CN213242440U

CN213242440U - Wiring terminal protective cover of circuit breaker

Info

Publication number: CN213242440U
Application number: CN202022124455.8U
Authority: CN
Inventors: 王以盾; 黎佳财; 潘超
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-05-18
Anticipated expiration: 2030-09-24

Abstract

A wiring terminal protective cover of a circuit breaker comprises a protective cover body, wherein a fixing structure and an arc extinguishing structure are arranged on the protective cover body, the fixing structure comprises a plurality of plugboards and a knob assembly, the plugboards are in splicing fit with a circuit breaker shell, the protective cover body is divided into a plurality of separated spaces corresponding to wiring terminals by the plugboards, each separated space is provided with an exhaust port and a wiring port, and the knob assembly is matched with the circuit breaker shell to fix the protective cover body on the circuit breaker shell; the arc extinguishing structure sets up in the separate space and relative with the gas vent, and the arc extinguishing structure includes arc extinguishing bars piece and arc isolating component, and the arc extinguishing bars piece covers on the gas vent and be equipped with a plurality of exhaust holes on the arc extinguishing bars piece, and the arc isolating component sets up the one side that is close to the circuit breaker casing at the arc extinguishing bars piece, and the arc isolating component has the flow clearance and makes electric arc extinguish by the arc extinguishing structure through changing electric arc flow direction. The utility model discloses the mounting means is swift convenient, can realize zero electric arc departure, prevents to be burnt out.

Description

Wiring terminal protective cover of circuit breaker

Technical Field

The utility model relates to a low pressure moulded case circuit breaker, concretely relates to binding post protection casing of circuit breaker.

Background

There are a variety of circuit breakers in which a molded case circuit breaker employs a plastic case insulator to isolate a portion between conductors or ground metal. In general use, can all install protection casing or picture peg in moulded case circuit breaker's binding post position and prevent that the excessive performance stability who influences whole power supply system of electric arc that produces of circuit breaker in the course of the work to the protection casing of circuit breaker can also promote the effect of protection, alternate insulating properties, assembly high efficiency, the whole harmony of outward appearance of product. But current protection casing is installed through the spacing groove cooperation of product body or screw fixation, can't realize simple and easy efficient assembly to be in at product body and protection casing cooperation and do not have any arc extinguishing measure, in case the circuit breaker working process discharge arc is too big will overflow from the gap of both sides wall and upper end and can burn through protection casing or picture peg and lead to the circuit breaker to damage even.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a binding post protection casing simple structure, that the reliability is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a wiring terminal protective cover of a circuit breaker comprises protective cover bodies arranged on two sides of a circuit breaker shell, wherein a fixing structure and an arc extinguishing structure are arranged on one side, close to a wiring terminal of the circuit breaker, of each protective cover body; the arc extinguishing structure sets up in the partitioned space and relative with the gas vent, and the arc extinguishing structure includes arc extinguishing bars piece and arc isolating component, the arc extinguishing bars piece covers on the gas vent and be equipped with a plurality of exhaust holes on the arc extinguishing bars piece, and the arc isolating component sets up the one side that is close to the circuit breaker casing at the arc extinguishing bars piece, and the arc isolating component has the clearance of flowing and makes electric arc extinguish by the arc extinguishing structure through changing electric arc flow direction.

Further, the arc separation assembly comprises a plurality of arc separation columns arranged at intervals, the arc separation columns are arranged at intervals to form a plurality of rows, and the arc separation columns in two adjacent rows are staggered and opposite.

Further, the arc isolation column comprises a first arc isolation column and a second arc isolation column, the first arc isolation column is located on one side close to the arc extinguishing grid piece, and the second arc isolation column is arranged on one side far away from the arc extinguishing grid piece.

Further, the arc separation assembly comprises an arc separation frame, the arc separation frame comprises an integrally formed base plate and first arc separation columns, the base plate is provided with through holes used for fixing the arc separation assembly on the protective cover body, the first arc separation columns are arranged on the base plate and used for changing the flowing direction of the electric arc, and gaps between every two adjacent first arc separation columns serve as flowing gaps for the electric arc to flow.

