Adjustable molded case circuit breaker with current-limiting time delay

Abstract

The utility model discloses an adjustable molded case circuit breaker with current-limiting and time-delay functions. The adjustable molded case circuit breaker comprises a molded case circuit breaker body, positioning mechanisms are arranged on the left side and the right side of the molded case circuit breaker body; an electronic delayer is fixedly arranged on the front face of a positioning frame included in the left side positioning mechanism, and operation panels are arranged on the upper side and the lower side of the front face of the electronic delayer correspondingly. An electronic current limiter is fixedly arranged on the front face of a positioning frame included in the right side positioning mechanism. According to the adjustable molded case circuit breaker with the current-limiting and time-delay functions, the required electronic delayer and electronic current limiter are fixedly mounted through the positioning frame, and meanwhile, the positioning frame is assisted to adapt to molded case circuit breaker bodies of different specifications through stretching and retracting of a positioning rack and a positioning lock catch in the positioning frame, so that the effect of facilitating disassembly and maintenance is achieved; and meanwhile, an electronic delayer, an electronic current limiter and an adjustable tripping characteristic are matched, so that overload and short-circuit protection is provided in an electrical system.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic case circuit breakers, in particular to a plastic case circuit breaker with adjustable current limiting delay. Background Technique

[0002] A plastic case circuit breaker refers to a device that uses a plastic insulator as the housing of the device to isolate conductors from each other and the grounded metal part, and automatically cuts off the current after the current exceeds the tripping setting. It is also called a molded case circuit breaker;

[0003] During the actual use of a plastic case circuit breaker, its internal electronic components and short-circuit component structure are very compact, and all parts are sealed in a plastic housing. Therefore, when there are component damages or internal part looseness in the plastic case circuit breaker, it is basically impossible to repair it by disassembling and assembling, and it can only be replaced by overall disassembly. At the same time, the current limiting ability of the existing plastic case circuit breaker is weak. When there is an oversized current in the circuit, the contacts of this circuit breaker are easily burned out, and the product service life is short;

[0004] Therefore, we propose a plastic case circuit breaker with adjustable current limiting delay to solve the problems mentioned above. Content of the Utility Model

[0005] The purpose of the utility model is to provide a plastic case circuit breaker with adjustable current limiting delay to solve the problems that the internal electronic components and short-circuit component structure of the existing plastic case circuit breaker are very compact, and all parts are sealed in a plastic housing. Therefore, when there are component damages or internal part looseness in the plastic case circuit breaker, it is basically impossible to repair it by disassembling and assembling, and it can only be replaced by overall disassembly. At the same time, the current limiting ability of the existing plastic case circuit breaker is weak. When there is an oversized current in the circuit, the contacts of this circuit breaker are easily burned out, and the product service life is short.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A plastic case circuit breaker with adjustable current limiting delay, including a plastic case circuit breaker body, and main wiring grooves equidistantly opened above the plastic case circuit breaker body, and auxiliary wiring grooves are equidistantly opened below the plastic case circuit breaker body;

[0007] An operation handle is rotatably arranged on the front surface of the plastic case circuit breaker body, and indicator lights are arranged on both the upper and lower sides of the front surface of the plastic case circuit breaker body;

[0008] It further includes: positioning mechanisms are arranged on both the left and right sides of the plastic case circuit breaker body, and the positioning mechanisms on both sides include positioning frames;

[0009] Among them, the positioning frame included in the left positioning mechanism is fixedly provided with an electronic time delay on the front surface, and operation panels are arranged on both the upper and lower sides of the front surface of the electronic time delay;

[0010] Among them, a positioning frame included in the right-side positioning mechanism is fixedly provided with an electronic current limiter on the front side, and a current-limiting lamp group is arranged on the front side of the electronic current limiter.

[0011] Preferably, the molded case circuit breaker body performs on-off and short-circuit operations by the up-and-down rotation of a front operating handle, and the on-off and short-circuit of the molded case circuit breaker body are displayed by indicator lights on the upper and lower sides of the front, and the molded case circuit breaker body is wired through main wiring grooves and auxiliary wiring grooves opened at equal distances on the upper and lower sides.

[0012] Preferably, the positioning frames included in the symmetrically arranged positioning mechanisms are attached to the left and right sides of the molded case circuit breaker body, sliding guide grooves are opened inside the left and right positioning frames, and a driving gear is rotatably arranged at the central position of the sliding guide grooves inside the positioning frames through bearings.

[0013] Preferably, the symmetrically arranged positioning mechanisms include positioning racks, the positioning racks are slidably arranged on the front and rear sides inside the positioning frames, positioning latches are fixedly arranged at the outer ends of the front and rear positioning racks, and the upper and lower positioning racks and the positioning latches at the outer ends are arranged in opposite directions.

