CN211788859U

CN211788859U - Circuit breaker

Info

Publication number: CN211788859U
Application number: CN202020786114.4U
Authority: CN
Inventors: 邵建国; 顾海峰; 殷杰
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-10-27
Anticipated expiration: 2030-05-13

Abstract

The utility model discloses a circuit breaker. The utility model discloses a circuit breaker comprises a temperature measuring unit for measuring the temperature of a circuit breaker wiring bar and a controller with a shell; the temperature measuring unit is electrically connected with the controller; and a mounting mechanism for fixedly mounting the temperature measuring unit is arranged on the shell of the controller, the temperature measuring unit is fixedly mounted on the shell of the controller through the mounting mechanism, and one end of the temperature measuring unit is in contact with the wiring bar. Compared with the prior art, the utility model discloses set up the temperature measurement unit on circuit breaker controller shell, need not to install temperature measuring device separately, just can realize circuit breaker wiring row temperature measurement, the structure is small and exquisite, installation, convenient to use.

Description

Circuit breaker

Technical Field

The utility model relates to a circuit breaker.

Background

In low voltage distribution system, intelligent circuit breaker uses very generally to often be in long-term circular telegram operating condition, appear phenomena such as moving and static contact wearing and tearing, fastener on the terminal connection row are not hard up easily. Under the condition, the contact resistance is increased, the temperature of the wiring bar is easily increased, if the wiring bar is not discovered and maintained in time, high temperature is generated, the performance of the circuit breaker is influenced, and even serious potential safety hazards such as fire of the circuit breaker can appear. For this reason, real-time temperature monitoring of the breaker bar is required.

Among the prior art, carry out real-time temperature monitoring to circuit breaker row of connecting, generally there are contact and non-contact two kinds, and the contact often needs install extra temperature measuring device additional on the row of connecting, realizes the monitoring to the temperature, if place the temperature measurement module on the row of connecting, perhaps installs temperature sensor additional on the row of connecting, and this all needs reserve the fixed orifices on the row of connecting, and this makes newly-increased temperature measurement function seem very passively on original row of connecting. The non-contact type sensor has a form using an infrared temperature sensor or using an optical fiber sensor, and the like, and the sensor needs to be installed and fixed, the position where the sensor is placed is required, and how to implement the sensor needs to be determined by combining with the structure of a field system. Above two kinds of forms all need additionally install temperature measuring device in the circuit breaker outside, have the installation inconvenient, the big scheduling problem of the construction degree of difficulty.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that it is not enough to overcome prior art, provide a structure small and exquisite, simple to operate need not use extra temperature measuring device's circuit breaker.

The utility model discloses specifically adopt following technical scheme to solve above-mentioned technical problem:

a circuit breaker includes a temperature measuring unit for measuring a temperature of a breaker terminal block, and a controller having a housing; the temperature measuring unit is electrically connected with the controller; and a mounting mechanism for fixedly mounting the temperature measuring unit is arranged on the shell of the controller, the temperature measuring unit is fixedly mounted on the shell of the controller through the mounting mechanism, and one end of the temperature measuring unit is in contact with the wiring bar.

Preferably, the mounting mechanism is a cavity which is arranged in a shell of the controller and one end of which is open.

Further preferably, the cavity is a cylindrical cavity.

Preferably, the temperature measuring unit includes a heat conductive metal case and a temperature sensor mounted in the heat conductive metal case.

Further preferably, the temperature sensor is a digital temperature sensor or a thermistor.

Further preferably, an elastic member is disposed between the temperature measuring unit and the housing of the controller, and the temperature measuring unit is brought into close contact with the breaker terminal block by a pressure generated by elastic deformation of the elastic member.

Still more preferably, the elastic member is a reaction spring.

Preferably, a convex pad for sleeving and installing the counter force spring is arranged on the surface of the temperature measuring unit.

Compared with the prior art, the utility model discloses technical scheme has following beneficial effect:

by adopting the above technical scheme, the temperature measurement unit sets up on circuit breaker controller shell, need not to install temperature measuring device separately, just can realize circuit breaker wiring row temperature measurement, and the structure is small and exquisite, installation, convenient to use.

Drawings

Fig. 1 and fig. 2 are schematic structural diagrams of a circuit breaker controller according to an embodiment of the present invention in a state where a temperature measurement unit is installed and not installed, respectively;

FIG. 3 is a schematic structural diagram of a temperature measurement unit in an exemplary embodiment;

FIG. 4 is a schematic diagram of a circuit in which the temperature measuring unit employs a digital temperature sensor;

fig. 5 is a schematic diagram of a circuit in which the temperature measuring unit employs a thermistor.

