Electronic molded case circuit breaker

Abstract

The utility model discloses an electronic molded case circuit breaker, which comprises a base, an upper cover detachably mounted at the top of the base, an arc extinguish chamber mounted inside the base and an arc baffle arranged on one side of the arc extinguish chamber, a plurality of wiring terminals are arranged on the base, round holes corresponding to the wiring terminals are formed in the upper cover in a penetrating manner, and the arc baffle is arranged on one side of the arc extinguish chamber. A limiting groove is formed between the base and the upper cover, a baffle is installed inside the limiting groove, an annular concave part is formed in one side of the baffle, a front blocking cover is installed on the front side of the base and the front side of the upper cover, and a rear blocking cover is installed on the rear side of the base and the rear side of the upper cover. According to the circuit breaker, dust is prevented from being accumulated on the wiring terminals, the conductivity of the wiring terminals is reduced, circuit connection is not stable, stable operation of the circuit breaker is ensured, secondary arc extinguishing can be conducted on electric arcs flying out of the base through the arc extinguishing grid pieces, and safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely is a kind of electronic moulded case circuit breaker. BACKGROUND

[0002] Electronic moulded case circuit breaker is a kind of circuit breaker of integrated electronic monitoring and control technology, mainly used in low-voltage distribution system to accurately protect overload, short circuit, leakage and other faults, compared with traditional thermal magnetic circuit breaker has higher sensitivity and functionality.

[0003] The wiring terminal of existing electronic moulded case circuit breaker is usually exposed, a large amount of dust is accumulated after long time use, dust accumulation can cause the conductivity of wiring terminal to decline, cause circuit connection to be unstable, even produce arc or local overheating, seriously trigger circuit breaker trip. SUMMARY

[0004] The utility model aims at providing a kind of electronic moulded case circuit breaker to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of electronic moulded case circuit breaker, including base, detachably installed on the top of base upper cover, installed in the base interior arc-extinguishing chamber and the arc baffle of setting in arc-extinguishing chamber side, the base is equipped with a plurality of wiring terminals, the upper cover is penetrated and is equipped with the round hole corresponding with the wiring terminal, the base and upper cover are equipped with limit slot, the limit slot is installed with baffle, the side of baffle is equipped with annular recess, the front side of base and upper cover is installed with front baffle cover, the rear side of base and upper cover is installed with rear baffle cover, the side of front baffle cover and rear baffle cover is integrally formed with dust shield for shielding wiring terminal, the inner side wall of rear baffle cover is equipped with a plurality of equidistant distribution arc-extinguishing grid, the side of rear baffle cover is equipped with horizontal slot, the baffle is respectively equipped with vertical slot and through-hole.

[0006] As a preferred scheme of the utility model, the side of front baffle cover and rear baffle cover is equipped with plug rod, the outside of plug rod is equipped with protrusion, the base and upper cover are equipped with second insertion slot matched with the plug rod.

[0007] As a preferred scheme of the utility model, the bottom of plug rod is equipped with inclined plane.

[0008] As a preferred scheme of the utility model, the side of front baffle cover and rear baffle cover is equipped with first insertion slot, the inside of first insertion slot is installed with arc separation plate.

[0009] As a preferred scheme of the utility model, the side of rear baffle cover is equipped with fixed cylinder.

[0010] As a preferred scheme of the utility model, the top of the upper cover is provided with an identification corresponding to the wiring terminal.

[0011] As a preferred scheme of the utility model, a plurality of notches are equidistantly formed on one side of the dust shield plate.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the front cover, the rear cover, the dust shield plate and the baffle can shield the wiring terminal, prevent dust from accumulating on the wiring terminal, cause the wiring terminal to have poor conductivity and cause unstable circuit connection, so as to ensure stable operation of the circuit breaker, and the arc flying out of the base can be subjected to secondary arc extinguishing through the arc extinguishing grid, so that the safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0014] Figure 2 It is a structure schematic view of the arc isolation plate, the front cover and the rear cover after being disassembled;

[0015] Figure 3 It is a structure schematic view of the utility model when the baffle is not installed;

[0016] Figure 4 It is a structure schematic view of the inside of the bottom shell;

[0017] Figure 5 It is a structure schematic view of the front cover of the utility model;

[0018] Figure 6 It is a structure schematic view of the rear cover of the utility model;

[0019] Figure 7 It is a structure schematic view of the rear side of the rear cover of the utility model;

[0020] Figure 8 It is a structure schematic view of the arc isolation plate of the utility model.