[0014] Preferably, the driving gears included in the symmetrically arranged positioning mechanisms are meshed with the positioning racks on the front and rear sides inside the positioning frames, the front and rear positioning racks and the positioning latches at the outer ends penetrate through the outside of the positioning frames, and the upper and lower positioning latches are respectively clamped in the main wiring grooves and auxiliary wiring grooves on the upper and lower sides inside the molded case circuit breaker body.

[0015] Preferably, the symmetrically arranged positioning mechanisms include driving worm wheels, the driving worm wheels are fixedly arranged at the front rotating shafts of the driving gears inside the positioning frames, the positioning mechanisms include driving worm shafts, and the driving worm shafts are meshed with the lower outer walls of the driving worm wheels inside the positioning frames.

[0016] Preferably, the symmetrically arranged positioning mechanisms include elastic sliding rods, the inner ends of the symmetrically arranged elastic sliding rods penetrate through the inside of the upper and lower positioning racks, the outer ends of the symmetrically arranged elastic sliding rods are fixedly connected to the upper and lower sides inside the positioning frames, and the positioning racks are driven to slide and reset through the elastic sliding rods.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the molded case circuit breaker with adjustable current-limiting delay, the required electronic delay device and electronic current limiter are fixedly installed through the positioning frame, and at the same time, the telescoping of the positioning racks and positioning latches inside the positioning frame is used to assist the positioning frame to adapt to molded case circuit breaker bodies of different specifications, thereby achieving the effect of facilitating disassembly and maintenance. The specific content is as follows:

[0018] 1. By manually rotating the driving worm inside the positioning frame, it drives the driving worm wheel and the driving gear to rotate, thereby driving the positioning rack and the positioning latch to extend synchronously towards the outside of the positioning frame, making the positioning frame in an unlocked state for adapting and installing with plastic case circuit breaker bodies of different specifications;

[0019] 2. By attaching the unlocked positioning frame to the outside of the plastic case circuit breaker body, the elastic slide rod connected to the positioning rack contracts, driving the positioning rack and the positioning latch to move synchronously towards the positioning frame and engage, so as to engage in the main wiring groove and the secondary wiring groove, and then adapting the electronically controlled time delay relay and the electronic current limiter fixedly connected on the outside to the plastic case circuit breaker body, so as to achieve the effect of being convenient for disassembly and maintenance. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present utility model;

[0021] Figure 2 It is a schematic diagram of the installation structure of the electronic current limiter of the present utility model;

[0022] Figure 3 It is a schematic diagram of the installation structure of the secondary wiring groove of the present utility model;

[0023] Figure 4 It is a schematic diagram of the installation structure of the positioning frame of the present utility model;

[0024] Figure 5 For the present utility model Figure 4 The enlarged schematic diagram at position A;

[0025] Figure 6 It is a schematic diagram of the installation structure of the positioning latch of the present utility model;

[0026] Figure 7 It is a schematic diagram of the installation structure of the driving worm wheel of the present utility model.

[0027] In the figure: 1, plastic case circuit breaker body; 2, main wiring groove; 3, secondary wiring groove; 4, operating handle; 5, indicator light; 6, electronically controlled time delay relay; 7, operation panel; 8, electronic current limiter; 9, current limiting lamp group; 10, sliding guide groove; 11, driving gear; 12, positioning rack; 13, positioning latch; 14, driving worm wheel; 15, driving worm; 16, elastic slide rod; 17, positioning frame. Specific Embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1 - 7 , the present utility model provides the following technical solutions:

[0030] Embodiment 1: To illustrate the working method of the molded case circuit breaker body 1, this embodiment is described through the following technical solutions. A molded case circuit breaker with adjustable current limiting and delay includes a molded case circuit breaker body 1, and main wiring slots 2 equidistantly opened above the molded case circuit breaker body 1, and auxiliary wiring slots 3 are equidistantly opened below the molded case circuit breaker body 1; an operating handle 4 is rotatably arranged on the front of the molded case circuit breaker body 1, and indicator lights 5 are arranged on both the upper and lower sides of the front of the molded case circuit breaker body 1;

[0031] The molded case circuit breaker body 1 conducts the operations of making and short - circuiting through the up - and - down rotation of the front operating handle 4, and the making and short - circuiting of the molded case circuit breaker body 1 are displayed through the indicator lights 5 on both the upper and lower sides of the front, and the molded case circuit breaker body 1 is wired through the main wiring slots 2 and auxiliary wiring slots 3 equidistantly opened on both sides;