The specific meanings of the reference symbols in the figures are as follows:

1. the circuit breaker comprises a circuit breaker wiring bar, 2, an electronic circuit board of a controller, 3, a shell of the controller, 4, a columnar cavity, 5, a temperature measuring unit, 6, a data outgoing line, 7, a counter-force spring, 51, a temperature sensor, 52, a heat-conducting metal shell, 53, a convex pad, 54 and silica gel.

Detailed Description

Not enough to prior art, the utility model discloses a solution thinking is to be used for measuring the temperature measurement unit fixed mounting of circuit breaker wiring row temperature on circuit breaker controller's shell, need not to install temperature measuring device separately, just can realize circuit breaker wiring row temperature measurement, and the structure is small and exquisite, installation, convenient to use.

Particularly, the utility model discloses a circuit breaker, including the temperature measurement unit who is used for measuring circuit breaker wiring row temperature to and the controller that has the shell; the temperature measuring unit is electrically connected with the controller; and a mounting mechanism for fixedly mounting the temperature measuring unit is arranged on the shell of the controller, the temperature measuring unit is fixedly mounted on the shell of the controller through the mounting mechanism, and one end of the temperature measuring unit is in contact with the wiring bar.

The mounting mechanism may be disposed on an outer wall or an inner wall of the controller housing, and in order to further reduce the occupied space and make the controller structure more compact, preferably, the mounting mechanism is a cavity disposed in the housing of the controller and having an open end. Further preferably, the cavity is a cylindrical cavity.

Preferably, the temperature measuring unit includes a heat conductive metal case and a temperature sensor mounted in the heat conductive metal case. Further preferably, the temperature sensor is a digital temperature sensor for contact temperature measurement or a thermistor.

In order to make the measurement result of the temperature sensor for contact temperature measurement more accurate, an elastic component may be further disposed between the temperature measurement unit and the housing of the controller, and the temperature measurement unit is brought into close contact with the breaker connection bar by the pressure generated by elastic deformation of the elastic component. The elastic component can be a silicon steel sheet, a spring, an elastic plastic pad and the like, and is preferably a reaction spring.

The reaction spring may be fixedly mounted on the temperature measuring unit, or may be fixedly mounted on the housing of the controller, and preferably, a convex pad for mounting the reaction spring is disposed on the surface of the temperature measuring unit.

For the public understanding, the technical solution of the present invention is further explained in detail by a specific embodiment with reference to the attached drawings:

fig. 1 and fig. 2 respectively show the structure schematic diagrams of the circuit breaker controller in the present embodiment in the states of installation and non-installation of the temperature measurement unit, as shown in fig. 1 and fig. 2, the circuit breaker of the present embodiment includes a controller and a temperature measurement unit 5 for measuring the temperature of the circuit breaker terminal block 1, the controller includes a housing 3 and an electronic circuit board 2 disposed inside the housing 3; the temperature measuring unit 5 is electrically connected with the controller through a data outgoing line 6; and a mounting mechanism for fixedly mounting the temperature measuring unit 5 is arranged on the shell 3 of the controller, and the temperature measuring unit 5 is fixedly mounted on the shell of the controller through the mounting mechanism. The installation mechanism in this embodiment is a cylindrical cavity 4 which is arranged in the shell 3 of the controller and has an open end, the surface of the temperature measurement unit 5 is sleeved with a reaction spring 7, the other end of the reaction spring 7 is propped against the shell 3 of the controller, and the temperature measurement unit 5 and the circuit breaker wiring bar 1 can be in close contact with each other through pressure generated by elastic deformation of the reaction spring 7.

As shown in fig. 3, the temperature measuring unit 5 in the present embodiment is a columnar structure adapted to the columnar cavity 4, and includes a heat-conductive metal shell 52 made of a metal material with heat-conductive properties; the outer surface of the heat-conducting metal shell 52 is provided with a convex pad 53 for sleeving and installing the reaction spring 7; a countersunk hole is formed in the heat-conducting metal shell 52, a temperature sensor 51 (such as a digital temperature sensor or a thermistor) is arranged at the bottom of the countersunk hole, and temperature measurement data are transmitted to a rear-stage circuit through a data outgoing line 6 electrically connected with the temperature sensor 51; in this embodiment, the temperature sensor 51 is fixed inside the heat-conducting metal case 52 by potting with silica gel 54.

