Sensor fixing device for temperature measurement system of power distribution cabinet body and sensor

Abstract

The utility model discloses a sensor fixing device for a temperature measurement system of a power distribution cabinet body. The sensor fixing device comprises a plug connector and a stop block which are matched with each other, the plug connector is of a U-shaped structure, a groove used for installing a chip is formed in the middle of the rear side face of the check block, the two sides of the groove are each provided with a set of clamping grooves used for allowing supporting legs of the U-shaped structure to penetrate through, each clamping groove is of a front-back-through structure, and the side wall of each set of clamping grooves is provided with a set screw used for abutting against the corresponding supporting leg of the U-shaped structure. In the device, the chip of the sensor is connected with the fin of the moving contact through the buckle structure, so that the moving contact is not damaged.

Description

Technical Field

[0001] This utility model relates to the field of power system components, specifically to a sensor fixing device and sensor for a temperature measurement system of a power distribution cabinet. Background Technology

[0002] Every conductive node in a power system carries the risk of temperature rise. Throughout the entire transmission process, from power plants to transmission and transformation equipment and finally to end-user appliances, temperature monitoring and early warning are crucial, especially at the moving contact connections of high-voltage equipment. However, temperature monitoring points on high-voltage substations operate in environments with high voltage, high current, and strong magnetic fields; some are even located in enclosed spaces, facing challenges such as strong electromagnetic noise, high-voltage insulation issues, or spatial limitations. This places high demands on the passive and reliable nature of monitoring products. Existing temperature measurement technologies primarily rely on infrared and fiber optic methods. Infrared measurement equipment is bulky and costly, making it unsuitable for node temperature measurement in complex environments. Fiber optic measurement is cumbersome to deploy, requires complex maintenance, lacks system flexibility, and is difficult to implement on a large scale.

[0003] The utility model patent with publication number CN222318237U discloses a wireless temperature measurement device. The device installs the temperature probe on the inner surface of a ring-shaped alloy sheet, and connects the alloy sheet into a ring with screws. The ring is then tied to the stationary contact of the busbar or the cable overlap of the isolating switch in the high-voltage switchgear. However, this method will damage the structure of the moving contact of the switchgear. Utility Model Content

[0004] To address the aforementioned issues, this invention proposes a sensor fixing device and a sensor for a temperature measurement system in a power distribution cabinet. In this device, the sensor chip and the fins of the moving contact are connected via a snap-fit ​​structure, which will not damage the moving contact.

[0005] A sensor fixing device for a temperature measurement system in a power distribution cabinet includes a connector and a stop that cooperate with each other; the connector is U-shaped, and the middle part of the rear side of the stop is provided with a groove for installing a chip. Each side of the groove is provided with a set of slots for inserting the U-shaped support legs. The slots are open from front to back, and each set of slots is provided with a set screw on its side wall for tightening the U-shaped support legs.

[0006] Preferably, a clamping plate is provided on the inner side of the closed end of the U-shaped structure.

[0007] Preferably, an abutment block is provided on the inner side of the closed end of the U-shaped structure, and the tightening piece is located on the outer side of the abutment block.

[0008] Preferably, the U-shaped support leg is provided with an auxiliary snap-fit ​​piece on the outer side near the closed end of the U-shaped structure.

[0009] Preferably, both the top clamping piece and the auxiliary snap-fit ​​piece are elastic pieces with one end connected to the U-shaped structure body and the other end suspended.

[0010] Preferably, the upper and lower sidewalls of the slot are provided with elastic locking members for clamping the U-shaped structural legs.

