CN211205548U - Passive RFID temperature sensing device and high-voltage vacuum circuit breaker temperature measurement system - Google Patents

Abstract

The utility model relates to the technical field of power equipment monitoring, and more particularly, to a passive RFID temperature sensing device, comprising an RFID temperature sensor and a clip structure. The RFID temperature sensor is mounted on the clip structure, and the clip The clip feet of the structural parts can be firmly clamped on the steel sheet of the high-voltage vacuum circuit breaker, so that the RFID temperature sensor can be stably installed on the surface of the moving contact for temperature collection, which can not only ensure accurate temperature data collection, but also long-term The work will not be loose. The utility model also provides a temperature measurement system for a high-voltage vacuum circuit breaker. A passive RFID temperature sensing device is arranged on the surface of the moving contact of the high-voltage vacuum circuit breaker to collect temperature, and the data collector receives temperature data through a radio frequency gain antenna, and further Send it to the monitoring terminal, process and analyze the temperature data, predict possible potential safety hazards, and issue early warning signals in time.

Description

Passive RFID temperature sensing device and high voltage vacuum circuit breaker temperature measurement system

technical field

The utility model relates to the technical field of power equipment monitoring, in particular to a passive RFID temperature sensing device and a temperature measurement system for a high-voltage vacuum circuit breaker.

Background technique

As a switch device in the power supply and distribution system, the indoor high-voltage vacuum circuit breaker is responsible for controlling the on-off of the main circuit, and controls, protects, monitors and measures the power circuit. The contact part of the circuit breaker includes a moving contact and a static contact. When the moving and static contacts are closed and energized, the temperature of the corresponding metal part will rise. With the increase of the actual power load of the main line, the temperature of the contact part will gradually increase. Without advance warning, it is easy to cause high temperature and damage related equipment, and in severe cases, the power system will be paralyzed.

In order to ensure the safe operation of indoor high-voltage vacuum circuit breakers, a temperature measurement system is generally used to monitor them in real time, and an early warning signal can be issued in advance when the temperature exceeds the warning value. The temperature sensor in the temperature measurement system is generally fixedly connected to the moving contact to collect the temperature of the moving contact. There are two existing fixing methods for the temperature sensor, one is to fix the temperature sensor near the moving contact, and the other is to fix the temperature sensor on the surface of the moving contact. In the first fixing method, due to a certain distance between the temperature sensor and the moving contact, the collected temperature data is not accurate; in the second fixing method, although more accurate temperature data can be collected, due to the lack of suitable Components, resulting in the temperature sensor is not firmly fixed, easy to loose, using a fixed structure such as a screw buckle, it is more troublesome to disassemble. Therefore, there is a need for a temperature sensing device that can be firmly fixed on the movable contact for a long time and can be easily disassembled.

Utility model content

In view of this, the purpose of the present invention is to provide a passive RFID temperature sensing device, which can solve the above technical problems.

Another object of the present invention is to provide a temperature measurement system for high-voltage vacuum circuit breakers, which can monitor the temperature of indoor high-voltage vacuum circuit breakers, and provide early warning when abnormal.

In order to achieve the above object, the utility model provides the following technical solutions:

A passive RFID temperature sensing device, comprising:

The clip structure includes a mounting plate and a clip foot, the mounting plate has two sides, one of which is a mounting surface; the clip foot is a "徂"-shaped elastic clip plate structure, which is fixed by a horizontal plate and two vertical plates. connected, the side of the horizontal plate is connected with the first side of the mounting plate;

The RFID temperature sensor is arranged on the installation surface and includes an RFID temperature measuring unit and an RFID tag antenna.

Further, the clip structure also includes two fins, and the two fins are respectively connected with the two sides adjacent to the first side of the mounting plate, and the planes where the fins are located are respectively connected. There is an included angle with the plane where the installation surface is located.

Further, the included angle is 30°˜60°.

