Protective device for conductive system of molded case circuit breaker

Abstract

The utility model discloses a molded case circuit breaker conductive system protection device, which comprises a front shell and a rear shell movably arranged on one side of the front shell, the top and the bottom of the front shell are fixedly connected with fixing plates, one end of each fixing plate is provided with a slot, the top and the bottom of the rear shell are provided with sliding chutes, the interiors of the sliding chutes are slidably connected with sliding blocks, and the sliding blocks are arranged in the sliding chutes. The top of the sliding block is fixedly connected with a fixing base, the inner wall of the fixing base is fixedly connected with an inserting plate used in cooperation with the inserting groove, an elastic piece is installed in the sliding groove, limiting plates are fixedly connected to the top and the bottom of the rear shell and located on one side of the fixing base, and ventilation grooves are formed in the upper ends and the lower ends of the two side walls of the rear shell. Through the arrangement of the fixing plate, the fixing seat, the insertion plate and other structures, the front shell and the rear shell can be fixed under the condition that bolts are not used, the installation steps are simplified, the front shell and the rear shell can be detached by moving the fixing seat, and maintenance work of workers can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of molded case circuit breakers, in particular to a conductive system protection device for a molded case circuit breaker. Background Art

[0002] Molded case circuit breakers can automatically cut off the current when the current exceeds the trip setting. Molded case refers to the plastic insulator used as the outer shell of the device to isolate the conductors and the grounded metal parts. Molded case circuit breakers usually contain thermal magnetic trip units, and large-sized molded case circuit breakers are equipped with solid-state trip sensors. Its trip units are divided into: thermal magnetic trip and electronic trip.

[0003] A Chinese patent with publication number (CN212570890U) discloses a conductive system protection device for a molded case circuit breaker, comprising an upper shell and a lower shell, wherein a hair dryer box and an exhaust fan box are respectively arranged on both sides of the interior of the lower shell, and a hair dryer is arranged inside the hair dryer box, a hair dryer is arranged on one side of the hair dryer, and the hair dryer motor is electrically connected to the hair dryer, and an exhaust fan is arranged inside the exhaust fan box, and an exhaust fan is arranged on one side of the exhaust fan, and the exhaust fan motor is electrically connected to the exhaust fan. The utility model is convenient for heat dissipation of the molded case circuit breaker in conduction by arranging a hair dryer and an exhaust fan on both sides of the lower shell, thereby preventing damage to internal components due to excessive temperature. By opening a plurality of vents on both sides of the lower shell, it is convenient to circulate air inside and outside the molded case circuit breaker, thereby achieving better heat dissipation effect. By arranging a switch on the outer side of the upper shell, it is convenient to manually cut off and turn on the power.

[0004] The defect of the above-selected technology is that the upper shell and the lower shell are split, and the commonly used fixing method is to fix the upper shell and the lower shell with four screws. However, when the staff maintains the molded case circuit breaker, this fixing method requires the use of the same type of screwdriver for multiple disassembly. If the screwdriver model is not correct, it takes time to get it, and the screws are prone to stripping if they are twisted a certain amount, and the removed screws are easy to be lost. Utility Model Content

[0005] The utility model aims to provide a protective device for a conductive system of a molded case circuit breaker to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective device for a conductive system of a molded case circuit breaker, comprising a front shell and a rear shell movably mounted on one side of the front shell, the top and bottom of the front shell are fixedly connected with a fixing plate, one end of the fixing plate is provided with a slot, the top and bottom of the rear shell are provided with a slide groove, the interior of the slide groove is slidably connected with a slider, the top of the slider is fixedly connected with a fixing seat, the inner wall of the fixing seat is fixedly connected with a plug plate used in conjunction with the slot, and an elastic member is installed inside the slide groove.

[0007] As a preferred solution of the utility model, the top and the bottom of the rear shell and one side of the fixing seat are fixedly connected to a limiting plate.

[0008] As a preferred solution of the utility model, ventilation slots are provided at the upper and lower ends of the two side walls of the rear shell.

[0009] As a preferred solution of the utility model, a screw is threadedly connected to the front groove of the rear shell, and a wire pressing plate is threadedly connected to the outer side of the screw.

[0010] As a preferred solution of the utility model, fixing holes are provided in the interior of the front shell and the interior of the rear shell at positions corresponding to the front shell.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model can fix the front shell and the rear shell without using bolts by means of the fixed plate, fixed seat and plug plate structures, thereby simplifying the installation steps, and can also disassemble the front shell and the rear shell by moving the fixed seat, thereby facilitating maintenance operations by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the utility model;

[0015] Figure 4 For the utility model Figure 2 Enlarged structural diagram at A in the middle.