[0011] This utility model also discloses a sensor for a temperature measurement system of a power distribution cabinet, including the fixing device as described above, wherein a chip is installed in the groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention uses interlocking connectors and stops to fix the sensor onto the fins of the moving contact. The fixing device only connects to two adjacent fins, making installation convenient and the connection secure. This avoids the problem of fin damage caused by the ring alloy sheet being tied to the outside of all fins of the moving contact in the prior art, which applies lateral force to the fins. At the same time, the tightening plate and auxiliary locking plate ensure that the chip is firmly attached to the fins, enhancing contact stability. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a structural diagram of a sensor mounted on a moving contact in the prior art;

[0016] Figure 2 This is a structural diagram of the sensor mounted on the moving contact disclosed in this utility model;

[0017] Figure 3 This is an overall structural diagram of the sensor fixing device in this utility model;

[0018] Figure 4 This is a diagram of the connector structure;

[0019] Figure 5 This is a diagram of the block structure;

[0020] Figure 6 This is a structural diagram of the sensor after the chip has been installed on the fixed device;

[0021] In the diagram, 1. Fin, 2. Connector, 3. Stop, 4. Abutment block, 5. Tightening plate, 6. Auxiliary snap-fit ​​plate, 7. Support leg, 8. Groove, 9. Slot, 10. RF chip, 11. Existing temperature sensor, 12. Set screw. Detailed Implementation

[0022] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0023] Example 1

[0024] like Figure 1 As shown, the moving contact is a cylindrical structure composed of multiple fins 1 arranged in a ring. Existing temperature sensors 11 use annular alloy sheets with chips on the inner surface to bind the cylindrical structure to the outside. In this structure, if the binding is too loose, the chip will not make good contact with the fins, affecting the test. If the binding is too tight, it will generate a large lateral force on the fins, damaging them and consequently the entire moving contact. Therefore, this utility model discloses a... Figure 3-5 The sensor fixing device shown is for a temperature measurement system in a power distribution cabinet. The device includes a connector 2 and a stop 3 that cooperate with each other. The connector 2 has a U-shaped structure. The two legs 7 of the U-shaped structure extend from the inside to the outside into the gap between two adjacent fins 1 of the driven contact, and then are inserted into the slot 9 of the stop 3 and fixed in position with a set screw 12. The entire device is then firmly engaged with the fins 1. Since the engaging part is elastic, it will produce slight deformation, so it will not exert a rigid lateral force on the fins 1, thus preventing damage to the fins 1.

[0025] A groove 8 for installing a chip is provided in the middle part of the rear side of the stop block 3. A set of slots 9 for cooperating with the support leg 7 is provided on each side of the groove 8. The slots 9 have a structure that is open from front to back. That is, when the support leg 7 is inserted into the slot 9 from back to front, the support leg 7 is squeezed and pushed into the front side of the slot. Since the set screw 12 secures the support leg, the support leg 7 cannot move backward.

[0026] To further ensure the secure connection and ensure that the chip 10 and the fin 1 are firmly in contact, an elastic clamping piece 5 is provided on the inner side of the closed end of the U-shaped structure. The clamping piece has one end connected to the closed end of the U-shaped structure and the other end is a certain distance away from the closed end of the U-shaped structure. That is, the clamping piece 5 is connected to the closed end of the U-shaped structure at an acute angle. An abutment block 4 is provided on the closed end of the U-shaped structure. When the plug 2 is inserted through the gap between two adjacent fins 1 of the moving contact and is clamped with the stop block 3, the inner side of the fin 1 will squeeze the clamping piece 5, the clamping piece 5 will deform and move backward to abut against the abutment block 4. After the stop block 3 and the plug 2 are clamped, the clamping piece 5 tends to move forward under the action of the restoring force. Together with the stop block 3 on the outer side of the fin 1, it firmly hugs the fin 1. However, this hugging only hugs one fin and applies force along the extension direction of the fin. It will not generate lateral force on the fin, so it will not damage the fin.

[0027] To prevent longitudinal movement, elastic auxiliary locking pieces 6 are provided on the outer surfaces of the two legs 7 near the closed ends of the U-shaped structure. Each auxiliary locking piece 6 is an elastic piece with one end connected to the leg 7 and the other end suspended. The auxiliary locking pieces 6 on the two legs 7 lock the corresponding fins 1 along the extension direction of the fins 1.

[0028] To further enhance the snap-fit ​​performance, elastic snap-fit ​​components are provided on the upper and lower side walls of the slot 9. These elastic snap-fit ​​components, together with the upper or lower side wall of the slot 9, form a T-shaped structure to hold the upper and lower sides of the support leg 7 in place and prevent the support leg 7 from sliding back and forth along the slot 9.