Further, the fins are elastic, and in a natural state, the plane where the fins are located and the plane where the mounting surface is located forms a first angle. A second included angle is formed between the planes where the surfaces are located, and the first included angle is greater than the second included angle.

Further, the mounting plate and the fin are integrally formed and made of beryllium copper.

Further, a thermally conductive silicone pad is arranged between the mounting plate and the RFID temperature sensor.

Further, a high temperature resistant protective cover is provided outside the RFID temperature sensor.

Further, the high temperature resistant protective sleeve is a high temperature resistant silicone sleeve disposed outside the RFID temperature sensor, and the gap between the high temperature resistant silicone sleeve and the mounting plate is filled and sealed with high temperature resistant thermally conductive epoxy resin glue. .

A temperature measurement system for a high-voltage vacuum circuit breaker, comprising the above-mentioned passive RFID temperature sensing device, a radio frequency gain antenna and a data collector; the passive RFID temperature sensing device is detachably clamped to a high-voltage vacuum through the clip feet The surface of the moving contact of the circuit breaker is used to receive the temperature measurement instruction sent by the data collector, and send the temperature data to the data collector; the radio frequency gain antenna is connected to the data collector, and is arranged on the The position within the communication distance of the passive RFID temperature sensing device, the data collector sends a temperature measurement instruction and provides energy to the passive RFID temperature sensing device through the radio frequency gain antenna.

Further, it also includes a monitoring terminal, which is connected to the data collector and used to acquire the temperature data and determine whether the pre-warning value is exceeded, and an alarm signal is issued if the pre-warning value is exceeded.

The utility model provides a passive RFID temperature sensing device, comprising an RFID temperature sensor and a clip structure, wherein the RFID temperature sensor is installed on the clip structure, and the clip feet of the clip structure can be firmly clamped to a high voltage On the steel sheet of the vacuum circuit breaker, the RFID temperature sensor can be stably set on the surface of the moving contact for temperature collection, which can not only ensure accurate temperature data collection, but also will not loosen during long-term work. In addition, the clip legs of the clip structure have elasticity and can be clipped on movable contacts of different sizes, and have a wide range of applications. The RFID temperature sensor in the passive RFID temperature sensing device provided by the utility model uses the passive RFID radio frequency technology for wireless data transmission, does not need an integrated battery, is small in size and light in weight, and can be easily fixed in the moving The contact surface is not easy to loosen.

The utility model also provides a temperature measurement system for a high-voltage vacuum circuit breaker, comprising the passive RFID temperature sensing device, a radio frequency gain antenna and a data collector. The passive RFID temperature sensing device is installed on the surface of the moving contact of the high-voltage vacuum circuit breaker to collect temperature. The data collector receives temperature data through the radio frequency gain antenna on the one hand, and supplies power to the passive RFID temperature sensing device on the other hand. The temperature data obtained by the data collector can further be sent to other monitoring terminals in a wired or wireless manner. The monitoring terminal processes and analyzes the temperature data, predicts possible potential safety hazards, and issues early warning signals in time.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts.

Fig. 1 is the schematic diagram of the passive RFID temperature sensing device in the utility model before being clamped to the moving contact;

Fig. 2 is the structural representation of the clip structure in the utility model;

Fig. 3 is the schematic diagram of the included angle between the fin and the mounting surface in the utility model;

4 is a schematic diagram of the passive RFID temperature sensing device in the utility model after being clamped to the movable contact;

5 is a schematic diagram of an RFID temperature sensor in an embodiment of the present invention;

6 is a schematic diagram of the temperature measurement system of the medium and high voltage vacuum circuit breaker of the present invention.