[0016] In the figure: 1. front shell; 2. rear shell; 3. ventilation slot; 4. fixing plate; 5. slot; 6. limit plate; 7. fixing seat; 8. slider; 9. plug-in plate; 10. slide groove; 11. elastic part; 12. fixing hole; 13. wire pressing plate; 14. screw. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 4 The utility model provides a technical solution: a conductive system protection device for a molded case circuit breaker. The molded case circuit breaker is a device for long-time delay overload and instantaneous short circuit. It includes a front shell 1 and a rear shell 2 movably installed on one side of the front shell 1. The top and bottom of the front shell 1 are fixedly connected with a fixing plate 4. The fixing plate 4 is located at a corner position, and after the front shell 1 and the rear shell 2 are buckled, the bottom of the fixing plate 4 fits with the top of the rear shell 2. A slot 5 is opened at one end of the fixing plate 4. The slot 5 is a rectangular square slot. A slide groove 10 is opened at the top and bottom of the rear shell 2. The slide groove 10 is T-shaped. A slider 8 is slidably connected inside the slide groove 10. The slider 8 is T-shaped. A fixed seat 7 is fixedly connected to the top of the slider 8. The fixed seat 7 is slidably connected to the rear shell 2. The inner wall of the fixed seat 7 is fixedly connected with a plug plate 9 used in conjunction with the slot 5. The length of the plug plate 9 is less than the length of the fixed seat 7. An elastic member 11 is installed inside the slide groove 10, and the elastic member 11 can be a spring.

[0019] Among them, the top and bottom of the rear shell 2 and one side of the fixing seat 7 are fixedly connected with the limiting plate 6. When the front shell 1 and the rear shell 2 are installed, the fixing plate 4 needs to pass through the inside of the limiting plate 6. The limiting plate 6 can improve the stability of the fixing plate 4.

[0020] Among them, ventilation grooves 3 are opened at the upper and lower ends of the two side walls of the rear shell 2, and the rear shell 2 is located at the position of the ventilation grooves 3 as an outwardly protruding bottom opening cover plate, and has a dust filter. The ventilation grooves 3 can dissipate heat inside the molded case circuit breaker.

[0021] Among them, a screw 14 is threadedly connected to the groove on the front side of the rear shell 2, and a wire pressing plate 13 is threadedly connected to the outer side of the screw 14 to facilitate wiring.

[0022] Among them, fixing holes 12 are provided at positions inside the front shell 1 and inside the rear shell 2 corresponding to the front shell 1, so as to facilitate fixing the molded case circuit breaker to a wall or an electrical cabinet.

[0023] Specifically, when the front shell 1 and the rear shell 2 need to be disassembled for inspection and repair, it is only necessary to push the fixing seat 7 toward the middle of the rear shell 2 so that the slider 8 slides inside the slide groove 10 and squeezes the elastic member 11, and then the plug plate 9 is detached from the inside of the slot 5, the fixing plate 4 can be pulled out and then the front shell 1 and the rear shell 2 can be separated. After the inspection and repair is completed, the fixing plate 4 is passed through the limiting plate 6 and then the fixing seat 7 is pushed toward the middle of the rear shell 2 in the same way. After the front shell 1 and the rear shell 2 are buckled together, the fixing seat 7 is released so that the slider 8 pushes the fixing seat 7 to reset under the elastic force of the elastic member 11, and the plug plate 9 is inserted into the inside of the slot 5 to fix the fixing plate 4, and then the front shell 1 and the rear shell 2 can be fixed.

[0024] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0026] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective device for a conductive system of a molded case circuit breaker, comprising a front shell (1) and a rear shell (2) movably mounted on one side of the front shell (1), characterized in that: The top and bottom of the front shell (1) are fixedly connected to a fixing plate (4), one end of the fixing plate (4) is provided with a slot (5), the top and bottom of the rear shell (2) are provided with a slide groove (10), the interior of the slide groove (10) is slidably connected to a slider (8), the top of the slider (8) is fixedly connected to a fixing seat (7), the inner wall of the fixing seat (7) is fixedly connected to an inserting plate (9) used in conjunction with the slot (5), and an elastic member (11) is installed inside the slide groove (10).

2. A protective device for conductive system of a molded case circuit breaker according to claim 1, characterized in that: The top and bottom of the rear shell (2) and one side of the fixing seat (7) are fixedly connected to the limiting plate (6).

3. A protective device for conductive system of a molded case circuit breaker according to claim 2, characterized in that: Ventilation slots (3) are provided at the upper and lower ends of the two side walls of the rear shell (2).

4. A protective device for conductive system of a molded case circuit breaker according to claim 3, characterized in that: A screw (14) is threadedly connected to the front groove of the rear shell (2), and a wire pressing plate (13) is threadedly connected to the outer side of the screw (14).

5. A protective device for conductive system of a molded case circuit breaker according to claim 4, characterized in that: Fixing holes (12) are provided in the interior of the front shell (1) and the interior of the rear shell (2) at positions corresponding to the front shell (1).

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