Further, the arc separation assembly comprises a plurality of second arc separation columns arranged on the protective cover body, the second arc separation columns are arranged at intervals, and a gap for electric arc to flow is reserved between every two adjacent second arc separation columns.

Furthermore, at least one of the second arc isolating columns is used as a connecting column, a connecting hole is formed in the middle of the connecting column, and a connecting screw is assembled in the connecting hole and used for being matched and connected with the arc isolating frame of the arc isolating assembly.

Further, fixed knot constructs including the knob subassembly, the knob subassembly is through fixing the protection casing body in the both sides of circuit breaker casing with circuit breaker casing cooperation.

Further, the knob subassembly includes knob and cardboard, is equipped with the through-hole that supplies the knob to rotate the installation on the upper portion of protection casing body, and outside the through-hole was stretched out at the both ends of knob, was equipped with spacing portion in the one end of knob, sets up the cardboard at the other end of knob, and the edge of protection casing body and circuit breaker casing can stretch into in the clearance between cardboard and the spacing portion, makes protection casing body and circuit breaker casing together fixed under the clamp and crowded effect of clamp of cardboard and spacing portion.

Further, the upper portion of protection casing body is equipped with the gas vent of rectangle, and the edge on protection casing body upper portion extends to the direction of circuit breaker casing and forms the connecting wall is equipped with the through-hole that supplies the knob subassembly installation, is equipped with one row of interval arrangement's second at the connecting wall and the relative one side of gas vent and separates the arc post, installs the arc frame that separates the arc structure in the space between second separates the arc post and the exhaust hole the lower part of protection casing body is equipped with uncovered wiring mouth down.

Further, be equipped with a plurality of picture pegs in one side that the protection casing body is close to the circuit breaker casing be equipped with the spacing groove that supplies the arc extinguishing bars piece installation on the lateral wall of picture peg, be equipped with spacing portion on the arc extinguishing bars piece, make the arc extinguishing bars piece by spacing installation on the protection casing body under the cooperation of spacing groove and spacing portion.

Further, shown picture peg and protection casing body integrated into one piece, the edge that the picture peg is close to circuit breaker casing one side is equipped with blunt round bulge, blunt round bulge be used for with set up the spacing cooperation of slot on circuit breaker casing, the outside extension in one side that circuit breaker casing was kept away from to the picture peg forms the baffle, the baffle is used for separating two adjacent binding post.

The utility model discloses a binding post protection casing of circuit breaker, fix the protection casing body in the both sides of the circuit breaker casing through the fixed knot structure; in addition, the gas vent of protection casing body has been covered with the arc extinguishing bars piece, is provided with the arc isolating subassembly in one side that the arc extinguishing bars piece is close to the circuit breaker casing, and the arc isolating subassembly makes electric arc extinguish by arc extinguishing structure completely through changing electric arc flow direction, realizes zero electric arc departure, prevents that the protection casing from being burnt through.

In addition, the arc isolation assembly comprises a plurality of arc isolation columns which are arranged at intervals, and the second arc isolation column in the arc isolation columns is used for fixing the arc isolation frame in the arc isolation assembly on the protective cover body while changing the arc direction, so that the stability of the arc isolation assembly is ensured, and the space in the protective cover body is saved.

Drawings

Fig. 1-2 are schematic views illustrating the installation of a terminal protective cover of a circuit breaker according to the present invention;

fig. 3-5 are schematic structural views of a terminal protection cover of a circuit breaker according to the present invention;

fig. 6-8 are cross-sectional views of a terminal shield for a circuit breaker according to the present invention;

fig. 9 is a schematic structural view of a shield body in a terminal shield of a circuit breaker according to the present invention;

fig. 10 is a schematic view of the structure in the terminal protection cover of the circuit breaker of the present invention;

fig. 11 is a schematic structural diagram of a circuit breaker housing in a terminal shield of the circuit breaker.