As shown in fig. 1 and 2, when the temperature measuring unit 5 is mounted, the temperature measuring unit 5 having one end of the temperature sensor 51 is directed to the breaker bar 1, the reaction spring 7 is mounted on the convex pad 53 of the temperature measuring unit 5, are arranged in a columnar cavity 4 arranged on the shell 3 of the circuit breaker controller together, one end of a counter-force spring 7 is contacted with the convex pad 53, the other end of the counter-force spring 7 is contacted with the shell 3 of the circuit breaker controller, a data outgoing line 6 connected with the temperature sensor 51 is led out to the outside through the columnar cavity 4 to be connected with an electronic circuit board 2 of the circuit breaker controller, temperature measurement data is transmitted to a single chip unit of the circuit breaker controller, the circuit breaker controller is then installed into the circuit breaker and the temperature measuring unit 5 with the temperature sensor end is placed directly against the circuit breaker terminal block 1. The temperature measuring unit 5 is in close contact with the circuit breaker wiring bar 1 by utilizing the pressed rebound of the counter spring 7, and the real-time temperature monitoring is carried out on the circuit breaker wiring bar 1. There is no need to provide screw holes or other devices or structures for fixing the temperature measuring unit on the breaker terminal block 1.

Fig. 4 shows a schematic circuit diagram of the temperature measuring unit 5 using a digital temperature sensor; as shown in fig. 4, two output pins of the data outgoing line of the digital temperature sensor are respectively connected to a pin GPIO of a single chip microcomputer of the circuit breaker controller and a ground pin. The GPIO pin of the single chip microcomputer is also provided with a pull-up resistor connected to a power supply circuit to supply power to the digital temperature sensor, the digital temperature sensor measures the temperature of the circuit breaker wiring bar in real time and converts the temperature into a digital pulse signal, and then the digital pulse signal is transmitted to the single chip microcomputer through a DQ pin of the digital temperature sensor, and the single chip microcomputer directly reads the digital pulse signal, calculates the number of pulses and directly converts the digital pulse signal into a temperature value. The display module controlled by the circuit breaker is a user interface and used for locally displaying the temperature of the temperature measuring point, and a communication module can be additionally arranged and connected with an upper computer to realize remote temperature reading.

Fig. 5 shows a schematic circuit diagram of a temperature measuring unit 5 using a thermistor. The thermistor needs to use an external operational amplifier OPA, the value of the temperature change sensed by the thermistor is processed and then sent to an A/D interface of the single chip microcomputer, and the single chip microcomputer performs sampling calculation processing on the signal.

The controller can realize the basic circuit protection and the real-time monitoring function of the temperature of the circuit breaker connecting bar, also has the additional functions of current measurement, voltage measurement, display, communication and the like, and can be set according to actual requirements.

Therefore, the utility model discloses technical scheme need not to install temperature measuring device separately, just can realize circuit breaker wiring row temperature measurement, and has that the structure is small and exquisite, installation, convenient to use's advantage that is showing.

Claims

1. A circuit breaker includes a temperature measuring unit for measuring a temperature of a breaker terminal block, and a controller having a housing; the temperature measuring unit is electrically connected with the controller; the temperature measuring device is characterized in that a mounting mechanism used for fixedly mounting the temperature measuring unit is arranged on a shell of the controller, the temperature measuring unit is fixedly mounted on the shell of the controller through the mounting mechanism, and one end of the temperature measuring unit is in contact with the wiring bar.

2. The circuit breaker of claim 1, wherein the mounting mechanism is a cavity disposed in a housing of the controller and open at one end.

3. The circuit breaker of claim 2, wherein the cavity is a cylindrical cavity.

4. The circuit breaker of claim 1, wherein the temperature measurement unit comprises a thermally conductive metal housing and a temperature sensor mounted within the thermally conductive metal housing.

5. The circuit breaker of claim 4, wherein the temperature sensor is a digital temperature sensor or a thermistor.

6. The circuit breaker according to claim 4, wherein an elastic member is provided between the temperature measuring unit and the case body of the controller, and the temperature measuring unit is brought into close contact with the breaker terminal block by a pressure generated by elastic deformation of the elastic member.

7. The circuit breaker of claim 6, wherein the resilient member is a reaction spring.

8. The circuit breaker according to claim 7, wherein the temperature measuring unit is provided at a surface thereof with a convex pad for fitting the reaction spring.