Circuit breaker temperature collection device installation structure

Abstract

A circuit breaker temperature acquisition device installation structure, the installation structure comprising a base (1), a moving contact (2), a stationary contact (3) and a temperature detection module (4), wherein the contact and disconnection of the moving contact (2) and the stationary contact (3) can control the on and off of the circuit breaker current, and the temperature detection module (4) can detect the temperature when the moving contact (2) and the stationary contact (3) are in contact and disconnected, and output a detection signal representing the temperature value, characterized in that: the temperature detection module (4) is mounted on the base (1), and the detection contact end (401) of the temperature detection module (4) is located between the moving contact (2) and the stationary contact (3). The structure comprises a temperature detection module, which improves the safety of the temperature sensor, so that the insulation between the temperature detection module and the main circuit does not need to be considered during maintenance. The circuit breaker temperature acquisition device installation structure does not require modification of the circuit breaker structure or only requires minor modifications to the circuit breaker to add a temperature detection function.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit breakers, and specifically relates to a device for monitoring the internal temperature of a circuit breaker, and in particular to an installation structure of a circuit breaker temperature acquisition device. Background Art

[0002] Generally, a circuit breaker is an electrical protection device installed between a power source and a load unit to protect load units such as motors, transformers, and transmission lines from damage caused by abnormal currents (i.e., large currents caused by, for example, short circuits and ground faults) generated in circuits such as power transmission / distribution lines and private substations. The circuit breaker can open or close the circuit under normal use conditions, and can also open or close the transmission line from a distance using an electric operating mechanism, and automatically break the transmission line in the event of overcurrent and short circuit to protect power facilities and load units.

[0003] When the circuit breaker is closed, it carries current, and the temperature at the contact point between the moving contact and the static contact is the highest. When the temperature of the circuit breaker exceeds the safe range, the safety of the circuit breaker may be reduced or even damaged. Therefore, it is necessary to monitor the temperature inside the circuit breaker, especially the temperature at the contact point of the circuit breaker, so that users can detect the over-high temperature of the circuit breaker as soon as possible and take timely countermeasures.

[0004] Chinese patent ZL201620122924.3 discloses a temperature acquisition device for a circuit breaker, including a sensor and a housing, a busbar is installed in the housing, the sensor is connected to a contact, the surface of the contact is in contact with the surface of the busbar, and the contact can conduct the temperature on the busbar to the sensor to complete the temperature acquisition of the busbar. The busbar of the temperature acquisition device of the circuit breaker is far away from the contact point between the moving contact and the static contact, and cannot reflect the real temperature of the contact point between the moving contact and the static contact in time. In addition, it is inconvenient to install a temperature sensor at the busbar of the main circuit, which is not conducive to adding a temperature monitoring function to the existing circuit breaker.

[0005] Chinese patent ZL200810210850.9 discloses an air circuit breaker with a temperature sensor, comprising: a temperature sensor, which detects temperature by inserting into a sensor insertion hole formed on a base module; and a temperature display, which displays the value detected by the temperature sensor as the temperature of the conduction unit, thereby always monitoring the temperature inside the circuit breaker to prevent damage caused by overheating of the conduction unit. Since the temperature sensor of the air circuit breaker cannot directly detect the conductive circuit of the circuit breaker, and the heat dissipation speed of the air is not fast, the measured temperature has a large error with the contact temperature. In addition, a hole is required on the base module to insert the sensor, so it is inconvenient to install the temperature sensor, which is not conducive to adding a temperature monitoring function to the existing circuit breaker.

[0006] Chinese patent ZL201110305664.5 discloses a circuit breaker temperature detection device, in which a cavity is provided between a stationary contact and a bottom plate, and a temperature sensor is located in the cavity. A plastic cover is provided between the stationary contact and the temperature sensor, which can fix the temperature sensor to prevent it from falling off, and at the same time, the temperature sensor can be insulated from the stationary contact. The temperature sensor of the circuit breaker temperature detection device is located in the cavity between the stationary contact and the bottom plate, so it is inconvenient to install the temperature sensor, which is not conducive to adding a temperature monitoring function to the existing circuit breaker. In addition, a plastic cover is added between the stationary contact and the temperature sensor to insulate the temperature sensor from the stationary contact, and the temperature sensor is not in direct contact with the stationary contact, so the measured contact temperature also has errors. The temperature sensor in the circuit breaker temperature detection device is not in direct contact with the stationary contact, mainly considering the following two factors: one is due to the insulation requirements of the temperature sensor. Since the temperature sensor is in contact with the main circuit for a long time, if the insulation performance of the temperature sensor does not meet the requirements, the insulation may be broken down when it is subjected to the main circuit voltage for a long time. The second is the safety requirements during maintenance. During maintenance, maintenance personnel may come into contact with the conductive part of the temperature sensor. If the temperature sensor is in direct contact with the static contact of the main circuit, when the circuit breaker is open, the conductive part of the temperature sensor will be energized because the static contact is directly connected to the power supply, which is unsafe for maintenance personnel. Since the moving contact is a moving part, it is difficult to directly install the temperature sensor. Summary of the invention

