Modularized molded case circuit breaker

Abstract

The utility model discloses a modularized molded case circuit breaker, which comprises a base, a middle cover and a mutual inductor module, the base is internally provided with a plurality of spaced cavities formed by spacing partition walls and mutual inductor mounting cavities communicated with the spaced cavities, and mutual inductor modules are arranged in the mutual inductor mounting cavities; the middle cover is provided with a module insertion cavity above the mutual inductor installation cavity, and the bottom of the module insertion cavity is provided with a communication port; a circuit board module is arranged at the upper part of the mutual inductor module, the circuit board module comprises a mounting seat and a circuit board mounted in the mounting seat, the mounting seat seals the communication port, an upward plug connector I is arranged at the communication port on the circuit board, and a plug connector II is arranged at the bottom of the functional module. According to the utility model, through optimization design, the modularized molded case circuit breaker structure can effectively reduce impact damage of high-heat gas to the functional module, thereby being beneficial to improving the use performance and prolonging the service life of the molded case circuit breaker.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely relates to a modularization plastic -clad circuit breaker. BACKGROUND

[0002] The plastic -clad circuit breaker is a kind of electrical equipment, its function is in monitoring abnormal current in circuit and automatically cutting off circuit, to protect electrical equipment and personal safety.Usually, various functional modules are arranged in the plastic -clad circuit breaker to improve its functionality.These functional modules contain various electronic components, and the installation cavity of functional module is generally communicated with the inner cavity of base. However, when the circuit breaker breaks, the arc generated by the separation of moving contact and static contact releases a large amount of high-temperature gas, which can cause the high-temperature gas to diffuse in the bottom shell and enter the installation cavity to damage the electronic components in the functional module, and the high-temperature gas can also impact the functional module to cause the functional module to loosen, thereby negatively affecting the service life and performance of the plastic -clad circuit breaker. SUMMARY

[0003] To this end, the utility model discloses a modularization plastic -clad circuit breaker, which can effectively reduce the adverse effects of high-temperature gas on functional modules through structural optimization.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] The utility model provides a modularization plastic -clad circuit breaker, including base, middle cover and mutual inductor module, the base has several phase interval cavities formed by phase interval wall and mutual inductor installation cavity communicated with phase interval cavity, the mutual inductor installation cavity is equipped with mutual inductor module, the middle cover is equipped with the module insertion cavity for the functional module to be loaded in the upper side of mutual inductor installation cavity, the module insertion cavity bottom is equipped with the communicating port, the upper part of mutual inductor module is equipped with circuit board module, and the circuit board module includes mounting seat and circuit board in the mounting seat, the mounting seat seals the communicating port, and the circuit board is equipped with the upward plug connector one at the communicating port, and the functional module bottom has the plug connector two suitable for the plug matching of plug connector one.

[0006] In further technical scheme, the mounting seat has mounting groove with opening upward, the circuit board is loaded in mounting groove, and the limit plate is pressed on the upper side of circuit board, and the limit plate is fixedly connected with the mounting seat, and the limit plate is equipped with the avoiding port for the plug connector one to pass through.

[0007] In further technical scheme, the side wall of mounting groove is equipped with a plurality of clamping ports, and the side of limit plate is equipped with a plurality of clamping blocks corresponding to the clamping port.

[0008] In a further technical solution, the periphery of the mounting base is provided with an upwardly protruding baffle 1 and an outwardly protruding baffle 2, the lower side of the baffle 2 abuts the upper end edge of the base, the lower end surface of the communication port is attached to the upper side of the baffle 2, and the shape of the baffle 1 matches the shape of the edge of the communication port and protrudes upward along the edge wall of the communication port.

[0009] In a further technical solution, the upper part of the base is formed with a recess, and the baffle 2 is embedded in the recess.

[0010] In a further technical solution, the mounting base is integrally provided with a downwardly extending baffle, the baffle is inserted into the phase spacing cavity, and the surface of the baffle is perpendicular to the length direction of the phase spacing cavity.

