Low-voltage circuit breaker with efficient protection function

Abstract

The utility model discloses a low-voltage circuit breaker with an efficient protection function, which comprises a circuit breaker main body, and one side of the circuit breaker is communicated with a fixed frame. The protection assembly comprises a first connecting block, an electric push rod, a second connecting block, a sealing cover plate, a mounting block and a temperature sensor; and one side of the first connecting block is fixedly arranged on one side of the fixed frame. Through the arrangement of the electric push rod, the sealing cover plate and the temperature sensor, when the low-voltage circuit breaker works to generate heat, the temperature sensor is used for monitoring, when the temperature does not exceed the set temperature, the sealing cover plate is used for dissipating heat, and when the temperature exceeds the set temperature, the electric push rod is opened, so that the low-voltage circuit breaker works. The second connecting block drives the sealing cover plate to be opened upwards, efficient overheating protection is carried out on the low-voltage circuit breaker in this way, circuit stability reduction caused by overheating of the low-voltage circuit breaker due to long-term work is avoided, meanwhile, aging of insulating materials is slowed down, and equipment short circuit or fire disasters are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage circuit breaker technical field, specifically is a kind of low voltage circuit breaker with efficient protection function. BACKGROUND

[0002] Low voltage circuit breaker is also called automatic air switch or automatic air circuit breaker, and is simply called circuit breaker, and it is mainly used in AC low voltage power grid, and it can be manually or electrically switched circuit, and it can realize overload, short circuit and undervoltage protection to circuit or electrical equipment, and it can be used for infrequently starting motor, and it is an important control and protection electrical appliance.

[0003] In real life, when low voltage circuit breaker is used, since most low voltage circuit breakers lack overheat protection mechanism, when low voltage circuit breaker is overheated for a long time, not only the stability of circuit is reduced, but also insulation material is easily aged, resulting in equipment short circuit or fire, so a kind of low voltage circuit breaker with efficient protection function is needed. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of low voltage circuit breaker with efficient protection function to solve the problem that most low voltage circuit breakers lack overheat protection mechanism in the above background art, when low voltage circuit breaker is overheated for a long time, not only the stability of circuit is reduced, but also insulation material is easily aged, resulting in equipment short circuit or fire.

[0005] To solve the above technical problem, the utility model is realized by the following technical scheme:

[0006] The utility model is a kind of low voltage circuit breaker with efficient protection function, comprising:

[0007] Circuit breaker main body, the side of the circuit breaker is connected with fixed frame;

[0008] Protection assembly, the protection assembly includes first connecting block, electric push rod, second connecting block, sealing cover plate, mounting block and temperature sensor;

[0009] The side of the first connecting block is fixedly arranged on the side of fixed frame, the bottom end of the electric push rod is fixedly arranged on the top end of the first connecting block, the bottom end of the second connecting block is fixedly arranged on the telescopic end of the electric push rod, the side of the sealing cover plate is fixedly arranged on the side of the second connecting block, the side of the mounting block is fixedly arranged on the side of the back of fixed frame, and the bottom end of the temperature sensor is fixedly arranged on the side of the mounting block.

[0010] Further, the protection assembly further includes heat conduction plate, and the outer wall of the heat conduction plate is embedded in the surface of the sealing cover plate.

[0011] Further, the protection assembly further comprises two sliding strips, one side of each of the two sliding strips is fixedly arranged on the two sides of the back of the sealing cover plate, and the outer walls of the two sliding strips are slidably connected with the inner side walls of the fixed frame.

[0012] Further, the protection assembly further comprises a support block, and an inner wall of the support block is fixedly arranged on the outer wall of the electric push rod.

[0013] Further, one side of the support block is fixedly provided with a sliding block, and the outer wall of the sliding block is slidably connected with one side of the sealing cover plate.

[0014] Further, the inner wall of the placing groove is provided with a filter frame in a clamping mode, and a pull rod is fixedly arranged at the bottom end of the front surface of the filter frame.

[0015] Further, the length and width dimensions of the placing groove are smaller than the length and width dimensions of the inner wall of the sealing cover plate, and one end of the pull rod is not in contact with the inner side wall of the sealing cover plate.

[0016] The utility model has the following beneficial effects:

[0017] The utility model discloses a low-voltage circuit breaker protection device, which comprises a fixed frame, a sealing cover plate, a temperature sensor, an electric push rod, a support block, a filter frame and a pull rod.