Detailed Description

The following describes a specific embodiment of a terminal protection cover of a circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 11. The utility model discloses a binding post protection casing of circuit breaker is not limited to the description of following embodiment.

A wiring terminal protective cover of a circuit breaker comprises protective cover bodies 1 arranged on two sides of a circuit breaker shell a, wherein one side, close to a wiring terminal of the circuit breaker, of each protective cover body 1 is provided with a fixing structure and an arc extinguishing structure, each fixing structure comprises a plurality of inserting plates 2, each inserting plate 2 can be in inserting fit with the circuit breaker shell a, the plurality of inserting plates 2 divide the protective cover body 1 into a plurality of separated spaces corresponding to the wiring terminal, and each separated space is provided with an exhaust port 11 and a wiring port 12; the arc extinguishing structure sets up in the partitioned space and relative with gas vent 11, and the arc extinguishing structure includes arc extinguishing bars piece 4 and separates the arc subassembly, arc extinguishing bars piece 4 covers on gas vent 11 and is equipped with a plurality of exhaust holes 41 on arc extinguishing bars piece 4, separates the one side that the arc subassembly setting is close to circuit breaker casing a at arc extinguishing bars piece 4, separates the arc subassembly and has the flow clearance and makes electric arc extinguish by the arc extinguishing structure through changing electric arc flow direction.

The utility model discloses a wiring terminal protective cover of a circuit breaker, which fixes a protective cover body 1 on two sides of a circuit breaker shell a through a plug board 2 of a fixed structure and a knob component 3; in addition, the exhaust port 11 of the protective cover body 1 covers the arc extinguishing grid pieces 4, one side of each arc extinguishing grid piece 4 close to the circuit breaker shell a is provided with an arc isolating component, the arc isolating components enable electric arcs to be completely extinguished by the arc extinguishing structure through changing the flowing direction of the electric arcs, zero electric arc flying out is achieved, and the protective cover is prevented from being burnt through.

An embodiment of a terminal protection cover of a circuit breaker is provided with reference to fig. 1-11, the protection cover includes a protection cover body 1, the protection cover body 1 is disposed at two sides of a circuit breaker casing a, a fixing structure and an arc extinguishing structure are disposed at one side of the protection cover body 1 close to the circuit breaker casing a, the fixing structure includes a plurality of insertion plates 2 and a knob assembly 3, the insertion plates 2 can be inserted and matched with the circuit breaker casing a, preferably, slots a1 shown in fig. 11 are disposed at two sides of the circuit breaker casing a, the insertion plates 2 are inserted and matched with the slots a1 to enable the protection cover body 1 to be installed at two sides of the circuit breaker casing a, and the protection cover body 1 is divided into a plurality of separated spaces corresponding to the terminals (not shown) by the plurality of insertion plates 2, an exhaust port 11 and a wiring port 12 are disposed at each separated space, the wiring port 12 is used for wiring operation; the rotary knob assembly 3 is matched with the breaker shell a to fix the protective cover body 1 on two sides of the breaker shell a, the edge of the breaker shell a is matched with the rotary knob assembly 3 preferably, and the protective cover body 1 is fixedly connected with the breaker shell a in a rotary clamping mode. The arc extinguishing structure sets up in the separate space and relative with gas vent 11, and the arc extinguishing structure includes arc extinguishing bars piece 4 and separates the arc subassembly, arc extinguishing bars piece 4 covers on gas vent 11 and is equipped with a plurality of exhaust holes 41 on arc extinguishing bars piece 4, separates the one side that the arc subassembly setting is close to circuit breaker casing a at arc extinguishing bars piece 4, separates the arc subassembly and has the flow clearance and makes electric arc extinguish by the arc extinguishing structure through changing electric arc flow direction, realizes zero electric arc and discharges, prevents that protection casing body 1 from being burnt through.