[0011] In a further technical solution, a notch is provided at the opening of the upper end edge of the module insertion cavity.

[0012] In a further technical solution, each phase spacing cavity is provided with an arc-extinguishing chamber installation area at one end away from the mutual inductor installation cavity, and two opposite air baffles are provided on the side of each arc-extinguishing chamber installation area close to the mutual inductor installation cavity, the two air baffles are close to each other and form a moving contact passage between them.

[0013] In a further technical solution, a buckle 1 is provided on the mounting base, a buckle 2 is provided on the mutual inductor module, and the buckle 1 and the buckle 2 are in clamping and matching connection.

[0014] The modular molded case circuit breaker structure of the utility model has the following advantages: the modular molded case circuit breaker structure is optimized, the functional modules can be easily plugged into and pulled out of the module insertion cavity, the communication port is closed by the mounting base, high-temperature gas is prevented from entering the module insertion cavity through the communication port, the functional modules are not affected by the impact of high-temperature gas, and the use performance and service life of the modular molded case circuit breaker are improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings used in the specific embodiment description. In the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn according to the actual proportions.

[0016] Figure 1 The structure diagram of the modular molded case circuit breaker in the utility model;

[0017] Figure 2 The structure diagram of the modular molded case circuit breaker in the utility model; Figure 1 The structure diagram of the modular molded case circuit breaker in the utility model;

[0018] Figure 3 It is the explosion view of the modular plastic shell circuit breaker in the utility model;

[0019] Figure 4 It is the structural schematic view of the base in the utility model;

[0020] Figure 5 It is the structural schematic view of the circuit board module in the utility model;

[0021] Figure 6 It is Figure 5 It is the structural schematic view of the circuit board module in the utility model;

[0022] The mark in the figure is: 1-base; 10-embedded slot; 11-phase interval wall; 12-phase interval cavity; 120-arc extinguishing chamber installation area; 121-air baffle; 122-moving contact passage; 13-mutual inductor installation cavity; 14-module insertion cavity; 140-communication port; 141-slot; 2-middle cover; 3-mutual inductor module; 31-buckle two; 4-function module; 5-circuit board module; 51-mounting seat; 510-buckle one; 511-mounting groove; 512-clamp; 513-stop edge one; 514-stop edge two; 52-circuit board; 53-inserting piece one; 54-limiting plate; 541-avoidance port; 542-clamp block. DETAILED DESCRIPTION

[0023] The embodiments of the technical scheme of the utility model are described in detail below in combination with the drawings. The following embodiments are only used for more clearly illustrating the technical scheme of the utility model, therefore only as an example, cannot limit the protection scope of the utility model by this.

[0024] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be the usual meaning understood by the technical personnel in the field to which the utility model belongs.

[0025] The structure of the modular plastic shell circuit breaker in the utility model embodiment is as shown in Figures 1 to 6As shown, including the base 1, the middle cover 2 and the transformer module 3; the base 1 has several phase spacing cavities 12 formed by phase spacing walls 11 and a transformer installation cavity 13 communicated with the phase spacing cavities 12, the transformer installation cavity 13 is provided with the transformer module 3; the middle cover 2 is provided with a module insertion cavity 14 for the functional module 4 above the transformer installation cavity 13, the bottom of the module insertion cavity 14 is provided with a communication port 140; the functional module 4 of the embodiment can be a carrier module, a control module, or other functional modules. More specifically, the upper part of the transformer module 3 is provided with a circuit board module 5, the circuit board module 5 includes a mounting seat 51 and a circuit board 52 mounted in the mounting seat 51, the mounting seat 51 closes the communication port 140, the circuit board 52 is provided with an upward plug-in piece one 53 at the communication port 140, the bottom of the functional module 4 has a plug-in piece two suitable for plug-in matching with the plug-in piece one 53, the plug-in piece one 53 and the plug-in piece two are plugged in to realize electrical connection, and the plug-in piece one 53 and the plug-in piece two are separated to cut off the electrical connection; such arrangement can realize the plug-in of the functional module 4 into the module insertion cavity 14 and the disassembly from the module insertion cavity 14, convenient disassembly, and the communication port 140 is closed by the mounting seat 51, so that high-temperature gas cannot enter the module insertion cavity 14 from the communication port 140, thereby ensuring that the functional module 4 is not affected by the impact of high-temperature gas, and ensuring the use performance of the modular molded case circuit breaker.