[0018] Based on the above beneficial effects, the filter frame can be dustproof when the sealing cover plate is opened for overheating protection, so that dust is prevented from entering the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0020] Figure 1 It is the whole structure schematic diagram of the utility model;

[0021] Figure 2The fixed frame is connected with the protection assembly through the fixed frame and protection assembly connecting structure.

[0022] Figure 3 The fixed frame back connecting structure schematic view of the utility model is shown in the figure.

[0023] Figure 4 The utility model discloses a Figure 2 The enlarged structure schematic view of A place in the middle.

[0024] In the drawing, the component list represented by each sign is as follows:

[0025] 1, circuit breaker main body;2, fixed frame;3, protection assembly;4, filter plate;5, pull rod;6, sliding block;

[0026] 201, placing groove;

[0027] 301, first connecting block;302, electric push rod;303, second connecting block;304, sealing cover plate;305, mounting block;306, temperature sensor;307, heat conduction plate;308, slide bar;309, support block. Specific implementation

[0028] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] In order to make the purpose, technical scheme and advantage of the utility model more clear, the embodiment of the utility model will be described in further detail below in conjunction with the drawings.

[0030] Please refer to Figures 1-4 The utility model discloses a low voltage circuit breaker with efficient protection function, which comprises:

[0031] Circuit breaker main body 1, one side of circuit breaker main body 1 is connected with fixed frame 2;

[0032] Circuit breaker main body 1 is used for connecting and disconnecting normal load current and overload current, and can also connect and disconnect short-circuit current

[0033] Protection assembly 3, protection assembly 3 includes first connecting block 301, electric push rod 302, second connecting block 303, sealing cover plate 304, mounting block 305 and temperature sensor 306;

[0034] One side of the first connecting block 301 is fixedly arranged on one side of the fixed frame 2, the bottom end of the electric push rod 302 is fixedly arranged on the top end of the first connecting block 301, the bottom end of the second connecting block 303 is fixedly arranged on the telescopic end of the electric push rod 302, one side of the sealing cover plate 304 is fixedly arranged on one side of the second connecting block 303, one side of the mounting block 305 is fixedly arranged on one side of the back of the fixed frame 2, and the bottom end of the temperature sensor 306 is fixedly arranged on one side of the mounting block 305.

[0035] The electric push rod 302 mainly provides the driving force required for the opening and closing movement of the sealing cover plate 304, the temperature sensor 306 is arranged in the inside of the circuit breaker body 1 and is used for monitoring the temperature in the inside of the circuit breaker body 1, the temperature sensor 306 is of the PT1000 type, and the principle is mainly based on the law that the physical properties of different materials change with temperature, and the temperature value is calculated by measuring the change amount of these properties, the sealing cover plate 304 and the fixed frame 2 are made of insulating materials such as silicone rubber plates;

[0036] The protection assembly 3 further comprises a heat-conducting plate 307, and the outer wall of the heat-conducting plate 307 is embedded in the surface of the sealing cover plate 304;

[0037] The heat-conducting plate 307 is made of an anodized aluminum plate, which has certain insulation while conducting heat and cooling the inside of the circuit breaker body 1, thereby improving the safety of use;

[0038] The protection assembly 3 further comprises two sliding bars 308, one side of each of the two sliding bars 308 is fixedly arranged on the two sides of the back of the sealing cover plate 304, and the outer walls of the two sliding bars 308 are respectively in sliding connection with the inner side walls of the fixed frame 2;

[0039] The sliding bar 308 is in the shape of T, which is mainly used for limiting the movement of the sealing cover plate 304 and enabling it to move stably up and down, and the inner side walls of the fixed frame 2 are provided with two sliding grooves matched with the sliding bars 308;

[0040] The protection assembly 3 further comprises a support block 309, and the inner wall of the support block 309 is fixedly arranged on the outer wall of the electric push rod 302;

[0041] The support block 309 is used for supporting the electric push rod 302, thereby improving the overall stability thereof;

[0042] One side of the support block 309 is fixedly provided with a sliding block 6, and the outer wall of the sliding block 6 is in sliding connection with one side of the sealing cover plate 304;

[0043] The sliding block 6 is in the shape of T, which cooperates with the support block 309 to ensure the stability of the electric push rod 302 while not affecting the up-and-down movement of the sealing cover plate 304, and one side of the sealing cover plate 304 is provided with a fixed groove matched with the sliding block 6;

[0044] Working principle: when the circuit breaker main body 1 generates heat in work, it is monitored by the temperature sensor 306, when the internal temperature of the circuit breaker main body 1 does not exceed the temperature set by the temperature sensor 306, at this time the heat in the circuit breaker main body 1 is dissipated outwardly through the heat conduction plate 307, when the internal temperature of the circuit breaker main body 1 exceeds the temperature set by the temperature sensor 306, at this time the electric push rod 302 is opened, the electric push rod 302 works to drive the second connecting block 303 to move upward, the second connecting block 303 drives the sealing cover plate 304 to open upward, at this time the heat is dissipated outwardly through the fixed frame 2.