The rotary knob assembly 3 comprises a rotary knob 31 and a clamping plate 32, a through hole for the rotary knob 31 to be rotatably installed is arranged at the upper part of the protective cover body 1, two ends of the rotary knob 31 extend out of the through hole, a limiting part is arranged at one end of the rotary knob 31, the clamping plate 32 is arranged at the other end of the rotary knob 31, the edges of the protective cover body 1 and the breaker shell a can extend into a gap between the clamping plate 32 and the limiting part, the protective cover body 1 and the breaker shell a are fixed together under the clamping action of the clamping plate 32 and the limiting part, preferably, as shown in figures 3, 5 and 7, the limiting part is formed by extending the side wall at one end of the rotary knob 31 outwards along the radial direction, an indicating mark is arranged on the end face of the limiting part and used for indicating the state of the rotary knob assembly 3 at the moment, the clamping plate 32 is in a circular plate-shaped structure with, when the sector is fitted to the lower side of the edge of the circuit breaker case a, the shield body 1 is clamped with the circuit breaker case a, the knob assembly 3 shows a locked state, and when the sector is not fitted to the lower side of the edge of the circuit breaker case a, the knob assembly 3 shows an unlocked state. The fixing structure adopts the assembling process of the inserting plate 2 and the knob component 3 to be more rapid and convenient than the existing installing mode, and can be fixed in a non-knob mode.

The arc separation assembly comprises a plurality of arc separation columns arranged at intervals, the arc separation columns are arranged at intervals to form a plurality of rows, the adjacent two rows of arc separation columns are opposite in dislocation, each arc separation column comprises a first arc separation column 51 and a second arc separation column 14, the first arc separation column 51 is located on one side close to the arc extinguishing grid piece 4, and the second arc separation column 14 is arranged on one side far away from the arc extinguishing grid piece 4.

The arc separation assembly comprises an arc separation frame 5 and a connecting wall 13 of the protective cover body 1, the arc separation frame 5 is fixedly connected with the connecting wall 13, the arc separation frame 5 is connected with the connecting wall 13 in a matched mode to enable the arc extinguishing grid piece 4 to be fixed on the protective cover body 1, preferably, the first arc separation column 51 is arranged on the arc separation frame 5 in the arc separation assembly, and the second arc separation column 14 is arranged on the connecting wall 13 of the protective cover body 1. As shown in fig. 5, 6 and 10, the arc isolating frame 5 includes a base plate 52 and first arc isolating columns 51 which are integrally formed, a through hole 521 for fixing the arc isolating assembly on the shield body 1 is formed on the base plate 52, the first arc isolating columns 51 are disposed on the base plate 52 for changing the flow direction of the arc, a gap between two adjacent first arc isolating columns 51 is used as a flow gap for the arc to flow, the first arc isolating columns 51 shown in fig. 6 and 10 are two rows, the first arc isolating columns 51 in two adjacent rows are staggered and opposite, so as to change the flow direction of the arc sufficiently and prevent the arc from flying straight out of the shield body 1, similarly, a plurality of second arc isolating columns 14 disposed on the shield body 1 are also arranged at intervals, a gap for the arc to flow is left between two adjacent second arc isolating columns 14, as shown in fig. 6, the curve is a flow path of the arc, so that the arc is completely extinguished in the arc extinguishing structure, zero arc discharge is achieved. In this embodiment, the second arc-isolating columns 14 are only arranged in a single row, and the end portions of the second arc-isolating columns 14 can pass through the through holes 521 on the bottom plate 52, so as to achieve the fixed connection between the arc-isolating frame 5 and the shield body 1, preferably, the diameter of the end portions of the second arc-isolating columns 14 is smaller than the diameter of the middle portions of the second arc-isolating columns 14, which is beneficial for the end portions of the second arc-isolating columns 14 to be connected with the through holes 521 in a matching manner, and at least one of the second arc-isolating columns 14 serves as a connecting column 15, a connecting hole is arranged in the middle portion of the connecting column 15, a connecting screw is assembled in the connecting hole for being connected with the arc-isolating frame 5 of the arc-isolating assembly in a matching manner, and at this time, the through holes 521 arranged on the bottom plate 52.