[0026] As shown in Figure 6 , the mounting seat 51 has an upward opening mounting groove 511, the circuit board 52 is mounted in the mounting groove 511, and a limit plate 54 is pressed on the upper side of the circuit board 52, the limit plate 54 is fixedly connected with the mounting seat 51, so that the limit plate 54 can more stably press and limit the circuit board 52, and can enhance the pressure resistance of the circuit board module 5 and reduce the impact damage of high-temperature gas flow to the circuit board module 5; the limit plate 54 is provided with an avoidance port 541 for the plug-in piece one 53 to pass through.

[0027] Continuing to refer to Figure 6 , the side wall of the mounting groove 511 is provided with a plurality of clamping holes 512, the side edge of the limit plate 54 is provided with a plurality of clamping blocks 542 corresponding to the clamping holes 512, the limit plate 54 and the mounting seat 51 are fixedly connected by the clamping block 542 and the clamping hole 512, which is convenient and reliable to assemble.

[0028] Combined with Figure 2 , Figure 5 and Figure 6As shown, the periphery of the mounting seat 51 is provided with a first upwardly protruding baffle 513 and a second outwardly protruding baffle 514, the lower side of the second baffle 514 abuts against the upper end edge of the base 1, the lower end of the communication port 140 abuts against the upper side of the second baffle 514, and the shape of the first baffle 513 matches the shape of the edge of the communication port 140 and protrudes upwardly along the edge of the communication port 140. In this way, the joint gap between the mounting seat 51 and the communication port 140 is effectively closed, preventing high-temperature gas from entering the module insertion cavity 14 from the joint gap.

[0029] Further, as shown in the drawings, Figure 4 As shown, the upper portion of the base 1 is formed with a recess 10, and when the circuit board module 5 is installed in the base 1, the second baffle 514 is inserted into the recess 10, thereby enhancing the positioning of the mounting seat 51.

[0030] In some embodiments, the mounting seat 51 is integrally provided with a downwardly extending baffle (not shown in the drawings), which is inserted into the phase spacing cavity 12, and the plate surface of the baffle is perpendicular to the length direction of the phase spacing cavity 12. In this way, the baffle can block the high-temperature gas generated at the moving and stationary contacts from entering the transformer mounting cavity 13.

[0031] In order to facilitate the removal of the functional module 4 from the module insertion cavity 14, a notch 141 is provided at the upper end edge of the module insertion cavity 14. In this way, when the functional module 4 is removed from the module insertion cavity 14, the functional module 4 is forced from the notch 141, facilitating the removal of the functional module 4.

[0032] Referring to Figure 4 As shown, each phase spacing cavity 12 is provided with an arc-extinguishing chamber mounting area 120 at the end away from the transformer mounting cavity 13, and the arc-extinguishing chamber mounting area 120 is used for mounting an arc-extinguishing chamber. Opposite two gas baffles 121 are provided on the side of each arc-extinguishing chamber mounting area 120 close to the transformer mounting cavity 13, the two gas baffles 121 are close to each other and form a moving contact passage 122 between them. Since the moving and stationary contacts will generate an arc when separated, accompanied by the release of high-temperature gas, the presence of the gas baffles 121 can block the high-temperature gas from flowing along the phase spacing cavity 12 to the transformer mounting cavity 13, which helps the arc to enter the arc-extinguishing chamber for arc-extinguishing, thereby improving the breaking capacity of the molded case circuit breaker.

