CN217933656U - Circuit breaker - Google Patents

Abstract

The utility model discloses a circuit breaker. The circuit breaker includes: casing, binding post and temperature sensor, casing are equipped with the terminal seat, and binding post locates the terminal seat, and temperature sensor locates binding post in order to be used for measuring binding post's temperature, and temperature sensor has the lead wire end, and lead wire end and binding post's creepage distance more than or equal to 4mm. According to the utility model discloses circuit breaker, binding post is located to temperature sensor, binding post and lead wire end's creepage distance more than or equal to 4mm, and temperature sensor can be timely, accurately measure binding post's temperature to guarantee temperature sensor's reliability.

Description

Circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field particularly, relates to a circuit breaker.

Background

The circuit breaker can be used to break off the fault circuit, and the accident prevention enlarges, guarantees safe operation, and the circuit breaker is after installation operation a period, and the wire can cause junction resistance to increase owing to revolve wrong reason such as tight, metal oxidation with the binding post of circuit breaker, and then causes binding post temperature to rise, arouses the conflagration when serious, and in addition, binding post is overheated can cause comparatively serious line loss, leads to the loss of power resource.

In the related art, a temperature sampling device of the circuit breaker is usually placed on a circuit board in the circuit breaker, the temperature sampling device can only monitor the internal temperature of the circuit breaker, the real temperature of a wiring terminal cannot be truly reflected, and the accuracy and the timeliness of temperature detection are poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the utility model provides a circuit breaker, can in time, accurately measure binding post's temperature.

According to the utility model discloses circuit breaker, include: the terminal comprises a shell, a first connecting piece and a second connecting piece, wherein the shell is provided with a terminal seat; the wiring terminal is arranged on the terminal base; temperature sensor, temperature sensor locates binding post is in order to be used for measuring binding post's temperature, temperature sensor has the lead wire end, just the lead wire end with binding post's creepage distance more than or equal to 4mm.

According to the utility model discloses circuit breaker, binding post is located to temperature sensor, binding post and lead wire end's creepage distance more than or equal to 4mm, and temperature sensor can be timely, accurately measure binding post's temperature to guarantee temperature sensor's reliability.

According to the utility model discloses a some embodiments, binding post is equipped with the mounting hole, temperature sensor's one end is the stiff end, the stiff end is fixed in the mounting hole, temperature sensor's the other end does the lead wire end, the lead wire end is located outside the mounting hole.

Further, the mounting hole is a blind hole.

Further, the temperature sensor has an insulated sensor housing, the sensor housing includes a housing body and a radial protrusion, the fixed end is formed at one end of the housing body, the lead terminal is led out from the housing body, the radial protrusion is located between the fixed end and the lead terminal, and the radial protrusion surrounds the housing body along the circumferential direction of the housing body.

Further, the radial bulge is located outside the mounting hole, and the end face of the radial bulge, facing the wiring terminal, is suitable for being attached to the wiring terminal.

According to the utility model discloses a some embodiments, the stiff end through the heat conduction glue with the mounting hole is fixed.

According to some embodiments of the present invention, the lead terminal is provided with a first lead and a second lead, the first lead and the space between the second leads is a preset standard space.

According to some embodiments of the utility model, the circuit breaker still include processing unit, processing unit with the lead wire end communication is connected, processing unit is used for acquireing binding post's temperature data, and report to the police and/or control when temperature data is unusual the circuit breaker outage.

Further, the temperature data anomaly comprises: the temperature of the wiring terminal is larger than a first preset temperature threshold value, and/or the temperature of the wiring terminal rising within a preset time is larger than a second preset temperature threshold value.

Further, the circuit breaker comprises a plurality of wiring terminals, and each wiring terminal is provided with the temperature sensor; the temperature data anomaly further comprises: the temperature difference value of any two of the wiring terminals is larger than a third preset temperature threshold value.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is an exploded view of a circuit breaker according to an embodiment of the present invention;

fig. 2 is another exploded view of a circuit breaker according to an embodiment of the present invention.

