arc cover 1, a connecting plate 11, a hole 111 to be knocked, a heat dissipation groove 112, a cover shell 12, a side plate 121, an intermediate plate 122, a buckle 123, a reinforcing rib 124, a groove 125 to be knocked, a guide surface 126, a chamfer 127, a circuit breaker middle cover 2, a step surface 21, a guide limiting surface 211, a base 3, a clamping groove 31, a self-tapping screw 4, a handle 5, an electric operator or manual operator 6, a mounting hole 7, an inserted base 8 and a connecting bar 9.

Detailed Description

The molded case circuit breaker with embedded zero flying arc shroud of the present invention will now be described in greater detail with reference to the schematic drawings, wherein the preferred embodiments of the present invention are shown, it being understood that those skilled in the art may modify the invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

The utility model provides a moulded case circuit breaker of embedded zero arc cover, as shown in fig. 1, including embedded zero arc cover 1, circuit breaker in lid 2 and the base 3, embedded zero arc cover 1 and circuit breaker in lid 2 and the base 3 reliably are connected, can realize zero arcing function after installing on the circuit breaker, protect function is reliable, the installation can be dismantled by oneself to the customer. The concrete structure is as follows:

the embedded zero-arcing shield 1, as shown in fig. 2, includes a connecting plate 11 and a plurality of housings 12 disposed below the connecting plate, the housings 12 are independent of each other, the top portions of the housings are fixed on the connecting plate 11, a hole 111 to be knocked is disposed on the connecting plate 11, a plurality of heat dissipation grooves 112 may be further disposed, the heat dissipation grooves 112 may be in a ring shape, a rectangular shape, or other structures, and the distribution mode may be annular distribution, or parallel distribution, or other structures or distributions, in this embodiment, annular distribution. The housing 12 includes two opposite side plates 121 and an intermediate plate 122 located between the two side plates, wherein the side plate 121 is provided with a buckle 123 on the outer side and a reinforcing rib 124 on the inner side, the intermediate plate 122 is provided with a plurality of grooves or holes for heat dissipation, the two sides of the bottom of the intermediate plate 122 are further provided with grooves 125 to be knocked, and the side plates 121 on the two sides of the housing 12 are provided with guide surfaces 126.

The breaker middle cover 2 is provided with a step surface 21 which is connected with the connecting plate 11 in a matching way, the height of the step on the upper surface of the step surface 21 is the same as the thickness of the connecting plate 11, and the lower surface of the step surface 21 is also provided with a guide limiting surface 211 which guides the housing 12 to be embedded into the breaker; the lower portion of the cover 2 of the circuit breaker is fixedly connected with the base 3, the connection mode can be various modes such as screws and bolts, a plurality of cavities for embedding the housings 12 are arranged, clamping grooves 31 are formed in the side faces of the cavities of the base 3, the clamping grooves 31 are L-shaped and aim to be connected with the buckles 123 in a matching mode, the buckles 123 are also L-shaped, as shown in fig. 3-6, the embedded zero-flying arc cover 1 is not blown away by ionized gas when the circuit breaker breaks fault current, and the clamping grooves 31 and the buckles 123 are symmetrically arranged.

The connecting plate 11 and the step surface 21 are correspondingly provided with prefabricated holes for fixing screws and mounting holes 7 for mounting electric operation or manual operation.

When the embedded zero-arc flying cover is installed, the embedded zero-arc flying cover 1 is lifted, so that the guide surfaces 126 on the side plates on the two sides of the cover shell 12 abut against the guide limiting surfaces 211 on the middle cover 2 of the circuit breaker, as shown in fig. 3-5, wherein fig. 5 is a reverse view of fig. 4, fig. 7 is an installation hole for installing an electric operator or a manual operator, and the two guide surfaces are jointed, so that the embedded zero-arc flying cover 1 can play a role in guiding when the embedded zero-arc flying cover is installed; the embedded zero-flying arc cover 1 is guided to slide into the circuit breaker, the buckle 123 of the cover 12 is downwards clamped into the clamping groove 31 of the base 3, wherein the corner of the buckle 123 is provided with a chamfer or a radius which plays a role of guiding, the chamfer 127 arranged at one corner of the buckle plays a role of guiding in the embodiment, the whole buckle 123 slides in along one side of the clamping groove 31 to enter the other side of the clamping groove 31, then the embedded zero-flying arc cover 1 is pressed downwards, the buckle 123 is embedded into the clamping groove 31 to form a nested structure, the connecting plate 11 of the embedded zero-flying arc cover 1 is simultaneously embedded into the step surface 21 of the middle cover 2 of the circuit breaker, as shown in fig. 6-9, and finally the embedded zero-flying arc cover 1 is screwed into the middle cover 2 of the circuit breaker through the self-tapping screw 4 to be fixed, as shown in fig. 10.