Reference numerals: 100-passive RFID temperature sensing device, 110-clamping structure, 111-mounting plate, 112-clamping foot, 1121-transverse plate, 1122-rising plate, 1123-clamping foot, 113-wing plate , 120-RFID temperature sensor, 121-RFID temperature measurement unit, 122-RFID tag antenna, 200-moving contact, 300-radio frequency gain antenna, 400-data collector, 500-monitoring terminal.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to 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 implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Fig. 1 is a schematic diagram of the passive RFID temperature sensing device in the utility model before being clamped to the movable contact; Fig. 2 is a schematic structural diagram of a clip structure in the utility model; Fig. 3 is a middle fin and installation in the utility model Schematic diagram of the angle between the surfaces; FIG. 4 is a schematic diagram of the passive RFID temperature sensing device in the utility model after being clamped to the moving contact; FIG. 5 is a schematic diagram of an RFID temperature sensor in an embodiment of the utility model; FIG. 6 It is a schematic diagram of the temperature measurement system of the medium and high voltage vacuum circuit breaker of the present invention.

As shown in FIG. 1 and FIG. 2 , a passive RFID temperature sensing device 100 includes a clip structure 110 and an RFID temperature sensor 120 . The RFID temperature sensor 120 is fixed on the clip structure 110, and then the clip structure 110 is clipped on the moving contact 200 of the high-voltage vacuum circuit breaker, so that the RFID temperature sensor 120 is arranged on the The surface of the moving contact 200 is described, and temperature data is collected.

The clip structure 110 includes a mounting plate 111 and clip feet 112 . The mounting plate 111 is a thin plate structure with two sides, one of which is the mounting surface, the RFID temperature sensor 120 is fixed on the mounting surface, and the other is the contact surface that contacts the movable contact 200 surface. The clip foot 112 is a "傂"-shaped elastic splint structure, with one horizontal plate 1121 and two vertical plates 1122 . The clamping feet 112 are fixedly connected with the mounting plate 111 , and the two are connected by a side edge of each. The horizontal plate 1121 has two sides, both of which can be used as the sides connected to the mounting plate 111 . The mounting plate 111 has four sides, and the four sides can also be used as the sides connected to the horizontal plate 1121. For the convenience of description, the side of the mounting plate 111 that is connected to the horizontal plate 1121 is particularly used here. called the first side.

In addition, in order to make the clip legs 112 more stably clip on the movable contact 200, clip legs 1123 can also be formed on the movable end of the vertical plate 1122. The simple processing method is as follows: two vertical The movable ends of the plate 1122 are respectively bent inward to form the latching legs 1123 .

The clip feet 112 on the clip structure 110 are elastic, and the distance between the two vertical plates 1122 can be increased after being stressed, so that they can be firmly clamped on the steel sheet of the movable contact 200 . At this time, the contact surface of the mounting plate 111 is in contact with the surface of the moving contact 200, and then the heat generated by the moving contact 200 is conducted to the RFID temperature sensor 120 to realize temperature collection. Therefore, the installation of the present invention The board 111 is made of a thermally conductive material, such as a metal material. Preferably, the mounting board 111 is made of beryllium copper.

In order to further improve the stability of the clip structure 110 , two opposite sides of the mounting plate 111 may be connected with fins 113 respectively. Since the clip 112 is connected to the first side of the mounting plate 111, the fins 113 are connected to the two adjacent sides of the first side, and the plane of the fins 113 is close to the plane of the first side. The planes where the mounting plates 111 are located form a certain angle α, and generally, the fins 113 extend obliquely toward the direction of the contact surface of the mounting plate 111 . When the mounting plate 111 is in contact with the movable contact 200 , the fins 113 are respectively supported on the annular surfaces of the contact heads on both sides of the mounting plate 111 to provide support for the mounting plate 111 . As shown in FIG. 3 , the included angle α is preferably 30°˜60°.

In addition, the fins 113 are preferably made of a thermally conductive material, so that the heat on the surface of the movable contact 200 can be conducted to the mounting plate 111 , thereby increasing the thermal conductivity of the clip structure 110 . Considering the stability of the structure and the difficulty of processing, the fins 113 can be made of the same material as the mounting plate 111, and are integrally formed. It is made by forming and processing, which not only ensures the stability of the overall structure, but also greatly reduces the processing difficulty.