[0029] Example 2

[0030] This utility model discloses a method such as Figure 6 The sensor shown is for a temperature measurement system in a power distribution cabinet. The sensor includes the fixing device described in Embodiment 1, and a chip 10, which is an radio frequency chip, is installed in the groove 8 of the fixing device. A diagram showing the sensor mounted on the moving contact is shown below. Figure 2 As shown.

[0031] The temperature sensor has dimensions not exceeding 75*34*11 mm and features an ultra-high temperature resistance design, ensuring it will not be damaged within a temperature range of -40℃ to +225℃. The RF chip integrates a temperature sensing module, enabling low-power, high-precision, and high-resolution temperature measurement. It boasts a wide temperature measurement range, achieving accurate measurement from -40℃ to +150℃, with a measurement accuracy of ±1℃.

[0032] The RF chip conforms to the EPG Global Gen2 communication protocol and uses ultra-high frequency radio wave energy harvesting technology to obtain energy through 860MHz~960MHz radio frequency. The RF chip has two active pins, RF+ and GND, which serve as interfaces for external antennas. These antenna interfaces handle the operation of the RF chip, interaction, energy harvesting, air communication, sensor operation, and command execution.

[0033] The antenna type adopts the common short-circuit stub-fed microstrip antenna type, and the material is anti-metal ceramic material to maximize antenna gain.

[0034] In this embodiment, the EPC segment of the RF chip has a storage space of 96 bits; the TID segment has a storage space of 128 bits; of which 80 bits are the RF chip serial number, and it can be repeatedly erased and rewritten up to 100,000 times in a 25°C environment. The RF chip is equipped with symmetric encryption using the national cryptographic algorithm, allowing only authorized devices and personnel to access the data, preventing tampering and data loss during data transmission and storage.

[0035] By combining traditional RFID technology with sensing technology, wireless temperature sensors possess the unique information storage function and unique ID code characteristics of radar RFID tags. While monitoring temperature, they can also achieve functions such as unique identification of the monitored equipment and assist in manual inspection recording, realizing passive wireless temperature measurement. This facilitates the monitoring of key parts of switchgear temperature anomalies. At the same time, by uploading switchgear temperature node data, the temperature of the moving contact nodes of the switchgear can be monitored more meticulously at the local monitoring terminal.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sensor fixing device for a power distribution cabinet temperature measurement system, characterized in that, It includes a connector and a stop that cooperate with each other; the connector is a U-shaped structure, and the middle part of the rear side of the stop is provided with a groove for installing a chip. On each side of the groove, there is a set of slots for inserting the U-shaped support leg. The slots are open from front to back, and each set of slots is provided with a set screw for tightening the U-shaped support leg on its side wall.

2. The sensor fixing device for the temperature measurement system of the power distribution cabinet body according to claim 1, characterized in that, A clamping plate is provided on the inner side of the closed end of the U-shaped structure.

3. The sensor fixing device for the temperature measurement system of the power distribution cabinet body according to claim 2, characterized in that, An abutment block is also provided on the inner side of the closed end of the U-shaped structure, and the tightening piece is located on the outer side of the abutment block.

4. The sensor fixing device for the temperature measurement system of the power distribution cabinet body according to claim 3, characterized in that, The U-shaped support leg has an auxiliary snap-fit ​​piece on its outer side near the closed end of the U-shaped structure.

5. The sensor fixing device for the temperature measurement system of the power distribution cabinet body according to claim 4, characterized in that, Both the top clamping plate and the auxiliary snap-fit ​​plate are elastic plates with one end connected to the U-shaped structure body and the other end suspended.

6. The sensor fixing device for the temperature measurement system of the power distribution cabinet body according to claim 1, characterized in that, The upper and lower sidewalls of the slot are provided with elastic locking components for tightening the U-shaped support legs.

7. A sensor for a temperature measurement system of a power distribution cabinet, characterized in that, The sensor includes a sensor fixing device as described in any one of claims 1 to 6, wherein a chip is installed in the groove.

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