The reinforcing ribs 124 on the housing 12 have the function of reducing the deformation of the embedded zero-arcing shield 1, so that the fasteners 123 of the embedded zero-arcing shield 1 can be more firmly clamped in the clamping grooves 31; after the embedded zero-flying arc cover 1 is installed, a hole to be knocked 111 is designed corresponding to the position of an electric operator operation installation hole 7 on the circuit breaker middle cover 2.

When a user needs to install the electric operator or the manual operator 6 (note that serial number 6 in fig. 11 is a manual operation mechanism, and an electric operator mechanism can be replaced), the hole to be knocked 111 can be punched to form a through hole, and the electric operator or the manual operator 6 and the circuit breaker are fixed by screws; when a customer selects to use the handle 5 of the breaker body for operation, the hole 111 to be knocked can be reserved, the embedded zero-flying arc cover 1 can shield the screw, and sharp-angle discharge is prevented. As shown in fig. 12, after the hole to be knocked 111 is punched, the electric operator or hand 6 is fixed to the circuit breaker through the hole to be knocked 111 and the electric operator mounting hole 7 on the circuit breaker middle cover 2.

As shown in fig. 13-14, when the customer selects the front wiring, the groove 125 to be knocked on the embedded zero-arc flying cover 1 can be damaged and then installed, so as to reserve a position for the wiring row 9; when a customer selects plug-in wiring, the conductive loop of the circuit breaker is conducted through the plug-in base 8, so that the groove 125 to be knocked of the zero flying arc shield can be reserved, and the zero flying arc capability of the embedded zero flying arc shield 1 is enhanced.

It should be noted that the use of the ordinal adjectives "left", "right", "upper", "lower", etc., to describe a common object or orientation, merely indicate that different instances of like objects are being referred to, and are not intended to imply that the objects so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. The utility model provides an embedded zero plastic case circuit breaker who flies arc cover, includes that embedded zero flies arc cover (1), circuit breaker in lid (2) and base (3), lid (2) are located base (3) top in the circuit breaker, a serial communication port, embedded zero fly arc cover (1) including connecting plate (11) to and a plurality of housing (12) that set up under the connecting plate, circuit breaker in be equipped with on lid (2) with connecting plate (11) accordant connection's step face (21), lid (2) lower part and base (3) are equipped with the cavity that supplies each housing (12) embedding in the circuit breaker.

2. The molded case circuit breaker with embedded zero flying arc shield as claimed in claim 1, wherein a plurality of top portions of the case (12) are fixed on the connection plate (11).

3. The molded case circuit breaker with embedded zero flying arc shield as claimed in claim 1 or 2, wherein the housing (12) comprises two opposite side plates (121) and a middle plate (122) connecting the two side plates in the middle, wherein the side plates (121) are provided with a buckle (123) at the outer side and a reinforcing rib (124) at the inner side, and the middle plate (122) is provided with a plurality of slots or holes.

4. The molded case circuit breaker with embedded zero flying arc cover as claimed in claim 3, wherein the middle plate (122) is further provided with a groove (125) to be knocked on both sides of the bottom thereof.

5. The molded case circuit breaker with embedded zero flying arc cover as claimed in claim 3, wherein the side plates (121) of the housing (12) are provided with guide surfaces (126).

6. The molded case circuit breaker with built-in zero flying arc cover according to claim 1, wherein the step height of the upper surface of the step surface (21) is the same as the thickness of the connecting plate (11).

7. The molded case circuit breaker with embedded zero flying arc cover as claimed in claim 1, wherein the lower surface of the step surface (21) is further provided with a guide limiting surface (211) for guiding the housing (12) to be embedded into the circuit breaker.

8. The molded case circuit breaker with embedded zero flying arc cover as claimed in claim 3, wherein the base (3) has a slot (31) on each cavity side, the slot (31) is L-shaped and matches with the buckle (123).

9. The molded case circuit breaker with embedded zero flying arc cover as claimed in claim 1, wherein the connecting plate (11) is further provided with a hole (111) to be knocked and a heat sink (112).

10. The molded case circuit breaker with embedded zero flying arc cover according to claim 1, wherein the connecting plate (11) and the step surface (21) are correspondingly provided with a preformed hole for screw fixation and a mounting hole for mounting electric operation or hand operation.