In connection with fig. 5, 8 and 9, an embodiment of the shield body 1 is provided, wherein a rectangular exhaust port 11 is provided at the upper portion of the shield body 1, the edge of the upper portion of the shield body 1 extends toward the circuit breaker housing a to form a connecting wall 13, through holes for mounting the knob assembly 3 are provided on the connecting wall 13, preferably, the through holes are provided at the connecting wall 13 near the edge of the circuit breaker housing a1, the number of the connecting walls 13 shown in the figure corresponds to the number of the divided spaces, and the through holes are provided at the connecting walls 13 at both sides. A row of second arc-isolating columns 14 which are arranged at intervals are arranged on one side of the connecting wall 13 opposite to the exhaust port 11, an arc-isolating frame 5 with an arc-isolating structure is arranged in a space between the second arc-isolating columns 14 and the exhaust hole 41, the second arc-isolating columns 14 which are positioned in the middle position in the drawing are used as connecting columns 15, the diameter of the connecting columns 15 is larger than that of the second arc-isolating columns 14, and connecting holes which are provided with screws are arranged in the middle of the connecting columns 15 and used for fixing the arc-isolating frames on the protective cover body 1; the lower part of the protective cover body 1 is provided with a wiring port 12 with a downward opening. Be equipped with a plurality of picture pegs 2 in one side that protection casing body 1 is close to circuit breaker casing a, in this embodiment, picture peg 2 is separated for three partition space protection casing body 1 is close to circuit breaker casing a one side be equipped with the spacing groove 21 that supplies the installation of arc extinguishing bars piece 4 on picture peg 2's the lateral wall, be equipped with spacing portion on arc extinguishing bars piece 4, make arc extinguishing bars piece 4 by spacing installation on protection casing body 1 under the cooperation of spacing groove 21 and spacing portion, preferably as shown in fig. 5, with the setting that spacing groove 21 corresponds in the both sides of gas vent 11. In this implementation, protection casing body 1 and picture peg 2 integrated into one piece, picture peg 2 are used for being provided with blunt round bulge with slot a1 complex edge for limiting protection casing body 1 to the direction motion of keeping away from circuit breaker casing a when cooperating with slot a1, and one side that circuit breaker casing a was kept away from to picture peg 2 extends to the outside of protection casing and forms baffle 6, baffle 6 is used for separating two adjacent binding post with picture peg 2 relatively, and in addition, is equipped with a plurality of wiring mouths 12 in protection casing body 1's lower part, wiring mouth 12 corresponds respectively and separates the space setting, and every wiring mouth 12 is opening down uncovered, and in this embodiment, the figure of wiring mouth 12 is three.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a binding post protection casing of circuit breaker which characterized in that: the protective cover comprises protective cover bodies (1) arranged on two sides of a breaker shell (a), wherein one side, close to a wiring terminal of the breaker, of each protective cover body (1) is provided with a fixing structure and an arc extinguishing structure, each fixing structure comprises a plurality of inserting plates (2), each inserting plate (2) can be in inserting fit with the breaker shell (a), the plurality of inserting plates (2) divide the protective cover body (1) into a plurality of separated spaces corresponding to the wiring terminal, and each separated space is provided with an exhaust port (11) and a wiring port (12); the arc extinguishing structure sets up in the partitioned space and relative with gas vent (11), and the arc extinguishing structure includes arc extinguishing bars piece (4) and separates the arc subassembly, arc extinguishing bars piece (4) cover on gas vent (11) and be equipped with a plurality of exhaust holes (41) on arc extinguishing bars piece (4), separate the one side that the arc subassembly setting is close to circuit breaker casing (a) in arc extinguishing bars piece (4), separate the arc subassembly have the flow clearance and make electric arc extinguish by the arc extinguishing structure through changing electric arc flow direction.

2. A terminal protection shield for a circuit breaker according to claim 1, wherein: the arc separation assembly comprises a plurality of arc separation columns which are arranged at intervals, the arc separation columns are arranged at intervals to form a plurality of rows, and the arc separation columns in two adjacent rows are staggered and opposite.