[0045] This step can meet the efficient overheating protection of the low-voltage circuit breaker, avoid the decline of the circuit stability caused by the long-term overheating of the low-voltage circuit breaker, and slow down the aging of the insulation material, avoid the short circuit of the equipment or the fire.

[0046] Please refer to Figures 1-4 The embodiment further comprises the following on the basis of the above embodiment:

[0047] The inner side wall of the fixed frame 2 is provided with a placing groove 201, the inner wall of the placing groove 201 is clamped with a filter frame 4, and the bottom end of the front surface of the filter frame 4 is fixedly provided with a pull rod 5.

[0048] The filter frame 4 is used for dustproof protection of the placing groove 201, so as to avoid the dust in the external air from entering the internal part of the circuit breaker main body 1 during heat dissipation.

[0049] The length and width dimensions of the placing groove 201 are smaller than the length and width dimensions of the inner wall of the sealing cover plate 304, and one end of the pull rod 5 is not in contact with the inner side wall of the sealing cover plate 304.

[0050] Working principle: when the sealing cover plate 304 is opened for heat dissipation, the dust in the external air is prevented from entering the internal part of the circuit breaker main body 1 under the action of the filter frame 4, the filter frame 4 is replaced, the pull rod 5 is pulled outward, the pull rod 5 moves outward to drive the filter frame 4 to move outward, and the filter frame 4 is removed from the fixed frame 2.

[0051] This step can not only provide dustproof protection during overheating protection, but also facilitate the replacement of the filter frame 4, so as to ensure the heat dissipation effect of the filter frame 4.

[0052] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A low-voltage circuit breaker with high-efficiency protection function, characterized in that, include: The circuit breaker body (1) has a fixed frame (2) connected to one side of the circuit breaker body (1); The protection component (3) includes a first connecting block (301), an electric push rod (302), a second connecting block (303), a sealing cover plate (304), a mounting block (305), and a temperature sensor (306); One side of the first connecting block (301) is fixedly disposed on one side of the fixed frame (2), the bottom end of the electric push rod (302) is fixedly disposed on the top end of the first connecting block (301), the bottom end of the second connecting block (303) is fixedly disposed on the telescopic end of the electric push rod (302), one side of the sealing cover plate (304) is fixedly disposed on one side of the second connecting block (303), one side of the mounting block (305) is fixedly disposed on one side of the back of the fixed frame (2), and the bottom end of the temperature sensor (306) is fixedly disposed on one side of the mounting block (305).

2. A low-voltage circuit breaker with high-efficiency protection function according to claim 1, characterized in that: The protective component (3) also includes a heat-conducting plate (307), the outer wall of which is embedded in the surface of the sealing cover plate (304).

3. A low-voltage circuit breaker with high-efficiency protection function according to claim 1, characterized in that: The protective component (3) also includes two slide bars (308), one side of each slide bar (308) is fixedly disposed on both sides of the back of the sealing cover plate (304), and the outer walls of the two slide bars (308) are slidably connected to the inner side wall of the fixing frame (2).

4. A low-voltage circuit breaker with high-efficiency protection function according to claim 1, characterized in that: The protective component (3) also includes a support block (309), the inner wall of which is fixedly disposed on the outer wall of the electric push rod (302).

5. A low-voltage circuit breaker with high-efficiency protection function according to claim 4, characterized in that: A slider (6) is fixedly provided on one side of the support block (309), and the outer wall of the slider (6) is slidably connected to one side of the sealing cover plate (304).

6. A low-voltage circuit breaker with high-efficiency protection function according to claim 1, characterized in that: The inner side wall of the fixed frame (2) is provided with a placement groove (201), and the inner wall of the placement groove (201) is fitted with a filter frame (4). A pull rod (5) is fixedly provided at the bottom of the front side of the filter frame (4).

7. A low-voltage circuit breaker with high-efficiency protection function according to claim 6, characterized in that: The length and width of the placement groove (201) are smaller than the length and width of the inner wall of the sealing cover plate (304), and one end of the pull rod (5) does not contact the inner wall of the sealing cover plate (304).

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