Temperature measuring device for low-voltage large-current busbar in alkaline environment

Abstract

The utility model discloses a temperature measuring device for a low-voltage large-current busbar in an alkaline environment, which is characterized in that a mounting bottom plate of the device is arranged on a fastening bolt of the busbar through a fastening nut, and a wireless temperature sensor is arranged on the mounting bottom plate; the temperature signal acquisition antenna receives a temperature signal sent by the wireless temperature sensor and transmits the temperature signal to the temperature signal processor through the radio frequency connecting line, the temperature signal processor transmits the processed temperature signal to the communication module, and the communication module transmits the temperature signal to the remote console. The temperature measuring device overcomes the defects of a traditional busbar temperature measuring mode, is not influenced by busbar thinning in an alkaline environment, detects the busbar temperature in real time, ensures the accuracy of busbar temperature detection, and avoids potential safety hazards.

Description

Technical Field

[0001] The utility model relates to the technical field of online detection of electrical equipment, in particular to a temperature measuring device for a low-voltage and high-current busbar in an alkaline environment. Background Art

[0002] In the alkali purification tank and electrolytic cell on the production line of the metallurgical industry, low-voltage and high-current busbars are used to connect transformers and electrodes. Since the busbar passes a large current and gradually becomes thinner during the production process, the low-voltage and high-current busbar is a loss part. Installing various temperature sensors in the middle of the busbar is prone to loosening after the busbar becomes thinner. Loose screws or loose busbar joints can easily lead to increased contact resistance, increased busbar temperature, deformation, damage, or even fire, which is a potential malfunction point for the equipment. Therefore, accurate detection of busbar temperature is the key to ensuring safe production.

[0003] Usually, the busbar is covered with an outer shell and cannot be observed by the naked eye. The cover is filled with alkaline gas and hot air generated after electrolysis, and the environment is very harsh. Conventional busbar temperature measurement devices include thermocouples, infrared temperature probes, thermistors, etc. Since the busbar has an outer shell, infrared temperature measurement cannot be used. The only way to infer whether the busbar is normal is to indirectly observe the outer shell temperature, which has a large error. Thermocouple and thermistor temperature measurement methods require a transformer or battery to provide power to send temperature information. In harsh environments, the newly added temperature measurement power supply equipment is easily damaged, and the insulation degradation of the power supply equipment is prone to explosion and other fault hazards. Another passive temperature measurement technology used in high-voltage switchgear cannot be directly applied to the temperature measurement of the busbar because it requires a very clean environment. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a temperature measuring device for a low-voltage and high-current busbar in an alkaline environment. The temperature measuring device overcomes the defects of the traditional busbar temperature measurement method, is not affected by the thinning of the busbar in the alkaline environment, detects the busbar temperature in real time, ensures the accuracy of the busbar temperature detection, and eliminates safety hazards.

[0005] In order to solve the above technical problems, the utility model provides a temperature measuring device for a low-voltage and high-current busbar in an alkaline environment, comprising a busbar fastening bolt, a mounting base plate, a wireless temperature sensor, a temperature signal acquisition antenna, a radio frequency connecting line, a temperature signal processor and a communication module. The mounting base plate is arranged on the fastening bolt through a fastening nut, the wireless temperature sensor is arranged on the mounting base plate, the temperature signal acquisition antenna receives the temperature signal sent by the wireless temperature sensor and transmits it to the temperature signal processor through the radio frequency connecting line, the temperature signal processor transmits the processed temperature signal to the communication module, and the communication module transmits the temperature signal to the remote control console.

[0006] Furthermore, the mounting base plate is a U-shaped plate made of titanium, the closed end or the open end of the U-shaped plate is inserted into the fastening bolt, the fastening nut is screwed on the fastening bolt to fasten the U-shaped plate, and the wireless temperature sensor is arranged on the U-shaped plate surface away from the fastening bolt.

[0007] Furthermore, the fastening nut is a thin nut made of titanium.

[0008] Furthermore, the wireless temperature sensor includes a PCBA board with a temperature measurement chip and a wireless transmission chip, a spiral antenna and an insulating shell antenna cover. The PCBA board is arranged close to the mounting base plate and is integrally potted on the mounting base plate surface with an anti-corrosion potting glue. The spiral antenna is connected to the wireless transmission chip of the PCBA board. The insulating shell antenna cover is arranged on the mounting base plate and covers the PCBA board and the spiral antenna.

[0009] Furthermore, the insulating shell antenna cover is a polyphenylene sulfide material cover, and the helical antenna is a gold-plated stainless steel material.

[0010] Furthermore, the temperature signal acquisition antenna is fixed on a site railing or equipment bracket by means of a pole.

[0011] Furthermore, the distance between the temperature signal acquisition antenna and the wireless temperature sensor is ≤2 meters.

[0012] Furthermore, the length of the radio frequency connecting line is less than 5 meters.