[0007] The purpose of the present invention is to provide a circuit breaker temperature acquisition device installation structure in view of the technical defects of the above-mentioned existing circuit breaker temperature sensors. The structure includes a temperature detection module. The temperature detection module directly contacts the main circuit near the contact point between the moving contact and the static contact to perform temperature detection, and the temperature detection module is separated from the main circuit when the circuit breaker is opened, which improves the safety of the temperature sensor, so there is no need to consider the insulation between the temperature detection module and the main circuit during maintenance. The circuit breaker temperature acquisition device installation structure does not require modification of the circuit breaker structure or only requires minor modifications to the circuit breaker to add a temperature detection function.

[0008] Technical Solution

[0009] In order to achieve the above technical objectives in the future, the present invention designs a circuit breaker temperature collection device installation structure, which includes a base, a moving contact, a static contact and a temperature detection module. The contact and disconnection of the moving contact and the static contact can control the on and off of the circuit breaker current. The temperature detection module can detect the temperature when the moving contact and the static contact are in contact and disconnected, and output a detection signal representing the temperature value. It is characterized in that: the temperature detection module is installed on the base, and the detection contact end of the temperature detection module is located between the moving contact and the static contact.

[0010] Furthermore, the temperature detection module includes a temperature sensor and a detection contact end, and the detection contact end is a spring.

[0011] Furthermore, the temperature detection module is of split type, one end of the detection contact end is mounted in the mounting hole of the temperature sensor by a fastener, and the other end is located between the moving contact and the stationary contact.

[0012] Furthermore, the temperature sensor and the detection contact end are integrated.

[0013] Preferably, the spring piece is copper or rubber magnet.

[0014] Beneficial Effects

[0015] The present invention provides a circuit breaker temperature acquisition device installation structure. The structure includes a temperature detection module. The temperature detection module directly contacts the main circuit near the contact point between the moving contact and the static contact to perform temperature detection, and the temperature detection module is separated from the main circuit when the circuit breaker is opened, thereby improving the safety of the temperature sensor, so there is no need to consider the insulation between the temperature detection module and the main circuit during maintenance. The circuit breaker temperature acquisition device installation structure does not require modification of the circuit breaker structure or only requires minor modifications to the circuit breaker to add a temperature detection function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a structural schematic diagram of the circuit breaker in the open state in embodiment 1 of the invention.

[0017] Attached Figure 2 It is a structural schematic diagram of the circuit breaker in the switching state in embodiment 1 of the invention.

[0018] Attached Figure 3 It is a structural schematic diagram of the temperature detection module in embodiment 1 of the invention.

[0019] Attached Figure 4 It is a structural schematic diagram of the temperature detection module in embodiment 2 of the invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Example 1

[0022] The installation structure of the circuit breaker temperature collection device includes a base 1, a moving contact 2, a stationary contact 3 and a temperature detection module 4. The contact and disconnection of the moving contact 2 and the stationary contact 3 can control the on and off of the circuit breaker current. The temperature detection module 4 can detect the temperature when the moving contact 2 and the stationary contact 3 are in contact and disconnected, and output a detection signal representing the temperature value, wherein the temperature detection module 4 is installed on the base 1, and the detection contact end 401 of the temperature detection module 4 is located between the moving contact 2 and the stationary contact 3.

[0023] The temperature detection module 4 includes a temperature sensor 402 and a detection contact end 401. The detection contact end 401 is a spring, and the material can be metal, non-metal, or a combination of metal and non-metal. The metal is preferably copper, and the non-metal is preferably rubber magnet.