Reference numerals are as follows:

the circuit breaker comprises a shell 1, a first shell 11, a second shell 12, a terminal base 13, a wiring terminal 2, a temperature sensor 3, a fixed end 31, a lead end 32, a radial bulge 33 and a circuit breaker 10.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "thickness", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes the circuit breaker 10 according to an embodiment of the present invention in detail with reference to fig. 1 and 2.

Referring to fig. 1 and 2, a circuit breaker 10 includes: casing 1, binding post 2 and temperature sensor 3, casing 1 are equipped with terminal block 13, and terminal block 13 is suitable for fixed binding post 2, and binding post 2 locates terminal block 13, and modes such as binding post 2 accessible joint are fixed with terminal block 13.

The temperature sensor 3 is arranged on the wiring terminal 2 and used for measuring the temperature of the wiring terminal 2, so that the length of a heat transfer path between the temperature sensor 3 and the wiring terminal 2 can be reduced, and the timeliness and the accuracy of the temperature measurement of the wiring terminal 2 can be guaranteed. Temperature sensor 3 has lead wire 32, lead wire 32 can be used to temperature sensor 3's power supply and signal transmission, and lead wire 32 and binding post 2's creepage distance more than or equal to predetermine creepage distance, predetermine creepage distance and be 4mm, it can be understood, creepage distance is the shortest path between binding post 2 and the lead wire 32 along insulating sensor housing surface record, binding post 2 is used for the forceful electric power transmission, lead wire 32 is used for the weak current transmission, binding post 2 and lead wire 32 creepage distance more than or equal to 4mm, with the electrical insulation who guarantees between binding post 2 and the lead wire 32, thereby be favorable to promoting temperature sensor 3 reliability.

According to the utility model discloses circuit breaker 10, binding post 2 is located to temperature sensor 3, binding post 2 and lead wire end 32's creepage distance more than or equal to 4mm, and temperature sensor 3 can be timely, accurately measure binding post 2's temperature to guarantee the 3 reliability of temperature sensor.

The utility model discloses an in some embodiments, referring to fig. 1 and fig. 2 and showing, binding post 2 is equipped with the mounting hole, and temperature sensor 3's one end is stiff end 31, and in stiff end 31 was fixed in the mounting hole, stiff end 31 can with mounting hole interference fit to guarantee that stiff end 31 closely laminates with the mounting hole, thereby be favorable to promoting temperature sensor 3 to 2 temperature measurement's of binding post timeliness and accuracy. The other end of temperature sensor 3 is lead terminal 32, and lead terminal 32 is located outside the mounting hole, and lead terminal 32 can transmit the temperature data that temperature sensor 3 measured, and lead terminal 32 that is located outside the mounting hole can make electrical insulation between binding post 2 and the lead terminal 32, avoids temperature sensor 3 to take place the short circuit.

The utility model discloses an in some embodiments, the mounting hole is the blind hole, that is to say, the mounting hole does not run through binding post 2 in binding post 2's thickness direction to be favorable to reducing the influence of mounting hole to binding post 2 cross-sectional area, reduce the calorific capacity of binding post 2 when transmission current.

In some embodiments of the utility model, refer to fig. 1 and fig. 2, temperature sensor 3 has insulating sensor housing, sensor housing includes shell body and radial bulge 33, stiff end 31 is formed at shell body's one end, lead wire 32 draws forth from shell body internally, radial bulge 33 is located between stiff end 31 and the lead wire 32, and radial bulge 33 encircles in shell body along shell body's circumference, the creepage distance between radial bulge 33 multiplicable binding post 2 and the lead wire 32, thereby be favorable to temperature sensor 3 electrical property's stability, and simultaneously, when satisfying creepage distance more than or equal to of lead wire 32 and binding post 2 and predetermineeing creepage distance, the axial length that the mounting hole was stretched out to radial bulge 33's reducible temperature sensor 3 that sets up, in order to reduce temperature sensor 3's occupation space, realize temperature sensor 3's miniaturization.