[0021] In the drawing: 1, base; 2, upper cover; 3, front cover; 4, rear cover; 5, arc isolation plate; 6, baffle; 7, identification; 8, first slot; 9, wiring terminal; 10, arc extinguishing chamber; 11, arc isolation plate; 12, dust shield plate; 13, notch; 14, protrusion; 15, insertion rod; 16, inclined surface; 17, transverse slot; 18, fixed cylinder; 19, arc extinguishing grid; 20, vertical slot; 21, through hole; 22, limiting groove; 23, second slot; 24, round hole; 25, annular recess. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made belong to the scope of protection of the present application.

[0023] Please refer to Figures 1 to 8 The utility model provides a technical scheme: an electronic moulded case circuit breaker, including base 1, detachable installation in the top of base 1 upper cover 2, install in the inside of base 1 arc extinguishing chamber 10 and set up in the arc baffle 11 of arc extinguishing chamber 10 one side, arc baffle 11 is used for blocking the arc that flies out of arc extinguishing chamber 10, so that arc is not easy to fly out to the outside of base 1, be equipped with a plurality of terminal 9 on base 1, the upper cover 2 is provided with round hole 24 corresponding with terminal 9, round hole 24 is convenient for staff to screw the screw on terminal 9, and the external wire is wired, the limit slot 22 for limiting the baffle 6 is set up between base 1 and upper cover 2, the limit slot 22 is used to limit the baffle 6 to realize the fixation of baffle 6, the baffle 6 is installed in the inside of limit slot 22, and the one side of baffle 6 is provided with annular recess 25, baffle 6 is used for shielding terminal 9, prevents terminal 9 from being contaminated in the transportation process, and also can block dust from falling on terminal 9 in use, the material of baffle 6 is insulating plastic, in the process of wiring, baffle 6 is broken along annular recess 25 to facilitate wiring, the front side of base 1 and upper cover 2 is installed with front baffle 3, and the height of baffle 6 close to arc extinguishing chamber 10 is lower, so that baffle 6 top and upper cover 2 have a certain gap, so as to facilitate arc extinguishing chamber 10 to heat dissipation, the rear side of base 1 and upper cover 2 is installed with rear baffle 4, and the one side of front baffle 3 and rear baffle 4 is integrally formed with dust shield plate 12 for shielding terminal 9, dust shield plate 12 shields round hole 24, prevents dust from falling on terminal 9 through round hole 24, causes the conductivity of terminal 9 to drop, causes the unstable circuit connection, the inner side wall of rear baffle 4 is equipped with a plurality of equidistant distribution arc extinguishing louver 19, and arc extinguishing louver 19 can carry out secondary arc extinguishing to the arc that flies out of base 1, avoids the arc from flying to the external environment, thereby improves security, the one side of rear baffle 4 is provided with horizontal slot 17, and the upper cover 2 is provided with vertical slot 20 and through hole 21 respectively, the horizontal slot 17, vertical slot 20 and through hole 21 are set up so as to facilitate arc extinguishing chamber 10 to emit heat to the external environment, avoids the influence of arc extinguishing chamber 10 temperature being too high on its arc extinguishing capacity.

[0024] Wherein, the front cover 3 and the rear cover 4 are provided with the insertion rod 15 on one side, the outer side of the insertion rod 15 is provided with the protrusion 14, the base 1 and the upper cover 2 are provided with the second insertion slot 23 matched with the insertion rod 15, the insertion rod 15 is inserted into the second insertion slot 23 to realize the fixation of the front cover 3 and the rear cover 4, and the protrusion 14 can increase the friction between the insertion rod 15 and the second insertion slot 23, so that the front cover 3 and the rear cover 4 are installed more firmly.

[0025] Wherein, the bottom of the insertion rod 15 is provided with the inclined surface 16, the inclined surface 16 makes the insertion rod 15 more easily inserted into the second insertion slot 23.

[0026] Wherein, the front cover 3 and the rear cover 4 are provided with the first insertion slot 8 on one side, the side of the arc baffle 5 is inserted into the first insertion slot 8 to realize the fixation of the arc baffle 5, the first insertion slot 8 is internally provided with the arc baffle 5, and the arc baffle 5 is used for blocking the diffusion of the electric arc to prevent the equipment from being damaged due to high temperature of the electric arc.