[0024] As attached Figure 3 As shown, the temperature detection module 4 is of split type, one end of the detection contact end 401 is mounted in the mounting hole 402 a of the temperature sensor 402 by a fastener 5 , and the other end is located between the moving contact 2 and the stationary contact 3 .

[0025] As attached Figure 1 As described above, when the circuit breaker is opened, the detection contact end 401 is between the moving contact 2 and the stationary contact 3 and does not contact the moving contact 2 .

[0026] As attached Figure 2 As shown, when the circuit breaker starts to close, the moving contact 2 rotates toward the stationary contact 3. During the rotation, the moving contact 2 hits the detection contact end 401, and the moving contact 2 continues to rotate. Since the detection contact end 401 is elastic, as the moving contact 2 rotates, the detection contact end 401 is compressed and bent, generating elastic deformation, and reliably contacts the moving contact 2. When the circuit breaker is completely closed, the detection contact end 401 is between the moving contact 2 and the stationary contact 3, and reliably contacts the moving contact 2.

[0027] As attached Figure 2 As shown, when the circuit breaker is closed, since the moving contact 2 and the stationary contact 3 are connected, current flows through the moving contact 2, and the temperature of the moving contact 2 rises. Since the detection contact end 401 is in reliable contact with the moving contact 2, the temperature of the moving contact 2 is directly detected by the temperature sensor 402 through the detection contact end 401. The temperature sensor 402 has good insulation performance, and the insulation performance of the temperature sensor 402 will not fail when the circuit breaker is powered on for a long time.

[0028] As attached Figure 1As shown, when the circuit breaker is opened, since the moving contact 2 and the stationary contact 3 are disconnected, no current flows through the moving contact 2. Since the detection contact end 401 is not in contact with the moving contact 2, the temperature detection module 4 is separated from the main circuit, and the conductive part of the temperature detection module 4 is not energized, thereby improving safety during maintenance.

[0029] Example 2

[0030] As attached Figure 4 As shown, another embodiment provided by the present invention is that the temperature sensor 402 and the detection contact end 401 are integrated. Its working principle is the same as that of embodiment 1 and will not be further explained here.

[0031] The structures, proportions, sizes, quantities, etc. illustrated in the accompanying drawings of the embodiments of the present invention are only used to match the contents disclosed in the specification so as to be understood and read by those familiar with the technology, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects that the present invention can produce and the purposes that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise", etc. cited in this specification are only for the convenience of narration, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

Claims

1. A circuit breaker temperature acquisition device installation structure, the installation structure comprising a base (1), a moving contact (2), a stationary contact (3) and a temperature detection module (4), wherein the contact and disconnection of the moving contact (2) and the stationary contact (3) can control the on and off of the circuit breaker current, and the temperature detection module (4) can detect the temperature when the moving contact (2) and the stationary contact (3) are in contact and disconnected, and output a detection signal representing the temperature value, characterized in that: The temperature detection module (4) is mounted on the base (1), and the detection contact end (401) of the temperature detection module (4) is located between the moving contact (2) and the stationary contact (3); The temperature detection module (4) comprises a temperature sensor (402) and a detection contact end (401), wherein the detection contact end (401) is a spring; When the circuit breaker is opened, the detection contact end (401) is between the moving contact (2) and the stationary contact (3) and does not contact the moving contact (2); When the circuit breaker starts to close, the moving contact (2) rotates in the direction of the stationary contact (3). During the rotation, the moving contact (2) hits the detection contact end (401). The moving contact (2) continues to rotate. As the moving contact (2) rotates, the detection contact end (401) is compressed and bent, generating elastic deformation and contacting the moving contact (2). When the circuit breaker is closed, the detection contact end (401) is between the moving contact (2) and the stationary contact (3), and is in contact with the moving contact (2).

2. The circuit breaker temperature collection device installation structure according to claim 1, characterized in that: The temperature detection module (4) is of a split type, one end of the detection contact end (401) is mounted in the mounting hole (402a) of the temperature sensor (402) by a fastener (5), and the other end is located between the moving contact (2) and the stationary contact (3).

3. The circuit breaker temperature collection device installation structure according to claim 1, characterized in that: The temperature sensor (402) and the detection contact end (401) are integrated.

4. The circuit breaker temperature collection device installation structure according to claim 1, characterized in that: The spring piece is copper or rubber magnet.

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