Further, after the structure of the fins 113 is added, in order to make the clip structure 110 suitable for moving contacts 200 with different diameters/surface curvatures, the fins 113 can be configured as elastic pieces. When the clip structure 110 is fastened on the movable contact 200, the fins 113 are subjected to the upward force on the annular surface of the movable contact 200, and the fins 113 are deformed and can be connected with the movable contact 200. The surfaces of the moving contacts 200 are in closer contact. More specifically, in a natural state, a first angle is formed between the plane where the fins 113 are located and the plane where the mounting surface is located. When an external force is applied, the plane where the fins 113 are located and the mounting surface are located A second included angle is formed between the planes, and the first included angle is greater than the second included angle.

As shown in FIG. 1 and FIG. 4 , the installation process of the clip structure 110: clip the clip feet 112 on the steel sheet of the moving contact 200 of the vacuum circuit breaker, press down hard, when a "click" sound is heard, It means that the clamping feet 1123 have sunk into the steel sheet, the clamping feet 112 have been clamped, and the fins 113 are supported on the annular outer diameter of the movable contact 200. At this time, the clamping structure 110 The whole is firmly clamped on the movable contact 200 .

The RFID temperature sensor 120 is disposed on the installation surface and is used to collect temperature data of the movable contact 200 . The RFID temperature sensor 120 includes an RFID temperature measuring unit 121 and an RFID tag antenna 122 . The RFID temperature measuring unit 121 further includes a temperature sensing chip, a temperature measuring circuit and a passive RFID circuit. After the temperature measurement circuit receives the temperature measurement instruction, it drives the temperature sensing chip to obtain the temperature data of the moving contact 200; after the passive RFID circuit obtains the temperature data from the temperature measurement circuit, it passes the temperature data through the The RFID tag antenna 122 sends the temperature data to the corresponding reader.

In an embodiment of the present invention, as shown in FIG. 5 , the RFID temperature sensor 120 has a cuboid casing, the RFID temperature measuring unit 121 is arranged inside the casing, and the RFID tag antenna 122 is arranged in the casing on the top surface. The shape of the casing is not specifically limited here, as long as it can protect the internal devices.

In order to increase the thermal conductivity between the mounting board 111 and the RFID temperature sensor 120 , a thermal pad may also be arranged between the mounting board 111 and the RFID temperature sensor 120 , and the material of the thermal pad is different here. As a limitation, it is preferable to use thermally conductive silicone to make a thermally conductive silicone pad.

In this embodiment, in order to further protect the RFID temperature sensor 120 , a high temperature resistant protective cover is also provided outside the RFID temperature sensor 120 . The high temperature resistant protective sleeve is made of high temperature resistant silica gel as a whole, and the gap between the high temperature resistant silicone sleeve and the mounting plate 111 is filled and sealed with high temperature resistant thermally conductive epoxy resin glue, so as to ensure that there is no obvious connection position. air gap.

As shown in FIG. 6 , a temperature measurement system for a high-voltage vacuum circuit breaker includes the above-mentioned passive RFID temperature sensing device 100 , a radio frequency gain antenna 300 and a data collector 400 .

The passive RFID temperature sensing device 100 is detachably clamped to the surface of the moving contact 200 of the high-voltage vacuum circuit breaker through the clip feet 112, and is used to receive the temperature measurement instruction sent by the data collector 400, and to The temperature data is sent to the data collector 400 .

The radio frequency gain antenna 300 is connected to the data collector 400 and is arranged at a position within a communication distance from the passive RFID temperature sensing device 100 . The data collector 400 sends a temperature measurement instruction to the passive RFID temperature sensing device 100 through the radio frequency gain antenna 300 , and provides the passive RFID temperature sensing device 100 with required energy.

Further, the temperature measurement system further includes a monitoring terminal 500 connected to the data collector 400 for acquiring the temperature data and judging whether the warning value is exceeded, and an alarm signal is issued if the warning value is exceeded.