[0013] Furthermore, the temperature signal processor includes a microcontroller unit, a data storage unit and a power supply module. The microcontroller unit processes the received temperature signal, analyzes the reliability of the temperature data and compares it with a preset temperature value to determine whether an alarm is required, and generates an alarm signal. The data storage unit stores the temperature data, and the power supply module provides working power for the microcontroller unit, the data storage unit and the communication module.

[0014] Furthermore, the communication module includes a core MCU chip, a cellular communication module and a non-cellular communication module, the cellular communication module includes a 2G communication network, a 3G communication network, a 4G communication network and a 5G communication network, and the non-cellular communication module includes a WiFi wireless network, a Bluetooth wireless network, a ZigBee wireless network and a NB-IoT wireless network.

[0015] Since the temperature measuring device for low-voltage and high-current busbars in alkaline environments of the utility model adopts the above-mentioned technical solution, that is, the mounting base plate of the device is arranged on the fastening bolts of the busbar through fastening nuts, the wireless temperature sensor is arranged on the mounting base plate, the temperature signal acquisition antenna receives the temperature signal sent by the wireless temperature sensor and transmits it to the temperature signal processor through the radio frequency connection line, the temperature signal processor transmits the processed temperature signal to the communication module, and the communication module transmits the temperature signal to the remote control console. The temperature measuring device overcomes the defects of the traditional busbar temperature measurement method, is not affected by the thinning of the busbar in the alkaline environment, detects the busbar temperature in real time, ensures the accuracy of the busbar temperature detection, and eliminates safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0017] Figure 1 This is a schematic diagram of the structure of the temperature measuring device for a low-voltage and high-current busbar in an alkaline environment according to the utility model;

[0018] Figure 2 This is a schematic diagram of the wireless temperature sensor in the device;

[0019] Figure 3 This is a schematic diagram of the temperature signal processor in this device. DETAILED DESCRIPTION

[0020] Implementation example Figure 1 As shown, the temperature measuring device of the low-voltage and high-current busbar in an alkaline environment of the utility model includes a fastening bolt 11 of the busbar 1, a mounting base plate 2, a wireless temperature sensor 3, a temperature signal acquisition antenna 4, a radio frequency connecting line 5, a temperature signal processor 6 and a communication module 7. The mounting base plate 2 is arranged on the fastening bolt 11 through a fastening nut 21, the wireless temperature sensor 3 is arranged on the mounting base plate 2, the temperature signal acquisition antenna 4 receives the temperature signal sent by the wireless temperature sensor 3 and transmits it to the temperature signal processor 6 through the radio frequency connecting line 5, the temperature signal processor 6 transmits the processed temperature signal to the communication module 7, and the communication module 7 transmits the temperature signal to the remote control console.

[0021] Preferably, the mounting base plate 2 is a U-shaped plate made of titanium, the closed end or the open end of the U-shaped plate is inserted into the fastening bolt 11, the fastening nut 21 is screwed on the fastening bolt 11 to fasten the U-shaped plate, and the wireless temperature sensor 3 is arranged on the surface of the U-shaped plate away from the fastening bolt 11. The U-shaped plate can be conveniently installed on the fastening bolt through the fastening nut, providing convenient conditions for disassembly and assembly at the production site.

[0022] Preferably, the fastening nut 21 is a thin nut made of titanium. The U-shaped plate and the thin nut made of titanium improve corrosion resistance and increase the service life in an alkaline environment.

[0023] Preferably, Figure 2 As shown, the wireless temperature sensor 3 includes a PCBA board 31 with a temperature measurement chip and a wireless transmission chip, a spiral antenna 32 and an insulating shell antenna cover 33. The PCBA board 31 is arranged close to the mounting base plate 2 and is integrally potted on the mounting base plate 2 surface with an anti-corrosion potting glue 8. The spiral antenna 32 is connected to the wireless transmission chip of the PCBA board 31. The insulating shell antenna cover 33 is arranged on the mounting base plate 2 and covers the PCBA board 31 and the spiral antenna 32.

[0024] Preferably, the insulating shell antenna cover 33 is a polyphenylene sulfide material cover, and the spiral antenna 32 is a stainless steel gold-plated material. The anti-corrosion performance of polyphenylene sulfide material is second only to Teflon. The protection of the polyphenylene sulfide material cover ensures that the wireless temperature sensor can work normally in an alkaline environment; the stainless steel gold-plated spiral antenna improves the antenna gain and ensures the reliability of temperature signal transmission.

[0025] Preferably, the temperature signal acquisition antenna 4 is fixed on a site railing or equipment bracket by means of a pole.

[0026] Preferably, the distance between the temperature signal acquisition antenna 4 and the wireless temperature sensor 3 is ≤ 2 meters to ensure reliable wireless communication.

[0027] Preferably, the length of the radio frequency connecting line 5 is less than 5 meters.