In some embodiments of the present invention, the temperature sensor 3 includes a sensor housing and a temperature sensing element, the temperature sensing element is disposed in the sensor housing, the lead end 32 is connected to the temperature sensing element, the sensor housing is made of insulating material, the sensor housing can withstand the ac voltage above 4kV, the temperature sensing element can be an NTC negative temperature coefficient ceramic thermistor, and can measure the temperature from-40 ℃ to 300 ℃ to ensure the reliability of the temperature sensor 3.

The utility model discloses an in some embodiments, radial protrusion 33 is located outside the mounting hole, and radial protrusion 33's the terminal surface towards binding post 2 is suitable for laminating with binding post 2, that is to say, radial protrusion 33 can also be used to temperature sensor 3 spacing with binding post 2's installation, when stiff end 31 ends to the diapire in the mounting hole, radial protrusion 33 can laminate with binding post 2 towards binding post 2's terminal surface, thereby be favorable to temperature sensor 3's assembly, and simultaneously, after radial protrusion 33 and binding post 2 laminated, radial protrusion 33 can prevent that stiff end 31 from taking place to rock in the mounting hole, thereby can be under the condition that reduces mounting hole aperture and stiff end 31 diameter, still guarantee reliability and stability that temperature sensor 3 is connected with binding post 2, and then the accessible reduces the aperture of mounting hole and reduces binding post 2 calorific capacity when transmission current.

The utility model discloses an in some embodiments, stiff end 31 is fixed with the mounting hole through heat-conducting glue, and heat-conducting glue can be heat-conducting epoxy glue or heat-conducting silica gel, and heat-conducting glue can fill the clearance between stiff end 31 and the mounting hole and form high-efficient ground heat transfer path to promote binding post 2 and temperature sensor 3's heat transfer speed, thereby guarantee that temperature sensor 3 is to binding post 2 temperature measurement's timeliness and accuracy.

The utility model discloses an in some embodiments, the lead terminal 32 is equipped with first lead wire and second lead wire, interval between first lead wire and the second lead wire is predetermined standard interval, first lead wire and second lead wire are suitable for inserting two adjacent plug-in components holes on PCB (printed circuit board) board, with the temperature data to PCB board transmission temperature sensor 3 measuring, wherein, predetermined standard interval can be 2.56mm, with the PCB board on two adjacent plug-in components distance adaptations between the hole, with the technological demand that satisfies automatic plug-in components in batches, and simultaneously, first lead wire and second lead wire can tin-plating, with satisfy wave soldering technological requirement, and then be favorable to realizing circuit breaker 10 automated manufacturing. It should be noted that the PCB board may be a PCB board of the processing unit, or the PCB board is communicatively connected to the processing unit.

The utility model discloses an in some embodiments, circuit breaker 10 still includes processing unit, processing unit and lead wire end 32 communication connection, processing unit is used for acquireing binding post 2's temperature data to report to the police and/or control circuit breaker 10 outage when temperature data is unusual, that is to say, when binding post 2's temperature data is unusual, processing unit reports to the police, thereby makes maintainer can in time discover binding post 2 temperature data unusual, with the line loss that reduces binding post 2 and heat up and cause. When the temperature data of the wiring terminal 2 is abnormal, the processing unit can also control the circuit breaker 10 to be powered off so as to avoid fire caused by overheating of the wiring terminal 2. Of course, when the temperature data of the wiring terminal 2 is abnormal, the processing unit can simultaneously alarm and control the circuit breaker 10 to be powered off so as to improve the intelligent level and the safety performance of the circuit breaker 10.

Optionally, the processing unit is an MCU (micro control unit), the processing unit can store the temperature data of the wiring terminal 2, record an event of the abnormal temperature data, and be connected to the cloud end to upload the abnormal temperature data and perform remote alarm.

In some embodiments of the present invention, the temperature data anomaly comprises: the temperature of the connection terminal 2 is greater than a first preset temperature threshold value, and/or the temperature of the connection terminal 2 rising within a preset time is greater than a second preset temperature threshold value, that is, when the temperature of the connection terminal 2 is greater than the first preset temperature threshold value, the processing unit determines that the temperature data of the connection terminal 2 is abnormal. When the temperature of the wiring terminal 2 rising within the preset time is greater than a second preset temperature threshold, the processing unit determines that the temperature data of the wiring terminal 2 is abnormal. When the temperature of the wiring terminal 2 is greater than a first preset temperature threshold and the temperature of the wiring terminal 2 rising within a preset time is greater than a second preset temperature threshold, the processing unit determines that the temperature data of the wiring terminal 2 is abnormal.