[0033] In this embodiment, the mounting seat 51 is provided with a first buckle 510, and the transformer module 3 is provided with a second buckle 32, the first buckle 510 and the second buckle 32 are in clamping cooperation, thereby connecting the circuit board module 5 and the transformer module 3. During assembly, the circuit board module 5 and the transformer module 3 can be combined together and then installed in the base 1 as a whole.

[0034] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation manners of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the implementation manners. The obvious changes or variations extended from the essential spirit of the present application still belong to the protection scope of the present application.

Claims

1. A modular molded case circuit breaker, comprising a base (1), a middle cover (2) and a transformer module (3); the base (1) has several phase separation cavities (12) formed by phase separation walls (11) and a transformer installation cavity (13) communicated with the phase separation cavities (12), the transformer installation cavity (13) is provided with the transformer module (3); the middle cover (2) is provided with a module insertion cavity (14) for a functional module (4) above the transformer installation cavity (13), the bottom of the module insertion cavity (14) is provided with a communication port (140); characterized in that, The upper part of the transformer module (3) is provided with a circuit board module (5), the circuit board module (5) comprises a mounting seat (51) and a circuit board (52) mounted in the mounting seat (51), the mounting seat (51) seals the communication port (140), and the circuit board (52) is provided with an upward plug-in connector I (53) at the communication port (140), and the bottom of the function module (4) is provided with a plug-in connector II adapted to the plug-in connector I (53).

2. The modular plastic housed circuit breaker of claim 1, wherein, The mounting seat (51) has an upward opening mounting groove (511), the circuit board (52) is mounted in the mounting groove (511), and a limiting plate (54) is pressed on the upper side of the circuit board (52), and the limiting plate (54) is fixedly connected with the mounting seat (51); the limiting plate (54) is provided with an avoiding port (541) for the plug-in connector I (53) to pass through.

3. The modular plastic housed circuit breaker of claim 2, wherein, The side wall of the mounting groove (511) is provided with a plurality of clamping holes (512), and the side edge of the limiting plate (54) is provided with a plurality of clamping blocks (542) corresponding to the clamping holes (512).

4. The modular plastic housed circuit breaker of claim 1, wherein, The mounting seat (51) is provided with an upward protruding stop edge I (513) and an outward protruding stop edge II (514) around the periphery, the lower side of the stop edge II (514) abuts against the upper end edge of the base (1), the lower end face of the communication port (140) is attached to the upper side face of the stop edge II (514), and the shape of the stop edge I (513) matches the shape of the edge of the communication port (140) and protrudes upward along the edge wall of the communication port (140).

5. The modular plastic housed circuit breaker of claim 4, wherein, The upper part of the base (1) is formed with an embedding groove (10), and the stop edge II (514) is embedded in the embedding groove (10).

6. The modular plastic housed circuit breaker of claim 1, wherein, The mounting seat (51) is integrally provided with a downward extending baffle, the baffle is inserted into the phase spacing cavity (12), and the plate face of the baffle is perpendicular to the length direction of the phase spacing cavity (12).

7. The modular plastic housed circuit breaker of claim 1, wherein, The upper end edge of the module insertion cavity (14) is provided with a slot (141).

8. The modular plastic housed circuit breaker of claim 1, wherein, Each phase spacing cavity (12) is provided with an arc extinguishing chamber installation area (120) at one end away from the transformer installation cavity (13), and two opposite air blocking plates (121) are arranged on the side of each arc extinguishing chamber installation area (120) close to the transformer installation cavity (13), the two air blocking plates (121) are close to each other and form a moving contact passage (122) between the two air blocking plates (121).

9. The modular plastic housed circuit breaker of claim 1, wherein, The mounting seat (51) is provided with a buckle I (510), the transformer module (3) is provided with a buckle II (32), and the buckle I (510) and the buckle II (32) are clamped and matched.

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