[0028] Preferably, Figure 3 As shown, the temperature signal processor 6 includes a microcontroller unit 61, a data storage unit 62 and a power module 63. The microcontroller unit 61 processes the received temperature signal, analyzes the reliability of the temperature data and compares it with a preset temperature value to determine whether an alarm is needed, and generates an alarm signal. The data storage unit 62 stores the temperature data. The power module 63 provides working power to the microcontroller unit 61, the data storage unit 62 and the communication module 7.

[0029] Preferably, the communication module 7 includes a core MCU chip, a cellular communication module and a non-cellular communication module, the cellular communication module includes a 2G communication network, a 3G communication network, a 4G communication network and a 5G communication network, and the non-cellular communication module includes a WiFi wireless network, a Bluetooth wireless network, a ZigBee wireless network and a NB-IoT wireless network.

[0030] This device uses surface acoustic wave passive detection, and after insulation treatment and careful design of the installation position, it can realize the temperature measurement of low-voltage and high-current busbars in alkaline environments by wirelessly transmitting busbar temperature data.

[0031] This device chooses to set the installation base plate at the position of the fastening bolts at both ends of the busbar, and measures the busbar temperature through metal temperature conduction. In order to ensure that the fastening of the installed and running busbar is not affected, a wireless temperature sensor is set on the fastening bolts of the busbar through the installation base plate, and the temperature signal acquisition antenna is fixedly installed on the on-site railing or equipment bracket less than 2 meters away from the wireless temperature sensor by a pole holding method to realize wireless transmission of the temperature signal, and transmit the real-time temperature data of the busbar to the remote control console through the temperature signal processor and the communication module, so as to ensure the normal and reliable operation of the alkali purification tank and electrolytic cell on the production line of the metallurgical industry.

[0032] The device automatically monitors the temperature of the low-voltage and high-current busbar in an alkaline environment, issues an alarm message based on the set temperature alarm value, transmits the temperature monitoring value to the remote control console wirelessly, and can also receive remote control console instructions wirelessly to modify the temperature alarm value.

Claims

1. A temperature measuring device for a low-voltage, high-current busbar in an alkaline environment, comprising a fastening bolt for the busbar, characterized in that: It also includes a mounting base plate, a wireless temperature sensor, a temperature signal acquisition antenna, a radio frequency connecting line, a temperature signal processor and a communication module. The mounting base plate is arranged on the fastening bolt through a fastening nut, the wireless temperature sensor is arranged on the mounting base plate, the temperature signal acquisition antenna receives the temperature signal sent by the wireless temperature sensor and transmits it to the temperature signal processor through the radio frequency connecting line, the temperature signal processor transmits the processed temperature signal to the communication module, and the communication module transmits the temperature signal to the remote control console; the mounting base plate is a U-shaped plate made of titanium, and the closed end or the open end of the U-shaped plate The fastening bolt is inserted, and the fastening nut is screwed on the fastening bolt to fasten the U-shaped plate. The wireless temperature sensor is arranged on the U-shaped plate surface away from the fastening bolt; the fastening nut is a thin nut made of titanium; the wireless temperature sensor includes a PCBA board with a temperature measurement chip and a wireless transmission chip, a spiral antenna and an insulating shell antenna cover, the PCBA board is arranged close to the installation base plate and is integrally potted on the installation base plate surface with an anti-corrosion potting glue, the spiral antenna is connected to the wireless transmission chip of the PCBA board, and the insulating shell antenna cover is arranged on the installation base plate and covers the PCBA board and the spiral antenna.

2. The temperature measuring device for low voltage and high current busbar in alkaline environment according to claim 1 is characterized in that: The insulating shell antenna cover is made of polyphenylene sulfide material, and the helical antenna is made of gold-plated stainless steel.

3. The temperature measuring device for low voltage and high current busbar in alkaline environment according to claim 1 is characterized in that: The temperature signal acquisition antenna is fixed on the on-site railing or equipment bracket by means of a pole.

4. The temperature measuring device for low voltage and high current busbar in alkaline environment according to claim 3 is characterized in that: The distance between the temperature signal acquisition antenna and the wireless temperature sensor is ≤2 meters.

5. The temperature measuring device for low voltage and high current busbar in alkaline environment according to claim 1 is characterized in that: The length of the radio frequency connecting line is less than 5 meters.

6. The temperature measuring device for low voltage and high current busbar in alkaline environment according to claim 1 is characterized in that: The temperature signal processor includes a microcontroller unit, a data storage unit and a power module. The microcontroller unit processes the received temperature signal, analyzes the reliability of the temperature data and compares it with a preset temperature value to determine whether an alarm is needed, and generates an alarm signal. The data storage unit stores the temperature data. The power module provides working power for the microcontroller unit, the data storage unit and the communication module.

7. The temperature measuring device for low voltage and high current busbar in alkaline environment according to claim 1 is characterized in that: The communication module includes a core MCU chip, a cellular communication module and a non-cellular communication module. The cellular communication module includes a 2G communication network, a 3G communication network, a 4G communication network and a 5G communication network. The non-cellular communication module includes a WiFi wireless network, a Bluetooth wireless network, a ZigBee wireless network and a NB-IoT wireless network.

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