[0032] As Figures 1 - 3 shown, first, install the molded case circuit breaker body 1 at the required site, and then connect the incoming line and the outgoing line to the main wiring slots 2 and auxiliary wiring slots 3 equidistantly opened at the upper and lower ends of the molded case circuit breaker body 1 respectively, and lock and fix the incoming line and the outgoing line through the fastening bolts arranged in the main wiring slots 2 and auxiliary wiring slots 3;

[0033] Furthermore, when the operating handle 4 arranged on the front of the molded case circuit breaker body 1 is toggled upward, a path is formed between the incoming line, the molded case circuit breaker body 1, and the outgoing line to allow the normal flow of current. When a short - circuit or other situations occur, a downward suction force is generated by the coil inside the molded case circuit breaker body 1 to attract the moving iron core and drive the operating handle 4 to rotate downward, thereby disconnecting the current inside the molded case circuit breaker body 1 to achieve short - circuit protection; at the same time, when an overload occurs inside the molded case circuit breaker body 1, the metal sheet inside it is deformed by heat, pushing the operating handle 4 downward to form a trip to achieve the protection effect.

[0034] Embodiment 2: To solve the problem that parts of the existing molded case circuit breaker body 1 are damaged and cannot be repaired, the following technical solutions are described in this embodiment. Positioning mechanisms are provided on both the left and right sides of the molded case circuit breaker body 1, and the positioning mechanisms on both sides include positioning frames 17. Among them, an electronic time delay relay 6 is fixedly provided on the front surface of the positioning frame 17 included in the left positioning mechanism, and operation panels 7 are provided on both the upper and lower sides of the front surface of the electronic time delay relay 6. Among them, an electronic current limiter 8 is fixedly provided on the front surface of the positioning frame 17 included in the right positioning mechanism, and a current limiting lamp group 9 is provided on the front surface of the electronic current limiter 8.

[0035] The positioning frames 17 included in the symmetrically arranged positioning mechanisms are attached to both the left and right sides of the molded case circuit breaker body 1. Sliding guide grooves 10 are opened inside the positioning frames 17 on both sides, and a driving gear 11 is rotatably provided at the central position of the sliding guide grooves 10 inside the positioning frames 17 through bearings. The symmetrically arranged positioning mechanisms include positioning racks 12, and the positioning racks 12 are slidably arranged on the front and rear sides inside the positioning frames 17. Positioning locks 13 are fixedly provided at the outer ends of the positioning racks 12 on the front and rear sides, and the positioning racks 12 on the upper and lower sides and the positioning locks 13 at the outer ends are arranged in opposite directions.

[0036] The driving gears 11 included in the symmetrically arranged positioning mechanisms are meshed with the positioning racks 12 on the front and rear sides inside the positioning frames 17. The positioning racks 12 on the front and rear sides and the positioning locks 13 at the outer ends all penetrate through the outside of the positioning frames 17, and the positioning locks 13 on the upper and lower sides are respectively clamped in the main wiring grooves 2 and the auxiliary wiring grooves 3 on the upper and lower sides inside the molded case circuit breaker body 1. The symmetrically arranged positioning mechanisms include driving worm wheels 14, and the driving worm wheels 14 are fixedly provided at the front rotating shafts of the driving gears 11 inside the positioning frames 17. The positioning mechanisms include driving worm shafts 15, and the driving worm shafts 15 are meshed with the lower outer walls of the driving worm wheels 14 inside the positioning frames 17.

[0037] The symmetrically arranged positioning mechanisms include elastic sliding rods 16. The inner ends of the symmetrically arranged elastic sliding rods 16 all penetrate through the inside of the positioning racks 12 on the upper and lower sides, and the outer ends of the symmetrically arranged elastic sliding rods 16 are fixedly connected to the upper and lower sides inside the positioning frames 17. The positioning racks 12 are driven to slide and reset through the elastic sliding rods 16.

[0038] Such as Figures 6 - 7As shown in the figure, first, the electronic time delay device 6 and the electronic current limiter 8 are fixedly installed on the front of the positioning frame 17. Then, when the positioning frame 17 needs to be adapted to plastic case circuit breakers 1 of different specifications, the driving worm 15 arranged inside the positioning frame 17 is manually rotated, so that the driving worm 15 drives the driving worm wheel 14 rotatably arranged inside the positioning frame 17 to rotate. At the same time, the driving worm wheel 14 drives the driving gear 11 fixedly connected to the rear to rotate. Then, the driving gear 11 drives the positioning racks 12 engaged on the left and right sides to slide synchronously outward after squeezing the elastic slide rods 16 inside, so that the positioning frame 17 is in an unlocked state, so as to be adapted and installed with plastic case circuit breakers 1 of different specifications.