The monitoring terminal 500 may be an existing intelligent terminal, with built-in corresponding software programs, controlled by humans or set a certain monitoring frequency, continuously sending control instructions to the data collector 400, and using the data collector 400 to send control instructions to the data collector 400. The passive RFID temperature sensing device 100 sends a temperature measurement instruction, the temperature data collected by the passive RFID temperature sensing device 100 is sent by the RFID tag antenna 122, and then the data collector 400 passes the radio frequency gain antenna. 300 to receive, the monitoring terminal 500 then accesses the data collector 400 to obtain temperature data. An early warning value can be set inside the monitoring terminal 500, and the early warning value can be a specific temperature value or a temperature range. When the measured temperature exceeds the temperature value or is not within the temperature range, it means that the movement The temperature of the contact 200 is abnormal, thereby sending out an alarm signal.

The connection between the monitoring terminal 500 and the data collector 400 may be wired or wireless, for example, the monitoring terminal 500 accesses and obtains temperature data through the 485 communication interface on the data collector 400, or through WIFI, Bluetooth, etc. Obtain temperature data wirelessly.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A passive RFID temperature sensing device, comprising:

the clamping and buckling structural part comprises a mounting plate and clamping legs, wherein the mounting plate is provided with two side surfaces, and one side surface is a mounting surface; the clamping feet are in an Jiong-shaped elastic clamping plate structure and are formed by fixedly connecting a transverse plate and two vertical plates, and the side edge of the transverse plate is connected with the first side edge of the mounting plate;

and the RFID temperature sensor is arranged on the mounting surface and comprises an RFID temperature measuring unit and an RFID tag antenna.

2. The passive RFID temperature sensing device of claim 1, wherein the clip structure further comprises two tabs, wherein the two tabs are oppositely connected to two sides of the mounting plate adjacent to the first side of the mounting plate, and wherein an included angle is formed between a plane of the tabs and a plane of the mounting surface.

3. The passive RFID temperature sensing device of claim 2, wherein the included angle is 30 ° to 60 °.

4. The passive RFID temperature sensing device of claim 3, wherein the tab is resilient, and in a natural state, a plane of the tab and a plane of the mounting surface form a first included angle, and when an external force is applied, a plane of the tab and a plane of the mounting surface form a second included angle, and the first included angle is greater than the second included angle.

5. The passive RFID temperature sensing device of claim 2, wherein the mounting plate and the fin are integrally formed and are made of beryllium copper.

6. The passive RFID temperature sensing device of any of claims 1-5, wherein a thermally conductive silicone pad is disposed between the mounting plate and the RFID temperature sensor.

7. The passive RFID temperature sensing device of claim 6, wherein the RFID temperature sensor is externally provided with a high temperature resistant protective sheath.

8. The passive RFID temperature sensing device of claim 7, wherein the high temperature resistant protective sleeve is a high temperature resistant silicone sleeve disposed outside the RFID temperature sensor, and a gap at a connection between the high temperature resistant silicone sleeve and the mounting board is filled and sealed with a high temperature resistant heat conductive epoxy glue.

9. A temperature measurement system of a high-voltage vacuum circuit breaker is characterized by comprising a passive RFID temperature sensing device as claimed in any one of claims 1-8, a radio frequency gain antenna and a data acquisition unit; the passive RFID temperature sensing device is detachably clamped on the surface of a moving contact of the high-voltage vacuum circuit breaker through the clamping pins, and is used for receiving a temperature measurement instruction sent by the data acquisition unit and sending temperature data to the data acquisition unit; the radio frequency gain antenna is connected with the data collector and arranged at a position within communication distance with the passive RFID temperature sensing device, and the data collector sends a temperature measurement instruction to the passive RFID temperature sensing device through the radio frequency gain antenna and provides energy.

10. The system for measuring the temperature of the high-voltage vacuum circuit breaker according to claim 9, further comprising a monitoring terminal connected to the data collector and configured to acquire the temperature data, determine whether the temperature data exceeds an early warning value, and send an alarm signal if the temperature data exceeds the early warning value.

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