[0027] Wherein, the rear cover 4 is provided with the fixing cylinder 18 on one side, the fixing cylinder 18 is used for being inserted into the circular hole 24, so that the rear cover 4 is installed more firmly.

[0028] Wherein, the top of the upper cover 2 is provided with the mark 7 corresponding to the wiring terminal 9, and the mark 7 is used for indicating the information of the wiring terminal 9.

[0029] Wherein, the dust shield 12 is provided with a plurality of notches 13 equidistantly on one side, and the notches 13 are used for avoiding the mark 7, so as to avoid the mark 7 being shielded by the dust shield 12, so as to facilitate the staff to observe the mark 7.

[0030] Specifically, in use, the front cover 3 and the rear cover 4 are first taken off, then the baffle 6 is poked through along the annular recess 25 by using a tool, the external wire is connected with the wiring terminal 9 by penetrating through the baffle 6, after the connection is completed, the front cover 3 and the rear cover 4 are taken, the insertion rod 15 is inserted into the second insertion slot 23 in alignment, so as to install and fix the front cover 3 and the rear cover 4, and in the use process, the rear cover 4, the front cover 3, the dust shield 12 and the baffle 6 can shield the wiring terminal 9 to prevent the dust from falling on the wiring terminal 9, when the electric arc is generated by the on-off of the circuit breaker, the electric arc enters the arc extinguishing chamber 10 to be extinguished, the electric arc partially flying out of the arc extinguishing chamber 10 is blocked by the arc baffle 11, even if there is still a part of the electric arc flying out of the base 1, the arc baffle 19 can perform secondary arc extinguishing on the electric arc, so as to avoid the electric arc flying to the external environment, thereby improving the safety.

[0031] In the description of the utility model, need understanding is, the term "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as a restriction on the utility model.

[0032] In addition, the terms "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features limited by "first", "second", "third", "fourth" can be explicitly or implicitly include at least one of the features.

[0033] In the utility model, unless otherwise expressly provided and limited, the terms "installation", "arrangement", "connection", "fixing", "screw connection" and so on should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrated, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise expressly limited, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. An electronic molded case circuit breaker, comprising a base (1), an upper cover (2) detachably mounted on the top of the base (1), an arc extinguishing chamber (10) mounted in the interior of the base (1), and an arc baffle (11) arranged on one side of the arc extinguishing chamber (10), a plurality of wiring terminals (9) being provided on the base (1), and a circular hole (24) corresponding to the wiring terminals (9) being provided through the upper cover (2), characterized in that: The base (1) and the upper cover (2) are provided with a limiting groove (22), the inside of the limiting groove (22) is provided with a baffle (6), one side of the baffle (6) is provided with an annular recess (25), the front side of the base (1) and the upper cover (2) is provided with a front baffle cover (3), the rear side of the base (1) and the upper cover (2) is provided with a rear baffle cover (4), one side of the front baffle cover (3) and the rear baffle cover (4) is integrally provided with a dust shield (12) for shielding the wire terminal (9), the inner side wall of the rear baffle cover (4) is provided with a plurality of arc extinguishing fins (19) distributed at equal intervals, one side of the rear baffle cover (4) is provided with a horizontal slot (17), the arc shielding plate (11) is respectively provided with a vertical slot (20) and a through hole (21).

2. The electronic molded case circuit breaker of claim 1, wherein: One side of the front baffle cover (3) and the rear baffle cover (4) is provided with a plug rod (15), the outer side of the plug rod (15) is provided with a protrusion (14), the base (1) and the upper cover (2) are provided with a second insertion groove (23) matched with the plug rod (15).

3. The electronic molded case circuit breaker of claim 2, wherein: The bottom of the plug rod (15) is provided with an inclined surface (16).

4. The electronic molded case circuit breaker of claim 1, wherein: One side of the front baffle cover (3) and the rear baffle cover (4) is provided with a first insertion groove (8), the inside of the first insertion groove (8) is provided with an arc separation plate (5).

5. The electronic molded case circuit breaker of claim 1, wherein: One side of the rear baffle cover (4) is provided with a fixing cylinder (18).

6. The electronic molded case circuit breaker of claim 1, wherein: The top of the upper cover (2) is provided with an identification (7) corresponding to the wire terminal (9).

7. The electronic molded case circuit breaker of claim 1, wherein: One side of the dust shield (12) is provided with a plurality of notches (13) distributed at equal intervals.

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