For example, the first preset temperature threshold is 55 ℃, the preset time is 3S, the second preset temperature threshold is 10 ℃, and when the temperature of the connection terminal 2 is greater than 55 ℃, the processing unit determines that the temperature data of the connection terminal 2 is abnormal. When the raised temperature of the connection terminal 2 within 3S is greater than 10 ℃, the processing unit determines that the temperature data of the connection terminal 2 is abnormal.

In some embodiments of the present invention, the circuit breaker 10 includes a plurality of wiring terminals 2, each wiring terminal 2 is provided with a temperature sensor 3, and the temperature data includes: the temperature difference value of any two binding post 2 is greater than the third preset temperature threshold value to through the comparison of temperature between a plurality of binding post 2, in time discover the binding post 2 that temperature data is unusual.

For example, the third preset temperature threshold is 5 ℃, and when the temperature difference between any two of the connection terminals 2 is greater than 5 ℃, the processing unit determines that the temperature data of the connection terminal 2 with high temperature is abnormal.

In some embodiments of the present invention, referring to fig. 1 and 2, the housing 1 includes a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 can be assembled by a clamping and/or screwing manner, the first housing 11 and the second housing 12 jointly define the terminal base 13, the terminal base 13 can be formed with a limiting feature such as a clamping groove suitable for limiting the connection terminal 2, the first housing 11 and the second housing 12 can limit and fix the connection terminal 2 to the terminal base 13 after assembly, and ensure the position accuracy and the position consistency of the connection terminal 2, thereby reducing the difference between products.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A circuit breaker, comprising:

the shell is provided with a terminal seat;

the wiring terminal is arranged on the terminal base;

temperature sensor, temperature sensor locates binding post is in order to be used for measuring binding post's temperature, temperature sensor has the lead wire end, just the lead wire end with binding post's creepage distance more than or equal to 4mm.

2. The circuit breaker according to claim 1, wherein the connection terminal is provided with a mounting hole, one end of the temperature sensor is a fixed end, the fixed end is fixed in the mounting hole, the other end of the temperature sensor is the lead end, and the lead end is located outside the mounting hole.

3. The circuit breaker of claim 2, wherein the mounting hole is a blind hole.

4. The circuit breaker according to claim 2, wherein the temperature sensor has an insulative sensor case, the sensor case includes a case body, the fixed end is formed at one end of the case body, the lead terminal is led out from the case body, the radial protrusion is located between the fixed end and the lead terminal, and the radial protrusion is surrounded around the case body in a circumferential direction of the case body.

5. The circuit breaker of claim 4, wherein the radial protrusion is located outside the mounting hole, and an end surface of the radial protrusion facing the terminal block is adapted to be fitted with the terminal block.

6. The circuit breaker according to any one of claims 2-5, wherein the fixed end is fixed to the mounting hole by a thermally conductive adhesive.

7. The circuit breaker of claim 1, wherein the lead terminal is provided with a first lead and a second lead, and a distance between the first lead and the second lead is a preset standard distance.

8. The circuit breaker according to claim 1 or 7, further comprising a processing unit, wherein the processing unit is connected with the lead terminal in a communication manner, and is used for acquiring temperature data of the wiring terminal, and alarming and/or controlling the circuit breaker to power off when the temperature data is abnormal.

9. The circuit breaker of claim 8, wherein the temperature data anomaly comprises: the temperature of the wiring terminal is larger than a first preset temperature threshold value, and/or the temperature of the wiring terminal rising within a preset time is larger than a second preset temperature threshold value.

10. The circuit breaker according to claim 9, characterized in that it comprises a plurality of said terminals, each provided with said temperature sensor;

the temperature data anomaly further comprises: and the temperature difference value of any two of the wiring terminals is greater than a third preset temperature threshold value.

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