3. A terminal protection shield for a circuit breaker according to claim 2, wherein: the arc isolating column comprises a first arc isolating column (51) and a second arc isolating column (14), the first arc isolating column (51) is located on one side close to the arc extinguishing grid piece (4), and the second arc isolating column (14) is arranged on one side far away from the arc extinguishing grid piece (4).

4. A terminal protection shield for a circuit breaker according to claim 1, wherein: the arc separation assembly comprises an arc separation frame (5), the arc separation frame (5) comprises an integrally formed bottom plate (52) and first arc separation columns (51), a through hole (521) for fixing the arc separation assembly on the protective cover body (1) is formed in the bottom plate (52), the first arc separation columns (51) are arranged on the bottom plate (52) and used for changing the flowing direction of an electric arc, and a gap between every two adjacent first arc separation columns (51) serves as a flowing gap for the electric arc to flow.

5. A terminal protection shield for a circuit breaker according to claim 1, wherein: the arc isolating assembly comprises a plurality of second arc isolating columns (14) arranged on the protective cover body (1), the second arc isolating columns (14) are arranged at intervals, and a gap for electric arc to flow is reserved between every two adjacent second arc isolating columns (14).

6. The terminal protection cover of a circuit breaker according to claim 5, wherein: at least one of the second arc isolating columns (14) is used as a connecting column (15), a connecting hole is formed in the middle of the connecting column (15), and a connecting screw is assembled in the connecting hole and used for being matched and connected with an arc isolating frame (5) of the arc isolating assembly.

7. A terminal protection shield for a circuit breaker according to claim 1, wherein: the fixed knot constructs including knob subassembly (3), knob subassembly (3) are through fixing protection casing body (1) in the both sides of circuit breaker casing (a) with circuit breaker casing (a) cooperation.

8. The terminal protection cover of a circuit breaker according to claim 7, wherein: knob subassembly (3) are including knob (31) and cardboard (32), be equipped with the through-hole that supplies knob (31) to rotate the installation on the upper portion of protection casing body (1), the both ends of knob (31) stretch out outside the through-hole, one end at knob (31) is equipped with spacing portion, set up cardboard (32) at the other end of knob (31), the edge of protection casing body (1) and circuit breaker casing (a) can stretch into in the clearance between cardboard (32) and the spacing portion, make protection casing body (1) and circuit breaker casing (a) fixed together under the effect of the clamp of cardboard (32) and spacing portion crowded.

9. A terminal protection shield for a circuit breaker according to claim 1, wherein: the upper portion of protection casing body (1) is equipped with gas vent (11) of rectangle, and the edge on protection casing body (1) upper portion extends to the direction of circuit breaker casing (a) and forms connecting wall (13) are equipped with the through-hole that supplies knob subassembly (3) to install, are equipped with one row of interval arrangement's second at connecting wall (13) and gas vent (11) relative one side and separate arc post (14), install in the space between second separate arc post (14) and exhaust hole (41) and separate arc frame (5) that separate the arc structure the lower part of protection casing body (1) is equipped with uncovered wiring mouth (12) down.

10. A terminal protection shield for a circuit breaker according to claim 9, wherein: be equipped with a plurality of picture peg (2) in one side that protection casing body (1) is close to circuit breaker casing (a) be equipped with spacing groove (21) that supply arc extinguishing bars piece (4) to install on the lateral wall of picture peg (2), be equipped with spacing portion on arc extinguishing bars piece (4), make arc extinguishing bars piece (4) by spacing installation on protection casing body (1) under spacing groove (21) and the cooperation of spacing portion.

11. A terminal protection shield for a circuit breaker according to claim 1, wherein: the edge that picture peg (2) is close to circuit breaker casing (a) one side is equipped with blunt round arch with protection casing body (1) integrated into one piece, picture peg (2), blunt round arch be used for with set up slot (a1) spacing cooperation on circuit breaker casing (a), one side that circuit breaker casing (a) was kept away from in picture peg (2) outwards extends and forms baffle (6), baffle (6) are used for separating two adjacent binding post.