[0039] As Figures 4 - 5 shown in the figure, the positioning frame 17 in the unlocked state is attached to the outer walls on the left and right sides of the plastic case circuit breaker 1. Then, after the driving worm 15 is manually released, the elastic slide rod 16 connected to the positioning rack 12 inside the positioning frame 17 contracts, so that it drives the positioning rack 12 and the positioning lock 13 at the inner end to move synchronously in the direction of the positioning frame 17, so as to be clamped in the main wiring groove 2 and the auxiliary wiring groove 3 on the upper and lower sides of the plastic case circuit breaker 1. Furthermore, the electronic time delay device 6 and the electronic current limiter 8 fixedly connected to the outside are adapted to the plastic case circuit breaker 1, so as to achieve the effect of facilitating disassembly and maintenance.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A molded case circuit breaker with adjustable current limiting time delay, comprising a molded case circuit breaker body (1), and main wiring slots (2) equidistantly arranged above the molded case circuit breaker body (1), and auxiliary wiring slots (3) equidistantly arranged below the molded case circuit breaker body (1); An operating handle (4) is rotatably provided on the front of the molded case circuit breaker body (1), and indicator lights (5) are provided on both upper and lower sides of the front of the molded case circuit breaker body (1); It is characterized in that Also includes: The left and right sides of the molded case circuit breaker body (1) are both provided with positioning mechanisms, and the positioning mechanisms on the left and right sides include positioning frames (17); The front side of the positioning frame (17) included in the left positioning mechanism is fixedly provided with an electronic time delayer (6), and the upper and lower sides of the front side of the electronic time delayer (6) are provided with operation panels (7); The front side of the positioning frame (17) included in the right positioning mechanism is fixedly provided with an electronic current limiter (8), and the front side of the electronic current limiter (8) is provided with a current limiting lamp group (9).

2. A molded case circuit breaker with adjustable current limiting and time delay according to claim 1, characterized in that: The molded case circuit breaker body (1) performs the operation of opening and closing a circuit by rotating the front operating handle (4) up and down, and the opening and closing of the molded case circuit breaker body (1) are displayed by indicator lights (5) on the upper and lower sides of the front, and the molded case circuit breaker body (1) is wired through the main wiring slot (2) and the auxiliary wiring slot (3) provided at equal distances on the upper and lower sides.

3. A molded case circuit breaker with adjustable current limiting and time delay according to claim 1, characterized in that: The symmetrically arranged positioning mechanism comprises a positioning frame (17) which is fitted on the left and right sides of the molded case circuit breaker body (1), and a sliding guide groove (10) is provided inside the positioning frames (17) on the left and right sides, and a driving gear (11) is rotatably arranged at the center position of the sliding guide groove (10) inside the positioning frame (17) via a bearing.

4. A molded case circuit breaker with adjustable current limiting and time delay according to claim 3, characterized in that: The symmetrically arranged positioning mechanism comprises a positioning rack (12), and the positioning rack (12) is slidably arranged on the front and rear sides of the interior of the positioning frame (17), and the outer ends of the positioning racks (12) on the front and rear sides are fixedly provided with positioning lock buckles (13), and the upper and lower positioning racks (12) and the positioning lock buckles (13) on the outer ends are arranged in opposite directions.

5. The molded case circuit breaker with adjustable current limiting and time delay according to claim 3 is characterized in that: The symmetrically arranged positioning mechanism comprises a driving gear (11) meshingly connected to positioning racks (12) on the front and rear sides of the positioning frame (17), and the positioning racks (12) on the front and rear sides and the positioning lock buckles (13) at the outer ends are all arranged through the outside of the positioning frame (17), and the positioning lock buckles (13) on the upper and lower sides are respectively clamped in the main wiring slot (2) and the auxiliary wiring slot (3) on the upper and lower sides of the molded case circuit breaker body (1).

6. A molded case circuit breaker with current limiting and adjustable time delay according to claim 3, characterized in that: The symmetrically arranged positioning mechanism includes a driving worm wheel (14), and the driving worm wheel (14) is fixedly arranged at the front rotation axis of the driving gear (11) inside the positioning frame (17), and the positioning mechanism includes a driving worm (15), and the driving worm (15) is meshedly connected to the lower outer wall of the driving worm wheel (14) inside the positioning frame (17).

7. The molded case circuit breaker with adjustable current limiting and time delay according to claim 3, characterized in that: The symmetrically arranged positioning mechanism includes an elastic slide bar (16), and the inner ends of the symmetrically arranged elastic slide bars (16) are both inserted into the interior of the upper and lower positioning racks (12), and the outer ends of the symmetrically arranged elastic slide bars (16) are both fixedly connected to the upper and lower interior sides of the positioning frame (17), and the positioning racks (12) are driven by the elastic slide bars (16) to slide and reset.

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